Publications by authors named "Leonardo A M Zornoff"

Cardiotoxicity is the serious side effect of doxorubicin treatment. Ceramides are formed from the degradation of sphingolipids in cell membranes and play an important role in signaling and modulating biological processes. There is evidence that omega-3 fatty acid administration can act on this pathway.

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Background: Doxorubicin (DOX) is a highly effective chemotherapy drug widely used to treat cancer, but its use is limited due to multisystemic toxicity. Lipid metabolism is also affected by doxorubicin. Orange juice can reduce dyslipidemia in other clinical situations and has already been shown to attenuate cardiotoxicity.

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Doxorubicin is an effective drug for cancer treatment; however, cardiotoxicity limits its use. Cardiotoxicity pathophysiology is multifactorial. GLP-1 analogues have been shown to reduce oxidative stress and inflammation.

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Unlabelled: Cardiovascular disease is a leading cause of death worldwide. Heart failure is a cardiovascular disease with high prevalence, morbidity, and mortality. Several natural compounds have been studied for attenuating pathological cardiac remodeling.

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Introduction: Exercise is an important therapeutic strategy for preventing and treating myocardial infarction (MI)-induced cardiac remodeling and heart failure. However, the myocardial effects of resistance exercise on infarcted hearts are not completely established. In this study, we investigated the effects of resistance exercise on structural, functional, and molecular cardiac alterations in infarcted rats.

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Cardiovascular diseases (CVD) are the major cause of global mortality, accounting for 31% of deaths worldwide. Healthy eating habits based on the consumption of bioactive molecules present in plant-based diets can contribute to the prevention of CVD. In this context, the consumption of common beans (Phaseolus vulgaris L.

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Background: Stroke is a leading cause of mortality and disability, and its sequelae are associated with inadequate food intake which can lead to sarcopenia. The aim of this study is to verify the effectiveness of creatine supplementation on functional capacity, strength, and changes in muscle mass during hospitalization for stroke compared to usual care. An exploratory subanalysis will be performed to assess the inflammatory profiles of all participants, in addition to a follow-up 90 days after stroke, to verify functional capacity, muscle strength, mortality, and quality of life.

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Unlabelled: Although current guidelines recommend resistance exercise in combination with aerobic training to increase muscle strength and prevent skeletal muscle loss during cardiac remodeling, its effects are not clear. In this study, we evaluated the effects of resistance training on cardiac remodeling and the soleus muscle in long-term myocardial infarction (MI) rats.

Methods: Three months after MI induction, male Wistar rats were assigned to Sham ( = 14), MI ( = 9), and resistance exercised MI (R-MI, = 13) groups.

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Background: To assess the prevalence of frailty by the Clinical Frailty Scale (CFS) and the 5-item FRAIL scale and their association with hospitalization in hemodialysis (HD) patients.

Methods: This was a prospective observational study. We included patients of both genders ≥ 18 years old in HD treatment for at least 3 months.

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Background: Frailty and ST-Elevation Myocardial Infarction (STEMI) share similar molecular pathways. Specific biomarkers, such as microRNAs (miRNAs), may provide insights into the molecular mechanisms that cause the relationship between frailty and STEMI.

Objective: Our aim was to identify and compare circulating miRNA levels between frail and non-frail older adults following STEMI and comprehend the regulatory miRNA-gene networks and pathways involved in this condition.

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The objective of this study was to assess whether acute green tea (GT) supplementation attenuates inflammatory and oxidative stress biomarkers induced by high-fat, high-saturated (HFHS) meals in obese women, and to assess its ability to modulate circulating microRNA (miRNA) expression. This was a randomized, double-blind, crossover study. The study included obese women over 18 years old who had no comorbidities.

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Article Synopsis
  • The study aims to assess how doxycycline can reduce chronic heart damage caused by doxorubicin in rats, focusing on its anti-inflammatory properties and ability to inhibit matrix metalloproteinases (MMPs).
  • Male Wistar rats were divided into four groups, with some receiving doxorubicin and others receiving doxycycline alongside it, while various heart-related metrics were evaluated.
  • The results showed that doxycycline improved heart structure and function affected by doxorubicin, as it reduced heart enlargement, cardiomyocyte hypertrophy, and restored some metabolic enzyme activity, indicating a potential protective role against cardiotoxicity.
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Myocardial infarction has a high mortality rate worldwide. Therefore, clinical intervention in cardiac remodeling after myocardial infarction is essential. Açai pulp is a natural product and has been considered a functional food because of its antioxidant/anti-inflammatory properties.

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Calcium is the most abundant extracellular cation in the body, and it is responsible for structural and enzymatic functions. Calcium homeostasis is regulated by 3 factors: calcitonin, vitamin D, and parathyroid hormone (PTH). Hypercalcemia is defined by a serum calcium concentration >10.

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The cardiac remodeling after myocardial infarction is characterized by inflammation and oxidative stress. Thus, this study aimed to test the hypothesis that jaboticaba, due to its anti-inflammatory and antioxidants properties, attenuates cardiac remodeling after myocardial infarction. Wistar rats were submitted to myocardial infarction due to coronary artery occlusion, and divided into four experimental groups: C, sham control animals; I, animals submitted to myocardial infarction, received a standard diet; IJ2, animals submitted to myocardial infarction, received a standard diet plus 2% jaboticaba; and IJ4, animals submitted to myocardial infarction, received a standard diet plus 4% jaboticaba.

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Septic shock is associated with unacceptably high mortality rates, mainly in developing countries. New adjunctive therapies have been explored to reduce global mortality related to sepsis. Considering that metabolic changes, mitochondrial dysfunction and increased oxidative stress are specific disorders within the path of septic shock, several micronutrients that could act in cellular homeostasis have been studied in recent decades.

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Background: Mechanisms involved in cardiac remodelling by aortic regurgitation (AR) and the moment when cardiac dysfunction begins are largely unknown. This study aimed to investigate cardiac morphology and function after 1, 4, 8, and 12 weeks of experimental AR in Wistar rats. Extracellular matrix was also investigated as the potential mechanism that underlies the AR remodelling process.

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Tobacco smoke is associated with oxidative and inflammatory pathways, increasing the risk of chronic-degenerative diseases. Our goal was to evaluate the effects of acute "Pera" and "Moro" orange juice consumption on inflammatory processes and oxidative stress in microRNA (miRNA) expression in plasma from healthy smokers. This was a randomized crossover study that included healthy smokers over 18 years old.

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Article Synopsis
  • - The study aimed to assess the link between frailty (using the Clinical Frailty Scale and FRAIL scale) and C-terminal agrin fragment levels with 3-month mortality in patients who experienced a ST-segment elevation myocardial infarction (STEMI).
  • - It included 111 patients averaging 62.3 years old, where 11.7% died within 3 months post-discharge; frailty assessments revealed most were not frail based on CFS and FRAIL scale classifications.
  • - The results indicated that higher frailty (as per CFS) and lower CAF levels were significantly associated with increased 3-month mortality, particularly in patients aged 65 and older.
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Aim: This study aimed to evaluate the association between serum myostatin levels, hospital mortality, and muscle mass and strength following ST-segment elevation myocardial infarction (STEMI).

Methods: This was a prospective observational study. Within 48 hours of admission, bioelectrical impedance and handgrip strength were assessed and blood samples collected for myostatin evaluation.

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Patients with chronic kidney disease (CKD) have a higher risk of death than the general population, the main cause being cardiovascular disease (CVD). Nutrition plays a key role in the prevention and treatment of CVD and kidney diseases. Currently, new evidence reinforces the importance of specific foods and general dietary patterns rather than isolated nutrients for cardiovascular risk.

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