Aortic Cross-Clamping to Provide Differential Fixation by Perfusion

Mackenzie M. Moore, Emilyn U. Alejandro

Research output: Contribution to journalArticlepeer-review

Abstract

An intricate network of regulation between the brain and the pancreas modulates hormone secretion and organ function. Dysfunction of the brain-pancreas axis occurs in disease states such as diabetes and pancreatitis. Given the delicate nature of the mouse brain, procurement for tissue and cellular analysis is facilitated by fixation by perfusion with paraformaldehyde (PFA). The brain is hardened by PFA during the preservation process, but this hardening also occurs in the pancreas, as well as the remainder of the intra-abdominal organs. This hardening makes the pancreas friable and difficult to dissect without damaging and fragmenting the organ. Additionally, this fixation may preclude the ability to perform analytic techniques such as western blot and quantitative PCR (qPCR) simultaneously. Performing a simple cross-clamping of the thoracic aorta allows for differential perfusion of organs and maximal use of limited samples from a single animal. The brain can be perfused with PFA without compromising tissue collection of the pancreas and other intra-abdominal organs. This simple maneuver allows for greater tissue collection and analysis per mouse in studies evaluating the brain-pancreas or brain-gut axis.

Original languageEnglish (US)
Article numbere81
JournalCurrent Protocols
Volume1
Issue number3
DOIs
StatePublished - Mar 2021

Bibliographical note

Funding Information:
This work was supported by the National Institutes of Health Grant NIDDK (R21DK112144 and R01DK115720 to EUA and T32DK108733 to MM). We would also like to thank Mr. Ronald Mark Ygona for his assistance with artwork and figure design.

Publisher Copyright:
© 2021 Wiley Periodicals LLC

Keywords

  • aortic cross-clamping
  • brain
  • brain-pancreas axis
  • cross-clamping
  • metabolism
  • mouse
  • pancreas

PubMed: MeSH publication types

  • Journal Article

Fingerprint Dive into the research topics of 'Aortic Cross-Clamping to Provide Differential Fixation by Perfusion'. Together they form a unique fingerprint.

Cite this