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非洲蝰科和眼镜蛇科蛇毒的蛋白质组学分析及其抗蛇毒血清中和作用的综述

A Review of the Proteomic Profiling of African Viperidae and Elapidae Snake Venoms and Their Antivenom Neutralisation.

机构信息

Department of Biochemistry, Faculty of Science, University of Johannesburg, Auckland Park 2006, South Africa.

South Africa Venom Suppliers CC, Louis Trichardt 0920, South Africa.

出版信息

Toxins (Basel). 2022 Oct 22;14(11):723. doi: 10.3390/toxins14110723.

Abstract

Snakebite envenoming is a neglected tropical disease (NTD) that results from the injection of snake venom of a venomous snake into animals and humans. In Africa (mainly in sub-Saharan Africa), over 100,000 envenomings and over 10,000 deaths per annum from snakebite have been reported. Difficulties in snakebite prevention and antivenom treatment are believed to result from a lack of epidemiological data and underestimated figures on snakebite envenoming-related morbidity and mortality. There are species- and genus-specific variations associated with snake venoms in Africa and across the globe. These variations contribute massively to diverse differences in venom toxicity and pathogenicity that can undermine the efficacy of adopted antivenom therapies used in the treatment of snakebite envenoming. There is a need to profile all snake venom proteins of medically important venomous snakes endemic to Africa. This is anticipated to help in the development of safer and more effective antivenoms for the treatment of snakebite envenoming within the continent. In this review, the proteomes of 34 snake venoms from the most medically important snakes in Africa, namely the Viperidae and Elipdae, were extracted from the literature. The toxin families were grouped into dominant, secondary, minor, and others based on the abundance of the protein families in the venom proteomes. The Viperidae venom proteome was dominated by snake venom metalloproteinases (SVMPs-41%), snake venom serine proteases (SVSPs-16%), and phospholipase A (PLA-17%) protein families, while three-finger toxins (3FTxs-66%) and PLAs (16%) dominated those of the Elapidae. We further review the neutralisation of these snake venoms by selected antivenoms widely used within the African continent. The profiling of African snake venom proteomes will aid in the development of effective antivenom against snakebite envenoming and, additionally, could possibly reveal therapeutic applications of snake venom proteins.

摘要

蛇伤中毒是一种被忽视的热带病(NTD),是由毒蛇毒液注入动物和人类引起的。在非洲(主要在撒哈拉以南非洲),每年有超过 10 万例蛇伤中毒和超过 1 万例死亡。人们认为,蛇伤预防和抗蛇毒血清治疗困难的原因是缺乏流行病学数据以及对蛇伤中毒相关发病率和死亡率的低估。在非洲和全球范围内,蛇毒存在与物种和属特异性相关的变化。这些变化极大地导致了毒液毒性和致病性的巨大差异,从而削弱了用于治疗蛇伤中毒的已采用的抗蛇毒血清疗法的疗效。需要对非洲特有的所有具有医学重要性的毒蛇的蛇毒蛋白进行分析。这有望有助于开发用于治疗非洲大陆内蛇伤中毒的更安全、更有效的抗蛇毒血清。在这篇综述中,从文献中提取了来自非洲最重要的毒蛇,即蝰科和眼镜蛇科的 34 种蛇毒的蛋白质组。根据毒液蛋白质组中蛋白质家族的丰度,将毒素家族分为主要、次要、次要和其他。蝰科蛇毒蛋白质组以蛇毒金属蛋白酶(SVMPs-41%)、蛇毒丝氨酸蛋白酶(SVSPs-16%)和磷脂酶 A(PLA-17%)蛋白家族为主,而三指毒素(3FTxs-66%)和 PLA(16%)则以眼镜蛇科为主。我们进一步综述了这些蛇毒被广泛用于非洲大陆的选定抗蛇毒血清中和的情况。对非洲蛇毒蛋白质组的分析将有助于开发针对蛇伤中毒的有效抗蛇毒血清,此外,还可能揭示蛇毒蛋白的治疗应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/54ac/9694588/413eec228d79/toxins-14-00723-g001.jpg

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