Apoptosis induced by gamma irradiation of Taenia solium metacestodes

• Published in: Parasitology research (1987) Vol. 90; no. 3; pp. 203 - 208
• Main Authors: FLORES-PEREZ, Ivan, GONZALEZ, Gladis Fragoso, SCIUTTO, Edda, DE ALUJA, Aline S
• Format: Journal Article
• Language: English
• Published: Berlin Springer 01-06-2003
• Subjects: Animal helminthic diseases; Animals; Apoptosis - radiation effects; Biological and medical sciences; Cricetinae; Female; Gamma Rays; Helminthic diseases; Infectious diseases; Male; Meat - parasitology; Medical sciences; Mesocricetus; Parasitic diseases; Swine - parasitology; Swine Diseases - parasitology; Taenia solium - growth & development; Taenia solium - pathogenicity; Taenia solium - radiation effects; Taeniasis - parasitology; Gamma irradiation; Pathogenic; Helmintha; Plathelmintha; Parasite; Cestoda; Invertebrata; Taenia solium; Apoptosis
• ISSN: 0932-0113; 1432-1955
• DOI: 10.1007/s00436-002-0819-9

Gamma irradiation of food is considered a possible approach to control food-borne diseases. In cysticercosis, previous studies have shown that irradiating (with 0.3 kGy) pork infected with Taenia solium larvae completely inhibits growth of the parasite. This study was conducted to evaluate the mechanisms that induce the effect of gamma irradiation on metacestodes of T. solium. Metacestodes were obtained from several infected pigs and irradiated with a dose of 0.3 kGy. The viability of the metacestodes was evaluated by their capacity to evaginate in vitro and in vivo development to tapeworms after they were orally infected into prednisolone-treated golden hamsters. Using the typical ladder pattern of fragmented DNA and the TdT-mediated DUTP-nick-end labeling assay, apoptosis was evaluated in metacestodes after irradiation and in the scolices and tapeworms recovered from infected hamsters at 21 days post-infection. Apoptosis was observed in the structure of scolices obtained from hamsters at 21 days post-infection with irradiated metacestodes, This study provides evidence of the existence of apoptosis in the irradiated metacestodes of T. solium and helps elucidate the possible mechanisms that are involved when gamma irradiation inhibits the normal development of the T. solium metacestode into the adult worm.