Goldsmith Theodore C
Azinet LLC.
Curr Aging Sci. 2015 Apr 21.
For more than 150 years there has been some level of scientific argument regarding whether aging in humans and other mammals is purposely genetically programmed because living too long produces an evolutionary disadvantage, or whether aging in mammals is non-programmed because there is no such disadvantage. Although for many decades it was very widely thought that programmed aging in mammals was theoretically impossible, new evolutionary mechanics theories and new discoveries support programmed mammal aging as well as programmed lifespan limitation in non-mammals. The emergence of modern programmed aging theories has created a schism in the bioscience community regarding the programmed/ non-programmed issue. Because the two theories have radically different predictions regarding the fundamental nature of aging and consequently the nature of highly age-related diseases like cancer, stroke, and heart disease, resolving this issue is critical to medical research. This article summarizes the evolutionary mechanics basis of modern programmed and non-programmed aging theories, describes some of the many ancillary circumstances that continue to prevent resolution of this issue, and recommends steps that could be taken to rapidly resolve the programmed/ non-programmed conundrum.
150多年来,关于人类和其他哺乳动物的衰老是否是由基因特意编程控制的,一直存在一定程度的科学争论。一种观点认为,活得太长会产生进化劣势,所以衰老受基因编程控制;另一种观点则认为,哺乳动物的衰老不受编程控制,因为不存在这样的劣势。尽管几十年来人们普遍认为哺乳动物的程序性衰老在理论上是不可能的,但新的进化力学理论和新发现既支持哺乳动物的程序性衰老,也支持非哺乳动物的程序性寿命限制。现代程序性衰老理论的出现,在生物科学界就程序性/非程序性问题产生了分歧。由于这两种理论对衰老的基本性质以及诸如癌症、中风和心脏病等高年龄相关疾病的性质有着截然不同的预测,解决这个问题对医学研究至关重要。本文总结了现代程序性和非程序性衰老理论的进化力学基础,描述了许多继续阻碍该问题解决的辅助情况,并建议可以采取的步骤,以迅速解决程序性/非程序性难题。