OBJECTIVETo explore the effect of polydatin on the growth of TGF-β₁induced humanalveolar epithelium A549 cells and the mechanism of polydatin for inhibiting the process of epithelial-mesenchymal transition (EMT).

METHODSA549 cells in vitro cultured were randomly divided into five groups, i.e., the blank group, the control group, the low dose polydatin group, the middle dose polydatin group, the high dose polydatin group. Common culture fluid was added in A549 cells of the blank group. Five ng/mLTGF-β₁contained culture fluid was added in A549 cells of the control group. 50, 100, and 150 μmol/mL of polydatin plus 5 ng/mL TGF-β₁contained culture fluid was added in A549 cells of low, middle, and high dosepolydatin groups, respectively. Morphological changes were observed and recorded at different time points. The optimal concentration of polydatin was determined by MTT method. Protein and mRNA expressions of E-cad epithelial cell marker) and Vimentin (mesenchymal cell marker) were detected by Western blot and Real-time PCR.

RESULTSUnder inverted phase contrast microscope, A549 cells turned from previous pebble shape to fusiform shape after intervened by polydatin and TGF-β1. The intercellular space was enlargedand the intercellular connection became loose. These phenomena were more obviously seen in the control group. A549 cells were more satiated in low, middle, and high dose polydatin groups than in the control group. The EMT inhibition was most obviously seen in the middle dose polydatin group at 48 h. Protein and mRNA expressions of E-cad showed an overall descending tendency after intervened by polydatin and TGF-β1 (P < 0.05). But compared with the control group, protein and mRNA expressions of E-cad were down-regulated in a lesser amplitude in each intervened group. Besides, the tendency was more obviously seen at 48 h than at 24 h. Protein and mRNA expressions of Vimentin showed an overall up-regulating tendency. But compared with the control group, protein and mRNA expressions of Vimentin were down-regulated in a lesser amplitude in each intervened group. Besides, the tendency was more obviously seen at 48 h than at 24 h (P < 0.05). CONCLUSIONS Polydatin could inhibit TGF-β1 induced EMT process of A549 cells time- and dose-dependently. It also played roles in inhibiting pulmonary fibrosis.

Cadherins ; metabolism ; Cell Line ; Epithelial Cells ; drug effects ; Epithelial-Mesenchymal Transition ; drug effects ; Glucosides ; pharmacology ; Humans ; Stilbenes ; pharmacology ; Transforming Growth Factor beta1 ; pharmacology ; Vimentin ; metabolism

OBJECTIVETo observe the influence of rhubarb on gastrointestinal motility and intestinal mucosal barrier in patients with severe burn.

METHODSThirty patients with severe burn admitted to our burn wards within 48 hours after burn injury from December 2009 to December 2010 were divided into therapeutic group (T, treated with 10 g rhubarb by nasal feeding and 5 g L-glutamine by oral administration beginning from 6 hours after admission, three times per day, and also given enteral nutrition beginning from 24 hours after admission, n = 16) and control group (C, received the same treatment as used in T group but without rhubarb, n = 14) according to the random number table. Gastrointestinal function indexes including restoration of bowel sound within 24 hours, abdominal distension, tolerance to enteral nutrition, and defecation were observed after treatment. The serum samples were harvested on post burn day (PBD) 3, 7, 14 for determination of the levels of gastrin (GAS) by radioimmunoassay, motilin (MTL) by enzyme-linked immunosorbent assay, diamine oxidase (DAO) by enzyme spectrophotometry, and endotoxin (ET) by kinetic turbidimetric assay with TAL. Data were processed with t test and chi-square test.

RESULTSCompared with those in C group, the numbers of patients with restoration of bowel sound within 24 hours and tolerance to enteral nutrition in T group were increased (with chi2 value respectively 5.01, 4.84, P values all below 0.05), the number of patients with abdominal distension was decreased (chi2 = 4.84, P = 0.025). Compared with those of C group, defecation time was earlier, number of bowel movement was increased with soft feces in patients of T group. The serum levels of GAS in T group on PBD 3, 7, 14 [ (92 +/- 26), (95 +/- 16), (98 +/- 18) ng/L] were significantly higher than those in C group [(80 +/- 15), (75 +/- 17), (79 +/- 13) ng/L, with t value respectively 15.352, 22.951, 19.263, P values all below 0.01]. The serum levels of MTL in T group on PBD 3, 7, 14 [(246 +/- 80), (299 +/- 76), (300 +/- 100) ng/L] were significantly higher than those in C group [(189 +/- 44), (203 +/- 64), (200 +/- 67) ng/L, with t value respectively 14.173, 19.294, 26.298, P values all below 0.01]. The serum levels of ET in T group on PBD 3, 7, 14 [(0.398 +/- 0.035), (0.373 +/- 0.005), (0.238 +/- 0.019) EU/mL] were significantly lower than those in C group [(0.493 +/- 0.043), (0.501 +/- 0.045), (0.423 +/- 0.099) EU/mL, with t value respectively 6.213, 9.153, 15.134, P < 0.05 or P < 0.01]. The serum levels of DAO in T group on PBD 3, 7 [ (3.0 +/- 0.4), (2.9 +/- 0.5) U/mL] were significantly lower than those in C group [(3.9 +/- 0.5), (3.6 +/- 0.6) U/mL, with t value respectively 3.982, 4.236, P values all below 0.05], and there was no obvious difference between T and C groups on PBD 14 (t = 1.762, P > 0.05).

CONCLUSIONSRhubarb can protect intestinal mucosal barrier in patients with severe burn through increasing secretion of gastrointestinal hormones and promoting restoration of gastrointestinal motility.

Adolescent ; Adult ; Aged ; Burns ; drug therapy ; physiopathology ; Female ; Gastrointestinal Motility ; Humans ; Intestinal Mucosa ; physiopathology ; Male ; Middle Aged ; Phytotherapy ; Rheum ; Young Adult

Adult ; Carrier Proteins ; metabolism ; Extracellular Matrix Proteins ; metabolism ; Female ; Glycoproteins ; metabolism ; Hepatitis B, Chronic ; metabolism ; pathology ; Humans ; Liver ; metabolism ; pathology ; Male ; Middle Aged

AIMTo investigate the preventive effects of Panax notoginseng saponins (PNS) and Ginkgo biloba extracts (GbE) on acute oxygen toxicity and the possible mechanisms.

METHODSMice were injected intraperitoneally with PNS and GbE for 5 days, then were exposed to 500 kPa hyperbaric oxygen (HBO) for 60 min, the convulsion latency, times and interval were observed. Moreover, reactive oxygen (RO) unit, MDA, NO, GSH levels and GSH-Px, CAT, MAO activities of mice brain were determined after they were exposed to HBO for 15 min.

RESULTSPNS and GbE could markedly prolong the convulsion latency and interval, reduce convulsion times, decrease contents of MDA and NO in mice brain, keep RO unit, GSH and GSH-Px at higher levels, but had no effects on CAT and MAO activities.

CONCLUSIONPNS and GbE could effectively prevent acute oxygen toxicity, which were related to their antioxidant activities.

Animals ; Antioxidants ; pharmacology ; Diving ; adverse effects ; Ginkgo biloba ; Hyperbaric Oxygenation ; adverse effects ; Male ; Mice ; Oxygen ; poisoning ; Panax notoginseng ; Phytotherapy ; Plant Extracts ; pharmacology ; Saponins ; pharmacology

Objective To examine the mortality and risk factors among HIV-infected patients during 1989-2011 in Dehong prefecture,Yunnan province.Methods All HIV-infected patients reported during 1989-2011 in Dehong prefecture who held local residency were included in the study.Mortality rates and cumulative survival rates were calculated.Multiple regression analysis under Cox proportional hazard model was conducted to examine the risk factors for deaths.Results A total of 13 006 HIV-infected patients were included in this study including 73.2％ males,79.1％ peasants and 48.7％ married at the time of reporting.64.5％ of the patients were ethnic minorities,and 68.7％ were illiterate or having received only primary school education.All the patients were followed-up for a total of 55 962.30 person-years with 4648 patients died,with overall mortality rate as 8.31/100person-years.The mortality rate had been increasing from 1990 to 2004 but decreasing since 2005.The average survival time since the identification of HIV infection was 9.48 years overall,and was 16.65 years for those having received antiretroviral treatment (ART) and 7.67 years for those without ART.Data from multiple regression analysis indicated that ART and socio-demographic characteristics such as age,gender,ethnicity,occupation,marital status,education background etc.were significantly associated with death among HIV-infected patients.Conclusion The comprehensive AIDS campaigns including ART had significantly reduced the deaths among HIV-infected patients in Dehong prefecture.More efforts on the scaling up program of ART as well as the enhanced management and follow-up program tailored for HIV-infected patients with different sociodemographic characteristics were needed to further reduce the deaths in the area.

OBJECTIVETo investigate the current situation of the sexual transmission of HIV in Dehong prefecture, analyze the influential factors, and provide support for drafting pertinent preventive interventions in the future.

METHODSWe had analyzed the data of case report from 2005 to 2007, and the prostitutes surveillance data from 2003 to 2007. A special survey was conducted from October 26 to November 7, 2007. Totally 685 people including prostitutes, the clients of prostitutes, people who were HIV positive and their partners, key insiders were interviewed in order to better understand the influential factors related to sexual transmission of HIV.

RESULTSAmong 1636 cases reported from January 1 to September 20, 2007, 52% were infected through sexual transmission. Among 586 cases infected through sexual transmission, 40.6% had commercial sexual behavior and 28.6% had unmarried sexual behavior. And the average rate of condom use was below 30%. The prostitutes' surveillance data from 2003 to 2007 showed that the HIV positive rate in prostitutes was 3.3% - 5.5%. The rate of condom use in the last month was 29.4% - 84.4% during commercial sexual activity, but it was 9.5% - 34.8% with fixed sexual partners. Although the rate of HIV and AIDS-related knowledge among prostitutes was 95.0%, there were still many misunderstanding regarding certain aspects of HIV and AIDS awareness.

CONCLUSIONSexual transmission has become one of the main transmission routes of HIV in Dehong prefecture. The main factors involved in the sexual transmission of HIV in Dehong prefecture might include the wide spreading of sexual services, cohabitation among unmarried couples, having multiple partners, casual sexual behavior, and the low rate of condom use.

Acquired Immunodeficiency Syndrome ; epidemiology ; transmission ; China ; epidemiology ; Disease Notification ; statistics & numerical data ; Female ; Humans ; Male ; Risk Factors ; Sex Work ; Sexually Transmitted Diseases ; epidemiology ; Social Problems

Objective:To analyze the relationship between the high sensitivity C-reactive protein (hs-CRP) and anxiety levels in patients hospitalized with cardiovascular-related diseases and hypertension.Methods:A total of 221 patients hospitalized with cardiovascular-related diseases in the Fuwai Hospital were selected by a voluntary sampling method from September to December 2021. Participants were divided into hypertensive and non-hypertensive groups ( n=119 and n=102) based on the diagnosis of hypertension in their inpatient medical records. Anxiety levels were assessed using the Zung Self-Rating Anxiety Scale, and the levels of serum hs-CRP were estimated by automatic immunoanalyzer. Multivariate logistic regression was used to analyze the relationship between hs-CRP and anxiety. Results:In the hypertensive group, the risk of anxiety in patients with abnormal hs-CRP (>3 mg/L) was 4.239 times (95% CI: 1.569-11.748, P=0.005) higher than those in normal hs-CRP (≤3 mg/L). In turn, compared with patients without anxiety, those with anxiety had 3.878 times greater probability of experiencing abnormal hs-CRP (95% CI: 1.495-10.062, P=0.005), while those with mild anxiety and moderate to severe anxiety had 4.525 times (95% CI: 1.392-14.714, P=0.012) and 3.286 times (95% CI: 0.911-11.357, P=0.070) greater odds of experiencing abnormal hs-CRP, respectively. No similar significant association was seen in the non-hypertensive group. Conclusion:There is an interrelationship between elevated hs-CRP and anxiety in hospitalized patients with cardiovascular-related diseases and hypertension.

Objective To understand the prevalence of HIV infection and its influencing factors in the premarital physical examination population in Dehong Prefecture, Yunnan Province, 2017. Methods The data of people receiving premarital medical examination was collected, the demographic characteristics was described and the related factors was analyzed by Logistic regression. Results There were 21 875 participants receiving premarital medical examination in Dehong. 98(0.45%) participants were confirmed positive for HIV and male infection rate was 0.47% (52/10 955) and female was 0.42% (46/10 920). Among the 98 patients, 20 patients were infected in the first time, and main route was sexual transmission accounting for 81.63% (80/98). Logistic multivariate regression analysis showed that age, ethnicity and drug use were the influencing factors for premarital couples infecting HIV. The risk of HIV infection in 31-40 and 41-50 years old group was higher than the people under 25 years old group(OR=3.78, 95% CI：1.81-7.89, P<0.001；OR=3.95, 95% CI：1.72-9.08, P=0.001). The infection risk of Dai and Jingpo ethnic group was higher than that of the Han ethnic(OR=1.86, 95% CI：1.06-3.29, P=0.031；OR=3.25, 95% CI：1.81-5.84, P<0.001). The risk of infection among drug users was much higher than non-drug users (OR=926.76, 95% CI：271.65-3 161.71, P<0.001). Conclusion Age, ethnicity, and drug use are influencing factors of HIV infection among premarital couples. Targeted measures need to be taken against risk factors. HIV infection is mainly transmitted by sexual transmission. It can be effectively detected and controlled through premarital medical examination.

Objective: To investigate the molecular mechanism of colistin resistance in Klebsiella pneumoniae (K.pneumoniae). Methods: Three clinical isolates of colistin-resistant K. pneumoniae (FK1149, FK1920 and FK1934) and three colistin-resistant mutants (FK660R, FK713R and FK729R) were investigated. Resistance genes of pmrAB, phoPQ, mgrB, crrAB, mcr-1 and mcr-2 were detected by PCR and then analyzed by sequencing. PROVEAN platform was used to predict changes in the biological functions of proteins related to drug resistance. Expression of pmrH, pmrC, mgrB and phoP genes was measured using quantitative real-time PCR. LPS silver staining and conjugation assay were performed to analyze the three clinical colistin-resistant isolates. Results: Amino acid substitutions in PmrA (G53V), PmrB (T157P, R256G), MgrB (F44C) and CrrB (E189K) were detected. ISkpn14 and IS5-like insertion sequences were detected in FK713R and FK729R, respectively. FK1149, FK1920 and FK1934 were negative for mcr genes. Compared with the wild-type strain, expression of pmrH and pmrC genes at the transcriptional level was increased in all investigated isolates. Changes in the expression of phoP and mgrB genes were also observed. A partial deletion of LPS was identified in FK1149. Conclusion LPS modification induced by inactivation of PmrAB or MgrB is the main molecular mechanism of colistin resistance in K. pneumoniae isolates in this study. Mutations in PmrA (G53V), MgrB (F44C) and CrrB (E189K) that might be related to colistin resistance are detected for the first time in clinical isolates of K. pneumoniae.

OBJECTIVETo evaluate the effect of preoperative transarterial chemoembolization (TACE) on hepatocellular carcinoma located in caudate lobe.

METHODSTotally 29 cases of caudate lobe hepatocellular carcinoma admitted from January 2001 to December 2010 were analyzed retrospectively. Among the 29 patients, 23 were male and the other 6 were female. The median age was 52 years. According to receiving preoperative TACE or not, the 29 cases were divided into two groups: preoperative TACE plus surgery (group A, n = 11) and surgery only (group B, n = 18). The surgical results and long-term survival were compared between two groups.

RESULTSAfter TACE, the diameter of the tumour reduced by over 33.3% in 3 patients, 10.0% to 33.3% in 6 patients, and less than 10.0% in 2 patients. The duration of surgery and intraoperative blood loss in group A were (298 ± 39) minutes and (1031 ± 310) ml, respectively. The duration of surgery and intraoperative blood loss in group B were (281 ± 54) minutes and (868 ± 403) ml, respectively. No significant difference was found in terms of these two groups (t = 1.006, P = 0.324; t = 1.223, P = 0.232). In addition, 6 cases in group A developed complications and 4 cases in group B did so. Only one patient died because of postoperative complication, and this patient belonged to group A. No significant difference was found between two groups (χ(2) = 0.028, P = 0.868; χ(2) = 0.633, P = 0.426). The 5-year survival rate was 56.8% in group A and 34.9% in group B. The difference did not reach significant difference (P = 0.132).

CONCLUSIONSFor hepatocellular carcinoma located in caudate lobe, preoperative TACE does not significantly increase the surgical difficulty and impair the safety. In addition, preoperative TACE has the tendency to provide benefit to long-term survival.

Carcinoma, Hepatocellular ; surgery ; Chemoembolization, Therapeutic ; Hepatectomy ; Humans ; Liver Neoplasms ; surgery ; Retrospective Studies