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M V Kumar

Publications and source records attributed to M V Kumar.

58 records · Page 4Linked to original sources
PubMedDate not supplied

Characterization of a TPA-response element in the 5'-flanking region of the androgen receptor gene.

The androgen receptor (AR) protein is an important transacting factor that is necessary for mediating gene expression of androgen-responsive genes. The expression of the AR gene is regulated by androgens and agents that utilize the calcium, protein kinase A, and protein kinase C pathways. Although the role of the calcium and protein kinase A pathways in the regulation of the AR gene has been investigated, the mechanism of regulation of AR through the protein kinase C pathway is not known. We have isolated the 5'-flanking region of the mouse AR gene and identified a consensus TPA (12-O-tetradecanoylphorbol 13-acetate)-response element (TRE). Transient transfection assays indicate that the TRE sequence is sufficient to confer TPA responsiveness to cells treated with TPA. Gel retardation assays and DNA footprint analysis demonstrated specific binding of the TRE and protection of the TRE sequence. Thus, these results describe a TRE in the 5'-flanking region of the AR gene and demonstrate that the TRE is responsive to TPA treatment.

Animals↗
PubMedDate not supplied

Dapsone syndrome--a five year retrospective analysis.

Seventeen cases of dapsone syndrome were seen in five years from 1992 onwards. Their mean age was 27.8 years (range 11 to 60 years). Male to female ratio was 1.1:1. Of these cases, seven had confirmed leprosy, nine were cases of suspected leprosy and one case had lichen planus. On an average, they developed the symptoms 27 days after the intake of dapsone. The cutaneous lesions were in the form of erythematous papules and plaques (13 cases), eczematous lesions (four cases) and associated bullous lesions (two cases). The other manifestations were: fever (16 cases), pruritus (15 cases), lymphadenopathy (14 cases), hepatomegaly (10 cases), icterus and oral erosions (five cases each), photosensitivity (four cases) and splenomegaly (two cases). Previous drug allergy was present in four cases. Elevated ESR and liver enzyme levels were invariable findings. Raised bilirubin levels and hemolytic anaemia were seen in eight cases. Apart from one case with hepatic encephalopathy, all other cases had a favourable outcome either on conservative management (eight cases) or on oral corticosteroids (eight cases). Oral provocation test was done in two cases with positive response while intradermal test was not very reliable.

Adolescent↗