2006
DOI: 10.1590/s0103-84782006000600030
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Chronic cardiomyopathy and encephalic spongy changes in sheep experimentally fed Ateleia glazioviana

Abstract: Fifteen mature crossbred sheep were fed different daily amounts (2.5-35g kg -1 bw) of the fresh green leaves of Ateleia glazioviana for different periods of time (1-24 days). One sheep was not fed the plant and served as a control. All

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Cited by 9 publications
(15 citation statements)
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(9 reference statements)
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“…The brainstem spongiosis described in this work can be ascribed to the direct action of S. fissuratum toxic principles (Haraguchi et al 2006;Yokosuka et al 2008), given that triterpene saponins can open calcium and potassium dependent channels in neuron cell membranes (McManus et al 1993), with a consequent cytotoxic oedema (McGavin and Zachary 2007). Central nervous system spongiosis also occurs in poisonings by plants such as Tetrapterys multiglandulosa in bovines and goats (Tokarnia et al 2000;Riet-Correa et al 2005), Ateleia glazioviana in bovines and sheep (Gava et al 2001;Raffi et al 2006), Helichrysum argyrosphaerum in sheep and goats (Van der Lugt et al 1996), beside Ornithogalum saundersiae and O. prasinum in bovines (Van der Lugt 2002). In these intoxications, electronic microscopic studies have shown that the lesion is a consequence of intramyelinic oedema of the white substance (Van der Lugt 2002;Riet-Correa et al 2005;Raffi et al 2006).…”
Section: Discussionmentioning
confidence: 99%
“…The brainstem spongiosis described in this work can be ascribed to the direct action of S. fissuratum toxic principles (Haraguchi et al 2006;Yokosuka et al 2008), given that triterpene saponins can open calcium and potassium dependent channels in neuron cell membranes (McManus et al 1993), with a consequent cytotoxic oedema (McGavin and Zachary 2007). Central nervous system spongiosis also occurs in poisonings by plants such as Tetrapterys multiglandulosa in bovines and goats (Tokarnia et al 2000;Riet-Correa et al 2005), Ateleia glazioviana in bovines and sheep (Gava et al 2001;Raffi et al 2006), Helichrysum argyrosphaerum in sheep and goats (Van der Lugt et al 1996), beside Ornithogalum saundersiae and O. prasinum in bovines (Van der Lugt 2002). In these intoxications, electronic microscopic studies have shown that the lesion is a consequence of intramyelinic oedema of the white substance (Van der Lugt 2002;Riet-Correa et al 2005;Raffi et al 2006).…”
Section: Discussionmentioning
confidence: 99%
“…(Tokarnia et al 1989, Stolf et al 1994, Stigger et al 2001, Garcia y Santos et al 2004, Raffi et al 2004, Riet-Correa et al 2005, Raffi et al 2006, Carvalho et al, 2006 permite concluir que ambas as plantas têm um princípio ativo semelhante ou pelo menos com similar ação biológica, razão pela qual os resultados de ambas as intoxicações podem ser discutidas em conjunto. As lesões neurológicas observadas nos animais dos 3 grupos foram aparentemente mais discretas quanto mais tempo transcorreu entre o fim da administração da planta e a eutanásia (Quadro 2) sugerindo que há regressão dessa lesão.…”
Section: Discussionunclassified
“…Tem sido demonstrado em trabalhos de reprodução experimental realizados em bovinos e ovinos que as diferentes apresentações clínicas variam de acordo com a quantidade de A. glazioviana administrada e com o perío-do de ingestão da planta (Stolf et al 1994, Stigger et al 2001, Garcia y Santos et al 2004, Raffi et al 2006.…”
Section: Introductionunclassified
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“…que exibiam sinais clínicos de insuficiência cardíaca, e mais tarde também em ovinos intoxicados por T. multiglandulosa (Riet-Correa et al 2005, Carvalho et al 2006, Cardinal et al 2010, bem como aquela demonstrada em bovinos e ovinos, que manifestam uma síndrome letárgica, após a ingestão de altas doses de Ateleia glazioviana , Stigger et al 2001, Raffi et al 2004. Estudos recentes por microscopia eletrônica compro-varam que a espongiose do sistema nervoso é causada por edema intramielínico (Riet-Correa et al 2005), semelhante ao que ocorre na intoxicação por A. glazioviana (Raffi et al 2006).…”
Section: Achados Histopatológicosunclassified