1.Serum TSH levels in women aged 40 and above : association with lifespan and 10-year mortality
Ping XU ; Nianchun PENG ; Miao ZHANG ; Ying HU ; Rui WANG ; Juan HE ; Qiao ZHANG ; Lixin SHI
Chinese Journal of Endocrinology and Metabolism 2024;40(2):132-138
Objective:To investigate the relationship between thyroid-stimulating hormone(TSH) levels and 10-year mortality in women aged 40 years and older.Methods:Residents aged 40 and over in urban areas of Guiyang City who participated in the " Epidemiological Study of Cancer Risk in Patients with Type 2 Diabetes in China(REACTION)" were followed up in 2011. Finally, 5 614 people were enrolled, and the baseline general information, physical examination and TSH detection were carried out. The average follow-up was(9.77±1.55) years, and the treatment and death of thyroid-related diseases were recorded. The Cox proportional hazards model was used to analyze the relationship between TSH level and 10-year mortality in middle-aged and elderly women, and plotting survival time curves(Kaplan-Meier curves) to study the association between elevated TSH levels and lifespan in subjects under 65 years old. Results:The multivariate Cox proportional hazards model showed that compared with the normal group, after multivariate adjustment, the risk of death in the TSH increased group was decreased( HR=0.644, 95% CI 0.478-0.868, P<0.05); after stratifying the elevated TSH group, the risk of death was decreased in the slightly elevated TSH group( HR=0.566, 95% CI 0.405-0.791, P<0.001); the elevated TSH group was further stratified by age. In the group under 65 years old, compared to the normal group, the mildly elevated group showed a reduced risk of mortality( HR=0.429, 95% CI 0.245-0.751, P=0.003). In the group aged 65 and above, there were no statistically significant differences in mortality risk between the mildly elevated group, severely elevated group, and the normal group( P>0.05). In the group under 65 years old, the K-M curve indicated that the survival rate of the mildly elevated TSH group was significantly higher than that of the normal group( χ2=11.931, P=0.003), the difference was statistically significant. Conclusion:Mildly elevated TSH levels in women aged 40-65 years are associated with a reduced risk of all-cause death and longer lifespan.
2.Different methods in predicting mortality of pediatric intensive care units sepsis in Southwest China
Rong LIU ; Zhicai YU ; Changxue XIAO ; Shufang XIAO ; Juan HE ; Yan SHI ; Yuanyuan HUA ; Jimin ZHOU ; Guoying ZHANG ; Tao WANG ; Jianyu JIANG ; Daoxue XIONG ; Yan CHEN ; Hongbo XU ; Hong YUN ; Hui SUN ; Tingting PAN ; Rui WANG ; Shuangmei ZHU ; Dong HUANG ; Yujiang LIU ; Yuhang HU ; Xinrui REN ; Mingfang SHI ; Sizun SONG ; Jumei LUO ; Juan LIU ; Juan ZHANG ; Feng XU
Chinese Journal of Pediatrics 2024;62(3):204-210
Objective:To investigate the value of systemic inflammatory response syndrome (SIRS), pediatric sequential organ failure assessment (pSOFA) and pediatric critical illness score (PCIS) in predicting mortality of pediatric sepsis in pediatric intensive care units (PICU) from Southwest China.Methods:This was a prospective multicenter observational study. A total of 447 children with sepsis admitted to 12 PICU in Southwest China from April 2022 to March 2023 were enrolled. Based on the prognosis, the patients were divided into survival group and non-survival group. The physiological parameters of SIRS, pSOFA and PCIS were recorded and scored within 24 h after PICU admission. The general clinical data and some laboratory results were recorded. The area under the curve (AUC) of the receiver operating characteristic curve was used to compare the predictive value of SIRS, pSOFA and PCIS in mortality of pediatric sepsis.Results:Amongst 447 children with sepsis, 260 patients were male and 187 patients were female, aged 2.5 (0.8, 7.0) years, 405 patients were in the survival group and 42 patients were in the non-survival group. 418 patients (93.5%) met the criteria of SIRS, and 440 patients (98.4%) met the criteria of pSOFA≥2. There was no significant difference in the number of items meeting the SIRS criteria between the survival group and the non-survival group (3(2, 4) vs. 3(3, 4) points, Z=1.30, P=0.192). The pSOFA score of the non-survival group was significantly higher than that of the survival group (9(6, 12) vs. 4(3, 7) points, Z=6.56, P<0.001), and the PCIS score was significantly lower than that of the survival group (72(68, 81) vs. 82(76, 88) points, Z=5.90, P<0.001). The predictive value of pSOFA (AUC=0.82) and PCIS (AUC=0.78) for sepsis mortality was significantly higher than that of SIRS (AUC=0.56) ( Z=6.59, 4.23, both P<0.001). There was no significant difference between pSOFA and PCIS ( Z=1.35, P=0.176). Platelet count, procalcitonin, lactic acid, albumin, creatinine, total bilirubin, activated partial thromboplastin time, prothrombin time and international normalized ratio were all able to predict mortality of sepsis to a certain degree (AUC=0.64, 0.68, 0.80, 0.64, 0.68, 0.60, 0.77, 0.75, 0.76, all P<0.05). Conclusion:Compared with SIRS, both pSOFA and PCIS had better predictive value in the mortality of pediatric sepsis in PICU.
3.Application of serum lncRNA-PACER and lncRNA-p21 in early diagnosis of bacterial pneumonia in elderly patients over 65 years old
Juan HE ; Rui WANG ; Hao ZOU ; Xin WANG
International Journal of Laboratory Medicine 2024;45(21):2657-2661
Objective To explore the application of serum long non-coding RNA PACER(lncRNA-PAC-ER)and non-coding RNA-p21(lncRNA-p21)in the early diagnosis of bacterial pneumonia in the elderly.Methods A total of 120 elderly patients with pneumonia admitted to the hospital from October 2021 to De-cember 2022 were selected as the research objects,and they were divided into a bacterial pneumonia group(65 cases)and a viral pneumonia group(55 cases).At the same time,120 healthy people who underwent physical examination in the hospital were selected as the control group.The levels of serum lncRNA-PACER and ln-cRNA-p21 were compared among the three groups.Receiver operating characteristic(ROC)curve was used to analyze the diagnostic value of serum lncRNA-PACER and lncRNA-p21 for bacterial pneumonia in the elder-ly.Multivariate Logistic regression was used to analyze the influencing factors of bacterial pneumonia in the elderly.Results The differences in serum levels of lncRNA-PACER and lncRNA-p21 in the three groups were statistically significant(P<0.05).The level of lncRNA-PACER in bacterial pneumonia group was high-er than those in the viral pneumonia group and the control group,and the level of lncRNA-p21 in bacterial pneumonia group was lower than those in the viral pneumonia group and the control group(P<0.05).The differences in serum levels of lncRNA-PACER and lncRNA-p21 among the three groups with different severi-ty of senile bacterial pneumonia were statistically significant(P<0.05).With the aggravation of the disease,the level of serum lncRNA-PACER gradually increased,and the level of lncRNA-p21 gradually decreased(P<0.05).ROC curve results showed that the area under the curve(AUC)of lncRNA-PACER for predicting the bacterial pneumonia was 0.858,AUC of lncRNA-p21 for predicting the bacterial pneumonia was 0.838,and the AUC of the combination of the two for predicting the bacterial pneumonia was 0.930,which was sig-nificantly higher than the AUC of the two alone,and the sensitivity and the specificity were 90.91%and 86.15%,respectively.Multivariate Logistic regression analysis showed that lncRNA-PACER and lncRNA-p21 were both influencing factors in the occurrence of bacterial pneumonia(P<0.05).Conclusion The level of serum lncRNA-PACER is increased and the level of serum lncRNA-p21 is decreased in elderly patients with bacterial pneumonia.Serum lncRNA-PACER and lncRNA-p21 levels may be related to the occurrence and de-velopment of bacterial pneumonia in elderly patients,and could be used as auxiliary evaluation indicators to predict bacterial pneumonia in elderly patients.
4.Analysis of Acupoint Selection Rules of Effective Prescriptions for Acupuncture Treatment of Non-Small Cell Lung Cancer
Rui ZHOU ; Yan-Juan ZHU ; Hao-Chuan MA ; Xue-Song CHANG ; Ya-Dong CHEN ; Yi-Han HE ; Hai-Bo ZHANG
Journal of Guangzhou University of Traditional Chinese Medicine 2024;41(7):1827-1832
Objective To analyse the acupoint selection rules of acupuncture in the treatment of non-small cell lung cancer,and to provide reference for clinical application.Methods The clinical research,practitioner's experience and academic thought of acupuncture treatment for non-small cell lung cancer were retrieved to obtain the acupuncture prescriptions of modern practitioners for the treatment of non-small cell lung cancer.Based on the statistical methods of acupoint frequency,prescription rules,acupoint clustering and core combination,the core theoretical system and acupoint selection rules of acupuncture treatment of non-small cell lung cancer by modern practitioner were analyzed.Results According to the inclusion and exclusion criteria,94 acupuncture prescriptions were finally included.There were eight acupoints used more than 20 times,which were Zusanli(ST36),Neiguan(PC6),Feishu(BL13),Sanyinjiao(SP6),Qihai(RN6),Guanyuan(RN4),Hegu(LI4)and Zhongwan(RN12).The top three high-frequency acupoint combinations were Zusanli-Neiguan,Zusanli-Sanyinjiao and Qihai-Zusanli;correlation analysis showed that the correlation strength of Zusanli-Neiguan was the highest,followed by Zusanli-Sanyinjiao and Zusanli-Hegu.The cluster analysis showed that the acupoints with frequency>10 times could be divided into three categories.Category 1 includes:Zusanli,Neiguan,Sanyinjiao,Hegu;category 2 includes Guanyuan,Qihai,Zhongwan,Xuehai(SP10),Taichong(LR3);category 3 consists of two parts,one is Danzhong(RN17),Tiantu(RN22),Fenglong(ST40),Taiyuan(LU9);the second is Feishu(BL13),Lieque(LU7),Chize(LU5),Zhongfu(LU1),Xinshu(BL15),Gaohuang(BL43),Fengmen(BL12).Conclusion The core acupoints for acupuncture treatment of non-small cell lung cancer include four categories:① invigorating the spleen and benefiting qi:Zusanli,Sanyinjiao,Zhongwan and Fenglong;②replenishing and supplementing original qi:Guanyuan,Qihai and Gaohuang;③regulating qi and broadening the chest:Danzhong,Neiguan,Tiantu and Fengmen;④ diffusing the lung and ventilating qi:Feishu,Hegu,Chize and Lieque.The three treatment methods of replenishing qi,regulating qi and venting pathogen are the basis of acupuncture treatment of advanced non-small cell lung cancer.The core idea of acupuncture treatment of non-small cell lung cancer focuses on supplementation,supplemented by dredging,and to dredge and supplement simultaneously.
5.Observation on the therapeutic effect of methylprednisolone combined with mycophenolate mofetil in the treatment of moderate to severe active Graves eye disease
Xuanlu WANG ; Ying HU ; Nianchun PENG ; Jing XU ; Juan HE ; Banghui XIAO ; Rui WANG ; Yi XU ; Miao ZHANG
The Journal of Practical Medicine 2024;40(21):3067-3075
Objective To assess the effectiveness and safety of combining methylprednisolone with myco-phenolate mofetil in managing moderate to severe active Graves'ophthalmopathy(GO),and to compare its efficacy against methylprednisolone monotherapy.Methods A retrospective study was conducted to select patients with moderate to severe active GO who received treatment at the Department of Endocrinology and Metabolism,Guizhou Medical University Affiliated Hospital,from January 2019 to January 2024.The patients were divided into two groups:a combination group receiving methylprednisolone combined with mycophenolate mofetil,and a mono-therapy group receiving methylprednisolone alone.The objective was to compare changes in visual score,appearance score,clinical activity score(CAS),eye protrusion,eye fissure width,and eye movement between the two groups of patients while documenting any adverse events.Results A total of 98 patients were enrolled in the study,comprising 32 patients in the combination group and 61 patients in the monotherapy group.Both groups exhibited improvements in quality of life scores,CAS,and degree of protrusion following treatment compared to baseline.However,at the end of the 12-week treatment period,there was no statistically significant difference(P>0.05)observed between the two groups regarding changes in visual scores,appearance scores,CAS,protrusion degree,fissure width,and proportion of reduced eye movement before and after treatment.Notably though,the combined therapy group demon-strated a significantly higher improvement rate for pain relief and reduction of eyelid congestion during eye movement when compared to the monotherapy group(P<0.001).At the endpoint of treatment,there were no statistically significant differences in appearance score,protrusion degree,tear width,and reduction in eye movement between the two groups before and after treatment(P>0.05).The combination group exhibited higher visual scores and greater improvement in CAS compared to the monotherapy group(P<0.05),along with a higher rate of eyelid edema improvement(P<0.05).At 12 weeks,the monotherapy group had an effective rate of 65.0%,while the combination group had an effective rate of 66.7%.By week 24,the combined group achieved an effective rate of 80.0%.The over-all effectiveness at week 12 and treatment endpoints did not show any statistically significant differences between the two groups(P>0.05).No cases of leukopenia or severe infection occurred in the combination group.Conclusions The combination therapy of methylprednisolone and mycophenolate mofetil demonstrates efficacy,tolerability,and safety in the treatment of moderate to severe active GO.While the overall effectiveness of this combination may not surpass that of hormone therapy alone,it exhibits potential superiority in improving visual scores,eyelid congestion,eyelid edema,and eye movement pain when compared to hormone therapy alone.
6.A multicenter study of neonatal stroke in Shenzhen,China
Li-Xiu SHI ; Jin-Xing FENG ; Yan-Fang WEI ; Xin-Ru LU ; Yu-Xi ZHANG ; Lin-Ying YANG ; Sheng-Nan HE ; Pei-Juan CHEN ; Jing HAN ; Cheng CHEN ; Hui-Ying TU ; Zhang-Bin YU ; Jin-Jie HUANG ; Shu-Juan ZENG ; Wan-Ling CHEN ; Ying LIU ; Yan-Ping GUO ; Jiao-Yu MAO ; Xiao-Dong LI ; Qian-Shen ZHANG ; Zhi-Li XIE ; Mei-Ying HUANG ; Kun-Shan YAN ; Er-Ya YING ; Jun CHEN ; Yan-Rong WANG ; Ya-Ping LIU ; Bo SONG ; Hua-Yan LIU ; Xiao-Dong XIAO ; Hong TANG ; Yu-Na WANG ; Yin-Sha CAI ; Qi LONG ; Han-Qiang XU ; Hui-Zhan WANG ; Qian SUN ; Fang HAN ; Rui-Biao ZHANG ; Chuan-Zhong YANG ; Lei DOU ; Hui-Ju SHI ; Rui WANG ; Ping JIANG ; Shenzhen Neonatal Data Network
Chinese Journal of Contemporary Pediatrics 2024;26(5):450-455
Objective To investigate the incidence rate,clinical characteristics,and prognosis of neonatal stroke in Shenzhen,China.Methods Led by Shenzhen Children's Hospital,the Shenzhen Neonatal Data Collaboration Network organized 21 institutions to collect 36 cases of neonatal stroke from January 2020 to December 2022.The incidence,clinical characteristics,treatment,and prognosis of neonatal stroke in Shenzhen were analyzed.Results The incidence rate of neonatal stroke in 21 hospitals from 2020 to 2022 was 1/15 137,1/6 060,and 1/7 704,respectively.Ischemic stroke accounted for 75%(27/36);boys accounted for 64%(23/36).Among the 36 neonates,31(86%)had disease onset within 3 days after birth,and 19(53%)had convulsion as the initial presentation.Cerebral MRI showed that 22 neonates(61%)had left cerebral infarction and 13(36%)had basal ganglia infarction.Magnetic resonance angiography was performed for 12 neonates,among whom 9(75%)had involvement of the middle cerebral artery.Electroencephalography was performed for 29 neonates,with sharp waves in 21 neonates(72%)and seizures in 10 neonates(34%).Symptomatic/supportive treatment varied across different hospitals.Neonatal Behavioral Neurological Assessment was performed for 12 neonates(33%,12/36),with a mean score of(32±4)points.The prognosis of 27 neonates was followed up to around 12 months of age,with 44%(12/27)of the neonates having a good prognosis.Conclusions Ischemic stroke is the main type of neonatal stroke,often with convulsions as the initial presentation,involvement of the middle cerebral artery,sharp waves on electroencephalography,and a relatively low neurodevelopment score.Symptomatic/supportive treatment is the main treatment method,and some neonates tend to have a poor prognosis.
7.Changing resistance profiles of Enterobacter isolates in hospitals across China:results from the CHINET Antimicrobial Resistance Surveillance Program,2015-2021
Shaozhen YAN ; Ziyong SUN ; Zhongju CHEN ; Yang YANG ; Fupin HU ; Demei ZHU ; Yi XIE ; Mei KANG ; Fengbo ZHANG ; Ping JI ; Zhidong HU ; Jin LI ; Sufang GUO ; Han SHEN ; Wanqing ZHOU ; Yingchun XU ; Xiaojiang ZHANG ; Xuesong XU ; Chao YAN ; Chuanqing WANG ; Pan FU ; Wei JIA ; Gang LI ; Yuanhong XU ; Ying HUANG ; Dawen GUO ; Jinying ZHAO ; Wen'en LIU ; Yanming LI ; Hua YU ; Xiangning HUANG ; Bin SHAN ; Yan DU ; Shanmei WANG ; Yafei CHU ; Yuxing NI ; Jingyong SUN ; Yunsong YU ; Jie LIN ; Chao ZHUO ; Danhong SU ; Lianhua WEI ; Fengmei ZOU ; Yan JIN ; Chunhong SHAO ; Jihong LI ; Lixia ZHANG ; Juan MA ; Yunzhuo CHU ; Sufei TIAN ; Jinju DUAN ; Jianbang KANG ; Ruizhong WANG ; Hua FANG ; Fangfang HU ; Yunjian HU ; Xiaoman AI ; Fang DONG ; Zhiyong LÜ ; Hong ZHANG ; Chun WANG ; Yong ZHAO ; Ping GONG ; Lei ZHU ; Jinhua MENG ; Xiaobo MA ; Yanping ZHENG ; Jinsong WU ; Yuemei LU ; Ruyi GUO ; Yan ZHU ; Kaizhen WEN ; Yirong ZHANG ; Chunlei YUE ; Jiangshan LIU ; Wenhui HUANG ; Shunhong XUE ; Xuefei HU ; Hongqin GU ; Jiao FENG ; Shuping ZHOU ; Yan ZHOU ; Yunsheng CHEN ; Qing MENG ; Bixia YU ; Jilu SHEN ; Rui DOU ; Shifu WANG ; Wen HE ; Longfeng LIAO ; Lin JIANG
Chinese Journal of Infection and Chemotherapy 2024;24(3):309-317
Objective To examine the changing antimicrobial resistance profile of Enterobacter spp.isolates in 53 hospitals across China from 2015 t0 2021.Methods The clinical isolates of Enterobacter spp.were collected from 53 hospitals across China during 2015-2021 and tested for antimicrobial susceptibility using Kirby-Bauer method or automated testing systems according to the CHINET unified protocol.The results were interpreted according to the breakpoints issued by the Clinical & Laboratory Standards Institute(CLSI)in 2021(M100 31st edition)and analyzed with WHONET 5.6 software.Results A total of 37 966 Enterobacter strains were isolated from 2015 to 2021.The proportion of Enterobacter isolates among all clinical isolates showed a fluctuating trend over the 7-year period,overall 2.5%in all clinical isolates amd 5.7%in Enterobacterale strains.The most frequently isolated Enterobacter species was Enterobacter cloacae,accounting for 93.7%(35 571/37 966).The strains were mainly isolated from respiratory specimens(44.4±4.6)%,followed by secretions/pus(16.4±2.3)%and urine(16.0±0.9)%.The strains from respiratory samples decreased slightly,while those from sterile body fluids increased over the 7-year period.The Enterobacter strains were mainly isolated from inpatients(92.9%),and only(7.1±0.8)%of the strains were isolated from outpatients and emergency patients.The patients in surgical wards contributed the highest number of isolates(24.4±2.9)%compared to the inpatients in any other departement.Overall,≤ 7.9%of the E.cloacae strains were resistant to amikacin,tigecycline,polymyxin B,imipenem or meropenem,while ≤5.6%of the Enterobacter asburiae strains were resistant to these antimicrobial agents.E.asburiae showed higher resistance rate to polymyxin B than E.cloacae(19.7%vs 3.9%).Overall,≤8.1%of the Enterobacter gergoviae strains were resistant to tigecycline,amikacin,meropenem,or imipenem,while 10.5%of these strains were resistant to polycolistin B.The overall prevalence of carbapenem-resistant Enterobacter was 10.0%over the 7-year period,but showing an upward trend.The resistance profiles of Enterobacter isolates varied with the department from which they were isolated and whether the patient is an adult or a child.The prevalence of carbapenem-resistant E.cloacae was the highest in the E.cloacae isolates from ICU patients.Conclusions The results of the CHINET Antimicrobial Resistance Surveillance Program indicate that the proportion of Enterobacter strains in all clinical isolates fluctuates slightly over the 7-year period from 2015 to 2021.The Enterobacter strains showed increasing resistance to multiple antimicrobial drugs,especially carbapenems over the 7-year period.
8.A cohort study of ten-year cardiovascular disease risk among subtypes of pre-diabetes population aged 40 and above in Guiyang urban area
Yi CHEN ; Nianchun PENG ; Miao ZHANG ; Ying HU ; Rui WANG ; Juan HE ; Qiao ZHANG ; Lixin SHI
Chinese Journal of Endocrinology and Metabolism 2024;40(5):373-379
Objective:To investigate the 10-years risk for cardiovascular diseases(CVD) among different subtypes of pre-diabetes(Pre-DM) residents aged 40 and above in Guiyang urban area and to analyze the influencing factors.Methods:A total of 5 798 residents who participated in the " Risk Evaluation of cAncers in Chinese diabe Tic Individuals: a lONgitudinal(REACTION) Study" were selected to undergo oral glucose tolerance test and glycated hemoglobin test. According to the Pre-DM diagnostic criteria, normal glucose tolerance(NGT), impaired fasting glucose(IFG), impaired glucose tolerance(IGT), and diabetes mellitus were defined based on glycated hemoglobin(IA1C), and were combined into four groups: NGT group, single subtype group(IFG, IGT, IA1C), two-subtype combination group(IFG+ IGT, IFG+ IA1C, IGT+ IA1C), and three-subtype combination group(IFG+ IGT+ IA1C). Ten-year cardiovascular disease occurrence was investigated. The logistic regression model was used to analyze the risk of CVD occurrence in different subtypes of Pre-DM residents. Results:(1)The incidence in the single subtype group, two subtypes group and three subtypes group of CVD was 6.6%(182/2 752), 8.4%(135/1 613) and 9.6%(53/551) , respectively, all higher than NGT group at 5.2%(46/882). (2) Regardless of diagnosed by fasting blood glucose, 2 h blood glucose, or glycated hemoglobin, the 10-year CVD incidence rates(8.7%, 8.6%, 7.6%) in Pre-DM were higher than that in the NGT group(5.2%; all P<0.05). (3)After multivariate adjustment, compared with the NGT group, the 10-year CVD risk gradually increased in the single subtype group, two-subtype group, and three-subtype group, with OR of 1.03(95% CI 0.74-1.45), 1.08(95% CI 0.75-1.54), and 1.16(95% CI 0.75-1.78), respectively. Conclusion:The Pre-DM population has a higher 10-year risk for CVD, and the risk increases gradually with the accumulation of subtypes. Therefore the prevention and treatment of CVD should focus on the management of the Pre-DM population.
9. Effects of DNMT3A on mouse cardiac fibroblast proliferation and migration under high glucose environment
He SUN ; Bin TU ; Kai SONG ; Yang ZHOU ; Ji-Ming SHA ; Sheng-Song XU ; Hui TAO ; Rui LI ; Ye ZHANG ; Hui TAO ; Juan WANG ; Feng SUN
Chinese Pharmacological Bulletin 2023;39(3):555-560
Aim To investigate the effect of DNA methyltransferase 3A (DNMT3A) on the proliferation and migration of cardiac fibroblasts (CFs) in C57 mice under high glucose environment. Methods The hearts of C57 mice were taken from 1 to 3 days. After cutting and digesting, CFs were extracted by differential adherance centrifugattion and observed under microscope. After cell attachment, the cells were cultured under low glucose (5.5 mmol • L
10.Research on the clustered regularly interspaced short palindromic repeats genotyping of Yersinia pestis in the natural plague foci of Hainan Tibetan Autonomous Prefecture, Qinghai
LI Sheng ; HE Jian ; JIN Juan ; XIN You-quan ; YANG Xiao-yan ; ZHANG Qi ; BAI Ji-xiang ; LI Guang-hui ; DAI Rui-xia ; LI Wei
China Tropical Medicine 2023;23(3):300-
Abstract: Objective To investigate the clustered regularly interspaced short palindromic repeats (CRISPR) genotypes and regional distribution of Yersinia pestis strains in the natural plague foci of Hainan Tibetan Autonomous Prefecture of Qinghai Province (referred to as "Hainan prefecture") and provide a scientific basis for plague prevention and control in this area. Methods A total of 36 representative Yersinia pestis strains, which were isolated from different host animals and insect vectors from 1954 to 2009 in Hainan Prefecture, were selected as experimental subjects. The DNAs were extracted using the traditional sodium dodecyl sulfate decomposition and phenol-chloroform method. Three pairs of CRISPR primers (YPa, Ypb, YPc) were used for PCR amplification, sequencing and analysis of the DNA of the tested strains, respectively, as a means to identify the CRISPR genotypes of Yersinia pestis in Hainan Prefecture. Results A total of 17 spacers were observed among 36 strains of Yersinia pestis, including 9 of YPa, 5 of YPb and 3 of YPc. All strains were divided into 5 CRISPR gene clusters (Cb2, Cb4 ', Ca7, Ca7 ', Ca35 ') and 6 genotypes (G1, G9, G22, G22-A1 ', G26-A1 ', G26-A1 'A4 -). The G26-a1 ' was the main genotype, which was distributed in Gonghe, Guide and Xinghai County, and the G22 is the second type, which was distributed in Gonghe and Guide County. Conclusions The genetic polymorphism of CRISPR loci of Yersinia pestis strains in Hainan was high, and the regional distribution characteristics of Yersinia pestis strains with different genotypes were significant.

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