The Association of Exercise with Both Erectile and Sexual Function in Black and White Men

IntroductionThere is growing interest in using exercise to treat. Although many studies have highlighted the relationship between better erectile function and exercise, black men have been underrepresented in the literature.AimsThis study aims to determine whether or not exercise is associated with better erectile as well as sexual function in black men and define a minimum exercise threshold for which better erectile/sexual function is seen in a cross-sectional study.MethodsOur study population consisted of 295 healthy controls from a case-control study assessing risk factors for prostate cancer conducted at the Durham Veterans Affairs Medical Center, which contained a substantial proportion of black men (n = 93; 32%). Exercise and erectile/sexual function were both determined from self-reported questionnaires. Subjects were stratified into four exercise groups: <3 (sedentary), 3–8.9 (mildly active), 9–17.9 (moderately active), and ≥18 (highly active) metabolic equivalents (MET) hours/week. The association between exercise and erectile/sexual function was addressed utilizing multivariable linear regression analyses.Main Outcome MeasuresErectile/sexual function was defined by the validated Expanded Prostate Cancer Index Composite sexual assessment, which was analyzed as a continuous variable (sexual function score). Clinically significant better function was defined as half a standard deviation (SD) (16.5 points).ResultsMedian sexual function score was 53 (SD = 33). Higher exercise was associated with a better sexual function score (P < 0.001). Importantly, there was no interaction between black race and exercise (P-interaction = 0.772), meaning more exercise was linked with better erectile/sexual function regardless of race. Overall, exercise ≥18 MET hours/week predicted better erectile/sexual function (P < 0.001) with a clinically significant 17.3-point higher function. Exercise at lower levels was not statistically (P > 0.147) or clinically (≤8.14 points higher function) associated with erectile/sexual function.ConclusionsIn a racially diverse population, exercise ≥18 MET hours/week is highly associated with better erectile/sexual function regardless of race. Simon RM, Howard L, Zapata D, Frank J, Freedland SJ, and Vidal AC. The association of exercise with both erectile and sexual function in black and white men. J Sex Med 2015;12:1202–1210.     

Hypertension is a risk factor for adverse outcomes in patients with coronavirus disease 2019: a cohort study

Abstract

Background

Comorbidities are commonly seen in patients with coronavirus disease 2019 (COVID-19), but the clinical implication is not yet well-delineated. We aim to characterize the prevalence and clinical implications of comorbidities in patients with COVID-19.     

Is there evidence to recommend a “cutoff” BMI for day-case eligible orthopedic surgery?

1. Download : Download high-res image (376KB)
2. Download : Download full-size image

     

Bacteroides forsythus ATCC43037菌体蛋白与人类唾液酸性富脯蛋白的相互作用

目的：探讨福赛类杆菌与人类唾液富脯蛋白相互作用的蛋白分子。方法：Western—blot方法。将人工合成唾液富脯蛋白用生物素标记，福赛类杆菌全菌蛋白凝胶电泳，半干转移至纤维膜上，观察二者的相互作用。结果：富脯蛋白能与分子量为85KD、65KD、60KD、以及49KD的福赛类杆菌蛋白发生结合。结论：福赛类杆菌存在与人类唾液富脯蛋白相互结合的粘附素。     

透明质酸钠对大鼠成肌细胞增殖和分化的影响

目的 研究透明质酸钠对成肌细胞增殖和分化的影响。方法 采用酶消化法将新生SD大鼠骨骼肌组织分离、纯化、原代培养及传代培养；取第3代成肌细胞，分别加入浓度为0．05%、0．1％及0．2％的透明质酸钠溶液作为生长培养基行体外培养为实验A、B及C组，加入常规生长培养基为对照D组，观察各组成肌细胞增殖情况，并采用细胞计数及MTT法绘制生长曲线。另选择0．1%透明质酸钠融合培养基行体外成肌细胞培养，常规融合培养基作对照，观察透明质酸钠对成肌细胞分化功能的影响。结果A、B及C组成肌细胞增殖表现相似，2d时进入对数生长期，4d时均达顶峰；D组成肌细胞于3d时进入对数生长期，5d时细胞数倍增，6d时达顶峰。MTT法所测吸光度（A）值的变化反映成肌细胞的增殖情况，与细胞计数的结果一致，以B组细胞增殖作用最明显，B组A值在2～8d时均高于C、D组（P〈0．05），8d时高于A组（P〈0．05）。0．1％透明质酸钠融合培养基中的成肌细胞融合率较低且上升缓慢，7d时融合率最高，为11．7％；常规融合培养基成肌细胞融合率于6d时达到峰值，约为35．0%。结论 透明质酸钠与成肌细胞的细胞相容性较好，可以作为良好的成肌细胞培养基。     

种植受体血管内皮细胞在异种血管移植中的实验研究

目的　探讨种植受体血管内皮细胞在抗异种血管移植超急排斥反应 (HAR)方面的意义。方法　选用豚鼠→大鼠移植模型 ,先将分离、培养的大鼠动脉内皮细胞种植于去内皮的豚鼠动脉内壁 ,再将此豚鼠动脉植入大鼠体内 ,观察动脉血栓形成时间 ,并采用免疫组化技术检测了 Ig M、C3在移植后豚鼠动脉壁上沉积的情况。结果　已种植大鼠内皮细胞的豚鼠动脉血栓形成时间 (2 0 .3± 4.42 h)较植入大鼠体内的正常豚鼠动脉 (0 .35± 0 .2 84h)以及单纯去内皮豚鼠动脉血栓形成时间 (0 .16 5± 0 .0 77h)显著延长 (P<0 .0 0 1)。免疫组化结果显示 ,植入大鼠体内的正常豚鼠内皮细胞表面有 Ig M和 C3沉积 ,而预先种植大鼠内皮细胞的豚鼠动脉内壁无 Ig M和 C3沉积。结论　在异种供体血管壁上预先种植受者血管内皮细胞 ,可延长移植的异种供体血管通畅时间 ,该技术可能在抗异种血管移植 HAR方面具有重要意义