177Lu-DOTATATE Plus 166Ho-Radioembolization in Patients with Neuroendocrine Tumours; A Single Center, Prospective, Interventional, Non-Comparative, Open Label, Phase II Study (HEPAR PLuS Study) Abstract #2731

Introduction: The liver is the most commonly affected organ in metastatic neuroendocrine disease and is the most incriminating factor for patient survival. Additional treatment of liver disease with radioembolization may improve outcome in NET patients with bulky residual liver disease after PRRT.
Aim(s): A phase 2 study (HEPAR PLuS) was initiated to assess effectiveness and toxicity of holmium-166 radioembolization (166Ho-RE) after PRRT with lutetium-177-DOTATATE.
Materials and methods: The HEPAR PLuS study included 30 patients with histologically confirmed grade 1 or 2 NET and >3 measurable residual liver metastases according to RECIST 1.1 received 166Ho-RE within 20 weeks after the 4th and last cycle of PRRT. Primary objectives: objective response rate (ORR = complete plus partial response) after 3 and 6 months according to RECIST 1.1 in the liver. Secondary endpoints included patient-based ORR, toxicity profile according to CTCAE v4.03 and quality of life assessments according to EORTC QLQ-C30 and GI.NET21 questionnaires.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Nuclear Medicine - Imaging and Therapy (PRRT)
Presenting Author: M.D. Ph.D. Arthur Braat

To read results and conclusion, please login ...

Further abstracts you may be interested in

#20 Paraneoplastic antigen Ma2 (PNMA2) auto-antibodies as biomarkers for early small intestine neuroendocrine tumors detection
Introduction: Small intestine neuroendocrine tumors (NETs) comprise well-differentiated NET (benign carcinoid), well-differentiated neuroendocrine carcinoma (malignant carcinoid) and poorly differentiated neuroendocrine carcinoma (NEC). The majority of NET patients have developed liver metastases at the time of diagnosis and surgery is then seldom curative. Novel predictive, diagnostic and prognostic markers are thus needed to improve our capabilities to diagnose and cure these tumors. We have previously identified six novel marker genes for neuroendocrine tumor cells by using Affymetrix microarrays and advanced bioinformatics. One of this markers, the paraneoplastic antigen Ma2 (PNMA2), which is normally expressed only in nervous tissue, can in the process of carcinogenesis be detected in tumors located outside the nervous system. The finding that Ma2 is expressed in small intestine neuroendocrine primary tumors and their metastases made it interesting to screen whether antibodies against Ma2 are present in the serum of NET patients.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: PhD Valeria Giandomenico
Authors: Cui T, Elgue G, Li S C, Hurtig M, ...
#38 Expression of mTOR signaling pathway and effects of mTOR inhibitors on its pathway in human neuroendocrine tumors
Introduction: Neuroendocrine tumors (NET), especially well-differentiated endocrine tumors, are often slow-growing, indolent, and may not become clinically apparent until the manifestations of metastatic spread or carcinoid syndrome. Results of previous studies demonstrated that phosphoinositide 3-kinase (PI3K)/Akt/mTOR signaling pathway may be activated in the great majority of NET cells. mTOR inhibitors are therefore considered effective anti-tumor reagents but they may also induce an activation of PI3K/Akt and MAPK pathways as a compensatory action and reduce their own anti-tumor activities.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: Professor Hironobu Sasano
Authors: Iida S, Miki Y, Ono K, Sasano H, ...
#51 Epidemiology of the neuroendocrine tumors diagnosed in Cardarelli Hospital: a retrospective single-institution analysis of 274 cases
Introduction: Neuroendocrine tumors (NETs) are considered rare tumors and are characterized by their ability to produce peptides that cause typical hormonal syndromes. Neuroendocrine tumors consist of a wide spectrum of malignancies with different histology that can arise from distributed neuroendocrine cells in the body. Although these tumors are frequently indolent, they can be aggressive and resistant to therapy. Its incidence in the U.S.A has been rising in the last three decades (Surveillance, Epidemiology, and End Results registry). NETs are more common than generally believed.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Ferdinando Riccardi
#62 Genome-wide DNA methylation profiling of pancreatic neuroendocrine tumors identifies distinct methylation profiles and differentially methylated gene promoter regions associated with low, medium and high grade tumors
Introduction: Integration of genetics and epigenetics has emerged as a powerful approach to studying cellular differentiation (Mikkelsen et al, 2009) and tumorigenesis (Shen et al, 2007). The study of DNA methylation is of particular importance in cancer, as causal involvement has been demonstrated and it is the most stable of all epigenetic modifications, making it a desirable marker for both early detection and treatment of tumors. Hypermethylation of CpG sites in gene promoter regions leads to decreased gene expression; if such a gene is a tumor suppressor, this leads to carcinogenesis. To date, there have been no studies of genome-wide DNA methylation profiling of NETs. This study sets out to determine the DNA methylation profiles of low, intermediate and high grade pancreatic NET liver metastases with the intention of identifying dysregulated biological pathways in the development of these tumors. A protocol for the analysis formalin-fixed paraffin embedded tissue (FFPE) has also been developed in order to study these tumors in significant numbers following this pilot study.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: Dr Christina Thirlwell
#68 Serum chromogranin A as tumor marker in neuroendocrine tumors
Introduction: Serum chromogranin A (CgA) is used as a tumor marker for neuroendocrine tumors (NETs).
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr. Svenja Nölting