AMP -activated protein kinase (AMPK) plays a role in metabolic regulation under stress conditions, and inadequate AMPK signaling may be also involved in aging process. The aim was to find out whether AMPK α 2-subunit deletion affects heart function and ische mic tolerance of adult and aged mice. AMPK α 2 -/- (KO) and wild type (WT) female mice were compared at the age of 6 and 18 months. KO mice exhibited subtle myocardial AMPK α 2-subunit protein level, but no difference in AMPK α 1-subunit was detected between the strains. Both α 1- and α 2-subunits of AMPK and their phosphorylation decreased with advanced age. Left ventricular fractional shortening was lower in KO than in WT mice of both age groups and this difference was maintained after high-fat feeding. Infarct size induced by global ischemia/reperfusion of isolated hearts was similar in both strains at 6 months of age. Aged WT but not KO mice exhibited improved ischemic tolerance compared with the younger group. High-fat feeding for 6 months during aging abolished the infarct size-reduction in WT without affecting KO animals; nevertheless, the extent of injury remained larger in KO mice. The results demonstrate that adverse effects of AMPK α 2-subunit deletion and high-fat feeding on heart function and myocardia l ischemic tolerance in aged female mice are not additive., K. Slámová, F. Papoušek, P. Janovská, J. Kopecký, F. Kolář., and Obsahuje bibliografii
Background: We have analyzed the aged population disability processes to establish specifics and regularities of the causal structure of disability among the working and nonworking aged population. Methods: In total, 1208 examination reports of the Medical & Social Expert Commission have been subjected to excerption in Almaty. Results: Persons having the second disability status prevail in the working aged contingent 4,4%, which is much higher than the ratios for the first and second disability statuses (0,4% and 0,6%, respectively). Among the nonworking population, persons having the second disability status largely prevail too 8,1% (3,1% and 1,1%, respectively). The casual structure of disability among the nonworking disabled persons includes as follows: blood circulatory system diseases (40%), malignant neoplasms (27,2%), and diseases of the eye and its appendages (10,2%). They are followed by endocrine diseases, nutritional and metabolic disturbances (7,6%), bodily injuries (3%), and urogenital system diseases with musculoskeletal system ones 2,3% each. The data collection for the working aged population contingent has found out blood circulatory system diseases (47%) and malignant neoplasms (34,4%). Alongside with that, the distinctive feature among the said aged population cohort is a substantial predominance of bodily injuries (7,4%), endocrine diseases, nutritional and metabolic disturbances (2,3%), and only 1,4% is accounted for diseases of the eye and its appendages., Akmaral K. Abikulova, Kazbek A. Tulebaev, Aikan A. Akanov, Botagoz S. Turdalieva, Sundetgali B. Kalmahanov, Mussaeva A. Bakhit, Aldamzharova K. Madina, and Literatura
Ageing is accompanied by deterioration in physical condition and a number of physiological processes and thus a higher risk of a range of diseases and disorders. In particular, we focused on the changes associated with aging, especially the role of small molecules, their role in physiological and pathophysiological processes and potential treatment options. Our previously published results and data from other authors lead to the conclusion that these unwanted changes are mainly linked to the hypothalamic-pituitary-adrenal axis can be slowed down, stopped, or in some cases even reversed by an appropriate treatment, but especially by a life-management adjustment., Martin Hill, Zdeněk Třískala, Pavla Honců, Milada Krejčí, Jiří Kajzar, Marie Bičíková, Leona Ondřejíková, Dobroslava Jandová, Ivan Sterzl., and Obsahuje bibliografii
Considerable evidence demonstrates that phenotypic switching of vascular smooth muscle cells (VSMCs) is influenced by aging and hypertension. During phenotypic switching, VSMCs undergo a switch to a proliferative and migratory phenotype, with this switch being a common pathology in cardiovascular diseases. The aim of this study was to explore the joint influence of age and hypertension on thoracic aortic smooth muscle phenotypic switching and the balance of Akt and mitogen-activated protein kinase (MAPK) signaling during this switch. Different ages of spontaneously hypertensive rats (SHR) and Wistar-Kyoto rats (WKY) were used to establish hypertension and aging models. The phenotypic state was determined by detecting the marker proteins α-SM-actin, calponin, and osteopontin (OPN) via immunohistochemical staining and Western blot. Signaling proteins associated with the Akt and MAPK pathways were detected in rat thoracic aorta using Western blot. Both aging and hypertension caused a decrease in contractile (differentiated) phenotype markers (α-SM-actin and calponin), while the synthetic (proliferative or de-differentiated) phenotype maker was elevated (OPN). When combining hypertension and aging, this effect was enhanced, with Akt signaling decreased, while MAPK signaling was increased. These results suggested that VSMCs phenotype switching is modulated by a balance between Akt and MAPK signaling in the process of aging and hypertension., Lin Zhang, Zhaoxia Xu, Ying Wu, Jingwen Liao, Fanxing Zeng, Lijun Shi., and Obsahuje bibliografii
The aim of this study was to compare the central and peripheral components of cardiorespiratory fitness during incremental to maximal exercise between older men who were either recreational athletes (RA) or leisurely active (LA) men, i.e., those who fall between trained and untrained. This was a crosssectional study in which all subjects completed an exercise test on a cycle ergometer. Maximal oxygen consumption (VO2max) and ventilatory threshold (VT) were assessed using gas analysis, and central components of VO2max were assessed using a non-invasive thoracic bio-impedance device. VO2max (RA: 45.1±4.8 ml/kg/min; LA: 32.2±4.6 ml/kg/min, p≤0.001) and SV at maximal exercise (RA: 133.5±24.96 ml/beat; LA: 107.9±17.6 ml/beat, p=0.005) were higher in the RA group compared to the LA group. A plateau in SV occurred between 30-45 % of maximal exercise capacity in the RA group. No differences in SV were observed across workloads in the LA group. No differences in the calculated arterio-venous oxygen difference ((a-v)O2diff) were observed between groups. In conclusions, training volume appears to influence central components of cardiorespiratory fitness among a matched sample of older men who are neither trained nor untrained. This builds a case for increasing the volume of training to preserve cardiorespiratory fitness among older men., C. D. O'neill, D. S. Kimmerly, S. Dogra., and Obsahuje bibliografii
Dyslipoproteinemie v rámci metabolického syndromu se jako jeden z klasických rizikových faktorů aterosklerotických kardiovaskulámích chorob uplatňuje i ve vyšším věku. Prediktivní význam zvýšených koncentrací celkového cholesterolu, LDL cholesterolu, HDL cholesterolu a triacylglycerolů je u geriatrických jedinců zachován. Doporučení k léčbě nejsou jednotná, ale shodně zdůrazňují individuální přístup. Kandidáty léčby jsou zejména nemocní s diagnózou ischemické choroby srdeční (ICHS) a se subklinickými formami iCHS, kde má léčba prokazatelný efekt do dvou let od zahájení a kde vede ke snížení rizika budoučí koronárni příhody až o 45 %. Méně často budeme léčit jedince s absencí ICHS a ostatních rizikových faktorů. Základem hypolipidemické intervence u pacientů vyššího věku je dieta. Nezapomínáme na pohybový režim. Farmakoterapie dyslipidemil je určena pro jedince s vysokým rizikem. Zahajujeme nižší dávkou obvykle fibrátů, při převažujícím zvýšení LDL-cholesterolu podáváme statiny a monitorujeme nežádoucí účinky léčby., Dyslipoproteinemia of metabolic syndrom as one among classical risk faaors of atherosclerotic cardiovascular diseases has been involved also in the aged. The prediaive value of total cholesterol, LDL cholesterol, HDL cholesterol and triacylglycerols is preserved. The therapeutic guidelines are not unique, but they stress an individual approach. Candidates of treatment are mainly the patients with diagnose of coronary heart disease (CHD) and sublinic form of CHD, where the treatment has been effeaive within two years and lead to decrease of CHD risk up to 45%. The individuals with CHD and other CHD risk faaors absent would be treated less ofl:en. The diet is an basic treatment option of hypolipidemic intervention in the elderly. We do not omit exercise. The pharmacotherapy of dyslipidaemia is used for the individuals with high risk. We usually start with lower dose of fibrates and/or statins in prevailing LDL-hypercholesterolemia, and monitor for adverse effects of such therapy., Vladimír Bláha, Dagmar Solichová, Zdeněk Zadák, Lit: 8, and Souhrn: eng
a1_Reduced tolerance to ischemia/reperfusion (IR) injury has been shown in elder human and animal hearts, however, the onset of this unfavorable phenotype and cellular mechanisms behind remain unknown. Moreover, aging may interfere with the mechanisms of innate cardioprotection (preconditioning, PC) and cause defects in protective cell signaling. We studied the changes in myocardial function and response to ischemia, as well as selected proteins involved in “pro-survival” pathways in the hearts from juvenile (1.5 months), younger adult (3 months) and mature adult (6 months) male Wistar rats. In Langendorffperfused hearts exposed to 30-min ischemia/2-h reperfusion with or without prior PC (one cycle of 5-min ischemia/5-min reperfusion), we measured occurrence of reperfusion-induced arrhythmias, recovery of contractile function (left ventricular developed pressure, LVDP, in % of pre-ischemic values), and size of infarction (IS, in % of area at risk size, TTC staining and computerized planimetry). In parallel groups, LV tissue was sampled for the detection of protein levels (WB) of Akt kinase (an effector of PI3-kinase), phosphorylated (activated) Akt (p-Akt), its target endothelial NO synthase (eNOS) and protein kinase Cε (PKCε) as components of “pro-survival” cascades. Maturation did not affect heart function, however, it impaired cardiac response to lethal IR injury (increased IS) and promoted arrhythmogenesis. PC reduced the occurrence of malignant arrhythmias, IS and improved LVDP recovery in the younger animals, while its efficacy was attenuated in the mature adults. Loss of PC protection was associated with age-dependent reduced Akt phosphorylation and levels of eNOS and PKCε in the hearts of mature animals compared with the younger ones, as well as with a failure of PC to upregulate these proteins., a2_Agingrelated alterations in myocardial response to ischemia may be caused by dysfunction of proteins involved in protective cell signaling that may occur already during the process of maturation., L. Griecsová, V. Farkašová, I. Gáblovský, V. K. M. Khandelwal, I. Bernátová, Z. Tatarková, P. Kaplan, T. Ravingerová., and Obsahuje bibliografii
V článku se popisuje vývoj spotřeby léčiv v ČR ve vztahu k demografické struktuře obyvatel. Na základě vlastního výběrového šetření mezi více než i 700 respondenty ve věku 60 a více let je referováno o průměrné spotřebě léčiv podle pohlaví a věku, je podán přehled nejčastěji předepisovaných léků a léků volně prodejných, výše doplatků za léky. Při preskripci by mělo být vedle hlediska účinnosti a bezpečnosti u předepisovaných léků bráno v úvahu hledisko ekonomické racionality, jako naléhavé se jeví postupné vypracování farmakoterapeutických guidelines pro léčení seniorů, výchova lékařů v klinické farmakoekonomice a prohloubení spolupráce mezi lékari, farmaceuty a pacienty., Changes of drug consumption in relation to the demographical structure of the poplation in Czech Republic are described in the paper. On the basis of own selective examination in more than 1700 respondents of age 60+, mean consumption of drugs accordig to age and gender, summary of most frequent prescribed or over-the-counter drugs and the extent of payments for drugs is referred. Beside effectiveness and safety of prescribed drugs, economical rationality should be taken into account in drug prescription. Gradual elaboration of pharmacotherapeutic guidelines for the treatment of seniors, education of physicians in clinical pharmacoeconomy and extension of collaboration between physicians, pharmacologisats and patients seems very imperative., Lenka Práznovcová, Lit: 12, and Souhrn: eng
V populaci starších osob je běžný úbytek funkčních kapacit, postupný vznik různých nemocí až k širší multimorbiditě a nárůstu problémů v sociální oblasti, které mohou akcentovat stařeckou křehkost a neschopnost žít samostatně. Článek rozebírá komplexně problematiku geriatrické multimorbidity a klade důraz na její úskalí a rizika, potřebu interdisciplinárního přístupu a myšlení lékařů, a to včetně úskalí moderní farmakoterapie. Cílem geriatrické medicíny je optimalizace reziduálních funkcí navzdory poklesu celkových funkčních kapacit organizmu při rostoucí multimorbiditě. Autoři chtějí tímto přehledovým článkem především upozornit i odbornou veřejnost na neustále rostoucí počet seniorů v populaci a na potřebu povědomí umět správně interpretovat a chápat tuto zcela novou realitu., In the elderly population there are common permanent decrease of functional capacity, gradual emergence of various diseases leading to the wider multimorbidity and increased problems in the social sphere, which can develop frailty and social dependency. The paper analyzes the complex issue of geriatric multimorbidity and emphasizes its pitfalls, the need of an interdisciplinary approach and thinking of doctors, including the risks of modern pharmacotherapy. The aim of geriatric medicine is to optimize residual functions despite the decline in total functional capacity with increasing multimorbidity. The authors want to direct the attention of the professional community to the permanently growing numbers of the elderly and to emphasize the need of awareness of the problem so that they could understand and cope with this absolutely new reality., and Pavel Weber, Dana Prudius, Hana Meluzínová