MARIA CLAUDIA COSTA IRIGOYEN
Projetos de Pesquisa
Unidades Organizacionais
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina - Médico
LIM/59 - Laboratório de Biologia Celular, Hospital das Clínicas, Faculdade de Medicina - Líder
LIM/05 - Laboratório de Poluição Atmosférica Experimental, Hospital das Clínicas, Faculdade de Medicina
LIM/65, Hospital das Clínicas, Faculdade de Medicina
LIM/59 - Laboratório de Biologia Celular, Hospital das Clínicas, Faculdade de Medicina - Líder
LIM/05 - Laboratório de Poluição Atmosférica Experimental, Hospital das Clínicas, Faculdade de Medicina
LIM/65, Hospital das Clínicas, Faculdade de Medicina
38 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 38
- Hypertension, Blood Pressure Variability, and Target Organ Lesion(2016) IRIGOYEN, Maria-Claudia; ANGELIS, Katia De; SANTOS, Fernando dos; DARTORA, Daniela R.; RODRIGUES, Bruno; CONSOLIM-COLOMBO, Fernanda MarcianoHypertensive patients have a higher risk of developing health complications, particularly cardiovascular (CV) events, than individuals with normal blood pressure (BP). Severity of complications depends on the magnitude of BP elevation and other CV risk factors associated with the target organ damage. Therefore, BP control and management of organ damage may contribute to reduce this risk. BP variability (BPV) has been considered a physiological marker of autonomic nervous system control and may be implicated in increased CV risk in hypertension. This review will present some evidence relating BPV and target organ damage in hypertension in clinical and experimental settings.
- Autonomic changes in young smokers: acute effects of inspiratory exercise(2013) RODRIGUES, Fernando; ARAUJO, Amanda Aparecida; MOSTARDA, Cristiano Teixeira; FERREIRA, Janaina; SILVA, Michelle Cristina de Barros; NASCIMENTO, Ademir Manoel; LIRA, Fabio Santos; ANGELIS, Katia De; IRIGOYEN, Maria Claudia; RODRIGUES, BrunoOne of the most important consequences of smoking is the development of cardiovascular diseases. However, little is known about the early consequences of smoking and the acute effects of a single inspiratory muscle exercise session (IME). We evaluated the acute effects of an IME on cardiac parameters of young smokers. Twelve nonsmokers (C) and fifteen smokers [S; 2.08 (1.0-3.2) pack-years] underwent an acute IME. We evaluated blood pressure (BP) and lactate, and we recorded RR interval for posterior analysis of heart rate variability (HRV), before and after IME. At baseline, systolic BP and HRV parameters in time and frequency domains were changed in S group in comparison with the C. Following IME, S group reduced systolic BP (-8 %), low frequency band (LF) (-21.4 %), LF/high frequency (HF) (-57 %), as well as increased RR variance (+105 %) and HF band. Our findings indicate that a single session of inspiratory muscle exercise was able to both reduce systolic BP and improve parasympathetic and sympathetic modulations in young smokers. The results of the current study highlight the importance of furthering research on this area to better elucidate the acute and chronic effects of inspiratory muscle training on early cardiovascular and pulmonary changes of cigarette smoking.
- Metabolic, hemodynamic and structural adjustments to low intensity exercise training in a metabolic syndrome model(2013) MORVAN, Eduardo; LIMA, Nathalia Edviges Alves; MACHI, Jacqueline Freire; MOSTARDA, Cristiano; ANGELIS, Katia De; IRIGOYEN, Maria Claudia; WICHI, Rogerio Brandao; RODRIGUES, Bruno; MAIFRINO, Laura Beatriz MesianoBackground: The increase in fructose consumption is paralleled by a higher incidence of metabolic syndrome, and consequently, cardiovascular disease mortality. We examined the effects of 8 weeks of low intensity exercise training (LET) on metabolic, hemodynamic, ventricular and vascular morphological changes induced by fructose drinking in male rats. Methods: Male Wistar rats were divided into (n = 8 each) control (C), sedentary fructose (F) and ET fructose (FT) groups. Fructose-drinking rats received D-fructose (100 g/l). FT rats were assigned to a treadmill training protocol at low intensity (30% of maximal running speed) during 1 h/day, 5 days/week for 8 weeks. Measurements of triglyceride concentrations, white adipose tissue (WAT) and glycemia were carried out together with insulin tolerance test to evaluate metabolic profile. Arterial pressure (AP) signals were directly recorded. Baroreflex sensitivity (BS) was evaluated by the tachycardic and bradycardic responses. Right atria, left ventricle (LV) and ascending aorta were prepared to morphoquantitative analysis. Results: LET reduced WAT (-37.7%), triglyceride levels (-33%), systolic AP (-6%), heart weight/body weight (-20.5%), LV (-36%) and aortic (-76%) collagen fibers, aortic intima-media thickness and circumferential wall tension in FT when compared to F rats. Additionally, FT group presented improve of BS, numerical density of atrial natriuretic peptide granules (+42%) and LV capillaries (+25%), as well as the number of elastic lamellae in aorta compared with F group. Conclusions: Our data suggest that LET, a widely recommended practice, seems to be particularly effective for preventing metabolic, hemodynamic and morphological disorders triggered by MS.
- Interval and continuous aerobic exercise training similarly increase cardiac function and autonomic modulation in infarcted mice(2017) ABAD, Cesar Cavinato Cal; NASCIMENTO, Ademir Manuel do; SANTOS, Leandro Eziquiel dos; FIGUEROA, Diego; RAMONA, Pamella; SARTORI, Michele; SCAPINI, Katie B.; ALBUQUERQUE, Oscar; MORAES-SILVA, Ivana Cinthya; COELHO-JUNIOR, Hello Jose; RODRIGUES, Bruno; MOSTARDA, Cristiano Teixeira; ANGELIS, Katia De; IRIGOYEN, Maria ClaudiaThe present study aimed to compare the effects of moderate-intensity continuous and high-intensity interval exercise training (ET) on exercise tolerance, cardiac morphometry and function, hemodynamic, and cardiac autonomic modulation in myocardial infarcted mice. Wild-type mice (WT) were divided into four groups: sedentary WT (S); WT myocardium infarction sedentary (IS); WT myocardium infarction underwent to moderate-intensity continuous ET (MICT), and WT myocardium infarction underwent to high-intensity interval ET (MIIT). After 60 days of descending coronary artery ligation, moderate-intensity continuous ET consisted of running at 60% of maximum, while the high-intensity interval training consisted of eight sprints of 4 min at 80% of maximum and a 4-min recovery at 40% of maximum. Both exercises were performed 1 hr a day, 5 days a week, during 8 weeks. Results demonstrated that IS showed elevated exercise tolerance, as well as decreased hemodynamic and heart function, and autonomic control. On the other hand, both programs of ET were equally effective to increase all parameters, without further differences between the groups. In conclusion, the results of the present study showed that myocardial infarction leads to damage in both investigated strains and the two types of physical exercise attenuated the major impairments provoked by myocardial infarction in exercise tolerance, cardiac structure, cardiac function, hemodynamic and cardiac autonomic modulation.
- Aerobic Training Is Better Than Resistance Training on Cardiac Function and Autonomic Modulation in Female ob/ob Mice(2019) CONTI, Filipe Fernandes; IRIGOYEN, Maria-Claudia; SARTORI, Michelle; RIBEIRO, Amanda Aparecida; SANTOS, Fernando dos; MACHI, Jacqueline Freire; FIGUEROA, Diego Mendrot Taboas; RODRIGUES, Bruno; ANGELIS, Katia DeObjective: This study evaluated the effects of aerobic, resistance, and combined exercise training on cardiac function and autonomic modulation in female ob/ob mice. Methods: Four-week-old female wild type and obese (ob/ob) mice were divided into five groups (n = 8): control (WT), obese (OB) obese + aerobic training (OBA), obese + resistance training (OBR), and obese + combined training (OBC). The exercise training was performed on treadmill and/or ladder at 40-60% maximum test during 8 weeks. Cardiac function was measured using echo machine. Heart rate variability (HRV) was evaluated in the time and frequency domain. Results: OB group presented higher body weight gain (similar to 600%), glycemia (similar to 44%) and glucose intolerance (similar to 150%), reduction of cardiac vagal modulation, evidenced by a lower RMMSD (similar to 56%), total power and high frequency band, and a higher isovolumic relaxation time (IVRT) (similar to 24%) in relation to the WT group. Aerobic and combined training led to a lower IVRT (OBA: similar to 14%; OBC: similar to 14%) and myocardial global index (OBA: similar to 37%; OBC: similar to 44%). The OBA group presented an increased in vagal indexes of HRV than the other ob/ob groups. A negative correlation was observed between the delta of aerobic exercise capacity and MPI (r = 0.45; p = 0.002) and exercise capacity and body weight gain (r = 0.39; p = 0.002). Conclusion: Only the obese females underwent to aerobic exercise training showed improvement in cardiac function and HRV. Moreover, the aerobic exercise capacity as well as a greater responsivity to aerobic exercise training is intimately associated with these improvements, reinforcing the importance of aerobic exercise training to this population.
article 9 Citação(ões) na Scopus Baroreflex deficiency induces additional impairment of vagal tone, diastolic function and calcium handling proteins after myocardial infarction(2014) MOSTARDA, Cristiano; RODRIGUES, Bruno; MEDEIROS, Alessandra; MOREIRA, Edson D.; MORAES-SILVA, Ivana C.; BRUM, Patricia C.; ANGELIS, Katia De; IRIGOYEN, Maria-ClaudiaBaroreflex dysfunction has been considered an important mortality predictor after myocardial infarction (MI). However, the impact of baroreflex deficiency prior to MI on tonic autonomic control and cardiac function, and on the profile of proteins associated with intracellular calcium handling has not yet been studied. The aim of the present study was to analyze how the impairment of baroreflex induced by sinoaortic denervation (SAD) prior to MI in rats affects the tonic autonomic control, ventricular function and cardiomyocyte calcium handling proteins. After 15 days of following or SAD surgery, rats underwent MI. Echocardiographic, hemodynamic, autonomic and molecular evaluations were performed 90 days after MI. Baroreflex impairment led to additional damage on: left ventricular remodeling, diastolic function, vagal tonus and intrinsic heart rate after MI. The loss of vagal component of the arterial baroreflex and vagal tonus were correlated with changes in the cardiac proteins involved in intracellular calcium homeostasis. Furthermore, additional increase in sodium calcium exchanger expression levels was associated with impaired diastolic function in experimental animals. Our findings strongly suggest that previous arterial baroreflex deficiency may induce additional impairment of vagal tonus, which was associated with calcium handling proteins abnormalities, probably triggering ventricular diastolic dysfunction after MI in rats.- Aerobic Exercise Training Delays Cardiac Dysfunction and Improves Autonomic Control of Circulation in Diabetic Rats Undergoing Myocardial Infarction(2012) RODRIGUES, Bruno; JORGE, Luciana; MOSTARDA, Cristiano T.; ROSA, Kaleizu T.; MEDEIROS, Alessandra; MALFITANO, Christiane; SOUZA JR., Alcione L. de; VIEGAS, Katia Apareceda da Silva; LACCHINI, Silvia; CURI, Rui; BRUM, Patricia C.; ANGELIS, Katia De; IRIGOYEN, Maria ClaudiaBackground: Exercise training (ET) has been used as a nonpharmacological strategy for treatment of diabetes and myocardial infarction (MI) separately. We evaluated the effects ET on functional and molecular left ventricular (LV) parameters as well as on autonomic function and mortality in diabetics after MI. Methods and Results: Male Wistar rats were divided into control (C), sedentary-diabetic infarcted (SDI), and trained-diabetic infarcted (TDI) groups. MI was induced after 15 days of streptozotocin-diabetes induction. Seven days after MI, the trained group underwent ET protocol (90 days, 50-70% maximal oxygen consumption-VO(2)max). LV function was evaluated noninvasively and invasively; baroreflex sensitivity, pulse interval variability, cardiac output, tissue blood flows, VEGF mRNA and protein, HIF1-alpha mRNA, and Ca2+ handling proteins were measured. MI area was reduced in TDI (21 +/- 4%) compared with SDI (38 +/- 4%). ET induced improvement in cardiac function, hemodynamics, and tissue blood flows. These changes were probable consequences of a better expression of Ca2+ handling proteins, increased VEGF mRNA and protein expression as well as improvement in autonomic function, that resulted in reduction of mortality in TDI (33%) compared with SDI (68%) animals. Conclusions: ET reduced cardiac and peripheral dysfunction and preserved autonomic control in diabetic infarcted rats. Consequently, these changes resulted in improved VO(2)max and survival after MI.
- Ventricular and autonomic benefits of exercise training persist after detraining in infarcted rats(2013) BARBOZA, Catarina Andrade; ROCHA, Leandro Yanase; MOSTARDA, Cristiano Teixeira; FIGUEROA, Diego; CAPERUTO, Erico Chagas; ANGELIS, Katia De; IRIGOYEN, Maria Claudia; RODRIGUES, BrunoWe evaluate the effects of detraining (DT, for 1 month) on the left ventricular (LV) remodeling and function, hemodynamic and baroreflex sensitivity (BRS), as well as on mortality rate of infarcted (MI) rats after 3 months of exercise training (ET, 50-70 % of VO2max). Male Wistar rats were divided into five groups: control (C, n = 10), untrained-infarcted (UI, n = 15), trained-infarcted (TI, n = 12), untrained-infarcted plus 1 month (UI-1, n = 15) and detrained-infarcted 1 month (DI-1, n = 15). LV function was evaluated by echocardiography at the initial and final of the protocols. After following, ET and/or DT protocols, hemodynamic and BRS [by tachycardic (TR) and bradycardic (BR) responses] were assessed. TI group displayed increased VO2max in comparison with UI and DI-1 groups; however, DI-1 values remained increased compared to UI-1 group. MI area was reduced by ET and maintained after DT. Ejection fraction (TI = 60 +/- A 2 and DI-1 = 61 +/- A 2 % vs. UI = 41 +/- A 1 and UI-1 = 37 +/- A 3 %), E/A ratio (TI = 1.6 +/- A 0.1 and DI-1 = 1.9 +/- A 0.1 vs. UI = 2.9 +/- A 0.2 and UI-1 = 2.9 +/- A 0.3), TR (TI = 3.3 +/- A 0.3 and DI-1 = 3.3 +/- A 0.4 vs. UI = 1.7 +/- A 0.1 and UI-1 = 1.6 +/- A 0.1 bpm/mmHg) and BR (TI = -2.2 +/- A 0.1 and DI-1 = -2.0 +/- A 0.1 vs. UI = -1.3 +/- A 0.09 and UI-1 = -1.2 +/- A 0.09 bpm/mmHg) were improved by ET and maintained after DT in comparison with untrained rats. These changes resulted in mortality reduction in the TI (8 %) and DI-1 groups (13 %) compared with the UI (46 %) and UI-1 (53 %) groups. These findings indicate that ET is not only an effective tool in the management of cardiovascular and autonomic MI derangements, but also that these positive changes were maintained even after 1 month of DT in rats.
article 10 Citação(ões) na Scopus Arg16Gly and Gln27Glu beta 2 adrenergic polymorphisms influence cardiac autonomic modulation and baroreflex sensitivity in healthy young Brazilians(2015) ATALA, Magda M.; GOULART, Alessandra; GUERRA, Grazia M.; MOSTARDA, Cristiano; RODRIGUES, Bruno; MELLO, Priscila R.; CASARINE, Dulce E.; IRIGOYEN, Maria-Claudia; PEREIRA, Alexandre C.; CONSOLIM-COLOMBO, Fernanda M.The association between functional beta(2) adrenergic receptor (beta(2)-AR) polymorphisms and cardiac autonomic modulation is still unclear. Thus, two common polymorphisms in the beta(2)-AR gene (Gln27Glu beta(2) and Arg16Gly beta(2)) were studied to determine whether they might affect tonic and reflex cardiac sympathetic activity in healthy young subjects. A total of 213 healthy young white subjects of both genders (53% female), aged 18-30 years (23.5 +/- 3.4 y), had their continuous blood pressure curves noninvasively recorded by Finometer at baseline, and other hemodynamic parameters, as cardiac autonomic modulation, baroreflex sensitivity, and allele, genotype, and diplotype frequencies calculated. Associations were made between Arg16Gly beta(2) and Gln27Glu beta(2) polymorphisms and between beta(2)-AR diplotypes and all variables. The heart rate was significantly lower (P<0.001) in the presence of homozygous Arg/Arg alleles (60.9 +/- 1.5 bpm) than in that of Arg/Gly heterozygotes (65.9 +/- 1.0 bpm) or Gly/Gly homozygotes (66.3 +/- 1.2 bpm). Homozygous carriers of Arg16 allele had an alpha index (19.2 +/- 1.3) significantly higher (P<0.001) than that of the subjects with the Gly allele Gly/Gly ( 14.5 +/- 0.7) or Arg/Gly (14.6 +/- 0.7). Furthermore, the recessive Glu27Glu and the heterozygous Gln27Glu genotypes had a higher percentage of low-frequency components (LF%) than the homozygous Gln27Gln (15.1% vs. 16.0% vs. 8.2%, P=0.03, respectively). In healthy young subjects, the presence of beta(2)-AR Arg16 allele in a recessive model was associated with higher baroreflex sensitivity, and increased parasympathetic modulation in studied individuals.- Hypertension, Sarcopenia, and Global Cognitive Function in Community-Dwelling Older Women: A Preliminary Study(2018) COELHO-JUNIOR, Helio Jose; GAMBASSI, Bruno Bavaresco; IRIGOYEN, Maria-Claudia; GONCALVES, Ivan de Oliveira; OLIVEIRA, Paula de Lourdes Lauande; SCHWINGEL, Paulo Adriano; ALVES, Candida Helena Lopes; ASANO, Ricardo Yukio; UCHIDA, Marco Carlos; RODRIGUES, BrunoThe present study aimed to investigate whether sarcopenia interferes in the association between HTN and cognitive function in community-dwelling older women. One hundred and eleven older women were recruited and dichotomized in hypertensive (n = 63) and normotensive groups (n = 48). Volunteers underwent evaluations of the sarcopenic state (i.e., skeletal muscle mass, short physical performance battery (SPPB), balance), hemodynamic parameters, and global cognitive status (i.e., Mini-Mental State Examination (MMSE)). Data demonstrated that hypertensive patients had lower global cognitive status than normotensive subjects. When volunteers were divided according to sarcopenic status, data demonstrated that hypertensive patients with low performance on SPPB (0.006), low values of sarcopenic index (0.03), and low performance on sit-to-stand (0.09) demonstrated poor cognitive status compared with hypertensive patients with normal values of these variables. In conclusion, data of the current study indicate that the sarcopenic state might interfere in the association among hypertension and poor cognitive status, once a higher frequency of hypertensive patients with low lower limb muscle function (i.e., SPPB and sit-to-stand) and muscle mass index (i.e., Janssen index) was observed in the <24 MMSE segment, in comparison with hypertensive patients with normal results in these parameters.