Humans have long envied animals that are able to regenerate parts of their bodies. Arms, legs, tails, even whole chunks of the organism. Yet despite all the technology and best efforts, humans don’t have this ability. However, this could all change. Harvard University uncovered the DNA switch that controls genes for whole body regeneration. This means that one day, humans may be able to grow back lost limbs!

Many people know that certain animals are able to achieve extraordinary feats of repair, such as salamanders which grow back legs, or geckos which can shed their tails to escape predators and then form new ones in just two months. It doesn’t stop there either. Planarian worms, jellyfish, and sea anemones take this regeneration to a whole new level and can actually regenerate their entire bodies after being cut in half.

A new clock that analyzes the age of the immune system may be the next big thing in aging biomarkers.

Measuring the age of your immune system

As we age, our immune systems begin to decline due to many factors, including the thymus shrinking and producing ever-fewer T cells, the ever-increasing chronic inflammation called “inflammaging”, dysfunctional immune cells doing more harm than good, and a lifetime of microbial burden taking its toll. This gradual decline of the immune system is known as immunosenescence.

Humans may one day have the ability to regrow limbs after scientists at Harvard University uncovered the DNA switch that controls genes for whole-body regeneration.

Some animals can achieve extraordinary feats of repair, such as salamanders which grow back legs, or geckos which can shed their tails to escape predators and then form new ones in just two months.

Planarian worms, jellyfish, and sea anemones go even further, actually regenerating their entire bodies after being cut in half.

In 2015, in a secret medical procedure carried out in Bogota, Colombia, the 44-year-old woman got dozens of experimental gene-therapy injections. Why? Because Parrish, the creator of a longevity company called BioViva, believes that science is on the cusp of delivering radically longer lifespans—and she wants to help bring on the revolution.

Today, we want to point out a new study suggesting that senescent cells in bone marrow cell populations contribute to the decline of the hematopoietic system, particularly the hematopoietic stem and progenitor cells (HSPCs) that live in the bone marrow and produce our blood cells [1].

The hematopoietic system and immunosenescence

The hematopoietic system is the system of organs and tissues, including the bone marrow, spleen, thymus and lymph nodes, involved in the creation of cellular blood components.