Related Experiment Video
Updated: Jul 30, 2026
09:43
Measurement of Heme Synthesis Levels in Mammalian Cells
Published on: July 9, 2015
Hormones and homocysteine
1Department of Medicine, Section of Endocrinology, Tulane University School of Medicine, New Orleans, LA, USA.
Minerva Endocrinologica
|July 2, 2002
Summary
High homocysteine levels (hyperhomocysteinemia) are a risk factor for cardiovascular disease (CVD). Hormonal factors and endocrine disorders like diabetes influence these levels, impacting CVD risk.
Area of Science:
- Endocrinology
- Cardiovascular Medicine
- Metabolic Disorders
Background:
- Hyperhomocysteinemia is a known risk factor for cardiovascular disease (CVD).
- Plasma homocysteine concentrations are influenced by genetic, nutritional, hormonal, and lifestyle factors.
- Hormonal modulation of homocysteine metabolism is implicated in CVD pathogenesis, though mechanisms are not fully understood.
Purpose of the Study:
- To review homocysteine metabolism and its hormonal determinants.
- To discuss the role of hyperhomocysteinemia in diabetes mellitus and other endocrine disorders.
- To explore the complex association between hyperhomocysteinemia and cardiovascular risk in specific patient populations.
Main Methods:
- Literature review of studies on homocysteine metabolism.
- Analysis of hormonal influences on homocysteine levels.
- Examination of the relationship between hyperhomocysteinemia, endocrine disorders, and cardiovascular disease.
Main Results:
- Various factors, including hormones, influence homocysteine metabolism and CVD risk.
- The link between hyperhomocysteinemia and diabetes mellitus is complex and contributes to unexplained CVD risk in diabetics.
- Insulin's role in homocysteine metabolism is debated, despite its effect on relevant enzymes.
Conclusions:
- Hormonal factors significantly modulate homocysteine metabolism and may contribute to cardiovascular disease development.
- Understanding the interplay between hyperhomocysteinemia, endocrine disorders, and CVD is crucial for risk assessment and management.
- Further research is needed on the impact of homocysteine-lowering interventions on cardiovascular outcomes.
Related Concept Videos
01:19Regulation of Metabolism
Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
01:22Target Cell Response to Hormones
Hormones intricately bind to receptors on the surface or within target cells, initiating a cascade of cellular responses.
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...
01:29Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu
Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
01:27Major Hormones and Their Functions
Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.
01:19Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
01:20Sulfur Assimilation
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...