Evidence map›Paper›PMID 29023691›Full record

ArticleJournal of anatomy2018

Anatomy and development of the extrahepatic biliary system in mouse and rat: a perspective on the evolutionary loss of the gallbladder.

Hiroki Higashiyama, Mami Uemura, Hitomi Igarashi, Masamichi Kurohmaru, Masami Kanai-Azuma, Yoshiakira Kanai

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Journal of anatomy, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 13% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 43 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Elevated circulating bile acids driven erythrocyte osmotic resistance marks hepatobiliary disease.American journal of physiology. Gastrointestinal and liver physiology · 2026
    Article
  5. Review
  6. Harmonizing mouse anatomy terminology: a common language?Mammalian genome : official journal of the International Mammalian Genome Society · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. The Effectiveness ofVascular health and risk management · 2023
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Hiroki HigashiyamaLaboratory of Veterinary Anatomy, The University of Tokyo, Tokyo, Japan.ORCID http://orcid.org/0000-0003-1324-8139
Mami UemuraLaboratory of Veterinary Anatomy, The University of Tokyo, Tokyo, Japan.
Hitomi IgarashiLaboratory of Veterinary Anatomy, The University of Tokyo, Tokyo, Japan.
Masamichi KurohmaruLaboratory of Veterinary Anatomy, The University of Tokyo, Tokyo, Japan.
Masami Kanai-AzumaCenter for Experimental Animals, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.
Yoshiakira KanaiLaboratory of Veterinary Anatomy, The University of Tokyo, Tokyo, Japan.
Tokyo University of Agriculture · JPTokyo Medical and Dental University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The gallbladder is the hepatobiliary organ for storing and secreting bile fluid, and is a synapomorphy of extant vertebrates. However, this organ has been frequently lost in several lineages of birds and mammals, including rodents. Although it is known as the traditional problem, the differences in development between animals with and without gallbladders are not well understood. To address this research gap, we compared the anatomy and development of the hepatobiliary systems in mice (gallbladder is present) and rats (gallbladder is absent). Anatomically, almost all parts of the hepatobiliary system of rats are topographically the same as those of mice, but rats have lost the gallbladder and cystic duct completely. During morphogenesis, the gallbladder-cystic duct domain (Gb-Cd domain) and its primordium, the biliary bud, do not develop in the rat. In the early stages, SOX17, a master regulator of gallbladder formation, is positive in the murine biliary bud epithelium, as seen in other vertebrates with a gallbladder, but there is no SOX17-positive domain in the rat hepatobiliary primordia. These findings suggest that the evolutionary loss of the Gb-Cd domain should be translated simply as the absence of a biliary bud at an early stage, which may correlate with alterations in regulatory genes, such as Sox17, in the rat. A SOX17-positive biliary bud is clearly definable as a developmental module that may be involved in the frequent loss of gallbladder in mammals.

Indexed as

AnimalsBile Ducts, ExtrahepaticGallbladderMiceMice, Inbred C57BLMorphogenesisRatsRats, Sprague-Dawleybiliary tractgallbladdermodularitymouserat

Identifiers

PMID29023691
PMCPMC5735046
OpenAlexW2761786675

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.