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Biomedical subjects

J Hewitt

Publications and source records attributed to J Hewitt.

At least 163 records · Page 9Linked to original sources
PubMed1976

Study of an inhibiting factor of epidermal proliferation in plucked skin and various tumours of mice.

The aim of our research was to investigate, by autoradiographic methods, the presence of an inhibitory factor (IF) in normal skin, in plucked skin and in five experimental skin tumors of the mouse, capable of inhibiting epidermal proliferation. The experimental model used was that of Bullough & Laurence (1960), i.e. a wound in the ear of a mouse. After tritiated thymidine administration the measurement of the labelling index confirmed the existence of an inhibitory substance in normal skin. The plucked skin had no inhibitory effect when it was taken 24 h after plucking, but after 4 days its effect had returned to normal. The skin tumours, whether epithelial or mesenchymal, showed the same inhibitory effect as normal skin whereas a non-cutaneous tumour tested had no inhibitory effect.

Animals↗
PubMed1975

[Pemphigus induced by D-penicillamine in rheumatoid arthritis. Study of 5 cases and systematic study of anti-intercellular substance antibodies of the skin in the course of treatment].

The authors present 5 cases of pemphigus induced by D-penicillamine in a series of 180 cases of rheumatoid arthritis treated with this medication. In addition, anti-epidermal intercellular substance antibodies were sought in 40 asymptomatic patients. No antibodies were found in this group. The notion of induced pemphigus seems well established, as is the value of testing for antibodies in the surveillance of D-penicillamine treatment.

Adult↗
PubMed1975

[Migrant eruptions in lupus erythematosus. Apropos of a case of lupus erythematosis gyratus repens].

Rare cases of migrant circinated eruptions occurring during the course of lupus erythematosus have been published so far. They have been classified in two categories: 1) supposed toxicodermias due to antimalarials; 2) real cases of erythema annulare centrifugum, mostly inaugurating the L. E. In an exceptional case, a migrating eruption looking like an erythema annulare with a complicated pattern on the trunk, neck and limbs, took place between two rashes of typical L.E. The exact nature of this eruption, clinically and histologically atypical, and its relation with the L.E. itself, have been discussed.

Aged↗
PubMed1975

[Skin pigmentation after amiodarone administration. Histogenetic problems].

The authors present a pathological study of the skin in a 62 year-old man with facial pigmentation due to amiodarone. They found under the light microscope, cells resembling histiocytes filled with pigment. They were less numerous than usually reported, but were found associated with a pericapillary and periglandular lymphocytic infiltration, which raises the problem of iatrogenic lupus or Jessner-Kanoff's disease. Examination under the electron microscope, permitted identification of 5 groups of granulations, three of which had already been observed by Mrs. Fagola. These pigments correspond to lipofuscins, melanin, but also yet unidentified substances, may be metabolites of amiodarone.

Amiodarone↗