Re: She's Her Own Twin (Immune System Question)


"eBob.com" <fakename@xxxxxxxxxxxxxxxx> wrote in message
news:N1NGg.4014$zw6.696@xxxxxxxxxxxxxxxxxxxxxxxxx
I wonder about the immune system problems. As someone else pointed out,
this woman must have resulted from what would have been fraternal twins.
(Otherwise all of her DNA would have been the same.) But then why wouldn't
her immune system, I assume all from one twin or all from the other, have
mounted an attack on the tissue from the other twin?

They use blood for the inital DNA testing (the one that didn't match her
kids). All the white and red blood cells come from the same stem cells, so
you can be pretty sure that cells that make up her blood were different from
the ovary cells that made up her egg cells.

When the immune system is immature, the immune system becomes tolerant to
cells in the body, even if they are from someone else. This is why my white
blood cells don't attack my kidneys (at least I hope not). The immune system
would not attack cells present during development, like her twin's.

Jeff


.

Relevant Pages

  • Re: Inflammation and Evolution
    ... directed towards destruction of bacteria. ... tissue cleaning types of inflammation. ... is limited to the bare minimum required to remove the cells which are ... dedicated immune system is extremely energy-intensive. ...
    (talk.origins)
  • Tonsils and the immune system 2/2
    ... Here's how the immune system works. ... Most are known as B cells and T cells, ... filters that trap cancer cells, bacteria and other invaders and prevent them ... system to prevent a wide variety of infections, such as childhood diseases, ...
    (alt.support.arthritis)
  • Re: Michael B -- Magnesium For Life
    ... Supports immune system ... Aspartic Acid ... Removes toxins from skin cells ... Increases mental focus ...
    (alt.med.fibromyalgia)
  • Revitalising the Thymus
    ... thymus which produces the T cells required to fight infection but which shuts ... It also showed, for the first time, that prostate cancer patients ... Associate Professor Boyd said the immune system deteriorated severely with age, ...
    (uk.philosophy.humanism)
  • Re: News: Rat study shows dirty better than clean.
    ... WASHINGTON - Gritty rats and mice living in sewers and farms seem to ... Childhood vaccinations should challenge the immune system. ... don't reproduce like the actual pathogens, so you might not get as many ... plasma cells or cytotoxic T cells, but whenever you develop immunity to ...
    (talk.origins)