Publications by authors named "P M van Koetsveld"
Immunohistochemistry (IHC) of somatostatin receptor subtype 2 can predict response to first-generation somatostatin receptor ligands (fg-SRLs) in acromegaly. Recently, we validated an open-source digital image analysis (DIA) to quantify somatostatin receptor subtype 2 (SSTR2) expression. We aimed to validate the DIA also on somatostatin receptor subtype 5 (SSTR5) in a new cohort of growth hormone (GH)-secreting pituitary tumors, with IHC performed in a different laboratory, and to correlate fg-SRL response with SSTs expression.
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- - Midgut neuroendocrine tumors (NET) are linked to enterochromaffin cells and have shown a unique fecal microbial signature in patients, indicating an altered gut microbiome compared to healthy controls.
- - A study involving sequencing of fecal samples from 60 NET patients and 20 matched controls revealed specific differences in microbial communities, with 16 species and 18 pathways significantly varying between groups, yet no notable differences in microbial composition were found between patients with and without carcinoid syndrome (CS).
- - The research identifies potential microbial signatures that could serve as biomarkers for diagnosing midgut NET and distinguishing between patients with and without CS, with high accuracy in predicting presence based on microbial pathways and species.
Rationale: When compared to other types of cancer, the prevalence of midgut neuroendocrine tumors (NET) has disproportionally increased over the past decades. To date, there has been very little progress in discovering (epi)genetic drivers and treatment options for these tumors. Recent microbiome research has revealed that enteroendocrine cells communicate with the intestinal microbiome and has provided novel treatment targets for various other cancer types.
View Article and Find Full Text PDFAims: The aim of our study was to determine the effect of histone deacetylase (HDAC) inhibitors (HDACis) on somatostatin type-2 receptor (SSTR2) expression and [In]In-/[Lu]Lu-DOTA-TATE uptake in vitro and in vivo.
Materials And Methods: The human cell lines NCI-H69 (small-cell lung carcinoma) and BON-1 (pancreatic neuroendocrine tumor) were treated with HDACis (i.e.
The differentiation between benign and malignant adrenocortical tumors based on pathological assessment can be difficult. We present a series of 17 patients with unclear malignant tumors, of whom six had recurrent or metastatic disease. The assessment of the methylation pattern of insulin-like growth factor 2 () regulatory regions in fresh frozen material has shown to be valuable in determining the malignancy of adrenocortical tumors, although this has not been elaborately tested in unclear malignant tumors.
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