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Browse 1,466 clinical trials for brain cancer. Find studies that match your criteria and connect with research centers.
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NCT05964569
Low-grade glioma (LGG) represent typically slowly growing primary brain tumors with world health organization (WHO) grade I or II who affect young adults around their fourth decade. Radiological feature on MRI is a predominantly T2 hyperintense signal, LGG show typically no contrast uptake. Radiotherapy plays an important role in the treatment of LGG. However, not least because of the good prognosis with long term survivorship the timing of radiotherapy has been discussed controversially. In order to avoid long term sequelae such as neurocognitive impairment, malignant transformation or secondary neoplasms initiation was often postponed as long as possible
NCT05328089
GBMs are still considered tumors with few available treatment options that are able only to achieve a temporary local control of the disease. In case of a GBM, tumor recurrence is generally expected within 12 months and it is due to the presence of marginal tumoral cells with pro-oncogenic molecular phenotypes that are resistant to actual chemotherapies and to radiation therapy. Nowadays, surgery still represent the first treatment option in case of suspected GBM and it aims to remove the contrast enhancing lesion seen at the pre-operative brain MRI. In particular, the peripheral layer of the tumor is made of low replicating cellsglioblastoma-associated stromal cell (GASC) that can show different carcinogenic properties and that are probably responsible for tumor recurrence. Metabolism of GBMs is mainly anaerobialglicolisis that leads to the transformation of glucose in ATP and lactates. The production of high lactate levels determines a decrease of intracellular pH that is counterbalanced by V-ATPase activity through H+ ions extrusion from the intracellular to the extracellular environment. Increased V-ATPase activity affects different pro-tumoral activities and plays a crucial role in chemoresistance. In fact, a low extracellular pH can reduce the efficacy of antineoplastic agents since a low pH might affect the structural integrity of drugs and their ability to pass through the plasmatic membrane. Finally, V-ATPase can act as an active pump able to excrete antineoplastic agents. GBMs with high V-ATPAse expression are able to transmit malignant features and to activate proliferation of GASC in vitro through a network of microvescicles (MV) like exosomes and large oncosomes (LO) that transport cell to cell copy DNA (cDNA) and micro-RNAs (miRNA).In this view, our work is intended to study: 1) the effects of proton pump inhibitors (PPI) on CSC and GASCs cultures as in vitro add-on treatments; 2) the MVs load (in terms of miRNAs and cDNAs) during the neuro-oncological follow-up in order to understand how it changes after surgery and adjuvant treatments; 3) the possible roles of V-ATPase as a clinical marker to be used to check tumor response to adjuvant treatments.