Neuroglycobiologie du stress périnatal : contribution de l'axe stress RE (réticulum endoplasmique) UPR/N-glycosylation à la vulnérabilité à l'alcool // Neuroglycobiological Mechanisms of Perinatal Stress: Endoplasmic Reticulum Stress/UPR /N-Glycosylation
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ABG-136145
ADUM-69326 |
Thesis topic | |
| 2026-03-03 | Public funding alone (i.e. government, region, European, international organization research grant) |
Université de Lille
Villeneuve d'Ascq cedex - Les Hauts de France - France
Neuroglycobiologie du stress périnatal : contribution de l'axe stress RE (réticulum endoplasmique) UPR/N-glycosylation à la vulnérabilité à l'alcool // Neuroglycobiological Mechanisms of Perinatal Stress: Endoplasmic Reticulum Stress/UPR /N-Glycosylation
- Biology
Stress périnatal & Programmation, Neuroglycobiologie, Stress Réticulum endoplasmique (UPR), N-glycosylation & Récepteurs neurotransmetteurs, Alcoolodépendance, Plasticité synaptique
Perinatal stress & Programming, Neuroglycobiology, Endoplasmic reticulum stress (UPR), N-glycosylation & Neurotransmitter receptors, Alcohol vulnerability, Synaptic plasticity
Perinatal stress & Programming, Neuroglycobiology, Endoplasmic reticulum stress (UPR), N-glycosylation & Neurotransmitter receptors, Alcohol vulnerability, Synaptic plasticity
Topic description
Le stress périnatal (PRS) est un facteur majeur de vulnérabilité aux troubles addictifs et aux altérations du sommeil. Dans notre modèle de rat PRS, nous avons mis en évidence une sensibilité accrue aux faibles concentrations d'éthanol, des profils de consommation et de rechute spécifiques du sexe et de l'âge, ainsi qu'un couplage étroit entre sommeil paradoxal (REM), corticosterone et alcool, accompagné d'une altération de la plasticité dendritique hippocampique, particulièrement marquée chez les femelles. En parallèle, des données préliminaires suggèrent qu'un mécanisme de neuroglycosilation pourrait contribuer à cette vulnérabilité : le PRS dérégulerait l'axe stress du réticulum endoplasmique (RE)–réponse UPR (notamment la voie PERK–eIF2α) et modifierait l'expression de plusieurs enzymes de sialylation (ST3GAL1, ST3GAL4, ST6GAL1) dans l'hippocampe ventral de rats exposés à l'alcool. Ce profil indiquerait une maturation anormale des N-glycanes et des récepteurs synaptiques, susceptible d'altérer des systèmes neurochimiques clés impliqués dans la récompense, le stress et la régulation du sommeil. Dans une perspective de neuroglycobiologie intégrative, les objectifs de cette thèse sont 1) de caractériser comment l'axe stress du RE réponse UPR/N-glycosylation reprogramme durablement les circuits cérébraux (hippocampe, striatum, cortex préfrontal et autres structures d'intérêt) après PRS, et 2) de comprendre comment ces altérations soutiennent des phénotypes alcool-dépendants du sexe et de l'âge. S'appuyant sur une cohorte d'animaux déjà phénotypée (consommation d'alcool, rechute, architecture du sommeil) et sur des structures cérébrales conservées, le/la doctorant/e réalisera des analyses ciblées de l'UPR, des glycogènes et des profils N/0-glycaniques, ainsi que de la glycosylation de récepteurs dopaminergiques, glutamatergiques et GABAergiques. L'intégration multivariée des données moléculaires aux paramètres comportementaux et physiologiques permettra d'identifier des signatures glyco-UPR associées à la résilience ou à la vulnérabilité à l'alcool, ouvrant la voie à de nouvelles perspectives de ciblage thérapeutique des voies neuroglycobiologiques dans les troubles liés à l'alcool.
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Perinatal stress (PRS) is a major risk factor for vulnerability to addictive disorders and sleep alterations. In our PRS rat model, we have shown increased sensitivity to low ethanol concentrations, sex- and age-dependent drinking and relapse profiles, and a tight coupling between rapid eye movement (REM) sleep, corticosterone levels and alcohol intake, together with altered hippocampal dendritic spine plasticity, particularly marked in females. In parallel, preliminary data suggest that a neuroglycosylation mechanism may contribute to this vulnerability: PRS appears to dysregulate the endoplasmic reticulum (ER) stress–unfolded protein response (UPR) axis (notably the PERK–eIF2α pathway) and modify the expression of several sialyltransferases (ST3GAL1, ST3GAL4, ST6GAL1) in the ventral hippocampus of alcohol-exposed rats. This profile indicates abnormal maturation of N-glycans and synaptic receptors, potentially impairing key neurochemical systems involved in reward, stress and sleep regulation. From an integrative neuroglycobiology perspective, the objectives of this PhD project are: (1) to characterize how the ER stress–UPR/N-glycosylation axis durably reprograms brain circuits (hippocampus, striatum, prefrontal cortex and other relevant structures) after PRS, and (2) to understand how these alterations sustain sex- and age-dependent alcohol-related phenotypes. Leveraging an already phenotyped cohort (alcohol intake, relapse, sleep architecture) and preserved brain structures, the PhD student will perform targeted analyses of UPR signaling, glycogenes and N/O-glycan profiles, as well as glycosylation of dopaminergic, glutamatergic and GABAergic receptors. Multivariate integration of molecular, behavioral and physiological datasets will enable the identification of glyco-UPR signatures associated with resilience or vulnerability to alcohol, thereby opening new therapeutic perspectives targeting neuroglycobiological pathways in alcohol-related disorders.
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Début de la thèse : 01/10/2026
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Perinatal stress (PRS) is a major risk factor for vulnerability to addictive disorders and sleep alterations. In our PRS rat model, we have shown increased sensitivity to low ethanol concentrations, sex- and age-dependent drinking and relapse profiles, and a tight coupling between rapid eye movement (REM) sleep, corticosterone levels and alcohol intake, together with altered hippocampal dendritic spine plasticity, particularly marked in females. In parallel, preliminary data suggest that a neuroglycosylation mechanism may contribute to this vulnerability: PRS appears to dysregulate the endoplasmic reticulum (ER) stress–unfolded protein response (UPR) axis (notably the PERK–eIF2α pathway) and modify the expression of several sialyltransferases (ST3GAL1, ST3GAL4, ST6GAL1) in the ventral hippocampus of alcohol-exposed rats. This profile indicates abnormal maturation of N-glycans and synaptic receptors, potentially impairing key neurochemical systems involved in reward, stress and sleep regulation. From an integrative neuroglycobiology perspective, the objectives of this PhD project are: (1) to characterize how the ER stress–UPR/N-glycosylation axis durably reprograms brain circuits (hippocampus, striatum, prefrontal cortex and other relevant structures) after PRS, and (2) to understand how these alterations sustain sex- and age-dependent alcohol-related phenotypes. Leveraging an already phenotyped cohort (alcohol intake, relapse, sleep architecture) and preserved brain structures, the PhD student will perform targeted analyses of UPR signaling, glycogenes and N/O-glycan profiles, as well as glycosylation of dopaminergic, glutamatergic and GABAergic receptors. Multivariate integration of molecular, behavioral and physiological datasets will enable the identification of glyco-UPR signatures associated with resilience or vulnerability to alcohol, thereby opening new therapeutic perspectives targeting neuroglycobiological pathways in alcohol-related disorders.
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Début de la thèse : 01/10/2026
Funding category
Public funding alone (i.e. government, region, European, international organization research grant)
Funding further details
Concours pour un contrat doctoral
Presentation of host institution and host laboratory
Université de Lille
Institution awarding doctoral degree
Université de Lille
Graduate school
446 Biologie Santé de Lille
Candidate's profile
Le projet s'adresse à un(e) candidat(e) titulaire d'un Master 2 en Neurosciences, Biologie-Santé, Biologie Cellulaire et Moléculaire, ou discipline équivalente, avec un intérêt marqué pour les mécanismes neurobiologiques associés au stress, aux addictions et aux modifications post-traductionnelles. Une expérience préalable en biologie moléculaire et cellulaire (qPCR, Western blot, immunodétection) ou en biochimie des protéines serait indispensable. Des connaissances en neurosciences intégratives (plasticité synaptique, circuits de la récompense, stress) ou en glycobiologie constitueront un atout, sans être obligatoires.
Le/la candidat(e) devra faire preuve d'une forte motivation scientifique, d'un sens critique, d'une autonomie progressive, ainsi que d'une capacité à s'organiser, analyser des données et interpréter des résultats expérimentaux. La maîtrise ou la volonté d'apprendre des outils d'analyse statistique et de traitement de données (GraphPad Prism, Python, MetaboAnalyst ou équivalents…) est souhaitée. Une bonne capacité à rédiger en anglais, à communiquer des résultats oralement et à travailler en équipe dans un environnement interdisciplinaire sera nécessaire. La thèse constituant un travail de longue durée, des qualités de rigueur, de persévérance, de curiosité intellectuelle et de respect des règles d'intégrité scientifique sont attendues. Les profils intéressés par une poursuite de carrière en recherche académique ou appliquée (clinique, biotechnologies, neurosciences, santé mentale) trouveront dans ce projet un cadre favorable au développement de leurs compétences.
The position is intended for a highly motivated candidate holding a Master's degree (M2 or equivalent) in Neuroscience, Biology-Health, Cellular and Molecular Biology, or a related field. A strong interest in neurobiology, stress-related mechanisms, addiction, and/or protein post-translational modifications is expected. Prior experience in molecular and cellular biology techniques (e.g., qPCR, Western blot, immunodetection) or protein biochemistry will be valued. Knowledge in integrative neuroscience (synaptic plasticity, reward circuits, stress physiology) or glycobiology is considered a plus but is not mandatory. The ideal candidate will demonstrate rigor, scientific curiosity, critical thinking, and the ability to work both independently and as part of a team. Good organizational skills and the ability to analyze, interpret, and present experimental data are essential. Familiarity with data analysis software (such as GraphPad Prism, Python...) is desirable, as well as good written and oral communication skills in English to facilitate scientific writing and presentation in international contexts. Because the thesis involves long-term experimental and analytical work, the candidate is expected to show perseverance, adaptability, integrity, and a genuine interest in developing high-level scientific expertise. Candidates considering future careers in academic research, biotechnology, or biomedical sciences will find a stimulating environment to develop both technical and conceptual skills.
The position is intended for a highly motivated candidate holding a Master's degree (M2 or equivalent) in Neuroscience, Biology-Health, Cellular and Molecular Biology, or a related field. A strong interest in neurobiology, stress-related mechanisms, addiction, and/or protein post-translational modifications is expected. Prior experience in molecular and cellular biology techniques (e.g., qPCR, Western blot, immunodetection) or protein biochemistry will be valued. Knowledge in integrative neuroscience (synaptic plasticity, reward circuits, stress physiology) or glycobiology is considered a plus but is not mandatory. The ideal candidate will demonstrate rigor, scientific curiosity, critical thinking, and the ability to work both independently and as part of a team. Good organizational skills and the ability to analyze, interpret, and present experimental data are essential. Familiarity with data analysis software (such as GraphPad Prism, Python...) is desirable, as well as good written and oral communication skills in English to facilitate scientific writing and presentation in international contexts. Because the thesis involves long-term experimental and analytical work, the candidate is expected to show perseverance, adaptability, integrity, and a genuine interest in developing high-level scientific expertise. Candidates considering future careers in academic research, biotechnology, or biomedical sciences will find a stimulating environment to develop both technical and conceptual skills.
2026-04-20
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