ObjectiveTo observe the effect of resveratrol on the oxidative stress and antioxidant levels of different mitochondrial subpopulations in the skeletal muscle and insulin sensitivity of rats fed with high-fat diet.MethodsMale SD rats,aged 8 weeks,were divided into normal chow (NC) group,high-fat diet(HF) group,high-fat diet plus resveratrol ( HFR ) group.After intervention for 8 weeks,the impacts of resveratrol on oxidative stress levels and antioxidant enzymes activities in subsarcolemmal ( SS ) and intermyofibrillar ( IMF ) mitochondria from skeletal muscle as well as general and skeletal mascle insulin sensitivity were assessed.ResultsCompared with NC group, insulin sensitivity was significantly reduced while reactiveoxygenspecies (ROS)and malondialdehyde(MDA) levels in SS and IMF mitochondria increased in HF group ( all P＜0.01 ).In addition,antioxidant enzyme activities were significantly decreased in SS mitochondrial and increased in IMF mitochondrial ( both P ＜ 0.05 ).Compared with HF group,the insulin sensitivity in HFR group was significantly improved.Moreover,the activities of antioxidant enzymes in SS and IMF mitochondrial were increased,and the oxidative stress levels returned to normal ( P ＜ 0.05 ).ConclusionResveratrol notably improves the oxidative stress of different skeletal muscle mitochondrial subpopulations and insulin resistance in rats fed with high-fat diet.

Pancreatic cancer is malignant with a poor prognosis,and its incidence is rising worldwide in recent years.Multiple slices spiral computed tomography and computed angiography are the first choice for the diagnosis of pancreatic cancer,while misdiagnosis of pancreatic cancer still exists.From August 2009 to October 2011,80 patients with pancreatic or periampullary cancer were diagnosed using the medical image three dimensional visualization system (MI-3DVS).The threedimensional models of the liver,pancreas,vascular system and tumors were reconstructed successfully based on the 64-slice spiral computed tomography data.According to the analysis of the three dimensional models,4 patients underwent standard pancreaticoduodenectomy,1 received palliative surgery.MI3DVS plays an important role in the diagnosis and assessement of resectability of pancreatic and periampullary cancer.

The self-designed experimental teaching method is introduced in detail in this paper,including the preparative work before class,discussion of experimental designing proposal,and accomplishment of specific experiment and so on.The teaching method innovations on pathophysiology experiment are very helpful to cultivate the students' ability to solve practical problem and lay the foundation to cultivate talented medical science personal.

Objective To investigate the possible origin of ovarian epithelial inclusions and its relationship with the low-grade ovarian serous carcinoma.Methods By comparatively evaluating the morphologic (secretory and ciliated cell distribution ) and immunophenotypic [using paired box gene 8 (PAX8),tubulin,calretinin,and Ki-67 as first antibodies] attributes of ovarian epithelial inclusions,the normal tubal epithelium,and the ovarian tumors,all adnexal tissues from a total of 198 patients were studied,including 116 adnexae removed for non-neoplastic indications,53 serous cystadenomas,44 serous borderline tumors,and 41 low-grade serous carcinomas,which were collected from Qilu Hospital of Shandong University and University of Arizona in USA.Immunohistochemical single staining was used to detect the expressions of PAX8,tubulin,calretinin,and Ki-67 in the two groups,while immunohistochemical double staining of PAX8/calretinin was used to figure out the immunophenotype of various ovarian epithelial inclusions in a more intuitive way.Results With immunohistochemical single staining of PAX8 and calretinin,the vast majority (90％,54/60) of ovarian surface epithelia displayed a mesothelial phenotype [calretinin(+),PAX8 (-)],whereas 10％ (6/60)of the cases displayed foci with tubal phenotype [calretinin(-),PAX8 (+)].In contrast,most (79％,728/921 ) of the ovarian epithelial inclusions displayed a tubal phenotype,though 21％ (193/921) of the ovarian epithelial inclusions showed a mesothelial phenotype.It was further proved by immunohistochemical double staining of PAX8/ calretinin.Secretory and ciliated cells were found in the ovarian epithelial inclusions with tubal phenotype.There was a progressive increase in the secretory/ciliated cells ratio and proliferative index,from ovarian epithelial inclusions/cystadenomas to borderline tumors to low-grade serous carcinoma,according to the expression of tubulin and Ki-67.Conclusions The findings make a strong argument that the ovarian epithelial inclusions displaying a tubal phenotype with PAX8 (+),calretinin (-) is likely derived from fallopian tube rather than through Mullerian metaplasia from ovarian surface epithelium.The increasing trend of secretory/ciliated cells ratio and proliferative index from ovarian epithelial inclusions/cystadenomas to borderline tumors to low-grade serous carcinoma indicates that the latter is a clonal expansion of secretory cells.Genetic and molecular studies are needed to further confirm these findings.

Intracranial atherosclerosis is one of the leading causes of ischemic stroke and occurs more commonly in patients of Asian, African or Hispanic origin than in Caucasians. Although the histopathology of intracranial atherosclerotic disease resembles extracranial atherosclerosis, there are some notable differences in the onset and severity of atherosclerosis. Current understanding of intracranial atherosclerotic disease has been advanced by the high-resolution magnetic resonance imaging (HRMRI), a novel emerging imaging technique that can directly visualize the vessel wall pathology. However, the pathological validation of HRMRI signal characteristics remains a key step to depict the plaque components and vulnerability in intracranial atherosclerotic lesions. The purpose of this review is to describe the histological features of intracranial atherosclerosis and to state current evidences regarding the validation of MR vessel wall imaging with histopathology.
Asian Continental Ancestry Group ; Atherosclerosis ; Autopsy ; Hispanic Americans ; Humans ; Intracranial Arteriosclerosis* ; Magnetic Resonance Imaging* ; Microscopy* ; Pathology ; Stroke

Chinese patent orthopedic medicines feature complex components, mainly including desperate and toxic herbal pieces, narrow safety window, more clinical contraindications and frequent adverse drug reaction/events (ADR/ADE). To study the general safe medication regularity of Chinese patent orthopedic medicines, define key points in the medication education and ensure rational clinical medication, the authors took 80 types of commonly used Chinese patent orthopedic medicines as the study objects, collect 237 cases from 164 ADR/ADE documents through a system retrieval strategy, make a multidimensional literature analysis to determine the common risk factors for safe and rational medication of Chinese patent orthopedic medicines and establish an ADR/ADE prevention regularity. First, in the aspect of clinical symptoms, skin allergy is the most common ADR/ADE and closely related to the toxic ingredients, particularly accumulated liver or kidney damage caused by some drugs. Second, there are three time nodes in the ADR/ADE occurrence; The ADR/ADE occurred in 30 minutes is closely related to the idiosyncrasy; the ADR/ADE occurred between several months and half a year is related to the drug-induced liver and kidney damages; The most common ADR/ADE was observed within 7 days and predictable according to the pharmacological actions; Third, toxicity is an important factor in the occurrence of ADR/ADE of Chinese patent orthopedic medicines. Fourth, emphasis shall be given to the special medication factors, such as the combination with western medicines and Chinese herbal decoctions, overdose and long-course medication and self-medical therapy. In conclusion, the general ADR/ADE prevention regularity for Chinese patent orthopedic medicines was summarized to provide supports for clinicians in safe and rational medication and give the guidance for pharmacist in medication education.
Adult ; Aged ; Bone Diseases ; drug therapy ; Drug-Related Side Effects and Adverse Reactions ; etiology ; Drugs, Chinese Herbal ; adverse effects ; therapeutic use ; Female ; Humans ; Male ; Middle Aged ; Nonprescription Drugs ; Orthopedics ; legislation & jurisprudence ; Young Adult

ObjectiveTo investigate the effects of adult catch-up growth on insulin sensitivity and stress in rats, as well as the probable mechanism of insulin resistance. MethodsMale Sprague-Dawley rats were divided into 6 groups:caloric restriction group ( R4, caloric restriction for 4 weeks) and normal controls for 4 weeks ( NC4 ) ; catchup growth group refed with normal chow( RN4, refeeding for 4 weeks after caloric restriction for 4 weeks), catch-up growth group refed with high-fat diet( RH4, refeeding for 4 weeks after caloric restriction for 4 weeks ), normal chow (NC8) or high-fat diet( HF8 ) controls for 8 weeks. The animal model of catch-up growth was devoloped by way of refeeding after caloric restriction as scheduled. The glucose infusion rate( GIR ), 2-deoxyglucose uptake and insulinsitmulated insulin signaling in skeletal muscle during hyperinsulinemic-euglycemic clamp, plasma corticosterone, and 11β-hydroxysteroid dehydrogenase type 1 ( 11β-HSD1 ) mRNA expression level in skeletal muscle were determined.ResultsAfter caloric restriction for 4 weeks, plasma corticosterone and 1 1 β-HSD1 mRNA expression in skeletal muscle were significantly higher in R4 group compared with NC4 group( both P＜0. 05 ), but there were no differences in 2-deoxyglucose uptake and Ser473 phosphorylation of Akt in skeletal muscle between two groups. The plasma corticosterone and 11β-HSD1 mRNA expression in skeletal muscle in RN4 group were significantly higher than those in NC8 group, and were higher in RH4 group than those in NC8 and HF8 groups; while the 2-deoxyglucose uptake and insulin-stimulated Ser473 phosphorylation of Akt in skeletal muscle during the clamp in RN4 were remarkably lower than those in NC8 group, and were lower in RH4 than those in NC8, HF8, and RN4 groups (all P ＜ 0. 05 ).ConctusionsCatch-up growth rats refed with normal chow or high-fat diet are characterized by significant insulin resistance and stress in the whole body and skeletal muscle. These changes are more evident in catch-up growth rats refed with high-fat diet. The interaction of increased stress and diet might be of utmost importance in the etiology of insulin resistance in catch-up growth animals.

dation, transiently inercasod food efficiency,and a faster growth rate of visceral adipose tissue versus body weight after nutritional rehabilitation. These findings are consistent with the characteristics of human catch-up growth.

OBJECTIVETo investigate the relationship between lamivudine-resistant mutants of hepatitis B virus (HBV) and serum HBV DNA loading before antiviral therapy.

METHODSThis study involved 106 patients with hepatitis B receiving lamivudine treatment for an average of 32 months (rang 12-48 months). Serum HBV DNA loadings were measured with PCR before and every 4 to 6 months during lamivudine therapy. HBV YMDD mutants were detected using mismatched PCR-restriction fragment length polymorphism (PCR-RFLP) during lamivudine treatment.

RESULTSHBV DNA loading was significantly higher in patients infected with HBV YMDD mutants during lamivudine therapy than those infected with HBV without YMDD mutation.

CONCLUSIONHigh viral loading in hepatitis B patients before treatment is associated with high likeliness of HBV YMDD mutation during lamivudine treatment. HBV DNA loading may be indicative for the occurrence of YMDD mutation during lamivudine therapy.

Antiviral Agents ; pharmacology ; DNA, Viral ; blood ; Drug Resistance, Viral ; genetics ; Female ; Hepatitis B ; blood ; Hepatitis B virus ; drug effects ; genetics ; physiology ; Humans ; Lamivudine ; pharmacology ; Male ; Middle Aged ; Mutation ; Viral Load ; genetics

Actins ; metabolism ; Antigens, CD ; metabolism ; Antigens, Differentiation, Myelomonocytic ; metabolism ; Bile Duct Neoplasms ; metabolism ; pathology ; surgery ; Bile Ducts, Intrahepatic ; Cholangiocarcinoma ; metabolism ; pathology ; surgery ; Female ; Giant Cells ; metabolism ; pathology ; Humans ; Keratins ; metabolism ; Liver Neoplasms ; metabolism ; pathology ; surgery ; Osteoclasts ; metabolism ; pathology ; Vimentin ; metabolism