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Anatomia, Histologia, Embryologia

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https://www.readbyqxmd.com/read/30014509/immunohistochemical-study-of-ki-67-protein-androgen-receptor-and-estrogen-receptor-beta-in-testicular-tissues-of-male-pigs-immunocastrated-with-different-times-of-gnrh-vaccination
#1
Kongkiat Srisuwatanasagul, Nawarus Prapaiwan, Sayamon Srisuwatanasagul, Annop Kunavongkrit, Atthaporn Roongsitthichai
This study aimed to investigate the immunoexpression of Ki-67 protein, androgen receptor (AR), and estrogen receptor beta (ERβ) in testicular tissues of male pigs immunocastrated using GnRH vaccine (Improvac™, Zoetis Co., Ltd., Thailand) with different times. Totally, 30 male pigs were classified by castration protocol into three groups: T1 (n = 10) consisted of pigs immunocastrated at 14 and 18 weeks of age, T2 (n = 10) included pigs immunocastrated at 9 and 19 weeks of age, and C (n = 10) contained intact pigs...
July 16, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/30014496/oogenesis-is-accompanied-by-cyclic-morphological-changes-in-hepatocytes-of-neotropical-freshwater-fish-piabina-argentea
#2
Ralph G Thomé, Isabella Cristina de Oliveira Cardoso, Sabrina Elisa de Oliveira, Hélio Batista Dos Santos
We determined for the first time the reproductive biology of Piabina argentea through macroscopic and microscopic analysis of ovaries and evaluated the morphological changes in hepatocytes. Two hundred and 46 specimens were collected, 204 females and 42 males, between March 2014 and February 2015. Biometrics data were obtained. From females, gonad and liver samples were conducted to histological, histochemical and immunohistochemical techniques. Mature ovaries were used to determine absolute and relative fecundity...
July 16, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29998584/comparative-histomorphological-and-ultrastructural-study-of-the-luminal-epithelium-of-the-isthmus-in-laying-and-moulting-domestic-fowls-gallus-domesticus
#3
Mike M Mpango, Mary-Cathrine Madekurozwa
This study describes ciliated, nonciliated and mitochondrial luminal epithelial cells of the isthmus in laying and moulting domestic fowls using histological and ultrastructural techniques. The ciliated cells were nonsecretory, while numerous electron-dense secretory granules were present in the nonciliated cells of laying birds. Mitochondrial cells, occurring in two morphologically distinct forms, constituted the third type of epithelial cell present in the isthmus. The SEM study showed that the luminal epithelium was dominated by ciliated cells, the cilia of which partially obscured adjacent nonciliated cells...
July 11, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29998487/presence-and-distribution-of-leptin-and-its-receptor-in-the-gut-of-adult-zebrafish-in-response-to-feeding-and-fasting
#4
Olivia Garcia-Suarez, Roberto Cabo, Francesco Abbate, Basilio Randazzo, Rosaria Laurà, Giuseppe Piccione, Antonino Germanà, Maria Levanti
Leptin is an anorectic hormone secreted mainly by peripheral adipocytes but also by other central and peripheral tissues. It acts by means of a receptor called OB-R, influencing not only appetite and body mass but being also involved in many fields like endocrinology, metabolism and reproduction. Immunohistochemistry and qRT-PCR techniques were, respectively, used to demonstrate the presence of leptin and its receptor in the gut of adult zebrafish and to evaluate the leptin gene expression response to feeding and fasting...
July 11, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29978506/lipid-droplets-in-clusters-negatively-affect-bos-indicus-embryos-during-cryopreservation
#5
Eva Patricia López-Damián, José Alfredo Jiménez-Medina, Miguel Angel Lammoglia, Jaime Arturo Pimentel, Lourdes Teresa Agredano-Moreno, Chris Wood, Carlos Salvador Galina, Tatiana Fiordelisio
Embryo transfer using cryopreserved B. indicus embryos results in low pregnancy rates. The low viability of B. indicus embryos is likely a result of their low freezability relative to embryos from other species, notably B. taurus. Freezability is probably related to the quantity of lipid droplets in the embryonic cells. However, the mechanism underlying this association is unknown. Using multiphoton and transmission electron microscopy, the proportion, volume, morphology and composition of lipid droplets in fresh and cryopreserved B...
July 5, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29947026/computer-assisted-analysis-of-tongue-thickness-of-golden-hamster-mesocricetus-auratus-following-topical-chronic-exposure-to-distilled-alcoholic-beverages
#6
Rafaela N Moreira, Sandra A Marinho, Flaviana D Verli, Dhelfeson W Douglas-de-Oliveira, Ana Terezinha Mesquita, Nádia L Lima
The aim of this study was to measure changes in epithelial thickness in the lingual mucosa of golden hamsters submitted to the topical application of distilled alcoholic beverages. Forty golden hamsters were randomly divided into: Group 1-cachaça 48° GL and Group 2-whisky 40° GL. Alcohol was applied to the right side of the tongue, the left side served as control. Seventy microscopic fields were evaluated. The data were submitted to descriptive statistics, the Wilcoxon test and the Mann-Whitney U test (p < 0...
June 26, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29943437/skeletal-unit-construction-of-rat-mandible-based-on-the-masticatory-muscle-anatomy-and-double-microcomputed-tomography
#7
Hak-Jin Kim, Kyeong-Mee Park, Hye-Jin Tak, Ji Wook Choi, Sang-Hoon Kang, Wonse Park, Helios Bertin, Pierre Corre, Sang-Hwy Lee
This study aimed to divide the mandible into skeletal units based on three-dimensional (3D) muscular anatomy with microcomputed tomography (micro-CT) of Sprague-Dawley rat. Five normal rats were micro-CT scanned at 12 weeks of age before and after contrast enhancements for the masticatory muscles. Three-dimensional reconstruction of the mandible was performed from the initial micro-CT images, followed by segmentation of the masticatory muscles using the second enhanced micro-CT data. Bone and muscle models were superimposed based on the teeth and bony structures to evaluate muscular orientation and attachment...
June 25, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29888399/localization-of-the-motor-neuron-somata-of-geniohyoid-muscle-in-rat-a-horseradish-peroxidase-study
#8
Aimi Nadia Binti Razlan, Muzammil Ullah, Marina Yurievna Kapitonova, Norhayati Binti Liaqat Ali Khan, Syed Baharom Syed Ahmad Fuad
The aim of the study was to investigate the location of motor neuron somata of geniohyoid muscle in rat. Nine Sprague-Dawley rats were used in this study. Operations were performed under general anaesthesia. Nembutal sodium, 40 mg per kg intraperitoneally was used for anaesthesia. 0.02 to 0.05 ml of 30% horseradish peroxidase (Sigma Type VI) solution in normal saline was injected into the exposed right geniohyoid muscle. After 48 hr, the animals were fixed by perfusion through left ventricle of heart, first by 100 ml normal saline and then with 500 ml of 1...
June 11, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29877576/morphological-study-of-the-hard-palate-in-the-egyptian-goats-capra-hircus-a-scanning-electron-microscopic-study
#9
Mohamed A A Mahdy, Kamal E H Abdalla, Salma A Mohamed
The aim of this study was to investigate the morphology of the goat hard palate by light and scanning electron microscopy (SEM), in addition to gross and morphometric analysis. A total of twelve goat heads, from normal adult and apparently healthy goats of both sexes, were collected from local slaughterhouses in Qena province, Egypt. Samples were subjected to gross examination, morphometric analysis, light microscopy and SEM. The hard palate in the goats was long and could be divided into a rostral narrow part and a caudal wide part with about 12-15 transverse palatine ridges from which the rostral palatine ridges were serrated on their free caudal edges...
June 7, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29862553/identification-of-irisin-immunoreactivity-in-porcupine-hystrix-cristata-adrenal-glands-and-kidneys
#10
Sema Timurkaan, Fatih M Gür, Berrin Gençer Tarakçı, Mehmet H Yalçın, Mustafa Girgin
Irisin, a novel peptide, was initially been shown to be expressed explicitly in the muscle tissues. We studied the presence of irisin immunoreactivity in porcupine adrenal glands and kidneys. Immunocytochemistry showed that irisin was localised both in the adrenal cortex and adrenal medulla. In organs, irisin immunoreactivity was found in the tubular and collecting system of the nephron. The functional role of irisin in the adrenal gland and kidney has not been precisely yet. However, irisin might have a paracrine and autocrine function as do other locally produced peptides...
June 3, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29862544/hindlimb-bone-maturation-during-postnatal-life-in-the-greater-rhea-rhea-americana-aves-palaeognathae-implications-for-palaeobiological-and-zooarchaeological-interpretations
#11
Mariana B J Picasso, Claudio Gustavo Barbeito
The objective of this study was to study the morphological pattern of bone maturation of the hindlimb bones of Rhea americana and find out how it can affect bone morphology after a taphonomic process. Juvenile specimens (n = 10) ranging from one month old to eight months old were studied. For comparison, bones from adults and juveniles from museum specimens (n = 4 and n = 6, respectively) were studied. In fresh bones, ossification centres were identified in the proximal and distal epiphyses of the tibiotarsi and in the proximal epiphysis of the tarsometatarsi, whereas the distal region of the femora and tarsometatarsi showed abundance of cartilage...
June 3, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29862543/ultrastructure-of-the-tubular-glands-in-the-isthmus-region-of-the-oviduct-in-laying-and-natural-moulting-commercial-egg-type-chickens
#12
Mary-Cathrine Nyasha Madekurozwa, Mike M Mpango
The study investigated the ultrastructural characteristics of tubular gland and duct cells, as well as luminal gland cells in the isthmus region of the oviduct of laying and natural moulting hens. Tubular glands in laying birds were composed of type 1 and 2 cells. Based on the preponderance of each cell type, in relation to the location of a developing egg in the oviduct of the domestic fowl, these gland cells may represent different functional states of the same cell. The findings of the study on natural moulting birds suggest that autophagy is a process confined to the early stages of degeneration, while necrosis occurs in the terminal stages...
June 3, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29797425/intracranial-extraneural-ectopic-lymph-node-in-a-bovine-bos-taurus
#13
Chad S Clancy, Arnaud J Van Wettere, Gordon A Hullinger
The brain from a field necropsied 8-month-old feedlot heifer presenting with an acute history of depression, lethargy, dyspnoea and anorexia was evaluated grossly and by histopathology. The meninges overlying the left cerebral hemisphere contained a 12 × 26 × 32 mm, dark red, soft, ovoid mass. Histologic examination of this tissue revealed a well-organized lymph node with normal architecture. Organization of reactive lymphoid tissue resembling normal lymph node architecture may occur under chronic stimulation...
May 23, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29797354/sperm-nuclear-protamines-a-checkpoint-to-control-sperm-chromatin-quality
#14
REVIEW
Klaus Steger, Rod Balhorn
Protamines are nuclear proteins which are specifically expressed in haploid male germ cells. Their replacement of histones and binding to DNA is followed by chromatin hypercondensation that protects DNA from negative influences by environmental factors. Mammalian sperm contain two types of protamines: PRM1 and PRM2. While the proportion of the two protamines is highly variable between different species, abnormal ratios within a species are known to be associated with male subfertility. Therefore, it is more than likely that correct protamine expression represents a kind of chromatin checkpoint during sperm development rendering protamines as suitable biomarkers for the estimation of sperm quality...
May 23, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29774950/morphology-and-quantification-of-sheep-pineal-glands-at-pre-pubertal-pubertal-and-post-pubertal-periods
#15
Durmuş Bolat, Aytül Kürüm, Sıla Canpolat
The pineal gland is a neuroendocrine organ associated with photoperiodic regulation in mammals. The aim of this study was to evaluate the pineal gland at the pre-pubertal, pubertal and post-pubertal periods by means of morphology and stereology. The study examined at total of 24 ovine pineal glands collected from healthy female Akkaraman breed. Thick sections (40 μm) were cut and treated with synaptophysin. Following each thick section, six consecutive sections at a thickness of 5 μm were cut. Each thin section was stained with one of the following dyes: Crossman's modified triple dye, glial fibrillary acidic protein (GFAP), melatonin marker, periodic acid-Schiff, Von Kossa and AgNOR...
May 18, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29761545/comparison-of-the-large-muscle-group-widths-of-the-pelvic-limb-in-seven-breeds-of-dogs
#16
Seyyid Said Sabanci, Mehmet Kamil Ocal
Orthopaedic diseases are common in the pelvic limbs of dogs, and reference values for large muscle groups of the pelvic limb may aid in diagnosis such diseases. As such, the objective of this study was to compare the large muscle groups of the pelvic limb in seven breeds of dogs. A total of 126 dogs from different breeds were included, and the widths of the quadriceps, hamstring and gastrocnemius muscles were measured from images of the lateral radiographies. The width of the quadriceps was not different between the breeds, but the widths of the hamstring and gastrocnemius muscles were significantly different between the breeds...
May 14, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29736911/morphofunctional-description-of-mucous-cells-in-the-gills-of-the-arapaimidae-arapaima-gigas-cuvier-during-its-development
#17
C A Ramos, O T F da Costa, W L P Duncan, M N Fernandes
The gill structure of the Amazonian fish Arapaima gigas (Cuvier 1829) shows ontogenetic changes during development, particularly due the transition from the aquatic to the obligatory air breathing mode of respiration. However, three main cell types can be found in the gills: mitochondrial rich cells, pavement cells and mucous cells (MCs). The MCs are involved in the secretory pathway. The functions of the secreted molecules include mechanical protection of epithelia, protection against parasites and bacterial infection, and role on ion regulation...
May 7, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29888468/a-morphometric-and-stereological-study-on-cervical-spinal-cord-segment-of-goose
#18
Gamze Çakmak, Hüseyin Karadağ, Murat Cetin Ragbetli, Serkan Yildirim, Osman Yilmaz
In this study, volume density of white matter and grey matter areas of cervical segment of spinal cord in adult geese weighing 3-4 kg was examined using stereological methods. 10 geese were used as material without sex discrimination. All animals underwent perfusion with 10% buffered formaldehyde. Following the perfusion, animals were kept in 10% formaldehyde for 1 week. Geese were then dissected. Cervical area of spinal cord was revealed removing cervical spine. Tissue samples were obtained from each segment of cervical area...
August 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29869399/morphology-of-the-oligoryzomys-nigripes-respiratory-system
#19
Lara Carolina Mario, Jéssica Borghesi, Rafael G Hayashi, Phelipe O Favaron, Marcio N Rodrigues, Rafael C Carvalho, Maria A Miglino
Rodents are important in the transmission of infectious diseases that affect the respiratory tract, including simple infections and those caused by specific pathogens. These animals are natural reservoirs of zoonoses that cause many public health diseases. Basic knowledge on the morphology of these animals is important as basic research is useful for applied studies, such as the development of clinical, therapeutic, surgical and clinical models. Morphological data of respiratory tract in Oligoryzomys nigripes are absent in the literature...
August 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29862549/morphological-description-of-male-genital-organs-of-marca-s-marmoset-mico-marcai
#20
Gustavo Henrique Lima de Siqueira, Felipe Ennes Silva, Marcelo Ismar Silva Santana
Morphological characterisation of the genital organs of primates may bring significant contributions to the understanding of different reproductive behaviours and support new conservation strategies. However, relevant or detailed descriptions of genital morphology of several primate species are still lacking. This study describes the gross and microscopic anatomy of the internal and external genitalia of Marca's marmoset (Mico marcai). The same organs described in other primate species were identified here, but some anatomical particularities were detected, such as absence of a dartos tunic, presence of a vas deferens ampulla, absence of spongious erectile tissue in the pelvic urethra, separation of prostate gland lobes by a longitudinal sulcus and lack of septation in the corpus cavernosus and spongiosus at the level of the shaft and free portion of the penis...
August 2018: Anatomia, Histologia, Embryologia
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