Unveiling AMBRA1 as a prognostic biomarker in in vivo pre-clinical models of cutaneous melanoma

Grantee: Daniela De Zio, Danish Cancer Society Research Center, Copenhagen, Denmark

Grant: 2,900,000 DKK

The survival rate of patients with advanced melanoma has improved in recent years due to the clinical application of immune checkpoint inhibitors, as well as kinase inhibitors in BRAF/RAS-mutated melanoma cases.

However, melanoma remains a fatal diagnosis as a consequence of emerging resistance mechanisms and the absence of reliable biomarkers that identify high-risk tumour subsets, therefore impacting the stratification of these subsets for novel adjuvant therapies.

In the search for novel oncosuppressors that are altered in melanoma, we have found a promising candidate in the protein called AMBRA1. AMBRA1 has a fundamental role in the positive regulation of autophagy – a process which can elicit both pro- and anti-tumorigenic roles. Additionally, AMBRA1 finely modulates other crucial oncogenic processes, such as cell proliferation, cell invasion, and cell death.

Our preliminary research in a mouse model of melanoma has proven Ambra1 to be a crucial oncosuppressor, whose expression has been found highly altered in a number of human melanoma cells. Thus, by applying melanoma cell and mouse models in combination with systems biology approaches and state-of-the-art technologies, we aim to decipher the response of Ambra1-deficient melanomas to the current therapies.

Moreover, we will investigate the role of Ambra1 in regulating lipid metabolism in melanoma, which has recently been shown to profoundly affect its progression. Additionally, our aim is to assess the prognostic relevance of AMBRA1 in human cohorts of melanoma patients and understand whether AMBRA1 expression correlates with disease progression and whether it influences treatment.

Outcomes from this project will pave the way for novel clinical insight into the prognosis and treatment of melanoma patients.

This project is co-supported by a Young Investigator award from the Melanoma Research Alliance (MRA) in the USA of 224,500 USD (https://www.curemelanoma.org/research/grants/).