مؤتمر
Warburg-effect phenotype: Regulation by acidification and lactate accumulation
| العنوان: | Warburg-effect phenotype: Regulation by acidification and lactate accumulation |
|---|---|
| المؤلفون: | Kolkman, Maxime |
| المساهمون: | ICBMS - Institut de Chimie et Biochimie des Macro et Supramolécules |
| المصدر: | EDT Chimie, Liège, Belgium [BE], 26/01/2024 |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Warburg-effect, Lactic acidosis, Metabolism, Real-time NMR, Human health sciences, Oncology, Sciences de la santé humaine, Oncologie |
| الوصف: | Lactate accumulation and acidification in tumours are a cancer hallmark associated with the Warburg effect. Lactic acidosis correlates with cancer malignancy, and the benefit it offers to tumours has been the subject of numerous hypotheses. Strikingly, lactic acidosis enhances cancer cell survival to environmental glucose depletion by repressing high-rate glycolysis and lactic fermentation, and promoting an oxidative metabolism involving reactivated respiration. We used real-time NMR to evaluate how cytosolic lactate accumulation up to 40 mM and acidification up to pH 6.5 individually impact glucose consumption, lactate production and pyruvate evolution in isolated cytosols. We useda reductive cell-free system (CFS) to specifically study cytosolic metabolism independently of other Warburg-regulatory mechanisms found in the cell. We assessed the impact of lactate and acidification on the Warburg metabolism of cancer cytosols, and whether this effect extended to different cytosolic phenotypes of lactic fermentation and cancer. We observed that moderate acidification, independently of lactate concentration, drastically reduces the glucose consumption rate and halts lactate production in different lactic fermentation phenotypes. In parallel, for Warburg-type CFS lactate supplementation induces pyruvate accumulation at control pH, and can maintain a higher cytosolic pyruvate pool at low pH. Altogether, we demonstrate that intracellular acidification accounts for the direct repression of lactic fermentation by the Warburg-associated lactic acidosis. 3. Good health and well-being |
| نوع الوثيقة: | conference poster not in proceedings http://purl.org/coar/resource_type/c_18coTest conferencePoster |
| اللغة: | English |
| الوصول الحر: | https://orbi.uliege.be/handle/2268/316788Test |
| حقوق: | restricted access http://purl.org/coar/access_right/c_16ecTest info:eu-repo/semantics/restrictedAccess |
| رقم الانضمام: | edsorb.316788 |
| قاعدة البيانات: | ORBi |
| الوصف غير متاح. |