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Ruhangiz T. Kilani ; Larry Guilbert ; Xiaoyue Lin ; Aziz Ghahary 《Wound repair and regeneration》2007,15(2):236-244
Overexpression of wound healing-promoting factors such as transforming growth factor-1 (TGF-beta1) and insulin-like growth factor-1 (IGF-1) during the healing process has been implicated in the development of dermal fibrosis in patients following thermal injury, surgical incision, and deep trauma. However, the mechanism through which the expression of these two fibrogenic factors is slowed down and/or abrogated in the late stages of the healing process is not known. Here, we hypothesize that keratinocyte-releasable factors counteract the fibrogenic role of both IGF-1 and TGF-beta1 in fibroblasts. To test this hypothesis, the levels of collagenase (MMP-1), as an index for extracellular matrix degradation, in dermal fibroblasts in response to either keratinocyte-conditioned medium (KCM) or our recently identified keratinocyte-releasable stratifin in the presence and absence of either IGF-1, TGF-beta1, or both were evaluated. The results of Northern analysis showed a significant increase in collagenase mRNA expression in cells treated with KCM in the presence of both IGF-1 and TGF-beta1. The effect was, at least in part, due to keratinocyte-derived stratifin that was present in KCM. This was ascertained as the levels of MMP-1 mRNA were markedly reduced when cells were treated with stratifin-immuno-depleted KCM. The results of Western blot analysis showed an increase in the level of MMP-1 protein in stratifin-treated fibroblasts and this was consistent with the level of MMP-1 mRNA expression detected by Northern analysis. However, in contrast to KCM, whose efficacy on MMP-1 expression was modestly reduced by either IGF-1 and TGF-beta1, or a combination of both, these factors abrogated the MMP-1 stimulatory effect of stratifin in fibroblasts. In summary, the results of this study revealed that both stratifin and KCM stimulate the expression of MMP-1-in fibroblasts and this effect can be abrogated by either IGF-1, TGF-beta1, or a combination of both. 相似文献
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师范大学学生艾滋病知识现况调查及健康教育近期效果评价 总被引:4,自引:0,他引:4
目的 了解师范大学学生艾滋病相关知识及行为现状,为高校制定艾滋病健康教育规划提供参考。方法 抽取天津师范大学2000年入学新生,通过集体讲座,使用统一的调查问卷在教育前后分别调查学生艾滋病相关知识及态度,并利用EPIinf0软件进行分析。结果 天津师范大学一年级学生健康教育后对艾滋病性质、主要传播途径等的正确回答率都有所提高,能够正确对待艾滋病病毒感染者,教育前后学生对性行为的态度无明显改变。学生希望获得艾滋病知识的前4位方式均为电视、报刊书籍、卫生课和医生。结论 从国情和现实需要出发,在大学生中开展适时、适度、适量的性健康教育和健康行为教育,对预防性病艾滋病有着积极的意义。 相似文献
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Xiaoyue Xu Zumin Shi Gang Liu Dennis Chang Sally C. Inglis John J. Hall Aletta E. Schutte Julie E. Byles Deborah Parker 《Nutrients》2021,13(3)
It is unknown whether a healthy diet or unhealthy diet combined with specific supplements may jointly contribute to incidence of obesity and cardiovascular disease (CVD). We included 69,990 participants from the 45 and Up Study who completed both baseline (2006–2009) and follow-up (2012–2015) surveys. We found that compared to participants with a long-term healthy diet and no supplement consumption, those with a long-term healthy diet combined with multivitamins and minerals (MVM) or fish oil consumption were associated with a lower incidence of CVD (p < 0.001); whilst those with an unhealthy diet and no MVM or fish oil consumption were associated with a higher risk of obesity (p < 0.05). Compared to participants with a long-term healthy diet and no calcium consumption, the combination of a long-term healthy diet and calcium consumption was linked to a lower risk of CVD (IRR = 0.87, 95% CI: 0.78; 0.96). In conclusion, a long-term healthy diet combined with MVM or fish oil was associated with a lower incidence of CVD. Participants who maintained a healthy diet and used calcium supplements were associated with a lower incidence of obesity. However, these associations were not found among those with an unhealthy diet, despite taking similar supplements. 相似文献
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Zou Zhaohui Bhandari Junu Xiao Baiyan Liang Xiaoyue Zhang Yu Yan Guohui 《Lasers in medical science》2021,36(5):1059-1066
Lasers in Medical Science - The purpose of this study was to evaluate the effect of diode laser irradiation on Enterococcus faecalis (E. faecalis) and its lipoteichoic acid (LTA). Ninety-six... 相似文献
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继续医学教育作为一项提高我国医疗卫生队伍整体素质的重要措施,已逐步被广大医务人员所接受。继续医学教育是以学习现代医学科学技术发展的新理论、新知识、新技术、新方法为重点,注重先进性、针对性和实用性。同时坚持教育方式多样化,注重普及与提高相结合的特点,是学历教育后为医疗技术人员补充知识的一种较好的途径。但在执行继续教育中还存在一定的问题,影响了执行继续教育项目的质量,笔者将其归纳整理.与大家共同探讨解决的办法。 相似文献
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陈晓越 《南华大学学报(医学版)》2018,(5):491-494
本研究旨在探讨多西他赛联合卡铂(TP)与多西他赛联合多柔比星与环磷酰胺(TAC)两种新辅助化疗对可手术三阴性乳腺癌的临床疗效以及BRCA1基因表达差异的疗效对比并进行探讨,选取62例三阴性乳腺癌患者作为研究对象,采用回顾性分析的方法,把入选病例分为TP组与TAC组,其中TP组患者采取多西他赛联合卡铂进行治疗,TAC组患者接受多西他赛联合多柔比星与环磷酰胺进行治疗,对两组患者的临床疗效以及与BRCA1基因阴性表达患者的总生存期与无进展生存时间关系进行对比分析。结果表明TP组近期临床疗效显著好于TAC组,同时TP组毒副作用较轻且两组之间具有显著性差异(P<0.05);BRCA1表达为阴性的患者接受TP化疗生存期以及生存质量显著提高,因此本研究认为多西他赛联合卡铂化疗对三阴性乳腺癌的临床疗效较好且无严重不良反应,同时BRCA1阴性的患者效果显著好于阳性患者,值得临床推广. 相似文献
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