Association Analysis of Hyperlipidemia with the 28-Day All-Cause Mortality of COVID-19 in Hospitalized Patients / 中国医学科学杂志(英文版)

Objective This study aimed to determine the association of hyperlipidemia with clinical endpoints among hospitalized patients with COVID-19, especially those with pre-existing cardiovascular diseases (CVDs) and diabetes. Methods This multicenter retrospective cohort study included all patients who were hospitalized due to COVID-19 from 21 hospitals in Hubei province, China between December 31, 2019 and April 21, 2020. Patients who were aged < 18 or ≥ 85 years old, in pregnancy, with acute lethal organ injury (e.g., acute myocardial infarction, severe acute pancreatitis, acute stroke), hypothyroidism, malignant diseases, severe malnutrition, and those with normal lipid profile under lipid-lowering medicines (e.g., statin, niacin, fenofibrate, gemfibrozil, and ezetimibe) were excluded. Propensity score matching (PSM) analysis at 1:1 ratio was performed to minimize baseline differences between patient groups of hyperlipidemia and non-hyperlipidemia. PSM analyses with the same strategies were further conducted for the parameters of hyperlipidemia in patients with increased triglyceride (TG), increased low-density lipoprotein cholesterol (LDL-C), and decreased high-density lipoprotein cholesterol (HDL-C). Mixed-effect Cox model analysis was performed to investigate the associations of the 28-days all-cause deaths of COVID-19 patients with hyperlipidemia and the abnormalities of lipid parameters. The results were verified in male, female patients, and in patients with pre-existing CVDs and type 2 diabetes. Results Of 10 945 inpatients confirmed as COVID-19, there were 9822 inpatients included in the study, comprising 3513 (35.8%) cases without hyperlipidemia and 6309 (64.2%) cases with hyperlipidemia. Based on a mixed-effect Cox model after PSM at 1:1 ratio, hyperlipidemia was not associated with increased or decreased 28-day all-cause death [adjusted hazard ratio (

Analysis of classical prescription Jinshui Liujun Jian based on ancient literature / 中国中药杂志

To provide the ancient literary evidence support for the clinical application and development of classical prescription based on systematical collection and analysis of the ancient Chinese medical literature containing Jinshui Liujun Jian, including its origin and development. Bibliometric analysis was used and information of Jinshui Liujun Jian in ancient Chinese medical literature was then collected for statistical analysis of formula compositions, main indications, dosage, preparation methods, etc. A total of 151 valid items of data were obtained from 48 ancient Chinese medicine books. Jinshui Liujun Jian was first recorded in Jingyue Quanshu written by ZHANG Jiebin. This prescription consisted of Rehmanniae Radix Praeparata, Angelicae Sinensis Radix, Pinelliae Rhizome, Citri Reticulatae Pericarpium, Poria and Glycyrrhizae Radix et Rhizome Praeparata cum Melle, and it was mainly used to treat the deficiency of lung and kidney, edema and excess production of phlegm, or Yin deficiency in the old, insufficient blood-qi, wind-cold evil, cough and disgusting, asthma and excessive phlegm. Doctors in later dynasties mostly followed the prescription compositions, dosages and indications in Jingyue Quanshu, and extended the clinical application of this prescription.

Anti-cancer Effect of Anthraquinones in Polygoni Multiflori Radix / 中国实验方剂学杂志

Objective: Polygoni Multiflori Radix is the drought root of a perennial vine, Polygonum multiflorum, which is belong to Polygonaceae. According to Chinese Pharmacopeia (edition 2015), its preparations are divided into two types based on the processing:crude Polygoni Multiflori Radix, and processed Polygoni Multiflori Radix Praparata. This study aimed to explore the substantial bases, effect and the mechanisms of anthraquinones in Polygoni Multiflori Radix. Method: Based on the literatures retrieved in PubMed, CNKI and Chongqing VIP in past 15 years, the chemical composition, pharmacological effects and mechanisms of anthraquinones in Polygoni Multiflori were reviewed and summarized. Result: There were 20 anthraquinones in Polygoni Multiflori. Compared with other Polygonaceae plants, there were higher contents of emodin and physcion, both were qualification markers in Polygoni Multiflori. In terms of the anti-cancer effect, emodin, emodin-8-O-β-D-glucoside, aloe-emodin, chrysophanol, physcion, physcion-8-O-β-D-glucoside and rhein induced cancer cell apoptosis. Emodin, aloe-emodin, chrysophanol, physcion and rhein inhibited cancer cell cycles. Emodin, aloe-emodin, physcion and emodin-8-O-β-D-glucoside blocked migration, invasion and metastasis. And emodin, chrysophanol and rhein blocked energy metabolism, and emodin reversed multidrug resistance in cancer. Conclusion: Polygoni Multiflori may play a potential anti-cancer value, and its underlying mechanisms and the interaction between components are worth of further studies.

Preliminary Study on Physiological Mechanism of "Treating Waist by Abdominal Massage Therapy" / 中国中医药信息杂志

This article discussed the possible physiological mechanism of "treating waist by abdominal massage therapy" from the perspectives of TCM and modern medicine, and analyzed the effects of abdominal massage from the nerve, fascia, visceral, muscle and other aspects, with a purpose to elucidate that the occurrence of relevant diseases may be caused by a variety of factors, and different massage techniques have different effects on the body.

Clinical effect of arthroscopy-assisted minimally invasive management of bunion / 中国骨伤

<p><b>OBJECTIVE</b>To evaluate the effect of arthroscopy-assisted minimally invasive management of bunion and hallux valgus deformities.</p><p><b>METHODS</b>Total 50 patients (53 feet) with bunion and hallux valgus deformities were treated under arthroscopy from July 2008 to July 2011, with an average age of 42.3 years old (ranging from 30 to 65 years old) involving 19 left feet, 28 right feet and 3 both feet. The American Orthopedic Foot and Ankle Society (AOFAS) hallux metatarsophalangeal-interphalangeal(MP-IP) Scale Score was used to evaluate the therapeutic effect.</p><p><b>RESULTS</b>There were no complications such as hallux varus, hallux rigid and nerve or blood vessel injury. Clinically, AOFAS MP-IP Scale Score was increased from 62.19 ± 6.01 preoperatively to 88.26 ± 6.81 postoperatively.</p><p><b>CONCLUSION</b>Arthroscopy-assisted minimally invasive management appears to be a good procedure with advantages of less complication, little trauma and early rehabilitation for bunion and hallux valugs deformities.</p>

Clinical observation of arthroscopic debridement for acute gouty arthritis of the ankle / 中国骨伤

<p><b>OBJECTIVE</b>To evaluate the effects of arthroscopic debridement for acute gouty arthritis of the ankle.</p><p><b>METHODS</b>Forty-one patients with acute gouty arthritis of the ankle were treated under arthroscopy from January 2010 to June 2012. All the patients were male, age in ranging from 28 to 69 years with an average of 43 years. Eighteen patients were in the left ankles and 23 in the right ankles; 12 cases were firstly attack and 29 cases were recurrent attack. Course of disease was from 2 weeks to 30 months. The American Orthopedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Scale score was used to evaluate the clinical effects. Number of acute attacks of gouty arthritis were observed.</p><p><b>RESULTS</b>All the patients were followed up at least 12 months. The mean AOFAS Ankle-Hindfoot Scale score increased from 58.44 +/- 9.45 preoperatively to 86.15 +/- 7.36, 83.41 +/- 9.22, 84.10 +/- 8.22 postoperatively at 6, 12, months and the last follow-up respectively. Swelling of the ankle were improved significantly, pain was relieved and the mean number of acute attacks of gouty arthritis decreased significantly.</p><p><b>CONCLUSION</b>Arthroscopy is helpful for the diagnosis of acute gouty arthritis of the ankle and improvement of clinical symptoms and ankle function.</p>

Extraction and purification process of the active ingredient eurycomanone from Eurycoma longifolia Jack / 中国药学杂志

OBJECTIVE: To optimize the extraction and purification process of eurycomanone (EN) from Eurycoma longifolia Jack. METHODS: Using single factor test and orthogonal test to screen the best conditions of ethanol concentration, extraction time, amount of solvent and extraction times with the index of transfer rate of EN. Resin model was screened by static adsorption and desorption test, purification process of EN was investigated by single factor test and orthogonal test. RESULTS: The optimal condition of the extracting was 20-fold water, 2 times with the first 2 and 1 h for the second time. Optimal purification process of HPD100 macroporous resin was 70% amount of saturated adsorption sample, 0.25 g·mL-1 of sample liquid concentration, 3BV·h-1 of sample flow rate, eluting using the 30% ethanol, 3 BV·h-1 of elution velocity. CONCLUSION: The optimized process is simple, stable and repeatable, which is suitable for industrial production.

Effect of ruji recipe on the post-surgical survival of female breast cancer patients / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the effect of Ruji Recipe (RR) in preventing disease recurrence/metastasis and improving quality of life (QOL) for female breast cancer patients after operation.</p><p><b>METHODS</b>Totally 102 female patients with stage I - III breast cancer were retrospectively analyzed. They were assigned to the treatment group (54 cases) and the control group (48 cases) according to whether they would rather accept RR therapy. Estrogen receptor/progesterone receptor (ER/PR) positive patients also accepted endocrine therapy. The overall survival (OS), disease-free survival (DFS), recurrence and metastasis, and QOL were compared between the two groups.</p><p><b>RESULTS</b>Totally 100 patients completed the study. The median follow-up was 59 months. The median OS was 60 months in the treatment group and 52.5 months in the control group (chi2 = 3.274, P > 0.05). The median DFS was 55.0 months in the treatment group and 47.5 months in the control group (chi2 = 10.145, P < 0.01). The DFS rate was 75.9% (41/54) in the treatment group and 54.3% (25/46) in the control group (chi2 = -2.259, P < 0.05). There was statistical difference in the 2-, 3-, and 5-year DFS between the two groups (P < 0.01). There was statistical difference in the 2-year DFS 3-year DFS between stage II and III and stage III (P < 0.05, P < 0.01). There was statistical difference in the ER positive patients between 2-year DFS and 3-year DFS (P < 0.01, P < 0.05). There was statistical difference in the 3-and 5-year distant metastasis rate (DMR) in the treatment group, lower than that of the control group (3.7% vs 31.0%, 20.7% vs 60.7%; P < 0.01). By the end of follow-up, disease progression occurred in 13 cases of the treatment group, local recurrence in 3 cases, single organ metastasis in 7 cases, multi-metastasis in 3 cases, while the corresponding numbers were 21, 1, 11, and 9 in the control group (P < 0.05). As for 1 week before study and at 2-year follow-up using Functional Assessment of Cancer Therapy for Breast Cancer (FACT-B) system, there was statistical difference in the QOL between the two groups (P < 0.05), and better effect was obtained in the treatment group.</p><p><b>CONCLUSION</b>RR, as an assistant therapy, could improve the OS rate, the DFS rate, and the QOL for post-surgical female breast cancer patients in 2 -3 years.</p>

Cardiac electrophysiological differences between Kunming and C57BL6/J mice / 中国医学科学杂志(英文版)

<p><b>OBJECTIVE</b>To investigate the alterations of cardiac electrophysiological properties and substantial mechanism and find the stable arrhythmia mouse model in Kunming (KM) and C57BL6/J (C57) mice.</p><p><b>METHODS</b>Electrocardiogram recordings were used to analyze the QT interval in vivo, and mono- phasic action potential of right and left ventricular epicardium was recorded to elicit changes of action potential duration (APD) in conventional and programmed electrical stimulation (PES). Transient outward potassium current (Ito) was recorded via whole-cell patch-clamp technique in single right and left epicardial myocytes.</p><p><b>RESULTS</b>QT interval was prolonged in KM mice relative to C57 mice (62.51±4.47 ms vs. 52.59±4.85 ms, P<0.05) The APD at 50% repolarization of the left ventricular epicardium (18.60±0.91 ms vs. 12.90±0.35 ms), and APDs at 50% (17.31±6.05 ms vs. 12.00±3.24 ms) and 70% repolarization (36.13±5.32 ms vs. 21.95±8.06 ms) of the right ventricular epicardium in KM mice were more sensitive to PES-induced ventricular tachycardia (25%, 3 of 12 hearts), and especially to Burst-induced ventricular tachycardia (50%, 6 of 12 hearts)compared with C57 mice, which were 20% (2 of 10 hearts) and 30% (3 of 10 hearts) respectively. Ito densities both in the left and right ventricular epicardial myocytes from KM mice were significantly decreased compared with C57 mice, respectively (all P<0.01).</p><p><b>CONCLUSION</b>Our data showed that KM mice with the prolonged QT interval and APD are vulnerabilities to ventricular arrhythmia, which are attributed to lower Ito densities in ventricular myocytes obtained from KM mice than that from C57 mice.</p>

Qianlieping capsule plus alpha-blocker for chronic non-bacterial prostatitis: analysis of 220 cases / 中华男科学杂志

<p><b>OBJECTIVE</b>To investigate the clinical effects of Qianlieping Capsule combined with alpha-receptor blocker tamsulosin on chronic non-bacterial prostatitis (CNBP).</p><p><b>METHODS</b>We assigned 220 CNBP patients to three groups to receive oral Qianlieping Capsule (2.0 g tid) plus alpha-receptor blocker tamsulosin (0.2 mg qd) (n = 98), Qianlieping Capsule alone at 2.0 g tid (n = 66), and tamsulosin alone at 0.2 mg qd (n = 56) , respectively. After 6 weeks of medication, we assessed the therapeutic effects according to the NIH-CPSI scores and the number of small particles of lecithin (SPL) in the prostatic fluid after treatment.</p><p><b>RESULTS</b>Qianlieping Capsule alone increased the number of SPL by 46.9% and reduced the NIH-CPSI score by 24.4%. Combination of Qianlieping and tamsulosin more significantly increased the number of SPL (61.4%) and decreased the NIH-CPSI score (42.3%) than tamsulosin alone (33.7% and 28.6%) (P < 0.01).</p><p><b>CONCLUSION</b>Qianlieping Capsule chronic is effective for chronic non-bacterial prostatitis, and the combination of Qianlieping Capsule with tamsulosin produces even better effect than tamsulosin alone.</p>

Treatment of middle/late stage primary hepatic carcinoma by Chinese medicine comprehensive therapy: A prospective randomized controlled study / 中国结合医学杂志

<p><b>OBJECTIVE</b>To observe the efficacy of Chinese medicine comprehensive therapeutic project in treating the middle/late stage primary hepatic carcinoma (PHC).</p><p><b>METHODS</b>With prospective randomized controlled design, 97 patients with PHC were assigned to the test group (49 cases) treated with Chinese medicine comprehensive therapy using Oleum fructus bruceas intervention combining oral intake of Ganji Decoction and external application of Ailitong, and the control group (48 cases) treated with chemotherapeutic agents combining iodized oil chemo-embolization and analgesics. The immediate and long-term efficacy, adverse reaction, pain-relieving initial time (PRIT) and pain-relieving sustained time (PRST) of the treatment, as well as the change in relieving patients' quality of life (QOL) were observed.</p><p><b>RESULTS</b>The difference between the two groups in illness control rate was statistically insignificant (P>0.05), but the adverse reaction occurrence rate in the test group was lesser than that in the control group (P<0.05). PRIT was insignificantly different in the two groups (P>0.05), but the PRST was significantly superior in the test group than that in the control group (10.37+/-2.18 h vs 7.78+/-1.95 h, P<0.01). After treatment, the increased Karnofsky scores in the test group indicated that the patients' somatic activity, symptoms and QOL were improved significantly, which were significantly superior to those in the control group (P<0.05). The survival rate in the two groups was similar at the 3rd month after treatment, but the test group did show superiority in terms of half- and 1-year survival rate (65.9% vs 42.5% and 38.6% vs 18.1%, respectively, P<0.05). The median survival time in the test group was 8.9 months and that in the control group was 5.3 months.</p><p><b>CONCLUSION</b>Chinese medicine comprehensive therapy is an effective treatment for the middle/late stage patients of PHC, and it could extend the PRST, improve the patients' QOL and long-term survival with less adverse reaction.</p>

A new method for infering vessel structure based on circle detection and Gabor filter / 南方医科大学学报

To automatically infer the patterns of vessel structure such as the distal ends, segments, bifurvessel structures, and crossing of two vessels in X-ray angiographic images, a novel method is presented based on Gabor filter and circle detector. The method can cope with varying vessel curvature and intensity feature occur along the longitudinal vessel direction. The present study can facilitate 2-D quantitative description of vessel tree and 3-D vessel reconstruction, and provide an elementary clue for the diagnostics. The proposed method has been successively applied to both synthetic images for validation purposes and the actual angiographic images, which yielded encouraging results.

Sequence of fat partitioning and its relationship with whole body insulin resistance / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Currently it is unclear whether lipid accumulation occurs in a particular sequence and its relationship with whole body insulin resistance (IR). This study aimed to answer this question.</p><p><b>METHODS</b>Male Sprague-Dawley (SD) rats were fed on a normal or a high-fat diet for 20 weeks. Serum triglycerides (TG), serum free fatty acids (FFA), fasting plasma glucose (FPG), and liver and skeletal muscle TG were measured. The glucose infusion rate (GIR) and mRNA levels of acetyl-CoA carboxylase (ACC) and carnitine palmitoyltransferase-1 (CPT-1) in the liver and skeletal muscle were determined at different stages.</p><p><b>RESULTS</b>Compared with rats fed on the normal diet, serum FFA was not significantly increased in rats fed on the high-fat diet until 20 weeks. In contrast, liver TG was significantly increased by the high-fat diet by four weeks (20-fold; P < 0.01), and remained elevated until the end of the study. However, skeletal muscle TG was not significantly increased by the high-fat diet until 20 weeks (10.6-fold; P < 0.01), and neither was the FPG. The GIR was significantly reduced (1.6-fold; P < 0.01) by the high-fat diet after 8 weeks. The mRNA levels of ACC gradually increased over time and CPT-1 decreased over time, in both the liver and skeletal muscle in rats fed the high-fat diet.</p><p><b>CONCLUSIONS</b>Lipid accumulation in the liver occurs earlier than lipid accumulation in the skeletal muscle. Fatty liver may be one of the early markers of whole body IR. Changes in the gene expression levels of ACC and CPT-1 may have important roles in the process of IR development.</p>

Role and mechanism of uncoupling protein 2 on the fatty acid-induced dysfunction of pancreatic alpha cells in vitro / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Uncoupling protein (UCP) 2 is related to the dysfunction of beta cells induced by fatty acids. However, whether UCP2 has similar effects on alpha cell is still not clear. This study aimed to investigate the effects of UCP2 and its possible mechanisms in lipotoxicity-induced dysfunction of pancreatic alpha cells.</p><p><b>METHODS</b>The alpha TC1-6 cells were used in this study to evaluate the effects of palmitate and/or UCP2 inhibit factors on the glucagon secretory function, glucagon content, the glucagon mRNA level and the nitrotyrosine level in the supernatant. Meantime, the expression levels of UCP2 and peroxisome proliferator-activated receptor-γ coactivator-1 alpha (PGC-1 alpha) were measured by real-time reverse transcription polymerase chain reaction (RT-PCR) and Western blotting. Furthermore, the possible relationship between UCP2 and insulin signal transduction pathway was analyzed.</p><p><b>RESULTS</b>Palmitate stimulated alpha cell glucagon secretion and the expression of UCP2 and PGC-1 alpha, which could be partially decreased by the inhibition of UCP2. Palmitate increased nitrotyrosine level and suppressed insulin signal transduction pathway in alpha cells. Inhibition of UCP2 influenced the effects of free fatty acid on alpha cells and may relate to glucagon secretion.</p><p><b>CONCLUSION</b>UCP2 played an important role on alpha cell dysfunction induced by free fatty acid in vitro, which may be related to its effects on oxidative stress and insulin signal transduction pathway.</p>

Relationship between oxidative stress and beta cell lipoapoptosis in rats / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the effect of beta cell lipoapoptosis after long term high-fat feeding in rats, and to investigate the relationship between oxidative stress, gene expression and beta cell lipoapoptosis.</p><p><b>METHODS</b>Forty-one SD male rats were randomly divided into 2 groups: high-fat diet group (HF group) and control group (NC group). At the end of 28 weeks, the levels of malondialdehyde (MDA) and glutamylcysteinylglycine (GSH) in plasma and pancreatic tissue,the early-phase insulin secretion in beta cells, the beta cell apoptosis (TUNEL technology) and the uncoupling protein 2 (UCP2) gene expression in islets were measured.</p><p><b>RESULT</b>The concentrations of MDA both in plasma and pancreatic tissue were higher in HF group than those in NC group.In contrast, The contents of GSH both in plasma and pancreatic tissue were lower in HF group. Insulin secretion response to glucose load was significantly decreased in HF group (3.0 fold Compared with 5.7 fold, P<0.01). Blood glucose levels at 3 min, 5 min and 10 min during IVGTT were significantly higher in HF group than those in NC group (P<0.05). The frequency of beta cell apoptosis was increased by 40.0% in HF group (P<0.01). The gene expression of UCP2 in islets was increased by 22.4% in HF group (P<0.01).</p><p><b>CONCLUSION</b>The frequency of beta cell apoptosis in high-fat feeding rats is affected by oxidative stress, which results in increasing UCP2 gene expression.</p>

Correlation of the prognosis of chronic prostatitis/chronic pelvic pain syndrome with psychological and other factors: a Cox regression analysis / 中华男科学杂志

<p><b>OBJECTIVE</b>To establish the role of psychological factors in the etiology and symptomatology of chronic prostatitis / chronic pelvic pain syndrome (CP/CPPS), analyze the influence of the psychological obstacles and other relative factors on the prognosis of CP/CPPS by univariate and multivariate Cox regression analyses, and provide a scientific basis for psychotherapy of the problem.</p><p><b>METHODS</b>A total of 291 CP/CPPS patients and 100 normal controls were investigated in age, education, occupation, character, disease course, NIH chronic prostatitis syndrome index (NIH-CPSI) and leukocyte count in EPS and by self-rating anxiety scale (SAS) and self-rating depression scale (SDS) to establish the psychological factors related with CP/CPPS. Then, all the CP/CPPS patients were treated with the same method and followed up for 6 weeks. Based on the therapeutic results, the influence of psychological and other relative factors on the prognosis of CP/CPPS was analyzed with univariate and multivariate Cox regression.</p><p><b>RESULTS</b>All together 258 valid questionnaires were collected from the patients and 87 from the normal controls. Of the 258 CP/CPPS patients, the mean scores on SAS and SDS were 42.8 +/- 11.43 and 48.15 +/- 11.49 respectively, both significantly higher than those of the controls (32.12 +/- 9.68 and 35.12 +/- 10.81) (P < 0.01). The rates of anxiety, depression and anxiety and/or depression in the CP/CPPS group were 25.97, 21.71 and 34.50 % respectively, all significantly higher than in the control group (P < 0.01). The rate of introversion was significantly higher while that of extroversion significantly lower in the former than in the latter (P < 0.01). The total effectiveness rate of treatment was 70.54 % in the CP/CPPS patients. Univariate and multivariate analyses with Cox regression revealed that anxiety, depression and disease course were the definite factors that negatively affected the prognosis of CP/CPPS, while the other factors, such as age, CPSI, character and leukocyte count in EPS had no influence.</p><p><b>CONCLUSION</b>Such psychological obstacles as anxiety and depression play an important role in the pathogenesis, development and prognosis of CP/CPPS. In the treatment of CP/ CPPS, importance should be attached to the patients'psychological status and proper psychological intervention is sometimes necessary.</p>

N-acetyl-l-cysteine improves function of islet beta cell in hyperlipidemic rats and its mechanism / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the effect of N-acetyl-l-cysteine (NAC) on islet beta cell function in hyperlipidemic rats and its mechanism.</p><p><b>METHODS</b>Fifty-nine male SD rats of 8 week old were randomly divided into 3 groups: normal diet group(NC, n=20), high fat diet group (HF, n=20) and NAC treated group (NAC, n=19, NAC 300 mg x kg(-1) x d(-1) and high fat diet). At the end of 20 weeks, fasting serum insulin (Ins), glucose(Glu), malonaldehyde (MDA) and reduced glutathione (GSH) were determined in plasma and pancreas tissue. The glucose infusion rate (GIR) was measured by euglycemic hyperinsulinemia clamp to evaluate the peripheral insulin resistance.Pancreatic islets were isolated and subjected to a perifusion medium containing 3.3 mmol/L glucose for 15 min, followed by 16.7 mmol/L glucose for 30 min, insulin content of perifusion medium was measured by RIA. The expressions of IRS-1, IRS-2, Glut-2 gene in islets were detected by real time PCR.</p><p><b>RESULTS</b>(1)The insulin, glucose and MDA concentration in HF group were higher than those in NC group, but GSH levels in plasma and pancreas were lower. NAC intervention could reverse these effects. (2)The GIR was decreased significantly in HF group compared with NC group [(5.25 +/-1.2) Compared with (13.56 +/-1.7) mg x min(-1) x kg(-1), P<0.01], NAC intervention reversed these effect: GIR[(9.28 +/-1.50) Compared with (5.25 +/-1.2)mg x min(-1) x kg(-1), P<0.01]. (3) 16.7 mmol/L glucose increased the insulin secretion in the islet cells of the three groups, but the peak was lower in HF group. NAC intervention reversed these effects. (4) The gene expression of IRS-1 was significantly decreased by 42.3 % in HF group (P<0.05), and the expressions of IRS-2 and Glut-2 were decreased by 28.1% and 22.9% (P<0.05) compared with NC group. In contrast, the expressions of IRS-1, IRS-2, Glut-2 in NAC group increased by 40.2%, 30.2% and 19.1%, respectively than those in HF group.</p><p><b>CONCLUSION</b>NAC can reverse functional disorder of islet beta cells induced by high-fat-diet feeding. This antioxidant effect might be associated with upgrading gene expression of insulin signal transduction molecules in islet beta cells.</p>

The sequence of fat deposit and its relationship with insulin resistance / 中华内分泌代谢杂志

Objective To observe the sequence of fat deposit and its relationship with insulin resistance in SD rats fed by high fat diet.Methods Normal 8-week-old male SD rats were randomly divided into normal chow (NC,n=40)and high fat diet(HF,n=40)groups.Triglyceride(TG)in serum,liver and muscle were measured;glucose infusion rate(GIR)and the mRNA level of genes related to lipid metabolism in liver and muscle were determined in different stages.GIR was detected by eugiyeemic-hyperinsulinemic clamp for evaluating the insulin sensitivity.Gene expression was determined by real-time PCR.Results(1)As compared with NC group,serum TG was not increased after high fat feeding for4 and 8 weeks,it began to increase after 12 weeks [0.52(0.15-1.00) mmol/L vs O.31(0.09-0.53)retool/L, P0.05)in skeletal muscle.After 8 weeks,the expression of ACC1 in liver in HF group was increased by 20.6%,CPT-1 was decreased by 27.1%(P