The Effects of Prostatic Fluid on Functional Characteristics of Cooled Canine Semen" (2015)

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The Effects of Prostatic Fluid on Functional Characteristics of Cooled Canine Semen Louisiana State University LSU Digital Commons LSU Master's Theses Graduate School 2015 The ffecE ts of Prostatic Fluid on Functional Characteristics of Cooled Canine Semen Reto Fritsche Louisiana State University and Agricultural and Mechanical College, [email protected] Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_theses Part of the Veterinary Medicine Commons Recommended Citation Fritsche, Reto, "The Effects of Prostatic Fluid on Functional Characteristics of Cooled Canine Semen" (2015). LSU Master's Theses. 1906. https://digitalcommons.lsu.edu/gradschool_theses/1906 This Thesis is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Master's Theses by an authorized graduate school editor of LSU Digital Commons. For more information, please contact [email protected]. THE EFFECTS OF PROSTATIC FLUID ON FUNCTIONAL CHARACTERISTICS OF COOLED CANINE SEMEN A Thesis Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Master of Science in The Interdepartmental Program in Veterinary Medical Sciences through the Department of Veterinary Clinical Sciences by Reto Fritsche Dr. med. vet., Vetsuisse Faculty University of Bern, 2007 August 2015 The author would like to dedicate this thesis to his family, who enabled him to reach out for the world and pursue his dreams and training far away from home. ii ACKNOWLEDGMENTS The author would like to sincerely thank Dr. Sara Lyle and Dr. Fiona Hollinshead for all their immeasurable support during the entire process of this research project and Dr. David Beehan for valuable input from before the start of this project until its completion. A further thank you to the third committee member Dr. Dale Paccamonti for his helpful questions regarding experimental design. I wish to thank Marilyn Dietrich for performing most of the flow cytometry data acquisition and her flexibility regarding appointments, also Dr. Jill Jenkins for the methodological input and her time and effort to introduce flow cytometry and fluorescent probes to me. Additional acknowledgement goes to Rita Perry for her work regarding supplies and laboratory support, to Micheal Kearney for performing the statistical part of this project and Maxon Graham for her help during sample collection and moral support. Last but not least, the author acknowledges the LSU VCS CORP grant for providing the funds for this study. iii TABLE OF CONTENTS ACKNOWLEDGMENTS …………………………………………………………………………………………………………….iii LIST OF TABLES ………………………………………………………………………………………………………..……………….vi LIST OF FIGURES ………………………………………………………………………………………………..…………………….vii ABSTRACT ………………………………………………………………………………………………………………………………….x CHAPTER 1 INTRODUCTION ...........................................................................................................1 CHAPTER 2 LITERATURE REVIEW ...................................................................................................4 2.1. Canine semen .........................................................................................................................4 2.2. Ejaculation ..............................................................................................................................4 2.3. Semen collection ....................................................................................................................6 2.4. Sperm transport in the bitch reproductive tract ....................................................................7 2.5. Prostatic fluid ..........................................................................................................................9 2.5.1. Characteristics and constituents ..............................................................................9 2.5.2. Effects of PF on semen ...........................................................................................14 2.5.2.1. Effects of PF on in vitro seminal parameters ..........................................14 2.5.2.2. Effects of PF on semen in vivo..................................................................18 2.5.3. Effects of seminal fluids in other species ...............................................................19 2.5.4. Summary of PF effects in dogs ...............................................................................21 2.6. Fertility ..................................................................................................................................22 2.6.1. Stud dog fertility ....................................................................................................22 2.6.2. Effect of prostatic disease on fertility.....................................................................23 2.7. Semen evaluation..................................................................................................................24 2.7.1. Motility ...................................................................................................................24 2.7.2. Morphology ............................................................................................................25 2.7.3. Concentration ........................................................................................................26 2.7.4. Ancillary semen tests .............................................................................................28 2.7.4.1. Plasma membrane integrity ....................................................................28 2.7.4.2. Acrosome integrity ..................................................................................30 2.7.4.3. Sperm chromatin structure assay (SCSA) ................................................31 2.8. Cooling of canine semen .......................................................................................................33 2.9. Cryopreservation ..................................................................................................................36 2.9.1. Ice crystal formation ..............................................................................................37 2.9.2. Osmotic stress ........................................................................................................37 2.9.3. Reactive oxygen species .........................................................................................39 2.9.4. Apoptotic-like changes ...........................................................................................40 iv CHAPTER 3 THE EFFECTS OF PROSTATIC FLUID ON FUNCTIONAL CHARACTERISTICS OF COOLED CANINE SEMEN ............................................................................................................................42 3.1. Introduction ..……………………………………………………………………………………………………………………42 3.2. Materials and methods .......……………………………………………………………………………………………..42 3.2.1. Semen and PF collection ........................................................................................43 3.2.2. Semen processing overview ..................................................................................44 3.2.3. Concentration ........................................................................................................46 3.2.4. Morphology ............................................................................................................46 3.2.5. pH ...........................................................................................................................46 3.2.6. Cryopreservation ...................................................................................................46 3.2.7. Motility .......…………………………………………………………………………………………….…………47 3.2.8. Hypo-osmotic swelling test (HOST) ........................................................................47 3.2.9. Flow cytometry ......................................................................................................48 3.2.9.1. Plasma membrane stability .....................................................................48 3.2.9.2. Acrosome reactivity ................................................................................49 3.2.9.3. Sperm chromatin structure assay (SCSA) ................................................50 3.2.10. Statistical analysis ................................................................................................51 3.3. Results ……………………………………………………………………………………………………………………………..52 3.4. Discussion .............................................................................................................................63 CHAPTER 4 CONCLUSIONS ...........................................................................................................74 REFERENCES .................................................................................................................................76 APPENDIX A THE CASA SPERM VISION® 3.0. PARAMETERS USED FOR CANINE SPERMATOZOAL ANALYSIS .………………………………………………......……………………………………………………………….…………90 APPENDIX B FLOW CYTOMETRIC GATING .....…………………………………………………………………………..91 APPENDIX C PERMISSIONS FOR USE OF COPYRIGHTED MATERIAL..............................................95 VITA ..………………………………………………………………………………………………………………………………………96 v LIST OF TABLES Table 2.1. Mean (and range if given) biochemical concentrations in first, second and third fraction from 3 dogs, post centrifugation (Adapted from Bartlett, 1962b).....……………….…………11 Table 2.2. Mean (± SD) biochemical
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