Objective:To investigate the association of urinary cadmium levels with peripheral leukocyte classification counts among middle-aged and older adults aged 40 to 89 years in selected areas of China.Methods:The research was based on the survey of the impact of soil quality of agricultural land on human health in typical areas conducted in 2019-2020. A total of 5 600 middle-aged and older adults aged 40 to 89 years were included by using a multi-stage stratified random sampling method. Baseline characteristics of the subjects were collected and physical examinations were performed. Random midstream urine was collected to measure urinary cadmium and urinary creatinine and fasting venous blood was collected to measure the leukocyte count, neutrophil count, lymphocyte count, monocyte count and eosinophil count. The linear mixed effect model was used to analyse the association of urinary cadmium levels with leukocyte classification counts, and the dose-response relationship between them was analyzed by using the restricted cubic spline (RCS) function.Results:The age of the subjects was (63.17±12.02) years; 2 851 (50.91%) were males; and the M ( Q 1, Q 3) of urinary creatinine-corrected urinary cadmium levels was 2.69 (1.52, 4.69) μg/g·creatinine. After adjusting for confounding factors, the results of linear mixed effects model analysis showed that for each 1-unit increase in urinary creatinine-corrected urinary cadmium level, the percentage change [% (95% CI)] of leukocyte count and lymphocyte count was -1.70% (-2.61%, -0.79%) and -1.57% (-2.86%, -0.26%), respectively. RCS function showed a negative linear relationship between urinary creatinine-corrected urinary cadmium levels and leukocyte counts and lymphocyte counts, respectively (all Pnon-linear>0.05). Conclusion:Urinary cadmium levels are negatively associated with leukocyte count and lymphocyte count among middle-aged and older adults aged 40 to 89 years in selected areas of China.

Objective:To investigate the association of urinary cadmium levels with peripheral leukocyte classification counts among middle-aged and older adults aged 40 to 89 years in selected areas of China.Methods:The research was based on the survey of the impact of soil quality of agricultural land on human health in typical areas conducted in 2019-2020. A total of 5 600 middle-aged and older adults aged 40 to 89 years were included by using a multi-stage stratified random sampling method. Baseline characteristics of the subjects were collected and physical examinations were performed. Random midstream urine was collected to measure urinary cadmium and urinary creatinine and fasting venous blood was collected to measure the leukocyte count, neutrophil count, lymphocyte count, monocyte count and eosinophil count. The linear mixed effect model was used to analyse the association of urinary cadmium levels with leukocyte classification counts, and the dose-response relationship between them was analyzed by using the restricted cubic spline (RCS) function.Results:The age of the subjects was (63.17±12.02) years; 2 851 (50.91%) were males; and the M ( Q 1, Q 3) of urinary creatinine-corrected urinary cadmium levels was 2.69 (1.52, 4.69) μg/g·creatinine. After adjusting for confounding factors, the results of linear mixed effects model analysis showed that for each 1-unit increase in urinary creatinine-corrected urinary cadmium level, the percentage change [% (95% CI)] of leukocyte count and lymphocyte count was -1.70% (-2.61%, -0.79%) and -1.57% (-2.86%, -0.26%), respectively. RCS function showed a negative linear relationship between urinary creatinine-corrected urinary cadmium levels and leukocyte counts and lymphocyte counts, respectively (all Pnon-linear>0.05). Conclusion:Urinary cadmium levels are negatively associated with leukocyte count and lymphocyte count among middle-aged and older adults aged 40 to 89 years in selected areas of China.

Purpose To investigate the cell components in different tumor lineages of multiple synchronous pituitary neuro-endocrine tumors(PitNETs)/neuroendocrine tumors(MSPs)and to carry out accurate histological typing,which provides an important basis for determining the follow-up plan and adjuvant therapy after surgery.Methods The clinical data of 855 pa-tients with PitNETs were collected and reclassified according to the new WHO standard.The clinicopathological features of 13 patients diagnosed as MSPs were analyzed retrospectively.The immunohistochemical EnVision two-step method was used to de-tect the expression of PIT-1,SF-1,T-PIT,GH,PRL,TSH,LH,FSH,ACTH,etc.,and related literatures were reviewed.Methods A total of 855 cases of pituitary neuroendocrine tumor from the second hospital of the Chinese Hebei Medical U-niversity were collected and reclassified according to the new WHO standard,and review the literature.Results(1)The age of patients were 39-68 years with median age of 55 years.7 cases were female and 6 were male;(2)Imaging findings:There was 1.2～3.8 cm(mean 2.5 cm)in maximum tumor di-ameter.13 patients were large adenomas,neither MSPs nor sin-gle lineage PitNETs could not assessed on imaging;(3)Clinical manifestations:3 cases had hyperprolactinemia which all contai-ning PitNETs components of PRL,one case was immature PIT-1 polyhormone cell tumor,one was dense granular prolactinoma,and one case was eosinophilic stem tumor.One patient had Cushing's disease and contained a Crook cell tumor component;two had elevated ACTH,and one had an adrenocorticotropic ad-enomatous component.In the two patients with no evidence of hormone excess,all contained gonadotropin cell tumor compo-nents;(4)Combination form:11 cases of the combination of the two cell lineages(5 cases of combination of SF-1 lineage and PIT-1 lineage;4 cases of combination of T-PIT lineage and PIT-1 lineage;1 case of null cell tumor and PIT-1 lineage;1 case of plurihormonal PitNETs and SF-1 lineage);Two cases of three cell combinations(null cell tumor,PIT-1 lineage,and T-PIT lineage);Among them,13 cases were PIT-1 lineage tumors,46.2％(6/13)were gonadotropin cell tumor,38.5％(5/13)were prolactinoma;(5)The presence of high-risk lineage tumors in the 10 patient combinations:3 immature PIT-1-lineage tumor,1 Crooke cell PitNETs,1 acidophil stem cells tumor,3 zero-cell PitNETs,and 4 silent-type sparse granular adrenocorti-cotropic hormone PitNETs;Two of them were combinations of two high-risk subtypes.Conclusion MSPs in our center are large adenomas,although their incidence is only 1.5％of Pit-NETs,2/3 cases have high-risk lineage tumor components,and the use of pituitary cell lineage transcription factors and adeno-hypophyseal hormones plays an important role in distinguishing and clarifying the different components of MSPs.

The standard system refers to the scientific organic whole formed by the internal connections of stand-ards within a certain range.The completeness of the drug standard system plays a crucial role in ensuring drug safety.Pharmacopoeia is the core of the drug standard system.This article compared the architecture of the Chi-nese Pharmacopoeia,the United States Pharmacopoeia,the European Pharmacopoeia,and the Japanese Pharma-copoeia on the aspects of overall architecture,monographs architecture,general notice architecture,general tech-nical requirements architecture,and other standard architecture,as well as the implementation of various types of standards,aiming to provide reference for the optimization and improvement of the standard system of the Chinese Pharmacopoeia.

The chemical constituents of solid rice culture of the endophytic fungus Aspergillus sp.Dq-25 from barnacle were isolated and purified by silica gel, Sephadex LH-20, C18 reversed silica gel column chromatography and recrystallization.Their structures were identified by the physical and chemical properties, and by various spectroscopic methods.Six compounds were isolated and identified as: demethyldihydropenicillic acid (1), dihydropenicillic acid (2), penicillic acid (3), fortisterol (4), 22E, 24R-3P, 5a-dihydroxyerogosta-7, 22-diene-6-one (5), and (22E, 24R)-ergosterol-7, 22-diene-3β, 5α, 9α-triol-6-one (6).Compound 1 was a new butyrolactone.MTT method was used to analyze cytotoxicity, and the result showed that compound 3 exhibited inhibitory activity on five cell lines, including K562, HeLa, SGC-7901, A542 and BEL-7402, with IC50 values of 38.0 ~ 105.0 μmol/L.

Objective:A rare case of δ-globin gene (HBD) mutation in Guangdong Province was analyzed to provide reference for avoiding misdiagnosis of δ-thalassemia in clinic.Methods:The patient was admitted to Guangdong Maternal and Child Health Hospital, and the peripheral blood sample was collected for hematological phenotypes [mean erythrocyte volume (MCV), mean erythrocyte hemoglobin content (MCH), hemoglobin (Hb)] and Hb typing analysis. The routine deletion and mutation of α-thalassemia and β-thalassemia genes were analyzed by PCR-flow fluorescence hybridization. At the same time, DNA sequencing was used to analyze the type of HBD mutation.Results:The results of hematological phenotypes analysis showed that MCV was 87.9 fl, MCH was 29.3 pg, and Hb content was 140 g/L. The results of Hb typing showed that the contents of Hb F, Hb A 2, Hb A 2 variant, and Hb A were 0.4%, 1.3%, 0.6%, and 97.7%, respectively. No abnormality was found in α-thalassemia and β-thalassemia genes by routine deletion and mutation detection. According to DNA sequencing analysis, the patient had HBD: c.349 C>G variant. Conclusion:The low Hb A 2 content (reference value is 2.5% - 3.5%) in this case is due to the mutation of HBD, HBD: c.349 C>G variant is rare in Chinese population.

Objective:To evaluate the effects of berberine on necroptosis of non-alcoholic fatty liver disease in mice and its relationship with adenosine monophosphate-activated protein kinase(AMPK)/ signal transducer and activator of transcription 6(STAT6) pathway.Methods:Twenty-five 8-week-old male C57BL/6N mice were divided into control group, steatotic liver group, berberine treatment group(200 mg·kg -1·d -1), AMPK inhibitor Compound C treatment group(0.2 mg·kg -1·d -1), and STAT6 inhibitor AS1517499 treatment group(10 mg·kg -1·d -1). After 12 weeks of intervention, the mice and liver tissue were weighed, and serum aspartate aminotransferase(AST), alanine aminotransferase(ALT), triglyceride, tumor necrosis factor-α(TNF-α), interleukin-1β(IL-1β) as well as liver malondialdehyde and superoxide dismutase were measured; liver tissue HE, Masson, and oil red O staining were performed. Western blotting was used to detect the expressions of necroptosis related proteins[receptor interaction protein kinase 3(RIPK3), phosphorylated(p-) mixed lineage kinase domain-like(MLKL)], AMPK, p-AMPK, and p-STAT6. Results:Compared with control group, the steatotic liver group had higher quality of liver and liver index, and higher levels of serum AST, ALT, triglyceride, TNF-α, IL-1β, and oxidative stress( P<0.05); Liver tissue was full of cavity changes and inflammatory cell infiltration, widely distributed red lipid droplets and obvious blue fiber dyeing; The expressions of RIPK3 and p-MLKL were up-regulated ( P<0.05), but the levels of p-AMPK and p-STAT6 were relatively reduced ( P<0.05). Compared with the steatotic liver group, berberine intervention decreased liver quality and liver index, improved liver function, reduced blood lipid levels, pro-inflammatory factor expression and oxidative stress level, and significantly alleviated the degree of liver steatosis and fibrosis, the levels of RIPK3 and p-MLKL ( P<0.05), while the expressions of p-AMPK and p-STAT6 were increased significantly ( P<0.05). As compared with the berberine treatment, AMPK and STAT6 inhibitor treatment could offset the protective effect of berberine on steatotic liver, moreover, the expressions of RIPK3 and p-MLKL were increased ( P<0.05). There was no statistical difference in AMPK total protein content among the five groups ( P>0.05). Conclusion:Berberine can activate AMPK/STAT6 pathway to inhibit the necroptosis of hepatocyte, thus plays a protective role on non-alcoholic fatty liver disease in mice.

Objective:To evaluate the role of ecto-5′-nucleotidase (CD73) in endogenous protective mechanism of hepatic ischemia-reperfusion (I/R) injury in mice and the relationship with transforming growth factor beta1 (TGF-β 1)/Smad3 signaling pathway. Methods:Twenty-four SPF healthy male C57BL/6 mice, aged 8-10 weeks, weighing 20-23 g, were divided into 3 groups ( n=8 each) by the random number table method: sham operation group (S group), hepatic I/R group (IR group) and hepatic I/R plus CD73 specific inhibitor group (APCP group). The hepatic hilum was only exposed but not occluded in group S. The hepatic portal was occluded for 30 min followed by reperfusion to develop the model of hepatic I/R in anesthetized animals in group IR.CD73-specific inhibitor APCP 40 mg/kg was intraperitoneally injected, and 10 min later hepatic I/R was performed.Orbital venous blood samples were collected at 6 h of reperfusion for determination of serum alanine transaminase (ALT) and aspartate transaminase (AST) concentrations.Then the mice were sacrificed, and liver tissues were obtained for determination of the expression of CD73, TGF-β 1 and phosphorylated Smad3 (p-Smad3) (by Western blot), contents of interleukin-1β (IL-1β) and tumor necrosis factor-alpha (TNF-α) (by enzyme-linked immunosorbent assay), and content of malondialdehyde (MDA) and activity of superoxide dismutase (SOD) (with a visible spectrophotometer) and for microscopic examination of the pathological changes of liver tissues (with a light microscope). Results:Compared with group S, the concentrations of AST and ALT in serum and contents of IL-1β, TNF-α and MDA in liver tissues were significantly increased, the activity of SOD was decreased, and the expression of CD73, TGF-β 1 and p-Smad3 was up-regulated in IR and APCP groups ( P<0.05). Compared with group IR, the concentrations of AST and ALT in serum and contents of IL-1β, TNF-α and MDA in liver tissues were significantly increased, the activity of SOD was decreased, and the expression of CD73, TGF-β 1 and p-Smad3 in liver tissues was down-regulated in group APCP ( P<0.05). The pathological changes of liver tissues were accentuated in group APCP as compared with group IR. Conclusions:CD73 is involved in the process of endogenous protective mechanism of hepatic I/R injury in mice, which may be related to the regulation of TGF-β 1/Smad3 signaling pathway.

Objective:To evaluate the role of microRNA-10a (miRNA-10a) in renal ischemia-reperfusion (I/R) injury in mice and the relationship with transforming growth factor beta1 (TGF-β 1)/Smad2 signaling pathway. Methods:Twenty-four SPF healthy male adult C57BL/6 mice, aged 8-10 weeks, weighing 20-25 g, were divided into 4 groups ( n=6 each) by the random number table method: sham operation group (S group), renal I/R group (IR group), renal I/R plus miRNA-10a antagonist group (I group), and renal I/R+ miRNA-10a agonist group (M group). The mouse model of renal I/R was developed by clamping the left renal pedicle for 45 min followed by reperfusion in anesthetized animals.miRNA-10a antagonist and agonist 20 nmol were injected via the tail vein once every 24 h for 3 consecutive days starting from 72 h before surgery in group M and group I, respectively, while the equal volume of normal saline was given instead in S and IR groups.Blood samples were collected from the orbital vein at 24 h of reperfusion to determine the concentrations of the serum creatinine (Scr) and blood urea nitrogen (BUN). Then the mice were sacrificed, and the kidney tissues were taken for determination of the malondialdehyde (MDA) content and superoxide dismutase (SOD) activity, contents of interleukin-1 beta (IL-β) and tumor necrosis factor-alpha (TNF-α) (by enzyme-linked immunosorbent assay), and expression of TGF-β 1 and phosphorylated Smad2 (p-Smad2) (by Western blot) and for microscopic examination of the pathological changes.The damage to the renal tubules was scored. Results:Compared with group S, the concentrations of Scr and BUN, contents of MDA, IL-1β and TNF-α in renal tissues and renal tubular damage score were significantly increased in IR, I and M groups, and the activity of SOD was significantly decreased, and the expression of TGF-β 1 and p-Smad2 was up-regulated in IR and M groups ( P<0.05). Compared with group IR, the concentrations of Scr and BUN, contents of MDA, IL-1β and TNF-α in renal tissues and renal tubular damage score were significantly decreased, the activity of SOD was increased, and the expression of TGF-β 1 and p-Smad2 was down-regulated in group I, and the concentrations of Scr and BUN, contents of MDA, IL-1β and TNF-α in renal tissues and renal tubular damage score were significantly increased, the activity of SOD was decreased, and the expression of TGF-β 1 and p-Smad2 was up-regulated in group M ( P<0.05). Compared with group I, the concentrations of Scr and BUN, contents of MDA, IL-1β and TNF-α in renal tissues and renal tubular damage score were significantly increased, the activity of SOD was decreased, and the expression of TGF-β 1 and p-Smad2 was up-regulated in group M ( P<0.05). Conclusions:miRNA-10a is involved in the process of renal I/R injury and is related to activation of TGF-β 1/Smad2 signaling pathway in mice.

Objective: To understand current situation and associated factors of brucellosis infection among students in Mongolian middle school in Abaga Banner, and to provide basis for further development of prevention and treatment strategies. Methods: Serological examinations were performed on pupils and middle school students in a Mongolian middle school in Abaga Banner. Questionnaire surveys were used to investigate students knowledge of eating behaviors related to brucellosis infection. Results: A total of 500 primary and middle school students were investigated, and 6 cases of brucellosis were confirmed, and the infection rate was 1.20%. There were 4 cases of male infection and 2 cases of female infection. The infection rate in boys (1.61%) was higher than that of girls (0.79%). Higher proportion was found in 14-year-old group (n=3), accounting for 17.40%. The residence period of 10-15 years includes 6 cases of all infected persons. The number of infections in Narenbaolige Town was 4, accounting for 23.40%. Univariate logistic regression analysis shows that frequent consumption of unsterilized dairy products, milking, processing lambs or slugs and infected cloth The disease was positively correlated (OR=11.80, 139.14, 8.02, P<0.05). Multivariate Logistic regression analysis showed that milking was positively correlated with brucellosis infection(OR=20.19, 95%CI=2.01-202.74, P=0.01). Conclusion The brucellosis infection of Mongolian primary and middle school students in Abaga Banner is related to a variety of related dietary factors, and its prevention and treatment should be strengthened.