Health Boards
Tue-19-02-2013, 13:15 PM
mTOR (mammalian target of rapamycin) also known as mechanistic target of rapamycin or FK506 binding protein 12-rapamycin associated protein 1 (FRAP1) is a protein which in humans is encoded by the FRAP1 gene. mTOR is a serine/threonine protein kinase that regulates cell growth, cell proliferation, cell motility, cell survival, protein synthesis, and transcription. mTOR belongs to the phosphatidylinositol 3-kinase-related kinase protein family.
This study published in the British Journal of Dermatology suggests that mTOR inhibition might be a mode of action suitable to be explored for a new psoriasis treatment.
Background:
mTOR (mammalian target of rapamycin) signalling integrates signals leading to cellular growth, proliferation and differentiation. Disturbance of this tightly regulated interplay leads to malignancies, as reflected by altered mTOR signalling in epidermal tumours. As psoriatic keratinocytes also show features of perturbed cell growth and differentiation, the question arises whether mTOR signalling also plays a role in the pathogenesis of psoriasis.
Objectives:
Investigation of the activation status of mTOR signalling components in psoriasis
Methods:
Biopsies from lesional and non-lesional skin of psoriasis patients (n=10) as well as samples from healthy donors (n=3) were analysed by immunohistochemistry and Western blot, utilizing antibodies detecting phosphorylated mTOR (P-mTOR), P-S6K and P-S6 ribosomal protein.
Results:
We found mTOR and its downstream signalling molecule, the ribosomal protein S6 to be activated in lesional psoriatic skin. While mTOR is activated throughout the whole epidermis, with particularly strong activation in the basal layer, S6 is rather active in suprabasal layers of differentiating keratinocytes.
Conclusions:
Altogether these results suggest a role for mTOR signalling in the epidermal changes leading to the psoriatic phenotype. mTOR inhibition might be a mode of action suitable to be explored for innovative anti-psoriatic drugs.
Source: NO LINKS ALLOWED
This study published in the British Journal of Dermatology suggests that mTOR inhibition might be a mode of action suitable to be explored for a new psoriasis treatment.
Background:
mTOR (mammalian target of rapamycin) signalling integrates signals leading to cellular growth, proliferation and differentiation. Disturbance of this tightly regulated interplay leads to malignancies, as reflected by altered mTOR signalling in epidermal tumours. As psoriatic keratinocytes also show features of perturbed cell growth and differentiation, the question arises whether mTOR signalling also plays a role in the pathogenesis of psoriasis.
Objectives:
Investigation of the activation status of mTOR signalling components in psoriasis
Methods:
Biopsies from lesional and non-lesional skin of psoriasis patients (n=10) as well as samples from healthy donors (n=3) were analysed by immunohistochemistry and Western blot, utilizing antibodies detecting phosphorylated mTOR (P-mTOR), P-S6K and P-S6 ribosomal protein.
Results:
We found mTOR and its downstream signalling molecule, the ribosomal protein S6 to be activated in lesional psoriatic skin. While mTOR is activated throughout the whole epidermis, with particularly strong activation in the basal layer, S6 is rather active in suprabasal layers of differentiating keratinocytes.
Conclusions:
Altogether these results suggest a role for mTOR signalling in the epidermal changes leading to the psoriatic phenotype. mTOR inhibition might be a mode of action suitable to be explored for innovative anti-psoriatic drugs.
Source: NO LINKS ALLOWED