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1.
Bratisl Lek Listy ; 122(2): 95-100, 2021.
Article in English | MEDLINE | ID: mdl-33502876

ABSTRACT

INTRODUCTION: Data describing contemporary profile of infective endocarditis (IE) in the Czech Republic are lacking. The aim of this study was to describe the current profile and outcomes of IE patients. METHODS: Prospectively collected data on consecutive patients admitted for IE diagnosis between April 2016 and March 2018 to 11 main tertiary care cardiac centers in the Czech Republic were used for this analysis. RESULTS: Among 208 patients, 88 patients (42.3 %) had native valve IE (NVIE), 56 patients (26.9 %) had prosthetic valve IE (PVIE), and 57 patients (27.4 %) had intracardiac device-related IE (CDRIE). The mean age was 61.66±15.54 years. Staphylococcus aureus was the most common etiological agent of IE (27.4 %), whereas Culture negative IE was present in 26.4 % patients. Surgery was performed during hospitalization in 112 (53.8 %) patients. In-hospital death occurred in 21.2 % patients, while 1-year mortality was 40.3 %. In patients, who had an indication for surgery, but the procedure was not performed, mortality was significantly higher (p=0.002). CONCLUSION: High proportion of culture negative IE and IE related to artificial intra-cardiac materials calls for action. Furthermore, we show that cardiac surgery should be more often contemplated, especially in the presence of risk factors as septic shock and congestive heart failure (Tab. 6, Fig. 1, Ref. 32).


Subject(s)
Endocarditis, Bacterial , Aged , Czech Republic/epidemiology , Endocarditis, Bacterial/diagnosis , Endocarditis, Bacterial/epidemiology , Endocarditis, Bacterial/therapy , Hospital Mortality , Humans , Middle Aged , Prospective Studies , Registries , Risk Factors
2.
Physiol Res ; 67(2): 233-238, 2018 05 04.
Article in English | MEDLINE | ID: mdl-29303601

ABSTRACT

Primary aldosteronism (PA) is associated with objectively measured lower physical fitness and blunted response of the renin-angiotensin-aldosterone system to exercise. The purpose of this pilot study was to objectively measure exercise response of the renin-angiotensin-aldosterone system and cardiopulmonary fitness changes after laparoscopic adrenalectomy (ADE) in patients with unilateral PA. We examined a total of 14 patients with confirmed PA before and after ADE, by means of spiroergometry and hormonal evaluation. As expected, after adrenalectomy basal aldosterone (Aldo) levels before exercise decreased significantly, with a concomitant increase in plasma renin (PR). The increase in Aldo (285.9+/-171.3 to 434.1+/-278.2 ng/l; p=0.02) and blunted increase in PR (7.1+/-0.4 to 8.9+/-10.4 pg/ml; NS) post-exercise before ADE became significant after ADE Aldo post-ADE (46.8+/-18.8 to 106.5+/-68.1 ng/l; p<0.0001) and PR post-ADE (20.1+/-14.5 to 33.9+/-30.7 pg/ml; p=0.014). After adrenalectomy, the patients had a non-significant increase in peak workload and VO(2peak). We found normalization of the renin-angiotensin-aldosterone system response to exercise with little changes in cardiopulmonary fitness six months after ADE.


Subject(s)
Adrenalectomy , Exercise Tolerance , Hyperaldosteronism/physiopathology , Renin-Angiotensin System , Adult , Aldosterone , Anaerobic Threshold , Blood Pressure Monitoring, Ambulatory , Exercise Test , Female , Hormones/blood , Humans , Hyperaldosteronism/surgery , Male , Middle Aged , Physical Fitness , Pilot Projects , Potassium/blood , Treatment Outcome
3.
Physiol Res ; 66(Suppl 3): S397-S408, 2017 09 26.
Article in English | MEDLINE | ID: mdl-28948824

ABSTRACT

This work discusses the clinical performance of chromogranin A, free metanephrine and normetanephrine determination in plasma using a radioimmunoanalytical methods for the diagnosis of pheochromocytoma and paraganglioma. Blood samples were collected from 55 patients (46 pheochromocytomas, 9 paragangliomas). A sampling of biological materials was performed preoperatively and about one week, six months and one year after adrenal gland surgery. The comparative group without a diagnosis of pheochromocytoma/paraganglioma consisted of 36 pheochromocytoma/paraganglioma patients more than 4 months after adrenal gland surgery, and of 87 patients, 16 of them with multiple endocrine neoplasia, 9 with medullary and 5 with parafolicullar carcinoma of the thyroid gland. The rest were patients with various adrenal gland disorders. Chromogranin A, metanephrine and normetanephrine were determined in the EDTA-plasma using a radioimmunoassay kits Cisbio Bioassays, France and IBL International GmbH, Germany. Clinical sensitivity was 96 % for the combination of metanephrine and normetanephrine, and 93 % for chromogranin A. Clinical specificity was 100 % for the combination metanephrine and normetanephrine, and 96 % for chromogranin A. Falsely elevated levels of chromogranin A were observed in 1 patient with chronic renal insufficiency and 9 analyses were influenced by the administration of proton pump inhibitors. These results were excluded of CGA specificity. Both the combination of plasma free metanephrine, normetanephrine and chromogranin A as determined by radioimmunoassays, which are simple without the necessity of special laboratory material, are effective markers of pheochromocytoma or paraganglioma. Chromogranin A exerts association to malignity and all markers are associated with tumor mass.


Subject(s)
Adrenal Gland Neoplasms/blood , Biomarkers, Tumor/blood , Chromogranin A/blood , Metanephrine/blood , Normetanephrine/blood , Pheochromocytoma/blood , Adolescent , Adrenal Gland Neoplasms/diagnosis , Adult , Aged , Female , Humans , Male , Middle Aged , Pheochromocytoma/diagnosis , Radioimmunoassay/methods , Young Adult
4.
Physiol Res ; 66(1): 41-48, 2017 03 31.
Article in English | MEDLINE | ID: mdl-27782749

ABSTRACT

Hypokalemia as a typical feature of primary aldosteronism (PA) is associated with muscle weakness and could contribute to lower cardiopulmonary fitness. The aim of this study was to describe cardiopulmonary fitness and exercise blood pressure and their determinants during a symptom-limited exercise stress test in patients with PA. We performed a cross-sectional study of patients with confirmed PA who were included before adrenal vein sampling on whom a symptom-limited exercise stress test with expired gas analysis was performed. Patients were switched to the treatment with doxazosin and verapamil at least two weeks before the study. In 27 patients (17 male) the VO(2peak) was 25.4+/-6.0 ml/kg/min which corresponds to 80.8+/-18.9 % of Czech national norm. Linear regression analysis shows that VO(2peak) depends on doxazosin dose (DX) (p=0.001) and kalemia (p=0.02): VO(2peak) = 4.2 - 1.0 * DX + 7.6 * Kalemia. Patients with higher doxazosin doses had a longer history of hypertension and had used more antihypertensives before examination, thus indicating that VO(2peak) also depends on the severity of hypertension. In patients with PA, lower cardiopulmonary fitness depends inversely on the severity of hypertension and on lower plasma potassium level.


Subject(s)
Exercise Test , Hyperaldosteronism/physiopathology , Hypertension/physiopathology , Hypokalemia/physiopathology , Physical Fitness/physiology , Severity of Illness Index , Adult , Aged , Cross-Sectional Studies , Exercise Test/methods , Female , Humans , Hyperaldosteronism/diagnosis , Hypertension/diagnosis , Hypokalemia/diagnosis , Male , Middle Aged
5.
Physiol Res ; 65(2): 229-37, 2016 06 20.
Article in English | MEDLINE | ID: mdl-26447510

ABSTRACT

Primary aldosteronism (PA) is the most common cause of endocrine hypertension with a high frequency of cardiovascular complications. The unfavorable cardiometabolic profile may be due to aldosterone-mediated activation of inflammatory cells, circulatory cytokines and activation of collagen synthesis in the vessel wall. Aim of our study was to evaluate differences in the levels of hsCRP, IL-6, TNF-alpha and N-terminal propeptide of collagen I (PINP) in patients with PA and essential hypertension (EH) as a control group, and between the subtypes of PA (aldosterone producing adenoma - APA, idiopathic hyperaldosteronism - IHA). We studied 28 patients with PA (IHA - 10 patients, APA - 12 patients, 6 unclassified) and 28 matched patients with EH. There were no differences in the levels of inflammatory markers between the followed groups [EH vs. PA: TNF-alpha (5.09 [3.68-6.32] vs. 4.84 [3.62-6.50] pg/ml), IL-6 (0.94 [0.70-1.13] vs. 0.97 [0.71-1.28] pg/ml), hsCRP (0.53 [0.25-1.54] vs. 0.37 [0.31-0.61] mg/l), leukocytes (6.35+/-1.42 vs. 5.97+/-1.29 10(9) l); APA vs. IHA: TNF-alpha (4.54 [3.62-7.03] vs. 5.19 [4.23-5.27] pg/ml), IL-6 (0.96 [0.63-1.21] vs. 0.90 [0.65-1.06] pg/ml), hsCRP (0.34 [0.29-0.47] vs. 0.75 [0.36-1.11] mg/l), leukocytes (6.37+/-1.41 vs. 5.71+/-1.21 10(9) l)]. Significant differences in the levels of PINP between PA and EH group were observed (35.18 [28.46-41.16] vs. 45.21 [36.95-62.81] microg/l, p

Subject(s)
Hyperaldosteronism/blood , Hyperaldosteronism/diagnosis , Hypertension/blood , Hypertension/diagnosis , Inflammation Mediators/blood , Adult , Biomarkers/blood , Essential Hypertension , Female , Humans , Interleukin-6/blood , Male , Middle Aged , Tumor Necrosis Factor-alpha/blood
6.
J Hum Hypertens ; 30(1): 35-9, 2016 Jan.
Article in English | MEDLINE | ID: mdl-25833703

ABSTRACT

The aim of the study was to analyze the clinical use of different types of combination therapy in a large sample of consecutive patients with uncontrolled hypertension referred to Hypertension Centre. We performed a retrospective analysis of combination antihypertensive therapy in 1254 consecutive patients with uncontrolled hypertension receiving at least triple-combination antihypertensive therapy. Among the most prescribed antihypertensive classes were renin-angiotensin blockers (96.8%), calcium channel blockers (82.5%), diuretics (82.0%), beta-blockers (73.0%), centrally acting drugs (56.0%) and urapidil (24.1%). Least prescribed were spironolactone (22.2%) and alpha-1-blockers (17.1%). Thiazide/thiazide-like diuretics were underdosed in more than two-thirds of patients. Furosemide was prescribed in 14.3% of patients treated with diuretics, while only indicated in 3.9%. Inappropriate combination therapy was found in 40.4% of patients. Controversial dual and higher blockade of renin-angiotensin system occurred in 25.2%. Incorrect use of a combination of two antihypertensive drugs with the similar mechanism of action was found in 28.1%, most commonly a combination of two drugs with central mechanism (13.5%). In conclusion, use of controversial or incorrect combinations of drugs in uncontrolled hypertension is common. Diuretics are frequently underdosed and spironolactone remains neglected in general practice. The improper combination of antihypertensive drugs may contribute to uncontrolled hypertension.


Subject(s)
Antihypertensive Agents/therapeutic use , Hypertension/drug therapy , Practice Patterns, Physicians'/statistics & numerical data , Czech Republic , Drug Therapy, Combination , Female , Humans , Male , Middle Aged , Retrospective Studies , Treatment Outcome
7.
Physiol Res ; 64(Suppl 2): S313-22, 2015.
Article in English | MEDLINE | ID: mdl-26680494

ABSTRACT

This work discusses the clinical performance of deconjugated metanephrine (MN), normetanephrine (NMN) and 3-methoxytyramine (3MT) determined in the basal first morning urine using a chromatographic method with electrochemical detection for the clinical diagnosis of pheochromocytoma (PHEO) and paraganglioma (PGL). Urine samples were collected from 44 patients (36 with PHEO, 8 with PGL) aged 54+/-17 (20-78) years (22 females, 22 males). A sampling of biological materials was performed preoperatively and about one week, six months and one year after adrenal gland surgery. The control group consisted of 34 PHEO/PGL patients more than 4 months after adrenal gland surgery. All subjects in the control group were without a diagnosis of PHEO or PGL. Clinical sensitivity was 55 % for MN, 64 % for NMN, 80 % for combination of both MN and NMN, and only 23 % for 3TM. Clinical specificity calculated from the control group was 93 % for MN, 95 % for NMN, 95 % for the combination MN and NMN, and 97 % for 3TM. Cut-off values for deconjugated metanephrines in the basal urine were 310 (MN), 690 (NMN) and 250 microg/l (3MT). Chromatographic determination of deconjugated urinary metanephrines, which is simple without the necessity of special laboratory material, can serve for the screening of PHEO or PGL patients. Urine NMN and 3MT exerts an association to malignity, and all markers are associated with tumor mass. However, the principal laboratory diagnosis of PHEO or PGL must be based on plasma-free metanephrines and plasma chromogranin A with better performance in the laboratory diagnosis of PHEO or PGL.


Subject(s)
Adrenal Gland Neoplasms/urine , Dopamine/analogs & derivatives , Metanephrine/urine , Normetanephrine/urine , Paraganglioma/urine , Pheochromocytoma/urine , Adrenal Gland Neoplasms/diagnosis , Adult , Aged , Biomarkers/urine , Chromatography, High Pressure Liquid/methods , Clinical Laboratory Techniques/methods , Dopamine/urine , Female , Humans , Male , Middle Aged , Paraganglioma/diagnosis , Pheochromocytoma/diagnosis , Young Adult
8.
Horm Metab Res ; 47(9): 633-6, 2015 Aug.
Article in English | MEDLINE | ID: mdl-26177121

ABSTRACT

Pheochromocytomas are catecholamine-producing tumors with typical clinical presentation. Tumor resection is considered as an appropriate treatment strategy. Due to its unpredictable clinical behavior, biochemical testing is mandatory to confirm the success of tumor removal after surgery. The aim of the study was to investigate the feasibility of a shorter interval of postoperative testing (earlier than the recommended 2-4 weeks according to recently published Guidelines). We investigated 81 patients with pheochromocytoma before and after surgery. Postoperative examination was performed of stable subjects after their transport from the surgical to the internal ward (7.1±2.2 days after surgery). Plasma metanephrines were used for the diagnosis of pheochromocytoma and confirmation of successful tumor removal. All subjects with pheochromocytoma had markedly elevated plasma metanephrines before surgery. No correlation between postoperative interval (the shortest being 3 days) and plasma metanephrine levels was found. Postoperative plasma metanephrine levels did not differ significantly from those taken at the one-year follow-up. In conclusion, we have shown that early postoperative diagnostic workup of subjects with pheochromocytoma is possible and may thus simplify early postoperative management of this clinical condition.


Subject(s)
Adrenal Gland Neoplasms/blood , Adrenal Gland Neoplasms/surgery , Metanephrine/blood , Outcome Assessment, Health Care , Pheochromocytoma/blood , Pheochromocytoma/surgery , Adult , Aged , Female , Follow-Up Studies , Humans , Male , Middle Aged , Postoperative Period , Time Factors
9.
Physiol Res ; 63(Suppl 2): S251-62, 2014.
Article in English | MEDLINE | ID: mdl-24908231

ABSTRACT

Hypoxia-inducible factors (HIFs) are transcription factors controlling energy, iron metabolism, erythropoiesis, and development. Dysregulation of these proteins contributes to tumorigenesis and cancer progression. Recent findings revealed the important role of HIFs in the pathogenesis of neuroendocrine tumors, especially pheochromocytoma (PHEO) and paraganglioma (PGL). PHEOs and PGLs are catecholamine-producing tumors arising from sympathetic- or parasympathetic-derived chromaffin tissue. To date, eighteen PHEO/PGL susceptibility genes have been identified. Based on the main signaling pathways, PHEOs/PGLs have been divided into two clusters, pseudohypoxic cluster 1 and cluster 2, rich in kinase receptor signaling and protein translation pathways. Recent data suggest that both clusters are interconnected via the HIF signaling and its role in tumorigenesis is supported by newly described somatic and germline mutations in HIF2A gene in patients with PHEOs/PGLs associated with polycythemia, and in some of them also with somatostatinoma. Moreover, HIFalpha signaling has also been shown to be upregulated in neuroendocrine tumors other than PHEO/PGL. Some of these tumors are components of hereditary tumor syndromes which can be associated with PHEO/PGL, but also in ileal carcinoids or melanoma. HIF signaling appears to be one of the crucial players in tumorigenesis, which could suggest new therapeutic approaches for treatment of neuroendocrine tumors.


Subject(s)
Adrenal Gland Neoplasms/metabolism , Basic Helix-Loop-Helix Transcription Factors/metabolism , Hypoxia-Inducible Factor 1, alpha Subunit/metabolism , Neuroendocrine Tumors/metabolism , Pheochromocytoma/metabolism , Signal Transduction , Adrenal Gland Neoplasms/genetics , Adrenal Gland Neoplasms/pathology , Animals , Basic Helix-Loop-Helix Transcription Factors/genetics , Humans , Neuroendocrine Tumors/genetics , Neuroendocrine Tumors/pathology , Pheochromocytoma/genetics , Pheochromocytoma/pathology , Prognosis
10.
Physiol Res ; 63(Suppl 2): S299-308, 2014.
Article in English | MEDLINE | ID: mdl-24908236

ABSTRACT

The aim of our study was to explore the effects of regular aerobic exercise on anthropometric, biochemical and hormonal parameters and mRNA expression of selected factors involved in metabolic regulations in subcutaneous adipose tissue of patients with obesity. Fifteen obese women with arterial hypertension underwent a three-month exercise program consisting of 30 min of aerobic exercise 3 times a week. Fifteen healthy lean women with no intervention served as a control group. Obese group underwent anthropometric measurements, blood sampling, subcutaneous adipose tissue (SCAT) biopsy and 24-h blood pressure monitoring at baseline and after three months of exercise, while control group was examined only once. At baseline, obese group had increased SCAT expression of proinflammatory cytokines and adipokines relative to control group. Three months of regular exercise improved anthropometric parameters, decreased CRP, blood glucose and HOMA-IR, while having no significant effect on lipid profile and blood pressure. Gene expressions in SCAT were not affected by physical activity with the exception of increased aquaporin-3 mRNA expression. We conclude that three months of regular exercise decrease systemic subclinical inflammation with only minor influence on the blood pressure and the endocrine function of subcutaneous fat.


Subject(s)
Arterial Pressure , Exercise Therapy , Hypertension/physiopathology , Inflammation Mediators/blood , Inflammation/therapy , Obesity/therapy , Subcutaneous Fat/metabolism , Adipokines/blood , Adipokines/genetics , Biomarkers/blood , Cytokines/blood , Cytokines/genetics , Female , Humans , Hypertension/diagnosis , Inflammation/blood , Inflammation/diagnosis , Inflammation/genetics , Insulin Resistance , Middle Aged , Obesity/blood , Obesity/diagnosis , Obesity/physiopathology , RNA, Messenger/blood , Time Factors , Treatment Outcome
11.
J Hum Hypertens ; 28(11): 684-8, 2014 Nov.
Article in English | MEDLINE | ID: mdl-24500722

ABSTRACT

Catheter-based renal denervation (RD) has been introduced recently as a potentially effective invasive treatment of refractory hypertension. The proportion of patients with severe hypertension suitable for RD is not clear. The aim of this study was to identify what percentage of patients has truly resistant essential hypertension and are thus potentially eligible for RD. We investigated 205 consecutive patients referred to a university hypertension center for severe hypertension within 12 months. Ambulatory 24-h blood pressure (BP) monitoring (24 h ABPM), secondary hypertension screening and compliance to treatment testing (by use of plasma drug level measurements) were performed in all patients. Fifty-seven patients (27.8%) did not have truly resistant hypertension (RH) based on clinical BP. Among the remaining 122 patients (59.5%) with RH confirmed by 24 h ABPM, 50 patients (24.4% of the original cohort) had a secondary cause of hypertension and in 27 (13.2%) non-compliance to treatment was confirmed. Thus, only 45 patients (22%) had truly resistant essential hypertension and were considered for RD. Only one-third (n=15, 7.3% of the original cohort) was, however, finally referred for RD (14 were excluded due to contraindications for RD and 16 refused the invasive treatment). In conclusion, thorough examination of severe hypertension including 24 h ABPM, secondary hypertension exclusion and drug compliance testing before considering RD reveals that majority of these patients are not suitable for RD. Specifically, compliance to treatment testing should be mandatory in order to identify eligible candidates for RD.


Subject(s)
Antihypertensive Agents/therapeutic use , Autonomic Denervation/methods , Blood Pressure/drug effects , Drug Resistance , Hypertension/drug therapy , Hypertension/surgery , Kidney/innervation , Medication Adherence , Adult , Aged , Blood Pressure Monitoring, Ambulatory , Czech Republic , Drug Monitoring , Eligibility Determination , Female , Hospitals, University , Humans , Hypertension/diagnosis , Hypertension/physiopathology , Male , Middle Aged , Patient Selection , Predictive Value of Tests , Referral and Consultation , Retrospective Studies
13.
Vnitr Lek ; 59(6): 433-9, 2013 Jun.
Article in Czech | MEDLINE | ID: mdl-23808734

ABSTRACT

The paper presents the origins of the Czech Society of Cardiology on the one hand, and the origins of Czech cardiology on the other. The Czech Society of Cardiology is the third oldest in the world (after the American and German Societies). It was founded in 1929 by Prof. Libenský. As early as in 1933, the Society organised the first international congress of cardiologists in Prague, which was attended by 200 doctors, out of which 50 were from abroad. The most participants came from France and Poland. Other participants came from England, Argentina, Belgium, the Netherlands, Italy, Romania, Spain and Switzerland. The worldwide importance of this congress is apparent from the fact that both the World Society of Cardiology and the European Society of Cardiology (EKS) were founded after World War II in the years 1950 and 1952, i.e. almost 20 years after the first international congress of cardiology in Prague. In 1964, the Fourth Congress of European Society of Cardiology was held in Prague with the participation of 1,500 specialists from 31 countries and chaired by Prof. Pavel Lukl, the later president of EKS (1964- 1968). The paper also presents the work of our specialists in WHO and the history of the international journal Cor et Vasa issued by the Avicenum publishing house in Prague in English and Russian in the years 1958- 1992. An important role in the development of our cardiology was played by certain departments and clinics. In 1951, the Institute for Cardiovascular Research (ÚCHOK) was founded in PrahaKrc, thanks to the initiative of MU Dr. Frantisek Kriegl, the Deputy Minister of Health. Its first director was Klement Weber, who published, as early as in 1929, a monograph on arrhythmias -  50 years earlier than arrhythmias started to be at the centre of attention of cardiologists. Klement Weber was one of the doctors of President T. G. Masaryk during his serious disease towards the end of his life. Jan Brod was the deputy of Klement Weber in the Institute and the chair of its Scientific Council. The Institute for Cardiovascular Research was the third institute for cardiovascular diseases in the world. The origins of Czech cardiology are documented in three most important areas -  the treatment of hypertension, the development of cardiothoracic surgery and the development of treatment of acute myocardial infarction. Hradec Králové became, thanks to Academician Bedrna, the first centre of cardiac surgery in this country. The development of hypertension treatment was stormy, thanks to the discovery of an effective pharmacotherapy, from the originally incurable malignant hypertension to the well curable benign hypertension. The effective treatment of acute infarction was based on the development of heart defibrillation enabling the establishment of coronary units, and later on the thrombolytic and antiplatelet therapies up to the contemporary PCI as the treatment of choice. During that time, AIM mortality decreased from the original 30% to the present 4- 5%.


Subject(s)
Cardiology/history , Societies, Medical/history , Czechoslovakia , History, 20th Century , History, 21st Century , Humans
14.
Vnitr Lek ; 59(6): 501-4, 2013 Jun.
Article in Czech | MEDLINE | ID: mdl-23808747

ABSTRACT

Primary hyperaldosteronism (PH) is common cause of secondary hypertension with autonomous aldosterone overproduction by adrenal cortex with high plasma aldosterone, suppressed renin and high blood pressure. Patients with PH have compared to essential hypertension (EH) more frequent subclinical organ damage and higher cardiovascular risk (CV). Higher carotid IMT, arterial stiffness and microalbuminuria was found in PH. Early specific therapy of PH may lead to the regression of target organ damage and decrease of CV risk. Early diagnostic and therapeutic measures are very important due to high prevalence of PH.


Subject(s)
Cardiovascular Diseases/etiology , Hyperaldosteronism/complications , Hypertension/etiology , Humans , Hypertension/epidemiology , Middle Aged , Prevalence , Risk Factors
15.
Physiol Res ; 62(3): 331-5, 2013.
Article in English | MEDLINE | ID: mdl-23489186

ABSTRACT

High levels of catecholamines in pheochromocytoma (PHEO) are associated with risk of cardiovascular complications. In this study, we looked for potential differences in markers of oxidative stress - vitamin C, superoxide dismutase (SOD) and malondialdehyde (MDA) in PHEO before and after the operation. We studied 18 subjects with PHEO who were examined before and approximately one year after the successful tumor removal (free of disease). All subjects had elevated urinary epinephrine and/or norepinephrine levels before the operation. Vitamin C levels increased significantly after the operation from 61+/-27 to 77+/-20 micromol/l (P=0.02), and MDA decreased significantly after the tumor removal from 2.6+/-0.4 to 2.0+/-0.6 micromol/l (P=0.01). However, no changes were found in SOD activity before and after the operation. In conclusion, increased catecholamine production in PHEO is accompanied by decreased levels of vitamin C and increased levels of MDA which may indicate the activation of oxidative stress in PHEO. Successful operation was associated with lowering of oxidative stress by using both biomarkers. On the contrary, no changes in SOD activity before and after the tumor removal were noted.


Subject(s)
Ascorbic Acid/metabolism , Catecholamines/metabolism , Malondialdehyde/metabolism , Oxidative Stress , Pheochromocytoma/metabolism , Pheochromocytoma/surgery , Superoxide Dismutase/metabolism , Biomarkers/metabolism , Female , Humans , Male , Middle Aged , Pheochromocytoma/diagnosis , Reactive Oxygen Species/metabolism , Treatment Outcome
16.
J Clin Endocrinol Metab ; 98(4): 1651-8, 2013 Apr.
Article in English | MEDLINE | ID: mdl-23436923

ABSTRACT

CONTEXT: Catecholamine overproduction in pheochromocytoma affects basal metabolism, resulting in weight loss despite normal food intake. OBJECTIVE: The objective of the study was to evaluate changes in energy metabolism expressed as resting energy expenditure (REE) in patients with pheochromocytoma before and after adrenalectomy and the possible relationship with circulating inflammatory markers. DESIGN: We measured REE in 17 patients (8 women) with pheochromocytoma by indirect calorimetry (Vmax-Encore 29N system) before and 1 year after adrenalectomy. Body fat percentage was measured with a Bodystat device. Inflammatory markers (leukocytes count and C-reactive protein) and cytokines (TNF-α, IL-6, and IL-8) were analyzed with a Luminex 200. RESULTS: REE measured in the pheochromocytoma group was 10.4% higher than the predicted value (1731 ± 314 vs 1581 ± 271 kcal/d; P = .004). Adrenalectomy significantly increased body mass index (P =0.004) and the percentage of body fat (P = .01), with a proportional increase in fat distribution (waist circumference, P = .045; hip circumference, P = .001). REE significantly decreased after adrenalectomy (1731 ± 314 vs 1539 ± 215 kcal/d; P = .002), even after adjustments in body surface and body weight (P < .001). After adrenalectomy, we found a significant decrease in leukocyte counts (P = .014) and in the levels of TNF-α (P < .001), IL-6 (P = .048), and IL-8 (P = .007) but not C-reactive protein (P = .09). No significant correlations among calorimetry parameters, hormones, and proinflammatory markers were detected. CONCLUSIONS: Chronic catecholamine overproduction in pheochromocytoma may lead to a proinflammatory and hypermetabolic state characterized by increased REE. Adrenalectomy leads to the normalization of energy metabolism followed by an increase in body mass index and body fat content and decreases in inflammatory markers and cytokines.


Subject(s)
Adrenal Gland Neoplasms/metabolism , Energy Metabolism/physiology , Pheochromocytoma/metabolism , Adipose Tissue/drug effects , Adipose Tissue/pathology , Adrenal Gland Neoplasms/pathology , Adrenal Gland Neoplasms/surgery , Adrenalectomy/rehabilitation , Adult , Aged , Basal Metabolism/drug effects , Basal Metabolism/physiology , Body Composition/drug effects , Body Composition/physiology , Body Weight/drug effects , Body Weight/physiology , Catecholamines/blood , Catecholamines/metabolism , Catecholamines/pharmacology , Energy Metabolism/drug effects , Female , Humans , Male , Middle Aged , Organ Size/drug effects , Pheochromocytoma/pathology , Pheochromocytoma/surgery
18.
Kidney Blood Press Res ; 35(6): 529-33, 2012.
Article in English | MEDLINE | ID: mdl-22890049

ABSTRACT

Primary aldosteronism (PA) is a common form of arterial hypertension with a high prevalence of cardiovascular complications. In patients with PA, complex mechanisms may lead to functional and/or structural abnormalities of the blood vessel wall. Clinical evidence indicates that patients with PA may have immune cell activation, increased oxidative stress, impaired endothelial function and vascular remodeling. Activation of fibroproliferation has been found in resistant arteries of patients with PA. Subjects with PA compared to essential hypertensives with similar blood pressure levels have increased intima-media thickness and arterial stiffness as measured by pulse wave velocity. These functional and morphological changes can be modified by an increased sodium intake. Vascular remodeling in PA may indicate a poor response to specific therapy with lower probability of cure and/or normalization of blood pressure. Early diagnosis of PA before blood vessel wall disturbances develop is of utmost importance.


Subject(s)
Hyperaldosteronism/diagnosis , Hyperaldosteronism/epidemiology , Vascular Diseases/diagnosis , Vascular Diseases/epidemiology , Animals , Blood Flow Velocity/physiology , Blood Pressure/physiology , Humans , Hyperaldosteronism/physiopathology , Hypertension/diagnosis , Hypertension/epidemiology , Hypertension/physiopathology , Vascular Diseases/physiopathology , Vascular Resistance/physiology
19.
Physiol Res ; 61(5): 461-8, 2012.
Article in English | MEDLINE | ID: mdl-22881232

ABSTRACT

Aldosterone overproduction increases arterial wall stiffness by accumulation of different types of collagen fibres and growth factors. Our previous studies showed that central (aortic) arterial stiffness is increased in primary aldosteronism (PA) independently of concomitant hypertension and that these changes might be reversible after successful adrenalectomy. There is limited data available on the potential impact of mineralocorticoid overproduction on the deterioration of peripheral arterial stiffness. The current study was thus aimed at investigating the effect of aldosterone overproduction on peripheral arterial stiffness assessed by peripheral (femoral-ankle) pulse wave velocity (PWV) in PA patients compared with essential hypertension (EH) patients. Forty-nine patients with confirmed PA and 49 patients with EH were matched for age, blood pressure, body mass index, lipid profile, and fasting glucose. PWV was obtained using the Sphygmocor applanation tonometer. Both peripheral and central PWV were significantly higher in PA patients compared to EH patients, while clinical blood pressures were similar. Plasma aldosterone level was the main predictor of peripheral PWV in PA. Our data indicate aldosterone overproduction in PA does not preferentially affect central arterial system. Fibroproliferative effect of higher aldosterone levels lead to alteration of central-elastic as well as peripheral-muscular arteries with subsequent increase in its stiffness.


Subject(s)
Femoral Artery/physiopathology , Hyperaldosteronism/physiopathology , Hypertension/physiopathology , Peripheral Arterial Disease/physiopathology , Vascular Stiffness , Blood Pressure , Female , Humans , Hyperaldosteronism/complications , Hypertension/complications , Male , Middle Aged , Peripheral Arterial Disease/complications
20.
Physiol Res ; 61(4): 431-6, 2012.
Article in English | MEDLINE | ID: mdl-22670702

ABSTRACT

Primary aldosteronism (PA) is the most common cause of endocrine hypertension with a high frequency of cardiovascular complications. We found in our previous study higher occurrence of metabolic disturbances in patients with idiopathic hyperaldosteronism (IHA) compared to subjects with aldosterone-producing adenoma (APA). The aim of our present study is to evaluate potential differences in the frequency of end-organ damage (arterial stiffness and microalbuminuria) between two main types of PA. The diagnosis of the particular form of PA was based on adrenal venous sampling and/or histopathological examination. We analyzed clinical and laboratory data from 72 patients with PA (36 with IHA, 36 with APA). The arterial stiffness was expressed as the carotid-femoral pulse wave velocity (PWV) and the renal damage as urinary albumin excretion levels (UAE). Patients with IHA had significantly (p<0.03) higher prevalence of metabolic syndrome (17 % in APA, 35 % in IHA), higher triglycerides (1.37+/-0.71 mmol/l in APA, 1.85+/-0.87 mmol/l in IHA), lower HDL cholesterol (1.25+/-0.28 mmol/l in APA, 1.06+/-0.25 mmol/l in IHA), higher PWV (7.91+/-1.61 m/s in APA, 8.99+/-1.77 m/s in IHA) and higher UAE (12.93+/-2.21 mg/l in APA, 28.09+/-6.66 mg/l in IHA). It seems that patients with IHA may have a slightly different phenotype compared to APA.


Subject(s)
Aldosterone/metabolism , Hyperaldosteronism/metabolism , Hyperaldosteronism/physiopathology , Phenotype , Adenoma/metabolism , Adenoma/physiopathology , Adult , Albuminuria/urine , Female , Humans , Hyperaldosteronism/genetics , Male , Middle Aged , Prevalence , Pulse Wave Analysis , Vascular Stiffness/physiology
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