Adaptaciones de Mamíferos Marinos y la Eterna Juventud | Yara Bernaldo de Quirós Miranda | TEDxULPGC

Quick Overview

The presentation by Yara Bernaldo de Quirós explores the remarkable longevity of bowhead whales (Balaena mysticetus), which can live over 200 years, contrasting this with the relatively short lifespan of humans, and highlights research showing that marine mammal arteries, unlike those of older rats, maintain elasticity, suggesting potential avenues for understanding and combating age-related cardiovascular diseases in humans.

Key Points: Bowhead whales (Balaena mysticetus) can live for more than 200 years, representing the longest-living mammal on the planet. The speaker references the venom of cone snails and proteins in the skin of certain frogs, which protect against infections, as examples of natural compounds inspiring drug development. The presentation draws a parallel between the aging process in whales/dolphins and humans, noting that marine mammals maintain superior arterial elasticity as they age, unlike older rats whose arteries stiffen. The speaker cites research data collected by Dr. Jessica Kendall-Bar and Paul Ponganis, based on the electrocardiogram of an adult bowhead whale, showing a heart rate of 2 beats per minute during deep dives. The research methodology involved dissecting arteries from young and old rats, and analyzing blood from adult dolphins, to measure arterial function and elasticity. The goal of this comparative study is to understand the mechanism allowing marine mammals to maintain healthy arteries despite long lifespans, potentially informing treatments for human age-related cardiovascular diseases.

Context: Yara Bernaldo de Quirós delivers a TEDx talk focused on bioprospecting—finding inspiration in nature to solve human problems, specifically aging and cardiovascular health. She uses the extreme longevity of the bowhead whale and the specialized physiology of marine mammals like dolphins to investigate why certain animals resist arterial stiffening, a major factor in human aging and heart disease.

Detailed Analysis

Yara Bernaldo de Quirós discusses the search for sources of extreme longevity and resilience in nature to combat human aging, particularly cardiovascular diseases. She points out that the bowhead whale can live over 200 years and possesses an enviable arterial health, contrasting this with the stiffening arteries seen in older rats. She references venom from cone snails and skin proteins from frogs as examples of compounds inspiring new drugs. A key piece of evidence is the study of bowhead whale blood, which showed a heart rate as low as 2 beats per minute during deep dives (03:40), and data collected by Drs. Kendall-Bar and Ponganis. The speaker contrasts the elastic arteries of marine mammals with the deteriorated, less elastic arteries of older rats when subjected to the same physiological stresses (like low oxygen or pressure changes during deep dives). The goal is to understand the mechanism that maintains arterial elasticity in these long-lived creatures to apply that knowledge to prevent age-related cardiovascular issues in humans, whose arteries become rigid over time.