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TH3 cells are involved in mucosal immunity and protecting mucosal surfaces in the gut from nonpathogenic non-self antigens. They mediate this non-inflammatory environment by secreting TGF-beta and IL-10. TGF-beta promotes the class switch to low concentrations of IgA which is noninflammatory. IgA does not usually activate the complement system and is not involved with phagocytosis. TH3 inhibits TH1 and TH2 cells.


T helper 3 cell (Th3) have different cytokine requirements for their growth from CD25+ CD4+ Treg cells. The survival of CD25+ CD4+ Treg cells is dependent upon interleukin 2 (IL-2)[1], while in vitro differentiation of Th3 cells is enhanced by transforming growth factor beta (TGF-β), IL-4, and IL-10.

Findings suggest that Th3 cells are a different linage from naturally arising CD25+ CD4+ Treg cells, but it is still unclear whether Th3 cells are the same as induced Treg cells because of the lack of a specific marker for Th3 cells. It was previously shown that TGF-β was produced by intestinal dendritic cells,[2][3] which has been considered to be the source of cytokines for the induction of Th3 cells in the intestine. Additionally, since TGF-β production was induced by cytotoxic T-lymphocyte antigen 4 (CTLA-4), which is constitutively expressed on naturally arising Treg cells,[4] it is possible that TGF-β production from Treg cells through CTLA-4–mediated signaling may stimulate the differentiation of both induced Treg cells and Th3 cells.

References [link]

  1. ^ Sakaguchi, S; Ono, M; Setoguchi, R; Yagi, H; Hori, S; Fehervari, Z; Shimizu, J; Takahashi, T et al. (2006). "Foxp3+ CD25+ CD4+ natural regulatory T cells in dominant self-tolerance and autoimmune disease". Immunol Rev 212: 8–27. DOI:10.1111/j.0105-2896.2006.00427.x. PMID 16903903. 
  2. ^ Johansson, C; Kelsall, BL (2005). "Phenotype and function of intestinal dendritic cells". Semin Immunol 17 (4): 284–294. DOI:10.1016/j.smim.2005.05.010. PMID 15978836. 
  3. ^ Iwasaki, A (2007). "Mucosal dendritic cells". Annu Rev Immunol 25: 381–418. DOI:10.1146/annurev.immunol.25.022106.141634. PMID 17378762. 
  4. ^ Chen, W; Jin, W; Hardegen, N; Lei, KJ; Li, L; Marinos, N; McGrady, G; Wahl, SM (2003). "Conversion of Peripheral CD4+CD25− Naive T Cells to CD4+CD25+ Regulatory T Cells by TGF-β Induction of Transcription Factor Foxp3". J Exp Med 198 (12): 1875–1886. DOI:10.1084/jem.20030152. PMC 2194145. PMID 14676299. //www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2194145. 
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TH3

TH3 is a clothing brand of Canadian company Euro Verve Company Limited that manufactures apparel and accessories. The company has headquarters in Toronto, Canada and Hong Kong.

Company profile

Euro Verve Company Limited was founded in 1987 as a garment trading company and manufacturer with exports to the United States, Canada and the European Union. Euro Verve's main focus is on active wear and casual wear such as sweaters, knit shirts, T-shirts and yoga apparel. The company sells mainly to chains, retailers and importers, while the yoga apparel is sold directly to gyms and independent stores. Garments and accessories sold direct to retailers and consumers are marketed under the TH3 brand, and this includes a line of yoga apparel sold in Canada and through online shopping outlets.

External links

  • www.th3.ca
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