Comparative analysis of fixation and embedding techniques for optimized histological preparation of zebrafish.

Autor: Copper JE; Jake Gittlen Cancer Research Laboratories, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA., Budgeon LR; Jake Gittlen Cancer Research Laboratories, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA., Foutz CA; Jake Gittlen Cancer Research Laboratories, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA., van Rossum DB; Jake Gittlen Cancer Research Laboratories, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA., Vanselow DJ; Jake Gittlen Cancer Research Laboratories, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA., Hubley MJ; Jake Gittlen Cancer Research Laboratories, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA., Clark DP; Jake Gittlen Cancer Research Laboratories, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA., Mandrell DT; KTM Research, 18280 SW 108th Ave., Tualatin, OR 97062, USA., Cheng KC; Jake Gittlen Cancer Research Laboratories, Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA. Electronic address: kcheng@psu.edu.
Jazyk: angličtina
Zdroj: Comparative biochemistry and physiology. Toxicology & pharmacology : CBP [Comp Biochem Physiol C Toxicol Pharmacol] 2018 Jun; Vol. 208, pp. 38-46. Date of Electronic Publication: 2017 Nov 20.
DOI: 10.1016/j.cbpc.2017.11.003
Abstrakt: In recognition of the importance of zebrafish as a model organism for studying human disease, we have created zebrafish content for a web-based reference atlas of microanatomy for comparing histology and histopathology between model systems and with humans (http://bio-atlas.psu.edu). Fixation, decalcification, embedding, and sectioning of zebrafish were optimized to maximize section quality. A comparison of protocols involving six fixatives showed that 10% Neutral Buffered Formalin at 21°C for 24h yielded excellent results. Sectioning of juveniles and adults requires bone decalcification; EDTA at 0.35M produced effective decalcification in 21-day-old juveniles through adults (≥~3Months). To improve section plane consistency in sets of larvae, we have developed new array casting molds based on the outside contours of larvae derived from 3D microCT images. Tissue discontinuity in sections, a common barrier to creating quality sections of zebrafish, was minimized by processing and embedding the formalin-fixed zebrafish tissues in plasticized forms of paraffin wax, and by periodic hydration of the block surface in ice water between sets of sections. Optimal H&E (Hematoxylin and Eosin) staining was achieved through refinement of standard protocols. High quality slide scans produced from glass histology slides were digitally processed to maximize image quality, and experimental replicates posted as full slides as part of this publication. Modifications to tissue processing are still needed to eliminate the need for block surface hydration. The further addition of slide collections from other model systems and 3D tools for visualizing tissue architecture would greatly increase the utility of the digital atlas.
(Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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