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PHOTOPERIODIC REGULATION OF THE FEMALE REPRODUCTIVE SYSTEM IN THE SYRIAN HAMSTER (OVARY, PINEAL, HORMONES, PITUITARY). Item Type text; Dissertation-Reproduction (electronic) Authors HAUSER, URSULA ESTHER. Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 27/09/2021 09:59:21 Link to Item http://hdl.handle.net/10150/183862 INFORMATION TO USERS This reproduction was made from a copy of a manuscript sent to us for publication and microfilming. While the most advanced technology has been used to pho tograph and reproduce this manuscript, the quality of the reproduction is heavily dependent upon the quality of the material submitted. Pages in any manuscript may have indistinct print. 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For an additional charge, all photographs are available in black and white stan.dard 35mm slide format. * *For more information about black and white slides or enlarged paper reproductions, please contact the Dissertations Customer Services Department. Dissertation UMI• • Information Service University Microfilms International A Bell & Howell Information Company . 300 N. Zeeb Road, Ann Arbor, Michigan 48106 8623851 Hauser, Ursula Esther PHOTOPERIODIC REGULATION OF THE FEMALE REPRODUCTIVE SYSTEM IN THE SYRIAN HAMSTER The University of Arizona PH.D. 1986 University Microfilms International 300 N. Zeeb Road, Ann Arbor, MI48106 Copyright 1986 by Hauser, Ursula Esther All Rights Reserved PLEASE NOTE: In a" cases this material has been filmed in the best possible way from the available copy. Problems encountered with this document have been identified here with a check mark_..f_. 1. Glossy photographs or pages-.i.. 2. Colored illustrations, paper or print v/' 3. 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Other__________________________ _ University Microfilms International PHOTOPERIODIC REGULATION OF THE FEMALE REPRODUCTIVE SYSTEM IN THE SYRIAN HAMSTER by Ursula Esther Hauser A Dissertation Submitted to the Faculty of the DEPARTMENT OF ANATOMY In Partial Fulfillment of the Requirements For the Degree of DOCTOR OF PHILOSOPHY In the Graduate College THE UNIVERSITY OF ARIZONA 1 986 Copyright 1986 Ursula Esther Hauser THE UNIVERSITY OF ARIZONA GRADUATE COLLEGE As members of the Final Examination Committee, we certify that we have read the dissertation prepared by ------------------------------------------Ursula Esther Hauser entitled Photoperiodic Regulation of the Female Reproductive System in the Syrian Hamster and recommend that it be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy ------------------~~------------------------------- d I 9-' 0, 118':...t Date ; l 7PI/rr{.. Date Date Final approval and acceptance of this dissertation is contingent upon the candidate's sUbmission of the final copy of the dissertation to the Graduate College. I hereby certify that I have read this dissertation prepared under my direction and recommend that it be accepted as fulfilling the dissertation requirement. D~~r~on Director Date~ STATEMENT BY AUTHOR This dissertation has been subm·itted in partial fulfillment of requirements for an advanced degree at the University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. Brief quotations from this dissertation are allow able without special permission, provided that accurate acknowledgment of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the copyright holder. SIGNED: t.L.rS~ e '#0' ~~ ACKNOWLEDGEMENTS I would like to express my deep gratitude to my advisor, Dr. Bryant Benson. His guidance, great patience and generosity made my graduate education a very special and invaluable experience. I also would like to thank Dr. Philip H. Krutzsch, Dr. David E. Blask and Dr. Christopher A. Leadem for their service on my committee, individual contributions to my education as a researcher, and last but not least, for their friendship, which I cherish and which helped me greatly in the persuit of my goal. Finally, I would like to thank the many members of the Department of Anatomy who contributed to my education, provided technical assistance, or in other ways made my life as a graduate student more enjoyable. iii ... - ...__ ... _.•. _-- ---------_._-_._._............. - TABLE OF CONTENTS Page LIST OF .I LLUSTRATI ONS . vii LIST OF TABLES . xi ABSTRACT . • xii 1. INTRODUCTION AND BACKGROUND. 1 Origin of the Hamster as an Experimental Animal 1 The Female Reproductive System • . .. 3 Estrous Cycle •.••.•.•••.••. 3 Follicular Development and Steroidogenesis 7 Follicular Atresia • • • • • • • • • • 10 Interstitium . • • . • . • . .. 12 Neural Control of the Female Reproductive System . • . • • • . • . • • . • .. 13 Neuroregulation of Gonadotropin Secretion. 13 Gonadotropin Regulation in the Female Hamster • . • • . • •. ••••.. 21 Control of Gonadotropins at the Pituitary Level.. .. ...... 25 Regulation of Prolactin • . • • • • • . • . 28 Suprachiasmatic Nucleus and Circadian Rhythms • . • . • . • • . 32 Seasonal Breeding and the Pineal Gland . 37 PhotoperioG and the Female Hamster • • •• 41 2. STATEMENT OF THE PROBLEM AND SPECIFIC AIMS 47 3. EXPERIMENT I: A HISTOCHEMICAL STUDY OF THE SITES OF STEROID SYNTHESID IN BLINDED, FEMALE HAMSTERS •.. 49 Introduction • • • • • • • . • 49 Materials and Methods. • • . • •. 50 Observations ••• . • . • • . • . .. 52 Discussion . • • . • • • • • • • . 55 Pl ates . • • . • • • . •• 59 iy v TABLE OF CONTENTS--Continued Page 4. EXPERIMENT II: RAPID CESSATION OF ESTROUS CYCLICITY AND DEPRESSED CASTRATION RESPONSE IN SHORT-PHOTOPERIOD TREATED INBRED LSH/SsLak HAMSTERS. 63 Introduction ..•••••••. 63 Materials and Methods 63 Results ••••••. 66 Discussion ....•..•. 67 Figures ••...•. 73 5. EXPERIMENT III: EARLY SHORT PHOTOPERIOD EFFECTS IN FEMALE LSH/SsLak GOLDEN SYRIAN HAMSTERS • • . • . • • • . 80 Introduction .•.... • . •• 80 Materials and Methods. • • • • • • • . 81 Results. • . • • . 83 Discussion .••••• .•• ••. 85 Table 1. ...... ........ 92 Figures . • . • • . • . 93 6. EXPERIMENT IV: HORMONAL CHANGES PRECEEDING THE SHORT PHOTOPERIOD-INDUCED ANOVULATORY CONDITION IN LSH/SsLak HAMSTERS . • . • • . • • . 101 Introduction .•. •. 101 Materials and Methods. • • • • • • • • 102 Results ..• • .•• . • • • 106 Discussion •.. 110 Table 1. .... .. • 117 Figures ...••••.•• · 118 7. EXPERIMENT V: SHORT PHOTOPERIOD DEPRESSES CASTRATION RESPONSE AND MAY ALTER STEROID FEEDBACK SENSITIVITY IN FEMALE LSH/SsLak HAMSTERS .•. 131 Introduction •••••. · 131 Materials and Methods. • 132 vi TABLE OF CONTENTS--Continued Page Results .............. • 134 .Discussion ••• • 136 Table 1. .... • • • • 141 Figures •••••••••••••• • • • . 142 8. SUMMARY DISCUSSION . • 148 9. REFERENCES 164 LIST OF ILLUSTRATIONS Page Experiment I. Plate 1. NADH Diphorase Activity in the Ovary of a Control Hamster on Diestrus II •• . 59 2. Glucose-6-Phosphate-Dehydrogenase Activity as Seen on Proestrus in a Control Ovary • 59 3. 3-Beta-Hydroxysteroid Dehydrogenase Activity Observed on Proestrus in the Ovary of a Control Animal .••• •.••••• 60 4. NADH Diaphorase Activity in the Ovary of a Blinded Acyclic Animal •••••••. 60 5. Glucose-6-Phosphate-Dehydrogenase A~tivity Seen in the Ovary of a Blind Animal .. 61 6. 3-Beta-Hydroxysteroid Dehydrogenase Activity Seen in the Ovary of a Blind Hamster 61 7. Hand E Section of an Ovary from an Animal on Proestrus Day. • . • • • • • • . • . • 62 8. Hand E Section from the Ovary of a Blinded Animal ...•.....•••.. 62 Experiment II. Figure 1. Effects of SP on Estrous Activity ••••. 73 2. Serum LH Profiles of SP- and LP- Exposed Ovariectomized Animals During the First and Second Postcannulation