Searchable abstracts of presentations at key conferences in endocrinology

ea0037s7.3 | Novel mechanisms of central weight regulation | ECE2015

Hypothalamic tanycytes in metabolic regulation

Prevot Vincent

The survival of an organism relies on its ability to promptly, effectively and reproducibly communicate with brain networks that control food intake and energy homeostasis. To achieve this, circulating factors of hunger and satiety reflecting nutrient availability must cross the blood-brain barrier (BBB) to reach effectors neurons. A defect in this process invariably leads to uncontrolled body weight. Here we will discuss the key role played in this process by a peculiar type ...

ea0025s7.2 | Eat, bond, reproduce – what the hypothalamus dictates | SFEBES2011

The role of tanycytes in the regulation of the reproductive axis

Prevot Vincent

The neuroendocrine fraction of GnRH neurons sends axon to the median eminence of the hypothalamus where they release their neurohormone into the pituitary portal vasculature to regulate the reproductive axis. Specialized unciliated ependymal cells named tanycytes, which line the floor of the third ventricle, confer to the median eminence its peculiar cytoarchitecture. Tanycyte cell bodies are located in the ventral border of the third ventricle but they also send processes to ...

ea0081p140 | Pituitary and Neuroendocrinology | ECE2022

Efficacy of lanreotide 120 mg primary therapy on tumor shrinkage and ophthalmologic symptoms in acromegaly after one month

Benderradji Hamza , Elise Vernotte , Ares Gustave Soto , Jean Philippe Woillez , Romain Perbet , Melodie-Anne Karnoub , Benoit Soudan , Arnaud Jannin , Assaker Richard , Luc Buee , Prevot Vincent , Claude-Alain Maurage , Pascal Pigny , Marie-Christine Vantyghem , Emilie Merlen , Cortet Rudelli Christine

Introduction: Few studies to date have attempted to evaluate the early efficacy of first-generation somatostatin analogs in somatotroph macroadenomas.Objective: To investigate the short-term efficacy of primary therapy with lanreotide 120 mg on tumor shrinkage and ophthalmologic symptoms in newly diagnosed patients with acromegaly.Design and patients: This single-center retrospective study included 21 patients who were newly diagno...

ea0081p700 | Reproductive and Developmental Endocrinology | ECE2022

Fetal exposure to anti-müllerian hormone triggers a transgenerational epigenetic transmission of polycystic ovary syndrome (PCOS) defects in adulthood

Nour El Houda Mimouni , Paiva Isabel , Barbotin Anne-Laure , Ezzahra Timzoura Fatima , Plassard Damien , Le Gras Stephanie , Ternier Gaetan , Pigny Pascal , Catteau-Jonard Sophie , Simon Virginie , Prevot Vincent , Boutillier Anne-Laurence , Giacobini Paolo

Polycystic ovary syndrome (PCOS) is the most common endocrine and metabolic disorder affecting women in reproductive age. Women with PCOS exhibit 2-3x higher levels of circulating Anti-Müllerian Hormone (AMH) as compared to healthy women and it is unclear if the elevation of AMH is a bystander effect or is driving the condition. Moreover, PCOS has a strong heritable component, however the etiopathology of the disease and the mechanisms underlying its transmission remain t...

ea0081p182 | Reproductive and Developmental Endocrinology | ECE2022

Defining reference ranges for serum anti-Müllerian hormone (AMH) on a large cohort of normozoospermic adult men highlights new potential physiological functions of AMH on FSH secretion and sperm motility

Benderradji Hamza , Anne-Laure Barbotin , Maryse Leroy-Billiard , Julie Prasivoravong , Francois Marcelli , Christine Decanter , Geoffroy Robin , Valerie Mitchell , Jean-Marc Rigot , Antonino Bongiovanni , Florent Sauve , Luc Buee , Claude-Alain Maurage , Maryse Cartigny , Arnauld Villers , Vincent Prevot , Sophie Catteau-Jonard , Nicolas Sergeant , Paolo Giacobini , Pascal Pigny , Clara Leroy

Background: Few studies to date have attempted to measure serum anti-Müllerian hormone (AMH) levels in adult men, and solid references ranges have not yet been defined on a large cohort.Objective: In this study, we aimed to first establish the reference ranges for serum AMH and AMH-to-total testosterone ratio (AMH/tT) in adult males. Secondly, we investigated the relationship between serum AMH and both reproductive hormones and semen parameters....

ea0090oc7.1 | Oral Communications 7: Pituitary and Neuroendocrinology 2 | ECE2023

Investigating intranasal kisspeptin as a novel, effective and preferable route of delivery using human, rodent and pharmaceutical models

Mills Edouard G , Swedrowska Magda , Delli Virginia , Chachlaki Konstantina , Sergio Mauro , Decoster Laurine , Ternier Gaetan , Thurston Layla , Phylactou Maria , Patel Bijal , Yang Lisa , Clarke Sophie , Muzi Beatrice , Alexander Emma , Choudhury Muhammad , Bech Paul , Abbara Ali , Forbes Ben , Giacobini Paolo , Prevot Vincent , Comninos Alexander , Dhillo Waljit

Background: Kisspeptin is a critical activator of hypothalamic GnRH neurons and is essential for reproductive health. Emerging data reveals that kisspeptin-based therapeutics have substantial potential to treat reproductive, psychosexual and bone disorders. However, current delivery is limited to the subcutaneous or intravenous routes, presenting barriers to development. Alternative routes of administration would overcome this and capitalise on the benefits of kisspeptin-based...

ea0094oc4.4 | Reproductive Endocrinology | SFEBES2023

Intranasal kisspeptin: a novel, effective and non-invasive approach to stimulate reproductive hormones in patients with reproductive disorders

G Mills Edouard. , Delli Virginia , Chachlaki Konstantina , Silva Mauro SB. , Decoster Laurine , Ternier Gaetan , Thurston Layla , Phylactou Maria , Patel Bijal , Yang Lisa , Clarke Sophie A. , Alexander Emma , Choudhury Muhammad , Bech Paul , Abbara Ali , Swedrowska Magda , Forbes Ben , Giacobini Paolo , Prevot Vincent , Comninos Alexander N. , Dhillo Waljit S.

Background: Kisspeptin is a potent regulator of GnRH neurons with potential to treat reproductive and psychosexual disorders. However, administration is limited to the subcutaneous or intravenous routes. These invasive routes limit clinical development. Herein, we comprehensively examine the translational potential of intranasal kisspeptin administration for the first-time using rodent, human and pharmaceutical studies.Methods:</...

ea0094p371 | Neuroendocrinology and Pituitary | SFEBES2023

GnRH neuronal disruption and hypotestosteronemia in COVID-19

Sauve Florent , Nampoothiri Sreekala , Clarke Sophie , Fernandois Daniela , Fernando Ferreira Coelho Caio , Dewisme Julie , G Mills Edouard , Ternier Gaetan , Cotellessa Ludovica , Iglesias Garcia Cristina , Mueller-Fielitz Helge , Lebouvier Thibaud , Perbet Romain , Florent Vincent , Baroncini Marc , Sharif Ariane , Ereno-Orbea June , Mercado-Gomez Maria , Palazon Asis , Mattot Virginie , Pasquier Florence , Catteau-Jonard Sophie , Martinez-Chantar Maria , Hrabovszky Erik , Jourdain Merce , Deplanque Dominique , Morelli Annamaria , Guarnier Giulia , Storme Laurent , Robil Cyril , Trottein Francois , Nogueiras Ruben , Schwaninger Markus , Pigny Pascal , Poissy Julien , Chachlaki Konstantina , Maurage Claude-Alain , Giacobini Paolo , S Dhillo Waljit , Rasika S , Prevot Vincent

Loss of gonadotropin-releasing hormone (GnRH) and cognitive deficits have recently been demonstrated by our group in conditions including Down syndrome and Alzhiemer’s disease. In some patients with COVID-19, olfactory and cognitive alterations persist, and persistent hypotestosteronemia in SARS-CoV-2-infected men could be a consequence of deficient GnRH. To understand whether neuroinvasion of GnRH system by SARS-CoV-2 could explain some post-COVID symptoms and thus resul...