Ingénierie de 'thérapies vivantes' bactériennes programmables pour le ciblage tumoral et la modulation immunitaire // Engineering programmable bacterial living therapeutics for tumor targeting and immune modulation
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ABG-137601
ADUM-68756 |
Thesis topic | |
| 2026-04-03 |
Université de Bordeaux
Bordeaux cedex - Nouvelle Aquitaine - France
Ingénierie de 'thérapies vivantes' bactériennes programmables pour le ciblage tumoral et la modulation immunitaire // Engineering programmable bacterial living therapeutics for tumor targeting and immune modulation
- Biology
thérapies vivantes, immunothérapie, protéines recombinantes, biotechnologie, nanomachines bactériennes
living therapeutics, immunotherapy, recombinant protein, biotechnology, bacterial nanomachines
living therapeutics, immunotherapy, recombinant protein, biotechnology, bacterial nanomachines
Topic description
La thérapie bactérienne représente une approche prometteuse en oncologie, reposant sur la capacité naturelle de certaines bactéries à coloniser spontanément et préférentiellement les tumeurs en raison des caractéristiques spécifiques du microenvironnement tumoral, telles que l'hypoxie, l'immunosuppression locale ou une reprogrammation métabolique favorable à la croissance bactérienne. Historiquement, les effets anti-cancéreux de cette stratégie reposaient principalement sur la toxicité intrinsèque des bactéries, entraînant une destruction directe des cellules tumorales ou une activation immunitaire non spécifique. Dans ce projet, nous proposons de dépasser ces approches classiques en développant des souches bactériennes génétiquement modifiées capables de produire in situ des protéines thérapeutiques au sein de la tumeur. En particulier, nous avons mis au point des souches capables de synthétiser et de sécréter des protéines immunothérapeutiques and anti-tumorales, dans le but d'induire une réponse anti-tumorale locale efficace tout en limitant les effets secondaires systémiques. Un objectif central de ce travail sera de valider la fonctionnalité et l'activité biologique des constructions thérapeutiques après leur production et leur sécrétion par les bactéries. En parallèle, nous cherchons à développer des mécanismes de détection du microenvironnement tumoral, tels que des bio-capteurs, permettant un contrôle conditionnel et spécifique de l'expression des protéines thérapeutiques. Enfin, l'efficacité de ces systèmes bactériens programmés sera évaluée sur des modèles expérimentaux in vitro et in vivo afin de valider leur capacité de colonisation tumorale, leur activité thérapeutique et leur impact global sur la progression tumorale.
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Bacterial therapy represents a promising approach in cancer treatment, based on the natural ability of certain bacteria to spontaneously and preferentially colonize tumors due to the specific characteristics of the tumor microenvironment, such as hypoxia, local immunosuppression, or a metabolic reprogramming that is favorable to bacterial growth. Traditionally, the anti-cancer effects of bacterial therapy have relied mainly on the intrinsic toxicity of the bacteria, leading to direct tumor cell killing or nonspecific immune activation. In this project, we aim to go beyond these classical approaches by developing genetically engineered bacterial strains capable of producing therapeutic proteins directly within the tumor. In particular, we have developed bacterial strains able to synthesize and secrete immunotherapeutic and anti-tumor proteins, with the goal of inducing a strong and localized anti-tumor response while limiting systemic side effects. A key objective of this work will be to validate the functional integrity and biological activity of these engineered therapeutic constructs after their production and secretion by the bacteria. In parallel, we aim to develop tumor-sensing mechanisms, such as biosensors, enabling bacteria to detect specific signals from the tumor microenvironment and conditionally activate therapeutic protein expression. Finally, the efficacy and relevance of these engineered bacterial systems will be evaluated using appropriate in vitro and in vivo tumor models.
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Début de la thèse : 01/10/2026
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Bacterial therapy represents a promising approach in cancer treatment, based on the natural ability of certain bacteria to spontaneously and preferentially colonize tumors due to the specific characteristics of the tumor microenvironment, such as hypoxia, local immunosuppression, or a metabolic reprogramming that is favorable to bacterial growth. Traditionally, the anti-cancer effects of bacterial therapy have relied mainly on the intrinsic toxicity of the bacteria, leading to direct tumor cell killing or nonspecific immune activation. In this project, we aim to go beyond these classical approaches by developing genetically engineered bacterial strains capable of producing therapeutic proteins directly within the tumor. In particular, we have developed bacterial strains able to synthesize and secrete immunotherapeutic and anti-tumor proteins, with the goal of inducing a strong and localized anti-tumor response while limiting systemic side effects. A key objective of this work will be to validate the functional integrity and biological activity of these engineered therapeutic constructs after their production and secretion by the bacteria. In parallel, we aim to develop tumor-sensing mechanisms, such as biosensors, enabling bacteria to detect specific signals from the tumor microenvironment and conditionally activate therapeutic protein expression. Finally, the efficacy and relevance of these engineered bacterial systems will be evaluated using appropriate in vitro and in vivo tumor models.
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Début de la thèse : 01/10/2026
Funding category
Funding further details
Contrat doctoral libre
Presentation of host institution and host laboratory
Université de Bordeaux
Institution awarding doctoral degree
Université de Bordeaux
Graduate school
154 Sciences de la Vie et de la Santé
Candidate's profile
Étudiant⋅e ayant validé un master en biologie avec de préférence une ou plusieurs compétences en biochimie, immunologie, génétique bactérienne, microbiologie, biotechnologies.
Student with a master degree in biology preferentially with an emphasis on biochemistry, immunology, bacterial genetics, microbiology and/or bioengineereing.
Student with a master degree in biology preferentially with an emphasis on biochemistry, immunology, bacterial genetics, microbiology and/or bioengineereing.
2026-05-20
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