Abstract:
:Interferon tau (IFNT) was discovered as the pregnancy recognition signal in ruminants, but is now known to have a plethora of physiological functions in the mammalian uterus. The mammalian uterus includes, from the outer surface to the lumen, the serosa, myometrium and endometrium. The endometrium consists of the luminal, superficial glandular, and glandular epithelia, each with a unique phenotype, stromal cells, vascular elements, nerves and immune cells. The uterine epithelia secrete or selectively transport molecules into the uterine lumen that are collectively known as histotroph. Histotroph is required for growth and development of the conceptus (embryo and its associated extra-embryonic membranes) and includes nutrients such as amino acids and glucose, enzymes, growth factors, cytokines, lymphokines, transport proteins for vitamins and minerals and extracellular matrix molecules. Interferon tau and progesterone stimulate transport of amino acids in histotroph, particularly arginine. Arginine stimulates the mechanistic target of rapamycin pathway to induce proliferation, migration and protein synthesis by cells of the conceptus, and arginine is the substrate for synthesis of nitric oxide and polyamines required for growth and development of the conceptus. In ruminants, IFNT also acts in concert with progesterone from the corpus luteum to increase expression of genes for transport of nutrients into the uterine lumen, as well as proteases, protease inhibitors, growth factors for hematopoiesis and angiogenesis and other molecules critical for implantation and placentation. Collectively, the pleiotropic effects of IFNT contribute to survival, growth and development of the ruminant conceptus.
journal_name
Amino Acidsjournal_title
Amino acidsauthors
Bazer FW,Ying W,Wang X,Dunlap KA,Zhou B,Johnson GA,Wu Gdoi
10.1007/s00726-014-1905-xsubject
Has Abstractpub_date
2015-03-01 00:00:00pages
449-60issue
3eissn
0939-4451issn
1438-2199journal_volume
47pub_type
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