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Biomedical subjects

N Basset

Publications and source records attributed to N Basset.

6 recordsLinked to original sources
PubMed1987

Acute adaptative changes to unilateral nephrectomy in humans.

Renal function was monitored in 20, living-related kidney donors before and after uninephrectomy. Urinary protein excretion and retinoid metabolism respectively were studied in 10 and 6 of these donors. The functional adaptation was characterized by an increase in glomerular filtration rate and tubular function, which began in the first two days after uninephrectomy. Changes in tubular function were also demonstrated by significant increases in the urinary excretion of beta 2 microglobulin (beta 2M), retinol binding protein (RBP), kappa and lambda light chains of immunoglobulins. In addition, a protein identical to or homologous to cellular retinoic acid binding protein (CRABP), appeared in the urine after nephrectomy. We did not find CRABP in serum samples either before or after nephrectomy, suggesting that urinary CRABP was synthesized by the remaining kidney. Increases in serum levels of Vitamin A and RBP were also observed in the post-nephrectomy period. These modifications in retinol metabolism suggest that these substances could have a role as renotropic growth factors in compensatory hypertrophy.

Adult↗
PubMed1987

Expression of c-Myc, c-Myb, c-Erb-B and c-H-Ras oncogene mRNAs in fibroblasts cultured from psoriatic patients.

The abnormally high rate of proliferation described in cultured psoriatic fibroblasts could result from inappropriate expression of cellular oncogenes (c-onc) associated to the control of cell division. Four c-onc (c-Myc, c-Myb, c-Erb-B, c-H-Ras) were studied in cultured fibroblasts from lesional and nonlesional psoriatic skin (n = 6) and compared with normal subjects (n = 3). RNA was analyzed by hybridization with nick-translated cloned human DNA probes after extraction by the guanidinium thiocyanate/LiCl procedure, electrophoresis and transfer on nitrocellulose. No difference in the level of c-Myc and c-Myb mRNA could be detected in psoriatic skin compared with controls. N-Ras did not give a detectable signal and c-Erb-B exhibited individual variations which were not linked to the disease. These results do not rule out subtle qualitative changes of these genes; moreover, an abnormal mRNA expression of other c-onc remains possible in psoriasis.

Cell Division↗
PubMed1987

Dapsone as initial treatment in superficial pemphigus. Report of nine cases.

Nine cases of superficial pemphigus that were treated by dapsone as the initial mode of therapy are reported. Five patients, all having low or negative serum anti-intercellular cement substance antibody titers, responded dramatically, while the other four patients, showing high titers of anti-intercellular cement substance antibodies, did not respond to this treatment. Complications of therapy were observed in three cases.

Adult↗
PubMed1986

[Retinoids].

Retinoids are natural and synthetic analogues of vitamin A. They have a marked influence on the differentiation of epithelial tissues by modifying membrane glycoconjugates and by acting through cytosolic and nuclear mechanisms like steroid hormones. Their clinical and biological toxic effects are numerous, but they are usually benign and reversible. However the possibility of teratogenic effects requires close monitoring of female patients. Etretinate is particularly effective in disorders of keratinisation (psoriasis, ichthyosis) whereas isotretinoin is the best known therapy of severe acne. Moreover the possible role of retinoids in the prevention and treatment of certain cancers gives hopeful prospects.

Acne Vulgaris↗