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The Role of Gonadal Hormones on Female Extinction Learning
The Role of Gonadal Hormones on Female Extinction Learning
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091532.5
- ISBN
- 9798270231361
- DDC
- 613.94
- 저자명
- Vasquez, Adriana
- 서명/저자
- The Role of Gonadal Hormones on Female Extinction Learning / Adriana Vasquez
- 발행사항
- [Sl] : The University of Texas at Austin, 2025
- 형태사항
- 1 electronic resource (199 pages)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-06, Section: A.
- 주기사항
- Advisors: Lee, Hongjoo J. Committee members: Serafine, Katherine M.; Orsini, Caitlin A.; Monfils, Marie-H.
- 학위논문주기
- - Ph.D. : The University of Texas at Austin, 2025.
- 초록/해제
- 요약Prevailing evidence suggests that women have increased vulnerability for developing substance use disorders (SUD), as compared to men. A wide variety of psychological and environmental factors may influence this sex difference in humans, but similar sex differences are observed in animal models, suggesting a role for biological mechanisms. This results, at least in part, from fluctuating levels of gonadal hormones, such as estradiol (E2) and progesterone (P4), during the menstrual cycle. Rat models of SUD allow us to directly examine the effects of gonadal hormones on behaviors resulting from substance use and show that females display increased behavioral effects to drugs and show higher rates of relapse-like behaviors, as compared to males. A type of treatment for SUD is exposure therapy, which is in part based on extinction, and involves the repeated presentation of a previously learned conditioned stimulus, without subsequent drug intake/administration. Over time, the conditioned response decreases, resulting in "extinction"; yet some individuals still relapse, even after undergoing successful extinction. For females, gonadal hormones may play a role in relapse-like behavior after extinction. Moreover, extinction-based therapies overlook the use of hormonal contraceptives (HCs), which are known to affect the manner and rate of release of E2 and P4, suggesting an important role for HCs in SUD treatments. Previous work investigated the role of HCs on AMPH preference and showed that chronic levonorgestrel (LNG; synthetic progestin) administration, via subdermal LNG implant, led to decreased AMPH preference over the course of extinction. Additional work suggests that hormonal status during extinction and reinstatement influence stimulant-induced responses at reinstatement, but whether the timing of HC administration also influences the response to AMPH is unknown. One caveat, however, is that most models of HC in rodents involve the use of methods that do not reflect the majority of HC use in women (i.e., oral contraception). To address this, a model of oral HC administration was developed by mixing LNG into a vanilla cookie paste that allowed rats to readily consume LNG, without added stress. Then, rats underwent AMPH conditioning and tested for their AMPH-preference over the course of extinction sessions, when oral LNG was administered at three doses (250μg, 500μg, or 2mg). Results showed that LNG at 500μg and 2mg doses decreased AMPH-preference over the course of extinction sessions. Additionally, these doses impacted gonadal function as observed with physiological characteristics of other HC models (e.g., suppression of ovulation via decreased luteinizing hormone, E2 and P4, and decreased uterine horn width). Next, using the same model of oral HC, I tested the timing effects of oral LNG administration on AMPH preference during extinction and/or reinstatement test. LNG's effects on reward and extinction related neural circuits were also investigated after a challenge dose of AMPH during reinstatement. First, I replicated my previous work and showed that LNG during extinction decreased AMPH preference. Further, females that received LNG during extinction, but not during reinstatement, showed AMPH-induced reinstatement. Conversely, females that received LNG during extinction and reinstatement did not show this response, suggesting the importance of HC adherence to prevent relapse. Additionally, neural activity was impacted differently between females that received LNG during extinction versus those that received it during reinstatement. My work highlights the importance of gonadal hormone manipulation and propose a role of HCs in extinction-based treatments to provide targeted treatment for women suffering from SUD.
- 언어주기
- English
- 일반주제명
- Pharmacology
- 일반주제명
- Neurosciences
- 일반주제명
- Biology
- 일반주제명
- Womens studies
- 키워드
- Menstrual cycle
- 키워드
- Gonadal hormones
- 기타저자
- The University of Texas at Austin Psychology
- 기본자료저록
- Dissertations Abstracts International. 87-06A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
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■020 ▼a9798270231361
■040 ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082 ▼a613.94
■1001 ▼aVasquez, Adriana▼eauthor.
■24510▼aThe Role of Gonadal Hormones on Female Extinction Learning ▼cAdriana Vasquez
■260 ▼a[Sl]▼bThe University of Texas at Austin▼c2025
■264 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a1 electronic resource (199 pages)
■336 ▼atext▼btxt▼2rdacontent
■337 ▼acomputer▼bc▼2rdamedia
■338 ▼aonline resource▼bcr▼2rdacarrier
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-06, Section: A.
■500 ▼aAdvisors: Lee, Hongjoo J. Committee members: Serafine, Katherine M.; Orsini, Caitlin A.; Monfils, Marie-H.
■5021 ▼bPh.D.▼cThe University of Texas at Austin▼d2025.
■520 ▼aPrevailing evidence suggests that women have increased vulnerability for developing substance use disorders (SUD), as compared to men. A wide variety of psychological and environmental factors may influence this sex difference in humans, but similar sex differences are observed in animal models, suggesting a role for biological mechanisms. This results, at least in part, from fluctuating levels of gonadal hormones, such as estradiol (E2) and progesterone (P4), during the menstrual cycle. Rat models of SUD allow us to directly examine the effects of gonadal hormones on behaviors resulting from substance use and show that females display increased behavioral effects to drugs and show higher rates of relapse-like behaviors, as compared to males. A type of treatment for SUD is exposure therapy, which is in part based on extinction, and involves the repeated presentation of a previously learned conditioned stimulus, without subsequent drug intake/administration. Over time, the conditioned response decreases, resulting in "extinction"; yet some individuals still relapse, even after undergoing successful extinction. For females, gonadal hormones may play a role in relapse-like behavior after extinction. Moreover, extinction-based therapies overlook the use of hormonal contraceptives (HCs), which are known to affect the manner and rate of release of E2 and P4, suggesting an important role for HCs in SUD treatments. Previous work investigated the role of HCs on AMPH preference and showed that chronic levonorgestrel (LNG; synthetic progestin) administration, via subdermal LNG implant, led to decreased AMPH preference over the course of extinction. Additional work suggests that hormonal status during extinction and reinstatement influence stimulant-induced responses at reinstatement, but whether the timing of HC administration also influences the response to AMPH is unknown. One caveat, however, is that most models of HC in rodents involve the use of methods that do not reflect the majority of HC use in women (i.e., oral contraception). To address this, a model of oral HC administration was developed by mixing LNG into a vanilla cookie paste that allowed rats to readily consume LNG, without added stress. Then, rats underwent AMPH conditioning and tested for their AMPH-preference over the course of extinction sessions, when oral LNG was administered at three doses (250μg, 500μg, or 2mg). Results showed that LNG at 500μg and 2mg doses decreased AMPH-preference over the course of extinction sessions. Additionally, these doses impacted gonadal function as observed with physiological characteristics of other HC models (e.g., suppression of ovulation via decreased luteinizing hormone, E2 and P4, and decreased uterine horn width). Next, using the same model of oral HC, I tested the timing effects of oral LNG administration on AMPH preference during extinction and/or reinstatement test. LNG's effects on reward and extinction related neural circuits were also investigated after a challenge dose of AMPH during reinstatement. First, I replicated my previous work and showed that LNG during extinction decreased AMPH preference. Further, females that received LNG during extinction, but not during reinstatement, showed AMPH-induced reinstatement. Conversely, females that received LNG during extinction and reinstatement did not show this response, suggesting the importance of HC adherence to prevent relapse. Additionally, neural activity was impacted differently between females that received LNG during extinction versus those that received it during reinstatement. My work highlights the importance of gonadal hormone manipulation and propose a role of HCs in extinction-based treatments to provide targeted treatment for women suffering from SUD.
■546 ▼aEnglish
■590 ▼aSchool code: 0227
■650 4▼aPharmacology
■650 4▼aNeurosciences
■650 4▼aBiology
■650 4▼aWomens studies
■653 ▼aSubstance use disorders
■653 ▼aMenstrual cycle
■653 ▼aGonadal hormones
■653 ▼aHormonal contraceptives
■7102 ▼aThe University of Texas at Austin▼bPsychology.▼edegree granting institution.
■7201 ▼aLee, Hongjoo J.▼edegree supervisor.
■7730 ▼tDissertations Abstracts International▼g87-06A.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361193▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


