Subacute cutaneous lupus erythematosus SCLE - Biotech, Pharma and Life Science Channel
Subacute cutaneous lupus erythematosus (SCLE) is a nonscarring non–atrophy-producing photosensitive dermatosis. SCLE may occur in patients with systemic lupus erythematosus (SLE), Sjögren syndrome, and deficiency of the second component of complement (C2d), or it may be drug induced.
SCLE occurs in genetically predisposed individuals, most often in patients with human leukocyte antigen B8 (HLA-B8), human leukocyte antigen DR3 (HLA-DR3), human leukocyte antigen DRw52 (HLA-DRw52), and human leukocyte antigen DQ1 (HLA-DQ1). A strong association exists with anti-Ro (SS-A) autoantibodies. The reaction is believed to be related to ultraviolet (UV) light modulation of autoantigens, epidermal cytokines, and adhesion molecules, with resultant keratinocyte apoptosis.
Worldwide, SLE prevalence ranges from 17-48 cases per 100,000 persons. The highest prevalence of SLE occurs in patients aged 40-60 years. The male-to-female ratio of SLE is approximately 1:10.
The basic therapy of skin disease uses sun-protection methods, such as sunscreens, sun-protective clothing, and alteration of exposure by decreasing activities during times of high intensity UV light. Topical corticosteroids are used, but Antimalarials are the mainstay of systemic therapy and are associated with lower rates of disease progression and lower risk of thrombovascular disease. Leprostatic agents, immunomodulators, gold compounds and retinoids can also be used.
Source; eMedicine Dermatology
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Medical and Biotech [MESH] Definitions
Mastocytosis, Cutaneous
Skin lesions due to abnormal infiltration of MAST CELLS. Cutaneous mastocytosis is confined to the skin without the involvement of other tissues or organs, and is mostly found in children. The three major variants are: URTICARIA PIGMENTOSA; diffuse cutaneous mastocytosis; and SOLITARY MASTOCYTOMA OF SKIN.
Haemophilus Paraphrophilus
A species of gram-negative bacteria in the genus HAEMOPHILUS, found in the normal flora of the human ORAL CAVITY and PHARYNX. It can cause SUBACUTE BACTERIAL ENDOCARDITIS; and BRAIN ABSCESS, among other conditions.
Coproporphyria, Hereditary
An autosomal dominant porphyria that is due to a deficiency of COPROPORPHYRINOGEN OXIDASE in the LIVER, the sixth enzyme in the 8-enzyme biosynthetic pathway of HEME. Clinical features include both neurological symptoms and cutaneous lesions. Patients excrete increased levels of porphyrin precursors, 5-AMINOLEVULINATE and COPROPORPHYRINS.
Porphyria, Variegate
An autosomal dominant porphyria that is due to a deficiency of protoporphyrinogen oxidase (EC 1.3.3.4) in the LIVER, the seventh enzyme in the 8-enzyme biosynthetic pathway of HEME. Clinical features include both neurological symptoms and cutaneous lesions. Patients excrete increased levels of porphyrin precursors, COPROPORPHYRINS and protoporphyrinogen.
Protoporphyria, Erythropoietic
An autosomal dominant porphyria that is due to a deficiency of FERROCHELATASE (heme synthetase) in both the LIVER and the BONE MARROW, the last enzyme in the 8-enzyme biosynthetic pathway of HEME. Clinical features include mainly neurological symptoms, rarely cutaneous lesions, and elevated levels of protoporphyrin and COPROPORPHYRINS in the feces.
