解构心血管和凝血相关的特征将饮食生态与多功能蛇毒特异性联系起来
Matthew L Holding1,2, M Hao Hao Pontius3, Meilyn S Ward1
1Life Sciences Institute, University of Michigan, 210 Washtenaw Ave., 48109 MI, United States.
Evolution; international journal of organic evolution
|March 11, 2026
概括
蛇毒的复杂性和功能与饮食有关. 蛇的更广泛的饮食导致更复杂的毒药,破坏了猎物的多个生理过程,支持进化生态学的原则.
科学领域:
- 进化生态学的进化生态学
- 生物化学 生物化学
- 毒理学 毒理学 毒理学
背景情况:
- 动物毒素表现出多样化的组成,复杂的毒素假设与更广泛的饮食范围相关.
- 饮食宽度假设认为,更大的饮食多样性会选择功能复杂度增加和更广泛的毒理效应的毒素.
研究的目的:
- 为了测试这种假设,即蛇的饮食宽度驱动了功能复杂毒的进化.
- 为了评估蛇的饮食多样性和毒液对不同类型的猎物心脏和静血功能的影响之间的关系.
主要方法:
- 通过六项生理学测试评估毒素的影响,重点关注心脏和血液凝固功能.
- 与不同饮食专业的蛇物种的毒液进行比较,包括一般医生 (Agkistrodon piscivorus,Sistrurus miliarius) 和专家 (Agkistrodon contortrix,Crotalus adamanteus,Azemiops feae).
- 研究了对鱼类 (斑马鱼) 和哺乳动物血静的影响,包括血小板和血小板聚合以及纤维素凝块的形成.
主要成果:
- 来自更广泛饮食的物种的蛇毒证明了鱼类和哺乳动物血静功能的破坏.
- 来自鱼类专家的Agkistrodon piscivorus毒液最显著地影响了斑马鱼的心率,血小板激活,血管透性和凝血.
- 哺乳动物专家毒药对斑马鱼生理学的影响很小,而S. miliarius毒药具有很高的毒性.
结论:
- 结果支持这样的假设,即饮食的宽度是功能复杂的蛇毒的进化的一个关键驱动因素.
- 了解毒液进化,蛇病理生理学和毒液衍生的治疗方法应该纳入进化生态观点.
更多相关视频
相关概念视频
02:39Predator-Prey Interactions
22.1K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
22.1K
01:19Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
682
Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
682
01:20Extrinsic and Intrinsic Pathways of Hemostasis
14.6K
Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
14.6K
01:20Evolutionary Psychology
1.1K
Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the...
1.1K
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
2.2K
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
2.2K
01:20Blood Studies for Cardiovascular System I: Cardiac Biomarkers
1.1K
Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
1.1K