Endocrine Abstracts

Introduction: Positron emission tomography (PET) using 6-[F-18]fluoro-L-dihydroxyphenylalanine (18F-DOPA) has an excellent sensitivity to detect carcinoid tumor lesions. 18F-DOPA-tumor uptake and the levels of biochemical tumor markers are mediated by tumor endocrine metabolic activity. Therefore we evaluated whether total 18F-DOPA-tumor uptake on PET, defined as the whole-body metabolic burden (WBMTB) reflects tumor load per pat...

Somatostatin (SST), Cortistatin (CORT), ghrelin, and their corresponding receptors (ssts and GHS-R) are closely interrelated systems involved in the regulation of essential hormones for metabolic homeostasis, like insulin, whose release is inhibited by SST/CORT and stimulated by ghrelin. To investigate the underlying mechanisms of this insulin regulation, we analyzed the expression of such systems at pancreatic level in wild type (WT) and CORT knock-out mice (CORT-KO) under bo...

Serum gastrin (G) levels >1000 pg usually raise the suspicion for a neuroendocrine tumor (NET) secreting G. Rarely, such elevated G levels are seen in pts with pernicious anemia (PA) which most commonly is associated with autoimmune gastritis (AG) (1). AG can occur concomitantly with other autoimmune d/o incl. lymphocytic colitis (LC) (2). G stimulates enterochromaffin-like cells which increase histamine (H) secretion. H excess can cause diarrhea (D) as can bacterial overg...

Background: GH replacement during the childhood-adult transition period is important for somatic maturation. The aim of the study was to explore the factors influencing IGF1 response to GH during transition.Methods: KIMS (Pfizer International Metabolic Study) database in UK was interrogated, and 98 patients (55 male, median age 20.7 years (15.7–25.8)) with childhood-onset GH deficiency (Co-GHD), who were started on adult dose of GH during transition...

Background: Delayed puberty and related problems with growth and body image in Crohn’s disease (CD) and ulcerative colitis (UC) have rarely been quantified.Methods: A longitudinal prospective observational study of children with IBD who had anthropometric and puberty data at 0 and 6 months. Of 50 recruited, there were 15 boys (CDM) and 20 girls (CDF) with CD and ten boys (UCM) and five girls (UCF) with UC. The four groups had a median age at 0 month...

Herein, we present the case of a 48yo Caucasian male diagnosed with a well differentiated (WD) pancreatic NET. At primary resection in 2014 pathological staging was pT3N1M0 R0 with Ki67 4%. 5 years later he developed recurrence in local lymph nodes and started on lanreotide followed by IRE on subsequent progression. In 2020, there was strongly DPET-avid metastases in mesenteric nodes and liver, so he was enrolled onto the COMPETE trial1. There was sequential progressive diseas...

Background & objectives: Vibration perception threshold (VPT) is the gold standard for diagnosis of diabetic peripheral neuropathy. The relationship between symptom severity and VPT remains to be determined. This study evaluated the diagnostic utility of symptoms using the NTSS-6 symptom score vis a vis Bio-thesiometry.Methods: diabetic patients with symptoms suggestive of peripheral neuropathy and 40 apparently healthy controls were studied. Detaile...

Recently, several groups have described a subset of obese women, who despite having excessive total body fat, are insulin sensitive (ISO for Insulin Sensitive Obese), normotensive and present a favorable lipid profile. Adiponectin, ghrelin and leptin play important roles in the regulation of energy metabolism and food intake. Moreover, all three hormones have been reported to be closely linked to insulin resistance and regulated by insulin. Therefore, we propose to investigate...

Background: 11β-hydroxysteroid dehydrogenases (11β-HSD1&2) interconvert cortisol (F) and cortisone (E). Although 11β-HSD1 reductase activity has been measured in vivo, E production (dehydrogenase activity) has not been quantified using a Gold Standard technique, steady state tracer infusion.Aim: To develop a method to measure E production in vivo using the stable isotope tracer d2-cortisone (d2E).Me...

Prostate cancer (PC) becomes resistant to chronic castration via an adaptive increase in androgen receptor (AR) axis activity. AR overexpression, however, is a liability that can be exploited therapeutically through rapid cycling between high supraphysiologic and low castrate levels of serum testosterone (T), (Bipolar Androgen Therapy (BAT)). In a pilot study, 14 men with CRPC treated with BAT showed a 50% PSA and objective response. A larger study was initiated in which asymp...