Objective To investigate the changes of the constitution and its ratio of collagen fiber in the process of masseter reattachment following different osteotomies of the prominent mandibular angle so as to offer guidance for the resection of mandibular angle. Methods Sixteen adult goats were randomized into four groups. In group A we performed unilateral curved osteotomy of the mandibular angle. In group B unilateral curved ostectomy was performed with partial masseter resection. In group C unilateral angle splitting ostectomy, while in group D unilateral dissection of the masseter muscle was conducted. The constitution and its ratio of collagen fiber in the interface were observed at 1-month, 2-month, 3-month, and 6-month after operation. Results On the changes of collagen fiber in the process of muscular reattachment, at 1-month post-operation, the constitution of collagen fiber (types Ⅰ and Ⅲ) in groups A and B were significantly different from that of control group (P<0.05). However, both groups C and D had no statistic difference from control group (P>0.05). At 2-month, 3-month and 6-month post-operation, those of all experimental groups had no statistic difference from control group. And with time, the percentage of collagen fiber type Ⅰ increased and type Ⅲ decreased gradually. Conclusion The recovery sequences of masseter muscle reattachment in this study are firstly group C, secondly group A and finally group B. It suggests that the recoveries of mastication and other oral activities are different. Group B turns out to be with a slow muscle reattachment. Thus, we recommend treating different kinds of mandibular hypertrophy with different ostectomies.

Objective To investigate the changes of the masseter muscle following osteotomy of the prominent mandibular angle and to provide guidance for the resection of mandibular angle. Methods Ten goats were equally divided into two groups. In group A we performed unilateral curved osteotomy of the mandibular angle, and in group B we performed unilateral dissection of the masseter muscle. The cross section area (CSA) and the sarcomere length of masseter muscle were measured beore and after operation. Results (1) Cross section area (CSA) of masseter muscle fiber in curved ostectomy group decreased at 1,2, 3 and 6 months after operation in different extent. Comparing with the control group, the difference was statistically significant (P<0.01). CSA of masseter muscle fiber in dissection group decreased 1 month postoperatively, which had significantly statistic difference with control group (P<0.01). But, they had no significant difference with control group at 2, 3, and 6 months after operation (P>0.01). (2) Sarcomere length of masseter muscle in curved ostectomy group decreased in 1 week, 1 and 2 months after operation, which had significantly statistic difference with control group (P<0.01). At 3 months after operation, sarcomere length recovered to normal. In dissection group, sarcomere length decreased in 1 week and 1 month after operation, which had significantly statistic difference with control group (P<0.01). At 2 month after operation, it recovered to normal. Conclusion Certain extent of atrophy does happen to masseter muscle after mandibular angle ostectomy. Meanwhile, these changes do not significantly impair the function of masseter muscle. According to this, we suggest a simple mandibular angle ostectomy without partial resection of masseter muscle in case of mild to morderate mandibular angle hypertrophy. Doing so, we can not only achieve the cosmetic effect but also reduce the implications.

AIMTo study the changes of synaptic plasticity in rat model with Alzheimer disease (AD).

METHODSAD rat model was conducted by D-galactose intraperitoneal injection combined with lesions of nucleus basalis of Meynert (nbM). Behavioral performance, LTP in dentate gyrus and synaptic morphology in hippocampal CA1 were observed.

RESULTS(1) Escape latencies in place test in model rats were longer than that in control rats, and swimming time and distance between the two groups in platform quadrant were significant differently (P < 0.01). (2) The numerical density (Nu) and surface density (Su) of synaptic contact zones markedly decreased (P < 0.01) in model rats. (3) Augment of population spike (PS) in perforant path-dentate gyrus of model rats after high frequency stimulation was smaller than that of the control (P < 0.05).

CONCLUSIONThe results suggest that the decreased synaptic plasticity in hippocampus could responsible for the impairment of spatial learning of model rats.

Alzheimer Disease ; physiopathology ; Animals ; Basal Nucleus of Meynert ; pathology ; Disease Models, Animal ; Female ; Galactose ; pharmacology ; Hippocampus ; physiopathology ; Long-Term Potentiation ; Male ; Neuronal Plasticity ; Rats ; Rats, Wistar

Objective To evaluate the efficacy of pegylated interferon ( PegIFN ) α-2a plus ribavirin ( RBV) therapy for chronic hepatitis C ( CHC) in non-responders, and to investigate the related influencing factors.Methods A prospective, open, multicenter and randomized study was conducted.A total of 81 CHC non-responders were recruited from 10 clinical centers during February 2009 to November 2011.Patients were randomly assigned into two groups:group A (n=37) was given PegIFNα-2a plus RBV treatment for 72 weeks and group B (n=44) was given PegIFNα-2a plus RBV treatment for 96 weeks.Both groups were followed up for 24 weeks after treatment.Virological responses in two groups were observed, and treatment efficacies among patients with different genotypes, and among those with different previous treatment were compared.SAS software was used for statistical analysis.Results Fifty-two patients ( 28 from group A and 24 from group B) completed the study in total.The rates of rapid virological response ( RVR) , complete early virological response ( cEVR ) , end of treatment viral response ( ETVR ) and sustained virological response (SVR) in group A were 25.0% (7/28), 60.7% (17/28), 67.9%(19/28) and 60.7%(17/28), respectively; while those in the group B were 41.7% (10/24), 70.8%(17/24), 70.8%(17/24) and 70.8% (17/24), respectively; and there were no significant differences between two groups (P>0.05).SVR was observed in 82.9%(29/35) of patients with CC genotype of IL-28B, which was higher than that in patients with other genotypes ( 3/13 ) , and the difference was of statistical significance (P<0.01).There was no significant difference in viral responses between patients previously treated with IFN plus RBV and those treated by IFN only (P>0.05).The rates of RVR, cEVR, ETVR and SVR in patients who were previously treated with IFN were 36.4%(12/33), 81.8%(27/33), 81.8%(27/33) and 75.8%(25/33), and the rates of cEVR, ETVR and SVR were higher than those in patients who were previously treated with PegIFN (P<0.05), but no significant difference was observed in RVR (P>0.05).Adverse events occurred in 38 patients (46.9%), but no severe ones were observed. Conclusion The efficacy of PegIFNα-2a plus RBV therapy for CHC in non-responders is satisfactory, which may influenced by IL-28B genotypes and previous treatment.

OBJECTIVETo introduce the application of percutaneous epididymal sperm aspiration (PESA) in the differential diagnosis between obstructive and non-obstructive azoospermia, and to investigate the association of the results of PESA with testis volume and the level of serum follicle stimulating hormone (FSH).

METHODSA total of 118 patients with diagnosed azoospermia were included. Their testis volume was measured by model method, the serum gonadal hormone level examined by chemoluminescence assay, and the epididymal fluid obtained by puncturing the head of the epididymis with a size-7 butterfly needle.

RESULTSSperm was found in the epididymal fluid in 60 of the patients, 56 with normal and 4 with smaller testis volume, and 55 with normal and 5 with higher FSH level. No sperm was detected in the other 58 cases, 34 with normal and 24 with smaller testis volume, and 38 with normal and 20 with higher serum FSH level. The rate of successful PESA was significantly higher in patients with normal testis volume or normal serum FSH level than in those with smaller testis volume (P < 0.05) or higher serum FSH level (P < 0.05).

CONCLUSIONPESA is a quick, convenient and effective method for the differential diagnosis between obstructive and non-obstructive azoospermia.

Adult ; Azoospermia ; diagnosis ; Epididymis ; Follicle Stimulating Hormone ; blood ; Humans ; Male ; Middle Aged ; Punctures ; methods ; Spermatozoa ; Testis ; pathology

Lung cancer is one of the top 10 causes of death in the world today,and it is a great concern worldwide for its high mortality rate.Currently,the researchers are digging into various factors influencing the occurrence and develop-ment of lung cancer in order to increase the odds for curing lung cancer,improve the prognosis of lung cancer patients as well as reduce its morbidity.The Mediterranean diet(MD)is a special dietary structure that is based on eating vegetables,fruits,coarse grains,legumes and low-fat fish,which have anti-inflammatory,antioxidant and lipid-lowering effects.Recent studies have revealed that the MD may prevent lung cancer occurrence to some extent and inhibit its development.The purpose of this paper is to summarize and analytically discuss the effects of the MD on the oncogenesis and development of lung cancer through a review of the relevant literatures,thus to provide references for MD to prevent and treat lung cancer.

OBJECTIVETo scan for mutations of polycystic kidney disease 1 gene (PKD1) in Chinese population in order to find some features about Chinese patients and a better approach to detect mutations.

METHODSTwenty-five PKD-affected individuals from twenty-one unrelated genealogies and sixteen controls participated in the study. Thirty-five blood samples and six tissues were obtained after receiving informed consent and were in accordance with institutional ethical guidelines. Genomic DNA was isolated from peripheral blood using standard procedures. PCR amplification of genomic DNA was performed to generate the aimed fragments. Amplified fragments were analyzed by denaturing gradient gel electrophoresis (DGGE). A GC clamp was attached to the 5' primer. After that, the abnormal fragments were sequenced on freshly amplified specific PCR products with the dideoxynucleotide chain termination method. Sequencing was performed for all samples to evaluate DGGE.

RESULTSAimed fragments of exons 44 and 45 were amplified. DGGE detected eleven abnormal PCR fragments. Two novel mutations were identified by sequencing, included one nonsense mutation (C12217T) and one frameshift (12431delCT). In addition, one polymorphism (A50747C) was identified. The mutation detection rate is 8% in our study.

CONCLUSIONTwo novel pathogenic mutations were detected, including one nonsense mutation (C12217T) and one frameshift (12431delCT).

Asian Continental Ancestry Group ; genetics ; Codon, Nonsense ; DNA Mutational Analysis ; Exons ; genetics ; Family Health ; Female ; Frameshift Mutation ; Genotype ; Humans ; Male ; Middle Aged ; Mutation ; Pedigree ; Phenotype ; Polycystic Kidney, Autosomal Dominant ; genetics ; Polymorphism, Single Nucleotide ; Proteins ; genetics ; TRPP Cation Channels

OBJECTIVETo investigate the therapeutic effect of free tissue flap anastomosed with reverse descendant branch of lateral femoral circumflex artery for severe soft tissue defect at leg.

METHODSThe severe soft tissue defect at leg, without any vessels for anastomosis of free tissue flap, was reconstructed with free tissue flap, which was anastomosed with proximal end of descendant branch of lateral femoral circumflex artery and great saphenous vein. From Oct. 2004 to Dec. 2009, 36 cases were treated with 15 cases of latissimus dorsi musculocutaneous flaps, 12 cases of anterolateral femoral flaps, and 9 cases of thoracoumbilicus flaps.

RESULTSAll the 36 free flaps survived completely. The patients were followed up for 6 months to 2.5 years with good cosmetic results.

CONCLUSIONSIt is effective and practical to repair the severe soft tissue defects at legs with the reverse descendant branch of lateral femoral circumflex artery to carry the free flaps.

Adult ; Female ; Femoral Artery ; surgery ; Follow-Up Studies ; Free Tissue Flaps ; Humans ; Leg Injuries ; surgery ; Male ; Middle Aged ; Skin Transplantation ; methods ; Soft Tissue Injuries ; surgery ; Thigh ; surgery ; Treatment Outcome ; Young Adult

Objective To observe the change of dopamine receptor in ventral tegmental area (VTA), nucleus accumbens (NAc) and prefrontal cortex (PFC) in morphine-dependent rats, and the regulation effect of electroacupuncture (EA). Method Thirty male SD rats were randomized into a control group, a model group and an EA group, 10 rats each. Morphine-dependent rat models were induced by morphine self-administration. In the EA group, bilateral Jiaji points (EX-B2) of T5 and L2 were selected, and the EA intervention lasted 4 d. Western blotting method was adopted to observe the change of the contents of dopamine receptor D1 and D2 in VTA, NAc and PFC of the rats. Result After the intervention, compared to the model group, the morphine intake was reduced significantly in the EA group (P<0.05); the level of D2 declined significantly in VTA of rats in the model group (P<0.05); the level of D1 increased significantly and D2 declined significantly in NAc of rats in the model group (P<0.05); the level of D1 declined significantly and D2 increased significantly in PFC of rats in the model group (P<0.05); EA produced regulation effect on the altered contents of D1 and D2 in the cerebral areas mentioned above, approaching the normal level. Conclusion EA can inhibit the hunger of addiction rats for morphine to some extent; the contents of dopamine receptors in dopamine projection pathway will take adaptive changes after morphine addiction, while EA can regulate the abnormal expressions of dopamine receptors, producing a protective effect on dopamine receptors of morphine-dependent rats.

Objective The loop electrosurgical excision procedure (LEEP) is a major option for the treatment of cervical in-traepithelial neoplastic (CIN) lesions,but reports are rarely seen on the consistency of the result of post-LEEP pathology with that of preoperative biopsy as well as on the postoperative pathological upgrading of related factors. This study analyzes the consistency of the result of preoperative biopsy with that of post-LEEP pathology for CIN lesions and the risk factors for residual and/or recurrence after LEEP. Methods A retrospective study was conducted on 1 089 patients with CIN lesions treated by LEEP in our hospital from May 2014 to A-pril 2017. All the patients underwent liquid-based thin-layer cytology (TCT) and vaginoscopic biopsy preoperatively,followed by analysis of the results of TCT,the consistency of the result of preoperative bi-opsy with that of post-LEEP pathology,and the risk factors for residu- al and/or recurrence after LEEP. Results Preoperative biopsy showed 447 cases of low-grade squamous intraepithelial lesion (LSIL),among which TCT revealed 85 cases negative for intraepithelial lesion and malignancy (NILM),with a false negative rate of LSIL of 19.0%. Of the 645 cases of high-grade squamous intraepithelial lesion (HSIL) revealed by preoperative biopsy,TCT manifes-ted 95 cases of NILM,with a false negative rate of HSIL of 14.7%,which was significantly lower than that of LSIL (P<0.05). Preop-erative biopsy showed 447 cases of LSIL,among which post-LEEP pathology manifested 316 cases of LSIL (70.69%) and 51 cases of HSIL (11.4%). Of the 635 cases of HSIL revealed by preoperative biopsy,post-LEEP pathology exhibited 4 cases (0.63%) of inva-sive cervical cancer (ICC). Multivariate analysis showed the risk factors for pathological upgrading after LEEP were sexual partners >2 (OR=0.139,95% CI: 0.034-0.561) and LSIL in TCT (OR=0.111,95% CI: 0.040-0.310) (P<0.05) and those for postopera-tive recurrence included positive incision margin (OR=2.970,95% CI: 1.010-8.733) and persistent human papilloma virus (HPV) infection (OR=5.446,95% CI: 3.109-9.540). Preoperative HPV16 infection was correlated with lesion residual and/or recurrence after LEEP (P<0.05). Conclusion LEEP can significantly improve the diagnosis rate of HSIL in low-grade CIN patients with high risk factors. The risk factors for lesion residual and/or recurrence after LEEP include HPV16 infection,lesion involvement of the inci-sion margin,and persistent HPV infection.