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1.
Int J Mol Sci ; 24(5)2023 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-36902462

RESUMO

Currently, computed tomography and conventional X-ray radiography usually generate a micro-artifact around metal implants. This metal artifact frequently causes false positive or negative diagnoses of bone maturation or pathological peri-implantitis around implants. In an attempt to repair the artifacts, a highly specific nanoprobe, an osteogenic biomarker, and nano-Au-Pamidronate were designed to monitor the osteogenesis. In total, 12 Sprague Dawley rats were included in the study and could be chategorized in 3 groups: 4 rats in the X-ray and CT group, 4 rats in the NIRF group, and 4 rats in the sham group. A titanium alloy screw was implanted in the anterior hard palate. The X-ray, CT, and NIRF images were taken 28 days after implantation. The X-ray showed that the tissue surrounded the implant tightly; however, a gap of metal artifacts was noted around the interface between dental implants and palatal bone. Compared to the CT image, a fluorescence image was noted around the implant site in the NIRF group. Furthermore, the histological implant-bone tissue also exhibited a significant NIRF signal. In conclusion, this novel NIRF molecular imaging system precisely identifies the image loss caused by metal artifacts and can be applied to monitoring bone maturation around orthopedic implants. In addition, by observing the new bone formation, a new principle and timetable for an implant osseointegrated with bone can be established and a new type of implant fixture or surface treatment can be evaluated using this system.


Assuntos
Implantes Dentários , Osseointegração , Ratos , Animais , Osteogênese , Ratos Sprague-Dawley , Maxila , Próteses e Implantes , Titânio
2.
Gynecol Obstet Invest ; 80(2): 139-44, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25871638

RESUMO

The objective of this study is to present a rare case of pregnancy complicated with ovarian cancer managed by robotic surgery. A 36-year-old woman suffered from sudden onset of lower abdominal pain during her pregnancy at 14 weeks of gestation. As malignancy was highly suspected, left salpingo-oophorectomy, bilateral pelvic lymph node dissection, and omentectomy were performed by robotic approach. The uterus and fetus were preserved. After surgery, 5 courses of carboplatin and paclitaxel were given, and the patient was delivered by cesarean section at 37 weeks of pregnancy. Follow-up at 18 months showed no signs of cancer recurrence. As there is limited report of pregnancy complicated with ovarian cancer managed by robotic surgery, we provide this rare case and suggest that surgical staging for ovarian malignancy can be safely accomplished by robotic approach at 14 weeks of pregnancy.


Assuntos
Procedimentos Cirúrgicos em Ginecologia/métodos , Neoplasias Ovarianas/cirurgia , Complicações Neoplásicas na Gravidez/cirurgia , Robótica/métodos , Adulto , Feminino , Humanos , Gravidez , Resultado da Gravidez
3.
J Minim Access Surg ; 11(1): 87-93, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25598606

RESUMO

BACKGROUND: Currently, benefits of robotic surgery in patients with benign gynecological conditions remain unclear. In this study, we compared the surgical outcome of robotic and laparoscopic total hysterectomies and evaluated the feasibility of robotic surgery in cases with pelvic adhesions or large uterus. MATERIALS AND METHODS: A total of 216 patients receiving total hysterectomy via robotic or laparoscopic approach were included in this study. Of all 216 patients, 88 underwent robotic total hysterectomy and 128 underwent laparoscopic total hysterectomy. All cases were grouped by surgical type, adhesion score, and uterine weight to evaluate the interaction or individual effect to the surgical outcomes. The perioperative parameters, including operation time, blood loss, postoperative pain score, time to full diet resumption, length of hospital stay, conversion rate, and surgery-related complications were compared between the groups. RESULTS: Operation time and blood loss were affected by both surgical type and adhesion score. For cases with severe adhesions (adhesion score greater than 4), robotic surgery was associated with a shortened operation time (113.9 ± 38.4 min versus 164.3 ± 81.4 min, P = 0.007) and reduced blood loss (187.5 ± 148.7 mL versus 385.7 ± 482.6, P=0.044) compared with laparoscopy. Moreover, robotic group showed a lower postoperative pain score than laparoscopic group, as the effect was found to be independent of adhesion score or uterine weight. The grade-II complication rate was also found to be lower in the robotic group. CONCLUSIONS: Comparing to laparoscopic approach, robotic surgery is a feasible and potential alternative for performing total hysterectomy with severe adhesions.

4.
Int J Gynecol Cancer ; 24(6): 1105-11, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24927245

RESUMO

OBJECTIVE: The aim of this study was to compare the outcomes of robotic surgery, laparoscopy, and laparotomy for the surgical treatment of stage IA to IIB cervical cancer. METHODS: This retrospective study was carried out in a university-affiliated teaching hospital. A total of 100 women with an initial diagnosis of stage IA to IIB cervical cancer, without preoperative brachytherapy or chemotherapy, were included in this study. With selection of the cases, 44 patients received laparotomy surgery, 32 patients received laparoscopic surgery, and 24 patients received robotic surgery. The perioperative parameters measured included operation time, blood loss, transfusion rate, lymph node yield, adhesion score, laparotomy conversion rate, postoperative and 24-hour pain scores, time to full diet resumption, and hospital stay. The perioperative complication and disease-free survival were also evaluated. RESULTS: The robotic group showed a shorter operation time, less blood loss, lower transfusion rate, and lower laparotomy conversion rate than the laparoscopic or laparotomy group. As for the postoperative parameters, the robotic group showed reduced postoperative and 24-hour pain scores, shortened length of hospital stay, and decreased time to full diet resumption compared with the other 2 surgical groups. No significant differences were found between the groups in perioperative complication rate or disease-free survival. CONCLUSIONS: The data suggested that robotic surgery is a feasible and potentially optimal option for the treatment of stage IA to IIB cervical cancer with favorable short-term surgical outcomes.


Assuntos
Adenocarcinoma/cirurgia , Carcinoma de Células Escamosas/cirurgia , Laparoscopia , Laparotomia , Complicações Pós-Operatórias , Robótica , Neoplasias do Colo do Útero/cirurgia , Adenocarcinoma/mortalidade , Adenocarcinoma/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Escamosas/mortalidade , Carcinoma de Células Escamosas/patologia , Feminino , Seguimentos , Humanos , Histerectomia , Tempo de Internação/estatística & dados numéricos , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Estudos Retrospectivos , Taxa de Sobrevida , Neoplasias do Colo do Útero/mortalidade , Neoplasias do Colo do Útero/patologia
5.
J Cell Physiol ; 227(6): 2412-20, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21826655

RESUMO

Type II collagen is known to modulate chondrogenesis of mesenchymal stem cells (MSCs). In this study, MSCs from human bone marrow aspirates were used to study the modulating effects of type II collagen on MSC differentiation during the early stages of osteogenesis and adipogenesis. With osteogenic induction, MSCs cultured on the type II collagen-coated surface showed an enhanced calcium deposition level with increasing mRNA expressions of RUNX2, osteocalcin, and alkaline phosphatase. A synthetic integrin binding peptide, which specifically interacts with the I-domain of α(1)ß(1)/α(2)ß(1) integrins significantly blocks the mineralization-enhancing effect of type II collagen. MSCs attached on the type II collagen-coated plates exhibited expanded cell morphology with increasing spreading area, and the pretreatment of cells with integrin α(1)ß(1) or α(2)ß(1)-blocking antibody reduced the effect. The phosphorylation levels of FAK, ERK, and JNK significantly increased in the MSCs that attached on the type II collagen-coated plates. On the contrary, the mineralization-enhancing effect of type II collagen was diminished by JNK and MEK inhibitors. Furthermore, type II collagen blocked the adipogenic differentiation of MSCs, and this effect is rescued by JNK and MEK inhibitors. In conclusion, type II collagen facilitates osteogenesis and suppresses adipogenesis during early stage MSC differentiation. Such effects are integrin binding-mediated and conducted through FAK-JNK and/or FAK-ERK signaling cascades. These results inspire a novel strategy encompassing type II collagen in bone tissue engineering.


Assuntos
Adipogenia , Colágeno Tipo II/metabolismo , Células-Tronco Mesenquimais/metabolismo , Osteogênese , Adipogenia/efeitos dos fármacos , Adipogenia/genética , Idoso , Fosfatase Alcalina/genética , Biomarcadores/metabolismo , Cálcio/metabolismo , Adesão Celular , Forma Celular , Células Cultivadas , Subunidade alfa 1 de Fator de Ligação ao Core/genética , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Quinase 1 de Adesão Focal/metabolismo , Humanos , Integrina alfa1beta1/metabolismo , Integrina alfa2beta1/metabolismo , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , Células-Tronco Mesenquimais/efeitos dos fármacos , Osteocalcina/genética , Osteogênese/efeitos dos fármacos , Osteogênese/genética , Fosforilação , Inibidores de Proteínas Quinases/farmacologia , RNA Mensageiro/metabolismo , Transdução de Sinais , Fatores de Tempo , Regulação para Cima
6.
J Cell Physiol ; 226(8): 1981-8, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21520049

RESUMO

The limited source of healthy primary chondrocytes restricts the clinical application of tissue engineering for cartilage repair. Therefore, method to maintain or restore the chondrocyte phenotype during in vitro expansion is essential. The objective of this study is to establish the beneficial effect of ECM molecules on restoring the re-expression of cartilaginous markers in primary human chondrocytes after extensive monolayer expansion. During the course of chondrocyte serial expansion, COL2A1, SOX9, and AGN mRNA expression levels, and GAG accumulation level were reduced significantly in serially passaged cells. Exogenous type II collagen dose-dependently elevated GAG level and induced the re-expression of cartilaginous marker mRNAs in P7 chondrocytes. Chondroitin sulfate did not show significant effect on P7 chondrocytes, while hyaluronic acid inhibited the expression of SOX9 and AGN mRNAs. Upon treatment with type II collagen, FAK, ERK1/2, and JNK were activated via phosphorylation in P7 chondrocytes within 15 min. Furthermore, GFOGER integrin blocking peptide, MEK inhibitor and JNK inhibitor, not p38 inhibitor, significantly reduced the type II collagen-induced GAG deposition level. Finally, in the presence of TGF-ß1 and IGF-I, P7 chondrocytes cultured in 3D type II collagen matrix exhibited better cartilaginous features than those cells cultured in the type I collagen matrix. In conclusion, type II collagen alone can effectively restore cartilaginous features of expanded P7 human chondrocytes. It is probably mediated via the activation of FAK-ERK1/2 and FAK-JNK signaling pathways. The potential application of type II collagen in expanding a scarcity of healthy chondrocytes in vitro for further tissue engineering is implicated.


Assuntos
Cartilagem Articular/metabolismo , Condrócitos/metabolismo , Proteínas da Matriz Extracelular/metabolismo , Animais , Biomarcadores/metabolismo , Cartilagem Articular/efeitos dos fármacos , Células Cultivadas , Condrócitos/efeitos dos fármacos , Sulfatos de Condroitina/metabolismo , Colágeno Tipo II/biossíntese , Colágeno Tipo II/metabolismo , Humanos , Ácido Hialurônico/metabolismo , Fator de Crescimento Insulin-Like I/metabolismo , Integrinas/antagonistas & inibidores , MAP Quinase Quinase 4/antagonistas & inibidores , MAP Quinase Quinase Quinases/antagonistas & inibidores , Ratos , Fatores de Transcrição SOX9/biossíntese , Engenharia Tecidual , Fator de Crescimento Transformador beta/metabolismo
7.
J Vis Exp ; (156)2020 02 16.
Artigo em Inglês | MEDLINE | ID: mdl-32116301

RESUMO

A molecular imaging probe comprising superparamagnetic iron oxide (SPIO) nanoparticles and Mycobacterium tuberculosis surface antibody (MtbsAb) was synthesized to enhance imaging sensitivity for extrapulmonary tuberculosis (ETB). An SPIO nanoprobe was synthesized and conjugated with MtbsAb. The purified SPIO-MtbsAb nanoprobe was characterized using TEM and NMR. To determine the targeting ability of the probe, SPIO-MtbsAb nanoprobes were incubated with Mtb for in vitro imaging assays and injected into Mtb-inoculated mice for in vivo investigation with magnetic resonance (MR). The contrast enhancement reduction on magnetic resonance imaging (MRI) of Mtb and THP1 cells showed proportional to the SPIO-MtbsAb nanoprobe concentration. After 30 min of intravenous SPIO-MtbsAb nanoprobe injection into Mtb-infected mice, the signal intensity of the granulomatous site was enhanced by 14-fold in the T2-weighted MR images compared with that in mice receiving PBS injection. The MtbsAb nanoprobes can be used as a novel modality for ETB detection.


Assuntos
Dextranos/síntese química , Nanopartículas de Magnetita/química , Tuberculose/diagnóstico , Animais , Anticorpos Antibacterianos/imunologia , Compostos Férricos , Humanos , Injeções Intravenosas , Imageamento por Ressonância Magnética , Nanopartículas de Magnetita/ultraestrutura , Camundongos Endogâmicos C57BL , Mycobacterium tuberculosis/imunologia , Tamanho da Partícula , Células THP-1 , Tuberculose/imunologia , Tuberculose/microbiologia , Tuberculose/patologia
8.
Sci Rep ; 10(1): 2580, 2020 02 13.
Artigo em Inglês | MEDLINE | ID: mdl-32054952

RESUMO

A precise imaging technique to evaluate osteogenesis, osteodifferentiation, and osseointegration following peri-implant surgery is in high clinical demand. Herein, we report the generation of two new, near-infrared (NIR) fluorescent probes for use in the molecular imaging of bone repair. The first probe aims to monitor the in vitro differentiation of human mesenchymal stem cells (MSCs) into osteoblasts. A NIR fluorochrome was conjugated to a cyclic peptide that binds to integrin α5ß1, a factor that promotes osteogenesis in MSCs and therefore functioned as an osteoblast-specific marker. The second probe aims to monitor osteogenesis, and was generated by conjugating the drug pamidronate to a NIR fluorescent gold nanocluster. Pamidronate specifically binds to hydroxyapatite (HA), a mineral present in bone that is produced by osteoblasts, and therefore provides a functional marker for new bone formation. Our results show that both probes bind to their specific targets in vitro-differentiated osteoblasts, and not to undifferentiated MSCs, and emit NIR fluorescence for functional detection. This in vitro work demonstrates the ability of these probes to bind to active osteoblasts and their mineral deposits and highlight their potential utility as clinical tools for the imaging of the osseointegration process at the molecular level.


Assuntos
Osso e Ossos/diagnóstico por imagem , Corantes Fluorescentes/farmacologia , Imagem Molecular , Osteogênese/efeitos dos fármacos , Desenvolvimento Ósseo/efeitos dos fármacos , Osso e Ossos/metabolismo , Diferenciação Celular/efeitos dos fármacos , Durapatita/metabolismo , Corantes Fluorescentes/metabolismo , Humanos , Integrina alfa5beta1/química , Integrina alfa5beta1/genética , Células-Tronco Mesenquimais/efeitos dos fármacos , Osseointegração/efeitos dos fármacos , Osteoblastos/efeitos dos fármacos , Pamidronato/farmacologia , Tomografia Computadorizada por Raios X
10.
Am J Sports Med ; 46(3): 713-727, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29211970

RESUMO

BACKGROUND: Insufficient cell numbers still present a challenge for articular cartilage repair. Converting heterotopic auricular chondrocytes by extracellular matrix may be the solution. HYPOTHESIS: Specific extracellular matrix may convert the phenotype of auricular chondrocytes toward articular cartilage for repair. STUDY DESIGN: Controlled laboratory study. METHODS: For in vitro study, rabbit auricular chondrocytes were cultured in monolayer for several passages until reaching status of dedifferentiation. Later, they were transferred to chondrogenic type II collagen (Col II)-coated plates for further cell conversion. Articular chondrogenic profiles, such as glycosaminoglycan deposition, articular chondrogenic gene, and protein expression, were evaluated after 14-day cultivation. Furthermore, 3-dimensional constructs were fabricated using Col II hydrogel-associated auricular chondrocytes, and their histological and biomechanical properties were analyzed. For in vivo study, focal osteochondral defects were created in the rabbit knee joints, and auricular Col II constructs were implanted for repair. RESULTS: The auricular chondrocytes converted by a 2-step protocol expressed specific profiles of chondrogenic molecules associated with articular chondrocytes. The histological and biomechanical features of converted auricular chondrocytes became similar to those of articular chondrocytes when cultivated with Col II 3-dimensional scaffolds. In an in vivo animal model of osteochondral defects, the treated group (auricular Col II) showed better cartilage repair than did the control groups (sham, auricular cells, and Col II). Histological analyses revealed that cartilage repair was achieved in the treated groups with abundant type II collagen and glycosaminoglycans syntheses rather than elastin expression. CONCLUSION: The study confirmed the feasibility of applying heterotopic chondrocytes for cartilage repair via extracellular matrix-induced cell conversion. CLINICAL RELEVANCE: This study proposes a feasible methodology to convert heterotopic auricular chondrocytes for articular cartilage repair, which may serve as potential alternative sources for cartilage repair.


Assuntos
Cartilagem Articular/cirurgia , Condrócitos/transplante , Articulação do Joelho/cirurgia , Engenharia Tecidual , Animais , Células Cultivadas , Condrogênese , Colágeno Tipo II/metabolismo , Pavilhão Auricular/citologia , Matriz Extracelular/metabolismo , Glicosaminoglicanos/metabolismo , Hidrogéis , Coelhos
11.
PLoS One ; 13(2): e0192047, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29390034

RESUMO

Epithelial ovarian cancer (EOC) is the seventh most common cancer among women worldwide. The 5-year survival rate for women with EOC is only 30%-50%, which is largely due to the typically late diagnosis of this condition. EOC is difficult to detect in its early stage because of its asymptomatic nature. Recently, near-infrared fluorescent (NIRF) imaging has been developed as a potential tool for detecting EOC at the molecular level. In this study, a NIRF-sensitive probe was designed to detect matrix metalloproteinase (MMP) activity in ovarian cancer cells. A cyanine fluorochrome was conjugated to the amino terminus of a peptide substrate with enzymatic specificity for MMP-3. To analyze the novel MMP-3 probe, an in vivo EOC model was established by subcutaneously implanting SKOV3 cells, a serous-type EOC cell line, in mice. This novel MMP-3-sensitive probe specifically reacted with only the active MMP-3 enzyme, resulting in a significantly enhanced NIRF emission intensity. Histological analysis demonstrated that MMP-3 expression and activity were enhanced in the stromal cells surrounding the ovarian cancer cells. These studies establish a molecular imaging reporter for diagnosing early-stage EOC. Additional studies are required to confirm the early-stage activity of MMP-3 in EOC and its diagnostic and prognostic significance.


Assuntos
Corantes Fluorescentes/química , Metaloproteinase 3 da Matriz/metabolismo , Imagem Óptica , Neoplasias Ovarianas/diagnóstico por imagem , Espectroscopia de Luz Próxima ao Infravermelho/métodos , Animais , Linhagem Celular Tumoral , Técnicas de Cocultura , Feminino , Xenoenxertos , Humanos , Camundongos , Neoplasias Ovarianas/metabolismo , Neoplasias Ovarianas/patologia
13.
PLoS One ; 13(5): e0196779, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29746554

RESUMO

Cartilage has limited self-repair ability. The purpose of this study was to investigate the effects of different species of collagen-engineered neocartilage for the treatment of critical-size defects in the articular joint in a rabbit model. Type II and I collagen obtained from rabbits and rats was mixed to form a scaffold. The type II/I collagen scaffold was then mixed with rabbit chondrocytes to biofabricate neocartilage constructs using a rotating cell culture system [three-dimensional (3D)-bioreactor]. The rabbit chondrocytes were mixed with rabbit collagen scaffold and rat collagen scaffold to form neoRBT (neo-rabbit cartilage) and neoRAT (neo-rat cartilage) constructs, respectively. The neocartilage matrix constructs were implanted into surgically created defects in rabbit knee chondyles, and histological examinations were performed after 2 and 3 months. Cartilage-like lacunae formation surrounding the chondrocytes was noted in the cell cultures. After 3 months, both the neoRBT and neoRAT groups showed cartilage-like repair tissue covering the 5-mm circular, 4-mm-deep defects that were created in the rabbit condyle and filled with neocartilage plugs. Reparative chondrocytes were aligned as apparent clusters in both the neoRAT and neoRBT groups. Both neoRBT and neoRAT cartilage repair demonstrated integration with healthy adjacent tissue; however, more integration was obtained using the neoRAT cartilage. Our data indicate that different species of type II/I collagen matrix and 3D bioreactor cultivation can facilitate cartilage engineering in vitro for the repair of critical-size defect.


Assuntos
Osso e Ossos/metabolismo , Cartilagem Articular/metabolismo , Cartilagem Articular/fisiologia , Condrogênese/fisiologia , Colágeno Tipo II/metabolismo , Colágeno Tipo I/metabolismo , Articulação do Joelho/metabolismo , Animais , Reatores Biológicos , Osso e Ossos/fisiologia , Condrócitos/metabolismo , Condrócitos/fisiologia , Articulação do Joelho/fisiologia , Coelhos , Ratos , Engenharia Tecidual/métodos , Alicerces Teciduais , Cicatrização/fisiologia
14.
Materials (Basel) ; 10(8)2017 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-28792464

RESUMO

A previous study demonstrated that the reconstituted type I collagen matrix extracted from rabbit tendons enabled the TMJ disc to regenerate in the rabbit. The aim of this study was to investigate changes in the extracellular matrix (ECM) and mechanisms of regeneration in the TMJ disc. In 36 New Zealand rabbits that underwent a partial discectomy, discs were replaced with reconstituted collagen templates for 3 months. A histological analysis showed that moderate to severe degeneration appeared in partially discectomized joints without implantation. In contrast, discs experienced regeneration of reconstituted collagen template implantation and the joint returned to normal function. Cells in the regenerative tissue expressed ECM, and fibers became regular and compact due to tissue remodeling over time. Reparative cells differentiated into chondroblasts, and showed highly dense pericellular fibers. The morphology and collagen composition of the disc and condyle in the 3-month experimental group were similar to those of normal tissues. In conclusion, the reconstituted collagen template facilitated the regeneration of surgically discectomized discs. Type I and type II collagens play a crucial role in the regeneration of articular discs.

15.
Am J Sports Med ; 45(13): 3128-3142, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28892654

RESUMO

BACKGROUND: To avoid complicated procedures requiring in vitro chondrocyte expansion for cartilage repair, the development of a culture-free, 1-stage approach combining platelet-rich fibrin (PRF) and autologous cartilage grafts may be the solution. PURPOSE: To develop a feasible 1-step procedure to combine PRF and autologous cartilage grafts for articular chondral defects. STUDY DESIGN: Controlled laboratory study Methods: The chemotactic effects of PRF on chondrocytes harvested from the primary culture of rabbit cartilage were evaluated in vitro and ex vivo. The rabbit chondrocytes were cultured with different concentrations of PRF media and evaluated for their cell proliferation, chondrogenic gene expression, cell viability, and extracellular matrix synthesis abilities. For the in vivo study, the chondral defects were created on established animal models of rabbits. The gross anatomy, histology, and objective scores were evaluated to validate the treatment results. RESULTS: PRF improved the chemotaxis, proliferation, and viability of the cultured chondrocytes. The gene expression of the chondrogenic markers, including type II collagen and aggrecan, revealed that PRF induced the chondrogenic differentiation of cultured chondrocytes. PRF increased the formation and deposition of the cartilaginous matrix produced by cultured chondrocytes. The efficacy of PRF on cell viability was comparable with that of fetal bovine serum. In animal disease models, morphologic, histological, and objectively quantitative evaluation demonstrated that PRF combined with cartilage granules was feasible in facilitating chondral repair. CONCLUSION: PRF enhances the migration, proliferation, viability, and differentiation of chondrocytes, thus showing an appealing capacity for cartilage repair. The data altogether provide evidence to confirm the feasibility of 1-stage, culture-free method of combining PRF and autologous cartilage graft for repairing articular chondral defects. CLINICAL RELEVANCE: The single-stage, culture-free method of combining PRF and autologous cartilage is useful for repairing articular chondral defects. These advantages benefit clinical translation by simplifying and potentiating the efficacy of autologous cartilage transplantation.


Assuntos
Cartilagem Articular/cirurgia , Condrócitos/transplante , Fibrina Rica em Plaquetas , Agrecanas/genética , Animais , Diferenciação Celular , Movimento Celular , Proliferação de Células , Sobrevivência Celular , Células Cultivadas , Condrócitos/citologia , Condrogênese/genética , Colágeno Tipo II/genética , Expressão Gênica , Modelos Animais , Coelhos , Transplante Autólogo
16.
Taiwan J Obstet Gynecol ; 55(5): 650-653, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27751410

RESUMO

OBJECTIVE: To examine the alteration in the cellular dynamics of the urethral tissue after a simulated birth trauma in a mouse model. MATERIALS AND METHODS: A total of 36 B6 mice received vaginal distention treatment, and four untreated mice were used as controls. Specimens were collected every 24 hours after the injury for 9 consecutive days and examined using immunofluorescent staining for cell markers including c-kit, smooth muscle actin (SMA), and vimentin. Confocal microscopy was used to localize the stained cells and determine the cell number. RESULTS: The number of c-kit positive cells increased after the 1st day and peaked on the 3rd day. The amount of SMA positive cells rapidly reduced to its lowest count on the 1st day and maintained a statistically significant low cell number than that at the basal level for 4 days after vaginal distension. The cell number finally returned to basal level on the 9th day. The amount of vimentin positive cells increased dramatically after the 1st day and plateaued from the 3rd day to the 9th day. The number of vimentin positive cells in the plateau phase was significantly higher than that of the control group. CONCLUSION: Our study confirmed that the dynamic change in different cell types after the urethral injury was dependent on the nature and physiology of the wound repairing cells during the tissue healing process. It might be a simple animal model to study birth trauma repair; however, the varied progenitor cell activity in different species should also be considered.


Assuntos
Traumatismos do Nascimento/patologia , Prenhez , Células-Tronco/patologia , Uretra/patologia , Incontinência Urinária por Estresse/patologia , Animais , Animais Recém-Nascidos , Traumatismos do Nascimento/complicações , Contagem de Células , Modelos Animais de Doenças , Feminino , Camundongos , Camundongos Endogâmicos C57BL , Microscopia Confocal , Gravidez , Incontinência Urinária por Estresse/etiologia
17.
Int J Med Robot ; 12(2): 268-75, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25808671

RESUMO

BACKGROUND: The purpose of this study was to evaluate the feasibility of robotic surgery and compare its surgical outcomes with those of laparoscopic surgery and laparotomy, with regard to performing staging surgery to manage ovarian cancer. METHODS: One hundred and thirty-eight women who received surgical staging procedures for treatment of stage IA-IIIC epithelial ovarian cancer and borderline tumours were retrospectively included in the study. All enrolled cases were reviewed for patient demographics, peri-operative parameters, complications and survival. RESULTS: The operation time and blood loss was significantly reduced in the robotic and laparoscopic groups. Moreover, robotic surgery was associated with decreased postoperative pain score. The length of hospital stay and time to full diet resumption were also shortened for those who underwent robotic and laparoscopic procedures. Survival analysis and complication rates were similar between the two groups. CONCLUSION: Robotic surgery is a feasible alternative in managing ovarian cancer as long as there is careful consideration given to patient selection. Copyright © 2015 John Wiley & Sons, Ltd.


Assuntos
Laparoscopia/métodos , Laparotomia/métodos , Neoplasias Epiteliais e Glandulares/cirurgia , Neoplasias Ovarianas/cirurgia , Procedimentos Cirúrgicos Robóticos/métodos , Cirurgia Assistida por Computador/métodos , Adulto , Carcinoma Epitelial do Ovário , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Neoplasias Epiteliais e Glandulares/diagnóstico , Neoplasias Ovarianas/diagnóstico , Período Pós-Operatório , Estudos Retrospectivos , Resultado do Tratamento
18.
Int J Surg ; 13: 17-22, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25463760

RESUMO

INTRODUCTION: Robotic surgery has been applied in managing various types of gynecologic cancers. The purpose of this study is to compare the surgical outcomes of robotic surgery, laparoscopy and laparotomy for managing endometrial cancer. METHODS: A total of 365 patients received surgical staging for treating IA to IIIC endometrial cancer were retrospectively enrolled. Patient demography, peri-operative parameters, and survival outcomes were studied. RESULTS AND DISCUSSIONS: Robotic surgery showed a significant lower blood loss and 24-h pain score as compared to other surgical types. Moreover, compared to laparotomy, robotic and laparoscopic surgeries were associated with reduced operation time, decreased time to full diet resumption, and shortened hospital stay. No significant differences were found between the groups in terms of overall complication rate. Eighteen-month follow-up of the patients indicated no significant differences in disease-free survival and overall survival. CONCLUSION: Compared to conventional approaches, robotic surgery showed favorable short-term outcomes with comparable survival. It is suggested that robotic surgery is a feasible tool for endometrial cancer management.


Assuntos
Neoplasias do Endométrio/cirurgia , Laparoscopia , Robótica , Adulto , Idoso , Perda Sanguínea Cirúrgica/estatística & dados numéricos , Intervalo Livre de Doença , Neoplasias do Endométrio/mortalidade , Feminino , Humanos , Laparotomia , Pessoa de Meia-Idade , Dor Pós-Operatória/epidemiologia , Estudos Retrospectivos , Robótica/métodos , Resultado do Tratamento
19.
Biomaterials ; 35(9): 2680-91, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24411332

RESUMO

The function of type II collagen in cartilage is well documented and its importance for long bone development has been implicated. However, the involvement of type II collagen in bone marrow derived mesenchymal stem cell (BMSC) osteogenesis has not been well investigated. This study elucidated the pivotal role of type II collagen in BMSC osteogenesis and its potential application to bone healing. Type II collagen-coated surface was found to accelerate calcium deposition, and the interaction of osteogenic medium-induced BMSCs with type II collagen-coated surface was mainly mediated through integrin α2ß1. Exogenous type II collagen directly activated FAK-JNK signaling and resulted in the phosphorylation of RUNX2. In a segmental defect model in rats, type II collagen-HA/TCP-implanted rats showed significant callus formation at the reunion site, and a higher SFI (sciatic function index) scoring as comparing to other groups were also observed at 7, 14, and 21 day post-surgery. Collectively, type II collagen serves as a better modulator during early osteogenic differentiation of BMSCs by facilitating RUNX2 activation through integrin α2ß1-FAK-JNK signaling axis, and enhance bone defect repair through an endochondral ossification-like process. These results advance our understanding about the cartilaginous ECM-BMSC interaction, and provide perspective for bone defect repair strategies.


Assuntos
Diferenciação Celular/efeitos dos fármacos , Colágeno Tipo II/farmacologia , Fêmur/patologia , Células-Tronco Mesenquimais/citologia , Osteogênese/efeitos dos fármacos , Actinas/metabolismo , Adulto , Idoso , Animais , Biomarcadores/metabolismo , Células da Medula Óssea/citologia , Cálcio/metabolismo , Fosfatos de Cálcio/farmacologia , Forma Celular/efeitos dos fármacos , Galinhas , Subunidade alfa 1 de Fator de Ligação ao Core/genética , Subunidade alfa 1 de Fator de Ligação ao Core/metabolismo , Durapatita/farmacologia , Fêmur/efeitos dos fármacos , Humanos , Integrina alfa2beta1/metabolismo , Masculino , Pessoa de Meia-Idade , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Ratos , Ratos Sprague-Dawley , Transdução de Sinais/efeitos dos fármacos , Cicatrização/efeitos dos fármacos
20.
Taiwan J Obstet Gynecol ; 52(1): 85-9, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-23548225

RESUMO

OBJECTIVE: The aim of our study was to assess the long-term efficacy of conservative surgery combined with gonadotropin-releasing hormone agonist therapy for uterine adenomyoma. MATERIALS AND METHODS: We carried out an uncontrolled descriptive study of 285 women who had symptomatic uterine adenomyoma. A total of 186 women with pathologically proven adenomyoma underwent ultramini-laparoscopic adenomyomectomy and a 6-month course of goserelin acetate treatment, and were evaluated semi-annually during a follow-up period of at least 3 years. RESULTS: Patient scores for dysmenorrhea using a self-reported six-point verbal numeric rating scale significantly declined compared with the baseline assessment, from 3.84 ± 0.65 to 0.33 ± 0.57, 0.52 ± 0.86, and 0.88 ± 1.29 at the end of the 1-, 2-, and 3-year follow-up visits, respectively (p < 0.001). Similar reductions were observed for analgesic usage scores. Menorrhagia scores significantly decreased compared with the baseline assessment, from 3.45 ± 1.46 to 0.42 ± 0.59, 0.65 ± 0.83, and 1.1 ± 1.34 at the end of the 1-, 2-, and 3-year follow-up visits, respectively (p < 0.001). CONCLUSION: Combination therapy for adenomyoma provides an effective treatment option for long-term symptom control and uterine preservation in severely symptomatic women for whom previous long-term drug therapy has failed or proven to be intolerable.


Assuntos
Adenomioma/terapia , Antineoplásicos Hormonais/uso terapêutico , Gosserrelina/uso terapêutico , Laparoscopia , Neoplasias Uterinas/terapia , Útero/cirurgia , Adenomioma/complicações , Adolescente , Adulto , Quimioterapia Adjuvante , Esquema de Medicação , Dismenorreia/etiologia , Feminino , Seguimentos , Humanos , Estimativa de Kaplan-Meier , Menorragia/etiologia , Pessoa de Meia-Idade , Índice de Gravidade de Doença , Resultado do Tratamento , Neoplasias Uterinas/complicações , Adulto Jovem
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