Javier Ganz,1,2,3,8,9 Lovelace J. Luquette,4,8 Sara Bizzotto,1,2,3,5,8 Michael B. Miller,1,3,6 Zinan Zhou,1,2,3 Craig L. Bohrson,4
Hu Jin,4 Antuan V. Tran,4 Vinayak V. Viswanadham,4 Gannon McDonough,6 Katherine Brown,6 Yasmine Chahine,1
Brian Chhouk,1 Alon Galor,4 Peter J. Park,4,7,* and Christopher A. Walsh1,2,3,10,*
1 Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Department of Pediatrics, and Howard Hughes Medical Institute, Boston Childrens Hospital, Boston, MA 02115, USA
2 Departments of Pediatrics and Neurology, Harvard Medical School, Boston, MA 02115, USA
3 Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
4 Department of Biomedical Informatics, Harvard Medical School, Boston, MA 02115, USA
5 Sorbonne Universite´ , Institut du Cerveau (Paris Brain Institute) ICM, Inserm, CNRS, Hoˆ pital de la Pitie´ Salpeˆ trie`re, 75013 Paris, France
6 Department of Pathology, Brigham and Womens Hospital, Harvard Medical School, Boston, MA 02115, USA
7 Division of Genetics, Brigham and Womens Hospital, Boston, MA 02115, USA
8 These authors contributed equally
9 Present address: Merck Research Laboratories, Cambridge, MA 02142, USA
10 Lead contact
*Correspondence: 该Email地址已收到反垃圾邮件插件保护。要显示它您需要在浏览器中启用JavaScript。 (P.J.P.), 该Email地址已收到反垃圾邮件插件保护。要显示它您需要在浏览器中启用JavaScript。 (C.A.W.)
https://doi.org/10.1016/j.cell.2024.02.025
SUMMARY
Characterizing somatic mutations in the brain is important for disentangling the complex mechanisms of aging, yet little is known about mutational patterns in different brain cell types. Here, we performed wholegenome sequencing (WGS) of 86 single oligodendrocytes, 20 mixed glia, and 56 single neurons from neurotypical individuals spanning 0.4–104 years of age and identified >92,000 somatic single-nucleotide variants (sSNVs) and small insertions/deletions (indels). Although both cell types accumulate somatic mutations linearly with age, oligodendrocytes accumulated sSNVs 81% faster than neurons and indels 28% slower than neurons. Correlation of mutations with single-nucleus RNA profiles and chromatin accessibility from the same brains revealed that oligodendrocyte mutations are enriched in inactive genomic regions and are distributed across the genome similarly to mutations in brain cancers. In contrast, neuronal mutations are enriched in open, transcriptionally active chromatin. These stark differences suggest an assortment of active mutagenic processes in oligodendrocytes and neurons.
an Yang1 Xinyuan Zhang2 Hua Wang1 Miao Guo1 Jinlong Zhang1 Xuejiao Feng3 Jiayi Yu3 Jiahui Yang3 Jinjin Zhu4 Yiyu Wang3
1 Research & Development Center, Mageline Biology Tech Co., Ltd, Wuhan, Hubei, China
2 Shanghai Skinshield Clinical Testing and Technological Research Ltd., Shanghai, China
3 Department of Dermatology, Air Force Medical Center, PLA, Beijing, China
4 Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, China
Correspondence
Jinjin Zhu, Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, 430022, China.
Email: 该Email地址已收到反垃圾邮件插件保护。要显示它您需要在浏览器中启用JavaScript。
Yiyu Wang, Department of Dermatology, Air Force Medical Center, PLA, Beijing, China.
Abstract
Background: The delicate periorbital region is susceptible to skin dehydration, wrinkles, and loss of elasticity. Thus, targeted and effective anti-aging interventions are necessary for the periorbital area.
Aim: To evaluate the efficacy and safety of a new anti-aging eye cream formulated with the active complex (Yeast/rice fermentation filtrate, N-acetylneuraminic acid, palmityl tripeptide-1, and palmitoyl tetrapeptide-7).
Methods: The cell viability and expressions of key extracellular matrix (ECM) components of the active complex were evaluated using a human skin fibroblast model. In the 12-week clinical trial, skin hydration, elasticity, facial photographs, and collagen density following eye cream application were assessed using Corneometer, Cutometer, VISIA, and ultrasound device, respectively. Dermatologists and participants evaluated clinical efficacy and safety at baseline, and after 4, 8, and 12 weeks.
Results: PCR and immunofluorescent analyses revealed that the active complex significantly stimulated fibroblast proliferation (p < 0.05) and markedly promote the synthesis of collagen and elastin. Clinical findings exhibited a substantial enhancement in skin hydration (28.12%), elasticity (18.81%), and collagen production (54.99%) following 12 weeks of eye cream application. Dermatological evaluations and participants’ assessments reported a significant improvement in skin moisture, roughness, elasticity, as well as fine lines and wrinkles by week 8.
Conclusion: The new anti-aging eye cream, enriched with the active complex, demonstrates comprehensive rejuvenating effects, effectively addressing aging concerns in the periorbital area, coupled with a high safety profile.
KEYWORDS
anti-aging, collagen, elastin, extracellular matrix, eye cream, wrinkle
原创： 十六点五 中山二院糖尿病足中心
在上节中提到局部鉴别皮肤组织的“死活”是一个难题，有读者问有关在创面表面用“亚甲基蓝”染料染色来鉴别的问题，这种方法是一种比较古老的方法，对于相对较干净的伤口的效果比较好，对于严重感染的伤口容易出现误报，而且为了最大程度的保护足的结构和功能，一般采取蚕食性的方法进行清创，用这些染料染色后，反而有时候会干扰对肉芽组织生长的判断，容易造成清创过多的情况，因此，目前应用较少（也比较难得到有证书能够在临床应用的这种染料）。
针对“杨氏扩散”的特殊性、沿着窦道扩散的缺点及足部手术的原则，我们设计了一种沿着窦道行纵向切开的“刘氏切法”（图1），特点是：（1）沿着窦道做平行于足纵轴切开；（2）一般在窦道开口及窦道末端切开；（3）切口长度3-4CM；（4）足弓部足底边缘部的切口非常关键。
足底溃疡是糖尿病足治疗的难点。尤其是足跟。从理论上讲，足底的组织结构较足背要致密很多，其具有很强的对于损伤的防护及对于细菌感染的抵抗能力，即使在糖尿病状态下，也有一定的防御能力。
在公众号《糖尿病足局部创面的抗菌治疗（2）》中，其实涉及到糖尿病足局部治疗中一个非常重要而关键的问题，就是糖尿病足局部脓肿的切开。但是在《糖尿病足局部创面的抗菌治疗（2）》里面只讲了一些原则，发布之后，有许多读者觉得还是讲的不够透彻，尤其是没有“图解”，很难理解有关的问题，因此，继续补充一些有“图解”的文章，希望能够把有关的问题讲得更加透彻。
伤口世界平台生态圈，以“关爱人间所有伤口患者”为愿景，连接、整合和拓展线上和线下的管理慢性伤口的资源，倡导远程、就近和居家管理慢性伤口，解决伤口专家的碎片化时间的价值创造、诊疗经验的裂变复制、和患者的就近、居家和低成本管理慢性伤口的问题。
2019广东省医疗行业协会伤口管理分会年会
扫一扫了解详情:
任何关于疾病的建议都不能替代执业医师的面对面诊断。所有门诊时间仅供参考，最终以医院当日公布为准。
网友、医生言论仅代表其个人观点，不代表本站同意其说法，请谨慎参阅，本站不承担由此引起的法律责任。
