Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 21
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Assunto da revista
Intervalo de ano de publicação
1.
Cureus ; 16(4): e58416, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38756263

RESUMO

Alzheimer's disease (AD) is the most common neurodegenerative condition and a form of dementia encountered in medical practice. Despite many proposed and attempted treatments, this disease remains a major puzzle in the public health systems worldwide. The initial part of this article provides an overview and illustration of the primary mechanisms responsible for neuronal damage in AD. Subsequently, it offers a critical evaluation of the most noteworthy studies on pharmacological therapy for AD and outlines recent advancements and novel approaches to managing this condition. Main properties, categorization, Food and Drug Administration (FDA) status, mechanisms of action, benefits, and common side effects of the classical and the most recently proposed pharmacological treatments for AD are described. The conventional pharmacological agents revised comprise cholinesterase inhibitors, monoclonal antibodies, and other therapies, such as memantine, valproic acid, and rosiglitazone. The innovative reviewed pharmacological agents comprise the monoclonal antibodies: donanemab, gantenerumab, solanezumab, bapineuzumab, crenezumab, and semorinemab. Nutritional supplements such as alpha-tocopherol (vitamin E) and caprylidene are also revised. Tau and amyloid-targeting treatments include methylthioninium moiety (MT), leuco-methylthioninium bis (LMTM), an oxidized form of MT, and tramiprosate, which inhibits the beta-amyloid (Aß) monomer aggregation into toxic oligomers. Antidiabetic and anti-neuroinflammation drugs recently proposed for AD treatment are discussed. The antidiabetic drugs include NE3107, an anti-inflammatory and insulin sensitizer, and the diabetes mainstream drug metformin. The anti-neuroinflammatory AD therapies include the use of sodium oligomannate (GV-971), infusions with intravenous immunoglobulin aiming to decrease plasma levels of the constituents of Aß plaques, and masitinib, a tyrosine kinase inhibitor that impacts mast and microglia cells. Additional anti-inflammatory agents being currently tested in phase-2 clinical trials, such as atomoxetine (selective norepinephrine reuptake inhibitor), losartan (angiotensin 2 receptor agonist), genistein (anti-inflammatory isoflavone neuroprotective agent), trans-resveratrol (polyphenol antioxidant plant estrogen), and benfotiamine (synthetic thiamine precursor), were reviewed. Lastly, drugs targeting Alzheimer's-associated symptoms, such as brexpiprazole (serotonin dopamine activity modulator) and suvorexant (orexin receptor antagonist), respectively, used for agitation and insomnia in AD patients, are reviewed. As experimental investigations and clinical research progress, there is a possibility that a combination of newly tested medications and traditional ones may emerge as a promising treatment option for AD in the future.

2.
Cureus ; 16(3): e56561, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38646400

RESUMO

Mental health disorders are among the top leading causes of disease burden worldwide and many patients have high levels of treatment resistance. Even though medications offer improvement to some patients, antidepressants are only effective in about half of those treated, and schizophrenia is treatment-refractory in about one-third of patients. One way to combat this disparity is to improve medication development and discovery for psychiatric disorders through evidence-based research. Recently, most psychiatric medications approved by the United States Food and Drug Administration (FDA) are for increased tolerability or extended release. Because of the slow, incremental progress, there is a pressing need to explore novel medications with new indications or mechanisms of action to treat the expanding population with mental disorders, especially in those who are fully or partially recalcitrant to first-line medication options. This review aims to present the newest FDA medications with new indications, establish the clinical need for each, and discuss future directions in drug development. We searched and reviewed novel psychiatric medications approved by the FDA from 2018 to 2022. We then analyzed each medication in the United States Clinical Trials Registry and gathered updated results for efficacy and safety information. We also searched PubMed/MEDLINE (Medical Literature Analysis and Retrieval System Online), Scopus, Web of Science, Elsevier, and Google Scholar to understand how these new indications met current clinical needs. Finally, we inquired about related technological implications that will lead the field of psychopharmacology now and in the years to come. We found 12 novel psychiatric medications approved by the FDA from 2018 to 2022, representing a very small percentage of the total FDA approvals during that period. These psychiatric medications with novel mechanisms or improved efficacy and safety  are expected to provide further options for treating mental health disorders; promising results will lead to new patterns of research.

3.
Cureus ; 16(1): e51608, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38313995

RESUMO

This comprehensive literature review addresses the scarcity and limited study of hypotension treatments compared to abundant antihypertensive drugs. Hypotension, categorized as absolute, relative, or orthostatic, has diverse causes. This review explores various treatments, including drugs affecting the sympathetic nervous system, such as midodrine, dihydroergotamine, and ergotamine, which have shown efficacy in managing hypotension. Dopamine agonists/antagonists and other drugs such as ephedrine, norepinephrine, and fludrocortisone are also discussed, each with distinct mechanisms and applications. Additionally, adjunctive agents such as non-steroidal anti-inflammatory agents, caffeine, and monoamine oxidase inhibitors are reviewed for their effects on blood pressure. This review underscores the importance of understanding the efficacy and safety profiles of hypotension treatments to guide healthcare professionals in optimal drug selection and management, emphasizing the need for further research and comparative studies for evidence-based guidelines.

4.
Cureus ; 15(1): e33939, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36819350

RESUMO

With the growing burden of metabolic disease, cardiovascular disease, and diabetes mellitus, there is an implication for new pharmacological intervention. Sodium-glucose cotransporter 2 inhibitors (SGLT2i) are a class of drugs that work on SGLT2 receptors in the kidneys to decrease glucose reabsorption. Lowering glucose levels mainly aids those with type 2 diabetes (T2DM), but they also have many other effects on the body. This article will investigate the impact of SGLT2i on six relevant organ systems; to establish current knowledge and potential benefits and risk for SGLTi in clinical practice. The medications that inhibit SGLT2 suffix with flozins are known to help decrease hypertension, acute cardiac failure, and bradycardia in the cardiovascular system. Flozins were found to aid with acute pulmonary edema, asthma, bronchitis, and chronic obstructive pulmonary disease (COPD) in the pulmonary system. SGLT2 is also found in the blood-brain barrier (BBB), and as such, SGLT2i can also affect the central nervous system (CNS). They reduced reactive oxygen species (ROS), BBB leakage, microglia burden, and acetylcholinesterase (AChE) levels. In the liver, this class of drugs can also assist with non-alcoholic fatty liver disease (NAFLD), hepatotoxicity, and weight loss. In the pancreas, SGLT2i has been shown to help with primarily diabetes and hyperglycemia. Finally, SGLT2i's are known to aid in decreasing nephrotoxicity and stopping the progression of the glomerular filtration rate (GFR) decrease. New studies have shown that the flozin drugs have been helpful for those who were receiving kidney transplants. Despite the positive effects, there are some concerns about SGLT2i and its notable adverse effects. Flozin drugs are known to cause urinary tract infections (UTIs), dehydration, orthostatic hypotension, postural dizziness, syncope, hypotension, hyperkalemia-induced cardiac arrest, and pancreatitis. This literature review will discuss, in detail, the benefits and risks that SGTL2i have on different organ systems and implicate the role they may play in clinical practice.

5.
Toxicol Mech Methods ; 22(2): 139-43, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22077921

RESUMO

The present study investigates the extrapyramidal effects of co-administration of enalapril (angiotensin-converting enzyme inhibitor) or losartan (angiotensin receptor blocker) with haloperidol in mice. Enalapril/losartan (as a suspension in 1% gum acacia) was administered by oral gavage and haloperidol was administered as an intraperitoneal injection to all the animals for seven days. Catalepsy was measured 30 min after the administration of haloperidol (1 mg/kg i.p.) on days 1 and 7. Observations on day 1 constituted the acute study (single dose administration) and observations on day 7, constituted the chronic study (repeated dose administration). Both acute and chronic administration of enalapril/losartan produced an increase in the duration of haloperidol induced catalepsy at the highest dose (20 mg/kg). Enalapril produced a more pronounced increase in the duration of catalepsy as compared to losartan on both acute and chronic administration. Results of our study suggest that co-administration of anti-psychotics and drugs affecting the angiotensin system can lead to an increase in motor side effects and therefore should be used with caution in patients with these co-morbid conditions.


Assuntos
Bloqueadores do Receptor Tipo 1 de Angiotensina II/efeitos adversos , Inibidores da Enzima Conversora de Angiotensina/efeitos adversos , Antipsicóticos/efeitos adversos , Enalapril/efeitos adversos , Tratos Extrapiramidais/efeitos dos fármacos , Haloperidol/efeitos adversos , Losartan/efeitos adversos , Animais , Catalepsia/induzido quimicamente , Masculino , Camundongos
6.
Cells ; 11(1)2021 12 30.
Artigo em Inglês | MEDLINE | ID: mdl-35011678

RESUMO

Glioblastoma (GB), an aggressive primary tumor of the central nervous system, represents about 60% of all adult primary brain tumors. It is notorious for its extremely low (~5%) 5-year survival rate which signals the unsatisfactory results of the standard protocol for GB therapy. This issue has become, over time, the impetus for the discipline of bringing novel therapeutics to the surface and challenging them so they can be improved. The cell-based approach in treating GB found its way to clinical trials thanks to a marvelous number of preclinical studies that probed various types of cells aiming to combat GB and increase the survival rate. In this review, we aimed to summarize and discuss the up-to-date preclinical studies that utilized stem cells or immune cells to treat GB. Likewise, we tried to summarize the most recent clinical trials using both cell categories to treat or prevent recurrence of GB in patients. As with any other therapeutics, cell-based therapy in GB is still hampered by many drawbacks. Therefore, we highlighted several novel techniques, such as the use of biomaterials, scaffolds, nanoparticles, or cells in the 3D context that may depict a promising future when combined with the cell-based approach.


Assuntos
Terapia Baseada em Transplante de Células e Tecidos/métodos , Glioblastoma/terapia , Animais , Glioblastoma/mortalidade , Humanos , Camundongos , Análise de Sobrevida
7.
J Assoc Physicians India ; 58: 674-7, 2010 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-21510460

RESUMO

OBJECTIVE: To identify metabolic syndrome (MetS) prevalence using International Diabetes Federation (IDF) 2005 guidelines in a semi urban south Indian (Boloor Diabetes Study) population of Mangalore. METHODS: Population of randomly selected adults > or =20 years living in Boloor locality who were available for the house to house survey were assessed for the following: anthropometric variables; blood pressure; fasting blood glucose and lipid profile. Among 800 responders; 300 men, 500 women, 551 were examined (68.8%). Fasting plasma glucose as well fasting lipid profile could be done for 451 (147 men, 304 women) 81.85%; Data was analysed for prevalence of MetS and its individual components. Diagnosis of MetS was based on IDF 2005 criteria for Asian men and women. Intergroup comparisons were performed using student 't' test and Chi-square test. RESULTS: MetS was prevalent in 134 of 451 (29.7%); men 39 (26.5%) and women 95 (31.2%). Prevalence of individual components of MetS were as follows: increased waist circumference, (common component) present in all; elevated TG in 38.8%; low HDL-C in 59.7%; increased FPG in 57.4%; elevated SBP in 80.5% and DBP in 56.7%; body mass index (BMI) > or =25 kg/sq.m (obesity) in 58.9% Barring increased waist circumference which is the essential criteria for diagnosis of Mets, Systolic hypertension emerged as the most frequent component in the population followed by low HDL-C and elevated FPG. Elevated TG was less prevalent in this population. CONCLUSION: Prevalence of MetS in this semi urban population (Boloor) of Mangalore compares with MetS prevalence identified in cross sectional studies in India. Prevention and treatment of the predictive factors: dyslipidemias, hyperglycaemia, hypertension, together with enhanced physical activity may together reduce the prevalence of MetS.


Assuntos
Diabetes Mellitus Tipo 2/epidemiologia , Hipertensão/epidemiologia , Síndrome Metabólica/epidemiologia , Obesidade/epidemiologia , Adulto , Fatores Etários , Idoso , Glicemia/metabolismo , Pressão Sanguínea/fisiologia , Composição Corporal , Índice de Massa Corporal , HDL-Colesterol/sangue , Estudos Transversais , Feminino , Guias como Assunto , Humanos , Hiperglicemia/epidemiologia , Índia/epidemiologia , Masculino , Síndrome Metabólica/sangue , Síndrome Metabólica/diagnóstico , Pessoa de Meia-Idade , Prevalência , Fatores Sexuais , Fatores Socioeconômicos , População Suburbana , Triglicerídeos/sangue , Circunferência da Cintura
8.
J Pharmacopuncture ; 22(3): 166-170, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31673447

RESUMO

OBJECTIVES: Attentional and memory functions are important aspects of neural plasticity that, theoretically, should be amenable to pharmacopuncture treatments. A previous study from our laboratory suggested that quantitative electroencephalographic (qEEG) measurements of theta/beta ratio (TBR), an index of attentional control, may be indicative of academic performance in a first-semester medical school course. The present study expands our prior report by extracting and analyzing data on frontal theta and beta asymmetries. We test the hypothesis that the amount of frontal theta and beta asymmetries (fTA, fBA), are correlated with TBR and academic performance, thereby providing novel targets for pharmacopuncture treatments to improve cognitive performance. METHODS: Ten healthy male volunteers were subjected to 5-10 min of qEEG measurements under eyes-closed conditions. The qEEG measurements were performed 3 days before each of first two block examinations in anatomy-physiology, separated by five weeks. Amplitudes of the theta and beta waveforms, expressed in µV, were used to compute TBR, fTA and fBA. Significance of changes in theta and beta EEG wave amplitude was assessed by ANOVA with post-hoc t-testing. Correlations between TBR, fTA, fBA and the raw examination scores were evaluated by Pearson's product-moment coefficients and linear regression analysis. RESULTS: fTA and fBA were found to be negatively correlated with TBR (P<0.03, P<0.05, respectively) and were positively correlated with the second examination score (P<0.03, P=0.1, respectively). CONCLUSION: Smaller fTA and fBA were associated with lower academic performance in the second of two first-semester medical school anatomy-physiology block examination. Future studies should determine whether these qEEG metrics are useful for monitoring changes associated with the brain's cognitive adaptations to academic challenges, for predicting academic performance and for targeting phamacopuncture treatments to improve cognitive performance.

9.
Indian J Pharmacol ; 49(6): 451-457, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29674800

RESUMO

OBJECTIVE: Despite the guideline-directed therapy, complete absence of nausea was noted only in 33% of breast cancer patients on anthracycline-cyclophosphamide regimen. Hence, we sought to compare the efficacy of aprepitant (APT) versus olanzapine (OLP) in preventing chemotherapy-induced nausea and vomiting (CINV) in breast cancer patients on doxorubicin-cyclophosphamide regimen. PATIENTS AND METHODS: A prospective, open-label, nonrandomized study was conducted at the Department of Oncology. Eighty-three patients completed the study with 43 in the APT group and 40 in OLP group. Data about nausea and vomiting were collected using Multinational Association of Supportive Care in Cancer Antiemesis Tool (MAT). The severity of nausea and vomiting was assessed by the MAT and Common Terminology Criteria for Adverse Events (CTCAE) version 4.03, respectively. RESULTS: Complete response (no emesis and no rescue medication) was achieved in 81% of the patients in APT group and 85% in the OLP group in the acute period (P = 0.661); 74% of patients in APT group and 85% in OLP group had no nausea during the same period (P = 0.233). Among the OLP patients who had nausea, 67% had moderately severe and 33% had Severe grade, and in the APT group, severity was equally distributed in mild, moderate, and severe grades. Among the patients who had vomiting, severe (CTCAE) vomiting was noticed in 81% of patients who were treated with APT compared to 50% in OLP group. CONCLUSION: OLP was found to be an equally effective alternative to APT in the antiemetic prophylaxis of CINV in breast cancer patients receiving chemotherapy with doxorubicin-cyclophosphamide regimen.


Assuntos
Antieméticos/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Benzodiazepinas/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Morfolinas/uso terapêutico , Náusea/prevenção & controle , Vômito/prevenção & controle , Antieméticos/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Aprepitanto , Benzodiazepinas/administração & dosagem , Ciclofosfamida/efeitos adversos , Ciclofosfamida/uso terapêutico , Doxorrubicina/efeitos adversos , Doxorrubicina/uso terapêutico , Feminino , Humanos , Pessoa de Meia-Idade , Morfolinas/administração & dosagem , Olanzapina , Estudos Prospectivos
10.
J Pharmacopuncture ; 20(1): 23-28, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28392959

RESUMO

OBJECTIVES: Exercise with partially restricted blood flow is a low-load, low-intensity resistance training regimen which may have the potential to increase muscle strength in the obese, elderly and frail who are unable to do high-load training. Restricted blood flow exercise has also been shown to affect blood vessel function variably and can, therefore, contribute to blood vessel dysfunction. This pilot study tests the hypothesis that unilateral resistance training of the leg extensors with partially restricted blood flow increases muscle strength and decreases vascular autoregulation. METHODS: The subjects were nine normotensive, overweight, young adult African-Americans with low cardiorespiratory fitness who underwent unilateral training of the quadriceps' femoris muscles with partially restricted blood flow at 30% of the 1-repetition maximum (1-RM) load for 3 weeks. The 1-RM load and post-occlusion blood flow to the lower leg (calf) were measured during reactive hyperemia. RESULTS: The 1-RM load increased in the trained legs from 77 ± 3 to 84 ± 4 kg (P < 0.05) in the absence of a significant effect on the 1-RM load in the contralateral untrained legs (P > 0.1). Post-occlusion blood flow decreased significantly in the trained legs from 19 ± 2 to 13 ± 2 mL· min-1· dL-1 (P < 0.05) and marginally in the contralateral untrained legs from 18 ± 2 to 16 ± 1 mL· min-1· dL-1 (P = 0.09). Changes in post-occlusion blood flow to the skin overlying the trained and the contralateral untrained muscles were not significant. CONCLUSION: These results demonstrate that restricted blood flow exercise, which results in significant gains in muscle strength, may produce decrements in endothelial dysfunction and vascular autoregulation. Future studies should determine whether pharmacopuncture plays a role in treatments for such blood vessel dysfunction.

11.
J Clin Diagn Res ; 10(9): LD01-LD02, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27790475

RESUMO

Patients with umbilical disorders who present with complaints of a mass, pain, tenderness or discharge will typically have a differential diagnosis including umbilical hernias, pyogenic granuloma, endometriosis, Sister Mary Joseph nodule and urachal or epidermoid cysts. We would add the inclusion of pilonidal sinus disease and present the case of a patient with an umbilical pilonidal cyst. The use of a cryocone with lubricating jelly, in this case, proved to be an easy and convenient method that aided in visualization and diagnosis of this fairly uncommon condition.

12.
J Clin Diagn Res ; 10(11): CF01-CF05, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28050361

RESUMO

INTRODUCTION: An aerobic exercise (Ex) augments neurogenesis and may ameliorate learning and memory deficits in the rat Kainic Acid (KA) model of temporal lobe epilepsy in the short-term but whether it reverses learning and memory deficits after a substantial period of delay remains unclear. AIM: This study tests the hypothesis that aerobic Ex attenuates the learning and memory deficits associated with kainate seizures in the long-term. MATERIALS AND METHODS: A total of 60 rats were subjected to chemical lesioning using KA and to an Ex intervention consisting of a 30 days period of daily swimming for 15 min, immediately after KA lesioning (immediate exposure) or after a 60 days period of normal activity (delayed exposure). We evaluated spatial learning on a T-maze test, expressed as percentage of correct responses. We evaluated memory on a passive-avoidance test, expressed as time spent in a compartment in which the rats were previously exposed to an aversive stimulus. RESULTS: Ex increases the percentage of correct responses, percentage bias, and number of alternations, associated with the T-maze testing for the normal control, sham-operated control and kainate-lesioned animals after both immediate and delayed exposures to Ex. Ex decreased the time exposed to the aversive stimulus in the smaller compartment of the two-compartment passive-avoidance test, also for the normal control, sham-operated control and kainate-lesioned animals after both immediate and delayed exposures to Ex. CONCLUSION: These findings suggest that, after temporal lobe epileptic seizures in rats, swimming exercise may attenuate the learning and memory deficits, even if the exercise treatment is delayed.

13.
J Clin Diagn Res ; 10(8): CC01-6, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-27656434

RESUMO

INTRODUCTION: Obesity and cardiovascular disease are inextricably linked and the health community's response to the current epidemic of adolescent obesity may be improved by the ability to target adolescents at highest risk for developing cardiovascular disease in the future. Overweight manifests early as autonomic dysregulation and current methods do not permit differentiation of overweight adolescents or young adults at highest risk for developing cardiovascular disease. AIM: This study was designed to test the hypothesis that scaling exponents motivated by nonlinear fractal analyses of Heart Rate Variability (HRV) differentiate overweight, otherwise healthy adolescent/young adult subjects at risk for developing prehypertension, the primary forerunner of cardiovascular disease. MATERIALS AND METHODS: The subjects were 18-20year old males with Body Mass Index (BMI) 20.1-42.5kg/m(2). Electrocardiographic inter-beat (RR) intervals were measured during 3h periods of bed rest after overnight fasting and ingestion of 900Cal high-carbohydrate and high-fat test beverages on separate days. Detrended Fluctuation Analysis (DFA), k-means cluster and ANOVA analyses of scaling coefficients α, α(1), and α(2), showed dependencies on hourly measurements of systolic blood pressure and on premeasured BMI. RESULTS: It was observed that α value increased during the caloric challenge, appears to represent metabolically-induced changes in HRV across the participants. An ancillary analysis was performed to determine the dependency on BMI without BMI as a parameter. Cluster analysis of the high-carbohydrate test beverage treatment and the high-fat treatment produced grouping with very little overlap. ANOVA on both clusters demonstrated significance at p<0.001. We were able to demonstrate increased sympathetic modulation of our study group during ingestion and metabolism of isocaloric high-carbohydrate and high-fat test beverages. CONCLUSION: These findings demonstrate significantly different clustering of α, α1, and α2 and Systolic Blood Pressure (SBP) with respect to normal, overweight and obese BMI.

14.
J Pharmacopuncture ; 19(3): 207-212, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27695629

RESUMO

OBJECTIVES: Acupuncture treatments are safe and effective for a wide variety of diseases involving autonomic dysregulation. Heart rate variability (HRV) is a noninvasive method for assessing sympathovagal balance. The low frequency/high frequency (LF/HF) spectral power ratio is an index of sympathovagal influence on heart rate and of cardiovascular health. This study tests the hypothesis that from rest to 30% to 50% of peak oxygen consumption, the nonlinear Conte-Zbilut-Federici (CZF) method of computing the LF/HF ratio is a more reliable index of changes in the HRV than linear methods are. METHODS: The subjects of this study were 10 healthy young adults. Electrocardiogram RR intervals were measured during 6-minute periods of rest and aerobic exercise on a cycle ergometer at 30% and 50% of peak oxygen consumption (VO2peak). RESULTS: The frequency domain CZF computations of the LF/HF ratio and the time domain computations of the standard deviation of normal-to-normal intervals (SDNN) decreased sequentially from rest to 30% VO2peak (P < 0.001) to 50% VO2peak (P < 0.05). The SDNN and the CZF computations of the LF/HF ratio were positively correlated (Pearson's r = 0.75, P < 0.001). fast Fourier transform (FFT), autoregressive (AR) and Lomb periodogram computations of the LF/HF ratio increased only from rest to 50% VO2peak. CONCLUSION: Computations of the LF/HF ratio by using the nonlinear CZF method appear to be more sensitive to changes in physical activity than computations of the LF/HF ratio by using linear methods. Future studies should determine whether the CZF computation of the LF/HF ratio improves evaluations of pharmacopuncture and other treatment modalities.

15.
J Clin Diagn Res ; 10(7): CC01-5, 2016 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27630836

RESUMO

INTRODUCTION: Beetroot Juice (BJ) contains dietary nitrates that increase the blood Nitric Oxide (NO) level, decrease Blood Pressure (BP), increase athletic performance and improve cognitive functions but the mechanism remains unclear. Ultrasonographic measurement of middle cerebral artery blood flow velocity with computation of Cerebral Augmentation Index (CAIx) is a measure of the reflected flow signal, modulated by changes in cerebrovascular resistance and compliance. AIM: This pilot study tests the hypothesis that ingestion of an amount of BJ sufficient to raise the blood NO level two-to three-fold, decreases Transcranial Doppler (TCD) measured CAIx. MATERIALS AND METHODS: Ten healthy young-adult African-American women were studied at two levels of submaximal exercise, 40% and 80% of their predetermined peak oxygen consumptions. The subjects ingested nitrate-free orange juice (OJ, control) and an isocaloric BJ beverage (1.5 mg/mL nitrate, 220 Cal), on different days, 1-2 weeks apart. RESULTS: The BJ treatment increased blood NO and decreased systolic BP at rest and at the two levels of exercise. The BJ treatment decreased CAIx only at the two levels of exercise (from 79 ± 2% to 62 ± 2% and from 80 ± 2% to 60 ± 3%, p<0.05). Exercise increased TCD-measured resistance and pulsatility indices (RIx, PIx) without changing AIx. The BJ treatment had no effect on RIx and PIx. CONCLUSION: These findings suggest that decreased CAIx associated with aerobic exercise reflects the change in cerebral haemodynamics resulting from dietary nitrate supplementation. Future studies should determine whether the BJ-induced decrement in CAIx is correlated with an improvement in brain function.

16.
N Am J Med Sci ; 8(6): 243-9, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27500128

RESUMO

BACKGROUND: Hypertensive individuals are known to exhibit greater increases in blood pressure during an isometric handgrip exercise (IHE) than their normotensive counterparts. AIM: This study tests the hypothesis that, compared to normotensive individuals, prehypertensive individuals exhibit an exaggerated response to IHE. MATERIALS AND METHODS: In this study, the effects of IHE were compared in matched prehypertensive vs. normotensive healthy African-American females. Six healthy young adult African-American female university students were screened in a physician's office for blood pressure in the range of prehypertension, systolic blood pressure (SBP) 120-139 mmHg and diastolic blood pressure (DBP) 80-89 mmHg. Six young adult African-American women were also recruited to serve as a healthy normotensive control group with SBP ≤119 mmHg and DBP ≤79 mmHg. Cardiovascular fitness was determined by peak oxygen uptake (VO2 peak) measured during a progressive exercise test. RESULTS: During the handgrip exercise, the prehypertensive group exhibited greater increases in SBP (from 139 ± 6 to 205 ± 11 mmHg, +48%) than the controls (from 132 ± 3 to 145 ± 3 mmHg, +10%); intergroup difference P < 0.001. The prehypertensive group also exhibited greater increases in DBP (from 77 ± 2 to 112 ± 5 mmHg, +46%) compared to the controls (from 72 ± 3 to 78 ± 4 mmHg, +8%); intergroup difference P < 0.001. The increase in systemic vascular resistance was also greater in the prehypertensive group (from 1713 ± 91 to 2807 ± 370 dyne.s.cm(-5), +64%) than in the controls (from 1668 ± 80 to 1812 ± 169 dyne.s.cm(-5), +9%); intergroup difference P < 0.05. CONCLUSION: These results suggest that blood pressure measurements performed during IHE may be a useful screening tool in evaluating prehypertensive individuals for antihypertensive treatments.

17.
J Clin Diagn Res ; 9(11): IC01-IC04, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26674015

RESUMO

INTRODUCTION: Hypertension is a major public health problem in India and worldwide. Since hypertension is often asymptomatic, it commonly remains undetected, leading to serious complications if untreated. Hypertension is one of the leading causes of end stage renal disease. It doubles the risk of developing coronary artery disease, increases the risk of congestive heart failure by four folds and that of cerebrovascular disease and stroke by seven folds. Hypertension is directly responsible for 57% of all stroke deaths and 42% of coronary heart disease deaths in India. AIM: To identify prevalence and risk factors for hypertension in a semi urban population of Mangalore, who participated in Boloor Diabetes Study (BDS-II). MATERIALS AND METHODS: This cross-sectional study was conducted on 551 subjects aged ≥ 20 years who were randomly selected. Hypertension was diagnosed and classified according to Joint National Committee 7 (JNC) criteria. Blood pressure was measured by a doctor using calibrated sphygmomanometer. Anthropometric measurements, lipid and glucose estimations were done for all subjects. Statistical analysis was done using Chi-square test and student's t-test (unpaired). Multivariate logistic regression analysis was done using hypertension as dependent variable and the various risk factors as independent variables. RESULTS: Overall prevalence of hypertension in the community was 41% (227/551) (40.9% in men, 41.3% in women). Prehypertension was found in 40% (223/551) (45.4% in men, 38.1% in women), and only 18.3% (101/551) had normal blood pressure. Stage I hypertension was seen in 29.7% (164/551) (28.9% in men, 30.1% in women). Stage II hypertension was seen in 11.4% (63/551) (12% in men, 11% in women). Age, obesity, diabetes, serum cholesterol and serum triglycerides were strongly associated with hypertension. Only 46% (254/551) of the hypertensive subjects were aware that they were hypertensive. CONCLUSION: Prevalence of hypertension was high in this population. Nearly 54% were unaware of their hypertensive status. Prevalence increased with age, obesity, diabetic status and dyslipidemia. Nearly half of subjects were prehypertensives. This study highlights the need for regular screening coupled with educational programmes to detect, improve awareness and optimally treat hypertension in the community to reduce cardiovascular and renal complications.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA