A natural ligand for the orphan receptor GPR15 modulates lymphocyte recruitment to epithelia
We describe the purification from porcine colonic tissue extracts of an agonistic ligand for GPR15 and its functional characterization. In humans, this ligand, which we named GPR15L, is encoded by the gene C10ORF99 and has some features similar to the CC family of chemokines. GPR15L was found in some human and mouse epithelia exposed to the environment, such as the colon and skin. In humans, GPR15L was also abundant in the cervix. In skin, GPR15L was readily detected after immunologic challenge and in human disease, for example, in psoriatic lesions. Allotransplantation of skin from Gpr15l-deficient mice onto wild-type mice resulted in substantial graft protection, suggesting nonredundant roles for GPR15 and GPR15L in the generation of effector T cell responses. Together, these data identify a receptor-ligand pair that is required for immune homeostasis at epithelia and whose modulation may represent an alternative approach to treating conditions affecting the skin such as psoriasis.
Publication date: 1 June 2018 Source:Carbohydrate Polymers, Volume 189 Author(s): Priyanka Choudhury, Satish Kumar, Abhishek Singh, Ashutosh Kumar, Navneet Kaur, Sridhar Sanyasi, Saurabh Chawla, Chandan Goswami, Luna Goswami Patho-physiologies related to skin are diverse in nature such as burns, skin ulcers, atopic dermatitis, psoriasis etc. which impose severe bio-medical problems and thus enforce requirement of new and healthy skin prepared through tissues engineering methodologies. However, fully functional and biodegradable matrix for attachment, growth, proliferation and differentiation of the relevant cells is not a...
ConclusionOCTA can image capillary blood flow and structural features within skin in vivo, which has the potential to provide new insights into the pathophysiology, as well as dynamic changes of skin diseases, valuable for diagnoses, and non‐invasive monitoring of disease progression and treatment. Lasers Surg. Med. © 2018 Wiley Periodicals, Inc.
We report here that epidermal galectin-3 expression is significantly downregulated in lesional skin, but not in non-lesional skin in psoriasis patients, nor in a group of diseases known as psoriasiform dermatitis clinically and histologically similar to psoriasis. The deficiency of epidermal galectin-3 is sufficient to promote development of psoriatic lesions, as evidenced by more severe skin inflammation in galectin-3 knockout (gal3(-/-)) mice, compared to wild-type mice, after imiquimod treatment, and in skin from gal3(-/-) mice grafted onto wildtype mice. The development of psoriatic-like lesions is attributable to 1) t...
Conditions: Psoriasis; Cutaneous T Cell Lymphoma; Lymphoproliferative Disorders; Eczema; Lichen Planus; Prurigo; Pruritus; Polymorphic Light Eruption; Graft Vs Host Disease; Mastocytosis; Vitiligo Intervention: Other: Photo(chemo)therapy Sponsor: Medical University of Graz Recruiting
In conclusion, the permeable nanoparticle-gel system may be a potential carrier for the topical delivery of lipophilic anti-psoriatic drugs. PMID: 29035818 [PubMed - as supplied by publisher]