Presence and structure of anal and vaginal tonsils in the laboratory shrew (Suncus murinus)

Kubo, Kazuko; Isomura, Genzoh

doi:10.1016/s0940-9602(96)80058-6

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…However, not all shrew species have this tissue (Ortmann 1960). For a detailed description of the glands present in the ano-genital region, refer to Ortmann (1960), Bee et al (1980) and Kubo and Isomura (1996).…”

Section: The Licked Substancementioning

confidence: 99%

The behaviour of licking the everted rectum in shrews (Soricidae, Insectivora)

Hirakawa

Haberl²

1998

Acta Theriol.

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Haberl W. 1998. The behaviour of licking the everted rectum in shrews (Soricidae, Insectivora). Acta Theriologica: 43: 113-120.The behaviour of licking the everted rectum in shrews, hitherto referred to as "coprophagy" or "refection" is reviewed. To avoid confusion with "true" faeces-eating, it is proposed to persistently use the descriptive term "rectum-licking" when referring to this phenomenon. The behaviour is characterized by the animal everting the rectum by a series of abdominal contractions and licking it in a curled-up posture, apparently ingesting a yet undetermined substance often described as a "milky white fluid". This behaviour has been reported repeatedly, but most previous observations are only fragmentary and the accounts on the generality, frequency, rhythm, timing, mechanism, and functions of the behaviour are not all consistent. Rectum-licking is certainly an infrequent and elusive behaviour, which can be mistaken for other behaviours that share the same curled-up posture. Further studies are required to elucidate this behaviour. Forestry and Forest Products Research Institute,

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Section: The Licked Substancementioning

confidence: 99%

The behaviour of licking the everted rectum in shrews (Soricidae, Insectivora)

Hirakawa

Haberl²

1998

Acta Theriol.

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“…The laboratory shrew (Suncus murinus) is of special interest in understanding tonsillar evolution, as this species has a pair of anal tonsils in the ostium urogenitoanale around the anus in addition to a palatine tonsil (Kubo and Isomura, 1996). The postnatal development and special features of the epithelium of the anal tonsil have been described and we have suggested an important role for the anal tonsil in immunological surveillance of the ostium urogenitoanale, the common cavity on the border of the anus (Sakai and Isomura, 2004;Sakai et al, 2002).…”

Section: Introductionmentioning

confidence: 96%

The distribution of T lymphocytes, B lymphocytes, and dendritic‐like cells of the anal tonsil in the laboratory shrew, Suncus murinus

Sakai

Isomura

Shinzato

et al. 2010

Microscopy Res & Technique

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We investigated the distribution of T lymphocytes, B lymphocytes, and S-100 protein-immunoreactive dendritic-like in the anal tonsil of the laboratory shrew, Suncus murinus. In adult animals, T lymphocytes were located mainly at the periphery of the anal tonsil, especially around small blood vessels. B lymphocytes were located in the central and subepithelial region of the anal tonsil, which includes primary lymphoid follicles, and in which there are small numbers of scattered T lymphocytes. B and T lymphocytes were distributed over 72.7 and 27.3% of the tonsillar area, respectively. However, their areas of distribution were not clearly distinguished. The areas containing B lymphocytes were enriched in S-100 protein antibody-immunoreactive cells, which exhibited a dendritic shape. These S-100-positive cells appeared to be identical to the follicular dendritic cells (FDC) seen in the follicles of lymphoid organs. These results suggest that the anal tonsils constitute one of the gut-associated lymphoid tissues (GALT), and that a function of the anal tonsil includes the capture of intruding antigens that would generate protective antibody responses.

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“…In 1976, the Japanese house musk shrew ( S. murinus ) was established as a new laboratory animal by Oda and Kondo (1976). Since then, the animal has been used increasingly in laboratory studies (Oda and Kondo, 1977; Dryden and Anderson, 1977; Kurohmaru et al, 1980; Nagai et al, 1984; Tanaka, 1986; Kitamura et al, 1990; Isomura, 1993; Kubo and Isomura, 1996; Yamasaki, 1997; Hoyle et al, 1998; Hijikata et al, 1998; Sakai et al, 2002), and valuable information concerning its biological features has been accumulated.…”

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Anatomical study of the pancreas in the house musk shrew (Suncus murinus), with special reference to the blood supply and innervation

Shimokawa

Akita

et al. 2003

Anat. Rec.

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To examine the macroscopic structure, blood supply, and innervation of the pancreas in the house musk shrew (Suncus murinus), we performed gross anatomical dissection and whole-mount immunostaining of the autonomic nerve of Suncus pancreases based on neurofilament protein (NFP) immunoreactivity. The adult Suncus pancreas is clearly separated into right and left lobes that are not fused. The right lobe of the Suncus pancreas is located in the dorsum of the duodenum and to the right of the common bile duct independently. The right lobe is supplied by branches of the superior mesenteric artery, and is innervated by branches that originate from the superior mesenteric plexus and run along the arterial branches of the superior mesenteric artery. The left lobe occupies 9/10 of the entire pancreas and is located to the left of the common bile duct. It is supplied mainly by branches of the splenic and common hepatic arteries, and is innervated by branches that originate from the celiac plexus and run along the splenic and common hepatic arteries. According to previous studies on the blood supply and innervation of the human pancreas, the right and left lobes of the Suncus pancreas correspond to the pancreatic parts derived from the ventral and dorsal pancreatic buds. The current results suggest that the Suncus pancreas is a suitable experimental model for studying the development of the human pancreas. Anat Rec Part A 273A: 630 -635, 2003.

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Presence and structure of anal and vaginal tonsils in the laboratory shrew (Suncus murinus)

Cited by 6 publications

References 9 publications

The behaviour of licking the everted rectum in shrews (Soricidae, Insectivora)

The behaviour of licking the everted rectum in shrews (Soricidae, Insectivora)

The distribution of T lymphocytes, B lymphocytes, and dendritic‐like cells of the anal tonsil in the laboratory shrew, Suncus murinus

Anatomical study of the pancreas in the house musk shrew (Suncus murinus), with special reference to the blood supply and innervation

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