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1.
Prostate ; 84(10): 932-944, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38629249

RESUMO

BACKGROUND: KI67 is a well-known biomarker reflecting cell proliferation. We aim to elucidate the predictive role of KI67 in the efficacy of abiraterone for patients with advanced prostate cancer (PCa). METHODS: Clinicopathological data of 152 men with metastatic PCa, who received abiraterone therapy were retrospectively collected. The KI67 positivity was examined by immunohistochemistry using the prostate biopsy specimen. The predictive value of KI67 on the therapeutic efficacy of abiraterone was explored using Kaplan-Meier curve and Cox regression analysis. The endpoints included prostate-specific antigen (PSA) progression-free survival (PSA-PFS), radiographic PFS (rPFS), and overall survival (OS). RESULTS: In total, 85/152 (55.9%) and 67/152 (44.1%) cases, respectively, received abiraterone at metastatic hormone-sensitive (mHSPC) and castration-resistant PCa (mCRPC) stage. The median KI67 positivity was 20% (interquartile range: 10%-30%). Overall, KI67 rate was not correlated with PSA response. Notably, an elevated KI67-positive rate strongly correlated with unfavorable abiraterone efficacy, with KI67 ≥ 30% and KI67 ≥ 20% identified as the optimal cutoffs for prognosis differentiation in mHSPC (median PSA-PFS: 11.43 Mo vs. 26.43 Mo, p < 0.001; median rPFS: 16.63 Mo vs. 31.90 Mo, p = 0.003; median OS: 21.77 Mo vs. not reach, p = 0.005) and mCRPC (median PSA-PFS: 7.17 Mo vs. 12.20 Mo, p = 0.029; median rPFS: 11.67 Mo vs. 16.47 Mo, p = 0.012; median OS: 21.67 Mo vs. not reach, p = 0.073) patients, respectively. Multivariate analysis supported the independent predictive value of KI67 on abiraterone efficacy. In subgroup analysis, an elevated KI67 expression was consistently associated with unfavorable outcomes in the majority of subgroups. Furthermore, data from another cohort of 79 PCa patients with RNA information showed that those with KI67 RNA levels above the median had a significantly shorter OS than those below the median (17.71 vs. 30.72 Mo, p = 0.035). CONCLUSIONS: This study highlights KI67 positivity in prostate biopsy as a strong predictor of abiraterone efficacy in advanced PCa. These insights will assist clinicians in anticipating clinical outcomes and refining treatment decisions for PCa patients.


Assuntos
Androstenos , Biomarcadores Tumorais , Antígeno Ki-67 , Neoplasias da Próstata , Humanos , Masculino , Antígeno Ki-67/análise , Antígeno Ki-67/metabolismo , Idoso , Androstenos/uso terapêutico , Estudos Retrospectivos , Pessoa de Meia-Idade , Neoplasias da Próstata/tratamento farmacológico , Neoplasias da Próstata/patologia , Neoplasias da Próstata/metabolismo , Biomarcadores Tumorais/metabolismo , Biomarcadores Tumorais/análise , Proliferação de Células/efeitos dos fármacos , Antígeno Prostático Específico/sangue , Neoplasias de Próstata Resistentes à Castração/tratamento farmacológico , Neoplasias de Próstata Resistentes à Castração/patologia , Neoplasias de Próstata Resistentes à Castração/metabolismo , Resultado do Tratamento , Valor Preditivo dos Testes , Intervalo Livre de Progressão , Idoso de 80 Anos ou mais , Antineoplásicos/uso terapêutico
2.
World J Urol ; 42(1): 495, 2024 Aug 23.
Artigo em Inglês | MEDLINE | ID: mdl-39177844

RESUMO

OBJECTIVES: To develop and validate a prediction model for identifying non-prostate cancer (non-PCa) in biopsy-naive patients with PI-RADS category ≥ 4 lesions and PSA ≤ 20 ng/ml to avoid unnecessary biopsy. PATIENTS AND METHODS: Eligible patients who underwent transperineal biopsies at West China Hospital between 2018 and 2022 were included. The patients were randomly divided into training cohort (70%) and validation cohort (30%). Logistic regression was used to screen for independent predictors of non-PCa, and a nomogram was constructed based on the regression coefficients. The discrimination and calibration were assessed by the C-index and calibration plots, respectively. Decision curve analysis (DCA) and clinical impact curves (CIC) were applied to measure the clinical net benefit. RESULTS: A total of 1580 patients were included, with 634 non-PCa. Age, prostate volume, prostate-specific antigen density (PSAD), apparent diffusion coefficient (ADC) and lesion zone were independent predictors incorporated into the optimal prediction model, and a corresponding nomogram was constructed ( https://nomogramscu.shinyapps.io/PI-RADS-4-5/ ). The model achieved a C-index of 0.931 (95% CI, 0.910-0.953) in the validation cohort. The DCA and CIC demonstrated an increased net benefit over a wide range of threshold probabilities. At biopsy-free thresholds of 60%, 70%, and 80%, the nomogram was able to avoid 74.0%, 65.8%, and 55.6% of unnecessary biopsies against 9.0%, 5.0%, and 3.6% of missed PCa (or 35.9%, 30.2% and 25.1% of foregone biopsies, respectively). CONCLUSION: The developed nomogram has favorable predictive capability and clinical utility can help identify non-PCa to support clinical decision-making and reduce unnecessary prostate biopsies.


Assuntos
Nomogramas , Antígeno Prostático Específico , Próstata , Procedimentos Desnecessários , Humanos , Masculino , Pessoa de Meia-Idade , Antígeno Prostático Específico/sangue , Idoso , Procedimentos Desnecessários/estatística & dados numéricos , Biópsia , Próstata/patologia , Próstata/diagnóstico por imagem , Estudos Retrospectivos , Neoplasias da Próstata/patologia , Neoplasias da Próstata/sangue
3.
BMC Surg ; 24(1): 27, 2024 Jan 18.
Artigo em Inglês | MEDLINE | ID: mdl-38238716

RESUMO

INTRODUCTION: To explore if digital protractor could guide the anteversion of acetabular cup during primary THA and make it consistent with preoperative. METHODS: We retrospectively reviewed 172 cases of primary THA with direct anterior approach (DAA) over 2 years. The anteversion of acetabular cup were measured from computed tomography (CT) scan preoperative and de-identified plain radiographs postoperative by two blinded investigators who were not involved in the surgery. The effect of the digital protractor on the anteversion was determined using regression analysis. RESULTS: The mean anteversion for the THAs in digital protractor group was 15.5°and 21.4°in control group (P < 0.01). The mean anteversion bias for the THAs in digital protractor group was 1.59° and 6.63° in control group (P < 0.01).Regression analysis identified a 10.7% difference in anteversion due to the use of digital protractor (P < 0.01), and THAs performed without digital protractor were six times more likely to result in anteversion of > 25°. The correlation coefficient for the interobserver reliability of the measurement of the two investigators was 0.94. CONCLUSION: The digital protractor is a practical tool in the DAA for THA to determine the anteversion of the acetabular prosthesis.


Assuntos
Artroplastia de Quadril , Prótese de Quadril , Humanos , Artroplastia de Quadril/métodos , Estudos Retrospectivos , Reprodutibilidade dos Testes , Acetábulo/diagnóstico por imagem , Acetábulo/cirurgia
4.
Strahlenther Onkol ; 199(6): 525-535, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37093230

RESUMO

OBJECTIVE: Although single-fraction high-dose-rate brachytherapy (SFHDR) for localized prostate cancer has been tried in clinical trials, relevant medical evidence is currently lacking. It is necessary to systematically analyze the safety and efficacy of SFHDR. METHODS: Comprehensive and systematic searches for eligible studies were performed in PubMed, Embase, and the Cochrane Library databases. The primary endpoints included safety and efficacy, represented by toxic effects and biochemical recurrence-free survival (bRFS), respectively. The proportion rates were used as the effect measure for each study and were presented with corresponding 95% confidence intervals (CI) and related 95% prediction interval (PI). Restricted maximum-likelihood estimator (REML) and the Hartung-Knapp method were used in the meta-analysis. RESULTS: Twenty-five studies met the inclusion criteria for quantitative analysis, including 1440 patients. The median age of patients was 66.9 years old (62-73 years old) and the median follow-up was 47.5 months (12-75 months). The estimates of cumulative occurrence for severe gastrointestinal (GI) and genitourinary (GU) toxic effects were 0.1% (95% CI 0-0.2%) and 0.4% (95% CI 0-1.2%), and for grade 2 toxic effects were 1.6% (95% CI 0.1-4.7%) and 17.1% (95% CI 5.4-33.5%), respectively. The estimate of 3­year bRFS was 87.5% (95% CI 84.4-90.3%) and 71.0% (95% CI 63.0-78.3%) for 5­year bRFS. The pooled bRFS rates for low-risk patients were 99.0% (95% CI 85.2-100.0%) at 3 years and 80.9% (95% CI 75.4-85.9%) at 5 years, and the risk group was found to be statistically correlated with bRFS (3-year bRFS, P < 0.01; 5­year bRFS, P = 0.04). CONCLUSION: SFHDR is associated with favorable tolerability and suboptimal clinical benefit in patients with localized prostate cancer. Ongoing and planned high-quality prospective studies are necessary to verify its safety and efficacy.


Assuntos
Braquiterapia , Neoplasias da Próstata , Masculino , Humanos , Idoso , Pessoa de Meia-Idade , Braquiterapia/efeitos adversos , Braquiterapia/métodos , Estudos Prospectivos , Neoplasias da Próstata/radioterapia , Sistema Urogenital , Fatores de Risco
5.
Cell Mol Biol Lett ; 27(1): 62, 2022 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-35902802

RESUMO

Osteoarthritis (OA) is a widespread chronic degenerative joint disease characterized by the degeneration of articular cartilage or inflamed joints. Our findings indicated that treatment with artemisinin (AT) downregulates the protein levels of MMP3, MMP13, and ADAMTS5, which are cartilage degradation-related proteins in OA, and inhibits the expression of inflammatory factors in interleukin-1ß (IL-1ß)-stimulated chondrocytes. However, the mechanism of the role of AT in OA remains unclear. Here, we performed gene sequencing and bioinformatics analysis in control, OA, and OA + AT groups to demonstrate that several mRNA candidates were enriched in the PI3K/AKT/mTOR signaling pathway, and TNFSF11 was significantly downregulated after AT treatment. TNFSF11 was downregulated in the OA + AT group, whereas it was upregulated in rat OA tissues and OA chondrocytes. Therefore, we confirmed that TNFSF11 was the target gene of AT. In addition, our study revealed that AT relieved cartilage degradation and defection by activating mitochondrial autophagy via inhibiting the PI3K/AKT/mTOR signaling pathway in IL-1ß-induced chondrocytes. Furthermore, an OA model was established in rats with medial meniscus destabilization. Injecting AT into the knee joints of OA rat alleviated surgical resection-induced cartilage destruction. Thus, these findings revealed that AT relieves OA by activating mitochondrial autophagy by reducing TNFSF11 expression and inhibiting PI3K/AKT/mTOR signaling.


Assuntos
Artemisininas , Cartilagem Articular , Osteoartrite , Animais , Artemisininas/metabolismo , Artemisininas/farmacologia , Artemisininas/uso terapêutico , Autofagia , Cartilagem Articular/metabolismo , Condrócitos/metabolismo , Interleucina-1beta/farmacologia , Osteoartrite/genética , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Ligante RANK , Ratos , Transdução de Sinais , Serina-Treonina Quinases TOR/metabolismo
6.
Int Wound J ; 19(5): 1023-1038, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35266304

RESUMO

The cartilage repair and regeneration show inadequate self-healing capability and have some complications, which are inordinate challenges in clinical therapy. Biopolymeric injectable hydrogels, a prominent type of cell-carrier as well tissue engineering scaffolding materials, establish promising therapeutic potential of stem cell-based cartilage-regeneration treatment. In addition, injectable scaffolding biomaterial should have rapid gelation properties with adequate rheological and mechanical properties. In the present investigation, we developed and fabricated the macromolecular silk fibroin blended with polylysine modified chitosan polymer (SF/PCS) using thermal-sensitive glycerophosphate (GP), which contains effective gelation ability, morphology, porosity and also has enhanced mechanical properties to induce physical applicability, cell proliferation and nutrient exchange in the cell-based treatment. The developed and optimised injectable hydrogel group has good biocompatibility with human fibroblast (L929) cells and bone marrow-derived mesenchymal stem cells (BMSCs). Additionally, it was found that SF/PCS hydrogel group could sustainably release TGF-ß1 and efficiently regulate cartilage-specific and inflammatory-related gene expressions. Finally, the cartilage-regeneration potential of the hydrogel groups embedded with and without BMSCs were evaluated in SD rat models under histopathological analysis, which showed promising cartilage repair. Overall, we conclude that the TGF-ß1-SF/PCS injectable hydrogel demonstrates enhanced in vitro and in vivo tissue regeneration properties, which lead to efficacious therapeutic potential in cartilage regeneration.


Assuntos
Cartilagem Articular , Quitosana , Fibroínas , Nanopartículas , Animais , Células da Medula Óssea/metabolismo , Cartilagem Articular/fisiologia , Fibroínas/metabolismo , Fibroínas/farmacologia , Humanos , Hidrogéis , Ratos , Ratos Sprague-Dawley , Engenharia Tecidual , Alicerces Teciduais , Fator de Crescimento Transformador beta1/metabolismo
7.
BMC Musculoskelet Disord ; 21(1): 21, 2020 Jan 11.
Artigo em Inglês | MEDLINE | ID: mdl-31926554

RESUMO

BACKGROUND: The direct anterior approach for total hip arthroplasty (THA) has specific advantages, but injury to the tensor fasciae lata muscle (TFLM) remains a concern. This injury in part negates some of the advantages of the intermuscular approach, because injury of the muscle fibers of the TFLM can lead to less satisfactory clinical results. Thus, in this study, we propose an intraoperative method to protect the TFLM and demonstrate its feasibility. METHODS: Fifty-six patients undergoing THA by the direct anterior approach were divided randomly into two groups. In group A, the TFLM was protected by an autogenous tissue "pad" created from the anterior capsule of the joint which protect the TFLM from direct contact with the retractors. In group B, the operation was carried out with no protection of the TFLM except the attempt by the surgeons to consciously avoid injury of the TFLM. We evaluated magnitude of changes in the muscle cross-sectional area (MSCA) and fatty atrophy (FA) by magnetic resonance imaging. The differences in blood hemoglobin and serum levels of myoglobin, lactate dehydrogenase (LDH), and creatine phosphokinase (CPK) were compared at different time, postoperatively. The Harris hip score, postoperative drainage volume and visual analogue scores (VAS) were compared between the two groups. RESULTS: LDH, CPK and myoglobin in group B were significantly higher than group A at 8, 24, and 48 h after the surgery. (p < 0.05) Compared to the group A, the decrease of hemoglobin in group B displayed significantly at 24 and 48 h after surgery. (P < 0.05) The significantly increased MSCA and FA of TFLM were demonstrated in group B. The PDV and VAS in group B were significantly higher than group A. (P < 0.05) The Harris score in group A was significantly higher than group B (P < 0.05) one month after surgery, but there was no significant difference six months later. CONCLUSIONS: Using the anterior capsule of the hip joint as an autogenous, protective capsular tissue pad to limit the trauma to the TFLM during a direct anterior approach to THA is an effective method to protect the TFLM and improve the clinical effect. TRIAL REGISTRATION: ChiCTR: ChiCTR1900025173. Retrospectively registered August 15, 2019.


Assuntos
Artroplastia de Quadril/métodos , Fraturas do Colo Femoral/cirurgia , Idoso , Artroplastia de Quadril/estatística & dados numéricos , Fascia Lata , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Tratamentos com Preservação do Órgão , Estudos Prospectivos
8.
J Cell Mol Med ; 23(12): 8246-8257, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31560818

RESUMO

Excessive activation of the Wnt signalling pathway in the articular cartilage is demonstrated to be related to the onset and severity of osteoarthritis (OA). However, few studies have investigated the association between variants in Wnt-pathway-related genes and the risk of OA by searching Pubmed and EMBASE. Totally, 471 knee OA patients and 532 controls were recruited from three hospitals to evaluate the associations of five genetic variants (rs61735963, rs2908004, rs10795550, rs1799986 and rs1127379) with the risk of knee OA. These polymorphisms were genotyped through polymerase chain reaction and Sanger sequencing. Genetic risk scores (GRSs) were calculated to evaluate the combined effect of these genetic variants. No significant association was found between OA risk and polymorphisms (rs61735963, rs10795550 or rs1127379). However, WNT16 rs2908004 polymorphism was correlated with a decreased risk of OA, especially among females, smokers, non-drinkers and individuals with age < 60 years or BMI ≥ 25. This SNP was also associated with Kellgren-Lawrence grade and CRP. Similarly, LRP1 rs1799986 polymorphism decreased the risk of OA among males, smokers, drinkers and individuals with age < 60 years or BMI ≥ 25. TT genotype was more frequent in the group of VAS ≥ 6 versus VAS < 6. A low GRS was positively correlated with a decreased risk of OA. In addition, rs2908004 or rs1799986 polymorphism reduces the expression of WNT16 or LRP1. In conclusion, two SNPs (rs2908004 and rs1799986) are associated with the decreased risk of OA by regulating the Wnt pathway.


Assuntos
Predisposição Genética para Doença/genética , Osteoartrite do Joelho/genética , Polimorfismo de Nucleotídeo Único , Via de Sinalização Wnt/genética , beta Catenina/genética , Idoso , Alelos , Estudos de Casos e Controles , Feminino , Frequência do Gene , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Osteoartrite do Joelho/metabolismo , Osteoartrite do Joelho/patologia , Fatores de Risco , Proteínas Wnt/genética , Proteínas Wnt/metabolismo , beta Catenina/metabolismo
9.
Exp Cell Res ; 367(2): 119-131, 2018 06 15.
Artigo em Inglês | MEDLINE | ID: mdl-29601800

RESUMO

Ossification of the ligamentum flavum (OLF) is a debilitating disease resulting from the development of ectopic bone formation, which leads to the compression of the spinal cord. Nicotinamide phosphoribosyltransferase (NAMPT) was found to be upregulated and microRNA-182 (miR-182) was downregulated in OLF tissue. We investigated the effects of NAMPT and miR-182 expression in OLF cells and the influence on proteins associated with osteogenic differentiation. MiR-182 overexpression inhibited NAMPT, RUNX2, OCN and OPN mRNA and protein expression in OLF cells. Alkaline phosphatase (ALP) assay and Alizarin red staining confirmed reduced levels of osteogenic differentiation and mineralized nodule formation. Knockdown of NAMPT and the NAMPT inhibitor FK866 also inhibits RUNX2, OCN and OPN mRNA expression and protein levels, whereas overexpression of NAMPT promotes the expression of RUNX2, OCN and OPN and the generation of bone nodules. Dual-luciferase reporter assays revealed that miR-182 directly targets NAMPT and downregulates its expression. Transfection of OLF cells with miR-182 downregulated NAMPT and suppressed the regulation of RUNX2, OCN, and OPN by NAMPT overexpression. Overall, these data demonstrate that miR-182 suppresses OLF by downregulating NAMPT.


Assuntos
Citocinas/genética , Ligamento Amarelo/patologia , MicroRNAs/metabolismo , Nicotinamida Fosforribosiltransferase/genética , Ossificação Heterotópica/genética , Células Cultivadas , Citocinas/antagonistas & inibidores , Citocinas/metabolismo , Regulação da Expressão Gênica , Humanos , Nicotinamida Fosforribosiltransferase/antagonistas & inibidores , Nicotinamida Fosforribosiltransferase/metabolismo , Ossificação Heterotópica/metabolismo , Ossificação Heterotópica/patologia
10.
Med Sci Monit ; 25: 312-317, 2019 Jan 10.
Artigo em Inglês | MEDLINE | ID: mdl-30670678

RESUMO

BACKGROUND Worldwide, the increasing use of antibiotics has resulted in antimicrobial resistance, leading to studies to find alternative antimicrobial treatments. Tea polyphenols have antibacterial properties. Bacteriocins produced by probiotic lactobacilli can inhibit Gram-positive bacteria. This study used a rabbit model of infection, following femoral fracture with internal fixation, to evaluate the efficacy of the combined use of tea polyphenols and Lactobacillus plantarum ST8SH bacteriocin. MATERIAL AND METHODS Twenty-four New Zealand White rabbits underwent femoral fracture, internal fixation, and insertion of a mini-titanium implant, and were inoculated intravenously with suspensions of Staphylococcal bacteria. Four treatment groups included group A, injected with tea polyphenols and bacteriocins (N=6); group B, injected with cefradine and bacteriocins (N=6); group C, injected with tea polyphenols and cefradine (N=6); and group D (controls), injected with saline (N=6). Blood samples were collected at 1, 6, 12, 24, and 48 hours after the injection of bacteriocins. Biofilms that formed on the mini-titanium implant were studied by fluorescence microscopy. Serum levels of level of interleukin (IL)-8, IL-6, and tumor necrosis factor-α (TNF-α) were measured using an enzyme-linked immunosorbent assay (ELISA). RESULTS The combination of tea polyphenols and bacteriocins (group A) had a significant inhibitory effect on Staphylococcus aureus (P<0.05) and significant differences in serum levels of IL-8, TNF-α, and IL-6 levels in serum (P<0.05) when compared with groups, B, C, and D. CONCLUSIONS In a rabbit model of femoral fracture with internal fixation, the combined use of tea polyphenols and Lactobacillus plantarum ST8SH bacteriocin effectively controlled Staphylococcus aureus infection.


Assuntos
Bacteriocinas/farmacologia , Infecções/terapia , Polifenóis/farmacologia , Animais , Antibacterianos/farmacologia , Biofilmes/efeitos dos fármacos , Citocinas/análise , Citocinas/sangue , Modelos Animais de Doenças , Fraturas do Fêmur/terapia , Fixação Interna de Fraturas/métodos , Interleucina-8 , Lactobacillus plantarum/metabolismo , Coelhos , Staphylococcus aureus/efeitos dos fármacos , Staphylococcus aureus/patogenicidade , Chá , Fator de Necrose Tumoral alfa
11.
Med Sci Monit ; 25: 9728-9736, 2019 Dec 19.
Artigo em Inglês | MEDLINE | ID: mdl-31854381

RESUMO

BACKGROUND This retrospective analysis was designed to compare the outcomes of mid-shaft clavicle fracture operative treatment using bridge combined fixation system (BCFS) versus clavicular locking plate (CLP). MATERIAL AND METHODS Operative surgeries performed between January 2016 and July 2018 were included in the analysis. The surgical internal fixation implants were chosen according to surgeon preference and the choice of patients between the BCFS and CLP. Functional outcomes, fracture union, complications, pain, and patient satisfaction post-operation were assessed at a follow-up of 12 to 24 months. RESULTS Two hundred and seventeen (217) patients, aged 21-79 years, were operated, 87 using BCFS and 130 using CLP. The operation time of the BCFS group was significantly less than the CLP group (P<0.01). We also found that BCFS group had higher degree of satisfaction (100% vs. 97%, P<0.03) and less VAS scale (0.25±0.18 vs. 0.35±0.21, P<0.001) compared with the CLP group, but the significance could only be obtained during the follow-up at 3 months after surgery. No significant differences were observed between the 2 groups when compared for fracture unions, functional scores, or complications. CONCLUSIONS BCFS significantly reduced the operation time when compared with CLP. No significant differences were observed for functional outcomes, including fracture union and complications, and there was less pain and higher patient satisfaction. Both methods appeared to be safe in terms of complications. However, the effectiveness and safety of BCFS in treating comminuted multi-fragmentary mid-shaft clavicle fractures (AO/OTA 15-2C classification) need further confirmation.


Assuntos
Clavícula/patologia , Clavícula/cirurgia , Fixação Interna de Fraturas , Fraturas Ósseas/cirurgia , Próteses e Implantes , Adulto , Idoso , Clavícula/diagnóstico por imagem , Feminino , Fraturas Ósseas/diagnóstico por imagem , Humanos , Processamento de Imagem Assistida por Computador , Masculino , Pessoa de Meia-Idade , Satisfação do Paciente , Complicações Pós-Operatórias/etiologia , Estudos Retrospectivos , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Escala Visual Analógica , Adulto Jovem
12.
Cell Tissue Bank ; 20(4): 557-568, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31583486

RESUMO

The purpose of this paper is to analyze the properties of porcine cartilage type II collagen scaffolds crosslinked with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxy-succinamide (EDC/NHS) under different conditions. The porous EDC/NHS-crosslinked scaffolds were obtained through a two-step freeze-drying process. To determine the optimal crosslinking condition, we used different solvents and various crosslinking temperatures to prepare the scaffolds. Three crosslinking solutions were prepared with different solvents, photographs were taken with a flash in the darkroom, and light transmission was observed. Type II collagen was crosslinked on a horizontal shaker at a speed of 60 r/min according to the above grouping conditions, and then the structural change of the scaffold in each group was observed. To investigate the swelling ratio and the in vitro degradation of the collagen scaffold, tests were also carried out by immersion of the scaffolds in a PBS solution and digestion in type II collagenase, respectively. The influence of the scaffolds on the proliferation of chondrocytes was assessed by the methyl thiazolyl tetrazolium colorimetric assay. The morphology of the crosslinked scaffolds cocultured with chondrocytes was characterized by a scanning electron microscope. The results proved that 75% alcohol and a crosslinking temperature of 37 °C are recommended. Collagen fibrils are more densely packed after crosslinking with EDC/NHS and have a more uniform structure than that of noncrosslinked ones. The EDC-crosslinked scaffolds possessed excellent mechanical property and biocompatibility.


Assuntos
Colágeno Tipo II/química , Reagentes de Ligações Cruzadas/química , Succinimidas/química , Alicerces Teciduais/química , Animais , Proliferação de Células , Células Cultivadas , Condrócitos/citologia , Liofilização , Coelhos , Suínos , Engenharia Tecidual
13.
J Cell Physiol ; 234(1): 454-463, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-29932210

RESUMO

Elevated levels of follistatin-like protein 1 (FSTL1) have been found both in mouse models for human rheumatoid arthritis (RA) and collagen-induced arthritis (CIA). In this study, we elucidated the potential mechanisms by which FSTL1 contributes to the pathogenesis of RA. Fibroblast-like synoviocytes (FLSs) were established from synovial tissues of RA patients and stimulated with human recombinant FSTL1. Protein and mRNA expression levels of select matrix metalloproteinases (i.e., MMP1, MMP3, MMP13) in FLS were measured by, respectively, real-time RT-qPCR and ELISA. Activation of MAPK and other pathways that affect MMPs were evaluated by Western blotting. We also compared concentrations of MMPs in plasma in RA patients versus healthy controls (HC). Expression levels of MMP1, MMP3, and MMP13 were clearly stimulated by FSTL1 in vitro. FSTL1 activated the inflammation-related NF-κB signaling pathway, as well as all three mitogen-activated protein kinase (MAPK) pathways and the JAK/STAT3 pathway. Moreover, select chemical inhibitors that target p38 (SB203580), Erk1/2 (SP600125), JNK (SCH772984), STAT3 (AG490), and NF-κB (BAY 11-7082) significantly attenuated MMP expression. Inhibition of Toll-like receptor 4 by compound TAK-242 significantly abolished those effects of FSTL1. Importantly, elevated plasma concentrations of MMP3 were found to correlate with plasma FSTL1 levels in RA patients. These findings suggest that FSTL1 accelerates RA progression by activating MAPK, JAK/STAT3, and NF-κB pathways to enhance secretion of different MMPs and this enhancement is via TLR4. Targeting FSTL1 may provide a promising pharmacological drug therapy to ameliorate RA symptoms and perhaps reverse disease progression.


Assuntos
Artrite Reumatoide/genética , Proteínas Relacionadas à Folistatina/genética , Proteínas Recombinantes/farmacologia , Sinoviócitos/metabolismo , Animais , Artrite Reumatoide/sangue , Artrite Reumatoide/tratamento farmacológico , Artrite Reumatoide/fisiopatologia , Proteínas Relacionadas à Folistatina/farmacologia , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Janus Quinases/genética , Metaloproteinase 1 da Matriz/genética , Metaloproteinase 13 da Matriz/genética , Metaloproteinase 3 da Matriz/genética , Camundongos , Quinases de Proteína Quinase Ativadas por Mitógeno/genética , Cultura Primária de Células , Proteínas Recombinantes/genética , Fator de Transcrição STAT3/genética , Transdução de Sinais/genética , Sinoviócitos/efeitos dos fármacos , Sinoviócitos/patologia
14.
Cell Physiol Biochem ; 50(4): 1510-1521, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30359987

RESUMO

BACKGROUND/AIMS: Periodic mechanical stress has been shown to promote extracellular matrix (ECM) synthesis and cell migration of nucleus pulposus (NP) cells, however, the mechanisms need to be fully elucidated. The present study aimed to investigate the signal transduction pathway in the regulation of NP cells under periodic mechanical stress. METHODS: Primary rat NP cells were isolated and seeded on glass slides, and then treated in our self-developed periodic stress field culture system. To further explore the mechanisms, data were analyzed by scratch-healing assay, quantitative reverse transcription polymerase chain reaction (RT-qPCR) analysis, western blotting, and co-immunoprecipitation assay. RESULTS: Under periodic mechanical stress, the mRNA expression of ECM collagen 2A1 (Col2A1) and aggrecan, and migration of NP cells were significantly increased (P < 0.05 for each), associating with increases in the phosphorylation of Src, GIT1, and ERK1/2 (P < 0.05 for each). Pretreatment with the Src inhibitor PP2 reduced periodic mechanical stress-induced ECM synthesis and cell migration of NP cells (P < 0.05 for each), while the phosphorylation of GIT1 and ERK1/2 were inhibited. ECM synthesis, cell migration, and phosphorylation of ERK1/2 were inhibited after pretreatment with the small interfering RNA for GIT1 in NP cells under periodic mechanical stress (P < 0.05 for each), whereas the phosphorylation of Src was not affected. Pretreatment with the ERK1/2 inhibitor PD98059 reduced periodic mechanical stress-induced ECM synthesis and cell migration of NP cells (P < 0.05 for each). Co-immunoprecipitation assay showed that there was a direct interaction between Src and GIT1 and between GIT1 and ERK1/2. CONCLUSION: In conclusion, periodic mechanical stress induced ECM expression and migration of NP cells via Src-GIT1-ERK1/2 signaling pathway, playing an important role in regulation of NP cells.


Assuntos
Proteínas de Ciclo Celular/metabolismo , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Fosfoproteínas/metabolismo , Estresse Mecânico , Quinases da Família src/metabolismo , Agrecanas/metabolismo , Animais , Proteínas de Ciclo Celular/antagonistas & inibidores , Proteínas de Ciclo Celular/genética , Movimento Celular/efeitos dos fármacos , Células Cultivadas , Colágeno Tipo II/metabolismo , Matriz Extracelular/metabolismo , Flavonoides/farmacologia , Proteína Quinase 1 Ativada por Mitógeno/antagonistas & inibidores , Proteína Quinase 3 Ativada por Mitógeno/antagonistas & inibidores , Núcleo Pulposo/citologia , Núcleo Pulposo/metabolismo , Fosfoproteínas/antagonistas & inibidores , Fosfoproteínas/genética , Fosforilação/efeitos dos fármacos , Pirimidinas/farmacologia , Interferência de RNA , RNA Interferente Pequeno/metabolismo , Ratos , Ratos Sprague-Dawley , Transdução de Sinais/efeitos dos fármacos , Quinases da Família src/antagonistas & inibidores
15.
Orthopade ; 47(7): 574-584, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-29404628

RESUMO

OBJECTIVE: The aim of this study was to systematically review the efficacy of percutaneous transforaminal endoscopic discectomy (PTED) and fenestration discectomy (FD) in the treatment of lumbar disc herniation (LDH). MATERIAL AND METHODS: We performed a systematic search in MEDLINE, EMBASE, PubMed, Web of Science, Cochrane databases, Chinese Biomedical Literature Database, CNKI, and Wanfang Data for all relevant studies. All statistical analyses wer performed using Review Manager version 5.3. Dichotomous data were calculated by odds ratio (OR) and continuous data were calculated by mean difference (MD) with 95% confidence intervals (CI). RESULTS: A total of 17 articles with 1390 study subjects were included, with 733 patients in the PTED group and 657 patients in the FD group. The results of the meta-analysis showed that postoperative the visual analog scale (VAS) score (mean difference [MD] -0.13; 95% confidence interval [CI] -0.22 to -0.03; P = 0.009) and postoperative complications (MD 0.52; 95% CI 0.26 to 1.04; P = 0.06) showed no significant differences between the PTED group and the FD group, while the PTED group had significantly better results in operation time (MD 0.47; 95% CI -11.34 to 12.28; P = 0.94), length of incision (MD -3.74; 95% CI -4.28 to -3.19; P < 0.00001), amount of bleeding (MD -63.66, 95% CI -77.65 to -49.67; P < 0.00001), time of postoperative bed rest (MD -90.19; 95% CI -106.82 to -73.56; P < 0.00001), hospitalization time (MD -5.90; 95% CI -7.21 to -4.59; P < 0.00001), and postoperative Oswestry disability index (ODI) score (MD -0.59; 95% CI -1.11 to -0.08; P = 0.02) compared with the FD group. CONCLUSION: The Percutaneous transforaminal endoscopic discectomy is associated with better postoperative ODI score, better results in length of incision, lower blood loss, shorter operation time, postoperative bed time and hospitalization time. The complications did not differ significantly between PTED and FD in the treatment of lumbar disc herniation. These findings provide evidence to support PTED is efficacious for LDH; however, scar repair of a ruptured anulus fibrosus needs a long time and the patients undergoing PTED should be advised to stay in bed for a long time even if the symptoms are markedly relieved. These results are not limited to randomized controlled trials and lack data about the long-term outcome.


Assuntos
Discotomia Percutânea/métodos , Deslocamento do Disco Intervertebral/cirurgia , Vértebras Lombares/cirurgia , Humanos , Região Lombossacral/cirurgia , Procedimentos Cirúrgicos Minimamente Invasivos , Resultado do Tratamento
16.
J BUON ; 23(6): 1816-1824, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30610808

RESUMO

PURPOSE: MicroRNAs (miRs) are endogenous, noncoding small RNAs that play a key role in regulating biological and pathological processes. The oncogenic properties of miR-199b-5p have been demonstrated in previous studies but the effect of miR-199b-5p on osteosarcoma (OS) has not yet been clarified. This study aimed to investigate the effect of miR-199b-5p on OS and the relationship between this miR and the pathological parameters and prognosis of OS. METHODS: MiR-199b-5p expression in 57 pairs of OS tissues, corresponding adjacent normal tissues and OS cells was measured by quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR).The relationship between miR-199b-5p and the pathological features and prognosis of OS patients was examined. We constructed small interfering (si) RNA to knock down miR-199b-5p expression in OS cell lines MG63 and U2OS. Cell Counting Kit-8 (CCK-8), cell cloning assay and Transwell cell migration and invasion assay were applied for investigating the biological function of miR-199b-5p, respectively. Finally, western blot was used for exploring its underlying mechanism. RESULTS: MiR-199b-5p expression in OS was significantly higher than that of normal tissues. Compared to patients w\sith low expression of miR-199b-5p, patients with high expression level tended to be with younger age, higher incidence of distant metastases and lower overall survival. Compared with interference sequence negative control (si-NC) group, the abilities of proliferation, invasion and metastasis of cells transfected with si-miR-199b-5p were significantly decreased. Western blot analysis indicated that expressions of key proteins related to epithelial to mesenchymal transition (EMT) signaling pathway, including N-cadherin, Vimentin, ß-catenin and matrix metalloproteinase-9 (MMP9), were significantly decreased after transfection with si-miR-199b-5p. Furthermore, we found that miR-199b-5p promoted the progression of OS mainly through regulating HER2. CONCLUSIONS: Upregulated miR-199b-5p is significantly related with stage, distant metastasis and poor prognosis of OS. This MiR may promote progression of OS through regulating HER2.


Assuntos
Biomarcadores Tumorais/metabolismo , Neoplasias Ósseas/patologia , Regulação Neoplásica da Expressão Gênica , MicroRNAs/genética , Osteossarcoma/secundário , Receptor ErbB-2/metabolismo , Adulto , Biomarcadores Tumorais/genética , Neoplasias Ósseas/genética , Neoplasias Ósseas/metabolismo , Estudos de Casos e Controles , Movimento Celular , Proliferação de Células , Progressão da Doença , Transição Epitelial-Mesenquimal , Feminino , Seguimentos , Humanos , Masculino , Invasividade Neoplásica , Metástase Neoplásica , Osteossarcoma/genética , Osteossarcoma/metabolismo , Prognóstico , Receptor ErbB-2/genética , Transdução de Sinais , Taxa de Sobrevida , Adulto Jovem
17.
Cell Physiol Biochem ; 39(4): 1281-94, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27606614

RESUMO

BACKGROUND/AIMS: The present study aimed to analyze the mechanisms by which periodic mechanical stress is translated into biochemical signals, and to verify the important role of signaling molecules including phosphatidylinositol-3-kinase (PI3K)-Akt, protein kinase C (PKC), and epidermal growth factor receptor (EGFR) in chondrocyte proliferation. The effects of periodic mechanical stress on the mitogenesis of chondrocytes have been studied extensively in recent years. However, the mechanisms underlying the ability of chondrocytes to sense and respond to periodic mechanical stress need further investigation. METHODS: Two steps were undertaken in the experiment. In the first step, the cells were pretreated with shRNA targeted to Akt or EGFR or PKCδ or control scrambled shRNA. Moreover, they were pretreated with LY294002, GF109203X, Gö6976, rottlerin, and AG1478. They were maintained under static conditions or periodic mechanical stress for 3 days, 8 h per day, prior to direct cell counting and CCK-8 assay, respectively. In the second step, the cells were pretreated with shRNA targeted to Akt or EGFR or PKCδ or control scrambled shRNA. Moreover, they were pretreated with LY294002, AG1478, and rottlerin. They were maintained under static conditions or periodic mechanical stress for 1 h prior to Western blot analysis. RESULTS: Proliferation was inhibited by pretreatment with PKC or PKCδ inhibitor GF109203X or rottlerin and by short hairpin RNA (shRNA) targeted to PKCδ, but not by PKCα inhibitor Gö6976 in chondrocytes in response to periodic mechanical stress. Meantime, rottlerin and shRNA targeted to PKCδ also attenuated EGFR, Akt, and ERK1/2 activation. Furthermore, inhibiting EGFR activity by AG1478 and shRNA targeted to EGFR abrogated chondrocyte proliferation and phosphorylation levels of Akt and extracellular signal-regulated kinase (ERK)1/2 subjected to periodic mechanical stress, while the phosphorylation site of PKCδ was not affected. In addition, pretreatment with the PI3K-Akt-selective inhibitor LY294002 and shRNA targeted to Akt reduced periodic mechanical stress-induced chondrocyte proliferation and phosphorylation of ERK1/2, while the phosphorylation levels of EGFR and PKCδ were not inhibited. CONCLUSION: These findings suggested that periodic mechanical stress promoted chondrocyte proliferation through PKCδ-EGFR-PI3K-Akt-ERK1/2. They provide a stronger viewpoint for further investigations into chondrocyte mechanobiology under periodic mechanical stress and the ways to improve the quality of tissue-engineered cartilage.


Assuntos
Condrócitos/metabolismo , Receptores ErbB/genética , Proteína Quinase 1 Ativada por Mitógeno/genética , Proteína Quinase 3 Ativada por Mitógeno/genética , Fosfatidilinositol 3-Quinases/genética , Proteína Quinase C-delta/genética , Proteínas Proto-Oncogênicas c-akt/genética , Estresse Mecânico , Animais , Técnicas de Cultura de Células , Proliferação de Células/efeitos dos fármacos , Condrócitos/citologia , Condrócitos/efeitos dos fármacos , Inibidores Enzimáticos/farmacologia , Receptores ErbB/antagonistas & inibidores , Receptores ErbB/metabolismo , Feminino , Regulação da Expressão Gênica , Bombas de Infusão , Masculino , Mecanotransdução Celular , Proteína Quinase 1 Ativada por Mitógeno/antagonistas & inibidores , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/antagonistas & inibidores , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Periodicidade , Fosfatidilinositol 3-Quinases/metabolismo , Inibidores de Fosfoinositídeo-3 Quinase , Cultura Primária de Células , Proteína Quinase C-delta/antagonistas & inibidores , Proteína Quinase C-delta/metabolismo , Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores , Proteínas Proto-Oncogênicas c-akt/metabolismo , RNA Interferente Pequeno/genética , RNA Interferente Pequeno/metabolismo , Ratos , Ratos Sprague-Dawley
18.
Biochem Biophys Res Commun ; 469(3): 723-30, 2016 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-26707876

RESUMO

The mitogenic effects of periodic mechanical stress on nucleus pulpous cells have been studied extensively but the mechanisms whereby nucleus pulpous cells sense and respond to mechanical stimulation remain a matter of debate. We explored this question by performing cell culture experiments in our self-developed periodic stress field and perfusion culture system. Under periodic mechanical stress, rat nucleus pulpous cell proliferation was significantly increased (p < 0.05 for each) and was associated with increases in the phosphorylation and activation of EGFR, Rac1, and ERK1/2 (p < 0.05 for each). Pretreatment with the ERK1/2 selective inhibitor PD98059 reduced periodic mechanical stress-induced nucleus pulpous cell proliferation (p < 0.05 for each), while the activation levels of EGFR and Rac1 were not inhibited. Proliferation and phosphorylation of ERK1/2 were inhibited after pretreatment with the Rac1 inhibitor NSC23766 in nucleus pulpous cells in response to periodic mechanical stress (p < 0.05 for each), while the phosphorylation site of EGFR was not affected. Inhibition of EGFR activity with AG1478 abrogated nucleus pulpous cell proliferation (p < 0.05 for each) and attenuated Rac1 and ERK1/2 activation in nucleus pulpous cells subjected to periodic mechanical stress (p < 0.05 for each). These findings suggest that periodic mechanical stress promotes nucleus pulpous cell proliferation in part through the EGFR-Rac1-ERK1/2 signaling pathway, which links these three important signaling molecules into a mitogenic cascade.


Assuntos
Receptores ErbB/metabolismo , Disco Intervertebral/citologia , Disco Intervertebral/fisiologia , Sistema de Sinalização das MAP Quinases/fisiologia , Mecanotransdução Celular/fisiologia , Proteínas rac1 de Ligação ao GTP/metabolismo , Animais , Proliferação de Células/fisiologia , Células Cultivadas , Feminino , Regulação da Expressão Gênica/fisiologia , Masculino , Mitose/fisiologia , Moduladores de Mitose/metabolismo , Fosforilação , Estimulação Física/métodos , Ratos , Ratos Sprague-Dawley , Estresse Mecânico , Estresse Fisiológico/fisiologia
19.
Int J Exp Pathol ; 96(6): 387-94, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26764085

RESUMO

The role of lncRNAs in pathologies of tendinopathy has not been researched so far, this study aims to identify the role and potent mechanism of lncRNAs in tendinopathy with a bioinformatic analysis. The gene profile of GSE26051 based on the platform of Affymetrix Human Genome U133B Array condensed was downloaded from Gene Expression Omnibus. A total of 46 specimens (including 23 normal samples and 23 tendinopathy specimens) were available. Compared with the control samples, differentially expressed genes (DEGs) of tendinopathy was identified the by packages in R. The selected DEGs were further analysed using bioinformatics methods including co-expression and enrichment analysis to detect the potential role of lncRNAs. A total of 40 different expressed lncRNAs were identified. However, most of the identified lncRNAs have not been researched before. And this study only annotate one of the identified lncRNAs successfully, the LOC100507027 (myoregulin), with the potential role in regulating skeletal muscle tissue development and skeletal muscle organ development.


Assuntos
Perfilação da Expressão Gênica/métodos , Análise de Sequência com Séries de Oligonucleotídeos , RNA Longo não Codificante/genética , Tendinopatia/genética , Estudos de Casos e Controles , Biologia Computacional , Bases de Dados Genéticas , Regulação da Expressão Gênica , Redes Reguladoras de Genes , Estudos de Associação Genética , Marcadores Genéticos , Humanos , Tendinopatia/diagnóstico
20.
J Arthroplasty ; 29(12): 2298-304, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24295800

RESUMO

Subvastus, midvastus and medial parapatellar approaches are the most popular approaches in total knee arthroplasty (TKA). However, the superior approach in TKA still remains controversial. We therefore conducted a meta-analysis to quantitatively compare the midvastus and subvastus approaches to the medial parapatellar approach in TKA. A total of 32 randomized controlled trials (RCTs) with 2451 TKAs in 2129 patients were included in this study. The meta-analysis suggested that, when compared with the medial parapatellar approach, the midvastus approach showed better outcomes in pain and knee range of motion at postoperative 1-2weeks but also was associated with longer operative time; the subvastus approach showed better outcomes in knee range of motion at postoperative 1week, straight leg raise and lateral retinacular release.


Assuntos
Artroplastia do Joelho/métodos , Articulação do Joelho/cirurgia , Humanos , Patela/cirurgia , Músculo Quadríceps/cirurgia , Ensaios Clínicos Controlados Aleatórios como Assunto , Amplitude de Movimento Articular , Resultado do Tratamento
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