Investigation on knowledge, attitude and practice on e-cigarette use among college students in Guiyang City / 预防医学

Objective @#To investigate the knowledge, attitude and practice on e-cigarette use among college students in Guiyang City, so as to provide insights into tobacco control health education among colleges and universities. Methods College students were sampled from full-time colleges and universities in Guiyang City using a multi-stage stratified cluster sampling method from March to May in 2022. Students' knowledge, attitude and practice on e-cigarette use were collected using a questionnaire designed based on the 2019 China National Youth Tobacco Survey Questionnaire, and factors affecting the attempt to use e-cigarette were identified using a multivariable logistic regression model. @* Methods@# College students were sampled from full-time colleges and universities in Guiyang City using a multi-stage stratified cluster sampling method from March to May in 2022. Students' knowledge, attitude and practice on e-cigarette use were collected using a questionnaire designed based on the 2019 China National Youth Tobacco Survey Questionnaire, and factors affecting the attempt to use e-cigarette were identified using a multivariable logistic regression model. @* Results @#Totally 2 800 questionnaires were recovered, including 2 694 valid questionnaires, with an effective recovery rate of 96.21%. The respondents included 687 males (25.50%) and 2 007 females (74.50%). The total score of knowledge on e-cigarette use was (2.95±1.02) points, and there were low proportions of knowing that e-cigarettes contained hazardous substances, including nicotine and tar (59.06%) and knowing that e-cigarette use may cause diseases (53.27%). The total score of attitudes towards e-cigarette use was (5.09±2.36) points, and 93.50% of respondents did not use e-cigarettes given by companions. There were 132 students with attempts to use e-cigarettes (4.90%), and there were 29 current e-cigarette users (1.08%). Multivariable logistic regression analysis identified age of 20 years and lower (OR=0.438, 95%CI: 0.267-0.719), living in rural areas (OR=0.458, 95%CI: 0.264-0.794), thinking that e-cigarettes are addictive (OR=0.449, 95%CI: 0.217-0.928), and thinking that e-cigarette smoking is harmful (OR=0.263, 95%CI: 0.131-0.527) as factors protecting from e-cigarette use, and monthly living expenses of more than 2 000 Yuan (OR=2.995, 95%CI: 1.135-7.902), cigarette smoking (OR=19.826, 95%CI: 11.385-34.527), and using companions' e-cigarettes (OR=9.141, 95%CI: 5.534-15.101) and thinking that people around me support my use of e-cigarettes (OR=2.673, 95%CI: 1.426-5.013) were risk factors for e-cigarette use among college students. @* Conclusions @#There is a low awareness rate of e-cigarette use among college students in Guiyang City, and the majority oppose e-cigarette use, with a low proportion of attempt to use e-cigarettes. Age, source of students, monthly living expenses, e-cigarette smoking, knowledge on e-cigarette use and use of companions' e-cigarettes may affect the attempt to use e-cigarettes.

The therapeutic efficacy of compound lidocaine cream on psoriasis / 药学学报

Psoriasis is a non-infectious chronic inflammatory skin disease. It′s acknowledged that interleukin (IL)-17 signaling pathway dominantly drives the development of psoriasis. Recently, the role of neuro-immune axis in psoriasis has attracted widespread attention. Lidocaine, a local anesthetic, has ability to block the conduction of nerve impulses, while its therapeutic efficacy on psoriasis remains to be confirmed. Here, we evaluated the therapeutic efficacy of topical application of compound lidocaine cream (LIDO) on imiquimod (IMQ)-induced mouse psoriasis model. Animal welfare and experimental procedures follow the regulations of the Ethics Committee of China Pharmaceutical University. The psoriasis area and severity index (PASI) scoring was used to evaluate the severity of psoriasis-like symptoms. Hematoxylin-eosin staining was used to examine histopathological changes and epidermal thickness was measured. Ki67 immunofluorescence staining was used to evaluate the proliferation of keratinocytes. The relative mRNA expression of inflammatory cytokines (including Il17, Il22, Il23 and Il36) in skin was measured by real-time quantitative PCR. Results show that IMQ-induced increases in the PASI score, epidermal thickness, number of Ki67+ cells and the mRNA expression of inflammatory cytokines are significantly alleviated by topical application of LIDO, whose therapeutic efficacy is also better than that of the positive control drug calcipotriol. Our study suggests that LIDO could be used for psoriasis treatment.

Acute inferior myocardial infarction combined with papillary muscle rupture: A case report / 中南大学学报(医学版)

The incidence of acute myocardial infarction (AMI) is increasing. Acute papillary muscle rupture is one of the serious and rare mechanical complications of AMI, which occurs mostly in inferior and posterior myocardial infarction. A patient with acute inferior myocardial infarction developed pulmonary edema and refractory shock, followed by cardiac arrest. After cardiopulmonary resuscitation (CPR), revascularization of criminal vessels was carried out by emergency percutaneous transluminal coronary angioplasty (PTCA) under the support of intra-aortic balloon pump (IABP) and extra corporeal membrane oxygenation (ECMO). Although the patient was given a chance for surgery, his family gave up treatment due to unsuccessful brain resuscitation. It reminds that mechanical complications such as acute papillary muscle rupture, valvular dysfunction and rupture of the heart should be highly suspected when cardiogenic pulmonary edema and cardiogenic shock are difficult to correct in acute inferior myocardial infarction. Echocardiogram and surgery should be put forward when revascularization of criminal vessels is available.

Establishment and validation of a preoperative nomogram model for predicting the risk of hepatocellular carcinoma with microvascular invasion / 中华外科杂志

Objective: To establish and validate a nomogram model for predicting the risk of microvascular invasion(MVI) in hepatocellular carcinoma. Methods: The clinical data of 210 patients with hepatocellular carcinoma who underwent hepatectomy at Department of Hepatobiliary and Pancreatic Surgery,the Affiliated Hospital of Qingdao University from January 2013 to October 2021 were retrospectively analyzed. There were 169 males and 41 females, aged(M(IQR)) 57(12)years(range:30 to 80 years). The patients were divided into model group(the first 170 cases) and validation group(the last 40 cases) according to visit time. Based on the clinical data of the model group,rank-sum test and multivariate Logistic regression analysis were used to screen out the independent related factors of MVI. R software was used to establish a nomogram model to predict the preoperative MVI risk of hepatocellular carcinoma,and the validation group data were used for external validation. Results: Based on the modeling group data,the receiver operating characteristic curve was used to determine that cut-off value of DeRitis ratio,γ-glutamyltransferase(GGT) concentration,the inverse number of activated peripheral blood T cell ratio (-aPBTLR) and the maximum tumor diameter for predicting MVI, which was 0.95((area under curve, AUC)=0.634, 95%CI: 0.549 to 0.719), 38.2 U/L(AUC=0.604, 95%CI: 0.518 to 0.689),-6.05%(AUC=0.660, 95%CI: 0.578 to 0.742),4 cm(AUC=0.618, 95%CI: 0.533 to 0.703), respectively. Univariate and multivariate Logistic regression analysis showed that DeRitis≥0.95,GGT concentration ≥38.2 U/L,-aPBTLR>-6.05% and the maximum tumor diameter ≥4 cm were independent related factors for MVI in hepatocellular carcinoma patients(all P<0.05). The nomogram prediction model based on the above four factors established by R software has good prediction efficiency. The C-index was 0.758 and 0.751 in the model group and the validation group,respectively. Decision curve analysis and clinical impact curve showed that the nomogram model had good clinical benefits. Conclusions: DeRitis ratio,serum GGT concentration,-aPBTLR and the maximum tumor diameter are valuable factors for preoperative prediction of hepatocellular carcinoma with MVI. A relatively reliable nomogram prediction model could be established on them.

Anti-cutaneous squamous cell carcinoma effect and mechanism of dihydrochromone-spliced polycyclic pyrrole-spiroepoxidole compound 3m / 中国药房

OBJECTIVE To study the effect and mechanism of dihydrochromone-spliced polycyclic pyrrole-spiroepoxidole compound 3m on cutaneous squamous cell carcinoma. METHODS Using human cutaneous squamous cell carcinoma A431 and Colo-16 cells as research subjects， CCK-8 assay was used to detect the effects of different concentrations of 3m （5， 10， 20， 40， 80 μmol/L） on the proliferation of A431 and Colo-16 cells after 24， 48 and 72 hours； the median inhibitory concentration （IC50） was calculated at 48 h of treatment. A431 and Colo-16 cells were divided into control group， 3m low-concentration and high- concentration groups （15， 30 μmol/L）. After treated with relevant drugs or culture medium for 48 h， the morphological changes of cells in each group were observed by inverted microscope. Clone formation rate， migration rate and number of cell invasions， cell cycle distribution and apoptosis rate were detected. The phosphorylation， or expression of Janus kinase 2/signal transducer and activator of transcription 3 （JAK2/STAT3） signaling pathway related proteins [JAK2， STAT3， B-cell lymphocyte-2 （Bcl-2）， Bcl-2- associated X protein （Bax）]， and their mRNA expression in cells were detected. RESULTS 3m could significantly inhibit the proliferation of A431 and Colo-16 cells after treated for 24， 48， 72 h （P＜0.01）， and IC50 of them were 20.36， 23.72 μmol/L， respectively. After 48 hours of treatment， compared with control group， A431 and Colo-16 cells arranged sparsely and loosely connected in 3m low-concentration and high-concentration groups. The clone formation rate， migration rate， number of cell invasions， mRNA expressions of JAK2， STAT3 and Bcl-2， the phosphorylation of JAK2 and STAT3， protein expression of Bcl-2 were significantly decreased/weakened （P＜0.01）. Proportion of cell cycle in G2 phase， apoptosis rate， protein and mRNA expression of Bax were increased significantly （P＜0.01）； and all the above effects were in dose-dependent manner. CONCLUSIONS 3m can inhibit the proliferation， clone formation， migration and invasion abilities of cutaneous squamous cell carcinoma A431 and Colo-16 cells in a dose-dependent manner， the mechanism of which may be associated with inhibiting the activity of JAK2/STAT3 signaling pathway， and inducing cell apoptosis.

Research on the reform of position setting and performance evaluation in medical research institutes under the background of institute integration / 中华医学科研管理杂志

Objective:To explore the collaborative innovation development mechanism of hospitals and research institutes, fully integrate the institute personnel with hospitals, and conduct classified management and performance appraisal, promoting the integrated development of hospitals and research institutes.Methods:The idea of personnel classification, the establishment of an integrated research team, and technical team groupings and service directions were determined through key informant interviews, research ability and technical strength surveys, and other research methods; The performance appraisal scheme of research teams were established by using literature analysis and optimization and Delphi expert investigation; The platform team assessment programs were established by qualitative research methods.Results:Built a position setting framework for research institutes, formed hospital-institute integrated research teams around the hospital's clinical advantageous disciplines with researchers and clinical staff, set up platform teams based on existing equipment and technicians′ specialties, established a performance appraisal scheme for research teams based on Science and Technology Evaluation Metrics(STEM), determined a full-dimensional comprehensive performance evaluation scheme for the technology platforms based on service volume and quality.Conclusions:This study formulated a set of position setting and performance evaluation schemes that fit with the current situation of municipal research institutes, and explored a new scientific research cooperation mechanism of resource sharing, team co-construction, and technology sharing, which can provide a certain reference value for the reform of other medical research institutes.

Analysis of peripheral blood lymphocyte status in low-level-viremia patients with chronic hepatitis B virus infection after nucleos(t)ide analogue treatment / 中华微生物学和免疫学杂志

Objective:To evaluate the status of T, B and NK lymphocytes in peripheral blood of patients with chronic hepatitis B virus(HBV) infection and low-level viremia after nucleos(t)ide analogue (NA) treatment and to provide ideas for solving low-level viremia.Methods:This retrospective study involved 344 patients with chronic HBV infection who had been treated with NAs. They were divided into two groups: low-level viremia group (LLV group) and complete virological response group (CVR group). Clinical data including basic information, biochemistry and coagulation test results, HBV DNA, peripheral blood lymphocyte counts, PD1 and CD28 expression by T lymphocytes, and perforin and granzyme B expression by NK lymphocytes were collected and compared between the two groups. Propensity matching analysis was performed to verify the accuracy of the results.Results:Among the 344 cases, 162 were in the LLV group and 182 in the CVR group. There were no significant differences in disease diagnosis, alanine aminotransferase (ALT), aspartate aminotransferase (AST) or albumin (ALB) level between the two groups ( P>0.05), but the differences in gender and age were statistically significant ( P<0.05). The differences in the counts and percentages of peripheral blood CD3 +, CD4 + and CD8 + T lymphocyte and CD4 + /CD8 + ratios between the two groups were not statistically significant ( P>0.05), but the expression of PD1 and CD28 by peripheral blood CD3 +, CD4 + and CD8 + T lymphocytes was higher in the LLV group than in the CVR group ( P<0.05). The count of peripheral blood CD19 + B lymphocytes in the LLV group was higher than that in the CVR group ( P>0.05), and the percentage of peripheral blood CD19 + B lymphocytes was also higher in the LLV group ( P<0.05). The count of peripheral blood CD16 + CD56 + NK lymphocytes and the expression of perforin in the LLV group were lower than those in the CVR group ( P>0.05). The percentage of peripheral blood CD16 + CD56 + NK lymphocytes and the expression of granzyme B in the LLV group were lower than those in the CVR group ( P<0.05). After propensity score matching, 108 cases in the LLV group and 108 cases in the CVR group showed no significant differences in basic information ( P>0.05); the percentage of CD4 + T lymphocytes and CD4 + /CD8 + ratio in peripheral blood T lymphocyte subsets were higher in the LLV group than in the CVR group, while the percentage of CD8 + lymphocytes was lower in the LLV group ( P<0.05); the expression of PD1 and CD28 by CD3 +, CD4 + and CD8 + T lymphocytes remained higher in the LLV group ( P<0.05); the differences in the counts and percentages of peripheral blood CD19 + B lymphocytes as well as CD16 + CD56 + NK lymphocytes between the two groups were not statistically significant ( P>0.05); no significant difference in the expression of perforin by CD16 + CD56 + NK lymphocytes was found between the two groups ( P>0.05), and the expression of granzyme B remained lower in the LLV group ( P<0.05). Conclusions:Abnormal number and function of T lymphocytes and decreased function of NK lymphocytes might be related to the development of LLV in patients with chronic HBV infection after treatment. Therefore, in addition to adjusting NAs, targeting of T and NK lymphocytes might also be a feasible measure for future LLV treatment.

Clinical characteristics of hospitalized premenopausal patients with hyperuricemia / 中华全科医师杂志

Objective:To analyze the clinical characteristics of hospitalized premenopausal patients with hyperuricemia.Methods:The medical records of premenopausal women with hyperuricemia (serum uric acid ≥360 μmol/L during hospitalization) admitted in Peking Union Medical College Hospital from 2013 to 2018 were reviewed and the clinical data were analyzed.Results:A total of 2 099 patients were enrolled. Only 14.01% (294 cases) of the patients were concerned about hyperuricemia by physicians. Autoimmune diseases (32.11%, 674 cases), nephrotic disease (19.29%, 405 cases) and endocrine system diseases (9.72%, 204 cases) are the main reasons for hospitalization, while 6.34%(133 cases) of patients were in gestation. In terms of the etiology, renal diseases (49.35%, 1 035 cases), specific drug use (49.26%, 1 034 cases) were the main causes of secondary hyperuricemia in premenopausal women, followed by metabolic diseases (10.62%, 233 cases). There was no significant difference in serum uric acid level among premenopausal women of different ages ( H=4.47, P=0.107), but the etiology of hyperuricemia among patients of different ages had significant differences. The proportion of hyperuricemia in patients with cancer and metabolic syndrome,secondary to use of diuretics and anti-tuberculosis drugs had differences among different age groups ( χ2=90.96,52.89,19.26 and 6.41, P<0.05). Conclusion:Hyperuricemia is not uncommon in premenopausal women. There are many secondary factors leading to hyperuricemia in premenopausal women, among which drugs and renal lesions are the main causes. In addition, the secondary factors in women with hyperuricemia has differences among different age groups.

Short-term exposure to gossypol causes reversible reproductive toxicity and nephrotoxicity in mice / 南方医科大学学报

OBJECTIVE@#To study the toxic effects of short-term exposure to gossypol on the testis and kidney in mice and whether these effects are reversible.@*METHODS@#Twenty 7 to 8-week-old male mice were randomized into blank control group, solvent control group, gossypol treatment group and drug withdrawal group. In the former 3 groups, the mice were subjected to daily intragastric administration of 0.3 mL of purified water, 1% sodium carboxymethylcellulose solution, and 30 mg/mL gossypol solution for 14 days, respectively; In the drug withdrawal group, the mice were treated with gossypol solution in the same manner for 14 days followed by treatment with purified water for another 14 days. After the last administration, the mice were euthanized and tissue samples were collected. The testicular tissue was weighed and observed microscopically with HE and PAS staining; the kidney tissue was stained with HE and examined for mitochondrial ATPase activity.@*RESULTS@#Compared with those in the control group, the mice with gossypol exposure showed reduced testicular seminiferous epithelial cells with rounded seminiferous tubules, enlarged space between the seminiferous tubules, interstitium atrophy of the testis, and incomplete differentiation of the spermatogonia. The gossypol-treated mice also presented with complete, non-elongated spermatids, a large number of cells in the state of round spermatids, and negativity for acrosome PAS reaction; diffuse renal mesangial cell hyperplasia, increased mesangial matrix, and adhesion of the mesangium to the wall of the renal capsule were observed, with significantly shrinkage or even absence of the lumens of the renal capsules and reduced kidney mitochondrial ATPase activity. Compared with the gossypol-treated mice, the mice in the drug withdrawal group showed obvious recovery of morphologies of the testis and the kidney, acrosome PAS reaction and mitochondrial ATPase activity.@*CONCLUSIONS@#Shortterm treatment with gossypol can cause reproductive toxicity and nephrotoxicity in mice, but these toxic effects can be reversed after drug withdrawal.

Research progress on the molecular regulatory mechanism of exosome biogenesis / 中华危重病急救医学

Exosomes are small vesicles with a diameter of about 40-160 nm actively secreted by cells. They participate in a variety of pathophysiological processes and are closely related to the occurrence and development of diseases. As a newly carrier of intercellular communication and circulating biomarkers of disease diagnosis and prognosis, exosomes have attracted great attention for their potential clinical applications. However, many aspects such as exosome biogenesis, targeted transport, and mechanism of action are still unclear. This paper focuses on the exosome biogenesis, summarizes the exosome biogenesis pathways, and describes relevant molecular modulation mechanisms of importance. And this review provides a theoretical basis for disease treatment based on regulating exosome production.

Establishment of content determination of 5 saponins in Huoxue zhitong capsules/tablets and confirmation of illegal addition / 中国药房

OBJECTIVE To establish a method for simultaneous determination of 5 saponins in Huoxue zhitong capsules/ tablets and to confirm the illegal addition of Panax ginseng ，Panax quiquefolium and stems and leaves of Panax notoginseng . METHODS Ultra-high performance liquid chromatography tandem mass spectrometry was used . The Agilent RRHD Eclipse Plus C18 column was used with mobile phase of water （containing 0.1% formic acid ）-acetonitrile for gradient elution at a flow rate of 0.35 mL/min. The column temperature was 35 ℃andthesamplesizewas 2 μL. Using electrospray ionization source ，negative ion scanning was carried out in multi -reaction monitoring mode . RESULTS The linear ranges of notoginsenoside R 1，ginsenoside Rb 1， ginsenoside Rg 1，ginsenoside Rd ，ginsenoside Re ，ginsenoside Rf （an unique ingredient of P. ginseng），ginsenoside Rb （3 an unique ingredient of stems and leaves of P. notoginseng）and pseudo -ginsenoside F 11（an unique ingredient of P. quiquefolium）were 9.99- 1 499.50，9.99-1 499.50，10.01-1 500.80，9.99-1 499.10，10.00-1 500.20，9.99-1 499.50，10.01-1 500.80，9.99-1 499.00 ng/mL （R2＞0.997）；the detection limits and the quantitative limits were not higher than 2.64 and 8.06 ng/mL，respectively. RSDs of precision，repeatability and stability （24 h）tests were all less than 6%. The average recoveries of saponins in capsules and tablets were 98.72%-102.40% and 95.18%-106.47%，respectively（all RSDs ＜5%，n＝6）. In 18 batches of Huoxue zhitong capsules ，the contents of ginsenoside Re ，ginsenoside Rd ，ginsenoside Rg 1，notoginsenoside R 1 and ginsenoside Rb 1 were 291.79-426.89，427.71- 677.49，2 294.28-3 371.43，571.22-848.19 and 1 841.33-2 959.12 μg/g，respectively；the contents of ginsenoside Rb 3 were no more than 45.02 μg/g. In 22 batches of Huoxue zhitong tablets，the contents of above indicators of P. notoginseng were 44.11-393.83，80.48-549.55，393.36-3 548.57，79.83- 872.60，and 288.64-2 912.66 μg/g，respectively；the contents of ginsenoside Rb 3 were no more than 44.79 μg/g. Ginsenoside Rf and pseudo -ginsenoside F 11 were not detected in the two preparations. CONCLUSIONS The method can be used to determine the contents of saponins in Huoxue zhitong preparations . No illegal addition of P. ginseng and P. quiquefolium are found in 40 batches of preparations ，but the input of P. notoginseng in some batches of tablet samples is less .

Extracorporeal shock waves promote the repair of injured muscle tissue by regulating insulin-like growth factor-1 and phosphorylated protein kinase B levels / 中华物理医学与康复杂志

Objective:To determine whether or not shock wave therapy promotes the repair of muscle injury by regulating insulin-like growth factor-1 (IGF-1) and/or the phosphorylation of protein kinase B (p-Akt).Methods:Sixty-six adult male Sprague-Dawley rats were randomly divided into a normal group, a model group and a treatment group. A custom-made striker was used to induce blunt contusion in the gastrocnemius muscles of the rats of the model and treatment groups. The normal and model groups were then not given any therapeutic intervention. Twenty-four hours later, the treatment group underwent 500-impulse shockwave treatment at 0.14mJ/mm 2 and 10Hz. That was repeated 4 days later. The injured muscle was sampled on the 1st, 3rd, 5th, and 7th day after modeling. Hematoxylin and eosin staining was applied to observe the arrangement of muscle fibers, and the expressions of myostatin, myogenic differentiation antigen 1 (MYOD1), IGF-1 and p-AKTs473 were detected by immunohistochemistry and western blotting. Results:(1) The staining showed that in the model group the space between the muscle cells was larger than in the normal group. In the treatment group there were more newly-formed mononuclear or multinucleated muscle tubes. The regeneration of skeletal muscle in the treatment group was superior to that in the model group at the same time points. (2) The average myostatin expression of the model group increased significantly compared with the normal group at all the time points, while that of the treatment group had decreased significantly compared with the model group. Moreover, no significant differences were found on the 7th day between the treatment and normal groups. (3) Western blotting showed that the expression of MyoD1 in the model group was significantly higher than that in the normal group on days 1 and 3, and the expression of MyoD1 in the treatment group was significantly higher than in the model group. The expression levels of IGF-1 and P-AKTS473 in the model group were higher than those in the normal group at the same time point, and the expression levels in the treatment group were significantly higher than those in the model group.Conclusion:Extracorporeal shock wave therapy can promote the regeneration and repair of skeletal muscle by regulating IGF-1 and p-AKT levels.

Impact of COVID-19 epidemic on medical students′ career perspectives: a qualitative study / 中华全科医师杂志

Objective:To explore the impact of Coronavirus disease 2019 (COVID-19) epidemic on career choosing perspective among medical students and to analyze the related factors.Methods:Semi-structured telephone interviews were conducted during March 1-25 2020 among 19 medical students of 8-year program from Peking Union Medical College. The grounded theory and thematic analysis were applied to code the data and identify categories and factors.Results:Among the 19 respondents aged 19-26 years, 9 were males and 10 were female; 10 were at the clinical stage, and 9 were at the premedical stage; 3 respondents had family members involved in medical profession. Thematic analysis identified 6 main categories that affect the variability of medical students' career prospects under the COVID-19 pandemic. The 6 themes were individual characteristics of students; occupational characteristics; systemic factors; COVID-19 events; stressors of physicians and influence of job satisfaction.The outbreak affected everyone's mind of future career to varying degrees. The participants had been exposed to more negative aspects, while only one participant changed her career intention. There were conflicting views on whether to choose some specialties in future, such as respiratory medicine, infectious disease and critical care medicine. The participants feel more pressure as a doctor from the attitude of the public. Almost all participants mentioned feeling unsafe due to the high risk of occupational exposure and doctor-patient relationships. Most valued the support from their family, faculty, classmates, and volunteers. Many participants expressed their hope to improve the medical policies and systems.Conclusions:The influence of COVID-19 outbreak on medical students' career choosing can be positive as well as negative in different degrees. However, we found no evidence that it altered their perspectives substantially.

Analysis of unknown-origin fever after simultaneous pancreas-kidney transplantation / 中华器官移植杂志

Objective:To explore the clinical features, etiologies and outcomes of unknown origin fever after simultaneous pancreas-kidney transplantation(SPK).Methods:From March 2015 to January 2020, clinical data were retrospectively reviewed for 120 SPK recipients.According to the definite evidence of fever, such as microbial culture, imaging findings or rejection, they were divided into three groups of free-fever(FF, n=41)and defined-fever(DF, n=47)and fever of unknown origin(FUO, n=32). The differences in general clinical features, surgical complications, laboratory tests and prognoses were compared.Logistic regression was employed for analyzing the risk factors of FUO and Kapla-Meier for survival analysis.And P<0.05 was deemed as statistically significant. Results:Multivariate analysis revealed that preoperative diabetic gastroenteropathy was an independent risk factor for unexplained fever.Significant differences existed between FUO and DF groups in leucocyte count[6.50(5.13, 7.36)vs.10.36(6.11, 12.97)×10 9/L], C-reactive protein(CRP)[11.75(6.25, 16.85)vs.35.00(16.30, 75.00)μg/ml], procalcitonin[0.13(0.06, 0.18)vs.0.19(0.11, 1.05)ng/ml]( P<0.001, P<0.001, P=0.025). As compared with DF group, 19 recipients in FUO group only received 1-2 antibiotics and there was a shorter course of treatment[13(40.6%)vs.32(68.1%), P=0.016]. For 6(18.7%)recipients after a diagnosis of FUO, clinical outcome was achieved with only NSAIDs.Length of stay was(48.72±19.51)days in FUO group versus(57.36±27.46)days in DF group and the difference was statistically significant( P<0.001). Hospitalization expenses of two groups were 253 463.25 and 334 605.96 yuan respectively and the difference was also statistically significant( P=0.002). Conclusions:Diabetic gastroenteropathy is an independent risk factor for early FUO after SPK transplantation.Inflammatory markers of leukocytes, CRP and procalcitonin in FUO patients are significantly lower than DF group.And these clinical features can help diagnose FUO in an early stage.

Relationship between pancreatic fibrotic markers and glycated hemoglobin levels in patients with type 3c diabetes mellitus secondary to chronic pancreatitis / 中华胰腺病杂志

Objective:To investigate the relationship between pancreatic fibrotic marker transforming growth factor-β(TGF-β) and platelet derived growth factor-BB(PDGF-BB) and serum glycated hemoglobin (HbA1c) levels in patients with type 3c diabetes mellitus secondary to chronic pancreatitis(CP-T3cDM).Methods:The clinical data of 39 patients with CP-T3cDM admitted to the Department of Gastroenterology of the First Affiliated Hospital of Naval Medical University between February 2018 and August 2020 were collected, and the patients' age, gender, body mass index, duration of chronic pancreatitis and diabetes mellitus, smoking history, alcohol consumption history, serum HbA1c level at admission, degree of pancreatic atrophy, morphology of the main pancreatic duct, and treatment of diabetes mellitus were recorded. Serum TGF-β and PDGF-BB were detected by ELISA. Patients were divided into high and low level group according to the median TGF-β and PDGF-BB levels, respectively. Clinical characteristics of patients were compared between the TGF-β and PDGF-BB high and low level group. The correlation between TGF-β, PDGF-BB and HbA1c was analyzed by Spearman's correlation analysis.Results:A total of 39 CP-T3cDM patients were included; 35 were male and 4 were female. The age of first onset of chronic pancreatitis was (42±14) years old, and the duration of diabetes mellitus was 24(4, 36) months. The serum HbA1c level was (7.8±1.6)%, and the serum TGF-β and PDGF-BB levels were 20.5(10.5, 43.1) and 647.5(276.9, 1349.2)pg/ml, respectively. The serum HbA1c levels of patients in the high-level group of serum TGF-β and PDGF-BB were significantly higher than those in the corresponding low-level group [8.6%(7.4%, 9.9%) vs 6.7%(6.2%, 7.8%) and 8.6%(7.4%, 9.6%) vs 6.7%(6.1%, 7.8%), respectively] , and the difference was statistically different (both P value <0.01), while none of other indicators showed statistically significant differences between both groups. The correlation analysis showed that the levels of TGF-β and PDGF-BB were significantly positively correlated with HbA1c level ( r=0.45, 0.53, both P value <0.01). Conclusions:Increased pancreatic fibrosis in patients with CP-T3cDM was an important factor contributing to elevated blood glucose level. Patients with higher serum pancreatic fibrotic factors exhibited a significant increase in HbA1c level.

Effects of ultrasound-guided nerve block combined with dexmedetomidine on postoperative oxidative stress in patients with hip fracture and diabetes / 中国医师进修杂志

Objective:To explore the effect of ultrasound-guided nerve block combined with dexmedetomidine (DEX) on postoperative oxidative stress in patients with hip fracture and diabetes.Methods:From March 2017 to December 2019, 78 patients with diabetes who underwent hip fracture surgery were enrolled and divided into two groups by random number table method, with 39 cases in each group. After the operation, the control group was treated with ultrasound-guided femoral nerve combined with lateral femoral cutaneous nerve block with 0.375% ropivacaine, and the study group was treated with ultrasound-guided femoral nerve combined with lateral femoral cutaneous nerve block with 0.375% ropivacaine and DEX 0.5 μg/kg. Patients in both groups were received patient controlling intravenous analgesia (PCIA) after the operation, and visual analogue scoring (VAS) was used to evaluate the resting pain score of the patients at 4 h (T 1), 8 h (T 2), 16 h (T 3), 24 h (T 4), 36 h (T 5) and 48 h after operation (T 6). The levels of serum superoxide dismutase (SOD), malondialdehyde (MDA), 8-hydroxydeoxyuridine (8-OHdG), at T 1 and T 6 were compared between the two groups. The management system of continuous glucose monitoring system (CGMS) was used to calculate the mean amplitude of glycemic excursions(MAGE), largest amplitude of glycemic excursions (LAGE), absolute means of daily differences (MODD) of the patients during 48 h after operation, and the correlation between the blood glucose fluctuation indicators and the oxidative stress of the study group were compared. Results:The scores of VAS in the study group at T 1-T 6 were lower than those in the control group , the difference were statistically significant ( P<0.05). At T 6, the level of serum SOD in the study group was higher than that in the control group: (79.58 ± 13.55) kU/L vs. (64.16 ± 11.95) kU/L; the level of serum MDA and 8-OhdG in the study group were higher than those in the control group: (4.36 ± 0.81) μmol/L vs. (5.64 ± 0.94) μmol/L, (1.06 ± 0.19) μg/L vs.(1.42 ± 0.22) μg/L, the differences were statistically significant ( P<0.05). The levels of MAGE, LAGE, MODD in the study group were lower than those in the control group: (2.42 ± 0.47) mmol/L vs. (5.19 ± 0.96) mmol/L, (3.47 ± 0.64) mmol/L vs. (7.61 ± 1.32) mmol/L, (1.21 ± 0.27) mmol/L vs. (2.74 ± 0.46) mmol/L, the differences were statistically significant ( P<0.05). The correlation analysis showed that the blood glucose fluctuation indicators MAGE, LAGE and MODD of the study group were negatively correlated with SOD, and were positively correlated with MDA, 8-OHdG ( P<0.05). Conclusions:The use of ultrasound-guided nerve block combined with dexmedetomidine (DEX) for patients with hip fracture and diabetes can improve the analgesic effect, reduce oxidative stress of the patients, and improve the blood glucose fluctuation indicators.

Prokaryotic expression of a recombinant protein of adeno-associated virus capsid conserved regions and preparation of its polyclonal antibody / 南方医科大学学报

OBJECTIVE@#To express and purify the antigenic peptide of adeno-associated virus (AAV) capsid conserved regions in prokaryotic cells and prepare its rabbit polyclonal antibody.@*METHODS@#The DNA sequence encoding the conserved regions of AAV capsid protein was synthesized and cloned into the vector pET30a to obtain the plasmid pET30a-AAV-CR for prokaryotic expression and purification of the conserved peptides. Coomassie blue staining and Western blotting were used to identify the AAV conserved peptides. Japanese big ear white rabbits were immunized with AAV conserved region protein to prepare polyclonal antibody, with the rabbits injected with PBS as the control group. The antibody titer was determined with ELISA, and the performance of the antibody for recognizing capsid protein sequences of AAV1-AAV10 was assessed with Western blotting and immunofluorescence assay.@*RESULTS@#The plasmid pET30a-AAV-CR was successfully constructed, and a recombinant protein with a relative molecular mass of 17000 was obtained. The purified protein induced the production of antibodies against the conserved regions of AAV capsid in rabbits, and the titer of the purified antibodies reached 1:320 000. The antibodies were capable of recognizing a wide range of capsid protein sequences of AAV1-AAV10.@*CONCLUSION@#We successfully obtained the polyclonal antibodies against AAV capsid conserved region protein from rabbits, which facilitate future studies of AAV vector development and the biological functions of AAV.

Research progress on TRPV3 channel / 药学学报

Transient receptor potential vanilloid 3 (TRPV3) is a non-selective cation channel, located on cell membranes. TRPV3 is extensively expressed in various organs such as skin, brain, dorsal root ganglia, heart and colon. It's reported that TRPV3 involves in many physiological processes including sensation, skin barrier formation, hair growth and vasodilatation, and pathological processes like pruritus, cutaneous inflammatory disease and cancer. TRPV3 can respond to innoxious warm stimulation (≥ 33 ‍℃‍), endogenous substances (e.‍g., farnesylpyrophosphate) and exogenous small molecules (e.g., carvacrol, camphor and 2-APB). Recently, several natural or synthetic small molecules (e.g., osthole, 74a and dyclonine) have been shown to suppress TRPV3 activity, accompanying with therapeutic efficacy in animal models of diseases, which suggests the potential of TRPV3 as drug target. This paper reviews the research progress on the structure, physiological functions, related diseases and modulators of the TRPV3 channel to provide theoretical references for the future study on TRPV3 channel.

Research progress of small molecule proteasome activators / 药学学报

Proteasome controls the degradation of proteins closely related to life activities and plays a key role in the maintenance of protein homeostasis. Proteasome activities decrease with aging, followed by the overwhelming production of damaged proteins which far exceed the protein consumption. Accumulation of these proteins leads to various diseases including neurodegenerative diseases. Therefore, inducing toxic protein degradation is considered as a promising solution for the treatment of these diseases, while increasing the activity of proteasome is considered as an important strategy. However, the research in this field is still in the preliminary stage, and this review will focus on the discussion of the research progress of various small molecule proteasome activators, including research methods, pharmacological effects, structure-activity relationships and the existing problems.

A Single-Center Analysis of the Use of G-CSF Combined with Plerixafor to Mobilize Peripheral Blood Hematopoietic Stem Cell from Healthy Related Donors in Allogeneic Hematopoietic Stem Cell Transplantation / 中国实验血液学杂志

OBJECTIVE@#To study the effect and safety of G-CSF combined with Plerixafor on the mobilization of peripheral blood hematopoietic stem cells from healthy related donors of allogeneic hematopoietic stem cell transplantation (allo-HSCT).@*METHODS@#It was analyzed retrospectively that the data of peripheral blood hematopoietic stem cells from 33 (observation group) related donors mobilized by G-CSF plus Plerixafor in Hebei Yanda Lu Daopei Hospital from April 2019 to April 2021. Bone marrow and peripheral blood hematopoietic stem cells (PBSCs) of these donors were respectively collected on the fourth and fifth day of G-CSF-induced mobilization. Following the administration of Plerixafor on the night of the fifth day, PBSCs were collected on the sixth day once again. 46 donors using "G-CSF only" mobilization method in the same period were randomly selected as the control and respectively analyzed the differences of CD34+ cell counts on the fifth and the sixth day in two groups. And the donors' adverse reaction to Plerixafor in the form of questionnaire was also observed. Then it was compared that the patients who underwent allo-HSCT in "G-CSF+Plerixafor" group and "G-CSF only" group in terms of acute GVHD at grade I-IV or III-IV, CMV reactivation and EBV reactivation.@*RESULTS@#CD34+ cells count (M±Q) among PBSCs collected on the fifth and the sixth day in the observation group were (1.71±1.02)×106/kg and (4.23±2.33)×106/kg, respectively. CD34+ cell counts on the sixth day was significantly higher than that of the fifth day (P<0.001); While the counterparts in the control group were (2.47±1.60)×106/kg and (1.87±1.37)×106/kg, respectively. By statistical analysis, CD34+ cell counts on the sixth day was significantly less than that of the fifth day (P<0.001). The adverse reaction to Plerixafor for the donors in the study were all grade 1 or 2 (mild or moderate) according to CTCAE 5.0 and disappeared in a short time. The patients who underwent allo-HSCT in the "G-CSF+Plerixafor" group and "G-CSF only" group were not statistically significant in terms of acute GVHD at grade I-IV or III-IV, CMV reactivation and EBV reactivation (P>0.1).@*CONCLUSION@#The cell mobilization program of G-CSF combined with Plerixafor is safe and effective for being applied to allo-HSCT. The addition of Plerixafor can significantly increase the number of CD34 postive cells in the PBSC collection. Key words　　; ;