Apoptosis in polyploid cells of the blood-sucking hemipteran, Triatoma infestans Klug

dc.creatorMello, MLS
dc.date2005
dc.dateJUL-SEP
dc.date2014-11-15T07:44:54Z
dc.date2015-11-26T16:09:58Z
dc.date2014-11-15T07:44:54Z
dc.date2015-11-26T16:09:58Z
dc.date.accessioned2018-03-28T22:58:33Z
dc.date.available2018-03-28T22:58:33Z
dc.identifierCaryologia. Univ Florence Botany Inst, v. 58, n. 3, n. 281, n. 287, 2005.
dc.identifier0008-7114
dc.identifierWOS:000233231100013
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/78033
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/78033
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/78033
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1266750
dc.descriptionThe Malpighian tubules of the hemipteran, Triatoma infestans, grow through endopolyploidy. As a result, the number of tubule cells is constant throughout nymphal development and adult life, and nuclei with 32 degrees C and 64 degrees C Feulgen-DNA classes are maximally reached through DNA endoreplication. Feulgen-DNA classes > 64 C, with resulting giant nuclei, may occur only through nuclear and cellular fusions, elicited by stressing agents such as heat shock and fasting. Although apoptosis has been reported in cells of Malpighian tubule epithelia, especially under stress conditions, the association between cell death and the degree of polyploidy resulting from different phenomena (either development or stress) has not yet been investigated. In this study, image analysis was used to estimate the Feulgen-DNA values of apoptotic nuclei in the Malpighian tubule cells of 5th instar nymphs of T infestans subjected to heat shock at 40 degrees C for I h and fasted for 15 days before the shock. The susceptibility to apoptosis was unrelated to an exclusive degree of nuclear ploidy reached in Malpighian tubules by insect development or elicited by stress. The occurrence of apoptosis in the giant nuclei suggests that the nuclear and cellular fusion, previously assumed to be a mechanism of cell survival in blood-sucking hemipterans, may not be totally effective against stressful conditions.
dc.description58
dc.description3
dc.description281
dc.description287
dc.languageen
dc.publisherUniv Florence Botany Inst
dc.publisherFlorence
dc.publisherItália
dc.relationCaryologia
dc.relationCaryologia
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectapoptosis
dc.subjectdevelopment
dc.subjectimage analysis
dc.subjectpolyploidies
dc.subjectstress
dc.subjectT infestans
dc.subjectPanstrongylus-megistus Burmeister
dc.subjectNuclear Phenotypes
dc.subjectCold Shocks
dc.subjectDna
dc.subjectChromatin
dc.subjectHeat
dc.subjectStarvation
dc.subjectReduviidae
dc.subjectExpression
dc.subjectSurvival
dc.titleApoptosis in polyploid cells of the blood-sucking hemipteran, Triatoma infestans Klug
dc.typeArtículos de revistas


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