Citazione:
The beneficial and detrimental effects of linoleic acid on autoimmune disorders.
* Namazi MR.
Dermatology Department, Shiraz University of Medical Sciences, Shiraz, Iran. namazi_mr@yahoo.com
Type 1, or cellular, immune response is characterized by overproduction of IL-1, IL-2, IFN-gamma and TNF-alpha and is the underlying immune mechanism of some autoimmune disorders such as psoriasis, alopecia areata, rheumatoid arthritis, Crohn's disease, multiple sclerosis, insulin-dependent diabetes mellitus and experimental autoimmune uveitis. Type 2 immune response is seen in allergic and antibody-mediated autoimmune diseases and is characterized by IL-4, IL-6 and IL-10 overproduction. Linoleic acid is a precursor of prostaglandin E2 (PGE2) and its intake results in tissue production of PGE2, especially in the absence of other polyunsaturated fatty acids (PUFAS) which inhibit this conversion. PGE2 decreases the production of IL-1, IL-2, IFN-gamma and TNF-alpha and proliferation of TH1 cells and increases the production of IL-4, leading to suppression of the type 1 immune response. Taken together, linoleic acid, the major PUFA of maize oil, could have therapeutic efficacy against cellular autoimmune disorders. On the other hand, excessive intake of linoleic acid may aggravate type 2 autoimmune disorders.
PMID: 15115315 [PubMed - indexed for MEDLINE]
J Dermatol Sci. 2003 Apr;31(2):91-8.Click here to read Links
The extract of Thujae occidentalis semen
inhibited 5alpha-reductase and androchronogenetic alopecia of B6CBAF1/j hybrid mouse.
* Park WS,
* Lee CH,
* Lee BG,
* Chang IS.
Skin Research Team, Skin Research Institute, Amore Pacific Corporation R&D Center 314-1 Bora-ri, Kiheung-eup, Yongin-si, Kyounggi-do, South Korea. wspark@pacific.co.kr
BACKGROUND: The conversion of testosterone to dihydrotestosterone; 5alpha-androstan-17beta-ol-3-one by 5alpha-reductase plays a crucial role in hair baldness and prostatomegaly. Recent approach showed specific inhibitors for 5alpha-reductase type 2 such as finasteride promoted hair growth in male pattern alopecia. OBJECTIVE: In order to search for effective medicinal plant extracts applied topically for androgenetic alopecia, we screened natural plant extracts having inhibitory activities of 5alpha-reductase type 2 and demonstrated its biological function in androgen-rela
The beneficial and detrimental effects of linoleic acid on autoimmune disorders.
* Namazi MR.
Dermatology Department, Shiraz University of Medical Sciences, Shiraz, Iran. namazi_mr@yahoo.com
Type 1, or cellular, immune response is characterized by overproduction of IL-1, IL-2, IFN-gamma and TNF-alpha and is the underlying immune mechanism of some autoimmune disorders such as psoriasis, alopecia areata, rheumatoid arthritis, Crohn's disease, multiple sclerosis, insulin-dependent diabetes mellitus and experimental autoimmune uveitis. Type 2 immune response is seen in allergic and antibody-mediated autoimmune diseases and is characterized by IL-4, IL-6 and IL-10 overproduction. Linoleic acid is a precursor of prostaglandin E2 (PGE2) and its intake results in tissue production of PGE2, especially in the absence of other polyunsaturated fatty acids (PUFAS) which inhibit this conversion. PGE2 decreases the production of IL-1, IL-2, IFN-gamma and TNF-alpha and proliferation of TH1 cells and increases the production of IL-4, leading to suppression of the type 1 immune response. Taken together, linoleic acid, the major PUFA of maize oil, could have therapeutic efficacy against cellular autoimmune disorders. On the other hand, excessive intake of linoleic acid may aggravate type 2 autoimmune disorders.
PMID: 15115315 [PubMed - indexed for MEDLINE]
J Dermatol Sci. 2003 Apr;31(2):91-8.Click here to read Links
The extract of Thujae occidentalis semen
inhibited 5alpha-reductase and androchronogenetic alopecia of B6CBAF1/j hybrid mouse.
* Park WS,
* Lee CH,
* Lee BG,
* Chang IS.
Skin Research Team, Skin Research Institute, Amore Pacific Corporation R&D Center 314-1 Bora-ri, Kiheung-eup, Yongin-si, Kyounggi-do, South Korea. wspark@pacific.co.kr
BACKGROUND: The conversion of testosterone to dihydrotestosterone; 5alpha-androstan-17beta-ol-3-one by 5alpha-reductase plays a crucial role in hair baldness and prostatomegaly. Recent approach showed specific inhibitors for 5alpha-reductase type 2 such as finasteride promoted hair growth in male pattern alopecia. OBJECTIVE: In order to search for effective medicinal plant extracts applied topically for androgenetic alopecia, we screened natural plant extracts having inhibitory activities of 5alpha-reductase type 2 and demonstrated its biological function in androgen-rela