ABSTRACT
ObjectiveTo investigate the current status and high-risk factors of chromosomal aberrations in peripheral blood lymphocytes （PBL） of radiation workers in Hainan Province. MethodsA total of 200 radiological workers who underwent occupational health examination in Hainan Provincial Hospital of Traditional Chinese Medicine from January 2021 to December 2021 were selected to collect the occupational health examination data and the rate of PBL chromosomal aberrations. The influencing factors of PBL chromosomal aberrations were analyzed by logistic regression model. The predictive value of logistic regression prediction model on PBL chromosomal aberrations were determined by using the reciver operator characteristic （ROC） curve. ResultsA total of 20 000 cells （100 cells/person） were tested. The chromosomal aberration rate was 0.37% （74/20 000） and the PBL chromosomal aberration rate in the subjects was 6.00% （12/200）. Univariate analysis showed that PBL chromosomal aberrations in radiological workers were related to age， length of service， type of work and education （all P<0.05）， but not to gender （P>0.05）. The logistic regression prediction model was constructed based on the influencing factors， with χ2=9.413， df=9， P=0.852， suggesting a good model fit. The logistic regression prediction model predicted the area under the curve （AUC） for the occurrence of PBL chromosomal aberrations in radiation workers was 0.914 （95%CI： 0.866‒0.949）， with a cut-off value of 3.05， corresponding to a prediction sensitivity and specificity of 100.00% and 75.98%， respectively. ConclusionThe incidence of PBL chromosomal aberrations in radiological workers in Hainan Province was 6.00%， with age， working age and job type as high-risk factors and education level as a protective factor. The prediction model constructed by the above factors can provide a reliable basis for clinical prediction of PBL chromosomal aberrations in radiological workers.
ABSTRACT
Objective To observe the effect of intermedin(IMD) on microvascular injury of renal fibrosis in unilateral ureteral obstruction (UUO) rat model.Methods Seventy-two male Wistar rats were randomly divided into two groups:the sham-operation group (n=24) underwent the left ureteral dissection,the other 48 rats were made as unilateral ureteral obstruction models and subdivided into model group(UUO,n=24) and IMD group (n=24).At the 7,14,21,28 day after the operation,6 randomly-selected rats from each of the three groups respectively were blooded by abdominal arotic and their obstructive kidneys were taken out.The renal histopathological changes were observed through HE and Masson staining,the contents of BUN,Scr and cystatin C (CysC) of the obstructive kidneys were determined,the expressions of transforming growth factor-β1 (TGF-β1),α-SMA,bone morphogenetic protein-7 (BMP-7),E-cadherin,thrombospondin 1 (TSP-1) and vascular endothelial growth factor (VEGF) were detected by RT-PCR and immunohistochemistry.Results Compared with the sham-operated group,the pathological changes of kidney in the model group showed that the degree of fibrosis was obvious,tubular interstitial damage aggravated,the levels of BUN,Scr,CysC in the model group increased (P ＜ 0.05),the mRNA expression and protein content of TGF-β1,oα-SMA,TSP-1 increased (P ＜ 0.05),while the levels of BMP-7,E-cadherin and VEGF decreased (P ＜0.05).Compared with the UUO group,renal tubular damage,interstitial fibrosis in the IMD group were lighter,the levels of BUN,Scr,CysC in the IMD group were lower (P ＜ 0.05),the mRNA expression and protein content of TGF-β1,α-SMA,TSP-1 were down-regulated (P ＜ 0.05),while the levels of BMP-7,E-cadherin and VEGF were up-regulated (P ＜ 0.05).Conclusion IMD can ameliorate the renal interstitial fibrosis,and the mechanism may be related to the fact that VEGF mediated by IMD can reduce vascular injury.