Structural Biology, Anatomy, Physiology, Animal Science and Zoology
8
Scopus Publications
Scopus Publications
Morphological analysis of air sacs in red-winged tinamou (Rhynchotus rufescens Temminck, 1815) Katia Aparecida da Silva Viegas, Karina Padula, Eduardo Henrique Martins, Luiz Eduardo Cruz dos Santos Correia, Josineudson Augusto II de Vasconcelos Silva, et al. Ciencia Animal Brasileira, 2024 Anatomical descriptions of partridges’ air sacs of the species Rhynchotus rufescens are scarce. This study aimed to evaluate the air sacs of this species. Ten cadaveric specimens of adult partridges, approximately 1 year old, were collected, and latex perfusion was used to solidify the material. The cervical air sac of a red-winged tinamou is smaller and has a more irregular conformation than other air sacs. The thoracic air sacs are symmetrical, and the cranial thoracic air sacs are smaller than the caudal ones. The abdominal air sacs are asymmetrical, and the largest ones extend themselves to the cloaca. Only one clavicular air sac was found, with three subdivisions: right, left, and medial. Additionally, right and left extrathoracic portions were found, passing under the clavicle. In one of the animals, the latexfilled humeri were found, and in three other ribs, vertebral diverticula were present. There is no clear relationship between taxonomy and biology versus the quantity and conformation of air sacs, because different animals with taxonomic proximity present differences. This study enhances species-specific anatomical knowledge of this species of partridge.
An uncommon anatomic variation of the sartorius muscle in a domestic dog (Canis lupus familiaris) Katia Aparecida da Silva Viegas, Jessica Leite Fogaça, Adriane Lauro Nunes, Rodrigo Leal, Ellen Satilio da Silva, et al. Acta Scientiarum Biological Sciences, 2023 The sartorius muscle is located in the pelvic limb of the dog and is divided into a cranial and caudal part. There is no report describing of the three parts of the sartorius muscle. The aim of the present report was to describe the presence of a third part of the sartorius muscle in a dog. Although it does not represent a malformation, it is an important anatomical variation to consider for didactic purposes of dissection and in surgeries of the pelvic limb, as in this case there is a need to move the muscles apart to maintain their integrity. Furthermore, this anatomical description is relevant for comparative purposes in this animal species.
Increase in vascular injury of sodium overloaded mice may be related to vascular angiotensin modulation Cintia Taniguti Lima, Juliane Cristina de Souza Silva, Katia Aparecida da Silva Viegas, Thais Cristina de Souza Oliveira, Rariane Silva de Lima, et al. Plos One, 2015 This study aimed to analyzing the effect of chronic sodium overload upon carotid and femoral injury, and its relation to vascular angiotensin modulation. Male C57Bl6 mice were divided in: control (cont), receiving 1% NaCl solution for 2 weeks (salt-2) or 12 weeks (salt-12). Two-weeks before the end of the study, a 2mm catheter was implanted around the left femoral and carotid arteries to induce injury. Blood pressure (BP) and heart rate (HR) were measured at the end of the study by tail plethysmography. Arteries were collected and prepared for histological analysis to determine arterial thickening and perivascular collagen deposition. Angiotensin II and Ang(1-7) were quantified in fresh arteries using the HPLC method. There were no differences in body weight, BP and HR. Intima/media ratio had a similar increase in both injured arteries of cont and salt-2 mice, but a more pronounced increase was observed in salt-12 mice (31.1±6%). On the other hand, sodium overload modified perivascular collagen deposition, increasing thick fibers (cont: 0.5%; salt-2: 3.4%; salt-12: 0.6%) and decreasing thin fibers (cont: 7.4%; salt-2: 0.5%; salt-12: 6.8%) in non-injured arteries. Injured arteries presented similar collagen fiber distribution. Angiotensin quantification showed increased Ang(1-7) in salt treated mice (salt-2: +72%; salt-12: +45%) with a concomitant decrease in Ang II (salt-2: -54%; salt-12: -60%). Vascular injury increased significantly Ang(1-7) in salt-12 mice (+80%), maintaining Ang II reduction similar to that of a non-injured artery. The lack of changes in BP and HR suggests that the structural changes observed may be due to non-hemodynamic mechanisms such as local renin-angiotensin system. Collagen evaluation suggests that sodium overload induces time-related changes in vascular remodeling. The increase of artery injury with concomitant increase in Ang(1-7) in 12-week treated mice shows a direct association between the duration of salt treatment and the magnitude of vascular injury.
Effects of moderate exercise on the biochemical, Physiological, morphological and functional parameters of the aorta in the presence of Estrogen deprivation and dyslipidemia: An experimental model Claudia Marchon, Elisabete de Marco Ornelas, Katia Aparecida da Silva Viegas, Silvia Lacchini, Romeu Rodrigues de Souza, et al. Cellular Physiology and Biochemistry, 2015 Background: The estrogen deficiency, abnormal lipid profile, weight gain and a sedentary lifestyle are factors associated with the increased prevalence of cardiovascular disease in menopausal women. However, physical exercise practice reduces some of these risk factors. Moreover, it has been shown that exercise has an impact on inflammation, in sympathetic activity and improves endothelial function. Aims: The present study aims to evaluate the effects of moderate aerobic training on biochemical, morphological and physiological parameters in LDL Knockout mice with estrogen deprivation, evaluating the components of the ascending aortic wall. Methods: The animals were randomly divided into six groups (n=5): sedentary control (SC), sedentary control ovariectomized (SCO), trained control ovariectomized (TCO), LDL-Knockout sedentary (KS), LDL-Knockout sedentary ovariectomized (KOS) and LDL-Knockout trained ovariectomized (KOT). The trained groups underwent a protocol of moderate training for 4 weeks on a treadmill with speed and progressive load. After training, blood samples were collected for biochemical assessments and the aorta was removed for dissection and histological morphometry study. In addition, the expression of angiotensin-converting enzyme (ACE) and angiotensin II proteins were examined by immunohistochemistry in all groups of animals. Results: Changes of expressions of ACE and angiotensin II were found when the group was subjected to exercise. The concentrations of cholesterol and triglycerides were lower in the groups of animals with estrogen deprivation and dyslipidemia. In animals that performed exercises we found significant increase (p<0.05) in Vv[lam]; decrease in Vv[col] and CWT, and a tendency for decrease both in TS and IMT when compared to the SC groups. The histological morphometry findings showed consistency in the results of the aorta study when the ovariectomized group underwent the exercise protocol. Conclusion: We conclude that physical training contributed to reducing vessel rigidity and to improvements in vascular compliance, with the increase in volume density of elastic lamellae in the estrogen-deprived groups who had normal cholesterol levels.
Seasonal study quail's vas deferens of Italian variety: Morphology and histomorphometry Katia Aparecida da Silva Viegas, Antonio Marcos Orsi, Karina Simões Brazilian Journal of Veterinary Research and Animal Science, 2006 No outono o ducto deferente de codorna da variedade Italiana foi observado como um ducto simples, delgado e retilíneo em toda a sua extensão. Assim sendo, secções histológicas transversais deste ducto mostraram-no com forma circular, sendo revestido por epitélio pseudoestratificado cilíndrico que forma pregas longitudinais. Essas pregas adentravam o lúmen tubular, que aparecia freqüentemente vazio de espermatozóides. Porém, no inverno, primavera e verão a aparência morfológica do ducto deferente era a de um túbulo grandemente enovelado. Logo, cada secção histológica transversal do ducto deferente, ao longo de toda a sua extensão, mostrava-se estruturada como secções tubulares dispostas paralelamente entre si. Estas secções tubulares apareciam irregulares quanto à forma e variáveis em número, estando interconectadas por tecido conjuntivo frouxo adventicial. Nestas observações no inverno, primavera e verão o lúmen tubular vaso-deferencial estava totalmente preenchido por espermatozóides e fluido seminal. Portanto, pôde-se concluir, inclusive com base em estudo prévio sobre a cinética testicular nesta variedade Italiana de codorna, que a produção de espermatozóides bem como a sua emissão, estocagem e ejaculação através do ducto deferente não cessam ao longo da maior parte do ano, exceto no outono a etapa quiescente do ciclo reprodutivo circum-anual desta ave doméstica.
Ultrastructural characteristics of spermiogenesis in the domestic duck (Anas platyrhynchos) K. Simões, A. M. Orsi, K. A. S. Viegas Journal of Veterinary Medicine Series C Anatomia Histologia Embryologia, 2005 SummaryIn this present study was observed that the spermatids underwent morphological differentiation and modifications, which primarily comprised nuclear elongation, during the process of spermiogenesis in the domestic duck. The acrosome was formed and the flagellum developed concomitantly with nuclear modifications. Thus, various modifications could be observed during this process, especially changes in the distribution of cytoplasmic organelles. Long cisternae of the rough endoplasmic reticulum present in the spermatid cytoplasm dissociated into vesicles and the distal centriole initiated the development of the flagellum in the cellular portion opposite to the acrosome. The ultrastructure of the spermatids of the domestic duck did not show the characteristic development of pre‐acrosomal granules, but the acrosomal granule could be directly visualized in this species.
Structural features of the renal and femoral arteries wall in rabbit (Oryctolagus cuniculus) Acta Scientiarum Biological Sciences, 2004
