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  2. Leydig cell - Wikipedia

    en.wikipedia.org/wiki/Leydig_cell

    Leydig cells release a class of hormones called androgens (19-carbon steroids). [8] They secrete testosterone, androstenedione and dehydroepiandrosterone (DHEA), when stimulated by the luteinizing hormone (LH), which is released from the anterior pituitary in response to gonadotropin releasing hormone which in turn is released by the hypothalamus.

  3. Retinal regeneration - Wikipedia

    en.wikipedia.org/wiki/Retinal_regeneration

    Researchers at Moorfields Eye Hospital had already been using human embryonic stem cells to replace the pigmented lining of the retina in patients with Stargardt's disease. The team is also restoring vision to blind patients with an electronic retinal implant which works on a similar principle of replacing the function of the light-sensing ...

  4. Leydig cell hypoplasia - Wikipedia

    en.wikipedia.org/wiki/Leydig_cell_hypoplasia

    The symptoms of Leydig cell hypoplasia include pseudohermaphroditism, i.e., feminized, ambiguous, or relatively mildly underdeveloped (e.g., micropenis, severe hypospadias, [6] and/or cryptorchidism [undescended testes]) external genitalia, a female gender identity or gender variance, hypergonadotropic hypogonadism (hypogonadism despite high levels of gonadotropins), delayed, impaired, or ...

  5. 7 foods that kill and lower testosterone - AOL

    www.aol.com/7-foods-kill-lower-testosterone...

    Some foods, for example, increase inflammation, another process that affects hormonal levels. Specifically, inflammation negatively impacts Leydig cells, which are in charge of producing ...

  6. 13 sneaky signs your testosterone is too low

    www.aol.com/13-sneaky-signs-testosterone-too...

    Testosterone stimulates osteoblasts to deposit bone, so if your T levels are low, you may make less bone. What's more, estrogen (which remember is a byproduct of T in men), stops osteoclast activity.

  7. Using stem cells, doctors restored vision to people with ...

    www.aol.com/news/using-stem-cells-doctors...

    The accident triggered an eye condition called limbal stem cell deficiency, which can lead to painful ulcers, clouding of the cornea and blindness.These stem cells are from the limbus, a zone of ...

  8. Adaptation (eye) - Wikipedia

    en.wikipedia.org/wiki/Adaptation_(eye)

    The human eye can function from very dark to very bright levels of light; its sensing capabilities reach across nine orders of magnitude. This means that the brightest and the darkest light signal that the eye can sense are a factor of roughly 1,000,000,000 apart. However, in any given moment of time, the eye can only sense a contrast ratio of ...

  9. Luteinizing hormone - Wikipedia

    en.wikipedia.org/wiki/Luteinizing_hormone

    The Leydig cells produce testosterone under the control of LH. LH binds to LH receptors on the membrane surface of Leydig cells. Binding to this receptor causes an increase in cyclic adenosine monophosphate (cAMP), a secondary messenger, which allows cholesterol to translocate into the mitochondria.