ORF8 protein of SARS‐CoV‐2 reduces male fertility in mice

alexandrossfakianakis shared this article with you from Inoreader ORF8 protein of SARS‐CoV‐2 reduces male fertility in mice via Journal of Medical Virology Abstract As one of the most rapidly evolving proteins of the genus Betacoronavirus, ORF8's function and potential pathological consequence in vivo are still obscure. In this study, we show that the secretion of ORF8 is dependent on its N-terminal signal peptide sequence and can be inhibited by ROS scavenger and ER-Golgi transportation inhibitor in cultured cells. To trace the effect of its possible in vivo secretion，we examined the plasma samples of COVID-19 convalescent patients and found that the patients aged 40 to 60 had higher antibody titers than those under 40. To explore ORF8's in vivo function, we administered the mice with ORF8 via tail-vein injection to simulate the circulating ORF8 in the patient. Although no apparent difference in body weight, food intake, and vitality was detected between vehicle- and ORF8-treated mice, the latter displayed morphological abnormalities of testes and epididymides, as indicated by the loss of the central ductal lumen accompanied by a decreased fertility in five-week-old male mice. Furthermore, the analysis of gene expression in the testes between vehicle- and ORF8-treated mice identified a decreased expression of Col1a1, the loss of which is known to be associated with mice's infertility. Although whether our observation in mice could be translated to humans remains unclear, our study provides a potential mouse model that can be used to investigate the impact of SARS-CoV-2 infection on the human reproductive system. This article is protected by copyright. All rights reserved. View on Web

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Sparing submandibular gland to alleviating acute xerostomia in patients with nasopharyngeal carcinoma treated with helical tomotherapy: Evaluation by diffusion kurtosis imaging

alexandrossfakianakis shared this article with you from Inoreader Sparing submandibular gland to alleviating acute xerostomia in patients with nasopharyngeal carcinoma treated with helical tomotherapy: Evaluation by diffusion kurtosis imaging via radiotheraphy Publication date: Available online 15 May 2022 Source: Radiotherapy and Oncology Author(s): Da-wei Zhao, Wen-jun Fan, Xue-mei Fang, Yan-rong Luo, Jian Wei, Nan-xiang Chen, Xin-xin Zhang, Gang Liu, Jin-feng Li, Xiao Zang, Meng Li, Lingling Meng, Lin Ma View on Web

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Ergonomics in Otolaryngology: A Systematic Review and Meta‐analysis

alexandrossfakianakis shared this article with you from Inoreader Ergonomics in Otolaryngology: A Systematic Review and Meta‐analysis via The Laryngoscope Ergonomic stressors among otolaryngologists contribute to a high rate of WRMD across all subspecialties with notable impact on productivity, longevity, and quality of life. The overall proportion (95% confidence intervals [CI]) of general otolaryngologists reporting WRMD was 0.79 (0.66, 0.88) for any symptoms; 0.54 (0.40, 0.67) for neck symptoms; 0.33 (0.20, 0.49) for shoulder symptoms; and 0.49 (0.40, 0.59) for back symptoms. Objectives To determine the proportion of otolaryngologists with work-related musculoskeletal discomfort (WRMD) and to review objective ergonomic data that contribute to WRMD. Study Design Systematic review and meta-analysis. Methods A comprehensive search of the literature identified 1121 articles for initial review of which 19 (3563 participants) met criteria for qualitative discussion and eight (2192 participants) met criteria for meta-analysis. Random effects meta-analyses were used to estimate the proportion of otolaryngologists reporting WRMD. Results The overall proportion (95% confidence intervals [CI]) of general otolaryngologists reporting WRMD was 0.79 (0.66, 0.88) for any symptoms; 0.54 (0.40, 0.67) for neck symptoms; 0.33 (0.20, 0.49) for shoulder symptoms; and 0.49 (0.40, 0.59) for back symptoms. Surgeons performing primarily subspecialty cases had a lower estimated overall prevalence of WRMD versus those performing general ENT cases, however the odds ratio (OR) was not statistically significant (OR [95% confidence interval] 0.53 [0.22, 1.25]). 23%–84% of otolaryngologists underwent medical treatment for WRMD. 5%–23% took time off work and 1%–6% stopped operating completely as a result of WRMD. 23%–62.5% of otolaryngologists believed WRMD negatively impacted their quality of life. Objective measures of ergonomic posture indicate moderate to severe risk of injury during the routine clinic and surgical procedures with none found to be low risk. Conclusions Ergonomic stressors among otolaryngologists contribute to a high rate of WRMD across all subspecialties with notable impact on productivity, longevity, and quality of life. Laryngoscope, 2022 View on Web

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Radiographic bone volume alteration after jaw cyst enucleation with or without simultaneous bone grafts: A prospective randomized study

alexandrossfakianakis shared this article with you from Inoreader Radiographic bone volume alteration after jaw cyst enucleation with or without simultaneous bone grafts: A prospective randomized study via Clinical Implant Dentistry and Related Research Abstract Objective This study was aimed to evaluate bone healing after jaw cyst enucleation with or without bone substitutes by cone beam computed tomography, and to analyze potential influence factors for bone formation as well. Materials and Methods Sixty seven jaw cyst patients were randomly assigned to two groups. Thirty three patients in control group accepted cystectomy without any filling material. The rest 34 bone cavities which filled with xenograft (DBBM, Bio-Oss®) and covered by absorbable membrane (Bio-Gide®) were included in the guided bone regeneration (GBR) group. All patients were examined with cone bean computerized tomography before operation, 3 and 6 months after surgery. Linear regression analysis was applied to evaluate the influence factors of bone healing. Results There was no significant difference in bone formation rate at 3 months after enucleation, with shrinkage rate (SR) of cystic lesion in control group and GBR group of 26.43 ± 14.98% and 20.78 ± 10.80%, respectively (p > 0.05). Larger shrinkage area in GBR group was detected on postoperative radiographs after 6 months with SR of 60.11 ± 19.23%, when compared to those in patients without filling (6 months SR: 48.63 ± 19.39%, p = 0.018, <0.05). Linear regression analysis showed that cyst size was negatively correlated with bone formation. Conclusion GBR with bovine xenograft and absorbable membrane showed considerable bone regeneration property in the healing of jaw cystic defects after enucleation of radicular cysts. Cyst size showed a suppressive influence on bone formation. View on Web

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