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Keywords = six-banded armadillo

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18 pages, 25744 KiB  
Article
Comparative Analysis of Sectional Anatomy, Computed Tomography and Magnetic Resonance of the Cadaveric Six-Banded Armadillo (Euphractus sexcintus) Head
by José Raduan Jaber, Daniel Morales-Bordon, Manuel Morales, Pablo Paz-Oliva, Mario Encinoso, Inmaculada Morales, Natalia Roldan-Medina, Gregorio Ramírez Zarzosa, Alejandro Morales-Espino, Alvaro Ros and Magnolia Maria Conde-Felipe
Vet. Sci. 2025, 12(5), 433; https://doi.org/10.3390/vetsci12050433 - 1 May 2025
Viewed by 562
Abstract
In this research, we examined the head of the six-banded armadillo (Euphractus sexcintus) using advanced imaging techniques, including computed tomography and magnetic resonance imaging, and correlated these findings with the anatomical cross sections. For this, we analyzed three adult specimens. By [...] Read more.
In this research, we examined the head of the six-banded armadillo (Euphractus sexcintus) using advanced imaging techniques, including computed tomography and magnetic resonance imaging, and correlated these findings with the anatomical cross sections. For this, we analyzed three adult specimens. By integrating imaging data with anatomical cross-sections, we present a detailed description of the structures that constitute the head of this species, highlighting its most distinctive features. Therefore, a well-developed tympanic cavity was observed. The masticatory muscles, including the temporalis, masseter, medial, and lateral pterygoid muscles, were adequately delineated. Moreover, the encephalon exhibited characteristics like those of other mammals, with notable development of the olfactory bulbs. This anatomical information may serve as a valuable diagnostic reference for the clinical evaluation of different disorders in the six-banded armadillo, such as cranial malformations, fractures, neurological conditions, and neoplasms. Full article
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13 pages, 3259 KiB  
Article
Characterization of the Population of Ovarian Preantral Follicles in Juvenile Six-Banded Armadillos Infected or Not by Mycobacterium leprae
by Gabriela L. Lima, Andreza V. Brasil, Andreia M. Silva, João Marcelo A. de P. Antunes, Pierre Comizzoli and Alexandre R. Silva
Vet. Sci. 2025, 12(1), 37; https://doi.org/10.3390/vetsci12010037 - 9 Jan 2025
Viewed by 944
Abstract
The objective of this study was to characterize and estimate the population of ovarian preantral follicles in juvenile six-banded armadillos. Pairs of ovaries from five armadillos were collected during a routine epidemiological survey of leprosis (three healthy and two infected females). Ovaries weighed [...] Read more.
The objective of this study was to characterize and estimate the population of ovarian preantral follicles in juvenile six-banded armadillos. Pairs of ovaries from five armadillos were collected during a routine epidemiological survey of leprosis (three healthy and two infected females). Ovaries weighed approximately 0.06 kg, representing a gonadosomatic index of 6.9 ± 0.8%. The mean ovarian follicular population was 15,567.2 preantral follicles per ovarian pair. For most females, follicular population was mainly composed of primordial follicles. No major histological ovarian parameter was affected by M. leprae infection. All females presented high rates of follicular degeneration, regardless of M. leprae infection. In conclusion, we present original particularities regarding the qualitative and quantitative characteristics of the ovarian population of juvenile six-banded armadillos. Full article
(This article belongs to the Section Veterinary Reproduction and Obstetrics)
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16 pages, 17494 KiB  
Article
Correlation between Cross-Sectional Anatomy and Computed Tomography of the Normal Six-Banded Armadillo (Euphractus sexcintus) Nasal Cavity and Paranasal Sinuses
by José Raduan Jaber, Daniel Morales Bordon, Alberto Arencibia, Juan Alberto Corbera, Magnolia Conde-Felipe, Maria Dolores Ayala and Mario Encinoso
Animals 2024, 14(7), 1135; https://doi.org/10.3390/ani14071135 - 8 Apr 2024
Cited by 3 | Viewed by 1631
Abstract
This research aimed to study the rostral part of the head of the six-banded armadillo, applying advanced imaging techniques such as CT. Furthermore, by combining the images obtained through this technique with anatomical cross-sections, an adequate description of the structures that constitute the [...] Read more.
This research aimed to study the rostral part of the head of the six-banded armadillo, applying advanced imaging techniques such as CT. Furthermore, by combining the images obtained through this technique with anatomical cross-sections, an adequate description of the structures that constitute the rostral part of the head of this species is presented. This anatomical information could provide a valuable diagnostic tool for the clinical evaluation of different disorders in the six-banded armadillo’s nasal cavity and paranasal sinuses. Full article
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14 pages, 8950 KiB  
Article
Evidence for Extensive Duplication and Subfunctionalization of FCRL6 in Armadillo (Dasypus novemcinctus)
by Maria Carolina Matos, Ana Pinheiro, Randall S. Davis and Pedro J. Esteves
Int. J. Mol. Sci. 2023, 24(5), 4531; https://doi.org/10.3390/ijms24054531 - 25 Feb 2023
Cited by 2 | Viewed by 2291
Abstract
The control of infections by the vertebrate adaptive immune system requires careful modulation to optimize defense and minimize harm to the host. The Fc receptor-like (FCRL) genes encode immunoregulatory molecules homologous to the receptors for the Fc portion of immunoglobulin (FCR). [...] Read more.
The control of infections by the vertebrate adaptive immune system requires careful modulation to optimize defense and minimize harm to the host. The Fc receptor-like (FCRL) genes encode immunoregulatory molecules homologous to the receptors for the Fc portion of immunoglobulin (FCR). To date, nine different genes (FCRL1–6, FCRLA, FCRLB and FCRLS) have been identified in mammalian organisms. FCRL6 is located at a separate chromosomal position from the FCRL1-5 locus, has conserved synteny in mammals and is situated between the SLAMF8 and DUSP23 genes. Here, we show that this three gene block underwent repeated duplication in Dasypus novemcinctus (nine-banded armadillo) resulting in six FCRL6 copies, of which five appear functional. Among 21 mammalian genomes analyzed, this expansion was unique to D. novemcinctus. Ig-like domains that derive from the five clustered FCRL6 functional gene copies show high structural conservation and sequence identity. However, the presence of multiple non-synonymous amino acid changes that would diversify individual receptor function has led to the hypothesis that FCRL6 endured subfunctionalization during evolution in D. novemcinctus. Interestingly, D. novemcinctus is noteworthy for its natural resistance to the Mycobacterium leprae pathogen that causes leprosy. Because FCRL6 is chiefly expressed by cytotoxic T and NK cells, which are important in cellular defense responses against M. leprae, we speculate that FCRL6 subfunctionalization could be relevant for the adaptation of D. novemcinctus to leprosy. These findings highlight the species-specific diversification of FCRL family members and the genetic complexity underlying evolving multigene families critical for modulating adaptive immune protection. Full article
(This article belongs to the Special Issue Fc Receptors 2.0)
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