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Human Polyclonal DEFA6 Primary Antibody for IHC, IHC (p) - ABIN4304790
Granlund, Beisvag, Torp, Flatberg, Kleveland, Ostvik, Waldum, Sandvik: Activation of REG family proteins in colitis. in Scandinavian journal of gastroenterology 2011
Show all 3 Pubmed References
In contrast to oxidized peptides, some reduced defensins exhibit increased vulnerability to proteolytic degradation. In this report, we investigated the susceptibility of Paneth-cell-specific human alpha-defensin 5 (HD-5) and -6 (HD-6) to intestinal proteases using natural human duodenal fluid
HD6 assembled into nanonets can prevent key steps in C. albicans pathogenesis
alpha-Defensin 6 Self-Assembly Prevents Adhesion and Suppresses Virulence Traits of Candida albicans
Downregulation of HD6 in noninflamed mucosa may contribute to mucosal barrier dysfunction of patients with Crohn's Disease.
Paneth cell alpha-defensin 6 is an antimicrobial peptide.
Native HD-6 readily self-assembles into elongated fibrils observable by transmission electron microscopy, agglutinates both Gram-negative and -positive bacteria, and prevents the Listeria monocytogenes from invading cultured cells.
Authors show that although NOD2 by itself can slightly up-regulate expression of HD5 and HD6, it can strongly down-regulates their expression during differentiation of the Paneth cell lineage mainly by inhibiting activation of the MAPK pathway.
In the meta-analysis, DEFA6 rs13275170 and DEFB1 rs2738169 had both a 1.3-fold increased odds ratio for gastric cancer.
study reports that HD6 affords protection against invasion by enteric bacterial pathogens in vitro and in vivo; after stochastic binding to bacterial surface proteins, HD6 undergoes ordered self-assembly to form fibrils and nanonets that surround and entangle bacteria
Defensins 5 and 6 enhance HIV-1 infectivity through promoting HIV attachment.
Regions 2, 3 & 9, 10 were more hydrophobic than other regions. It was difficult for the HD molecule to have many conformations because of its 3 S-S bridges; however, it responds to various external factors by restricting conformation.
Defensin alpha 6 (DEFA 6) may have a role in adenoma but not in progression to colon carcinoma
defensin alpha6 is highly expressed in colon cancer cell lines
Crystal structure of HD6.
Human enteric defensin (HD)-5 and HD-6 were detected in Paneth cells, which are observed in the gastric metaplastic mucosa as well as small intestinal epithelia.
Defensins are a family of microbicidal and cytotoxic peptides thought to be involved in host defense. They are abundant in the granules of neutrophils and also found in the epithelia of mucosal surfaces such as those of the intestine, respiratory tract, urinary tract, and vagina. Members of the defensin family are highly similar in protein sequence and distinguished by a conserved cysteine motif. Several alpha defensin genes appear to be clustered on chromosome 8. The protein encoded by this gene, defensin, alpha 6, is highly expressed in the secretory granules of Paneth cells of the small intestine, and likely plays a role in host defense of human bowel.
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