Squamous cell carcinoma, which originates from squamous epithelium or tissue that undergoes squamous epithelial metaplasia, is one of the most common pathological types of solid human carcinoma. Although squamous cell carcinoma can occur in different anatomical locations, its pathogenesis has commonalities and distinctive features. Genetic mutations and abnormal expression of squamous differentiation markers, epigenetic modifications regulating target gene expression, and tumor microenvironment inducing immune escape of cancer cells are all involved in the development of squamous cell carcinoma. At present, great progress has been made in the research on the pathogenesis of squamous cell carcinoma. This article, combined with relevant research in recent years, reviews the pathogenesis of squamous cell carcinoma in terms of genome changes, epigenetic changes, non coding RNA regulation, tumor microenvironment changes and risk factor induction, so as to provide reference for the prevention and treatment of squamous cell carcinoma.

How to promote high-quality wound healing is a common problem for plastic surgery and burn physicians. In recent years, numerous animal studies have demonstrated that mesenchymal stem cell-derived exosomes promote wound repair through multiple mechanisms and are promising cell-free therapeutic agents with broad prospect of application. How to enhance the therapeutic efficacy of exosomes, optimize their drug delivery strategy, and improve their biological properties are the challenges to be overcome in order to move from basic research to clinical application of exosome therapy for wound repair. This article focuses on methods to improve the wound repair potential of mesenchymal stem cell-derived exosomes, and reviews the recent research advances on improving the therapeutic efficacy of mesenchymal stem cell-derived exosomes in wound repair from three aspects, including pretreatment of parental mesenchymal stem cells, hydrogel bio-scaffold loaded with exosomes, and engineered exosomes, to provide a reference for further clinical studies.

The role of the subchondral bone in the pathophysiological processes of knee osteoarthritis(KOA)is receiving increasing attention.During the early stages of KOA,micro-fractures due to stress occurr with increased subchondral bone remodeling and decreased subchondral bone structural parameters,promoting the development of local microcirculatory disorders and atypical bone marrow lesions(BMLs).The micro-pores in cartilage provide pathways for blood vessel invasion into the deep layers of articular cartilage and subsequently bring in cartilage-degrading enzymes.With the pathogenesis of KOA,the loss of proteoglycans,which resist pressure to maintain the integrity of articular cartilage,results in stress overloading and then metabolic imbalances,leading to decreased bone resorption and increased bone formation.In the late stages of KOA,significant subchondral bone sclerosis further obstructs local blood microcirculation,which manifests as extended BMLs or increased signal intensity and even subchondral bone cysts.The acidic local environment impairs osteoblast function and erodes bone strength,contributing to subchondral bone collapse.Consequently,there is continued loss of the attached articular cartilage because of the positive feedback.Drug or surgical treatment aimed at cartilage protection should focus on functional modulation of osteoblasts and/or osteoclasts in the subchondral bone and the internal environment at different stages,instead of merely on the protection of articular cartilage.

Objective To investigate the X-ray gray scale changes of calcium sulfate and evaluate its clini-cal effect in traumatic fracture treatment. Methods 23 traumatic fracture cases were treated from September 2014 to January 2016 in our hospital. The degradation rate of calcium sulfate was evaluated by X ray assay. Results Af-ter surgery,about 69%remnants at 1 week,53%remnants at 2 weeks,26%remnants at 4 weeks,7%remnants at 6 weeks were observed,while no remnants were found at 8 weeks after surgery. The initial time window of callus appearance was 3 to 9 weeks and the mean time was(6.5 ± 1.6)weeks. The fracture union time was 8 to 24 weeks and the mean time was(15.0 ± 5.2)weeks. One patient with distal humeral comminuted fracture had non-infec-tious delayed healing wound.One case of hemolytic staphylococcus in incision was cultured. Conclusion Calcium sulfate degrades rapidly,cautions should be taken for the application in the superficial bone.

Objective To evaluate the clinical efficacy of extraperitoneal laparoscopic radical prostatectomy(ELRP)for prostate cancer patients, and to summarize the experience of surgical treatment. Methods The clinical data of 50 prostate cancer patients who underwent ELRP by the same performer from January 2010 to June 2015 were retrospectively reviewed. Results All cases were all successfully completed ,no case was converted to open surgery. The average operation time was 238.8 min,average operative blood loss was 409.1 mL,and intraoperative or postopera?tive blood transfusion was 6(12%). The mean postoperative catheterization time was 23.7(17?38)d. The mean postoperative hospital stay was 15 (10?34)d. The postoperative recovery time of eating was 2?4 d,and the ambulation time was 1?3 d. Totally 3 cases(6%)had lymph node metasta?sis,and 7 cases(14%)had positive surgical margin. Totally 9 cases(18%)had surgery?related complication. Patients were followed up for 6 to 58 months,with an average of 12.5 months. One case(2%)had biochemical recurrence,and the tumor?free survival rate was 84%. At the end of fol?low?up,all of the patients were continent. Conclusion ELRP is safe and effective for the treatment of prostate cancer. With the development of minimally invasive techniques,the applications of RP are increasingly widespread. However,large?scale and long?term follow?up studies are still needed for high?risk prostate cancer patients.

Objective To assess the efficacy of dorsal vein complex(DVC)ligation free in laparoscopic radical prostatectomy. Methods The data of 25 patients underwent laparoscopic radical prostatectomy that performed by the same surgeon in our hospital from January 2012 to January 2014 were retrospectively analyzed. Among them,14 cases underwent sutured DVC,11 cases received sutured DVC. Results All the operations were completed with laparoscope and without convert to open surgery. The mean operation time was 246±24.7 min and 236±26.1 min in DVC liga?tion and DVC ligation free,the blood loss was 337.5±120.2 mL and 322.2±104.9 mL in DVC ligation and DVC ligation free,the blood transfusion rate was 14.3%and 18.2%in DVC ligation and DVC ligation free ,the urinary incontinence rate of 6 months after operation was 21.4%and 9.1%in DVC ligation and DVC ligation free,no significant difference was found in the operation time,blood loss,blood transfusion rate and urinary in?continence rate among the two groups(P>0.05). Conclusion DVC ligation free is a safe and effective technique during laparoscopic radical prostatectomy and may simplify the operative procedure and without increase of the risk of bleeding ,which can be more conducive to the early re?covery of postoperative urinary control.

OBJECTIVE: To explore the correlation between diabetic nephropathy (DN) and cognitive impairment through examining the cognitive function and the metabolism of the cerebrum in Type 2 diabetes mellitus patients at different stages of renal function.
 METHODS: Eighty six patients with Type 2 diabetes mellitus (T2DM) were enrolled for this study. According to the urinary albumin excretion rate (UAER), the patients were divided into a T2DM without DN group (DM group, n=33), an early DN group (DN-III group, n=26) and a clinical stage group (DN-IV group, n=27). Thirty healthy adults were selected as a control group (NC group). Biochemical indexes and UAER were measured, and glomerular filtration rate (GFR) was detected by single-photon emission computed tomography (SPECT). The cognitive function was measured by Montreal Cognitive Assessment (MoCA, Beijing version) and mini-mental state examination (MMSE). The peak areas of N-acetylasparte (NAA), creatine (Cr), choline-containing compounds (Cho) were detected by proton magnetic resonance spectroscopy (1H-MRS).
 RESULTS: 1) There was no statistical difference in MMSE scores between the DM group and the control group. The scores of MoCA in the DN-III group or in the DN-IV group were significant less than that in the NC group (F=3.66, P<0.05); 2) There was significant difference in left N-acetylaspartate (LNAA), left choline (LCho) among the diabetes groups. Compared with the DM group, the level of LNAA was decreased significantly (t=3.826, P<0.05) while the LCho was increased significantly (t=4.373, P<0.05) in the DN groups, with statistic difference between the 2 groups (t=3.693, P<0.05); 3) The MoCA scores of T2DM patients were negatively correlated with UAER (r=-0.285, P<0.05), while positively correlated with GFR (r=0.379, P<0.05); 4) Logistic regression analysis indicated that UAER and GFR were the major risky factors for diabetic cognitive impairment.
 CONCLUSION Diabetic cognitive impairment is closely correlated with the nephropathy in patients with Type 2 diabetes. With the decline in glomerular filtration function, the cognitive disorder tends to be aggravated. The hippocampal brain metabolism may have some changes in left side of Cho/Cr in patients with diabetic nephropathy.
Adult ; Aspartic Acid ; analogs & derivatives ; metabolism ; Case-Control Studies ; Cerebrum ; metabolism ; Choline ; metabolism ; Cognition ; Cognition Disorders ; epidemiology ; Creatine ; metabolism ; Diabetes Mellitus, Type 2 ; physiopathology ; Diabetic Nephropathies ; epidemiology ; Glomerular Filtration Rate ; Humans ; Neuropsychological Tests

Background and purpose: Bladder cancer is the most common urological malignancy in our country which seriously threatens human health, and its incidence increased year by year. This study aimed to investigate the effects of hinokitiol on the proliferation, apoptosis and autophagy in human bladder cancer cell lines. Methods:CCK-8 assays were performed to analyze the effects of hinokitiol on the proliferation of J82 cells. Apoptosis rate was determined by lfow cytometry. Cleaved caspase 3, LC3 and P62 protein expression was determined using Western blot. EGFP-LC3 microscopy assay was performed to assess autophagy. Results: Hinokitiol significantly inhibited the proliferation of J82 cells and induced cell apoptosis via caspase pathway. The apoptosis effect of hinokitiol could be partially antagonized by Z-VAD-FMK. Hinokitiol induced autophagy of J82 cells, increased LC3 expression and down-regulated P62 expression. 3-MA is able to rescue Tet-induced cell death. Conclusion:Hinokitiol can inhibit the proliferation of J82 cells and induce cell apoptosis via autophagy activation.

Objective:To establish a headspace capillary GC method for the determination of residual solvents in bromfenac sodi-um. Methods:A headspace GC was used to separate the residual solvents on an HP-5 capillary column with an FID detector. The car-rier gas was nitrogen at the flow rate of 0. 8 ml·min-1 . The temperature of the injector was 200 ℃ and that of the FID was 250 ℃. The programmed column temperature was set as follows:maintained at 40℃ for 10 min, and then raised to 150℃ at the rate of 30℃·min-1 and maintained for 5 min. The containers of headspace injector were in equilibrium at 100 ℃ for 20 min. Dimethyl sulfoxide was used as the solvent. The amount of the residual solvents, such as methylbenzene, isopropanol, dichloromethane, methanol and iso-propyl ether was calculated by an external standard method. Results:All the solvents could be completely separated with good linear relationship. The average recovery of the five solvents was 98. 9%( RSD =2. 01%),99. 2% ( RSD =1. 95%),99. 6% ( RSD =1. 65%),100. 5%(RSD=1. 38%)and 100. 8%(RSD=1. 36%)(n=9),respectively. Conclusion:The method is simple and accu-rate in the determination of the five residual solvents in bromfenac sodium.

Polydimethylsiloxane (PDMS) and hydroxyapatite (HA) were combined in our laboratory to fabricate an elastic porous cell scaffold with pore-forming agent, and then the scaffold was used as culture media for rat bone marrow derived mesenchymal stem cells (rBMSCs). Different porous materials (square and circular in shape) were prepared by different pore-forming agents (NaCl or paraffin spheres) with adjustable porosity (62%-76%). The HA crystals grew on the wall of hole when the material was exposed to SBF solutions, showing its biocompatibility and ability to support the cells to attach on the materials.
Animals ; Biocompatible Materials ; chemistry ; Dimethylpolysiloxanes ; chemistry ; Durapatite ; chemistry ; Mesenchymal Stromal Cells ; cytology ; Porosity ; Rats ; Tissue Scaffolds