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Biomedical subjects

B Chamak

Publications and source records attributed to B Chamak.

22 records · Page 2Linked to original sources
PubMed1985

Survival of intracerebrally grafted rat dopamine neurons previously cultured in vitro.

Fetal rat dopamine (DA) neurons were cultured in vitro for a 6-day period and transported, after redissociation, for 2 days prior to being grafted to the neostriatum of adult rats with 6-hydroxydopamine lesions of the ascending nigrostriatal pathway. In 2 of the 5 graft recipients that were tested for amphetamine-induced motor asymmetry, the grafts eliminated the lesion-induced turning behaviour within 3-6 weeks after transplantation. Fluorescence histochemistry revealed surviving grafts in all 6 recipients at 7 weeks after transplantation, containing between 42 and 125 DA neurons. The number of surviving DA neurons in the 3 non-compensated rats was below the minimum number of cells previously found to be necessary for functional effects on turning behaviour to occur.

Animals↗
PubMed1982

Immune complex-mediated lung injury produced by horseradish peroxidase (HRP) and anti-HRP antibodies in rats.

Horseradish peroxidase (HRP) was administered intratracheally to rats with circulating autologous or heterologous anti-HRP antibodies. Intrapulmonary immune complexes containing HRP, anti-HRP antibodies, but no C3, were detected by immunofluorescence from 1 hour to 48 hours with a maximum of 6 hours after antigenic challenge. The concomitant hemorrhagic alveolitis characterized by fibrin deposits and infiltration by polymorphs and macrophages was also maximal after 6 hours. At the ultrastructural level, HRP was easily detected, and HRP-containing immune deposits were demonstrated along the basement membrane in subepithelial and subendothelial localization and in interstitial spaces. These findings suggest a C3 independent mechanism for lung injury mediated by immune complexes formed in situ.

Animals↗