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Biomedical subjects

R MacKie

Publications and source records attributed to R MacKie.

27 records · Page 2Linked to original sources
PubMed1985

Cytotoxicity of etretinate and vindesine.

The effects of an aromatic retinoid, etretinate and a vinca alkaloid, vindesine were investigated by culture of malignant melanoma cells in vitro with these two agents; either separately or in combination. Etretinate inhibited growth of a murine melanoma but only minimal effects were recorded with two human melanomas. Vindesine however, was inhibitory for all of the cell lines and this effect was enhanced in the presence of the retinoid. Entry of 3H labelled vindesine or etretinate into drug free cells was followed in the absence or presence of unlabelled drug. It was found that etretinate enhanced cellular uptake of vindesine in two of the cell lines and this may be responsible for the enhanced toxicity of vindesine in the presence of etretinate. The human melanoma which did not exhibit retinoid stimulated vindesine uptake, appeared to be intrinsically sensitive to the vinca alkaloid. No effect on cellular retinoid uptake by vindesine was recorded in any of the melanomas. The results indicate that the intracellular concentrations combined with the intrinsic sensitivities of each cell line to etretinate and vindesine determines the toxic response.

Animals↗
PubMed1983

DNA repair in cells from patients with actinic keratosis.

UV-induced DNA repair was studied in peripheral blood lymphocytes from patients with multiple actinic keratoses (AK) requiring surgical therapy and from age-matched normal control individuals. The DNA repair activity in lymphocytes from AK patients at 4 h after UV-irradiation was 50% of that in control lymphocytes, but at 21 h the extent of DNA repair synthesis was similar to that in control cells.

DNA Repair↗
PubMed1982

A randomized trial of adjuvant chemotherapy and immunotherapy in cutaneous melanoma.

In a randomized trial of adjuvant chemotherapy, immunotherapy, or immunochemotherapy, 761 evaluable patients with pathological Stage II cutaneous melanoma anywhere on the body or with pathological Stage I melanoma of the trunk (Clark's level 3 to 5) were studied by the World Health Organization International Melanoma Group. Wide local excision and excisional regional lymphadenectomy alone were performed in 185 patients and the results were compared with those of surgery plus chemotherapy with dacarbazine (in 192 patients), surgery plus immunotherapy with bacille Calmette-Guérin vaccine (in 203), and surgery plus chemotherapy combined with immunotherapy (in 181). The rates of disease-free survival and overall survival at 36 months were 30.4 +/- 8.3 per cent (mean +/- S.E.) and 41.6 +/- 10.0 per cent, respectively, after surgical treatment alone; 37.2 +/- 7.9 per cent and 46.5 +/- 8.3 per cent after surgery plus chemotherapy; 34.8 +/- 7.9 per cent and 48.7 +/- 8.7 per cent after surgery plus immunotherapy; and 33.6 +/- 7.9 per cent and 50.0 +/- 8.8 per cent after surgery plus a combination of chemotherapy and immunotherapy. None of the differences between groups was significant, and thus no effect of adjuvant therapy could be demonstrated in this study.

BCG Vaccine↗
PubMed1979

Vitiligo patterns simulating autoimmune and rheumatic diseases.

Several variants of generalised vitiligo can be recognised by their cutaneous distribution. In some, certain anatomical regions--e.g., hands--are predominantly affected while the cutaneous depigmentation in other variants shows a similar anatomical distribution to that of the internal structures affected in some of the autoimmune and rheumatic diseases. Five patients have been seen, and three described by others, with vitiligo affecting skin of eyelids and lower front of neck, reminiscent of the anatomical distribution of lesions in thyrotoxicosis with exophthalmos: two of these patients have thyrotoxicosis. Another variant of vitiligo mimicks the anatomical distribution of lesions in ankylosing spondylitis, Reiter's syndrome, and ulcerative colitis and there are cases simulating lupus erythematosus, rheumatoid arthritis, and psoriasis. It is suggested that the parts of the body affected in each vitiligo variant and its corresponding internal disease constitute a set os mosiac patches with distinctive shared characters. These may have morphogenetic functions during embryonic development and be potentially autoantigenic later in life.

Adolescent↗
PubMed1976

Lymphocyte abnormalities in mycosis fungoides.

Fourteen patients with clinical and histological evidence of mycosis fungoides have undergone a series of immunological tests. Significant findings include the presence of low numbers of E and EAC rosette-forming cells in the peripheral circulation of the mycosis fungoides patients. Elevated levels of IgE were seen in five of the mycosis fungoides patients, and the mean IgE level was significantly higher than in the control series. Possible explanations of these findings are considered.

Adult↗