ACTA ENDOCRINOLOGICA (BUC)

Introduction. Melatonin, the major pineal secretion, regulates sleep/wake cycle and plays an important part in several physiological functions. It is a powerful free\r\nradical scavenger and upregulates several antioxidant enzymes to reduce oxidative stress.\r\nObjective. Mammalian red blood cells contain membrane-bound acetylcholinesterase. Melatonin, being an effective\r\nantioxidant, may cause alteration in erythrocyte acetylcholinesterase activity.\r\nMethods. The study was carried out on 29 healthy donors of both sexes who gave informed consent for the use of their blood samples for the study. The erythrocytes isolated from blood collected at two different timings of the day were subjected to in vitro treatment with melatonin in a concentrationdependent manner followed by the assay of\r\nenzyme activity.\r\nResults. A rhythmic pattern is observed in the activity of acetylcholinesterase, the activity being higher in diurnal samples. Exogenous melatonin modulates the activity of acetylcholinesterase in erythrocytes which is more pronounced at such concentration close to the peak physiological level of melatonin in the body.\r\nConclusion. The increase in the enzyme activity may be explained in relation to the antioxidant potential of melatonin, which is in accordance with the change in photic signals. Further study is required to understand the\r\nmechanism of action.

The subCarpathian areas of Arges county are now characterized by a moderate endemia of iodine deficiency disorders (IDD) due to salt iodization. However, we found some cases of endemic cretinism (EC), that is the major expression of anomalies in the physical and intellectual development caused by a severe iodine deficiency. There are presented 5 patients, 4 men and 1 woman, with neurological endemic cretinism (NEC) (n=2) and mixed forms of the disease (n=3), coming from 2 old endemic areas (medium urinary iodine excretion in the studied patients 20.8 g/day), diagnosed and treated in outpatients clinics or in hospitals. Four patients are members of the same family. The age of the patients is between 36 and 84 years old, the average age being 69. The intellectual capacity was assessed by using the Wechsler and Raven tests, the average intelligence quotient (IQ) value was of 20.8 points ? 1.47. The thyroid volumes (TV) were estimated by palpatory method and by ultrasonography and were between 8.7-200 ml. TSH values in studied patients ranged between 3.8-26 IU/ml and free T4 ranged between 0.272-1.22 ng/dl. Aggregation of more cases of endemic cretinism in the same family suggests the occurrence of some genetic factors. In conclusion, the old age (over 70 years old) of 4 cretins shows they are remnants of the old IDD endemia. However, there is also an isolated case of middle age (36 years old) suggesting an inadequate iodine intake, despite a law regarding salt iodization which has been operating since 1962. More attention to the universal salt iodization and to consumption of iodized salt in the rural areas is necessary.

Objective. To determine the prevalence of overtreatment and hypoglycemia in Turkish type-2 diabetes patients and to identify the risk factors. Methods. Patients ≥ 65 years, having a minimum 5 years of type-2 diabetes, were included in the study. Patients’ body mass index, mean HbA1c level, disease onset and medications related with their co-morbidities were recorded. Over-treatment is defined as the use of non-metformin therapies despite having HbA1c levels < 7%. A history of hypoglycemia episodes in the last three months and patients’ home blood glucose measurements were recorded. Factors relating to hypoglycemia and over-treatment were analyzed. Results. After applying criteria, 755 patients were included in the study: 728 patients (96.4%) had at least one comorbidity. 257 patients (34%) were found to have HbA1c levels < 7%. 217 of them (84.4%) were using non-metformin therapies. 497 patients (65.8%) were using insulin. The overtreatment prevalence in the ≥ 65 years group was 28.7%. The over-treatment ratio in ≥ 80 years group was 28.2%. Hypoglycemia prevalence in the last three months was 23.3%. It was 22.7% for patients ≥ 80 years. Mean age, disease duration, body mass index, insulin usage and doses were found to be significantly different in over-treated patients compared to the others. Conclusions. This study showed that despite recent guidelines, there is still a considerable amount of overtreated geriatric patients who are at risk of hypoglycemia and related morbidity and mortality. Insulinization rate was high. Physicians should not avoid de-intensifying the treatment of geriatric patients who have multiple co-morbidities.

Context. Estimation of intensive care unit (ICU) length of stay time (LOS) may be challenging, and proinflammatory cytokines can be used as a marker for this purpose. Objective. The current study aimed to investigate the association between pro-inflammatory cytokine levels and LOS in hyperglycemic patients admitted to adult ICU. Design. This is a prospective observational study. Subjects and Methods. All adult ICU patients with a blood glucose level higher than 250 mg/dL, during the study period were included. Hospitalization day demographics were recorded, and plasma IL-6, IL1-ß, and TNF-α concentrations were measured. Results. A total of 74 patients were enrolled in the study. Diabetic ketoacidosis (DKA) was positive in 31 patients, and the remaining 43 were in the non-DKA (NDKA) group. There was no difference between the two groups in terms of age, gender, LOS, hemoglobin, hematocrit, lactate levels, and platelets count. IL-6, IL-1ß, and TNF-α levels did not show any difference between DKA and NDKA groups (p=0.784, 0.413, and 0.288, respectively). There was a positive correlation between IL-6 levels and LOS (n=74, Pearson correlation=0.330; p=0.004). Conclusions. Among pro-inflammatory cytokines, IL-6 showed a better performance for the prediction of LOS than IL-1ß, TNF-α, and CRP.

Objectives. The objective of this retrospective study was to evaluate weight gain at 3 months following insulin therapy initiation and to determine if it is due to fat or fat free tissue. Methods. Fifty-eight patients with T2DM and initiation of insulin therapy were evaluated. Body composition was assessed with InBody720 device (Biospace, Korea) before and 3 months after the initiation of insulin therapy. Results. The insulin therapy was initiated with basal insulin in 84.48% of the cases. The initial dose of insulin was 22.76±12.89 units/day and increased at 3 months to 30.81±18.49 units/day (p<0.001). The initial HbA1c was 9.86±2.02% and decreased to 7.58±1.19% (p<0.001). The body weight increased from 87.01±17.37 kg to 88.04±16.64 kg (p=0.026). The fat body mass and the percent of fat decreased with no statistical significance; the intracellular and extracellular body water increased significantly (intracellular: 26.30±5.96 vs. 27.26±6.16; extracellular: 16.61±3.63 vs. 17.03±3.84; p<0.001). Conclusion. During the first 3 months after initiation of insulin therapy a modest weight gain due to increase in the body water after restoration of the metabolic balance was observed.

-

Context. Polycystic ovary syndrome (PCOS) or disease (PCOD) is one of the most common causes of female infertility. Objective. The objective of this study was to find out the influence of insulin on LH, testosterone and SHBG in diffrent PCOS categories. Experimental design. A total of 800 women who were subjected to infertility treatment at infertility clinics were selected. About 60 healthy females with regular menstrual cycles were considered as control. The data were collected from hospital records using subject’s consent. Results. Relationship of insulin to LH and testosterone was positive and significant (p<0.05) in the entire PCOS group and in five PCOS subcategories with increased LH rise (i.e. 1.3, 2, 3, 4 & 5 times of LH rise in relation to FSH levels in each group respectively). The correlation pattern showed an increasing trend from lower to increased rise of LH compared to FSH. The relationship between insulin and SHBG was negative and significant (p<0.05) in all PCOS subcategories, except for the group having similar LH and FSH levels and also in another group with FSH levels higher than LH levels. A strong positive correlation was established between insulin and SHBG in normal subjects. The percentage of negative correlation was strong in PCOD subcategories with elevated rises of LH. Conclusion. This study established the influence of insulin on other marker hormones (LH, testosterone an SHBG) in various PCOS categories in view of their percentage of relationship.

Context. Injury and functional disorders in pituitary gland after COVID-19 still need elucidation. Objective. To investigate pituitary functions, particularly hypothalamic pituitary adrenal (HPA) axis after COVID-19 infection. Methods. This study was conducted at a university hospital between May and October 2021. Patients who had COVID-19, were enrolled as study group, three months after recovery. Participants who do not have COVID-19 diagnosis, with similar characteristics were included as control group. Blood samples were taken on the morning at 08 AM. Adrenal stimulation test was performed with 1 μg of ACTH (Synacthen). Results. The study group included 50 patients and control group was 49 cases. One (2%) out of the 50 patients with 8 a.m. serum cortisol below 5 μg/dL. Low serum ACTH levels were detected in 7 (14%) participants in patient group. Stimulation with 1 μg of ACTH (Synacthen) test was performed for 2 (4%) of 50 patients with serum cortisol below 10 μg/dL. Both patients achieved a peak cortisol of over 12.5 μg/dL after stimulation. Standard deviation (SD) score for insulin like growh factor-1 (IGF-1) was lower than –2 SD for age and gender in 7 (14%) patients. TSH levels was mildly increased in five (10%) patients. There was no significant difference in baseline pituitary hormone levels in study and control groups. Conclusion. Basal pituitary hormone levels and HPA axes were found to be preserved and competently functioning in patients who experienced mild/moderate COVID-19. However, symptoms observed after COVID-19 episode were evident in substantial amount of patients in this study and these symptoms were not associated with changes in pituitary gland function.

Context. The detrimental effects of hyperinsulinemia on human ovaries during follicular development process have been shown in various studies, particularly in women with polycystic ovary syndrome. To our knowledge there is no study regarding the effect of insulin resistance (IR) on the intrauterine insemination (IUI) success in women with unexplained infertility (UEI). Objective. To evaluate the effects of IR on the occurrence of pregnancy among infertile women undergoing ovulation induction (OI) with IUI for UEI. Design. Prospective cohort study. Subjects and Methods. 173 patients who met the criteria for UEI and under the age of 35 were included in this study. All women underwent OI with IUI and, subsequently, they were divided into two groups based on the presence of pregnancy. Data reviewed for analysis were demographic, clinical, and laboratory features. Results. There were 37 (21.4%) cycles with pregnancy and 136 (78.6%) cycles without pregnancy. Median infertility duration was significantly lower in the pregnant group when compared with non-pregnants (p=0.018). The mean number of previous cycles per patient was also lower in this group (p=0.028). No significant differences were found between the groups in terms of other variables. Levels of insulin, fasting glucose and HOMA-IR were also similar between the two groups. Conclusions. IR calculated by using HOMA-IR index has no positive or negative effect on the occurrence of pregnancy in women undergoing OI therapy with IUI for UEI.

Context. Foetal asphyxia, a frequent birth complication, detrimentally impacts the immature brain, resulting in neuronal damage, uncontrolled seizure activity and long-term neurological deficits. Oxytocin, a neurohormone mediating important materno-foetal interactions and parturition, has been previously suggested to modulate the immature brain’s excitability, playing a neuroprotective role. Our aim was to investigate the effects of exogenous oxytocin administration on seizure burden and acute brain injury in a perinatal model of asphyxia in rats. Animals and methods. Asphyxia was modelled by exposing immature rats to a 90-minute episode of low oxygen (9% O2) and high CO2 (20% CO2). Control rats were kept in ambient room-air for the same time interval. In a third group of experiments, oxytocin (0.02 UI/g body weight) was nasally administered 30 minutes before the asphyxia episode. Seizure burden was assessed by the cumulative number of loss of righting reflex (LRR) over a two-hour postexposure period. Acute brain injury was assessed through hippocampal S-100 beta, a biomarker of cellular injury, 24-hours after exposure. Results. Asphyxia increased both LRR and hippocampal S-100 beta protein compared to controls, and these effects were significantly reduced by oxytocin administration. Conclusion. Oxytocin treatment decreased both seizure burden and hippocampal injury, supporting a potential neuroprotective role for oxytocin in perinatal asphyxia.