Anatomia Histologia Embryologia最新文献

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Linear measurements and shape analysis in the calcaneus of selected dog breeds 选定犬种小腿骨的线性测量和形状分析。
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-18 DOI: 10.1111/ahe.13078
Esra Toryan, Tomasz Szara, Ozan Gündemir
{"title":"Linear measurements and shape analysis in the calcaneus of selected dog breeds","authors":"Esra Toryan, Tomasz Szara, Ozan Gündemir","doi":"10.1111/ahe.13078","DOIUrl":"10.1111/ahe.13078","url":null,"abstract":"<p>The vast array of dog breeds showcases a remarkable diversity that extends to osteological differences. Exploring these morphological distinctions and establishing reference data for various dog breeds are essential steps in comprehending the evolutionary changes that dogs have undergone. In this study, we conducted linear measurements of the calcaneus and performed shape analyses on selected dog breeds to elucidate distinctive characteristics among them. X-ray images of the calcaneus from six different dog breeds—Maltese Terrier, Toy Poodle, Pomeranian, Cavalier King Charles Spaniel, French Bulldog and Golden Retriever—were utilized for this investigation. Radiological images were obtained from a medio-lateral exposure, positioned 30 cm away from the x-ray device. From these images, four linear length measurements and two angle values were extracted. Additionally, a 2D geometric morphometric analysis was conducted using 32 semi landmarks placed on the radiological images. Linear measurements were assessed using ANOVA, while principal component analysis was employed to examine shape variations across all individuals. Shape differences between species were further elucidated through canonical variates analysis. The results revealed that the Golden Retriever exhibited the highest values for linear measurements, while the Pomeranian showed the lowest. Maltese Terriers displayed the highest dorsal calcaneal angle value. Notably, there were significant differences in calcaneal body length among all breeds, except for the Toy Poodle and Cavalier King Charles Spaniel. Moreover, Maltese Terriers exhibited statistically distinct angular measurements compared to other breeds. Principal component analysis unveiled that the first principal component explained 32.69% of the total variation, with the cranial edge of the calcaneal body being closer to the body in individuals with higher values. Shape variations also indicated that Golden Retrievers displayed a broader range of shapes compared to French Bulldogs, which exhibited a more conservative distribution. While there was no clear breed-specific distinction according to the first principal component, Cavalier King Charles Spaniels generally showed lower values. In canonical variates analysis, distinctions in calcaneal shape between species were apparent, with Golden Retrievers, Cavalier King Charles Spaniels and French Bulldogs displaying positive values for the first canonical variates. The highest Procrustes distance was observed between Maltese Terriers and Cavalier King Charles Spaniels. Notably, allometry was found to be statistically insignificant. This comprehensive study utilized both linear and geometric morphometric analyses based on x-ray images, yielding promising results. The integration of imaging systems in veterinary anatomy research presents numerous opportunities for studying animal welfare and health, utilizing various materials such as bones and cadavers. These advancements hold the ","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141421798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gross morphology and morphometry of native and decellularized heart valves of caprine: A comparative study 毛细形态学和形态计量学:原生和脱细胞毛细动物心脏瓣膜的比较研究:比较研究
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-16 DOI: 10.1111/ahe.13075
S. A. V. Manikanta Sarma, Devendra Pathak, Opinder Singh, Varinder Uppal, Jitender Mohindroo, Ratan Kumar Choudhary
{"title":"Gross morphology and morphometry of native and decellularized heart valves of caprine: A comparative study","authors":"S. A. V. Manikanta Sarma,&nbsp;Devendra Pathak,&nbsp;Opinder Singh,&nbsp;Varinder Uppal,&nbsp;Jitender Mohindroo,&nbsp;Ratan Kumar Choudhary","doi":"10.1111/ahe.13075","DOIUrl":"10.1111/ahe.13075","url":null,"abstract":"<p>The gross morphological examination of native caprine heart valves revealed distinctive structural characteristics of the caprine's cardiac anatomy. Four primary orifices were identified, each protected by thin, valve-like structures. Atrioventricular orifices featured tricuspid and bicuspid valves, while the aorta and pulmonary arteries were guarded by semilunar valves. Within the atrioventricular apparatus, distinct features were observed including the tricuspid valve's three leaflets and the bicuspid valve's anterior and posterior leaflets. Ultrasonography provided insights into valve thickness and chordae tendineae lengths. Morphometric studies compared leaflets/cusps within individual native valves, showcasing significant variations in dimensions. Comparative analysis between native and decellularized valves highlighted the effects of decellularization on leaflet thickness and chordae tendineae lengths. Decellularized valves exhibited reduced dimensions compared to native valves, indicating successful removal of cellular components. While some dimensions remained unchanged post-decellularization, significant reductions were observed in leaflet thicknesses and chordae tendineae lengths. Notably, semilunar valve cusps displayed varying responses to decellularization, with significant reductions in cusp lengths observed in the aortic valve, while the pulmonary valve exhibited more subtle changes. These findings underscore the importance of understanding structural alterations in heart valves post-decellularization, providing valuable insights for tissue engineering applications and regenerative medicine.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141332404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characteristics of pectens in diurnal and nocturnal birds and a new functional proposal relating to non-visual opsins 昼行性鸟类和夜行性鸟类栉膜的特征以及与非视觉蛋白有关的新功能建议。
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-13 DOI: 10.1111/ahe.13071
Ken Takeshi Kusakabe, Miho Seto, Yumiko Harada, Asako Kusakabe, Lita Rakhma Yustinasari, Muneyoshi Hyoto, Chihiro Nakahara, Ai Gondo, Tomohiro Kondo, Kiyoshi Kano, Yasuo Kiso, Hiroyuki Imai
{"title":"Characteristics of pectens in diurnal and nocturnal birds and a new functional proposal relating to non-visual opsins","authors":"Ken Takeshi Kusakabe,&nbsp;Miho Seto,&nbsp;Yumiko Harada,&nbsp;Asako Kusakabe,&nbsp;Lita Rakhma Yustinasari,&nbsp;Muneyoshi Hyoto,&nbsp;Chihiro Nakahara,&nbsp;Ai Gondo,&nbsp;Tomohiro Kondo,&nbsp;Kiyoshi Kano,&nbsp;Yasuo Kiso,&nbsp;Hiroyuki Imai","doi":"10.1111/ahe.13071","DOIUrl":"10.1111/ahe.13071","url":null,"abstract":"<p>The pecten is a fold-structured projection at the ocular fundus in bird eyes, showing morphological diversity between the diurnal and nocturnal species. However, its biological functions remain unclear. This study investigated the morphological and histological characteristics of pectens in wild birds. Additionally, the expression of non-visual opsin genes was studied in chicken pectens. These genes, identified in the chicken retina and brain, perceive light periodicity regardless of visual communication. Similar pleat numbers have been detected among bird taxa; however, pecten size ratios in the ocular fundus showed noticeable differences between diurnal and nocturnal birds. The pectens in nocturnal brown hawk owl show extremely poor vessel distribution and diameters compared with that of diurnal species. RT-PCR analysis confirmed the expression of <i>Opn5L3</i>, <i>Opn4x</i>, <i>Rrh</i> and <i>Rgr</i> genes. In situ hybridization analysis revealed the distribution of <i>Rgr</i>-positive reactions in non-melanotic cells around the pecten vessels. This study suggests a novel hypothesis that pectens develop dominantly in diurnal birds as light acceptors and contribute to continuous visual function or the onset of periodic behaviour.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Histological tissue classification with a novel statistical filter-based convolutional neural network 利用基于统计滤波器的新型卷积神经网络进行组织分类
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-13 DOI: 10.1111/ahe.13073
Nejat Ünlükal, Erkan Ülker, Merve Solmaz, Kübra Uyar, Şakir Taşdemir
{"title":"Histological tissue classification with a novel statistical filter-based convolutional neural network","authors":"Nejat Ünlükal,&nbsp;Erkan Ülker,&nbsp;Merve Solmaz,&nbsp;Kübra Uyar,&nbsp;Şakir Taşdemir","doi":"10.1111/ahe.13073","DOIUrl":"10.1111/ahe.13073","url":null,"abstract":"<p>Deep networks have been of considerable interest in literature and have enabled the solution of recent real-world applications. Due to filters that offer feature extraction, Convolutional Neural Network (CNN) is recognized as an accurate, efficient and trustworthy deep learning technique for the solution of image-based challenges. The high-performing CNNs are computationally demanding even if they produce good results in a variety of applications. This is because a large number of parameters limit their ability to be reused on central processing units with low performance. To address these limitations, we suggest a novel statistical filter-based CNN (HistStatCNN) for image classification. The convolution kernels of the designed CNN model were initialized by continuous statistical methods. The performance of the proposed filter initialization approach was evaluated on a novel histological dataset and various histopathological benchmark datasets. To prove the efficiency of statistical filters, three unique parameter sets and a mixed parameter set of statistical filters were applied to the designed CNN model for the classification task. According to the results, the accuracy of GoogleNet, ResNet18, ResNet50 and ResNet101 models were 85.56%, 85.24%, 83.59% and 83.79%, respectively. The accuracy was improved by 87.13% by HistStatCNN for the histological data classification task. Moreover, the performance of the proposed filter generation approach was proved by testing on various histopathological benchmark datasets, increasing average accuracy rates. Experimental results validate that the proposed statistical filters enhance the performance of the network with more simple CNN models.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141312166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Amylin-like immunoreactivity in the extra-islet peptide YY-producing and glucagon-immunoreactive cells in Japanese quail pancreas 日本鹌鹑胰腺胰外肽 YY 生成细胞和胰高血糖素免疫反应细胞中的淀粉样免疫反应。
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-12 DOI: 10.1111/ahe.13074
Bonten Yanagida, Toshiharu Yamamoto, Hirohumi Suzuki
{"title":"Amylin-like immunoreactivity in the extra-islet peptide YY-producing and glucagon-immunoreactive cells in Japanese quail pancreas","authors":"Bonten Yanagida,&nbsp;Toshiharu Yamamoto,&nbsp;Hirohumi Suzuki","doi":"10.1111/ahe.13074","DOIUrl":"10.1111/ahe.13074","url":null,"abstract":"<p>In this study, we investigated amylin-like substance distribution in the pancreas of Japanese quail (<i>Coturnix japonica</i>) using a specific anti-rat amylin serum. We detected amylin-immunoreactive cells dispersed in the pancreatic extra-islet region but not in the islet region. The synthetic rat amylin-containing serum pre-absorption abolished the staining profile. Almost all amylin-immunoreactive cells were immuno-positive for peptide YY (PYY). In addition, certain amylin-immunoreactive cells stained immuno-positive for glucagon. Amylin and PYY co-secreted from the extra-islet cells might participate in the insulin and glucagon release regulation in the pancreas and food intake modulation through the central nervous system.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141307324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Volumetric study on sheep brain using stereology technique 利用立体学技术对绵羊大脑进行容积研究。
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-10 DOI: 10.1111/ahe.13072
Javad Sadeghinezhad, Mohamad Ebrahimi, Mehdi Heydari Lehi
{"title":"Volumetric study on sheep brain using stereology technique","authors":"Javad Sadeghinezhad,&nbsp;Mohamad Ebrahimi,&nbsp;Mehdi Heydari Lehi","doi":"10.1111/ahe.13072","DOIUrl":"10.1111/ahe.13072","url":null,"abstract":"<p>Three-dimensional morphometric data better show the structural and functional characteristics of the brain. The objective of this study was to estimate the volume of the cerebral structures of the sheep using design-based stereology. The brains of five sheep were used, fixed in formalin 10% and embedded in agar 6%. An average of 10–12 slab was obtained from each brain. All slabs were stained using Mulligan's method and photographs were recorded. The volume of the brain and its structures were estimated using the Cavalieri's estimator and the point counting system. The total volume was 70604.8 ± 132.45 mm<sup>3</sup>. The volume fractions of the grey and white matters were calculated as 42.55 ± 0.21% and 24.23 ± 0.51% of the whole brain, respectively. The fractional volume of the caudate nucleus and claustrum were estimated at 2.39 ± 0.08% and at 1.008 ± 0.057% of total brain volume. The volumes of corpus callosum, internal capsule and external capsule were 1.24 ± 0.053%, 3.63 ± 0.22% and 0.698 ± 0.049% of total cerebral volume, respectively. These data could help improve the veterinary comparative neuroanatomy knowledge and development of experimental studies in the field.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141301990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Shape variation in cranium, mandible and teeth in selected mouse strains 某些小鼠品系的头盖骨、下颌骨和牙齿的形状变异。
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-06 DOI: 10.1111/ahe.13064
Duygu Küçük Ağaç, Ece Oktay, Burcu Onuk, Murat Kabak, Ozan Gündemir
{"title":"Shape variation in cranium, mandible and teeth in selected mouse strains","authors":"Duygu Küçük Ağaç,&nbsp;Ece Oktay,&nbsp;Burcu Onuk,&nbsp;Murat Kabak,&nbsp;Ozan Gündemir","doi":"10.1111/ahe.13064","DOIUrl":"10.1111/ahe.13064","url":null,"abstract":"<p>There are different strains of laboratory mouse used in many different fields. These strains differ anatomically. In order to determine these anatomical differences, shape analysis was conducted according to species. CD-1, C57bl/6 and Balb-c strains were preferred to study these differences. Forty-eight adult mouse strains belonging to these strains were utilized. The bones were photographed and geometric morphometry was applied to these photographs. Principal Component Analysis was applied to determine shape variations. In Principal component 1 for <i>cranium</i>, CD-1 and C57bl/6 strain groups showed different shape variations, while Balb-c strain group showed similar shape variations to the other strain groups. Principal Component 1 for the <i>mandible</i> separated the CD-1 and C57bl/6 strain groups in terms of shape variation. Principal Component 2 explained most of the variation between the C57bl/6 and CD-1 lineage groups. In PC1 for <i>molars</i>, the CD-1 group showed a different shape variation from the other groups. Mahalanobis distances and Procrustes distances were measured using Canonical variance analysis to explain the differences between the lineage groups. These measurements were statistically significant. For <i>cranium</i>, in canonical variate 1, CD-1 group of mouse and Balb-c group of mouse were separated from each other. In canonical variate 2, C57bl/6 group of mouse were separated from the other groups. For <i>mandible</i>, Balb-c group of mouse in canonical variate 1 and CD-1 group of mouse in canonical variate 2 were separated from the other groups. For <i>molars</i>, CD-1 group of mouse in canonical variate 1 and Balb-c group of mouse in canonical variate 2 were separated from the other groups. It was thought that these anatomical differences could be caused by genotypic factors as well as dietary differences and many different habits that would affect the way their muscles work.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141262178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Histochemical and immunohistochemical investigation of the number and localization of mast cells in the feline tongue 猫舌头肥大细胞数量和定位的组织化学和免疫组织化学研究。
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-04 DOI: 10.1111/ahe.13069
Tuğrul Ertuğrul, Şerife Tütüncü, Nurcan Delice, Bengül Özdemir
{"title":"Histochemical and immunohistochemical investigation of the number and localization of mast cells in the feline tongue","authors":"Tuğrul Ertuğrul,&nbsp;Şerife Tütüncü,&nbsp;Nurcan Delice,&nbsp;Bengül Özdemir","doi":"10.1111/ahe.13069","DOIUrl":"10.1111/ahe.13069","url":null,"abstract":"<p>This is the first study to describe the subtypes, number and distribution of mast cells (MC) in cat tongue by histochemical and immunohistochemical methods. Six male adult felines' tongue tissue samples consist of the study's material. Samples were fixed in 10% formaldehyde. MC number and distribution in the feline tongue were assessed using toluidine blue. Also, sections taken from blocks were stained in alcian blue/safranin O (AB/SO) combined dyes to determine the MC subtypes. The Streptavidin biotin complex method using anti-chymase and anti-tryptase primary antibodies was used for immunohistochemistry. Metachromatic MCs were mainly observed in the lamina propria close to the multilayered keratinized stratified squamous epithelium. The high number of MCs in this region may be because the dorsal surface of the tongue plays an essential role in the defence system of tongue tissue and, thus, of the body as a whole. Additionally, the number of MCs stained with AB (+) (1.7 ± 0.08) in the feline tongue was statistically higher than those with SO (+) (0.18 ± 0.02). This might be interpreted as an indication that MC heterogeneity may be due not only to their staining properties but also to their localization. It is also conceivable that the high histamine content may be a factor in this. Tryptase-positive MCs were found in the loose connective tissue around blood vessels, between the glands, as solitary cells, or in groups of several cells. Chymase-positive MCs were observed more individually rather than in groups. Moreover, chymase-positive MCs were detected to be located in the filiform papillae subepithelial and in the blood vessels' immediate vicinity. Animals often lick themselves to clean themselves and promote healing. For this reason, it is very important to protect the tongue, which is in direct contact with the external environment, against foreign agents. Considering both the functional and protective properties of the tongue, we concluded that MCs may play a role in oral cavity immunity and protective effect.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ahe.13069","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141238804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Testicular histomorphometric patterns and spermatogenesis dynamics of Oecomys bicolor tomes, 1860 (Rodentia: Cricetidae) Oecomys bicolor tomes, 1860 (Rodentia: Cricetidae) 的睾丸组织形态计量模式和精子发生动力学
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-04 DOI: 10.1111/ahe.13062
Ana Luiza Pereira Martins, Fernanda Carolina Ribeiro Dias, Elizabeth Lopes Oliveira, Grasielle Avelar Vieira Rodrigues, Gleide Fernandes de Avelar, Fabiana Cristina Silveira Alves de Melo, Kyvia Lugate Cardoso Costa, Sérgio Luis Pinto da Matta
{"title":"Testicular histomorphometric patterns and spermatogenesis dynamics of Oecomys bicolor tomes, 1860 (Rodentia: Cricetidae)","authors":"Ana Luiza Pereira Martins,&nbsp;Fernanda Carolina Ribeiro Dias,&nbsp;Elizabeth Lopes Oliveira,&nbsp;Grasielle Avelar Vieira Rodrigues,&nbsp;Gleide Fernandes de Avelar,&nbsp;Fabiana Cristina Silveira Alves de Melo,&nbsp;Kyvia Lugate Cardoso Costa,&nbsp;Sérgio Luis Pinto da Matta","doi":"10.1111/ahe.13062","DOIUrl":"https://doi.org/10.1111/ahe.13062","url":null,"abstract":"<p>Although the order Rodentia does not present a high risk of extinction compared to mammals as a whole, several families demonstrate high levels of threat and/or data deficiency, therefore highlighting the need for targeted research and the application of ecological and reproductive data to the development of conservation actions. The order Rodentia, the largest among mammals, includes 9 families, and the family Cricetidae is the most diverse of the Brazilian rodents. In Brazil, 12 of the 16 genera of <i>Oecomys</i> are found. <i>Oecomys bicolor</i> is known in Brazil as the ‘arboreal rat’ and is, found in dry, deciduous and tropical forests. The mean body weight of <i>Oecomys bicolor</i> was 35.8 g and the gonadal, tubular and epithelial somatic indexes were, 0.53%, 0.47% and 0.37%, respectively. Seminiferous tubules volume density was 89.72% and the mitotic and meiotic indexes corresponded to 8.59 and 2.45 cells, respectively, and the yield of spermatogenesis was 23.83 cells. The intertubular compartment represented 10.28% of the testis parenchyma and around 5% of the interstitial space was occupied by Leydig cells, whose number per gram of testis was 11.10 × 10<sup>7</sup> cells. By evaluating the biometric and histomorphometric characteristics of the testis, there is evidence that this species has a high investment in reproduction. Due to the high contribution of the seminiferous epithelium and the intertubular compartment in this species, compared to the others of the same family, it is possible to infer that the species <i>Oecomys bicolor</i> has a promiscuous reproductive behaviour.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141251296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Histology, histochemistry and ultrastructure of cornea of domestic pigs (Sus scrofa domesticus) 家猪角膜的组织学、组织化学和超微结构
IF 0.9 4区 农林科学
Anatomia Histologia Embryologia Pub Date : 2024-06-04 DOI: 10.1111/ahe.13068
Rakesh Kumar Barhaiya, Pawan Kumar
{"title":"Histology, histochemistry and ultrastructure of cornea of domestic pigs (Sus scrofa domesticus)","authors":"Rakesh Kumar Barhaiya,&nbsp;Pawan Kumar","doi":"10.1111/ahe.13068","DOIUrl":"https://doi.org/10.1111/ahe.13068","url":null,"abstract":"<p>A comprehensive light and ultrastructural examination of the cornea in Domestic Pigs (<i>Sus scrofa domesticus</i>) revealed four distinct layers: the anterior epithelium, corneal stroma, Descemet's membrane and endothelium. Although Bowman's layer was not distinctly identified through histology, histochemical analysis indicated the presence of a rudimentary Bowman's layer, possibly vestigial from evolution. Scanning electron microscopy of the outer corneal surface unveiled two cell types, characterized by micro-projections, with light cells exhibiting shorter, thicker projections compared to dark cells. Examination of the inner surface via scanning electron microscopy demonstrated an endothelial layer devoid of cilia and microvilli, yet faint round to oval elevations were observed, potentially representing cell nuclei. Transmission electron microscopy unveiled that basal cells of the anterior epithelium closely adhered to the basement membrane, featuring half desmosomes along the basal surface. These basal cells extensively interconnected through interdigitations and a few desmosomes. The superficial cell layer consisted of a few rows of closely attached flat cells, forming a leak-proof layer with zona occludens. The outermost cells of this layer displayed fine projections to enhance the surface area, facilitating tear film distribution. At lower magnification, Transmission electron microscopy of the corneal stroma revealed alternating light and dark bands, with light bands representing transverse sections of collagen fibril lamellae and dark bands corresponding to longitudinal or oblique sections. Spindle-shaped keratocytes (fibroblasts) were identified as the primary stromal cells, intermingled between the lamellae, and featured long processes in close contact with neighbouring keratocytes. Overall, the histomorphology of the pig cornea resembles that of the human cornea except indistinct Bowman's membrane. This detailed understanding of the normal corneal structure in pigs hold great significance for biomedical research, providing a valuable reference for studies involving this animal model.</p>","PeriodicalId":49290,"journal":{"name":"Anatomia Histologia Embryologia","volume":"53 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141251254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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