Morphometric and immunohistochemical study of the reticulum of red deer during prenatal development

Franco, A; Redondo, E.; Masot, A. J.

doi:10.1111/j.0021-8782.2004.00329.x

Cited by 14 publications

(55 citation statements)

References 19 publications

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“…Also, outer layer of optic cup which forms external part of retina has small pigmented granules and seen as a dark pigmented layer. In human fetus the optic vesicle moves to internal part and forms a two-layer cup on its 42-day old 15 . At first there is a space between these two layers but the space disappears after a short time and the two layers of cup appose each other 16 .…”

Section: Discussionmentioning

confidence: 99%

A Study of The Histogenesis of Sheep Fetus Iris

Saadatlou¹,

Tavousi²,

Keyhanmanesh³

2013

Kafkas Univ Vet Fak Derg

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SummaryIn this study, for determination of histogenesis of iris in sheep, 32 samples of sheep fetuses at different and certain ages were used. After sample preparation and fixation, their age were determined and histological and anatomical studies were done. In histological studies, the H&E staining and two other specific staining (verhoeff and Masson's Trichrome) were used. Obtained results demonstrated that a two-layered cup formed in first month but iris separation from the anterior and ceca part of retina occurred in second month. The separation of iris from ciliary body was completed in third month. From the beginning of third month, the iris formed changes and its circular shape changed to oval form so that its internal angle was larger than its external angle and this condition was retained until the end of pregnancy. General shape of pupil conformed to general shape of iris. It was histologically revealed that iris was formed from the anterior part of the optic cup just at the connection place of outer and inner layers in second month and thereafter a part of superficial ectoderm and choroid was added to it. The first signs of elastic fibers in iris as well as smooth muscles appearance were significant in second month. The posterior cells are pigmented from the beginning of the iris cell formation. Anterior epithelial tissue of the iris was simple squamous and two layer cuboidal cells formed its posterior epithelium which were stabilized in third month. The number of collagen and elastic fibers and smooth muscles and their size increase with age. Keywords: Iris, Sheep fetus, Histogenesis Koyun Fetus Irisinin Histogenesisi Üzerine Bir Çalışma ÖzetBu çalışmada, koyunlarda iris histogenezinin belirlenmesi için farklı ve belirli yaşlarda 32 adet koyun fetus örneği kullanıldı. Numune hazırlama ve tesbit sonrası, yaş durumları belirlenerek histolojik ve anatomik çalışmalar gerçekleştirildi. Histolojik çalışmalarda, H & E boyama ve diğer iki spesifik boyama (Verhoeff ve Masson's Trichrome) kullanıldı. Elde edilen sonuçlar, iki katmanlı çanak formasyonunun ilk ayda oluşmasına rağmen retinanın anterior ve ceca bölümlerinden iris ayrılmasının ikinci ayda meydana geldiğini gösterdi. İrisin siliyer cisimden ayrılması üçüncü ayda tamamlandı. Üçüncü ayın başından itibaren, iris değişiklikleri oluşmuş ve onun iç açısının dış açısından daha büyük olabilmesi için sirküler şekli oval forma değiştiği ve bu durumun gebeliğin sonuna kadar muhafaza edildiği gözlemlendi. Pupilin genel şekli iris genel şekli ile uyumlu bulundu. Histolojik olarak ortaya çıkan bulguda, iris ikinci ayda dış ve iç katmanların bağlantı yerindeki optik çanağın anterior bölümünü oluşturduğu ve bundan sonra yüzeysel ektodermin bir kısmının ve koroidin buna eklendiği belirlendi. Iris elastik liflerinin yanı sıra düz kasların görünümünün ilk belirtileri ikinci ayda anlamlı bulundu. Posterior hücreler iris hücre formasyonu başlangıcından itibaren pigmentli halde gözlemlendi. Irisin anterior epitel dokusu, üçüncü ayda stabilize olan onun posterior epitelin...

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Section: Discussionmentioning

confidence: 99%

A Study of The Histogenesis of Sheep Fetus Iris

Saadatlou¹,

Tavousi²,

Keyhanmanesh³

2013

Kafkas Univ Vet Fak Derg

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“…The present study on the histological organization of the abomasum of deer during prenatal development is as a continuation of earlier work carried out on the development of the rumen, reticulum and omasum of red deer during intrauterine life (Franco et al. 2004a,b; Redondo et al. 2005).…”

Section: Introductionmentioning

confidence: 58%

“…1996), and it completes a series of investigations on the prenatal development of the stomach in red deer (Franco et al. 2004a,b; Redondo et al. 2005).…”

Section: Introductionmentioning

confidence: 87%

Morphometric and immunohistochemical study of the abomasum of red deer during prenatal development

Masot¹,

Franco

Redondo³

2007

Journal of Anatomy

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The red deer is well suited to scientific study, given its economic importance as an animal to be hunted, and because it has a rich genetic heritage. However, there has been little research into the prenatal development of the stomach of ruminants in general, and none for the red deer. For this reason, we undertook histological evaluation of the ontogenesis of the abomasum in red deer. Histomorphometric and immunohistochemical analyses were carried out on 50 embryos and fetuses from the initial stages of prenatal life until birth. The animals were divided for test purposes into five experimental groups: group I [1.4-3.6 cm crown-rump length (CRL); 30-60 days, 1-25% of gestation]; group II (4.5 -7.2 cm CRL; 67-90 days, 25 -35% of gestation); group III (8 -19 cm CRL; 97-135 days, 35 -50% of gestation); group IV (21-33 cm CRL; 142-191 days, 50-70% of gestation) group V (36-40 cm CRL; 205-235 days, 75 -100% of gestation). In the organogenesis of the primitive gastric tube of red deer, differentiation of the abomasum took place at 67 days, forming a three-layered structure: the epithelial layer (pseudostratified), pluripotential blastemic tissue and serosa. The abomasal wall displayed the primitive folds of the abomasum and by 97 days abomasal peak areas were observed on the fold surface. At 135 days the abomasal surface showed a single mucous cylindrical epithelium, and gastric pits were observed in the spaces between abomasal areas. At the bottom of these pits the first outlines of glands could be observed. The histodifferentiation of the lamina propriasubmucosa, tunica muscularis and serosa showed patterns similar to those described for the forestomach of red deer. The abomasum of red deer during prenatal life, especially from 67 days of gestation, was shown to be an active structure with full secretory capacity. Its histological development, its secretory capacity (as revealed by the presence of neutral mucopolysaccharides) and its neuroendocrine nature (as revealed by the presence of positive non-neuronal enolase cells and the neuropeptides vasoactive intestinal peptide and neuropeptide Y) were in line with the development of the rumen, reticulum and omasum. Gastrin-immunoreactive cells first appeared in the abomasum at 142 days, and the number of positive cells increased during development. As for the number of gastrin cells, plasma gastrin concentrations increased throughout prenatal life. However, its prenatal development was later than that of the abomasum in sheep, goat and cow.

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“…Although there has been considerable research into the organization of the stomach in cattle (Vivo et al, 1990), sheep (Wardrop, 1961;Franco et al, 1992Franco et al, , 1993aFranco et al, , 1993bFranco et al, , 1993cRedondo et al, 1997;Regodon et al, 1996), deer (Franco et al, 2004a(Franco et al, , 2004bRedondo et al, 2005;Masot et al, 2007aMasot et al, , 2007b, and goat (Molinari & Jorquera, 1988;Ramkirshna & Tiwari, 1979;Nwaogu & Ezseaor, 2008;El-Gendy & Derbalah, 2010;Garcia et al, 2012), it is that no reports describing the stomach in the yak have been published previously, the aim of the present study was to describe the morphological and histological features of the yak abomasum and to provide a morphological basis for further research on adaption for the balance of wholebody energy homeostasis in poor grazing in the QinghaiTibetanPlateau, China.…”

Section: Introductionmentioning

confidence: 99%

Histomorphometric Adaptation of Yak (Bos grunniens) Abomasum to the Qinghai-Tibetan Plateau Environment

Wang

Zhang

et al. 2015

Int. J. Morphol.

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SUMMARY: Six abomasums of yaks (Bos grunniens) were studied with gross dissection and histological methods. It was found that the mucosa of the yak abomasum was covered with simple columnar epithelium. There were lots of spiral folds (≥10) in the fundic glandular area. The developed membrane of lamina propria was occupied by high density glands. According to the morphological characteristics of the glands, the abomasum was divided into the cardiac, gastric and pyloric glands. Cardiac glands were curved tubular glands with the intumescent bottom and small glandular cavity. Fundic glands were simple tubular glands or branched tubular glands, where the chief, parietal and mucous neck cells can be observed clearly. Pyloric glands were curled tubular glands, the closer to the deep of the lamina propria, the more obvious the glands curl. Staining of glycoconjugate revealed that the mucosal epithelium of the cardiac gastric and pyloric glands and gastric pits epithelium mainly secreted neutral glycoconjugate, but other portions of cardiac and gastric glands secreted mixed and acid glycoconjugate respectively. By Gordon-Sweet's reticular fiber staining, it was found that the mucous neck cells possessed the characteristic of argyrophilic phenomenon. There was a large number of argyrophilic granules in the supranuclear cytoplasm in contrast with the chief cells. Furthermore, there were isolated lymphoid nodules and diffuse lymphoid tissue in the abomasum glands, especially in corpus abomasi. Grimelius silver staining showed that the argyrophil cells were located in the glandular epithelium and lamina propria of glands, which can also be observed in connective tissue. These endocrine cells dispersed individually in epithelial cells, occasionally in 3-5 cell groups. Therefore, the yaks were grazed throughout the year on diverse natural grassland and had evolved morphological characteristics of the abomasum enabling them to consume a wide variety of plant species, thereby better adapting them to harsh plateau environment.

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Morphometric and immunohistochemical study of the reticulum of red deer during prenatal development

Cited by 14 publications

References 19 publications

A Study of The Histogenesis of Sheep Fetus Iris

A Study of The Histogenesis of Sheep Fetus Iris

Morphometric and immunohistochemical study of the abomasum of red deer during prenatal development

Histomorphometric Adaptation of Yak (Bos grunniens) Abomasum to the Qinghai-Tibetan Plateau Environment

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