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Egyptien S, Dewals B, Ectors F, Brutinel F, Ponthier J, Deleuze S. Validation of Calcein Violet as a New Marker of Semen Membrane Integrity in Domestic Animals. Animals (Basel) 2023; 13:1874. [PMID: 37578748 PMCID: PMC10252073 DOI: 10.3390/ani13111874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 05/24/2023] [Accepted: 06/02/2023] [Indexed: 08/15/2023] Open
Abstract
Many fluorochromes routinely used in semen quality analysis emit in the green and red channels, limiting their possible combination for multiple parameter analysis. The use of fluorophores emitting in different light channels broadens the possibilities of combination to expand the range of simultaneously evaluated criteria. This is of great interest in cases of small ejaculated volumes, such as those naturally occurring in roosters, small dog breeds and drones (Apis mellifera). The purpose of this experiment is to establish Calcein Violet (CaV), a blue fluorochrome, as a marker of viability and acrosomal integrity in domestic animals in order to free the red and green channels. SYBR®14/Propidium Iodide (PI) was used as reference dye, heat-treated samples as negative controls, serial staining combination for validation and epifluorescence microscopy for observation. Dead spermatozoa marked in red with PI showed no blue fluorescence either from the head or the tail. Live spermatozoa showed a decreasing blue emission from head to tail when single stained with CaV. Unreacted acrosomes showed intense blue fluorescence irrespective of plasma membrane integrity. This needs to be further confirmed for species with small and difficult to observe heads. Establishment of CaV as a marker of membrane integrity by fluorescence microscopy is a decisive first step towards further technical development and use with flow cytometry.
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Affiliation(s)
- Sophie Egyptien
- Fundamental and Applied Research for Animals and Health Research Unit (FARAH), Comparative Veterinary Medicine, Faculty of Veterinary Medicine, University of Liège, Avenue de Cureghem 1, 4000 Liège, Belgium (J.P.)
| | - Benjamin Dewals
- FARAH, Veterinary Public Health, Faculty of Veterinary Medicine, University of Liège, Avenue de Cureghem 1, 4000 Liège, Belgium
| | - Fabien Ectors
- FARAH, Veterinary Public Health, Faculty of Veterinary Medicine, University of Liège, Avenue de Cureghem 1, 4000 Liège, Belgium
| | - Flore Brutinel
- Fundamental and Applied Research for Animals and Health Research Unit (FARAH), Comparative Veterinary Medicine, Faculty of Veterinary Medicine, University of Liège, Avenue de Cureghem 1, 4000 Liège, Belgium (J.P.)
| | - Jérôme Ponthier
- Fundamental and Applied Research for Animals and Health Research Unit (FARAH), Comparative Veterinary Medicine, Faculty of Veterinary Medicine, University of Liège, Avenue de Cureghem 1, 4000 Liège, Belgium (J.P.)
| | - Stéfan Deleuze
- Fundamental and Applied Research for Animals and Health Research Unit (FARAH), Comparative Veterinary Medicine, Faculty of Veterinary Medicine, University of Liège, Avenue de Cureghem 1, 4000 Liège, Belgium (J.P.)
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Cryopreservation of Siberian tiger ( Panthera tigris altaica) epididymal spermatozoa: pilot study of post-thaw sperm characteristics. JOURNAL OF ANIMAL REPRODUCTION AND BIOTECHNOLOGY 2022. [DOI: 10.12750/jarb.37.2.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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