Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 24
Filtrar
Mais filtros











Base de dados
Intervalo de ano de publicação
1.
Heliyon ; 10(16): e36222, 2024 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-39247301

RESUMO

Background: Hip fractures primarily occur in older people and represent a significant public health issue due to their high incidence and mortality rate. The concurrent occurrence of venous thromboembolism (VTE) during the perioperative period exacerbates the threat to patient health. Methods: We retrieved all articles related to hip fracture surgery and venous VTE from the Web of Science core collection database from 2000 to 2023. For bibliometric analysis, we extracted relevant information, including year of publication, country, institution, journal, impact factor, title, author, category, reference, keywords, number of citations, average number of citations, and H-index. Results: A total of 1079 articles were retrieved, with 67 countries, 341 institutions, and 256 journals participating in research on hip fracture surgery and venous thromboembolism. The overall research showed an increasing trend. The United States, Harvard University, Injury-International Journal of The Care of The Injured, and Lassen MR are the leading country, institution, journal, and author respectively, in terms of publication. Research directions in this field mainly include the impact of preoperative anticoagulation on fracture surgery, intraoperative blood protection strategies, and postoperative prevention and treatment of VTE. Hotspots and trends in research include the relationship between direct oral anticoagulants and surgical timing, perioperative blood protection, intertrochanteric fractures, and geriatric traumatic fractures. Conclusions: This study constructed the knowledge structure of hip fracture surgery and VTE and identified research hotspots and trends. Future research should focus on developing a prediction system for VTE in hip fracture surgery to guide individualized prevention and treatment.

2.
Br J Ophthalmol ; 2024 Sep 17.
Artigo em Inglês | MEDLINE | ID: mdl-39237290

RESUMO

AIMS: This study evaluates the long-term efficacy and safety of carbon dioxide (CO2) laser excision as a novel treatment for large xanthelasma palpebrarum. METHODS: The study included 295 patients diagnosed with xanthelasma palpebrarum, categorised as 246 patients with grade I, 16 with grade II, 22 patients with grade III and 11 with grade IV lesions. All underwent CO2 laser excision and were followed up for a 12-month period. Treatment efficacy was assessed through clearance and recurrence rates, evaluated using digital photography and complications were recorded. RESULTS: The participant group consisted of 66 males and 229 females, with an average age of 41.7±11.6 years. Clearance rates exceeded 99% for grades I-III and were around 95% for grade IV lesions. The recurrence rate was 6.8%, with higher recurrence rates observed in lesions over 2 mm in height compared with those under 2 mm (p<0.001). The main complications over the 12-month follow-up were scarring (4.4%), hyperpigmentation (8.1%) and hypopigmentation (8.5%), with no severe complications reported. CONCLUSION: CO2 laser excision emerges as a precise, minimally invasive and effective modality for treating xanthelasma palpebrarum, marking a significant advancement in treatment modalities. Further research is required to reinforce these results and refine treatment protocols.

3.
Artigo em Inglês | MEDLINE | ID: mdl-39107549

RESUMO

PROPOSE: This study aims to present long-term outcomes in a specific patient population experiencing epiphora due to low-level nasolacrimal duct obstruction (NLDO) following endonasal endoscopic nasolacrimal duct rhinostomy, and to propose a surgical selection paradigm for varying locations of NLDO. METHODS: Between September 1, 2017 and February 28, 2023, a retrospective analysis was conducted on 26 patients diagnosed with primary acquired nasolacrimal duct obstruction (PANDO) who underwent endonasal endoscopic nasolacrimal duct rhinostomy for low-level NLDO (defined as obstruction below the plane of the superior border of the inferior turbinate attachment). The study assessed surgical success through objective measures of anatomical patency and subjective measures of functional patency during a postoperative follow-up period of at least six months. Additionally, any complications that arose during this follow-up period were documented. RESULTS: The study included a cohort of 26 patients, consisting of 24 women and 2 men, with a mean age of 47.58 ± 3.09 years (range: 8-75). All patients underwent endoscopic nasolacrimal duct rhinostomy, with 10 eyes having previously undergone tear duct recanalization procedures. Anatomical patency was achieved in 88.5% (23/26) of cases, while functional patency was achieved in 80.8% (21/26) after an average follow-up period of 41.9 ± 22.1 months. No significant complications were observed in any of the patients during the follow-up period. CONCLUSION: Endonasal endoscopic nasolacrimal duct rhinostomy is effective in treating epiphora in over 80% of cases with low-level NLDO. Tailoring the surgery to the location of the obstruction can improve outcomes and minimize damage.

4.
J Neuroinflammation ; 21(1): 112, 2024 Apr 29.
Artigo em Inglês | MEDLINE | ID: mdl-38684986

RESUMO

BACKGROUND: Dimethyl fumarate (DMF) is a fumaric acid ester that exhibits immunoregulatory and anti-inflammatory properties. However, the function of DMF in autoimmune uveitis (AU) is incompletely understood, and studies comprehensively exploring the impact of DMF on immune cells are still lacking. METHODS: To explore the function of DMF in uveitis and its underlying mechanisms, we conducted single-cell RNA sequencing (scRNA-seq) on the cervical draining lymph node (CDLN) cells of normal, experimental autoimmune uveitis (EAU), and DMF-treated EAU mice. Additionally, we integrated scRNA-seq data of the retina and CDLNs to identify the potential impact of DMF on ocular immune cell infiltration. Flow cytometry was conducted to verify the potential target molecules of DMF. RESULTS: Our study showed that DMF treatment effectively ameliorated EAU symptoms. The proportional and transcriptional alterations in each immune cell type during EAU were reversed by DMF treatment. Bioinformatics analysis in our study indicated that the enhanced expression of Pim1 and Cxcr4 in EAU was reversed by DMF treatment. Further experiments demonstrated that DMF restored the balance between effector T (Teff) /regulatory T (Treg) cells through inhibiting the pathway of PIM1-protein kinase B (AKT)-Forkhead box O1 (FOXO1). By incorporating the scRNA-seq data of the retina from EAU mice into analysis, our study identified that T cells highly expressing Pim1 and Cxcr4 were enriched in the retina. DMF repressed the ocular infiltration of Teff cells, and this effect might depend on its inhibition of PIM1 and CXCR4 expression. Additionally, our study indicated that DMF might reduce the proportion of plasma cells by inhibiting PIM1 expression in B cells. CONCLUSIONS: DMF effectively attenuated EAU symptoms. During EAU, DMF reversed the Teff/Treg cell imbalance and suppressed the ocular infiltration of Teff cells by inhibiting PIM1 and CXCR4 expression. Thus, DMF may act as a new drug option for the treatment of AU.


Assuntos
Anti-Inflamatórios não Esteroides , Doenças Autoimunes , Fumarato de Dimetilo , Imunossupressores , Retina , Uveíte , Fumarato de Dimetilo/administração & dosagem , Fumarato de Dimetilo/farmacologia , Uveíte/genética , Uveíte/imunologia , Uveíte/terapia , Doenças Autoimunes/genética , Doenças Autoimunes/imunologia , Doenças Autoimunes/terapia , Análise da Expressão Gênica de Célula Única , Modelos Animais de Doenças , Animais , Camundongos , Feminino , Camundongos Endogâmicos C57BL , Receptores CXCR4/genética , Receptores CXCR4/metabolismo , Proteínas Proto-Oncogênicas c-pim-1/genética , Proteínas Proto-Oncogênicas c-pim-1/metabolismo , Transcrição Gênica , Subpopulações de Linfócitos T/efeitos dos fármacos , Subpopulações de Linfócitos T/imunologia , Atlas como Assunto , Imunossupressores/administração & dosagem , Imunossupressores/farmacologia , Anti-Inflamatórios não Esteroides/administração & dosagem , Anti-Inflamatórios não Esteroides/farmacologia , Retina/efeitos dos fármacos , Retina/imunologia , Linfonodos/efeitos dos fármacos , Linfonodos/imunologia
6.
Invest Ophthalmol Vis Sci ; 64(12): 28, 2023 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-37713206

RESUMO

Purpose: This study aimed to elucidate the impact of upadacitinib, a Janus kinase 1 (JAK1)-specific inhibitor, on experimental autoimmune uveitis (EAU) and explore its underlying mechanisms. Methods: We utilized single-cell RNA sequencing (scRNA-seq) and single-cell assay for transposase-accessible chromatin sequencing (scATAC-seq) to investigate the JAK/signal transducer and activator of transcription (STAT) pathway in peripheral blood mononuclear cells (PBMCs) of 12 patients with Vogt-Koyanagi-Harada (VKH) disease and cervical draining lymph node (CDLN) cells of EAU. After treating EAU with upadacitinib, we analyzed immune cell gene expression and cell-cell communication by integrating scRNA data. Additionally, we applied flow cytometry and western blot to analyze the CDLN cells. Results: The JAK/STAT pathway was found to be upregulated in patients with VKH disease and EAU. Upadacitinib effectively alleviated EAU symptoms, reduced JAK1 protein expression, and suppressed pathogenic CD4 T cell (CD4TC) proliferation and pathogenicity while promoting Treg proliferation. The inhibition of pathogenic CD4TCs by upadacitinib was observed in both flow cytometry and scRNA data. Additionally, upadacitinib was found to rescue the interferon-stimulated gene 15 (ISG15)+ CD4TCs and CD8 T and B cell ratios and reduce expression of inflammatory-related genes. Upadacitinib demonstrated the ability to inhibit abnormally activated cell-cell communication, particularly the CXCR4-mediated migration pathway, which has been implicated in EAU pathogenesis. CXCR4 inhibitors showed promising therapeutic effects in EAU. Conclusions: Our findings indicate that the JAK1-mediated signaling pathway is significantly upregulated in uveitis, and upadacitinib exhibits therapeutic efficacy against EAU. Furthermore, targeting the CXCR4-mediated migration pathway could be a promising therapeutic strategy.


Assuntos
Uveíte , Síndrome Uveomeningoencefálica , Humanos , Transdução de Sinais , Janus Quinases , Leucócitos Mononucleares , Fatores de Transcrição STAT , Uveíte/tratamento farmacológico , Análise de Célula Única
7.
Heliyon ; 9(4): e15435, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37123901

RESUMO

Cash holdings are an essential element of corporate decision-making. Culture, such as the unique Chinese red culture created by the Communist Party of China during the Revolutionary War, affected corporate economic decisions. This study systematically evaluated the impact of red culture on corporate cash holdings. Based on a theoretical analysis, this study conducts an empirical analysis using data on Chinese-listed companies from 2008 to 2021. The results show that: (1) red culture reduces corporate cash holdings. For each unit of red cultural influence, corporate cash holdings decreased by 1.5979% points. (2) The role of red culture in reducing corporate cash holdings is heterogeneous; it plays a greater role in high long-term investment corporations than in low long-term investment corporations, in high investment opportunity corporations than in low investment opportunity corporations, and in duality corporations than in non-duality corporations. This study can help global investors understand China's culture and capital markets and will be the first step toward exploring the economic impact of red culture.

8.
Eye (Lond) ; 37(6): 1264-1270, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-35610360

RESUMO

PURPOSE: Increasing evidence suggests myopia is not a simple refractive error, many other factors might also be involved. Here, we assessed myopic and normal corneas' gene expression profiles to identify possible diagnostic and therapeutic biomarkers for myopia. MATERIALS AND METHODS: We obtained the expression profile of ten patients and seven normal control samples from the GSE112155 and GSE151631 datasets based on the Gene Expression Omnibus (GEO) database. We used the "limma" R package to determine the differentially expressed genes (DEGs) between myopic and normal corneas. Weighted gene co-expression network analysis (WGCNA) was used to identify critical co-expressed modules related to myopia, and enrichment analyses were used to annotate the function of genes encompassed in the compulsory module. We also validated these findings in two external datasets (GSE24641 and GSE136701). RESULTS: We identified that the DEGs were significantly enriched in ultraviolet (UV) response, TNF-α signaling via NFκB, Angiogenesis, Myogenesis pathways, etc. We used 2095 genes to construct the co-expression gene modules and found five interesting modules because the eigengene expression of these modules was significantly differentially expressed between myopic and normal corneas. Notably, the enrichment analysis found that the genes encompassed in lightgreen module were significantly enriched in immune-related pathways. These findings were proved by subsequent analysis based on Xcell software. We found the component of B cells, CD4+ memory T cells, CD8+ central memory T cells, plasmacytoid dendritic cells, T helper 2 (Th2) cells, regulatory T cells (Tregs), etc. were significantly increased in myopic corneas, while CD8+ T cells, CD4+ T central memory cells, natural killer T (NKT) cells, and T helper 1 (Th1) cells were significantly decreased. CONCLUSION: Our findings identified some markers that might detect diagnosis and treatment for myopia from cornea aspect. Future studies are warranted to verify the functional role of immune-related pathways in cornea during the pathogenesis or progression of myopia.


Assuntos
Miopia , Erros de Refração , Humanos , Transcriptoma , Miopia/diagnóstico , Miopia/genética , Perfilação da Expressão Gênica , Biomarcadores
10.
Int Ophthalmol ; 42(3): 829-840, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34674085

RESUMO

PURPOSE: This study aimed to determine degree of postoperative pain and the incidence of serious postoperative pain after glaucoma surgery and further to identify the associated risk factors. METHODS: A total of 194 consecutive patients who were diagnosed with glaucoma and underwent glaucoma surgery were enrolled in this study. The intensity of postoperative pain was evaluated using numerical rating scale (NRS) within 24 h after surgery; NRS ≥ 5 was considered as clinically significant postoperative pain. Risk factors associated with the development of postoperative pain were analyzed by multivariate logistic regression analysis. RESULTS: Clinically significant postoperative pain was experienced at any time after glaucoma surgery in 41.75% of the patients, which peak at 2 h. 27.8% of the patients requested analgesic medication within 24 h after surgery. According to multivariate logistic regression analysis, preoperative anxiety (OR = 4.13 [1.29-13.2], p = 0.017), cyclophotocoagulation (OR = 30.9 [3.47-375.1], p = 0.002), and phacotrabeculectomy combined with or without intraocular lens implantation (OR = 30.0 [2.69-335.6], p = 0.006) were associated with increased clinically significant postoperative pain. Interestingly, patients with diabetes and/or hypertension were associated with less postoperative pain after glaucoma surgery (OR = 0.23 [0.08-0.64], p = 0.005). CONCLUSION: Patients undergoing glaucoma surgery tend to experience postoperative pain in the early postoperative period. Anxiety level and surgery types of cyclophotocoagulation and phacotrabeculectomy are risk factors for postoperative pain. Patients with diabetes and/or hypertension are less likely to develop postoperative pain.


Assuntos
Glaucoma , Trabeculectomia , Glaucoma/complicações , Humanos , Pressão Intraocular , Dor Pós-Operatória/epidemiologia , Dor Pós-Operatória/etiologia , Estudos Prospectivos , Estudos Retrospectivos , Fatores de Risco , Trabeculectomia/efeitos adversos
11.
Int J Ophthalmol ; 14(1): 106-111, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33469491

RESUMO

AIM: To identify the risk factors of epiphora in patients with anatomical patency after surgical repair of canalicular laceration. METHODS: This retrospective case series included 178 cases of canalicular laceration repair from 2005 to 2012. Demographic data collected from each patient included age, sex, type of injury, distance from the distal lacerated end of the canaliculus to the punctum, the severity score for the structural abnormity of the medial canthus, the duration of stent placement, and the timing of surgery. The risk factors for epiphora were evaluated using Logistic regression models. RESULTS: Among the 178 cases, 45 (25.3%) with lacrimal patency after irrigation had symptomatic epiphora at the final follow-up. Patients' sex, age, type of injury, duration of stent placement, timing of surgery, and concurrent trauma were not found to be significantly associated with symptomatic epiphora after surgical repair of the lacerated canaliculus (P>0.05). A distance of more than 5 mm from the distal cut end to the punctum was closely and significantly associated with symptomatic epiphora after surgical repair of the lacerated canaliculus (P<0.01). Symptomatic epiphora was significantly more frequent in patients with higher severity scores for structural abnormities of the medial canthus (P<0.01). CONCLUSION: Our results indicate that the risk factors for postoperative symptomatic epiphora include a further distance between the distal cut end and the lacrimal punctum and a higher severity score for structural abnormities of the medial canthus. These findings could be used to prognosticate postoperative symptomatic epiphora.

12.
Ophthalmic Plast Reconstr Surg ; 37(1): 27-32, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-32282646

RESUMO

PURPOSE: To prospectively explore the incidence and risk factors of moderate to severe pain after primary and secondary orbital implantation following evisceration or enucleation surgery. METHODS: One hundred eighteen patients under general anesthesia for orbital implantation were enrolled in this study. In 91 patients, primary orbital implantation followed evisceration, and in 27 patients, the implantation was secondary after previous evisceration or enucleation surgery. Medical interventions for all participants were followed by standardized surgical, anesthetic, and analgesic protocols. Postoperative pain (POP) intensity was quantified by an 11-point numerical rating scale within 72 hours after the surgery, numerical rating scale ≥4 was considered moderate to severe POP. Multivariate logistic regression was utilized to identify the risk factors related to the development of POP. RESULTS: Thirty-five patients (29.7%) displayed moderate to severe POP, particularly within 6 to 24 hours after surgery, which peaked at 24 hours. Of these patients, 26 patients who were unable to tolerate the pain received additional doses of analgesics during in-hospital stay. Logistic regression model revealed that preoperative anxiety (odds ratios = 4.890; p = 0.002), congenital microphthalmia (odds ratios = 14.602; p = 0.038), and surgical time longer than 60 minutes (odds ratios = 5.586; p = 0.001) were significantly associated with moderate to severe POP after orbital implantation. CONCLUSIONS: Orbital implantation after evisceration or enucleation surgery is likely to cause moderate to severe pain intensity in the early postoperative period. Preoperative anxiety, prolonged surgical time, and congenital microphthalmia were the risk factors.


Assuntos
Implantes Orbitários , Enucleação Ocular , Evisceração do Olho , Humanos , Incidência , Implantes Orbitários/efeitos adversos , Dor Pós-Operatória/diagnóstico , Dor Pós-Operatória/epidemiologia , Dor Pós-Operatória/etiologia , Estudos Retrospectivos , Fatores de Risco
13.
Int Immunopharmacol ; 88: 106989, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33182069

RESUMO

Retinal ischemia/reperfusion (I/R) occurs in various vision disabled ocular diseases, involved in acute glaucoma, diabetic retinopathy, ischemic optic neuropathy, hypertensive retinopathy and retinal vascular occlusion. Laquinimod (LQ), a new type of immunosuppressant, has been reported to exert anti-inflammatory effects on autoimmune diseases. This research aims to investigate the protective effect of LQ on I/R damage by focusing on inhibiting dysregulated neuroinflammation and neuronal apoptosis. In our study, mice were treated with LQ after high intraocular pressure (IOP)-induced retinal I/R injury. The data showed that LQ significantly attenuated high IOP-induced retinal ganglion cell (RGC) death and inner plexiform layer (IPL) thinning and inhibited microglial activation. The results of qRT-PCR, flow cytometry and Luminex multiplex assays demonstrated the anti-inflammatory action of LQ in BV2 cells stimulated with lipopolysaccharide (LPS). In addition, primary RGC apoptosis induced by oxygen-glucose deprivation/reperfusion (OGD/R) was also directly suppressed by LQ. Importantly, LQ inhibited the expression of cleaved caspase-8 and the downstream NLRP3 inflammasome and IL-1ß. In conclusion, our findings offer the first evidence that LQ treatment prevents retinal I/R damage. Furthermore, LQ could directly inhibit RGC apoptosis. Caspase-8 activation and subsequent inflammation can also be suppressed by LQ, which suggests that LQ may act through inhibiting the caspase-8 pathway. This study demonstrates a new mechanism of LQ and provides beneficial preclinical data for the clinical application of LQ.


Assuntos
Anti-Inflamatórios/farmacologia , Apoptose/efeitos dos fármacos , Quinolonas/farmacologia , Traumatismo por Reperfusão , Doenças Retinianas/tratamento farmacológico , Animais , Células Cultivadas , Citocinas/genética , Citocinas/metabolismo , Inflamação/tratamento farmacológico , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Retina/patologia , Doenças Retinianas/patologia , Neurônios Retinianos/efeitos dos fármacos , Vasos Retinianos
14.
Front Med (Lausanne) ; 7: 598056, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33244468

RESUMO

Background: Inflammation-induced angiogenesis plays a critical role in many eye diseases, and abnormal angiogenesis inhibition is regarded as a therapeutic approach. Here, we examined the effects of laquinimod on inflammatory corneal angiogenesis. Methods: Mouse model of corneal neovascularization was induced by NaOH. Laquinimod or control vehicle were topically applied to alkali-treated eyes twice a day for 10 days. Corneal neovascularization, infiltrating inflammatory cells, and the levels of chemokines, pro-inflammatory cytokines were assessed. RAW cells and human umbilical vein endothelial cells were used in vitro to further explore the underlying mechanisms of the effects of laquinimod on inflammation-induced angiogenesis. Results: Topical administration of laquinimod to the injured corneas dramatically inhibited alkali-induced corneal neovascularization and decreased inflammatory cell (such as macrophage) infiltration in a corneal injury mouse model. Laquinimod significantly downregulated the expression of chemokines (monocyte chemotactic protein-1 and macrophage inflammatory protein-1), pro-inflammatory cytokines (interleukin-1ß and tumor necrosis factor-alpha), vascular endothelial growth factor, nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing 3 and apoptosis-associated speck-like protein containing C-terminal caspase-recruitment domain adaptor protein in both injured corneas and RAW cells. In vitro, laquinimod also dramatically inhibited the proliferation, migration and tube formation of human umbilical vein endothelial cells. Conclusion: Laquinimod inhibits inflammation-induced angiogenesis in the cornea. These results suggest that laquinimod is a potential new therapeutic option for corneal neovascularization and other angiogenesis-associated diseases.

15.
Eye (Lond) ; 34(6): 1055-1062, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-31558826

RESUMO

OBJECTIVES: We studied the difference in the corneal biomechanical parameters of ptotic and fellow eyes in patients with congenital blepharoptosis. The correlations between corneal biomechanical parameters and demographic or ocular parameters, and the changes after surgery were also researched. METHODS: The corneal biomechanical parameters were measured by Corvis ST tonometry. The central corneal thickness (CCT), axial length (AL) and keratometry measurements were performed with LenStar LS900, and intraocular pressure (IOP) by non-contact applanation tonometry. The parameters were evaluated for the effect of ptosis and the relationship of corneal biomechanical parameters. These examinations were repeated 6 months after blepharoptosis surgery. RESULTS: Twenty-nine patients were enroled. The Corvis ST parameters (Deformation amplitude [DA], A1 times, and A1 velocity), CCT, IOP with NCT, IOP with corrected, differed significantly between ptotic and fellow eyes. CCT was significantly positively correlated with Length A1 and IOP with Corvis, and negatively correlated with IOP corrected by Corvis of the ptotic eyes. The same tendency was found in the fellow eyes. Six months after the ptosis surgery, the differences in corneal biomechanics parameters between ptotic eyes and fellow eyes were not significantly changed. CONCLUSIONS: Congenital blepharoptosis causes significant corneal biomechanical changes measured by Corvis ST. The ptotic eyes had thicker and less deformable corneas. The differences in corneal biomechanics between ptotic eyes and fellow eyes were mostly related to CCT changes. Six months after surgery, these differences in corneal biomechanics did not change significantly.


Assuntos
Blefaroptose , Fenômenos Biomecânicos , Blefaroptose/cirurgia , Córnea/cirurgia , Paquimetria Corneana , Humanos , Pressão Intraocular , Tonometria Ocular
16.
PLoS One ; 14(3): e0213489, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30830938

RESUMO

[This corrects the article DOI: 10.1371/journal.pone.0099719.].

17.
Oncol Lett ; 15(5): 7948-7954, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29725482

RESUMO

Metformin (Met) is a therapeutic agent for the treatment of type 2 diabetes mellitus. There is evidence that Met may reduce the risk of cancer in patients with type 2 diabetes mellitus by inhibiting tumor cell growth, prolonging the overall survival time in patients with various types of malignancy. However, the function and mechanism of Met have not been fully elucidated in osteosarcoma (OS). The present study evaluated the anti-proliferative effect of Met on MG63 and U2OS OS cells, identifying that it acted in a dose- and time-dependent manner. Met also inhibited OS cell migration and invasion, potentially by regulating the epithelial-mesenchymal transition in OS cells. Mechanistically, Met was demonstrated to partly exert these functions through the suppression of Akt phosphorylation, which was associated with increased phosphatase and tensin (PTEN) expression. Silencing PTEN prevented the Met-induced inhibition of the growth and metastasis of OS cells. As Met has anti-proliferative and anti-metastatic effects on OS cells it is a potential candidate, in combination with other chemotherapeutic agents, for use in the treatment of OS.

18.
J Mol Cell Biol ; 9(4): 289-301, 2017 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-28655163

RESUMO

Mesenchymal stem cells (MSCs) have been demonstrated to have promising therapeutic benefits for a variety of neurological diseases; however, the underlying mechanisms are poorly understood. Here, we showed that intravitreal infusion of MSCs promoted retinal ganglion cell (RGC) survival in a mouse model of acute glaucoma, with significant inhibition of microglial activation, production of TNF-α, IL-1ß, and reactive oxygen species, as well as caspase-8 and caspase-3 activation. In vitro, MSCs inhibited both caspase-8-mediated RGC apoptosis and microglial activation, partly via the action of stanniocalcin 1 (STC1). Furthermore, we found that microRNA-21a-5p (miR-21) and its target, PDCD4, were essential for STC1 production and the neuroprotective property of MSCs in vitro and in vivo. Importantly, miR-21 overexpression or PDCD4 knockdown augmented MSC-mediated neuroprotective effects on acute glaucoma. These data highlight a previously unrecognized neuroprotective mechanism by which the miR-21/PDCD4 axis induces MSCs to secrete STC1 and other factors that exert neuroprotective effects. Therefore, modulating the miR-21/PDCD4 axis might be a promising strategy for clinical treatment of acute glaucoma and other neurological diseases.


Assuntos
Proteínas Reguladoras de Apoptose/metabolismo , Glaucoma/terapia , Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais/citologia , MicroRNAs/metabolismo , Proteínas de Ligação a RNA/metabolismo , Células Ganglionares da Retina/citologia , Transdução de Sinais , Doença Aguda , Animais , Proteínas Reguladoras de Apoptose/genética , Sobrevivência Celular , Células Cultivadas , Modelos Animais de Doenças , Regulação para Baixo , Glaucoma/genética , Glaucoma/metabolismo , Glaucoma/patologia , Injeções Intravítreas , Masculino , Transplante de Células-Tronco Mesenquimais/métodos , Células-Tronco Mesenquimais/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , MicroRNAs/genética , Neuroproteção , Proteínas de Ligação a RNA/genética , Células Ganglionares da Retina/metabolismo , Células Ganglionares da Retina/patologia , Regulação para Cima
19.
Clin Interv Aging ; 11: 887-95, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27445467

RESUMO

OBJECTIVE: The aim of our study was to investigate the relationship among age, sex, body mass index (BMI), serum lipid profiles, blood glucose (BG), and bone mineral density (BMD), making an assessment of the risk of osteoporosis. MATERIALS AND METHODS: A total of 1,035 male and 3,953 female healthy volunteers (aged 41-95 years) were recruited by an open invitation. The basic information, including age, sex, height, weight, waistline, hipline, menstrual cycle, and medical history, were collected by a questionnaire survey and physical examination. Serum lipid profiles, BG, postprandial blood glucose, and glycosylated hemoglobin were obtained after 12 hours fasting. BMD in lumbar spine was measured by dual-energy X-ray absorptiometry scanning. RESULTS: The age-adjusted BMD in females was significantly lower than in males. With aging, greater differences of BMD distribution exist in elderly females than in males (P<0.001), and the fastigium of bone mass loss was in the age range from 51 to 55 in females and from 61 to 65 years in males. After adjustment for sex, there were significant differences in BMD among BMI-stratified groups in both males and females. The subjects with a BMI of <18.5 had a higher incidence of osteoporosis than BMI ≥18.5 in both sexes. BMD in type 2 diabetes mellitus with a BG of >7.0 mmol/L was lower than in people with BG of ≤7.0 mmol/L (P<0.001). People with serum high-density lipoprotein cholesterol levels of ≥1.56 mmol/L had a greater prevalence of osteoporosis compared with high-density lipoprotein cholesterol ≤1.55 mmol/L. Logistic regression with odds ratios showed that no association was found among total cholesterol, triglyceride, low-density lipoprotein cholesterol, glycosylated hemoglobin, postprandial blood glucose and BMD. CONCLUSION: The present study further confirmed that factors such as age, sex, weight, BMI, high-density lipoprotein cholesterol, and diabetes are significant predictors of osteoporosis in the Chinese people.


Assuntos
Glicemia , Índice de Massa Corporal , Densidade Óssea , Lipídeos/sangue , Osteoporose/epidemiologia , Absorciometria de Fóton , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Envelhecimento , Povo Asiático , Peso Corporal , Doenças Ósseas Metabólicas , Diabetes Mellitus Tipo 2 , Feminino , Hemoglobinas Glicadas , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Prevalência , Medição de Risco , Fatores Sexuais
20.
Clin Interv Aging ; 11: 445-52, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27143868

RESUMO

OBJECTIVE: People with type 2 diabetes are at an increased risk of hypertension, arteriosclerosis, heart disease, and stroke. Glucose intolerance (insulin resistance) is the main feature of type 2 diabetes. Obesity leads to insulin resistance, dyslipidemia, etc. The aim of this study was to assess the biochemical parameters and measures of obesity in type 2 diabetes mellitus (T2DM). METHODS: A total of 2,273 males and 6,547 females previously healthy volunteers (aged 41-95 years old) were recruited by open invitation. The basic information, including age, sex, height, weight, body mass index (BMI), waistline, hipline, menstrual cycle, and medical history, was collected by questionnaire survey and physical examination. Serum lipid profile, liver transaminase, blood glucose, postprandial blood glucose, and hemoglobin A1c were obtained after 12 hours of fasting. RESULTS: According to our results, diabetic patients presented serum lipid abnormality. Elevated triglyceride (TG) levels (≥1.7 mmol/L) were noted in 19.69% of males and 20.40% of females, and reduced high-density lipoprotein cholesterol (HDL-C) levels (≤1.15 mmol/L) were noted in 21.96% of males and 15.74% of females. The combination of elevated TG and reduced HDL-C was the most prevalent of the combined lipid abnormalities. In contrast, no differences were observed in the levels of low-density lipoprotein cholesterol and total cholesterol. Moreover, there were statistically significant differences in the levels of BMI and waistline between T2DM and non-T2DM participants. After adjustment for BMI, logistic regression analysis revealed that the subjects with BMI ≤20 kg/m(2) and >30 kg/m(2) had a significantly elevated hazard ratio of T2DM compared with participants having a BMI range of 20-30 kg/m(2) in both males and females. However, there was a significant difference between T2DM patients and non-T2DM patients in waistline (χ (2)=8.57, P<0.001) than in BMI parameter (χ (2)=6.29, P<0.001). CONCLUSION: The present study shows for the first time that low levels of HDL-C, high levels of TG, and abnormal levels in BMI and waistline increase the risk of type 2 T2DM in Chinese people.


Assuntos
Índice de Massa Corporal , HDL-Colesterol/sangue , Diabetes Mellitus Tipo 2/fisiopatologia , Dislipidemias/sangue , Triglicerídeos/sangue , Circunferência da Cintura , Idoso , Povo Asiático , Glicemia , Peso Corporal , China , Diabetes Mellitus Tipo 2/sangue , Feminino , Hemoglobinas Glicadas/análise , Humanos , Resistência à Insulina , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Medição de Risco
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA