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Clinical Neuroscience

NOVEMBER 30, 2020

Positive airway pressure normalizes glucose metabolism in obstructive sleep apnea independent of diabetes and obesity

KABELOĞLU Vasfiye, SENEL Benbir Gulçin, KARADENIZ Derya

The relationship among obstructive sleep apnea syndrome (OSAS), type 2 diabetes mellitus (DM2) and obesity is very complex and multi-directional. Obesity and increased visceral fat are important perpetuating factors for DM2 in patients with OSAS. On the other hand, OSAS itself leads to obesity by causing both leptin and insulin resistance as a consequence of activation of the sympathetic nervous system. Risk for developing DM2 further increases in patients with OSAS and obesity. Data regarding effects of positive airway pressure (PAP) therapy, gold standard treatment for OSAS, on glycemic control were inconsistent due to variability in duration of and adherence to PAP therapy. In our cohort study we investigated effects of PAP treatment on glucose metabolism in normal-weighted non-diabetic OSAS patients, in obese non-diabetic OSAS patients, and in OSAS patients with DM2. We prospectively analyzed 67 patients diagnosed with OSAS and documented to be effectively treated with PAP therapy for three months. Apnea-hypopnea index was highest in the diabetic group, being significantly higher than in the normal-weighted group (p=0.021). Mean HOMA values were significantly higher in obese (p=0.002) and diabetic group (p=0.001) than normal-weighted group; the differences were still significant after PAP therapy. HbA1c levels were significantly higher in diabetic group compared to those in normal-weighted (p=0.012) and obese (p=0.001) groups. After PAP treatment, decrease in HbA1c levels were significant in normal-weighted (p=0.008), obese (p=0.034), and diabetic (p=0.011) groups. There was no correlation with the change in HbA1c levels and age (p=0.212), BMI (p=0.322), AHI (p=0.098) or oxygen levels (p=0.122). Our study showed that treatment of OSAS by PAP therapy offers beneficial effect on glucose metabolism, not only in diabetic patients, but also in obese and normal-weighted OSAS patients. Although data regarding overall effects of PAP therapy on glycemic control present contradictory results in the literature, it should be emphasized that duration and adherence to PAP therapy were main determinants for beneficial outcome of treatment.

Hypertension and nephrology

NOVEMBER 04, 2020

[The ACE2-Ang(1-7)-Mas axis as a new option for lowering blood pressure]

KÉKES Ede

[The ACE2-Ang(1-7)-Mas axis counterbalances the ACE/Ang II-AT1R axis in our body in order to maintain normal homeostasis. During the Covid-19 pandemic, this protective system came to the fore again and its beneficial effects on the cardiovascular-metabolic system, including the significant antihypertensive effect, are being clarified. In our brief summary, we analyze the essential aspects of this research.]

Hypertension and nephrology

NOVEMBER 04, 2020

[Covid-19 and the diabetes mellitus]

SIMONYI Gábor

[In late 2019 the epidemic of new coronavirus disease (Covid-19) from Wuhan, China, posed major challenges to the health systems of even the most developed countries. High mortality of the disease has been observed mainly in the elderly and in those with various cardiovascular and metabolic comorbidities. In this summary, the relationship between diabetes mellitus]

Hypertension and nephrology

SEPTEMBER 30, 2020

[Post-career development of cardiometabolic changes and hypertension in competitive athletes]

LELBACH Ádám, KÁNTOR Márk, KOLLER Ákos

[Regular physical activity is essential in delaying the aging processes (e.g. arterial remodelling – stiffening, metabolism, bodyweight), the beneficial effects of competitive sports – especially strength sports – according to the recent data of the literature are questionable. The beneficial effects of physical activity on the cardiovascular (CV) system are well known, however less is known regarding the delayed impacts of high intensity competitive sports on the CV system, especially after the sport career is over. This review summarizes the effects of active competitive sport and the post-career period on the cardiometabolic system with special attention to the systemic blood pressure and the development of metabolic syndrome. After sport career, the welldeveloped high performance cardiovascular- and metabolic system suddenly is much less used, but still supported by sport-level diet. It is well known that hypertension is a significant pathogenic factor in the development of cardiovascular diseases, characterized – among others – by reduced elasticity of large- and medium- sized vessels thereby importantly contributing to the development of systolic hypertension. Inflammation and thrombus formation both play an important role in the development of vascular injury and atherosclerosis. The increased tone of microvessels can impair the blood supply of certain organs, including the coronary circulation. It has been ample shown, that regular non-competitive, aerobic exercise activities are important factors in preventing hypertension. Such pathological changes become more evident after the development of post-career obesity, as well as the development of hypertension due to the activation of the renin-angiotensin system through sodium retention and other metabolic changes (increased glucose tolerance, insulin resistance, type II diabetes mellitus). It has been ample shown, that regular non-competitive, dynamic aerobic exercise activities are important factors in preventing hypertension. The frequency, intensity, type, and time (FITT) principle of exercise prescription is the first and common therapeutic approach, which represents the translation of cardiovascular basic science research results into hypertension treatment, thus can provide a personalized physical activity program/therapy according to medical needs not just for the post-career sportspersons, but the wide range of patients.]

Clinical Neuroscience

SEPTEMBER 30, 2020

A rare entity of acquired idiopathic generalised anhidrosis which has been successfully treated with pulse steroid therapy: Does the histopathology predict the treatment response?

ÖKTEM Özdemir Ece, ÇANKAYA Şeyda, UYKUR Burak Abdullah, ERDEN Simsek Nazan, YULUG Burak

Acquired idiopathic generalised anhidrosis is an uncommon sweating disorder characterized by loss of sweating in the absence of any neurologic, metabolic or sweat gland abnormalities. Although some possible immunological and structural mechanisms have been proposed for this rare entity, the definitive pathophysiology is still un­clear. Despite some successfully treated cases with systemic corticosteroid application, the dose and route of steroid application are controversial. Here, we present a 41-year-old man with lack of genera­lised sweating who has been successfully treated with high dose pulse intravenous prednisolone. We have discussed his clinical and histopathological findings as well as the treatment options in view of the current literature.

Clinical Neuroscience

SEPTEMBER 30, 2020

Late simultaneous carcinomatous meningitis, temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting with mono-symptomatic vertigo – a clinico-pathological case reporT

JARABIN András János, KLIVÉNYI Péter, TISZLAVICZ László, MOLNÁR Anna Fiona, GION Katalin, FÖLDESI Imre, KISS Geza Jozsef, ROVÓ László, BELLA Zsolt

Although vertigo is one of the most common complaints, intracranial malignant tumors rarely cause sudden asymmetry between the tone of the vestibular peripheries masquerading as a peripheral-like disorder. Here we report a case of simultaneous temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting as acute unilateral vestibular syndrome, due to the reawakening of a primary gastric signet ring cell carcinoma. Purpose – Our objective was to identify those pathophysiological steps that may explain the complex process of tumor reawakening, dissemination. The possible causes of vestibular asymmetry were also traced. A 56-year-old male patient’s interdisciplinary medical data had been retrospectively analyzed. Original clinical and pathological results have been collected and thoroughly reevaluated, then new histological staining and immunohistochemistry methods have been added to the diagnostic pool. During the autopsy the cerebrum and cerebellum was edematous. The apex of the left petrous bone was infiltrated and destructed by a tumor mass of 2x2 cm in size. Histological reexamination of the original gastric resection specimen slides revealed focal submucosal tumorous infiltration with a vascular invasion. By immunohistochemistry mainly single infiltrating tumor cells were observed with Cytokeratin 7 and Vimentin positivity and partial loss of E-cadherin staining. The subsequent histological examination of necropsy tissue specimens confirmed the disseminated, multi-organ microscopic tumorous invasion. Discussion – It has been recently reported that the expression of Vimentin and the loss of E-cadherin is significantly associated with advanced stage, lymph node metastasis, vascular and neural invasion and undifferentiated type with p<0.05 significance. As our patient was middle aged and had no immune-deficiency, the promoting factor of the reawakening of the primary GC malignant disease after a 9-year-long period of dormancy remained undiscovered. The organ-specific tropism explained by the “seed and soil” theory was unexpected, due to rare occurrence of gastric cancer to metastasize in the meninges given that only a minority of these cells would be capable of crossing the blood brain barrier. Patients with past malignancies and new onset of neurological symptoms should alert the physician to central nervous system involvement, and the appropriate, targeted diagnostic and therapeutic work-up should be established immediately. Targeted staining with specific antibodies is recommended. Recent studies on cell lines indicate that metformin strongly inhibits epithelial-mesenchymal transition of gastric cancer cells. Therefore, further studies need to be performed on cases positive for epithelial-mesenchymal transition.

Lege Artis Medicinae

JULY 01, 2020

[Sarcopenia – muscle loss – pathomechanism, clinical presentation and metabolic comorbidities]

VERECKEI Edit, HODINKA László

[Sarcopenia, or the age-related involution of muscle strength and muscle mass, is a serious public health concern, due to the growing number of elderly population caused by nowadays demographic changes i.e. prolonged life expectancy. By ageing, the muscle tissue is shrinking gradually, leading to the loss of muscle strength and masses. This condition is called sarcopenia. Sar­co­penia is the simultaneous decrease of muscle mass, muscle strength and functional independence. In parallel the physical performance deteriorates (weakness, slowness and poor physical balancing). Fatigue, el­derly behaviour and weight loss are the consequences of these accumulating deficits, which associate with cognitive decline and result in increasing social isolation. The primary form of sarcopenia is the decrease of the energy production of muscle cells and then the death of muscle cells. Se­con­dary, endocrine dysfunctions, diseases of the nervous system, decreased physical activity, malnutrition or malabsorption, chronic infection accelerate the process and aggravate the patient’s condition. Complex genetic, biochemical and endocrine mechanisms take part in the development of sarcopenia. This involution is due to the impaired balance of restoring and depleting processes of muscles. A questionnaire and algorithm have been developed to recognize, screen and diagnose the risks of sarcopenic condition; these separate the sarcopenic and non-sarcopenic patients with specific cut-off values. Sar­co­penia can be diagnosed based on walking speed, decreased handgrip strength and measured or calculated muscle mass in persons over 65. Sarcopenia can be considered as a phenomenon of “physiological” aging, however, it becomes a disease when diagnostic cut-offs are exceeded and the patient experiences functional disability and declining quality of life. Prevention and treatment of sarcopenia and reducing the risk of falling are based on regular active resistance and coordination exercises. Options for pharmaceutical treatments are limited since despite of identified molecular targets there are no convincingly effective innovative therapy on the horizon. Nevertheless, there are some weak evidence for efficacy of the application of amino acids stimulating muscle cell differentiation, such as leucine or the analogue of beta-hydoxy-methylbutyrate beside exercise therapy.]

Clinical Neuroscience

MAY 30, 2020

Autonomic nervous system may be affected after carpal tunnel syndrome surgery: A possible mechanism for persistence of symptoms after surgery

ONDER Burcu, KELES Yavuz Betul

After carpal tunnel surgery, some patients report complaints such as edema, pain, and numbness. Purpose – The aim of this study was to evaluate autonomic nervous system function in patients with a history of carpal tunnel surgery using sympathetic skin response (SSR). Thirty three patients (55 ±10 years old) with a history of unilateral operation for carpal tunnel syndrome were included in the study. The SSR test was performed for both hands. Both upper extremities median and ulnar nerve conduction results were recorded. A reduced amplitude (p=0.006) and delayed latency (p<0.0001) were detected in the SSR test on the operated side compared to contralateral side. There was no correlation between SSR and carpal tunnel syndrome severity. Although complex regional pain syndrome does not develop in patients after carpal tunnel surgery, some of the complaints may be caused by effects on the autonomic nervous system.

Clinical Neuroscience

MAY 30, 2020

The etiology and age-related properties of patients with delirium in coronary intensive care unit and its effects on inhospital and follow up prognosis

ALTAY Servet, GÜRDOGAN Muhammet, KAYA Caglar, KARDAS Fatih, ZEYBEY Utku, CAKIR Burcu, EBIK Mustafa, DEMIR Melik

Delirium is a syndrome frequently encountered in intensive care and associated with a poor prognosis. Intensive care delirium is mostly based on general and palliative intensive care data in the literature. In this study, we aimed to investigate the incidence of delirium in coronary intensive care unit (CICU), related factors, its relationship with inhospital and follow up prognosis, incidence of age-related delirium and its effect on outcomes. This study was conducted with patients hospitalized in CICU of a tertiary university hospital between 01 August 2017 and 01 August 2018. Files of all patients were examined in details, and demographic, clinic and laboratory parameters were recorded. Patients confirmed with psychiatry consultation were included in the groups of patients who developed delirium. Patients were divided into groups with and without delirium developed, and baseline features, inhospital and follow up prognoses were investigated. In addition, patients were divided into four groups as <65 years old, 65-75 yo, 75-84 yo and> 85 yo, and the incidence of delirium, related factors and prognoses were compared among these groups. A total of 1108 patients (mean age: 64.4 ± 13.9 years; 66% men) who were followed in the intensive care unit with variable indications were included in the study. Of all patients 11.1% developed delirium in the CICU. Patients who developed delirium were older, comorbidities were more frequent, and these patients showed increased inflammation findings, and significant increase in inhospital mortality compared to those who did not develop delirium (p<0.05). At median 9-month follow up period, rehospitalization, reinfarction, cognitive dysfunction, initiation of psychiatric therapy and mortality were significantly higher in the delirium group (p<0.05). When patients who developed delirium were divided into four groups by age and analyzed, incidence of delirium and mortality rate in delirium group were significantly increased by age (p<0.05). Development of delirium in coronary intensive care unit is associated with increased inhospital and follow up morbidity and mortality. Delirium is more commonly seen in geriatric patients and those with comorbidity, and is associated with a poorer prognosis. High-risk patients should be more carefully monitored for the risk of delirium.

Lege Artis Medicinae

APRIL 18, 2020

[Interrelations between antidepressants and diabetes]

HARGITTAY Csenge, GONDA Xénia, MÁRKUS Bernadett, VÖRÖS Krisztián, TABÁK Gy. Ádám, KALABAY László, RIHMER Zoltán, TORZSA Péter

[Diabetes and depression are frequent comorbidities. They are a heavy burden by themselves, however, as comorbidities increase additionally the number of diabetes-related complications, morbidity, and mortality. In the background of interrelations, there are both well-known and hypothetical mechanisms. The aim of the present review is to outline these interrelations between antidepressants and diabetes and to discuss the effect of medications on carbohydrate metabolism respectively. Anti­depressant treatment on the one hand may improve mood, cognitive function and medication adherence leading to an improved glucose metabolism, on the other hand through their metabolic side effects, they may worsen carbohydrate metabolism. Concerning metabolic side effects, selec­tive serotonin reuptake inhibitors are the sa­fest, while tricyclic antidepressants and mo­noamine oxidase inhibitors should be administered under close monitoring. Se­rotonin and noradrenaline reuptake inhibitors may deteriorate gly­cae­mic control via increased noradre­nergic activation. Novel antidepressants, how­ever, have a neutral or positive impact on gly­caemic measures. Screening for and temporally adjusted treatment of depres­sion may decrease the risk of comorbidities ge­nerated complications. While caring for diabetic patients with depression, one should consider metabolic side effects of antidepressants and close monitoring of carbohydrate metabolism.]