Searchable abstracts of presentations at key conferences in endocrinology

ea0089b2 | Basic Science | NANETS2022

Multiple Layers of Epigenetic Regulation Cooperate to Silence Expression of Somatostatin Receptor Type 2 in Pancreatic Neuroendocrine Tumors

Madigan James P. , Sharma Rupali , Mondell Ethan , Sadowski Samira M.

Background: Pancreatic neuroendocrine tumors (P-NETs) are a rare cancer with increasing incidences worldwide. Low-grade P-NETs are unique in that they express high levels of Somatostatin Receptor Type 2 (SSTR2), which represents a target for both tumor imaging and therapeutics. P-NET grade inversely correlates with SSTR2 tumor staining, and higher tumor grade is associated with poor patient prognosis. Unfortunately, application of SSTR2-targeted treatment options is currently ...

ea0089b1 | Basic Science | NANETS2022

Single-Cell ATAC and Single-Nucleus RNA Sequencing Uncovers Cellular Heterogeneity Within Pancreatic Neuroendocrine Tumors

Rajhans Shreya , Mondell Ethan , Madigan James , Truongvo Nhi , Wang Li , Kelly Michael , Sadowski Samira M. , Efsun Arda H.

Background: Pancreatic neuroendocrine tumors (PNETs) are a rare, understudied form of cancer with few curative options, and their occurrence is rising. With approximately 4,000 new cases diagnosed per year in the US, and a 5-year relative survival rate of 54%, it’s imperative to understand the molecular mechanisms governing PNET carcinogenesis. To date, most studies used whole-tumor sequencing to characterize PNETs, which hampers the discovery of their microenvironment, c...

ea0098b27 | Basic Science | NANETS2023

Development of GEP-NEN patient derived organoids for therapy screening

Forsythe Steven D. , Madigan James P. , Andrews Stephen , del Rivero Jaydira , Hernandez Jonathan M. , Nilubol Naris , Sadowski Samira M.

Background: Gastroenteropancreatic Neuroendocrine Neoplasms (GEP-NENs) are a rare subset of cancers which nevertheless are a rising health burden. Development of new therapies suffers from several bottlenecks, including low patient accrual and poor understanding of tumor characteristics. Patient tumor organoids (PTOs) are a novel model capable of improving screening of patient tissue in an accurate, standardized, and high-throughput capacity. In this study, we utilized patient...

ea0049gp124 | Endocrine Tumours | ECE2017

VHL Genotype and risk stratification of pancreatic neuroendocrine tumors in patients with von hippel-lindau disease

Tirosh Amit , Shell Jasmine , Green Patience , Keutgen Xavier M. , Sadowski Samira M. , Lakis Mustapha el , Nockel Pavel , Patel Dhaval , Nilubol Naris , Kebebew Electron

Background: About 8–20% of patients with von Hippel-Lindau disease (vHLd) develop pancreatic neuroendocrine tumors (PNETs). However, prognostic markers for these tumors are lacking. The VHL gene mutation type is associated with the clinical phenotype of vHLd. Hence, we aimed to determine whether VHL mutation characteristics may be associated with PNETs phenotype in patients with vHLd.Methods: A prospective study of patients with vHLd and PNETs with ...

ea0049oc7.3 | Cardiovascular endocrinology (1) | ECE2017

High Total 68Ga-DOTATATE-Avid Tumor Volume (TV) is associated with low progression-free survival and high disease-specific mortality rate in patients with neuroendocrine tumors

Tirosh Amit , Papadakis Georgios Z. , Millo Corina , Sadowski Samira M. , Herscovitch Peter , Pacak Karel , Marx Stephen J. , Yang Lily , Nockel Pavel , Shell Jasmine , Green Patience , Keutgen Xavier M. , Patel Dhaval , Nilubol Naris , Kebebew Electron

Background: Patients with neuroendocrine tumors (NETs) have divergent survival, even when having the same site of primary tumor, and tumor stage and grade. 68Gallium (68Ga)-DOTATATE positron emission tomography (PET)/computed tomography (CT) is a sensitive imaging modality for detecting NETs. The purpose of this study was to determine whether 68Ga-DOTATATE PET/CT imaging has any prognostic utility in patients with NETs.Methods: One hundred and eighty-fou...