Penicillamine induced changes in growing rats. II. liver parenchymal cell

Zusammenfassung d-Penicillamin als Kupferchelator bewirkt im Langzeitversuch eine isolierte Veränderung der stereologischen Parameter der Mitochondrien und der «microbodies». Zusammenhänge mit der Aktivitätshemmung kupferhaltiger Oxydasen in den beiden Zellorganellen werden vermutet.     

Orange II induced cytogenetical changes in albino mice

Summary Daily feeding of the common food color Orange II to mice in doses of up to 3.0 g/kg b.wt for 180 days had deleterious effects on somatic and spermatogonial chromosomes. The chromosomal abnormalities induced were breaks, gaps, constrictions, centric fusion, fragments of unknown origin, translocation, deletion, stickiness, ring chromosomes, pyknosis and other bizarre configurations.Grateful acknowledgment is made to Prof. U.S. Srivastava, Zoology Department for providing necessary laboratory facilities.     

Mitochondrial changes induced by diphtheria toxin in chicken embryo heart cell cultures

Riassunto L'autore ha preso in considerazione l'effetto della tossina difterica in varie concentrazioni sulle cellule di cuore di embrione di polio coltivate in vitro. L'effetto saliente consiste in un effetto rigonfiante, assai precoce, sui mitocondri. Ogni altro effetto citopatico è più tardivo. L'autore prospetta l'ipotesi che il rigonfiamento mitocondriale sia correlato a lesione biochimica del metabolismo energetico.

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Acknowledgment: I wish to express my gratitude to Prof.Falchetti of the Slavo Institute for the generous supply of diphtheria toxin and to Mr.Raffaele Gentile for his valuable technical collaboration.     

Leydig cell function in streptozotocin-induced diabetic rats.

Streptozotocin diabetic rats were infertile as a result of decreased Leydig cell function of the testes. The major changes found were: decreased number of Leydig cells and their spontaneous secretion of testosterone. No change in the receptors to LH on the Leydig cells was observed. LH was found to be obligatory for the regulation of Leydig cell function and fertility.     

Liver cell necrosis in rats after prolonged ethanol ingestion under the influence of an alcohol-dehydrogenase inhibitor

Zusammenfassung Alkoholzufuhr bei partieller Hemmung der Alkoholdehydrogenase durch Pyrazol führte bei Ratten mit ihrem relativ hohen Alkoholumsatz in kurzer Zeit zu ausgedehnten Leberzellnekrosen, bei einigen Tieren auch zu bindegewebigen Reparations- und Umbauvorgängen.     

Hepatic parenchymal cell and nuclear volume in hypophysectomized toad (Bufo melanosticuts)

Résumé On a noté une décroissance significative dans les volumes des cellules hépatiques (et aussi dans leurs volumes nucléaires) du crapaud hypophysectomié par rapport au non-hibernant. Ceci est probablement dû à un changement du modèle-type métabolique ou, peut-être, à l'action directe hormonale déséquilibrée, exercée sur les cellules hépatiques à la suite de l'hypophysectomie.     

Liver phospholipides after carbon tetrachloride intoxication in rats

Riassunto Dopo avvelenamento acuto di ratti con CCl₄ somministrato con dose singola per via orale l'incorporazione in vivo di P³² nei fosfolipidi del fegato è alterata precocemente. A 80 min dalla somministrazione del tossico si osserva un forte aumento delle P³²-lisolecitine, mentre risulta bloccata la sintesi di acido fosfatidico.     

Biochemical and morphological changes induced by Triton-X 100 in skeletal muscle of rats after abdominal aorta ligation

Riassunto Il Triton-X 100 somministrato in vivo a ratti dopo legatura dell'aorta addominale provoca l'aumento di alcuni enzimi lisosomiali e la comparsa di focolai necrotici nei muscoli degli arti posteriori, simili a quelli osservabili nelle lesioni di tipo ischemico.

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This study was supported by grant (contract No. 71. 00822.04. 115.658) of the Consiglio Nazionale delle Ricerche.

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We are indebted to Mr.R. Bergo for his skilful technical assistance     

Myopathic changes at the end-plate region induced by neostigmine methylsulfate.

Administration of large dose of neostigmine caused very quickly marked myopathic changes at the motor end-plate region. With continued injections, however, some recovery of the structural features did occur suggesting the reconstructive changes in the affected regions.     

Galactose induced Balbiani-ring-like structures in chromosomes I and II of Chironomus thummi.

In one strain of Chironomus thummi, galactose feeding of the larvae induced the appearance of 2 Balbiani-ring-like structures on salivary gland chromosomes I and II. This phenomenon may be related to the galactose induction of BR6 in C. pallidivittatus.