Humans ; Indicators and Reagents ; supply & distribution ; Occupational Health

OBJECTIVETo observe protective effects of Schisandra extract (SE) on embryotoxicity and reproductive toxicity of early pregnant rats exposed to Benzo[a]pyrene (Bap).

METHODSPregnant rat model was prepared using periodic screening cage method. Totally 50 female pregnant SD rats were divided into five groups by randomized block design according to the weight, i.e., the BaP model group, the low dose SE group, the middle dose SE group, the high dose SE group, the normal control group, 10 rats in each group. Rats in the BaP model group were administered with BaP at a daily dose of 2 mg/kg by gastrogavage. Rats in low, middle, and high dose SE groups were administered by gastrogavage with BaP (at a daily dose of 2 mg/kg) plus SE at a daily dose of 40, 200, and 1 000 mg/kg, respectively. Equal volume of olive oil was administered to rats in the normal control group by gastrogavage. All medication was performed for 8 successive days. Changes of rat body weight in each period were observed. The uterus embryonic total quality and ovary quality were measured, and organ index calculated. The number of corpus luteum, the number of embryo implantation, and the number of absorbed embryo were statistically calculated respectively. The implantation rate and the absorbed embryos rate were calculated. Serum levels of human chorionic gonadotrophin β (β-HCG) and progesterone (PROG) were detected by ELISA.

RESULTSCompared with the normal control group, the weight of 9-day pregnant rats, the number of embryo implantation, the uterus embryonic total index, ovary index, serum levels of β-HCG and PROG all decreased in the Bap model group with significant difference (P < 0.05, P < 0.01). Compared with the Bap model group, body weight, the uterus embryonic total index, and the PROG level increased in 3 dose SE groups (P < 0.05, P < 0.01). Ovary index and serum β-HCG increased in middle and high dose SE groups (P < 0.05, P < 0.01). The number of implantation obviously increased in the high dose SE groups (P < 0.01).

CONCLUSIONSE could reduce the embryotoxicity and reproductive toxicity of early pregnant rats exposed to Benzo[a]pyrene.

Animals ; Benzo(a)pyrene ; toxicity ; Chorionic Gonadotropin ; blood ; Embryo Implantation ; drug effects ; Female ; Ovary ; drug effects ; Plant Extracts ; pharmacology ; Pregnancy ; Progesterone ; blood ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Reproduction ; drug effects ; Schisandra ; chemistry ; Uterus ; drug effects

OBJECTIVETo study the effect of sophoridine against bone cancer pain in bone cancer pain model rats induced by W256 tumor cells and its mechanism.

METHODThe rat model of bone cancer pain was reproduced by injecting W256 tumor cells into the rat marrow cavity. Ten days after the model establishment, 36 rats were selected and randomly divided into the model control group and the sophoridine treated group. At the same time, other 10 rats with sham-operation were selected to be the normal control group. Since the 15th day after the operation, rats in the treated group had been given sophoridine (25 mg x kg(-1)) for 10 days. The mechanical withdrawal threshold and the thermal withdrawal latency of each group were measured before and after the treatment. After the last treatment, the radiological and histopathological observation shall be conducted for sick legs of all rats. The expressions of cyclooxygenase-2 (COX-2) and vascular endothelial growth factor (VEGF) in tumor tissues were detected by mmunohistochemistry.

RESULTSophoridine could significantly increase the mechanical withdrawal threshold and the thermal withdrawal latency (P < 0.05, P < 0.01), significantly relief the bone injury caused by W256 tumor cells (P < 0.05), and notably down-regulate the COX-2 and VEGF expressions in tumor tissues (P < 0.05).

CONCLUSIONSSophoridine has the effect in relieving pain and inhibiting tumor progression in bone cancer pain rats induced by W256 tumor cells. Its mechanism may be related to the down-regulated expressions of COX-2 and VEGF.

Alkaloids ; pharmacology ; therapeutic use ; Animals ; Bone Neoplasms ; complications ; Cell Line, Tumor ; Cyclooxygenase 2 ; metabolism ; Female ; Gene Expression Regulation, Neoplastic ; drug effects ; Hyperalgesia ; complications ; drug therapy ; Pain ; complications ; diagnostic imaging ; drug therapy ; metabolism ; Quinolizines ; pharmacology ; therapeutic use ; Rats ; Rats, Sprague-Dawley ; Tomography, X-Ray Computed ; Vascular Endothelial Growth Factor A ; metabolism

Abstract: Objective　To analyze the epidemiological characteristics of public health emergencies in Xishuangbanna Dai Autonomous Prefecture from 2012 to 2021, and to provide reference for formulating relevant prevention and control measures. Methods　The data of public health emergencies reported in Xishuangbanna from 2012 to 2021 were collected and analyzed through the China Disease Prevention and Control Information System. Results A total of 78 public health emergencies (including "Unrated" events) were reported in Xishuangbanna from 2012 to 2021. The highest 21 cases and the lowest 3 cases were reported every year. A total of 1 0374 cases were reported in 78 public health emergencies, involving a population of 1 703 049, with a morbidity of 609.14/100 000, 24 deaths, mortality of 1.41/100 000 and fatality rate of 231.35/100 000. The event level was mainly "general (level Ⅳ)" with 52 incidents, accounting for 66.67%, and 17 incidents of "major (level Ⅲ)", accounting for 21.79%. 51 cases were mainly infectious diseases, accounting for 65.39%. The peak periods for incidents were May-July and November-February of the next year; there were 39 incidents in schools, accounting for 50%, followed by 20 incidents in families, accounting for 25.64%. The top three reported cases were food poisoning (32.05%), chicken pox 17 (21.79%) and dengue fever 10 (12.82%). Among the 24 deaths in public health emergencies, 22 were caused by food poisoning. Wild bacteria poisoning and alcohol poisoning were the main causes of food poisoning, accounting for 45.83% and 37.5% of the total deaths, respectively. Conclusion Infectious diseases, especially respiratory diseases and food poisoning are the focus of the prevention and control of public health emergencies in Xishuangbanna Dai Autonomous Prefecture, of which Schools and families should be pay close attention. Plague, a Class A infectious disease, caused by the bacterium Yersinia pestis has occurred in two inter-animal outbreaks in 10 years and spread to the population, which should be of great concern.

Child ; Humans ; Lymphoma, T-Cell ; complications ; Panniculitis ; etiology ; Subcutaneous Tissue

Chronic Periodontitis ; complications ; diagnosis ; diagnostic imaging ; therapy ; Dental Pulp Diseases ; complications ; diagnosis ; diagnostic imaging ; therapy ; Dental Scaling ; Female ; Humans ; Periodontal Debridement ; Periodontal Diseases ; complications ; diagnosis ; diagnostic imaging ; therapy ; Radiography ; Root Canal Therapy ; Root Planing ; Young Adult

Objective To investigate the life quality in infants with food allergy before and after treatment by using of Food Allergy Quality of Life Questionnaire - Parent Form(FAQLQ - PF). Methods The severity of eczema in 46 children with food allergy was determined by eczema area and severity index(EASI). The life quality of such infants was assessed by the FAQLQ - PF after 2 - months treatment. Results (1)Among the 50 subjects,46(92% )respon-ded to the tests;the average age was(4. 78 ± 1. 48)months. Twenty - nine(63. 04% )subjects had family history of allergic disease. Egg(73. 91% )was the most common allergen,followed by cow milk(43. 48% ),fish and shrimp (8. 70% ),and carrot(4. 35% ).(2)The scores of EASI,FAQLQ - PF in children with food allergy before treatment were 13. 20 ± 12. 86 and 2. 12 ± 1. 33,respectively,the scores after treatment declined(2. 02 ± 4. 40 and 1. 33 ± 1. 08, respectively),there was a statistical significance(t = 28. 070,4. 014,all P ﹤ 0. 05).(3)Compared with pre - treat-ment,the scores of emotional impact subscale and food anxiety subscale declined,from 2. 10 ± 1. 47 and 2. 63 ± 1. 83 to 1. 30 ± 1. 09 and 1. 68 ± 1. 37,respectively,and there were statistically significant differences(t = 5. 204,8. 818,all P ﹤ 0. 05).(4)There was a positive correlation between the EASI and FAQLQ - PF scores(ρ = 0. 205,P ﹤ 0. 05). Conclusions Food allergy adversely affects the quality of life in infants. The poor life quality is associated with more severe symptoms. The life quality in infants and parents can be improved by standardized treatment.

Background It is well known that the diminution of visual acuity appears before notable complications in some high myopic eyes.However,whether the impaired vision is associated with the change of retinal thickness at macula area is still under investigation.Objective This study was to investigate the relationship of macular retinal thickness with the change of visual acuity in high myopic eyes.Methods A consecutive caseobservational study was performed.Two hundred and forty-five eyes of 132 patients with the diopter of-6.00～-20.00 D were enrolled in this study during the January 2011 to January 2012 in Beijing Tongren Eye Center.All of the patients received the measurement of retinal thickness with Fourier Domain Optical Coherence Tomography (FDOCT),and the scan mode was MM6.The eyes were divided into the corrected vision ≥0.9 group and the corrected vision ≤0.8 group.In addition,the eyes were assigned to the non-posterior staphyloma group,posterior staphyloma Ⅰ group (macular symmetry) and posterior staphyloma Ⅱ group (macular gradient).The retinal thicknesses in different quadrants at the macular zone were measured and calculated by OCT software.Results The demography was matched in different groups.Corrected visual acuity was significantly increased in the corrected vision ≥ 0.9 group than that in the corrected vision ≤0.8 group (1.02±0.16 vs.0.62±0.08) (t=3.233,P=0.001).Retinal thickness value at fovea was (256.28±13.19) μm in the corrected vision ≥0.9 group,and that in the corrected vision ≤0.8 group was (231.17 ± 10.96) μm,with a significant difference between the two groups (t =2.134,P =0.031).The corrected visual acuity was 1.00±0.27,0.78±0.21 and 0.90±0.13 in the non-posterior staphyloma group,posterior staphyloma Ⅰ group and posterior staphyloma Ⅱ group,respectively,showing significant difference among the three groups (F=15.760,P=0.015),and the corrected visual acuity of the non-posterior staphyloma group and posterior staphyloma Ⅱ group were significantly higher than that of posterior staphyloma Ⅰ group (q =16.131,P =0.006 ; q =-10.831,P=0.008).A significant difference also was seen in the mean retinal thickness among the three groups (F=2.316,P =0.025).The mean retinal thickness in the posterior staphyloma Ⅰ group was (234.21 ± 15.69) μm,which was significantly smaller than (252.25± 15.31) μm of the posterior staphyloma Ⅱ group (q =12.977,P =0.023).There were no significant difference in the retinal thickness at para-fovea area among the three groups (F=0.318,P =0.078).However,significant difference was found at peri-fovea area in different groups (F=1.925,P =0.013).The mean retinal thicknesses at peri-fovea area was (273.26 ± 16.37) μm in the posterior staphyloma Ⅱ group and was significantly smaller than (289.11 ± 19.30) μm of the posterior staphyloma Ⅰ group and (290.33 ± 17.12) μm of the non-posterior staphyloma group (q =-8.305,P =0.023 ; q =-7.011,P =0.012).Conclusions The retinal thickness at fovea is associated with the corrected visual acuity in high myopic eyes.The thinning of retinal thickness at the vertex of posterior staphyloma is one of causes of visual function impairment.

OBJECTIVETo explore the biological mechanisms underlying Angelica sindsis polysaccharide (ASP) -induced aging of human-derived leukemia stem cells (LSCs) in vitro.

METHODAcute myelogenous leukemia stem cells were isolated by magnetic activated cell sorting (MACS). The ability of LSC proliferation treated by various concentration of ASP(20-80 mg · L(-1)) in vitro for 48 hours were tested using cell counting Kit-8 ( CCK8) , colony forming were evaluated by methylcellulose CFU assay. The ultra structure changes of AML CD34+ CD38- cells were analyzed by transmission electron microscopy. The aging cells were detected with senescence-β-galactosidase Kit staining. Expression of aging-related p53, p21, p16, Rb mRNA and P16, Rb, CDK4 and Cyclin E protein were detected by quantitative reverse transcription polymerase chain reaction( qRT-PCR) and Western blotting, respectively.

RESULTThe purity of the CD34 + CD38 - cells is (91.15 ± 2.41)% after sorted and showed good morphology. The proliferation of LSC was exhibited significantly concentration-dependent inhibited after exposure to various concentration of ASP. Treated by 40 mg · L(-1) ASP for 48 hours, the percentage of positive cells stained by SA-β-Gal was dramatically increased (P < 0.01) and the colony-formed ability has been weakened (P < 0.01). The observation of ultrastructure showed that cell heterochromatin condensation and fragmentation, mitochondrial swelling, lysosomes increased in number. Aging-related p53, p21, p16, Rb and P16, Rb were up-regulated, protein regulatory cell-cycle CDK4 and Cyclin E were down-regulated. ASP may induce the senescence of LSCs effectively in vitro, P16-Rb cell signaling pathway play a significant role in this process.

CONCLUSIONASP can induce human leukemia stem cell senescence in vitro, the mechanism involved may be related to ASP regulation P16-Rb signaling pathways.

Angelica sinensis ; chemistry ; Cell Cycle ; drug effects ; Cell Cycle Proteins ; genetics ; metabolism ; Cells, Cultured ; Cellular Senescence ; drug effects ; Drugs, Chinese Herbal ; pharmacology ; Gene Expression Regulation, Leukemic ; drug effects ; Humans ; Leukemia ; drug therapy ; genetics ; metabolism ; physiopathology ; Neoplastic Stem Cells ; cytology ; drug effects ; Polysaccharides ; pharmacology ; Signal Transduction ; drug effects

This study aims to investigate the genetic characteristics of BZLF1 gene and its promoter Zp of the epidemic strains in children with primary Epstein-Barr virus (EBV)-associated diseases. Total DNA was extracted from the peripheral blood of 134 children with EBV-associated infectious mononucleosis (EBV-IM) and 32 children with EBV-associated hemophagocytic lymphohistiocytosis (EBV-HLH) who were admitted to Beijing Children's Hospital from 2006 to 2011. The EBNA3C, BZLF1, and Zp genes were amplified by PCR assay. Typing of EBV was performed according to the size of the amplification product of EBNA3C gene; the amplification products of BZLF1 and Zp genes were subjected to direct sequencing, and sequence analysis was performed using BioEdit 7. 0. 9. The results were as follows: (1) EBV-1 was present in 140 samples (97.2%, 140/144) and EBV-II in 4 samples (2.8%, 4/144). (2) Three BZLF1 genotypes and their 12 subtypes (including 6 newly found subtypes) were detected in this study; there were no significant differences in the frequencies of BZLF1-A and BZLF1-B between the children with EBV-IM and EBV-HLH (P = 0.083); BZLF1-A1 was the dominant genotype in children with EBV-associated diseases; t BZLF1-A mostly had three 29-bp repeats in the first intron of BZLF1 gene, and BZLF1-B mostly had 30-bp repeats (P = 0.000), with the number of repeats varying from 1 to 13. (3) Four Zp genotypes were detected in this study, including Zp-P, Zp-V3, Zp-V4, and Zp-V1; there were no significant differences in the frequencies of these Zp genotypes between children with EBV-IM and EBV-HLH (P = 0.272, 0.252, 1.0, and 1.0, respectively). (4) The linkage analysis of BZLF1 gene and its promoter Zp showed that BZLF1-A1 was highly associated with Zp-V3 (P = 0.000), while BZLF1-B4 with Zp-P (P = 0.000); EBV-I + BZLF1 A1 was highly associated with Zp-V3 (P = 0.000), while EBV-I+BZLF1-B4 with Zp-P (P = 0.000). The conclusions are as follows: (1) BZLF1-A1 is the dominant genotype in children with EBV-associated diseases; there are mostly 29-bp repeats in the first intron of BZLF1 gene for BZLF1-A genotype and 30-bp repeats for BZLF1-B genotype. (2) Zp-P and Zp-V3 are dominant Zp genotypes of EBV in children, which shared similar detection rates. (3) BZLF1-A1 is highly associated with Zp-V3, while BZLF1-B4 with Zp-P; EBV-I+BZLF1-A1 is highly associated with Zp-V3, while EBV-I+BZLF1-B4 with Zp-P.
Child ; Child, Preschool ; China ; epidemiology ; Epstein-Barr Virus Infections ; epidemiology ; virology ; Female ; Genotype ; Herpesvirus 4, Human ; genetics ; physiology ; Humans ; Infant ; Infant, Newborn ; Introns ; genetics ; Male ; Promoter Regions, Genetic ; genetics ; Repetitive Sequences, Nucleic Acid ; genetics ; Trans-Activators ; genetics