Dog kidney: Anatomical relationships between intrarenal arteries and kidney collecting system

Marques-Sampaio, Beatriz P.S.; Pereira‐Sampaio, Marco A.; Henry, Robert W.; Favorito, Luciano A.; Sampaio, Francisco J.B.

doi:10.1002/ar.20567

Cited by 31 publications

(57 citation statements)

References 18 publications

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“…Each of the arcuate arteries gave rise to many interlobular arteries, as reported for rabbits (Sindel et al 1990;Ertas 2006), rats (Fuller and Huelke 1973), canines (Aksoy and Ozudogru 2003;Aslan 1995;Khamanarong et al 2004;Marques-Sampaio et al 2007), and sheep (Aslan and Nazli 2001). Aslan and Nazli (2001) and Nur and Yoldas (2011) reported an anastomosis between the dorsal and ventral branches in one kidney.…”

Section: Discussionmentioning

confidence: 54%

Macroscopic distribution of the renal artery and intrarenal arteries in mole rats (Spalax leucodon)

Yoldaş¹,

Aydın²,

Ilgün³

2014

Vet. Med. - Czech

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ABSTRACT:A study was conducted of the kidneys of adult mole rats (Spalax leucodon) to describe the macro-and mesoscopic morphology of the renal arterial distribution and some additional anatomical features. The kidneys of the mole rat lay alongside the vertebral column in the abdominal region, the right kidney situated more cranial than the left. Covered by a thin connective tissue capsule, the kidney was bean-shaped, smooth, and reddish-brown. The mean live weight of the studied mole rats was 203.6 ± 15.05 g. The mean kidney weight was 0.636 ± 0.048 g. The mean weight of the right kidney (0.641± 0.039 g) was significantly (P < 0.01) heavier than that of the left one (0.630 ± 0.057g). Sixteen three-dimensional endocasts of the renal artery and intrarenal arteries were prepared using standard injection-corrosion techniques and examined. A single renal artery was observed in 100% of the specimens. The renal arteries divided, forming a dorsal and a ventral branch; these bifurcated forming cranial and caudal segmental branches. No anastomoses were observed between any of these branches.

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Section: Discussionmentioning

confidence: 54%

Macroscopic distribution of the renal artery and intrarenal arteries in mole rats (Spalax leucodon)

Yoldaş¹,

Aydın²,

Ilgün³

2014

Vet. Med. - Czech

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“…On the other hand, the renal arteries of human [1, 24], monkey [25], and dog [11] were also classified by taking account of their renal arteries branching, and the renal arteries of the SD and W were not classified.…”

Section: Introductionmentioning

confidence: 99%

Morphological Characteristics of Renal Artery and Kidney in Rats

Yoldaş¹,

Dayan

2014

The Scientific World Journal

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The gross anatomy and morphometry of the kidney and renal arteries were studied in the strains of laboratory rat: Sprague-Dawley (Sp) and Wistar (W) rats. Total of 106 three-dimensional endocasts of the intrarenal arteries of kidney that were prepared using standard injection-corrosion techniques were examined. A single renal artery was observed in 100% of the cases. The renal arteries were divided into a dorsal and a ventral branch. The dorsal and ventral branches were divided into two branches, the cranial and caudal branch. Renal arteries were classified into types I and II, depending on the cranial and caudal branches and their made of branching. The present study also showed that the right kidney was slightly heavier than the left one and that the kidney of the male was generally larger than that of the female. The mean live weights of the Sprague-Dawley and Wistar rats were found to be 258.26 ± 5.9 and 182.4 ± 19.05 g, respectively. The kidney weights were significantly correlated (P < 0.01) with body weights. The kidney weights were not found significantly correlated (P > 0.01) with the length of renal arteries.

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“…The vasa recta arise from postglomerular efferent arterioles and then branch out into a complex capillary surrounding the renal tubules and interstitium [19,20]. Interstitial cells of the renal papilla are associated with this capillary system and the loops of Henle, but not with the collecting ducts, Figs.…”

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confidence: 99%

Vascular theory of the formation of Randall plaques

Taylor

Stoller

2014

Urolithiasis

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formation remain a mystery as well. Urinary stone formation is likely a multifactorial process dependent upon environmental and genetic factors. Furthering the complexity of stone formation, several types of calculi exist, each possibly with a disparate process of formation. Certainly, the formation of cystine stones is genetically based and is dependent upon urinary nucleation and supersaturation. A similar process of increasing supersaturation leading to nucleation also likely explains uric acid stone formation. Urinary mineral supersaturation and nucleation do not appear to adequately explain the entire process of calciumbased nephrolithiasis formation, which remains the most common type of urinary calculi and is often represented by idiopathic calcium stone formation [3]. The relationship between these calcium-based calculi, particularly calcium oxalate, and Randall plaques has been well documented.Randall's work decades ago supports alternate theories of calcium stone formation independent of urinary supersaturation. After performing more than a 1,000 cadaveric renal dissections, Randall implicated the renal papilla tip as the initiating site of calcium-based urolithiasis. He observed calcium salt deposits in nearly 20 % of non-selected cadaveric units [4]. The presence of Randall plaques may be associated with urinary stones in some, but this does not necessarily implicate subsequent stone formation in all. Work by others suggests that these calcium salt deposits are present in nearly all calcium oxalate stone formers. Furthermore, calcium oxalate calculi are adherent to Randall plaques in up to 50 % stone formers [5].The calcium deposits identified by Randall, termed plaques, were located within the renal interstitium of papillae. He postulated that the basement membrane of the collecting ducts calcified and, overtime, eroded into the papillary luminal surface [4]. Randall plaques remain implicated with the process of urolithiasis formation, but how this Abstract The relationship between calcium-based calculi and Randall plaques is well documented, but the role these plaques play in the early process of urinary stone formation remains unknown. The vascular hypothesis of Randall plaque formation has been proposed, and recent works support this concept. The renal papilla's vascular environment is subject to relative hypoxia, hyperosmolar surroundings, and turbulent blood flow. These factors together create an environment prone to vascular injury and may potentiate Randall plaque precipitation. Recent data support the similarity between the vascular calcification process itself and urinary stone formation. Furthermore, epidemiological studies have suggested an association between urinary stones, adverse cardiovascular events, and vascular calcification risk factors. The concept that an initial vascular insult precipitates a Randall plaque and subsequent urolithiasis is compelling and represents an area in need of continued research. This may lead to future novel treatment approaches to urolithiasis. Keywords...

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Dog kidney: Anatomical relationships between intrarenal arteries and kidney collecting system

Cited by 31 publications

References 18 publications

Macroscopic distribution of the renal artery and intrarenal arteries in mole rats (Spalax leucodon)

Macroscopic distribution of the renal artery and intrarenal arteries in mole rats (Spalax leucodon)

Morphological Characteristics of Renal Artery and Kidney in Rats

Vascular theory of the formation of Randall plaques

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