OBJECTIVE:To determine the equilibrium solubility and the apparent partition coefficient of sulfamethazine(SM2) in a series of phosphate buffer solutions of different pH so as to provide a basic study for the exploitation of SM2 preparation.METHODS:A series of buffer solutions of different pH were prepared.The apparent solubility was determined by saturation method;Ko/w was calculated with concentration ratio of SM2 in n-octanol and water phase after partition equilibrium.RESULTS:The maximum equilibrium solubility was 1.916 g?L-1 at pH 2 and 1.375 g?L-1 at pH 9,and the maximum of apparent partition coefficient was 3.9070 at pH 8.CONCLUSION:The equilibrium solubility and apparent partition coefficient of SM2 are correlated to pH of the medium.SM2 dissolved preferably when pH6.8,but SM2 was more distributed in the lipid phase and easier to be absorbed by body when pH=3～8.

Objective To investigate the protective effect of Ganyu capsule on the experimental hepatic injury in mice and rats.Methods Acute hepatic injury was induced by intraperitoneal injection of 0.1 %CCl4 10mL/kg and D-galactosamine 500 mg/kg in mice;Cirrhosis was induced by 40 %CCl4 adding with variousagents in rats.The biochemical parameters such as serum ALT were examined and the histopathological changes of hepatic tissue was measured.Results Ganyu capsule could obviously inhibit the increase of serum ALT and AST activity and reduce the content of collagen in liver and the deseverity of hepatic fibrosis.Conclusion Ganyu capsule has protective effects on the acute and chronic hepatic injury in mice and rats.

Objective: To investigate the prevalence of diabetes among individuals at high risk of diabetes in Baoshan District, Shanghai Municipality, so as to provide insights into community-based diabetes management. Methods: Permanent residents at ages of 35 years and older were sampled from Baoshan District using a multistage stratified cluster sampling method, and residents at a high risk of diabetes were screened using the Form for Risk Assessment of Diabetes among Community Residents in Shanghai Municipality. Participants' demographics, disease history and history of medication were collected using questionnaire surveys, and height, body weight, waist circumference, hip circumference, and blood pressure were measured. Diabetes was screened using fasting blood glucose and glucose tolerance test. The factors affecting the development of diabetes were identified among high-risk residents for diabetes using a multivariable logistic regression model. Results: A total of 3 107 residents at a high risk for diabetes were enrolled, including 1 165 men (37.50%) and 1 942 women (62.50%) with a mean age of (63.58±9.77) years. The prevalence of diabetes was 21.69% among the study subjects, and multivariable logistic regression analysis showed that men (OR=1.689, 95%CI: 1.357-2.104), age (40 years-, OR=4.833, 95%CI: 1.036-22.553; 50 years-, OR=2.627, 95%CI: 1.432-4.819; 60 years-, OR=1.551, 95%CI: 1.119-2.150; 70 years and older, OR=1.579, 95%CI: 1.232-2.025); high school/technical secondary school (OR=2.677, 95%CI: 1.636-4.380), overweight/obesity (OR=1.891, 95%CI: 1.447-2.472), hypertension (OR=1.306, 95%CI: 1.049-1.626), dyslipidemia (OR=1.428, 95%CI: 1.114-1.831), history of impaired glucose regulation (OR=15.161, 95%CI: 11.827-19.434) and family history of type 2 diabetes mellitus (OR=2.092, 95%CI: 1.619-2.704) caused an increased risk of diabetes among residents at a high risk diabetes. Conclusions The prevalence of diabetes was 21.69% among high-risk populations of diabetes in Baoshan District. Gender, age, educational level, overweight/obesity, hypertension, dyslipidemia, history of impaired glucose regulation and family history of type 2 diabetes mellitus are factors affecting the development of diabetes among high-risk populations.

Objective To observe the effect of Motomed Gracile on spastic cerebral palsy. Methods 48 cerebral palsy children were divided into two groups: intervention group (n=24) and control group (n=24). The children in the control group accepted comprehensive rehabilitation, while the children in the intervention group were trained with Motomed Gracile in addition. They were evaluated with Ashworth Assessment and manual muscle testing (MMT) 6 months after treatment. Results The scores of intervention group improved more significantly than those in control group （P<0.05）. Conclusion Motomed Gracile can facilitate the recovery of children with spastic cerebral palsy.

Objective UPLC-MS/MS bio-analysis method was developed for the simultaneous determination ofberberine,naringin,hesperidin,and neohesperidin in plasma of rats.Methods UPLC Acquity BEH C18 (50 rmm × 2.1 mm,1.7 μm) column was used,mobile phases were containing 0.05％ formic acid and 2 mmol/L ammonium formate in water (A)-containing 0.05％ formic acid in acetonitrile (B) as the mobile phase gradient elution;SD rats were randomly divided into oral administration berberine group,Citrus aurantium extract group,and berberine and C.aurantium extract compatibility group.Results UPLC-MS/MS method could be applied to determination of berberine,naringin,hesperidin,and neohesperidin,method validation meets the requirements of biological sample analysis.When rats were administered with berberine and C.aurantium extract compatibility,the plasma concentration of berberine was much more than single dose of berberine group and the bioavailability of berberine was increased.Meanwhile,naringin and neohesperidin can be detected in rat's plasma.Conclusion The bioavailability of flavonoids is significantly improved as well compared to the single dose of C.aurantium extract.This suggests that berberine and C.aurantium extract compatibility has significant drug-drug interaction.

Objective:To explore the type of cytokine (IL-2 or IL-7) and its most optimal concentration regarding the improvement of the signal-to-noise ratio of glutamic acid decarboxylase 65 (GAD65) in enzyme-linked immunospot (ELISPOT) assay in Type 1 diabetic (T1DM) patients.Methods:Twenty T1DM patients (Group A) and sixteen healthy controls matched with age and sex (Group B) were enrolled in our study,and their peripheral blood mononuclear cells (PBMCs) were isolated by Ficoll method.GAD65,internal control and Pediacel served as "five-for-one" vaccine were selected as the stimulating antigen.Different concentrations of IL-2 [0 U/mL (Group 1),0.5 U/mL (Group 2),2.5 U/mL (Group 3) and 12.5 U/mL (Group 4)] were added to the culture system.The CD4+ T cells of secreting interferon-gamma (IFN-γ) in the above groups were determined by ELISPOT.The spots number,net values and stimulating index (SI) were compared in GAD65 (signal) and internal control (background).Next,another 21 T1DM patients (Group C) and 12 healthy controls matched with age and sex (Group D) were enrolled,and the specific T cell response to the GAD65 antigen was detected.The net values and SI were compared between the best optimal concentration of IL-2 (2.5 U/mL,Group 5) and IL-7 (0.5 ng/mL,Group 6).Results:1) After adding IL-2 into the Group A,the amount of GAD65 reactive T cells in different groups increased compared with Group A1,while the background in the internal control also increased gradually with the increased concentration of IL-2.There was no significant difference in net value (signal-noise) in the different concentration between the Group A3 and the Group A4 (P＞0.05).The SI in the Group A3 (2.8),the highest one,was significantly higher than that in the Group B3 (1.3) (P＜0.05).2) Although the number of GAD65 spots in the Group C6 and the Group D6 were slightly higher than that in the Group C5 and the Group D5,respectively,the background in the Group C6 and the Group D6 also increased,without statistical significance (P＞0.05).The mean net value spot and SI in the Group C5 (net value:5.5;SI:2.8) were both significantly higher than those in the Group C6 (net value:4.3;SI:1.8) (bothP9＜0.05).Conclusion:The concentration of 2.5 U/mL for IL-2 is proved to be the best optimal concentration for GAD65 specific T-cell responses in ELISPOT in patients with T1DM.IL-2 is much better than IL-7 in improvement of the SI in the ELISPOT.

OBJECTIVE: To explore the better freezing protocol to preserve peripheral blood monuclear cells (PBMCs), islets antigen-specific T cells responses compared with freshly isolated samples in type 1 diabetic (T1D) patients. METHODS: The T cell Workshop Committee of the Immunology of Diabetes Society (IDS-TCW) organized the Freezing Study I and we were one of the 9 centers in the world to participate in the study. According to the two standardized T cell freezing protocols (warm and cold) to freshly isolated PBMCs in terms of recovery, viability, cell subset composition (FACS) and performance in Enzyme-linked immunospot (ELISPOT) assays, we chose 5 newly onset T1D patients and 5 age and sex matched healthy controls. Besides the protocols, all the freezing reagents and antigens were also centralized. The antigens used in ELISPOT were labeled blindedly. RESULTS: 1) Although warm frozen-thawed (W) samples had a slightly higher recovery rate (61.2% vs 60.1%, P>0.05) and viability (77.5% vs 74.9%, P>0.05) as compared with the cold frozen ones (C), the difference was not significant. 2) Both protocols led to a relative loss in monocytes as compared with the fresh samples (F) [3.2±1.1% (C) and 3.0±0.9% (W) vs 7.0±1.1% (F), both P<0.05], while other subsets including CD4+T, CD8+T, B cells, NK cells and NKT cells didn't. 3) Freezing and fresh samples showed similar IFN-γ secretion responses to polystimuli in ELISPOT. Irrespective of the freezing protocol, recall antigen Pediacel and islet antigen-reactive responses were both lower in the frozen cells compared with fresh PBMCs. The stimuli index (SI) of GADspecific T cell response in the fresh samples from T1D patients was 5.1, higher than that of frozen samples with either cold protocol (1.3) or warm one (1.4) (both P<0.05). Only fresh samples from T1D showed significantly higher GAD-specific T cell responses than the healthy controls no matter in SI (5.1 vs 0.9, P<0.05) or spot forming cells (8.1 vs 0.1, P<0.05), whereas the frozen samples did not show such difference. CONCLUSION More studies are needed to verify a freezing method to bring comparable islets antigen specific T cell responses in T1D patients to fresh PBMCs.
Adult ; CD4-Positive T-Lymphocytes ; immunology ; CD8-Positive T-Lymphocytes ; immunology ; Cryopreservation ; Diabetes Mellitus, Type 1 ; blood ; immunology ; Female ; Humans ; Islets of Langerhans ; immunology ; Leukocytes, Mononuclear ; cytology ; Male ; T-Cell Antigen Receptor Specificity ; immunology ; T-Lymphocytes ; cytology ; immunology ; Young Adult

Lactic acid is one of the main metabolites in the body, and its clearance rate reflects the dynamic changes of lactic acid in the body. Recent studies have shown that lactate clearance rate is related to the prognosis of critically ill patients with sepsis/septic shock, cardiogenic shock, out-of-hospital cardiac arrest, postoperative cardiovascular surgery, and liver and kidney dysfunction. This article reviews the relevant research progress of lactate metabolism and lactate clearance rate in different critically ill patients.

OBJECTIVE： To establish a method for the determination of related substances in rifabutin crude drug and capsules by HPLC. METHODS： HPLC method was adopted. The determination was performed on Agilent XDB-C8 column with mobile phase consisted of acetonitrile-0.1 mol/L potassium dihydrogen phosphate solution （pH 6.5±0.1） （50 ∶ 50， V/V） at the flow rate of 1.0 mL/min. The detection wavelength was set at 254 nm， the column temperature was 30 ℃， and sample size was 20 μL. The mobile phase was used as solvent to prepare the sample solution with a mass concentration of 1.0 mg/mL. The system suitability test was performed by using newly established method and current method （mass concentration of sample solution 0.5 mg/mL， C18 column） stated in quality standard of rifabutin crude drug and capsules. Related substance test was conducted for 6 batches of rifabutin crude drug and capsule （peak area normalization method）. RESULTS： The linear range of rifabutin was 0.8-16 μg/mL（r＝1.000 0）， RSDs of precision， reproducibility and stability tests （12 h） were all lower than 2.0％ （n＝6）； the limits of detection and quantification were 0.025 4， 0.085 2 μg/mL. In system suitability test， by using new method and current method， separation degree of rifabutin peak and pre-degradation product peak were 7.50 and 3.47. When 6 batches of samples were determined， the number of impurities detected by this method was 1-5 more than that by the current method， and the total amount of impurities was 0.19％-0.55％ higher. CONCLUSIONS： Established new method is well-separated and sensitive， and can be used for the determination of related substance in rifabutin crude drug and capsules， which helps the quality control of drugs.

ObjectiveTo explore the impact of COVID-19 epidemic on the lifestyles of patients with chronic diseases and to help better chronic disease prevention and control during the epidemic. MethodsThe patients with hypertension and type 2 diabetes who were still under management in Baoshan District， Shanghai at the end of September 2019 were selected for the investigation through telephone follow-up from March 1 to April 30 in 2020. 960 participants were selected using a stratified random sampling method. Those who did not complete the investigation for any reasons were excluded. A total of 613 people were effectively investigated. We compared and analyzed the lifestyles of patients with chronic diseases during 2020 （COVID-19） with those in 2019. ResultsDuring the epidemic， the proportion of people who had regular physical exercise （P<0.05）and transportation activities（P<0.05） was lower than that before the epidemic. The proportion of people with light， moderate and heavy activity intensity（P<0.05） was lower than before the epidemic， and the difference was statistically significant. The time spent on sitting or leaning was more than that before the epidemic （P<0.05）. As for the condition of complying with the doctor’s advice， no significant difference was found in different age and chronic disease groups. There was a statistically significant difference in total food intake （χ²=7.994，P<0.05） and staple foods （χ²=6.677，P<0.05） between patients with or without hypertension. There was a statistically significant difference in total food intake（χ²=10.694，P<0.05） and staple food intake （χ²=9.523，P<0.05） between those with or without diabetes mellitus（P<0.05）. Patients with chronic diseases during the epidemic could not know about latest values of measurement index and had emotional problems such as restlessness， nervousness and irritability. ConclusionPatients with chronic diseases changes their lifestyles during the epidemic， and their exercise and travel conditions decrease during the COVID-19 lockdown period. Most patients have different levels of emotional problems such as restlessness and nervousness. It is recommended to increase the intensity and frequency of physical activity and promote mental health to better prevent and control the occurrence of chronic diseases.