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Tracking SARS-CoV-2 Omicron diverse spike gene mutations identifies multiple inter-variant recombination events

Signal Transduction and Targeted Therapy 2022年第5期7卷 1808-1816页

作者： Junxian Ou Wendong Lan Xiaowei Wu Tie Zhao Biyan Duan Peipei Yang Yi Ren Lulu Quan Wei Zhao Donald Seto james chodosh Zhen Luo Jianguo Wu Qiwei Zhang Guangdong Provincial Key Laboratory of Virology Institute of Medical MicrobiologyJinan University510632 GuangzhouChina BSL-3 Laboratory(Guangdong) Guangdong Provincial Key Laboratory of Tropical Disease ResearchSchool of Public HealthSouthern Medical University510515 GuangzhouChina Bioinformatics and Computational Biology Program School of Systems BiologyGeorge Mason UniversityManassasVA 20110USA Department of Ophthalmology Howe Laboratory Massachusetts Eye and EarHarvard Medical SchoolBostonMA 02114USA Foshan Institute of Medical Microbiology 528315 FoshanChina

The current pandemic of COVID-19 is fueled by more infectious emergent Omicron variants.Ongoing concerns of emergent variants include possible recombinants,as genome recombination is an important evolutionary mechanism for the emergence and re-emergence of human viral pathogens.In this study,we identified diverse recombination events between two Omicron major subvariants(BA.1 and BA.2)and other variants of concern(VOCs)and variants of interest(VOIs),suggesting that co-infection and subsequent genome recombination play important roles in the ongoing evolution of SARS-CoV-2.Through scanning high-quality completed Omicron spike gene sequences.

关键词： subsequent diverse recombination

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波士顿人工角膜临床应用及其进展

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中华眼科杂志 2014年第4期50卷 307-312页

作者：王丽强黄一飞 james chodosh Claes H.Dohlman 解放军总医院眼科北京100853 Massachusetts Eye and Ear Infirmary Harvard Medical School

波士顿人工角膜是全世界应用范围最广,最成功的人工角膜之一,它适用于严重角膜疾病和多次角膜移植失败的病例.它的长期预后因病种不同而不同,自身免疫性疾病,如瘢痕性类天疱疮和Stevens-Johnson综合征、中毒性表皮坏死溶解症,以及严重... 详细信息

波士顿人工角膜是全世界应用范围最广,最成功的人工角膜之一,它适用于严重角膜疾病和多次角膜移植失败的病例.它的长期预后因病种不同而不同,自身免疫性疾病,如瘢痕性类天疱疮和Stevens-Johnson综合征、中毒性表皮坏死溶解症,以及严重化学烧伤等疾病的预后较非感染性角膜病的预后差.在适应证的扩展方面,儿童遗传性角膜混浊病早期植入人工角膜可以有效地减少弱视的发生.波士顿人工角膜采用“领扣”式设计,使用聚甲基丙烯酸甲酯的生物材料.波士顿人工角膜使用供体角膜,也可使用患者自体角膜作为载体.针对我国角膜供体材料匮乏的特点,采用自体角膜为载体为角膜盲患者复明提供了一种选择.波士顿人工角膜经过多次改进,减少了严重并发症的发生,其中包括后盘的多孔设计,使角膜植片能够从房水中获得充足的营养,减少了角膜溶解的发生率,持续性佩戴角膜接触镜有效地防止了眼表水分的蒸发,有效地减少角膜组织的坏死和溶解,人工角膜的在位率明显提高.术后预防性地使用抗生素有效地预防了感染的发生,从而降低了眼内炎的发生率.

关键词：角膜疾病假体和植入物假体设计甲基丙烯酸甲酯类接触镜,亲水性角膜移植治疗失败

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Tuning gelatin-based hydrogel towards bioadhesive ocular tissue engineering applications

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Bioactive Materials 2021年第11期6卷 3947-3961页

作者： Sina Sharifi Mohammad Mirazul Islam Hannah Sharifi Rakibul Islam Darrell Koza Felisa Reyes-Ortega David Alba-Molina Per H.Nilsson Claes H.Dohlman Tom Eirik Mollnes james chodosh Miguel Gonzalez-Andrades Massachusetts Eye and Ear and Schepens Eye Research Institute Department of OphthalmologyHarvard Medical SchoolBostonMAUSA Department of Immunology Oslo University HospitalRikshospitaletUniversity of OsloOsloNorway Department of Physical Sciences Eastern Connecticut State UniversityWillimanticCTUSA Linnaeus Center for Biomaterials Chemistry Linnaeus UniversityKalmarSweden Research Laboratory Nordland HospitalBodøNorway Centre of Molecular Inflammation Research Norwegian University of Science and TechnologyTrondheimNorway Maimonides Biomedical Research Institute of Cordoba(IMIBIC) Department of OphthalmologyReina Sofia University Hospital and University of CordobaCordobaSpain Faculty of Health Sciences K.G.Jebsen TRECUniversity of TromsøNorway

Gelatin based adhesives have been used in the last decades in different biomedical applications due to the excellent biocompatibility,easy processability,transparency,non-toxicity,and reasonable mechanical properties to mimic the extracellular matrix(ECM).Gelatin adhesives can be easily tuned to gain different viscoelastic and mechanical properties that facilitate its ocular application.We herein grafted glycidyl methacrylate on the gelatin backbone with a simple chemical modification of the precursor,utilizing epoxide ring-opening reactions and visible light-crosslinking.This chemical modification allows the obtaining of an elastic protein-based hydrogel(GELGYM)with excellent biomimetic properties,approaching those of the native tissue.GELGYM can be modulated to be stretched up to 4 times its initial length and withstand high tensile stresses up to 1.95 MPa with compressive strains as high as 80%compared to Gelatin-methacryloyl(GeIMA),the most studied derivative of gelatin used as a bioadhesive.GELGYM is also highly biocompatible and supports cellular adhesion,proliferation,and migration in both 2 and 3-dimensional cell-cultures.These characteristics along with its super adhesion to biological tissues such as cornea,aorta,heart,muscle,kidney,liver,and spleen suggest widespread applications of this hydrogel in many biomedical areas such as transplantation,tissue adhesive,wound dressing,bioprinting,and drug and cell delivery.

关键词： Natural-based hydrogel Gelatin Biocompatible Biomimetic Bioadhesive Cornea

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