Abstract Library

#4632 MEN1 associated pancreatic neuroendocrine tumours: Re-evaluating the 2cm cut-off for surgical resection

Introduction: Pancreatic neuroendocrine tumours (PanNETs) are the leading cause of death in patients (pts) with MEN1. Screening is recommended to diagnose early and prevent metastases. The optimal cut-off of when to intervene in a PanNET is still an area of debate.

Conference:

Presenting Author: Frydman A

Authors: Frydman A, Clement D, Srirajaskanthan R,

Keywords: MEN1, Pan NET,

#4519 ANXA1-labelled cancer-associated fibroblasts induces tumour invasion and immunosuppressive microenvironment

Introduction: The growth pattern of a tumour is a marker for distinguishing inert from invasive tumours. In general, tumours such as the encapsulated follicular variant of papillary thyroid carcinoma show expansive growth. In contrast, invasive tumours, such as colorectal cancer and squamous cell carcinoma of the tongue, show invasive growth with infiltration into surrounding structures and have a poorer prognosis. Pancreatic neuroendocrine neoplasm (PNEN) is the heterogeneous tumour originating from peptidergic neurons and neuroendocrine cells. PNEN with a high proportion of tumour mesenchyme, especially those presenting an infiltrating stroma, have a poor prognosis. In the infiltrating mesenchyme, cancer-associated fibroblasts (CAF) play an important role. However, little research has been done on the mechanisms of how infiltrating CAF affects tumour malignancy and immune microenvironment.

Conference:

Presenting Author: Wang Y

Authors: Wang Y, Xu J, Chen J, Xu X, Ji S,

Keywords: pancreatic neuroendocrine neoplasm, tumour-associated fibroblasts, immunosuppressive microenvironment,

#4396 Hypoxic microenvironment in neuroendocrine tumours

Introduction: The hypoxic microenvironment is a hallmark of many solid tumours, including neuroendocrine tumours (NETs). Hypoxia plays a crucial role in tumour progression, metastasis, and therapy resistance. However, the specific mechanisms by which hypoxia influences NET behaviour remain poorly understood.

Conference:

Presenting Author:

Authors: Xu L, Yu P, Ye M, Chen J, Tang Q,

Keywords: Neuroendocrine tumour, hypoxia, HIF-1α, VEGF, mTOR, PI3K/AKT, drug resistance, EMT,

#4381 TOPK promotes tumorigenesis and metastasis of pancreatic neuroendocrine neoplasms by enhancing the MAPK signalling pathway

Introduction: T-LAK cell-originated protein kinase (TOPK) is highly expressed in pancreatic neuroendocrine neoplasms (pNENs) with liver metastasis and is associated with a poor prognosis.

Conference:

Presenting Author: Chen Q

Authors: Chen Q, Yuan M, Meng M, Ren S, Li G,

Keywords: TOPK, Pancreatic Neuroendocrine Neoplasm, MAPK signalling pathway, Invasion and metastasis, HI-TOPK-032,

#4373 Focal adhesion kinase drives proliferation and invasion in gastrointestinal neuroendocrine tumours via modulation of transformative cell signalling and gene expression

Introduction: Focal Adhesion Kinase (FAK) is a non-receptor protein kinase that localises in both the cytoplasm and nucleus, influencing cell function through its enzymatic and scaffold activities. Through its scaffold function, FAK modulates gene expression epigenetically. Gastrointestinal neuroendocrine tumours (GI-NETs) exhibit a relatively low mutation rate, supporting the hypothesis that these malignancies may be driven epigenetically. Recently, PROTAC (PROteolysis TArgeting Chimeras) technology has enabled selective inhibition and degradation of FAK, providing a novel approach to explore its role in GI-NETs.

Conference:

Presenting Author: Gagliano T

Authors: Toffoli L, Ditsiou A, Moschioni E, Hamm V, Gagliano T,

Keywords: FAK, GI-NET, Cell Signalling, Epigenetics,