Histomorphometrical and histochemical postnatal development of cornea in indigenous rabbits

Altaay, Omar Y.; Al-Haaik, A. G.

doi:10.33899/ijvs.2021.130031.1722

Cited by 2 publications

(2 citation statements)

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“…At the end of gestation, the corneal stroma comprises two layers: the anterior fibroareolar layer and the posterior lamellated fibrous layer. These results are consistent with the findings of Al‐Taey and Al‐Haaik (2022) in one‐day‐old rabbits. We demonstrated that corneal stroma development is completed postnatally.…”

Section: Discussionsupporting

confidence: 92%

Morphogenetic events influencing corneal maturation, development, and transparency: Light and electron microscopic study

Ibrahim

Hifny

Elhanbaly

et al. 2023

Microscopy Res & Technique

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The development of the cornea is a fascinating process. Its dual origin involves the differentiation of surface ectoderm cells and the migration of mesenchymal cells of neural crest origin. This research aimed to demonstrate the morphogenesis of the rabbit cornea from fetal to postnatal life using light‐ and electron microscopy, and immunohistochemical analysis. There were 27 rabbit embryos and nine rabbits used. The rabbit cornea begins its prenatal development on the twelfth day of gestation. The surface ectoderm differentiates into the corneal epithelium on day 13. Intriguingly, telocytes were visible within the epithelium. The secondary stroma develops on the sixteenth day of gestation by differentiation of keratocytes. At the age of 2 weeks, the lamellae of collagenous fibers become highly organized, and the stroma becomes avascular, indicating that the cornea has become transparent. Bowman's membrane appears on day 23 of pregnancy and disappears on day 30. The Descemet's membrane appears at this time and continues to thicken postnatally. The corneal endothelium appears on the twentieth gestational day as double layer of flattened cells and becomes a single layer of cuboidal cells on day 30. The spaces between the endothelial cells resemble craters. VEGF immunohistochemical expression increases over the course of development, reaching its peak in the first week after birth before decreasing in all corneal layers and becoming negative in the stroma. In conclusion, numerous morphogenetic events contribute to corneal maturation and transparency, allowing the cornea to perform its vital functions.

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Section: Discussionsupporting

confidence: 92%

Morphogenetic events influencing corneal maturation, development, and transparency: Light and electron microscopic study

Ibrahim

Hifny

Elhanbaly

et al. 2023

Microscopy Res & Technique

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“…The measurements were taken with a Color digital camera HMDC-5 coupled to an optical microscope. This camera has built-in image analysis software (Scope image-0.9) to collect these measurements (15,16).…”

Section: Samplingmentioning

confidence: 99%

Bioceutical role of nano and organic selenium on certain reproductive value of laying hen during force molting

Al-Fahady¹,

Hameed²

2023

IJVS

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Nanotechnology has proposed many new effective forms of nutritional supplement ingredients due to their low toxicity and high bioavailability, among which are nanoselenium, due to their distinctive properties of small particles and increased surface area of compounds, allowing the opportunity for biological interactions. In this study, 48 laying hens, aged 47 weeks, of a rose type were used, and the experiment lasted for two months. The birds were fed two types of diets, one standard and the other a non-standard diet, represented by the use of crushed yellow corn for molting. The birds were divided into six groups 8 birds/group, with the first group receiving a standard diet, the second group receiving only yellow tops crushed, the third group receiving organic-Se 2 g/L with a standard diet, the fourth group receiving Nano-Se 0.5 ml/L with standard stalk, the fifth group receiving organic-Se with straw 2 g/L, and the sixth group receiving nano-Se with straw 0.5 ml/L. The results showed a significant rise in ovary weight, oviduct weight, number of immature and mature follicles, FSH, LH, as well as an improvement in the histological characteristics of the shell gland in the groups treated with nano and organic-Se, indicating that nano-Se plays a critical role in restoring most reproductive and histological parameters to their normal levels, close to the baseline. This study found that organic and nano-Se are crucial in improving most reproductive and physiological parameters of laying hens exposed to molting.

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Histomorphometrical and histochemical postnatal development of cornea in indigenous rabbits

Cited by 2 publications

References 0 publications

Morphogenetic events influencing corneal maturation, development, and transparency: Light and electron microscopic study

Morphogenetic events influencing corneal maturation, development, and transparency: Light and electron microscopic study

Bioceutical role of nano and organic selenium on certain reproductive value of laying hen during force molting

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