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Aromatase excess syndrome (AES or AEXS) is a rarely diagnosed genetic and endocrine syndrome which is characterized by an overexpression of aromatase, the enzyme responsible for the biosynthesis of the estrogen sex hormones from the androgens, in turn resulting in excessive levels of circulating estrogens and, accordingly, symptoms of hyperestrogenism.
Liver cirrhosis is another cause, though through lowered metabolism of estrogen, not oversecretion or overconsumption like the aforementioned. It's necessary to know there exist two kinds of hyperestrogenism: Absolute (more concentration than usual of estrogen) and relative (a normal concentration of estrogen, higher with respect to progesterone).
All of the forms of estrogen found in the human body are able to bind to estrogen receptors (ER) present on cells. This initiates transcription in these cells, resulting in control of gene expression. [12] Treatment strategies that work by blocking the effect of estrogen on breast cancer are referred to as endocrine (or hormone) therapies.
ALS occurs more commonly in men than in women, and women get the disease later in life compared to men. [12] This suggested the possible protective role of estrogen in ALS. By conducting treatment of 17β-estradiol to ovariectomy treated mice, scientists found significantly delay of disease progression. [13]
Because steroid hormones are powerful drivers of gene expression in certain cancer cells, changing the levels or activity of certain hormones can cause certain cancers to cease growing, or even undergo cell death. Surgical removal of endocrine organs, such as orchiectomy and oophorectomy can also be employed as a form of hormonal therapy.
The cancer stem cell hypothesis proposes that the different kinds of cells in a heterogeneous tumor arise from a single cell, termed Cancer Stem Cell. Cancer stem cells may arise from transformation of adult stem cells or differentiated cells within a body. These cells persist as a subcomponent of the tumor and retain key stem cell properties.
The mechanism of action of SERDs involves binding to the estrogen receptor, leading to a conformational change that facilitates recruitment of cellular machinery to degrade the receptor protein. By promoting degradation of the estrogen receptor, SERDs effectively inhibit estrogen signaling within cancer cells, thereby suppressing tumor growth.
Men and women exhibit different symptoms for hypergonadism. A few of the symptoms that men can experience are increased sex drive, early balding, excessive muscle mass, and acne. Women can have symptoms such as, increased growth of facial hair, deepened voice, coarse body hair, and an irregular menstrual cycle. [5]