2.A genetic adaptive pattern-low hemoglobin concentration in the Himalayan highlanders.
Tian-Yi WU ; Feng-Yun LIU ; Ouzhou-Loubu ; Chao-Ying CUI ; Xue-Bin QI ; Bing SU
Chinese Journal of Applied Physiology 2013;29(6):481-493
Mean hemoglobin (Hb) concentration of about 3 500 subjects derived from 17 studies of Himalayan highlanders (Tibetans, Sherpas, and Ladakhis) was compared with lowlanders (Chinese Han, Indian Tamils) lived in the Himalayas, and European climbers during Everest expeditions as well as Andean natives. The results found that Hb concentration in Himalayan highlanders was systemically lower than those reported for Andean natives and lowland immigrants. These comparative data demonstrated that a healthy native population may successfully reside at high altitude without a significant elevation in Hb, and the lower Hb levels of Himalayan highlanders than those of migrated lowlanders and Andean natives are an example of favourable adaptation over the generations. In addition, excessive polycythemia has frequently been used as a marker of chronic mountain sickness (CMS). Altitude populations who have a higher Hb concentration also have a higher incidence of CMS. The low Hb in Himalayans suggested as showing adaptation over many generations in Tibetan stock. Recent work in Tibet, suggested that Tibetans there may have adapted to high altitude as a result of evolutionary pressure selecting for genes which give an advantage at altitude. All of the population genomic and statistical analysis indicated that EPAS1 and EGLN1 are mostly likely responsible for high altitude adaptation and closely related to low Hb concentration in Tibetans. These data supported the hypothesis that Himalayan highlanders have evolved a genetically different erythropoietic response to chronic hypoxia by virtue of their much longer exposure to high altitude.
Adaptation, Physiological
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Altitude
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Asian Continental Ancestry Group
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genetics
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Basic Helix-Loop-Helix Transcription Factors
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genetics
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Evolution, Molecular
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Hemoglobins
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genetics
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Humans
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Hypoxia-Inducible Factor-Proline Dioxygenases
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genetics
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Tibet
3.Study on influence of clinical pathway management on physician diagnosis and treatment behaviors
Xiantao HUANG ; Xueliang WU ; Jun XUE ; Xueqin TANG ; Limin PAN ; Chao JING ; Biao XI
Chongqing Medicine 2017;46(20):2812-2815,2819
Objective To observe the influence of the clinical pathway management intervention on medical service behaviors.Methods The clinical cases data in a grade A class 3 hospital of Zhangjiakou City,Hebei Province during 2011-2013 were retrospectively analyzed.The influence of implementing the clinical pathway management on the diagnosis results,medical records writing quality,clinical medication,operation,hospitalization time,medical costs,assisted examination items selection were observed and analyzed.Results The admission and discharge diagnosis coincidence rate and preoperative and postoperative diagnostic coincidence rate of 3 diseases entities in the two groups were 100%,the difference had no statistical significance (P>0.05);the medical record grade-A rate in the implementing clinical pathway group was significantly higher than that in the non-implementing clinical pathway group,the medical record grade-B rate was significantly lower than that in the non-implementing clinical pathway group,the difference was statistically significant (P<0.05);the antibacterial drugs cost and drugs proportion in the implementing clinical pathway group were significantly lower than those in the non-implementing clinical pathway group,the medication proportion within the directory in the implementing clinical pathway group was significantly higher than that in the non-implementing clinical pathway group,the difference was statistically significant (P<0.05);the preoperative preparation time in the implementating clinical pathway group was less than that in the non-implementing clinical pathway group,the difference was statistically significant(P<0.05),the grade-A healing rate had no significant difference between the two groups (P>0.05);the average hospitalization time,total costs,drug costs,laboratory fee and examination fee in the implementing clinical pathway group were lower than those in the non-implementing clinical pathway group,the difference was statistically significant (P<0.05);the operation fee,healthy material fee and nursing fee had no statistically significant difference was statistically significant(P<0.05).Conclusion Implementing the clinical pathway can standardize the doctor′s diagnosis and treatment behaviors and makes the medical work to develop to be more favorable for patients.
4.Differentiation of mouse embryonic stem cells into insulin-secreting cells induced by a 5-step model system
Mu-Chao WU ; Hua CHENG ; Ming-Tong XU ; Li-Hong CHEN ; Feng LI ; Sheng-Neng XUE ;
Chinese Journal of Endocrinology and Metabolism 1986;0(03):-
Objective To induce mouse embryonic stem(ES)cells to differentiate into insulin-secreting cells by means of a 5-step model system.Methods E14.1 mouse ES cells were cultured in the presence of leukemia inhibitory factor(LIF)for 2 days(step 1),then the cells were cultured in hanging drops to form embryonic bodies(EBs)and the resulting EBs were cultured in suspension for 6 days in the presence of basic fibroblast growth factor bFGF(step 2).Subsequently the EBs were cultured in the medium containing glucagon- like peptide 1(GLP-1),hepatocyte growth factor(HGF),nerve growth factor(NGF)and nicotinamide for 10 days(step 3).After that,the EBs were dissociated into single cells,and the cells were cultured in monolayer in the presence of GLP-1,betacellulin,activin A,bFGF and nicotinamide for 10 days(step 4).Finally,the cells were cultured in low-glucose medium containing nicotinamide for 4 days(step 5).Insulin and some other islet- related genes expressions were investigated using RT-PCR and insulin expression was also investigated by DTZ- staining and immunohistochemistry.The percentage of insulin-secreting cells was evaluated by flowcytometry and insulin concentrations were measured by RIA.Results mRNA expression of insulin became visible at step 3 and more evident at step 5.Additionally,at step 5,mRNAs of glucagon,somatostatin,pancreatic polypeptide(PP), pancreatic duodenal homeobox 1(PDX-1),beta-cell E box transactivator 2(Beta2)and neurogenin 3(Ngn3) were detected.DTZ-staining positive cells and insulin immunohistochemical staining positive cells were observed. The percentage of insulin-positive cells was(24.0?2.5)%(n=6).In the presence of 5.6 mmol/L and 25 mmol/L glucose,insulin concentrations were(0.05?0.01)?g/L and(0.13?0.02)?g/L respectively(n= 6).Conclusion E14.1 mouse ES cells can be induced to differentiate into insulin-secreting cells by the 5-step model system.Insulin-secreting cells can release insulin into culture medium when treated with glucose,and insulin concentrations increase with rising concentration of glucose.
5.The correlation between TLR2 gene -597T/C polymorphism and primary ANCA associated small vasculitis of Han population in Guangxi
Suzhen WEI ; Chao XUE ; Yunhua LIAO ; Yanfei LAI ; Chunxiang WU ; Linlin HE ; Aimei GONG
The Journal of Practical Medicine 2016;32(7):1092-1096
Objective To investigate the correlation between Toll-like receptor2 (TLR2) gene promoter region -597T/C polymorphism and primary ANCA associated small vasculitis (AAV) in Guangxi Han people. Methods A case contrastive control study was adopted in the study. Patients with AAV (patients group, n=110) and healthy people (control group, n = 200) were recruited. Associated serum indexes were detected and polymorphisms of TLR2 gene promoter 597T/C were analyzed by polymerase chain restricted fragment length polymorphisms (PCR-RFLP). Results (1)Three TLR2-597T/C genotypes were discovered in 110 AAV patients, namely, TT, TC and CC, with the frequency of 54.55%,40.00% and 5.45% respectively. And the frequencies of allele T and C were 74.55% and 25.45%. In control group, the genotype frequencies of TT, TC and CC were 56.00%,40.50% and 3.50%, with 76.25% of allele T and 23.75% of allele C. No significant differences were found in neither genotype distribution nor allele frequencies between the patients group and control group ( P > 0 . 05 ) . ( 2 ) Significant differences were found in the incidence of proteinuria rate and the hemoglobin (P< 0.05)in AAV patients. (3)There was no significant difference between AI and CI in TT, TC and CC genotype in AAV patients. Conclusions Polymorphism of TLR2-597T/C may be correlated with the incidence of proteinuria and the level of hemoglobin, while no obvious correlation with the genetic susceptibility of ANCA in vasculitis patients of Guangxi Han people.
6.The correlation between toll-like receptor 9 gene 2848G/A polymorphism and primary anti-neutrophil ;cytoplasmic antibodies associated small vasculitis
Baichan CAO ; Chao XUE ; Yunhua LIAO ; Chunxiang WU ; Qian PENG ; Xiaoli WEI ; Jiang ZHOU ; Kunpeng BU
Chinese Journal of Rheumatology 2015;(7):473-476
Objective To investigate the correlation between toll-like receptor 9 (TLR9) gene 2848G/A polymorphism and primary antineutrophil cytoplasmic antibodies (ANCA) associated small vasculitis (AAV). Methods A case-control study was performed among 135 patients diagnosed with AAV and 140 disease-free control and we test the serum biochemical parameter. Polymorphism was analyzed by polymerase chain restricted fragments length polymorphism. As for statistic method, according to the character of data, we performed t-test, chi-square test, Spearman grade related analysis and one-way ANOVA. Results ① The frequencies of AA, GG, GA genotype of TLR9 2848 in AAV patients were 14.07%, 38.52%, and 47.71%, respectively; ② Significant increase in IgM was observed in AA genotype than GG+GA genotype in AAV patients (F=4.561, P<0.05). ③ There was no significant difference between AI and CI in AA, GA and GG genotype in AAV patients (F=2.115, 0.760, P>0.05). Conclusion AA, GA and GG genotypes are detected in TLR9 2848G/A in patients with AAV in Guangxi, without significant correlation with susceptibility to primary AAV in Guangxi.
7.Progress of potential therapeutic targets and small molecule ligands of anti-colorectal cancer pathogenic Fusobacterium nucleatum
Xue-xin BAI ; Ya-hui HUANG ; Chun-quan SHENG ; Shan-chao WU
Acta Pharmaceutica Sinica 2023;58(3):639-645
The composition of intestinal microflora is closely related to the occurrence and development of colorectal cancer (CRC). Among them,
9.Screening of Poly-?-glutamic Acid High Productive Strain and Optimization of Fermentation Medium
Xue-Chao WU ; Xin-Jiang CAO ; Zhi-Xia JI ; Shou-Wen CHEN ;
Microbiology 2008;0(10):-
Bacillus subtilis B6-1 was used as an original strain for mutagenic treatment and a defined medium was used as the selective medium. A mutant named B. subtilis W003 was isolated after three serial ultraviolet (UV) irradiations and one diethyl sulfate (DES) treatment. The ?-PGA yield on a rotary shaker was enhanced from 10.9 g/L in parental strain to 20.5 g/L in the mutant. It was illustrated by single factor experiments that the optimal carbon and nitrogen sources were glucose and (NH4)2SO4 respectively. The optimal fermentation medium was achieved by orthogonal test. In the optimal medium, a ?-PGA yield of 45.3 g/L was obtained after 36 h cultivation.