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Biomedical subjects

N Natsume

Publications and source records attributed to N Natsume.

65 records · Page 4Linked to original sources
PubMed1986

Incidence of cleft lip and cleft palate in 39,696 Japanese babies born during 1983.

To estimate the incidence of cleft lip and/or cleft palate among the Japanese, 39,696 Japanese babies born during the period from January 1, 1983 to December 31, 1983, were investigated. It was found that 65 babies (0.163%) had these abnormalities, and that the ratio of the birth of such babies was approximately one per 611 in the population. Of the 65 affected babies, 41.3% presented cleft lip (CL), 46.0% cleft lip and palate (CL/P), and 12.7% cleft palate (CP). These results suggest that the incidence of CL/P in the Japanese is higher than that observed among other races.

Cleft Lip↗
PubMed1986

Teratogenesis of dexamethasone and preventive effect of vitamin B12.

Ddy mice which were treated with 0.32 mg of dexamethasone were used. Vitamin B12 was injected subcutaneously into the animals from the 10th day to the 13th day with a dosage of 0.1r, 1r, or 10r. The rate of incidence of cleft palate was decreased to 77.0% in the 0.1r group, 58.1% in the 1r group and 67.9% in the 10r group as compared to the control value of 88.5%.

Animals↗
PubMed1982

Analysis of transepidermal leukocyte chemotaxis in experimental dermatophytosis in guinea pigs.

In dermatophytosis, there is exocytosis of polymorphonuclear leukocytes (PMNs) toward the fungus-laden horny layer. To analyze this mechanism, we studied in vitro leukotactic properties of epidermal extracts prepared from lesions of experimental Trichophyton mentagrophytes infection in guinea pigs as well as fungus-derived chemotactic factors. Trichophyton mentagrophytes was found to release low-molecular-weight PMN chemotactic factors with its growth, like other microorganisms. Furthermore, it activated complement via the alternative pathway to produce complement-derived chemotactic factors in vitro. The epidermal extracts prepared from weakly inflammatory lesions of an early stage of T. mentagrophytes infection showed mild PMN chemotactic activity, which, as in those from irritated skin, was mostly due to the presence of low-molecular-weight chemotactic factors. After 8 days of infection, when prominent PMN migration took place together with the development of immune reactivity to fungus antigens, the epidermal extracts revealed strong leukotactic activity that showed a triphasic pattern by Sephadex G-75 chromatography similar to that observed in complement-activated serum. Since we could not demonstrate any deposition of immunoglobulins and complement on the fungal elements present in the horny layer, actual complement activation in vivo seems to occur after interaction of serum with soluble fungal components in the epidermis through both classic and alternative pathways. We think that the transepidermal migration of PMNs in dermatophytosis, together with contact sensitivity to fungal antigens, is responsible for induction of increased epidermopoiesis with resultant desquamation to eliminate the fungus-laden horny layer.

Animals↗