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A Cataldi

Publications and source records attributed to A Cataldi.

164 records · Page 10Linked to original sources

Crohn's-like colitis in glycogen storage disease Ib: a case report.

Association between glycogen storage disease type Ib and Crohn's like disease is rare. We present one such case. A young woman with glycogen storage disease type Ib underwent a right hemicolectomy for stenosis and a blind fistulous tract. The histological picture of the resected bowel was consistent with the diagnosis of Crohn's like disease. A leak in the entero-colostomy occurred during medical treatment with steroids, sulfasalazine, and methronidazole. Partial ileal and colonic resection and a new anastomosis were then performed. Recombinant human colony-stimulating factor (300 mcg/die subcutaneously) was then started. The neutrophils promptly increased to a normal range, and the neutrophil function tests improved. The postoperative course was uneventful and the patient did not have a relapse of the bowel disease.

Adult↗

Engagement of DNA polymerases during apoptosis.

DNA replicative and repair machinery was investigated by means of different techniques, including in vitro nuclear enzymatic assays, immunoelectron microscopy and confocal microscopy, in apoptotic cell lines such as HL-60 treated with methotrexate, P815 and K562 exposed to low temperatures and Friend cells exposed to ionizing radiation. The results showed a shift of DNA polymerase alpha and beta activities. DNA polymerase alpha, which in controls was found to be the principal replicative enzyme driving DNA synthesis, underwent, upon apoptosis, a large decrease of its activity being replaced by DNA polymerase beta which is believed to be associated with DNA repair. Such a modulation was concomitant with a topographical redistribution of both DNA polymerase alpha and the incorporation of BrdUrd throughout the nucleus. Taken together, these results indicate the occurrence of a dramatic response of the DNA machinery, through a possible common or at least similar behaviour when different cell lines are triggered to apoptosis. Although this possibility requires further investigation, these findings suggest an extreme attempt of the cell undergoing apoptosis to preserve its nuclear environment by switching on a repair/defence mechanism during fragmentation and chromatin margination.

Animals↗