Yigong Powder regulates CXCL12/CXCR4 signaling to reduce glutamate release and prevent cognitive decline in mouse model of aging / 中国中药杂志

This study aims to explore the effect of preventive administration of Yigong Powder on the learning and memory abilities of the mouse model of aging induced by D-galactose and decipher the underlying mechanism, so as to provide a basis for the application of Yigong Powder in the prevention and treatment of cognitive decline. Forty KM mice were randomized into control, model, donepezil(1.5 mg·kg~(-1)), and high-dose(7.5 g·kg~(-1)) and low-dose(3.75 g·kg~(-1)) Yigong Powder groups. The mice in other groups except the control group were injected with D-galactose(200 g·kg~(-1)) at the back of the neck for the modeling of aging. At the same time, the mice were administrated with corresponding drugs by gavage for one month. Morris water maze was used to examine the learning and memory abilities of the mice. Hematoxylin-eosin staining was employed to observe the pathological and morphological changes of the hippocampus. The immunofluorescence assay was employed to detect the expression of ionized calcium-binding adapter molecule 1(IBA1), glial fibrillary acidic protein(GFAP), chemokine C-X-C-motif ligand 12(CXCL12), chemokine C-X-C-motif receptor 4(CXCR4) in the hippocampus and observe the positional relationship between IBA1, GFAP, and CXCR4. Western blot was employed to determine the protein levels of extracellular regulated kinase(ERK), p-ERK, and tumor necrosis factor receptor 1(TNFR1). Enzyme-linked immunosorbent assay was employed to measure the levels of glutamate and tumor necrosis factor(TNF-α) in the brain tissue and the level of TNF-α in the serum and spleen. Yigong Powder significantly shortened the escape latency, increased the times crossing platforms, and prolonged the cumulative time in quadrants of the aging mice. It alleviated the nerve cell disarrangement, increased intercellular space, and cell degeneration or death in the hippocampus and reduced the pathology score of the damaged nerve. Moreover, Yigong Powder reduced the positive area of IBA1 and GFAP, reduced the levels of TNF-α in the brain tissue, serum, and spleen, and decreased spleen index. Furthermore, Yigong Powder decreased the average fluorescence intensity of CXCL12 and CXCR4, reduced CXCR4-positive astrocytes and microglia, down-regulated the protein levels of p-ERK/ERK and TNFR1, and lowered the level of glutamate in the brain tissue. This study showed that the preventive administration of Yigong Powder can ameliorate the learning and memory decline of the D-galactose-induced aging mice by regulating the immune function of the spleen and the CXCL12/CXCR4 signaling in the brain to reduce glutamate release. However, the mechanism of Yigong San in preventing and treating dementia via regulating spleen and stomach function remains to be studied.

Incidence of extrauterine growth retardation and its risk factors in very preterm infants during hospitalization: a multicenter prospective study / 中国当代儿科杂志

OBJECTIVES@#To investigate the incidence of extrauterine growth retardation (EUGR) and its risk factors in very preterm infants (VPIs) during hospitalization in China.@*METHODS@#A prospective multicenter study was performed on the medical data of 2 514 VPIs who were hospitalized in the department of neonatology in 28 hospitals from 7 areas of China between September 2019 and December 2020. According to the presence or absence of EUGR based on the evaluation of body weight at the corrected gestational age of 36 weeks or at discharge, the VPIs were classified to two groups: EUGR group (n=1 189) and non-EUGR (n=1 325). The clinical features were compared between the two groups, and the incidence of EUGR and risk factors for EUGR were examined.@*RESULTS@#The incidence of EUGR was 47.30% (1 189/2 514) evaluated by weight. The multivariate logistic regression analysis showed that higher weight growth velocity after regaining birth weight and higher cumulative calorie intake during the first week of hospitalization were protective factors against EUGR (P<0.05), while small-for-gestational-age birth, prolonged time to the initiation of total enteral feeding, prolonged cumulative fasting time, lower breast milk intake before starting human milk fortifiers, prolonged time to the initiation of full fortified feeding, and moderate-to-severe bronchopulmonary dysplasia were risk factors for EUGR (P<0.05).@*CONCLUSIONS@#It is crucial to reduce the incidence of EUGR by achieving total enteral feeding as early as possible, strengthening breastfeeding, increasing calorie intake in the first week after birth, improving the velocity of weight gain, and preventing moderate-severe bronchopulmonary dysplasia in VPIs.

Multicenter post-marketing clinical evaluation on the clinical performance of the five domestic fast nucleic acid detection reagents for 2019-nCoV / 中华检验医学杂志

Objective:This multicenter clinical evaluation analyzed the clinical performance of five fast nucleic acid detection systems for 2019-nCoV.Methods:Clinical performance of the five fast nucleic acid detection reagents approved in China was evaluated in the present study. Fifty-seven throat swabs samples from COVID-19 patients and fifteen throat swabs samples from healthy people were collected from the First Affiliated Hospital of Zhejiang University school of Medicine, Tongji Hospital of Tongji Medical College of HUST, and National Institute of Viral Disease Control and Prevention of CDC to evaluate the positive coincidence rate, negative coincidence rate, total coincidence rate, the detection time and retest rate as well as the relation between positive intensity and positive coincidence rate of the five fast nucleic acid detection systems in November 2020.Results:The positive coincidence rates of the five kits were 92.59% (50/54), 83.64% (46/55), 98.25% (56/57), 94.44% (51/54) and 98.18% (54/55); and the negative coincidence rates were 93.33% (14/15), 93.33% (14/15), 86.67% (13/15), 100% (14/14) and 93.33% (14/15); and the total coincidence rates were 92.75% (64/69), 85.71% (60/70), 95.83% (69/72), 94.20% (65/69) and 97.14% (68/70), respectively. The positive coincidence rate of the five kits reached 100% for the strong-positive (90/90) and medium-positive samples (84/84), but only 82.18% (83/101) for weak-positive samples (cycle threshold value>33), and the retest rate of two kits were 15.28% (11/72) and 12.50% (9/72), which were both higher than 10%. Total time from sample extraction to amplification was between 32.33-65.33 minutes for these five kits.Conclusion:The five fast nucleic acid detection reagents have good performance and can be used as a supplement to routine nucleic acid detection reagents.

Prevention and control of HIV/AIDS in China: lessons from the past three decades / 中华医学杂志(英文版)

In the past 37 years, human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) has undergone various major transmission routes in China, with the world most complex co-circulating HIV-1 subtypes, even the prevalence is still low. In response to the first epidemic outbreak of HIV in injecting drug users and the second one by illegal commercial blood collection, China issued the Anti-Drug Law and launched the Blood Donation Act and nationwide nucleic acid testing, which has avoided 98,232 to 211,200 estimated infections and almost ended the blood product-related infection. China has been providing free antiretroviral therapy (ART) since 2003, which covered >80% of the identified patients and achieved a viral suppression rate of 91%. To bend the curve of increasing the disease burden of HIV and finally end the epidemic, China should consider constraining HIV spread through sexual transmission, narrowing the gaps in identifying HIV cases, and the long-term effectiveness and safety of ART in the future.

Effect of drying processing methods on different specifications of Sophorae Flos based on comprehensive statistical analysis / 中国中药杂志

To investigate the effects of six common drying methods on the quality of different specifications of Sophorae Flos, in order to select their suitable drying methods. According to appearance and morphology, Sophorae Flos was divided into the following three specifications: flower bud type(HL), half-open type(BK) and blooming type(SK). All specifications of samples were treated with shade-drying method(25 ℃, natural temperature), sun-drying method, hot-air-drying method(60, 105 ℃), and drying method(60 ℃) after steaming. The contents of total flavonoids, rutin, narcissus, quercetin, isorhamnetin, and Fe~(3+) reducing ability, DPPH free radical scavenging ability, ABTS free radical scavenging ability and fluorescence recovery after photobleaching(FRAP) were detected by UV, HPLC and colorimetry, respectively. Principal component analysis(PCA), cluster analysis(CA) and correlation analysis were used to comprehensively evaluate the quality of samples. According to the results, there were significant differences in the effect of drying methods on different specifications of samples. The drying method(60 ℃) after steaming was suitable for HL and BK, while the hot-air-drying method(60 ℃) was suitable for SK. When the fresh medicinal materials could not be treated in time, they should be spread out in a cool and ventilated place. Under high and low temperature conditions, the quality of three specifications of Sophorae Flos would be reduced. The hot-air-drying method(105 ℃) and shade-drying method(25 ℃) were not suitable for the treatment of fresh flowers and flower buds of Sophora japonicus. There were obviously differences of chemical compositions and antioxidant activities among the three specifications of samples. Therefore, the specifications of medicinal materials should be controlled to ensure the uniform quality. The study provided the abundant data reference for the selection of appropriate drying methods for the three specifications of Sophorae Flos, and useful exploration for the classification and processing of medicinal materials of flowers.

Selection of enteral nutrition regimens for children with abdominal Henoch-Schönlein purpura / 中国当代儿科杂志

OBJECTIVE@#To explore the reasonable and effective enteral nutrition regimen for children with abdominal Henoch-Schönlein purpura (HSP).@*METHODS@#A retrospective analysis was performed on the medical data of children with abdominal HSP who were hospitalized from August 2013 to August 2018. According to the starting time of enteral nutrition after abdominal pain relief, the children were divided into three groups: < 24 hours (@*RESULTS@#The retrospective analysis showed that the children who were given extensively hydrolyzed lactoprotein formula for enteral nutrition at 24-48 hours after abdominal pain relief had a lower recurrence rate of clinical symptoms and the highest degree of satisfaction among their family members (@*CONCLUSIONS@#It is reasonable and effective to start the feeding with extensively hydrolyzed lactoprotein formula at 24-48 hours after abdominal pain relief in children with abdominal HSP.

Construction of laboratory medicine suitable for large-scale public health events / 中华检验医学杂志

The medical laboratories have played the important role in fighting against the pandemic of COVID-19. It′s critical to improve response strategy and better prepare to create robust and sustainable medical laboratories for future outbreaks of public health events. The general framework to guide the construction of the qualified medical laboratories is discussed.

Optimization of water extracting and refining procession of Sijunzi Decoction Granules by orthogonal design and pharmacodynamics test / 中草药

Objective: To optimize the water extracting and refining procession of Sijunzi Decoction Granules (SDG). Methods: The orthogonal test method was used to study the four factors including the soak time, amount of water added, extraction time and frequency by taking the dry extract yield of the medicinal materials and contents of ginsenoside Rg1, Re, Rb1, glycyrrhizic acid, and liquiritin as indicators to optimize the water extracting process of SDG. To optimize the alcohol precipitation process of SDG, the factors including the concentration of the medicinal materials, alcohol content, and time of alcohol precipitation were investigated. The extracts before and after alcohol precipitation were compared by intervening spleen deficiency syndrome pharmacodynamics experiment. Results: The best water extracting procession of SDG was soaked for 60 min with 10 times of water, decocted three times, 30 min for each time. The optimal water extraction by alcohol sedimentation process was to concentrate the filtrate of water extraction to 1 mL, which was equivalent to 0.5 g of the original medicinal materials, with 80% alcohol content and 12 h alcohol precipitation time. Compared with the model group, the activity of salivary amylase and the conent of serum gastrin in the water extracting group and water extracting by alcohol sedimentation group of SDG were significantly increased and could improve the absorption function of xylose in small intestine of rats with spleen deficiency syndrome (P 0.05). Conclusion: The alcohol precipitation process is not suitable for refining of SDG. So the water extracting process is finally selected as the best extraction process of SDG.

Disparity of human immunodeficiency virus incidence and drug resistance in college student, non-student youth and older men who have sex with men: a cross-sectional study from seven major cities of China / 中华医学杂志(英文版)

BACKGROUND@#Human immunodeficiency virus (HIV) prevalence among student men who have sex with men (MSM) in college is more than 5.0% and keeps on increasing in China. This study aims to clarify the proportion of HIV recent infection, its propeller and the source among college student MSM.@*METHODS@#We conducted a multicenter cross-sectional study in seven major Chinese cities during 2012-2013. HIV recent infections (≤ 168 days) and incidence was measured and estimated by BED HIV-1 capture enzyme immunoassay (BED-CEIA) testing strategy. HIV-related behaviors and transmitted drug resistance (TDR) were investigated and compared between the college student MSM, <25-year-old non-student youth MSM (NSYM), and ≥25-year-old non-student non-youth MSM (NSNYM), using structured survey, and analyses of drug resistance.@*RESULTS@#Overall, 4,496 (4496/4526, 99.3%) were eligible for enrollment, comprising 565 college student MSM, 1,094 NSYM, and 2,837 NSNYM. The proportion of HIV recent infection were 70.3% (26/37), 50.8% (65/128) and 35.1% (95/271), the HIV incidence rate were 10.0 (95% CI: 6.2-13.9)/100PY, 12.9 (95% CI: 9.8-16.1)/100PY, 6.8 (95% CI: 5.4-8.2)/100PY, and TDR prevalence were 7.4% (2/27), 2.0%, (2/98) and 4.9% (11/226), among student MSM, NSYM, and NSNYM, respectively. Among HIV positive student MSM with age< 21-year-old, the proportion of HIV recent infection is 90.9% (10/11). Factors independently associated with HIV recent infection in student MSM was usage of recreational drug in the past 6 months (AOR: 2.5; 95% CI: 1.0-5.8).@*CONCLUSIONS@#College student MSM had higher proportion of HIV recent infection and TDR than the youth and older MSM in China during 2012-2013. The HIV infections were more likely to happen during the early year of college life among student MSM.

Clinical effect of alanyl-glutamine-enriched nutritional support in the treatment of children with abdominal Henoch-Schönlein purpura / 中国当代儿科杂志

OBJECTIVE@#To study the clinical effect of alanyl-glutamine-enriched nutritional support in the treatment of children with abdominal Henoch-Schönlein purpura.@*METHODS@#Children with abdominal Henoch-Schönlein purpura who needed nutritional support were enrolled and stratified according to age, sex and the severity of disease, and were randomly divided into a control group (n=118) and an enriched nutritional support group (n=107). The control group was given nutritional support without using alanyl-glutamine, while the enriched nutritional support group was given alanyl-glutamine-enriched nutritional support. Intravenous steroids were used according to the severity of disease in both groups. Other therapies were the same in the two groups. The two groups were compared in terms of the length of hospital stay, the rate and duration of use of intravenous steroids, the recurrence rate of symptoms during hospitalization, the rate of total parenteral nutrition (TPN), the rate of weight loss and the rate of fasting for more than 5 days. All patients were followed up for 3 months after discharge to monitor the recurrence of symptoms.@*RESULTS@#There were no significant differences in the length of hospital stay, the rate of TPN and the rate of fasting for more than 5 days between the two groups (P>0.05). Compared with the enriched nutritional support group, the control group showed significant increases in the rate and duration of use of intravenous steroids, the recurrence rate of symptoms and the rate of weight loss (P<0.05). After the 3-month follow-up, all the children resumed normal diet, and the recurrence rate of digestive symptoms was less than 20% in each group. Abdominal pain was the most common symptom (83.33%, 30/36), followed by vomiting and abdominal distention. No digestive hemorrhage was observed. All the symptoms were relieved after symptomatic treatment. No significant difference was found between the two groups in the recurrence rate of digestive symptoms (P=0.693).@*CONCLUSIONS@#Alanyl-glutamine-enriched nutritional support in the treatment of children with abdominal Henoch-Schönlein purpura can reduce the use of intravenous steroids and weight loss, but without impact on the length of hospital stay and post-discharge recurrence.

Relation of Blood Arsenic Concentration with Effect and Safety of Arsenic-Containing Qinghuang Powder () in Patients with Myelodysplastic Syndrome / 中国结合医学杂志

OBJECTIVE@#To investigate the relation of blood arsenic concentration (BAC) with clinical effect and safety of arsenic-containing Qinghuang Powder (, QHP) in patients with myelodysplastic syndrome (MDS).@*METHODS@#Totally 163 patients with MDS were orally treated with QHP for 2 courses of treatment, 3 months as 1 course. The BACs of patients were detected by atomic fluorescence spectrophotometry at 1, 3, and 6 months during the treatment, and the effective rate, hematological improvement and safety in patients after treatment with QHP were analyzed.@*RESULTS@#After 2 courses of treatment, the total effective rate was 89.6% (146/163), with 31.3% (51/163) of hematological improvement and 58.3% (95/163) of stable disease. The hemoglobin increased from 73.48 ± 19.30 g/L to 80.39 ± 26.56 g/L (P0.05). Among 46 patients previously depended on blood transfusion, 28.3% (13/46) completely got rid of blood transfusion and 21.7% (10/46) reduced the volume of blood transfusion by more than 50% after treatment. The BACs were significantly increased in patients treated for 1 month with 32.17 ± 18.04 μ g/L (P0.05). The adverse reactions of digestive tract during the treatment were mild abdominal pain and diarrhea in 14 cases (8.6%), and no patients discontinued the treatment. The BACs of patients with gastrointestinal adverse reactions were significantly lower than those without gastrointestinal adverse reactions (22.39 ± 10.38 vs. 37.89 ± 11.84, μ g/L, P<0.05). The BACs of patients with clinical effect were significantly higher than those failed to treatment (40.41 ± 11.69 vs. 23.84 ± 12.03, μ g/L, P<0.05).@*CONCLUSION@#QHP was effective and safe in the treatment of patients with MDS and the effect was associated with BACs of patients.

Effects of Jiawei Foshou San capsule on rat hepatic cytochrome P450 enzymes invitro and invivo / 药学学报

This study aimed to evaluate the effects of Jiawei Foshou San capsule (JWFSSC) on CYP1A2, CYP2C6, CYP2D2, CYP2E1 and CYP3A1/2 enzyme activities in rat liver microsomes in vitro and in vivo, and to provide pharmacokinetic data for its combined use with other medicines. After incubating liver microsomes with a cocktail of probe drugs, the metabolites were quantitated with LC-MS/MS to assess the CYP enzyme activity. The hepatic pathological changes were evaluated by histology after hematoxylin and eosin (HE) staining. With the dose range up to 3 200 mg·L-1, the IC50 of JWFSSC for CYP2D2, CYP2E1 and CYP3A1/2 in vitro was 229.3 mg·L-1, 361.9 mg·L-1 and 274.6 mg·L-1 respectively. Compared with the vehicle control group, the enzyme activities of CYP1A2, CYP2C6 and CYP3A1/2 showed a significant increase in animals given JWFSSC 180 mg·kg-1·d-1 (P<0.01). Based on histology, several pathological changes were observed in JWFSSC groups: there was less inflammatory infiltration compared to the tetrahydropalmatine (THP) group. These results of inhibition in vitro and induction in vivo suggest a strengthened efficacy and a prolonged effective time of drugs metabolized by CYP2D2 and CYP2E1 enzymes when combined with JWFSSC in use. The dosage of parent drugs should be appropriately reduced when used in combination with JWFSSC. However, if a drug is metabolized by CYP1A2 and CYP2C6 when used in combination with JWFSSC, the effect of the drug is likely reduced and the dosage should be increased appropriately. In addition, the combination of ferulic acid (FA), ligustrazine (LZ) and THP can significantly reduce the toxicity of THP in rat livers. In this study, the program of animal testing had been approved by Committee on the management and usage of experimental animal in the College of Pharmaceutical Sciences, Southwest University.

The clinical outcomes and prognosis of older human immunodeficiency virus-infected patients under antiretroviral therapy / 中华传染病杂志

Objective To evaluate the clinical outcomes and prognosis of older human immunodeficiency virus (HIV )-infected patients under antiretroviral therapy (ART ) in China .Methods This study was carried out in a retrospective cohort of HIV-infected patients initiated ART between January 2004 and December 2012 at The First Affiliated Hospital ,China Medical University .The patients were enrolled and divided into two groups ,including <50 years group (young and middle-aged group) and≥50 years group (older group) .Immunological and virological responses and mortality were analyzed . Data were analyzed by t test ,chi-square test ,two-way analysis of variance and log-rank test .Results Totally 291 subjects were included ,among whom 97 subjects were older patients and 194 subjects were young and middle-aged patients .Male was predominate in both groups ,which accounted for 91 .8％ and 87 .6％ ,respectively .The CD4+ T lymphocyte count in the older group before treatment was (151 .9 ±96 .2) cells /μL ,which was significantly lower than that in the young and middle-aged group (183 .4 ± 93 . 5) cells/μL (t= 2 .657 , P=0 .009) .At month 12 of treatment ,the CD4+ T lymphocyte count in the older group was significantly lower than that in the young and middle-aged groups (t= 2 .120 , P=0 .035) ,while there was no statistically significant difference between the two groups at month 24 (t=1 .025 ,P=0 .299) .The percentage of CD4+ T lymphocyte count increasing to 500 cells/μL in the older and youth groups during follow-up were 11 .3％ and 16 .0％ ,respectively (χ2=1 .127 ,P =0 .376) .Log-rank analysis showed that the mean times of virus inhibition in older group and young and middle-aged group were 7 .9 (95％ CI:6 .8-8 .5) and 7 .6 (95％ CI:6 .5 -9 .3) ,respectively ,with no statistically significant difference (χ2 =0 .002 , P=0 .961) .Virological failure was reported in 4 patients (4 .1％ ) in older group and 11 patients (5 .7％ ) in young and middle-aged group . Chi-square test showed no statistically significant difference between the two groups (χ2 = 0 .15 , P= 0 .78) .During follow-up , 19 .6％ (19/97) in older group and 3 .6％ (7/194) in young and middle-aged group died .The former was significantly higher than the latter (χ2 = 21 .113 , P< 0 .01 ) .Conclusions Older patients show a poor immunologic response ,similar viral suppression and higher risk of mortality compared with young and middle-aged patients . Future research should be aimed at the feasible and specific strategy for early diagnosis and timely treatment for older patients to improve treatment efficacy and reduce mortality .

Sputasol (Dithiothreitol 0.54%) Improves the Detection of Human Papillomaviruses Using the Cobas 4800 System

No abstract available.

The procedure and challenges for pediatric reference interval establishment in clinical laboratory / 中华检验医学杂志

The pediatric reference intervals in clinical laboratory play an important role in diagnosis of illness,therapeutic monitoring,prediction of prognosis and health evaluation.Compared with establishing reference interval for adults,there are more challenges to establish pediatric reference intervals.Therefore,the procedure and key technologies of direct method and indirect method are stated based on the characteristics of children population and pediatric,by which to define,transfer and validate pediatric reference intervals.This study will provide systematically methodological ideas for clinical laboratories to establish pediatric reference intervals.

Factors related to antiretroviral therapy among HIV/AIDS positive students aged 15-30, in a hospital of Shenyang city / 中华流行病学杂志

Objective To investigate the risk factors on antiretroviral therapy (ART) among HIV/AIDS positive students in Shenyang.Methods A cross-sectional study was conducted among HIV/AIDS positive students aged between 15 and 30,in an HIV-treatment-designated hospital in Shenyang city,during 2007-2015.Data were analyzed by multivariate logistic regression mode to identify the risk factors related to ART.Results A total of 2 379 HIV/AIDS patients attended the hospital and 6.1％ (146/2 379) of them were students,during 2007-2015.All of the HIV/AIDS positive students were males,with homosexual transmission accounted for 93.2％ (136/146).The overall rate on delayed diagnosis was 52.7％ (77/146),when at diagnosis of CD4 + T lymphocyte counts ≤350 cells/μl.The proportion of ART was 67.1％ (98/146).Factors as:year that the HIV diagnosis was made (aOR=1.21,95％CI:1.02-1.44),age between 24-30 (compared with age below 18-year-old,aOR=8.15,95％CI:1.46-45.52),and delayed diagnosis (aOR=2.22,95％CI:1.05-4.71),appeared independently related to ART among HIV/AIDS positive students.Conclusions Factors as the year that HIV diagnosis was made,age and delayed diagnosis of the patients seemed to be at higher risk for ART among HIV/AIDS positive students.

Factors related to antiretroviral therapy among HIV/AIDS positive students aged 15-30, in a hospital of Shenyang city / 中华流行病学杂志

Objective To investigate the risk factors on antiretroviral therapy (ART) among HIV/AIDS positive students in Shenyang.Methods A cross-sectional study was conducted among HIV/AIDS positive students aged between 15 and 30,in an HIV-treatment-designated hospital in Shenyang city,during 2007-2015.Data were analyzed by multivariate logistic regression mode to identify the risk factors related to ART.Results A total of 2 379 HIV/AIDS patients attended the hospital and 6.1％ (146/2 379) of them were students,during 2007-2015.All of the HIV/AIDS positive students were males,with homosexual transmission accounted for 93.2％ (136/146).The overall rate on delayed diagnosis was 52.7％ (77/146),when at diagnosis of CD4 + T lymphocyte counts ≤350 cells/μl.The proportion of ART was 67.1％ (98/146).Factors as:year that the HIV diagnosis was made (aOR=1.21,95％CI:1.02-1.44),age between 24-30 (compared with age below 18-year-old,aOR=8.15,95％CI:1.46-45.52),and delayed diagnosis (aOR=2.22,95％CI:1.05-4.71),appeared independently related to ART among HIV/AIDS positive students.Conclusions Factors as the year that HIV diagnosis was made,age and delayed diagnosis of the patients seemed to be at higher risk for ART among HIV/AIDS positive students.

Epidemiological and clinical features of calicivirus-associated diarrhea in hospitalized children in Chengdu, China from 2012 to 2014 / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To investigate the epidemiological and clinical features of calicivirus-associated diarrhea in hospitalized children in Chengdu, China in recent years.</p><p><b>METHODS</b>The clinical data of 267 children with calicivirus-associated diarrhea aged <5 years who were hospitalized in Chengdu Women and Children's Central Hospital (the only sentinel hospital for sample collection of pediatric viral diarrhea in Chengdu, Sichuan) between January 2012 and December 2014 were retrospectively studied.</p><p><b>RESULTS</b>Among the 267 children, 200 (74.9%) were aged less than 1 year. The infection rate of calicivirus was 28.4%, 21.6%, and 27.1% in 2012, 2013, and 2014, respectively. Calicivirus was prevalent in summer and autumn (August to October). The detection rate of Norovirus II was 85.8% (229/267), and 244 children (91.4%) experienced an acute clinical course. Watery stool was the most common change in stool properties (82.0%, 219 children), and some specimens showed mucus and/or blood. Most children had moderate to severe fever. One hundred and thirty-eight children (53.9%) experienced a reduced serum prealbumin level. One hundred and fifty-nine children (59.6%) experienced flora imbalance.</p><p><b>CONCLUSIONS</b>Calicivirus has become one of the major pathogens for diarrhea in children aged <5 years in Chengdu, with Norovirus II as the dominant strain. Calicivirus is prevalent in summer and autumn. Infants aged <1 year are the main population affected by calicivirus-associated diarrhea, with watery stool as the most common manifestation.</p>

Failure to Identify Somatic Mutations in Monozygotic Twins Discordant for Schizophrenia by Whole Exome Sequencing / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Schizophrenia (SCZ) is a severe, debilitating, and complex psychiatric disorder with multiple causative factors. An increasing number of studies have determined that rare variations play an important role in its etiology. A somatic mutation is a rare form of genetic variation that occurs at an early stage of embryonic development and is thought to contribute substantially to the development of SCZ. The aim of the study was to explore the novel pathogenic somatic single nucleotide variations (SNVs) and somatic insertions and deletions (indels) of SCZ.</p><p><b>METHODS</b>One Chinese family with a monozygotic (MZ) twin pair discordant for SCZ was included. Whole exome sequencing was performed in the co-twin and their parents. Rigorous filtering processes were conducted to prioritize pathogenic somatic variations, and all identified SNVs and indels were further confirmed by Sanger sequencing.</p><p><b>RESULTS</b>One somatic SNV and two somatic indels were identified after rigorous selection processes. However, none was validated by Sanger sequencing.</p><p><b>CONCLUSIONS</b>This study is not alone in the failure to identify pathogenic somatic variations in MZ twins, suggesting that exonic somatic variations are extremely rare. Further efforts are warranted to explore the potential genetic mechanism of SCZ.</p>

Influence of coping material selection and porcelain firing on marginal and internal fit of computer-aided design/computer- aided manufacturing of zirconia and titanium ceramic implant-supported crowns / 华西口腔医学杂志

<p><b>OBJECTIVE</b>This study aimed to investigate the influence of coping material and porcelain firing on the marginal and internal fit of computer-aided design/computer-aided manufacturing (CAD/CAM) of zirconia ceramic implant- and titanium ceramic implant-supported crowns.</p><p><b>METHODS</b>Zirconia ceramic implant (group A, n = 8) and titanium metal ceramic implant-supported crowns (group B, n = 8) were produced from copings using the CAD/CAM system. The marginal and internal gaps of the copings and crowns were measured by using a light-body silicone replica technique combined with micro-computed tomography scanning to obtain a three-dimensional image. Marginal gap (MG), horizontal marginal discrepancy (HMD), and axial wall (AW) were measured. Statistical analyses were performed using SPSS 17.0.</p><p><b>RESULTS</b>Prior to porcelain firing, the measurements for MG, HMD, and AW of copings in group A were significantly larger than those in group B (P < 0.05). After porcelain firing, the measurements for MG of crowns in group A were smaller than those in group B (P < 0.05), whereas HMD and AW showed no significant difference between the two groups (P > 0.05). Porcelain firing significantly reduced MG (P < 0.05) in group A but significantly increased MG, HMD, and AW in group B (P < 0.05) HMD and AW were not influenced by porcelain firing in group A (P > 0.05).</p><p><b>CONCLUSION</b>The marginal fits of CAD/CAM zirconia ceramic implant-supported crowns were superior to those of CAD/CAM titanium ceramic-supported crowns. The fits of both the CAD/CAM zirconia ceramic implant- and titanium ceramic implant-supported crowns were obviously influenced by porcelain firing.</p>