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| 1 | Semen parameters in men recovered from COVID-19显示文摘The novel coronavirus disease(COVID-19)pandemic is emerging as a global health threat and shows a higher risk for men than women.Thus far,the studies on andrological consequences of COVID-19 are limited.To ascertain the consequences of COVID-19 on sperm parameters after recovery,we recruited 41 reproductive-aged male patients who had recovered from COVID-19,and analyzed their semen parameters and serum sex hormones at a median time of 56 days after hospital discharge.For longitudinal analysis,a second sampling was obtained from 22 of the 41 patients after a median time interval of 29 days from first sampling.Compared with controls who had not suffered from COVID-19,the total sperm count,sperm concentration,and percentages of motile and progressively motile spermatozoa in the patients were significantly lower at first sampling,while sperm vitality and morphology were not affected.The total sperm count,sperm concentration,and number of motile spermatozoa per ejaculate were significantly increased and the percentage of morphologically abnormal sperm was reduced at the second sampling compared with those at first in the 22 patients examined.Though there were higher prolactin and lower progesterone levels in patients at first sampling than those in controls,no significant alterations were detected for any sex hormones examined over time following COVID-19 recovery in the 22 patients.Although it should be interpreted carefully,these findings indicate an adverse but potentially reversible consequence of COVID-19 on sperm quality. | Tong-Hang Guo Mei-Ying Sang Shun Bai Hui Ma Yang-Yang Wan Xiao-Hua Jiang Yuan-Wei Zhang Bo Xu Hong Chen Xue-Ying Zheng Si-Hui Luo Xue-Feng Xie Chen-Jia Gong Jian-Ping Weng Qing-Hua Shi | 2021 | Asian Journal of Andrology2021，23，5： | 2 |
| 2 | The zinc finger transcription factor,KLF2,protects against COVID-19 associated endothelial dysfunction显示文摘Coronavirus disease 2019(COVID-19)is regarded as an endothelial disease(endothelialitis)with its patho-mechanism being incompletely understood.Emerging evidence has demonstrated that endothelial dysfunction precipitates COVID-19 and its accompanying multi-organ injuries.Thus,pharmacotherapies targeting endothelial dysfunction have potential to ameliorate COVID-19 and its cardiovascular complications.The objective of the present study is to evaluate whether kruppel-like factor 2(KLF2),a master regulator of vascular homeostasis,represents a therapeutic target for C0VID-19-induced endothelial dysfunction.Here,we demonstrate that the expression of KLF2 was reduced and monocyte adhesion was increased in endothelial cells treated with COVID-19 patient serum due to elevated levels of pro-adhesive molecules,ICAM1 and VCAM1.IL-1β and TNF-α;two cytokines elevated in cytokine release syndrome in COVID-19 patients,decreased KLF2 gene expression.Pharmacologic(atorvastatin and tannic acid)and genetic(adenoviral overexpression)approaches to augment KLF2 levels attenuated COVID-19-serum-induced increase in endothelial inflammation and monocyte adhesion.Next-generation RNA-sequencing data showed that atorvastatin treatment leads to a cardiovascular protective transcriptome associated with improved endothelial function(vasodilation,antiinflammation,antioxidant status,anti-thrombosis/-coagulation,anti-fibrosis,and reduced angiogenesis).Finally,knockdown of KLF2 partially reversed the ameliorative effect of atorvastatin on COVID-19-serum-induced endothelial inflammation and monocyte adhesion.Collectively,the present study implicates loss of KLF2 as an important molecular event in the development of COVID-19-induced vascular disease and suggests that efforts to augment KLF2 levels may be therapeutically beneficial. | Suowen Xu Yujie Liu Yu Ding Sihui Luo Xueying Zheng Xiumei Wu Zhenghong Liu Iqra Ilyas Suyu Chen Shuxin Han Peter J.Little Mukesh K.Jain Jianping Weng | 2021 | Signal Transduction and Targeted Therapy2021，6，8： | 1 |
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