Abstract library

955 results for "healthy tissue and target lesion dosimetry".
#2863 Introduction of Dosimetry on PRRT Practice. A Useful Tool to Detect Responders and Evaluate Treatment Safety
Introduction: PRRT is a recognized salvage option for G1-G2 GEPNET. Currently, the Italian protocol (Lutathera AIFA Guidelines) consists in four fixed-dose of 177 Lu-DOTATATE. The dosimetry has recently been recognized as an important tool to guide PRRT but is not yet part of routine practice.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Case reports
Presenting Author: MD Federica Scalorbi
#2984 AGTR1 Is Overexpressed in Neuroendocrine Neoplasms, Regulates Secretion and May Serve as a Target for Molecular Imaging and Therapy
Introduction: Peptide receptor targeting has proven to be a pivotal tool for diagnostic imaging and radioligand therapy of neuroendocrine neoplasms (NENs), which frequently express somatostatin receptors (SSTRs) on their cell surface. However, up to 30 % of NEN patients do not benefit from SSTR-based approaches, others develop a resistance.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Basic Science - Signaling pathways, receptors, biomarkers
Presenting Author: Dr. Carsten Grötzinger
Authors: Grötzinger C, Exner S, Schuldt C, Du J, ...
#2917 Quantification of Intratherapeutic SPECT/CT for Lutetium-177-DOTATOC PRRT in Neuroendocrine Tumors
Introduction: In PRRT for NET, feasibility of lesion uptake quantification in Lu-177-DOTATOC SPECT/CT for therapy monitoring remains unclear.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Trials in Progress/Trials in Concept
Presenting Author: Markus Galler
Authors: Galler M, Schatka I, Buch F, Bluemel S, ...
#2998 Inter- and Intrapatient Mean Absorbed Dose Variation and Simplification of Dosimetric Workflow after PRRT
Introduction: Post-PRRT dosimetry is not routinely performed, partly due to required multiple imaging time points. One time point imaging would reduce patient burden, and make dosimetry more applicable in the clinical settings.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Nuclear Medicine - Imaging and Therapy (PRRT)
Presenting Author: Daphne Huizing
#2996 A Head-to-Head Comparison between Two Software Packages for Hybrid Dosimetry after PRRT
Introduction: The number of dosimetry studies after PRRT is increasing, yet different methodologies are used which challenge comparison or pooling of results.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Nuclear Medicine - Imaging and Therapy (PRRT)
Presenting Author: Daphne Huizing
#453 Activation of Hedgehog Pathway in Neuroendocrine Tumor
Introduction: Neuroendocrine tumors (NETs) are rare tumors and often follow an indolent course, especially the tumors of low-to-intermediate grade. The genetic etiology of sporadic NET is largely unknown. It is well-known that a significant number of patients with NETs may have harbored the slow-growing lesions since very a young age, suggesting it could result from alterations of pathways involved in development. Hedgehog (Hh) signaling has been found to be important in embryonic patterning, stem cell maintenance and tissue repair; and is normally silenced in most mature adult tissue. However, it frequently undergoes gain-of-function mutations or reactivation due to ligand overproduction and has been linked to the etiology of a variety of tumors.
Conference: 9th Annual ENETS Conference (2012)
Category: Basic
Presenting Author: MD Mei Dong
#1425 Dosimetry to Estimate the Effect of Gelofusine® on the Renal Absorbed Dose of Lutetium 177-DOTA-octreotate.
Introduction: Lutetium-177 DOTA-octreotate (LuTate), a radiolabelled somatostatin analogue, delivers targeted radiation to neuroendocrine tumours and metastases. Healthy tissues also receive significant irradiation. Charged amino acids are routinely co-infused to block renal proximal tubular LuTate reabsorption. Gelofusine® (a succinylated bovine gelatin molecule), proposed to interact with the megalin/cubulin receptor-mediated transporter system, has been shown to reduce renal uptake of indium-111 octreotide. Routine Gelofusine® administration is limited by risk of allergic reaction.
Conference: 13th Annual ENETS conference 2016 (2016)
Category: Medical treatment - SMS analogues, interferon
Presenting Author: Dr Catherine Lucas
Authors: Lucas C, Goodman S, Smith J, Burge M, ...
#2275 Analysis of Gene Expression Patterns of Rectum Neuroendocrine Tumors (NET) Versus Healthy Tissue Reveals Alterations in the MAPK and WNT Signaling Pathways
Introduction: The neuroendocrine tumors (NETs) of the rectum are rare but increasing in incidence, by means of improved endoscopic techniques and histological reporting. They often occur as small polypoid lesions and G1, and in most cases an incidental finding at endoscopy.
Conference: 15th Annual ENETS conference 2018 (2018)
Category: Basic Science - Signaling pathways, receptors, biomarkers
Presenting Author: Dr. Franziska Briest
#2289 Tumor Necrosis Factor-Related Apoptosis-Inducing Ligand (TRAIL) Receptor Expression in Patients with Neuroendocrine Neoplasia
Introduction: Targeting the death receptor pathway of apoptosis represents a promising approach for the development of novel cancer therapeutics. TNF-related TRAIL induces apoptosis upon binding to TRAIL receptors 1 and 2 (TRAIL-R1/DR4 and TRAIL-R2/DR5). TRAIL-R3 (DcR1) and TRAIL-R4 (DcR2) have been reported to block TRAIL-mediated apoptosis upon overexpression. Specially agonists for the apoptosis-inducing TRAIL-R1 and TRAIL-R2 are currently tested in clinical trials.
Conference: 15th Annual ENETS conference 2018 (2018)
Category: Basic Science - Signaling pathways, receptors, biomarkers
Presenting Author: Dr René Pschowski
Authors: Sättele R, Jann H, Fischer C, Pape U F, ...
Keywords: TRAIL, apoptosis, NENs
#2947 Al18F-NOTA-Octreotide PET Imaging of the Somatostatin Receptor: First Comparison with 68Ga-DOTATATE in Neuroendocrine Tumor Patients
Introduction: Practical and economic challenges limit the widespread use of 68Ga-labeled somatostatin analog (SSA) PET, the current standard for somatostatin receptor imaging. A promising 18F-labeled SSA, Al18F-NOTA-octreotide (Al18F-OC), has recently been introduced.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Nuclear Medicine - Imaging and Therapy (PRRT)
Presenting Author: Elin Pauwels