scholarly journals Morphological characteristics of interdigital diverticulum (sinus cutaneous interdigitalis) of Dubska Pramenka

2013 ◽  
Vol 29 (3) ◽  
pp. 441-448 ◽  
Author(s):  
R. Avdic ◽  
A. Katica ◽  
N. Mlaco ◽  
A. Softic ◽  
F. Tandir ◽  
...  
Keyword(s):  
Morphological Characteristics ◽  
Hair Follicles ◽  
Domestic Sheep ◽  
Histological Structure ◽  
Anatomical Location ◽  
Pathological State ◽  
Sebaceous Glands ◽  
Anaerobic Microorganisms ◽  
Growth And Reproduction ◽  
The Ideal

Lameness in sheep, especially in semi-extensive breeding of Dubska pramenka, which starts in the interdigital region, was the motive of our morphological and histological research, in order to and in some way, bring the structure of the interdigital sinus in correlation with the appearance of this pathological state that causes extensive economical losses in the domestic sheep breeding,. The anatomical location of the interdigital diverticulum, its histological structure, which point to abundance of sebaceous glands around the hair follicles surrounding the interdigital opening and interdigital glands in deeper layers, point to the suggestion that their secretion increases due to poor hygienic keeping conditions. Pathogens - anaerobic microorganisms, which are most commonly causing the contagious lameness find the ideal conditions for their growth and reproduction because the secretion of these glands is likely "to close" the only "air" communication - interdigital opening.

scholarly journals Morphological characteristics of the skin and hair of clinically healthy dogs and cats

2020 ◽  
pp. 80-84
Author(s):  
O. S. Snopenko ◽  
◽  
O. P. Timoshenko ◽  
A. Y. Ulyanitskaya ◽  
D. V. Kibkalo ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
Morphological Characteristics ◽  
Punch Biopsy ◽  
Hair Follicles ◽  
Domestic Cat ◽  
Domestic Dogs ◽  
Skin Thickness ◽  
Sebaceous Glands ◽  
Histological Characteristics ◽  
Healthy Dogs

The article describes the histological characteristics of the skin of clinically healthy domestic dogs and cats, presents morphometric data on the thickness of the skin, layers of the epidermis, the area of the sebaceous glands and hair follicles; describes sexual and seasonal skin replacements in domestic dogs and cats, common in the east of Ukraine. The material for research is the skin of clinically healthy dogs and cats. Research method is histological. Punch-biopsy of skin fragments was performed in animals on the right from the middle of the lateral surface of the back. Fragments of skin after fixation in 10 % neutral formalin were examined by paraffin, followed by staining of slides with hematoxylin-eosin and by gelatin impregnation, staining with Sudan II, hematoxylin of Karachi. In horizontal and vertical skin sections, the following was investigated: the thickness of the epidermis, papillary and reticular layers, the length and width of the sweat and sebaceous glands, follicle of the hair, the location of hair bundles and the ratio of secondary follicles to primary ones. The histological characteristics of skin and derivatives in dogs and cats have been established. The information obtained from morphometric histostudies indicates significant fluctuations in the values in cats depending on the season; the difference in skin thickness in winter and summer reached 1407 μM and had the same parameters in females and males. The papillary and reticular layers of the dermis correlated with the total skin thickness as 53.9 and 60.3 % in winter and 45.4 and 38.7% in summer, respectively. Epidermal seasonal changes were less significant. The papillary layer of the skin of the domestic cat was more developed than the reticular layer, in contrast to the dogs. The area of the basal sebaceous glands in cats averaged 0.05 mm2 in summer and 0.013 mm2 in winter. In domestic dogs, skin thickness and hair density did not depend on seasonal changes, but on the sex of the animals; in females, the skin was on average 496 + 183 microns thick, and the density was not significantly higher than in males. The area of the sebaceous glands averaged 0,020 mm2 in dog, in cats 0.013 mm2 in summer and in winter – 0.05 mm2.

scholarly journals HISTOLOGICAL STRUCTURE OF THE THORACIC AND ABDOMINAL REGION SKIN OF THE ETAWAH GOATS CROSS BREED

2019 ◽  
pp. 94
Author(s):  
Ni Ketut Suwiti ◽  
Mergayanti Yudanta Eka Putri ◽  
Putu Suastika ◽  
Ni Luh Eka Setiasih ◽  
Luh Gde Sri Surya Heryani ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Stratum Corneum ◽  
Skin Layer ◽  
Hair Follicles ◽  
Histological Structure ◽  
Fatty Tissue ◽  
Sebaceous Glands ◽  
Male And Female ◽  
Thoracic And Abdominal ◽  
Keratin Layer

There have been studies of the histological structure of male and female goat skins. The histological structure and histomorphometry were taken from two region of skin, which is the thorax and abdomen. The Samples were collected from 2-3 years old Etawah goat, and than was stained using a HarrisHematoxilin Eosin method. The data were analysis based on the region and sex.  The results showed that the histological structure of Etawah cross breed consists of three layers were epidermis, dermis, and hipodermis respectively. The epidermis composed by stratum corneum, granulosum, spinosum, and basal. We were found keratin layer on the surface of epidermis. The dermis consists of papillare and reticulare stratum. That was found many sebaceous glands, sudorifera gland, pili muscle, hair follicles, blood vessels, and collagen fibers. The hypodermis layers of Etawah cross breed females skin mostly consists of the fatty tissue, whereas in males we have found thick and horizontally arranged connective tissue. The skin layer on male Etawah cross breed, thorax region thicker than the abdomen. The region and sex may have an effect on the histology structure and histomorphometry of Etawah cross breed skin. 

scholarly journals Interfollicular epidermal stem-like cells for the recreation of the hair follicle epithelial compartment

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Carla M. Abreu ◽  
Rogério P. Pirraco ◽  
Rui L. Reis ◽  
Mariana T. Cerqueira ◽  
Alexandra P. Marques
Keyword(s):  
Hair Follicle ◽  
Cell Sorting ◽  
Dermal Papilla ◽  
Epidermal Keratinocytes ◽  
Sebaceous Glands ◽  
Phenotypic Profile ◽  
Cell Source ◽  
Epithelial Compartment ◽  
The Ideal

Abstract Background Hair follicle (HF) development and growth are dependent on epithelial-mesenchymal interactions (EMIs). Dermal papilla (DP) cells are recognized as the key inductive mesenchymal player, but the ideal source of receptive keratinocytes for human HF regeneration is yet to be defined. We herein investigated whether human interfollicular epidermal keratinocytes with stem-like features (EpSlKCs), characterized by a α6bri/CD71dim expression, can replace human hair follicular keratinocytes (HHFKCs) for the recreation of the HF epithelium and respective EMIs. Methods The α6bri/CD71dim cellular fraction was selected from the whole interfollicular keratinocyte population through fluorescence-activated cell sorting and directly compared with follicular keratinocytes in terms of their proliferative capacity and phenotype. The crosstalk with DP cells was studied in an indirect co-culture system, and EpSlKC hair forming capacity tested in a hair reconstitution assay when combined with DP cells. Results EpSlKCs exhibited a phenotypic profile similar to follicular keratinocytes and were capable of increasing DP cell proliferation and, for short co-culture times, the number of alkaline phosphatase-active cells, suggesting an improvement of their inductivity. Moreover, the recreation of immature HFs and sebaceous glands was observed after EpSlKC and DP cell co-grafting in nude mice. Conclusions Our results suggest that EpSlKCs are akin to follicular keratinocytes and can crosstalk with DP cells, contributing to HF morphogenesis in vivo, thus representing an attractive epithelial cell source for hair regeneration strategies.

scholarly journals Features of the histological structure of the placenta in women with recurrent miscarriage depending on polymorphic variants of the metalloproteinase and hemostasis systems

2020 ◽  
Vol 17 (2) ◽  
pp. 158-169
Author(s):  
T. N. Grinevich ◽  
S. A. Lyalikov ◽  
V. A. Basinsky ◽  
T. T. Shtabinskaya ◽  
C. M. Butolina ◽  
...  
Keyword(s):  
Comparison Group ◽  
Recurrent Miscarriage ◽  
Morphological Characteristics ◽  
Reproductive Function ◽  
Placental Tissue ◽  
Histological Structure ◽  
Chorionic Villi ◽  
Intervillous Space ◽  
Reproductive Losses ◽  
Polymorphic Variants

The article is devoted to the analysis of the morphological characteristics of placental tissue in women with early reproductive losses with recurrent miscarriage, depending on the presence of polymorphic variants of metalloproteinases and hemostasis. It was established that in women with recurrent miscarriage, the area of the trophoblast of the placenta is significantly larger (р < 0.003), the area of the chorionic villi is smaller (р < 0.04) than in the group of women with implemented reproductive function. Thrombosis of the chorionic vessels, necrosis and calcinates in the placenta with PNF were detected in 80.0 % (р = 0.001), 93.3 % (р = 0.001), and 30.0 % (р = 0.049) of cases, respectively, which is significantly higher than in the comparison group. In patients with PNP with the T/T genotype of the 735 C/T polymorphism of the MMP-2 gene, the trophoblast area is significant (р < 0.05) more than with the C/C genotype, acute full-back (р = 0.02) and intervillous hemorrhage (р = 0.02). In women with the C/T genotype of the polymorphism 735 C/T of the MMP-2 gene, edema and dystrophic changes in the chorionic villi, placental necrosis are determined more often (р = 0.02) than with the C/C genotype. In carriers of the T allele of the polymorphism 735 C/T of the MMP-2 gene in the placenta, necrosis is significantly more common than in the CC genotype; the carriage of the T allele is also associated with large values of the relative area of the trophoblast and the stromal-intervillous relation, as well as with a smaller value of the ratio of the intervillous space area to the total area of the photograph.

scholarly journals Structural changes in hair follicles and sebaceous glands of hairless mice following exposure to sulfur mustard

2014 ◽  
Vol 96 (3) ◽  
pp. 316-327 ◽  
Author(s):  
Laurie B. Joseph ◽  
Diane E. Heck ◽  
Jessica A. Cervelli ◽  
Gabriella M. Composto ◽  
Michael C. Babin ◽  
...  
Keyword(s):  
Structural Changes ◽  
Sulfur Mustard ◽  
Hair Follicles ◽  
Sebaceous Glands ◽  
Hairless Mice

scholarly journals Hair Follicle Nevus with Sebaceous Hyperplasia: A Dermoscopic Observation

2015 ◽  
Vol 7 (3) ◽  
pp. 358-362 ◽  
Author(s):  
Kazutoshi Harada ◽  
Yuichiro Kato ◽  
Yukihiko Kato ◽  
Ryoji Tsuboi
Keyword(s):  
Hair Follicle ◽  
Hair Follicles ◽  
Pathological Findings ◽  
Sebaceous Glands ◽  
The Face ◽  
Diagnostic Usefulness ◽  
Well Differentiated ◽  
Histopathological Investigation

We herein report a case of hair follicle nevus, a rare hamartoma found on the face and showing follicular differentiation, which was associated with sebaceous hyperplasia. Dermoscopy of the lesion showed yellow globules surrounded by crown vessels/telangiectasias and scattered tiny hairs. Histopathological investigation revealed hyperplasia of the sebaceous glands and proliferation of well-differentiated vellus hair follicles. These pathological findings were thought to correspond to the yellowish globules and tiny hairs observed under dermoscopy. Hair follicle nevus associated with sebaceous hyperplasia is extremely rare; however, dermoscopic examination can suggest an appropriate diagnosis. The present case proved the diagnostic usefulness of dermoscopy for cutaneous tumors with hair follicular and sebaceous glandular differentiation.

HOW WIGS AND WOMEN’S BEAUTY SUPPLY PRODUCTS MOVE THROUGHOUT THE SUPPLY CHAIN

2018 ◽  
Vol 3 (10) ◽  
Author(s):  
Alexa Green ◽  
Felicia Jefferson
Keyword(s):  
Supply Chain ◽  
Epithelial Cells ◽  
Literature Review ◽  
Hair Loss ◽  
Outer Layer ◽  
Hair Growth ◽  
Review Paper ◽  
Hair Follicles ◽  
Key Factors ◽  
Sebaceous Glands

Everyone wants shine, softness, and hair strength, all key factors in having healthy hair. The purpose of this literature review is to provide information about healthy hair growth. Research states that the hair grows from follicles within the skin. Hair follicles are sacs where hair grows and where the sebaceous glands open. The follicles lined by cells derived from the epidermal. Keratin protects epithelial cells from damage and it makes up the outer layer of human skin. Even though there are many ways you can grow your hair, there are many ways you can lose your hair as well. This review paper also explains disorders that can cause hair loss.

The effects of deformation, ischemia, and reperfusion on the development of muscle damage during prolonged loading

2011 ◽  
Vol 111 (4) ◽  
pp. 1168-1177 ◽  
Author(s):  
S. Loerakker ◽  
E. Manders ◽  
G. J. Strijkers ◽  
K. Nicolay ◽  
F. P. T. Baaijens ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Tissue Injury ◽  
Severe Form ◽  
Anatomical Location ◽  
Pathological State ◽  
Ischemia And Reperfusion ◽  
Damage Development ◽  
Deep Tissue Injury ◽  
Intrinsic Factors ◽  
Prolonged Loading

Deep tissue injury (DTI) is a severe form of pressure ulcer where tissue damage starts in deep tissues underneath intact skin. In the present study, the contributions of deformation, ischemia, and reperfusion to skeletal muscle damage development were examined in a rat model during a 6-h period. Magnetic resonance imaging (MRI) was used to study perfusion (contrast-enhanced MRI) and tissue integrity (T2-weighted MRI). The levels of tissue deformation were estimated using finite element models. Complete ischemia caused a gradual homogeneous increase in T2 (∼20% during the 6-h period). The effect of reperfusion on T2 was highly variable, depending on the anatomical location. In experiments involving deformation, inevitably associated with partial ischemia, a variable T2 increase (17–66% during the 6-h period) was observed reflecting the significant variation in deformation (with two-dimensional strain energies of 0.60–1.51 J/mm) and ischemia (50.8–99.8% of the leg) between experiments. These results imply that deformation, ischemia, and reperfusion all contribute to the damage process during prolonged loading, although their importance varies with time. The critical deformation threshold and period of ischemia that cause muscle damage will certainly vary between individuals. These variations are related to intrinsic factors, such as pathological state, which partly explain the individual susceptibility to the development of DTI and highlight the need for regular assessments of individual subjects.

scholarly journals Role of Androgen on Physiological Function of Pilosebaceous Unit

2021 ◽  
Vol 5 (3) ◽  
pp. 573-579
Author(s):  
Inda Astri Aryani ◽  
Cayadi Sidarta Antonius ◽  
Suroso Adi Nugroho ◽  
Nopriyati
Keyword(s):  
Hair Growth ◽  
Androgen Receptors ◽  
Physiological Function ◽  
Steroid Hormone ◽  
Hair Follicles ◽  
Sebaceous Glands ◽  
Pilosebaceous Unit ◽  
Sebum Production ◽  
Dermal Papillae

The pilosebaceous unit is a sebaceous gland with hair follicles. One of the hormones that affects the pilosebaceous unit is androgen, a steroid hormone that plays an important role in the expression of the phenotype of men and women. Androgen consist of testosterone and dihydrotestosterone which are activated by androgen receptors. Androgen in the pilosebaceous unit affect sebum production and hair growth. Androgen receptors in the sebaceous glands are found on sebocytes and in hair follicles in the dermal papillae of hair follicles

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