Collateral arteries of the aortic arch of the red‐rumped agouti (Dasyprocta leporina Linnaeus, 1758)

Abstract

Detailed knowledge of the arterial system is an important prerequisite when interpreting experimental data in research, as well as in the diagnosis of cardiovascular disease using imaging techniques such as Doppler echocardiography and contrast radiography. Thus, considering the importance of the aortic arrangement, the objective of this study was to describe the collateral arteries of the aortic arch of agoutis in order to establish the standard model, and therefore contribute to studies involving research related to heart disease, and produce information for a more accurate diagnosis in complementary imaging examinations. In this study, 14 adult animals were used, comprising eight males and six females. The vascular system was washed with 0.9% aqueous saline solution and perfused with Neoprene 450 latex coloured with yellow or red pigment, which was subsequently dissected and analysed. One male animal was used for the digital contrast radiography technique perfused with a liquid barium sulphate solution (Bariogel®) (1 g/ml) and Neoprene 450 latex, both diluted 1/3. The aortic arch of the agouti presented with only the brachiocephalic trunk as collateral branch in all the animals studied. Thus, agouti falls into type 1 for mammalian aortic arch vascular arrangements.

Collateral aortic branches in the collared peccary (Pecari tajacu Linnaeus, 1758)

“…Several studies in the literature have characterized the main arteries that emerge directly from the aortic arch of domestic, wild, and human mammals. Oliveira, Costa, et al (2020), gathered several studies on these groups of animals, and framed them in three different types of vascular arrangements, comprising types 1, 2 and 3. The vascular distribution arrangement in the collared peccary, from which the brachiocephalic trunk and the left subclavian artery arose directly from the aortic arch, has also been reported for other wild animals, such as the white-eared opossum (Didelphis albiventris) (Reckziegel et al, 2003), ocelot (Leopardus pardalis) (Martins et al, 2010), nutria (Myocastor coypus) (Campos et al, 2010), European rabbit (Oryctolagus cuniculus) (Souza et al, 2013), Spix's yellowtoothed cavy (Galea spixii) (Oliveira, Oliveira, Barbosa, et al, 2015; and crab-eating fox (Cerdocyon thous) (Lima et al, 2016), as well as in the domestic pig (Susscrofa domesticus) (Lima et al, 2016).…”

“…Several studies in the literature have characterized the main arteries that emerge directly from the aortic arch of domestic, wild, and human mammals. Oliveira, Costa, et al (2020), gathered several studies on these groups of animals, and framed them in three different types of vascular arrangements, comprising types 1, 2 and 3. Based on this classification, the collared peccaryvascular arrangements is classifiedas type 2, characterized by the appearance of two arteries, the first constituted by the brachiocephalic trunk and the second, by the left subclavian artery.…”

“…The type 1 aortic arch vascular arrangement, in which the brachiocephalic trunk is the only collateral branch, has been previously described in other mammals, such as white buffalo ( Bubalus bubalis ) (Cortellini et al, 2000), horse ( Equus ferus caballus ) (Dyce et al, 2004), cattle ( Bos taurus ) (Dyce et al, 2004), brown brocket ( Mazama gouazoubira ) (Schimming et al, 2012), capybara ( Hydrochoerus hydrochaeris ) (Culauet al, 2007) and red‐rumpedagout ( Dasyprocta leporina ) (Oliveira, Costa, et al, 2020). This anatomical model may imply in head and thoracic limb oxygenation, in which the brachiocephalic trunk is the only collateral aortic arch branch responsible for the transport of oxygenated blood from the heart, and its obstruction could cause death (Oliveira, Costa, et al, 2020).…”

Abdominal aortic branches of red‐rumped agouti (Dasyprocta leporina Linnaeus, 1758)

“…These zootechnical characteristics have aroused scientific interest in this species, which has favoured morphological research, contributing to information on red‐rumped agouti biology and expanding knowledge for its rational and sustainable production (Araújo Júnior et al, 2019). In this context, several morphological studies concerning the red‐rumped agouti have been conducted, especially regarding its cardiovascular system, such as investigations on the arterial vascularisation of the base of the brain (Silva et al, 2016) and collateral branches of the aortic arch (Oliveira et al, 2020). These studies are paramount in interpreting cardiovascular disease diagnoses through imaging techniques, such as Doppler echocardiography and contrast radiography (Cabral et al, 2010; Diniz et al, 2017; Oliveira et al, 2018; Oliveira et al, 2020).…”

“…on red-rumped agouti biology and expanding knowledge for its rational and sustainable production (Araújo Júnior et al, 2019). In this context, several morphological studies concerning the red-rumped agouti have been conducted, especially regarding its cardiovascular system, such as investigations on the arterial vascularisation of the base of the brain (Silva et al, 2016) and collateral branches of the aortic arch (Oliveira et al, 2020). These studies are paramount in interpreting cardiovascular disease diagnoses through imaging techniques, such as Doppler echocardiography and contrast radiography (Cabral et al, 2010;Diniz et al, 2017;Oliveira et al, 2018;Oliveira et al, 2020).…”