Selection For Function In Early Life: Implications For Early-Onset Pathologies
Many persistent health problems, like tumors or chronic inflammation, are often thought to appear later in life when the body’s natural defenses against harmful traits weaken. However, a new idea challenges this view, suggesting that some well-organized and robust pathologies can develop surprisingly early. This perspective introduces the concept of “selection for function” within an organism. This isn’t about traditional natural selection acting on whole organisms, but rather a process operating inside the body, favoring structural arrangements that enhance stability and robustness, even if these structures are not reproducing cells. This internal selection can occur long before the period in life when the overall effectiveness of natural selection typically declines.
There are several ways this early-life development of pathologies might happen. Sometimes, these abnormal structures might initially offer a local benefit, such as helping with tissue repair or containing an infection. In other cases, their negative effects might be limited or specific to certain situations, allowing them to persist undetected. Additionally, rapid changes in our environment, like exposure to pollutants, hormone-disrupting chemicals, or new diets, can alter the conditions within our tissues, promoting the formation of these stable, but ultimately harmful, structures.
Understanding these early-onset conditions as outcomes of dynamic processes within our tissues, rather than simple developmental mistakes, changes how we think about their origins. This new understanding also points to novel ways to treat and prevent these diseases. Instead of solely focusing on individual cells, future treatments could aim to disrupt the fundamental architecture and organization of these pathological tissues and structures.
Source: link to paper