Endocrine Abstracts

IntroductionLeukocyte recruitment is a key feature in (I/R)-induced tissue injury. We have developed and validated a novel method to study molecular mechanisms of leukocyte-endothelium interactions in the colonic microcirculation in vivo by use of inverted intravital fluorescence microscopy.Methods & ResultsIn male C57/BL6 mice the superior mesenteric artery was occluded 30 min and leukocyte rolling and ...

The TSH B/I ratio is normally reduced overnight and is substantially reduced in patients with overt central hypothyroidism due to h-p axis tumours before and after treatment. It is unknown if similar changes in the TSH B/I ratio in the absence of overt central hypothyroidism contribute to the increased TSH levels seen in cancer survivors who undergo h-p axis irradiation. Thus, we selected 9 patients with the highest TSH levels out of a previously reported cohort of 37 euthyroi...

Introduction: The clinical implications of QTc and P wave dispersion in patients with Cushing’s syndrome have not been studied previously. In this study, we aimed to compare QTc dispersion and P wave dispersion in patients with Cushing’s syndrome and healthy subjects.Material and method: Sixteen patients with Cushing’s syndrome diagnosed on clinical, laboratory and imaging findings and 16 age and sex matched control subjects were included....

Selenium (Se) is an essential trace element and is important for maintaining health and preventing disease. Se exhibits its biological function as the 21st proteinogenic amino acid selenocysteine (Sec). Different cis and trans acting factors are necessary for incorporation of Sec into proteins. Se can be transported and stored as Sec in selenoprotein P (SePP), a liver-derived protein which contains up to 10 Sec residues per protein in humans. Thus, SePP functions...

Introduction: The serum calcium/phosphorus (Ca/P) ratio has been proposed to identify patients with primary hyperparathyroidism and chronic hypoparathyroidism (HPT) from healthy subjects. However, other disorders of the Ca-P metabolism might present similar biochemical profile of HPT, such as pseudohypoparathyroidism (PHP), for which the use of Ca/P can be useful. Aim: To test the performance of Ca/P ratio in the diagnosis of PHP in comparison to healthy...

Introduction: Primary hyperparathyroidism (PHPT) is a common endocrine disorder that is characterized by hypercalcemia and elevated or normal levels of parathyroid hormone (PTH). Most PHPT cases are incidentally discovered when routine laboratory analysis reveals hypercalcemia. PHPT should be considered in any person with elevated serum calcium (Ca) levels and no clear evidence of malignancy. Serum phosphorus (P) is low due to the phosphaturic effects of PTH and mostly in the ...

Background: Primary hyperparathyroidism (PHPT) is the third most common endocrine disorder. The Ca/P ratio is an accurate tool to differentiate patients with PHPT (>3.5 if Ca and P are expressed in mg/dl) from healthy subjects [1]. The reliability of this index is based on the fact that serum Ca and P are inversely related together. However, other disorders of the Ca-P metabolism, such as hypophosphoremia (HypoP), might impair the Ca/P ratio.Aim: To ...

CATSPER is a family of sperm-specific calcium channels activated by P in human spermatozoa (Lishko et al. 2011, Strunker et al. 2011). KO mice for CATSPER are infertile due to severe defects in sperm motility.We studied the involvement of CATSPER in human sperm motility and P responsiveness.Western blot analysis with an anti-CATSPER1 antibody demonstrated the presence of three major bands corresponding to CATSPER1...

Background: A 73-year-old female presented to the hospital with a 3-day history of right upper quadrant abdominal pain and episodes of vomiting. Her past medical history included insulin treated Type 2 diabetes diabetes, deep venous thrombosis for which she was on rivaroxaban, COPD, right leg angioplasty and previous p-ANCA vasculitis. She also had flank tenderness and was noted to be hypertensive with a blood pressure of 225/93mmHg. A CT scan of the abdomen identified a new 4...

Case History: X-linked hypophosphataemia (XLH) manifests as rickets in infancy or childhood, and is caused by mutations of the phosphate-regulating neutral endopeptidase (PHEX) gene, which leads to excess production of the fibroblast growth factor-23 (FGF-23) hormone. We present a case illustrating that mutation of PHEX can also cause hypophosphataemia presenting in adulthood. The proband is a 56-year-old male, who was referred with persistent hypophosphataem...