Comparative anatomy of the hepatobiliary systems in quail and pigeon, with a perspective for the gallbladder-loss

Higashiyama, Hiroki; Kanai‐Azuma, Masami

doi:10.1292/jvms.20-0669

Cited by 5 publications

(4 citation statements)

References 29 publications

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“…The present study was designed to demonstrate the anatomical and histological differences between two types of animal species , the male rat and pigeon , so many variations were found in the present study , for example the liver of pigeon have no gall bladder in both lobes and this fact was mentioned by (16) ,and (17), this note was in agreement of our study , in the rat was recorded the presence of gall bladder Abd draining bile in the second part of duodenum m this result is resemble to that mentioned by (18). The histological architecture of the liver was building by group of cells in pigeon surrounded by blood sinusoids, in the liver of rat m mostly arranged in columns with oligonol cells surrounded by the blood sinusoids draining in the central vein, so this pattern is similar for each other (19).…”

Section: Discussionsupporting

confidence: 92%

Macro and Micro Anatomical Comparative Study for Liver, Kidney and Testis Between the Albino Rat and Pigeon

Alnassiri

2024

Stallion J. Multidiscip. Assoc. Res. Stud.

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The present study was designed to demonstrate the anatomical and histological variations between the certain organs in both the rat as a model of experimental mammals and pigeon as an avian model. Five albino rats and five pigeons were utilized, the liver, kidney and the testicles were taken from those animals after scarifying and specimens were taken from those organs, fixed in 10 % formalin for 24 hours before transferred for histological technique, the slices were stained with hematoxylin and eosin. The anatomical observation indicated that the liver of rat was formed by right, left lobes and intermediate, located in the anterior part of abdomen, in the pigeon, had two lobes without gall bladder. The kidney of the rat was bean shaped, brown reddish color with idented medial border present in the abdominal cavity near and around the lumbar vertebrae, the kidney of pigeon was lobulated into three and the kidney was lodged on the ventral aspect of the synsacrum. The testis of rat was oval in shape present in the scrotum, and in the pigeon located in the abdominal and pelvic cavity. The histological result indicated the liver of rat was with columns of polygonal liver cells surrounded by blood sinusoids draining in the central vein, while in the pigeon, the cells were present in groups also had blood sinusoids with Kupffer cells and central vein for draining the blood outside the liver, the kidney of both types had an cortex and medulla with presence of glomeruli in the cortex, both had proximal and distal convoluted tubules , in the pigeon there is no thin segment of Henle loops . The testis was occupied by seminiferous tubules in both types and each tubule was containing the different types of spermatic cells and spermatozoa, also Leydig cells were present in groups, spermatogenesis was intensive in pigeon in cases of seasonal phase in conclusion, variation for the visceral organs in both rats and pigeon were determined also histological differences were present, otherwise similarities were also observed.

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Section: Discussionsupporting

confidence: 92%

Macro and Micro Anatomical Comparative Study for Liver, Kidney and Testis Between the Albino Rat and Pigeon

Alnassiri

2024

Stallion J. Multidiscip. Assoc. Res. Stud.

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“…The major veins of the liver gather in the vena portaea and enter the heart through a short route through the sinus venosus. The topographical relationships among the major veins are identical to those of mammals (Higashiyama et al, 2016) and birds (Higashiyama & Kanai, 2021), but distinct from those of lampreys. Thus, the hepatobiliary morphology is highly conserved among the vertebrates, and the lamprey case is likely to be a derived form.…”

Section: Discussionmentioning

confidence: 77%

Gross anatomy of the Pacific hagfish,Eptatretus burgeri, with special reference to the coelomic viscera

Muramatsu

Suzuki

et al. 2022

Preprint

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Hagfish (Myxinoidea) are a deep-sea taxon of cyclostomes, the extant jawless vertebrates. Many researchers have examined the anatomy and embryology of hagfish to shed light on the early evolution of vertebrates; however, the diversity within hagfish is often overlooked. Hagfish have two lineages, Myxininae and Eptatretinae. Usually, textbook illustrations of hagfish anatomy reflect the morphology of the former lineage, especially Myxine glutinosa, with its single pair of external branchial pores. Here, we instead report the gross anatomy of an Eptatretinae, Eptatretus burgeri, which has six pairs of branchial pores, especially focusing on the coelomic organs. Dissections were performed on fixed and unfixed specimens to provide a guide for those doing organ- or tissue-specific molecular experiments. Our dissections revealed that the ventral aorta is Y-branched in E. burgeri, which differs from the unbranched morphology of Myxine. Otherwise, there were no differences in the morphology of the lingual apparatus or heart in the pharyngeal domain. The thyroid follicles were scattered around the ventral aorta, as has been reported for adult lampreys. The hepatobiliary system more closely resembled those of jawed vertebrates than those of adult lampreys, with the liver having two lobes and a bile duct connecting the gallbladder to each lobe. Overall, the visceral morphology of E. burgeri does not differ significantly from that of the known Myxine at the level of gross anatomy, except for the number of branchial pores.

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“…Some animals, like the rats, deer, horses, and the pigeons, lack a sac-like gallbladder-cystic duct system 5 , 58 , 59 , while it is a major component of the extrahepatic biliary system in the mouse and human fetus. BA is rarely found in animals without a gallbladder, such as pregnant mares and foals, which usually receive good veterinary care 60 , 61 .…”

Section: Discussionmentioning

confidence: 99%

Impact of gallbladder hypoplasia on hilar hepatic ducts in biliary atresia

Miyazaki,

Takami,

Uemura

et al. 2024

Commun Med

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Background Biliary atresia (BA) is an intractable disease of unknown cause that develops in the neonatal period. It causes jaundice and liver damage due to the destruction of extrahepatic biliary tracts,. We have found that heterozygous knockout mice of the SRY related HMG-box 17 (Sox17) gene, a master regulator of stem/progenitor cells in the gallbladder wall, exhibit a condition like BA. However, the precise contribution of hypoplastic gallbladder wall to the pathogenesis of hepatobiliary disease in Sox17 heterozygous embryos and human BA remains unclear. Methods We employed cholangiography and histological analyses in the mouse BA model. Furthermore, we conducted a retrospective analysis of human BA. Results We show that gallbladder wall hypoplasia causes abnormal multiple connections between the hilar hepatic bile ducts and the gallbladder-cystic duct in Sox17 heterozygous embryos. These multiple hilar extrahepatic ducts fuse with the developing intrahepatic duct walls and pull them out of the liver parenchyma, resulting in abnormal intrahepatic duct network and severe cholestasis. In human BA with gallbladder wall hypoplasia (i.e., abnormally reduced expression of SOX17), we also identify a strong association between reduced gallbladder width (a morphometric parameter indicating gallbladder wall hypoplasia) and severe liver injury at the time of the Kasai surgery, like the Sox17-mutant mouse model. Conclusions Together with the close correlation between gallbladder wall hypoplasia and liver damage in both mouse and human cases, these findings provide an insight into the critical role of SOX17-positive gallbladder walls in establishing functional bile duct networks in the hepatic hilus of neonates.

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Comparative anatomy of the hepatobiliary systems in quail and pigeon, with a perspective for the gallbladder-loss

Cited by 5 publications

References 29 publications

Macro and Micro Anatomical Comparative Study for Liver, Kidney and Testis Between the Albino Rat and Pigeon

Macro and Micro Anatomical Comparative Study for Liver, Kidney and Testis Between the Albino Rat and Pigeon

Gross anatomy of the Pacific hagfish,Eptatretus burgeri, with special reference to the coelomic viscera

Impact of gallbladder hypoplasia on hilar hepatic ducts in biliary atresia

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