Endocrine Abstracts

ObjectivePolicystic ovary syndrome (PCOS) is a multifactorial disease characterized by reproductive and metabolic impairments. PCOS patients could present anovulation, hirsutism and infertility as well as higher prevalence of metabolic syndrome, glucose intolerance and diabetes. Insulin-resistance (IR) together with hyperandrogenism represent the main players, with reciprocal influences in a vicious circle: insulin promotes androgen secretion in thecal c...

Adult growth hormone deficiency (GHD), a condition characterized by increased oxidative stress (OS), is related to augmented cardiovascular, metabolic and oncological risk. Thymidine-glycol (ThyG) (5, 6-dihydro-5, 6-dihydroxy-2’-deoxythymidine) is a marker of DNA oxidation produced when thymidine is damaged by hydroxyl radicals. It is considered a specific marker since it is not incorporated in RNA; while 8-OH-deoxyguanosine, a well-known marker of oxidative damage, is ra...

Background: Very low-calorie ketogenic diet (VLCKD) was shown to be effective in reducing weight and insulin resistance (IR) in obese patients. Considering that IR is very common in women with polycystic ovary syndrome (PCOS), and that IR worsens hyperandrogenism, ovulatory disfunction, and body fat accumulation, conceivably VLCKD could alleviate PCOS manifestations in the obese phenotype.Objective: This study compared the effects of a commercial VLCKD (...

Non-thyroidal-illness syndrome (NTIS) is present in chronic diseases and considered an adaptive mechanism. However oxidative stress is linked to NTIS in a vicious circle, due to deiodinases alteration and negative effects of low T3 on antioxidant levels or activity. Moreover there is a tissue-specific thyroid hormone transport, receptor binding and hormone metabolism. Muscle is one of the main targets of thyroid hormone; on the other hand, Irisin is a novel discovered myokine ...

In COVID-19 patients the occurrence of low T3 serum values is associated with disease severity and death, but hormonal substitutive replacement is still debated. Clinical trials reported so far failed to demonstrate clear beneficial effects of T3, T4 or both treatments. With the aim to analyze the peripheral effects of the acute deficiency of T3 in blood, we analyzed body fluid composition in 74 COVID-19 patients, admitted to our University Hospital during the last pandemic wa...

Background: The initiation of puberty is heralded by increasing gonadotropin-releasing hormone (GnRH) secretion from the hypothalamus. During embryonic life the GnRH neuroendocrine network develops thanks to a coordinated migration of neurons from the nasal placode to the forebrain. Our group has previously demonstrated that dysregulation in GnRH neuronal migration leads to delayed pubertal onset. Late puberty affects up to 2% of the population and is associated with adverse h...

Introduction: Insulin resistance is a well-known hallmark of the metabolic syndrome (MetS), and it detrimentally affects also protein metabolism, favoring to the decline of lean body mass. The aim of the present study was to explore muscle strength (as a functional consequence of sarcopenic obesity) and muscle quality (namely, myosteatosis) in women with and without the Metabolic Syndrome (MetS).Methods: Study participants were enrolled at the Sapienza U...

: Non-thyroidal-illness syndrome (NTIS) is present in chronic renal failure and considered an adaptive mechanism. However oxidative stress is linked to NTIS in a vicious circle, due to deiodinases alteration and negative effect on antioxidant levels or activity. One key antioxidant, protective toward ROS-mediated tissue damage, is extracellular superoxide-dismutase (ec-SOD), present in extracellular matrix and with a role in mediating nitric oxide-induced signaling. ec-SOD is ...

It is well known that insulin resistance (IR) is associated with polycystic ovary syndrome (PCOS). Oxidative stress (OS) is, in turn, related to IR, with a vicious cycle. PCOS patients presented higher circulating concentrations of oxidative stress products such as homocysteine, malondialdehyde, an increase of superoxide dismutase and reduction of antioxidants such as glutathione and paraoxonase-1 activity. Most studies however concerned obese PCOS subjects. The physiopatholog...

It is well known that heart failure is associated with oxidative stress (OS). Reactive oxygen species in fact influence sarcolemmal and mitochondrial ione channels, which are responsible for cardiomyocyte excitability and are important in myocardial remodeling after a myocardial infarction. The decrease of anabolic axes can have a role in the progression of the illness.In order to evaluate the relationship between growth hormone deficiency (GHD) and inde...