OPENSIVE MIND: STORY OF iAge

INFLAMMATION CLOCK

DATE :- 15.07.21

Introduction:-

A new type of age ‘clock’ can assess chronic inflammation to predict whether someone is at risk of developing age-related disorders such as cardiovascular and neurodegenerative disease. The clock measures ‘biological age’, which takes health into consideration and can be higher or lower than a person’s chronological age.

The inflammatory ageing clock (iAge), reported on 12 July in Nature Aging is one of the first tools of its kind to use inflammation to assess health. Other age clocks have used epigenetic markers, chemical groups that tag a person’s DNA as they age and are passed along as cells divide. The researchers who developed iAge hope that, because inflammation is treatable, the tool could help doctors determine who would benefit from intervention — potentially extending the number of years a person lives in good health.

Keeping time:-

iAge is based on the idea that as a person ages, their body experiences chronic, systemic inflammation because their cells become damaged and emit inflammation-causing molecules. This ultimately leads to wear and tear on their tissues and organs. People who have a healthy immune system will be able to neutralize this inflammation to some extent, whereas others will age faster.

An Experiment :-

To develop iAge, a team including systems biologist David Furman and vascular specialist Nazish Sayed at Stanford University in California analysed blood samples from 1,001 people aged 8–96 who are part of the 1000 Immunomes Project, which aims to investigate how signatures of chronic, systemic inflammation change as people age.

In particular, they pinpointed the immune-signalling protein, or cytokine, CXCL9 as a top contributor; it is mainly produced by the inner lining of blood vessels and has been associated with the development of heart disease.