Related Experiment Video
Updated: Jul 16, 2026
09:46
Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
Published on: May 19, 2019
Formaldehyde cycle and the natural formaldehyde generators and capturers
E Tyihák1, L Albert, Z I Németh
1Plant Protection Institute, Hungarian Academy of Sciences, Budapest.
Acta Biologica Hungarica
|October 20, 1999
Summary
S-adenosyl-L-methionine metabolism generates formaldehyde, potentially disrupting biological systems. Trans-resveratrol captures this formaldehyde, offering cardioprotective and chemopreventive benefits by normalizing the formaldehyde cycle.
Area of Science:
- Biochemistry
- Molecular Biology
- Cellular Metabolism
Background:
- S-adenosyl-L-methionine is a key methyl donor in enzymatic transmethylation, including DNA methylation.
- Enzymatic transmethylation reactions may involve formaldehyde formation from S-adenosyl-L-methionine.
- A biological formaldehyde cycle exists, linking methionine synthesis and formaldehyde production from S-adenosyl-L-methionine during transmethylation.
Purpose of the Study:
- To investigate the formation of formaldehyde during enzymatic transmethylation reactions.
- To explore the role of trans-resveratrol as a formaldehyde scavenger.
- To evaluate the potential health benefits of normalizing the formaldehyde cycle.
Main Methods:
- Demonstration of formaldehyde formation from the methyl group of S-adenosyl-L-methionine.
- Observation of trans-resveratrol's concentration-dependent formaldehyde capture capabilities.
- Assessment of resveratrol-formaldehyde reaction products for biological effects.
Main Results:
- Formaldehyde is formed from S-adenosyl-L-methionine during transmethylation.
- Trans-resveratrol acts as a natural formaldehyde scavenger.
- Elimination of formaldehyde by resveratrol may yield cardioprotective effects.
- Resveratrol-formaldehyde adducts show potential chemopreventive activity against cancer.
Conclusions:
- Abnormalities in the formaldehyde cycle, due to uncontrolled formaldehyde production, are implicated in disease pathogenesis.
- Trans-resveratrol can normalize abnormal formaldehyde levels.
- Resveratrol offers a dual benefit: cardioprotection via formaldehyde elimination and cancer chemoprevention through its reaction products.
Related Concept Videos
01:23Urea Cycle
The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.
01:49The Nitrogen Cycle
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
01:37The Citric Acid Cycle: Overview
In aerobic organisms, the citric acid cycle is the second stage of cellular respiration wherein molecules derived from the breakdown of carbohydrates, proteins, and fats are oxidized into carbon dioxide and energy. This process is also known as the tricarboxylic acid (TCA) cycle as the first product of the cycle, citric acid, contains three carboxyl groups in its structure. Alternatively, this cycle is also referred to as the Krebs cycle, in honor of its discoverer Sir Hans Krebs.
The citric...
The citric...
01:26Respiration Pathways
Cellular respiration is a fundamental metabolic process that enables organisms to generate energy from organic molecules. One of its central pathways is the tricarboxylic acid (TCA) cycle, also known as the Krebs cycle, which plays a crucial role in energy production and biosynthetic processes.Conversion of Pyruvate to Acetyl-CoAThe pyruvate generated from glycolysis undergoes oxidative decarboxylation by the pyruvate dehydrogenase complex, producing acetyl-CoA, one molecule of NADH, and one...
01:28Carbon-dioxide Fixation
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
01:24Microbes and the Carbon Cycle
The carbon cycle is a fundamental Earth process involving the transfer of carbon among the biosphere, lithosphere, atmosphere, and hydrosphere. It plays a critical role in regulating the planet’s climate and supporting life by cycling carbon through various chemical forms and reservoirs. Carbon primarily circulates as carbon dioxide (CO₂), representing its oxidized form, while reduced forms such as methane (CH₄) and organic compounds also play essential roles.Microbial activity is central to...