The case for considering the term ‘mitochondrial vesicle’ as a misnomer in publications about assisted reproductive technologies (ART) for amphibians

Author:

Browne Robert K.ORCID,Venu GovindappaORCID,Kaurova Svetlana A.ORCID

Abstract

The term ‘mitochondrial vesicle’ was first used in 2003 in a description of anuran sperm and persists to this day throughout the literature on assisted reproductive technologies (ART) for amphibians. In the present paper, we argue that the term is inappropriate because the widely accepted definition of a ‘vesicle’ refers to an integral structure with an enclosing lipid bilayer/membrane. Moreover, there are no electron micrographs that show a vesicular structure encapsulating mitochondria on amphibian sperm heads in the literature. In fact, in 1993, the mitochondria in the anuran sperm head had been described as positioned in ‘mitochondrial collars’ or ‘mitochondrial sheaths’ surrounded by the plasma membrane of the sperm head. On the other hand, mitochondrial-derived vesicles are defined as vesicles shed from mitochondria surfaces, potentially creating confusion. Therefore, our view is that the term ‘mitochondrial vesicle’ should be avoided in describing the positioning of mitochondria on sperm.

Publisher

CSIRO Publishing

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