Research into sterilized soil has revealed that lifeless dirt can continue to exhibit biochemical activity for years. Despite being treated with gamma radiation to eliminate all microbes, the samples continued to consume oxygen and release carbon dioxide for over six years. These findings suggest that metabolic-like processes may be natural features of geology rather than phenomena exclusive to living cells. The study supports theories that chemical reactions resembling metabolism could have existed on Earth before the emergence of life.
* Sterilized soil maintained respiratory activity for multiple years without organic life
* Observed chemical patterns resemble components of the Krebs cycle
* Mineral catalysts like iron and aluminum oxides may facilitate these nonbiological reactions
* The findings offer a new perspective on how metabolism might have preceded biological evolution
* Sterilized soil maintained respiratory activity for multiple years without organic life
* Observed chemical patterns resemble components of the Krebs cycle
* Mineral catalysts like iron and aluminum oxides may facilitate these nonbiological reactions
* The findings offer a new perspective on how metabolism might have preceded biological evolution
While both glucose and fructose are six-carbon sugars found in common sweeteners, fructose acts as a unique metabolic signal that drives fat accumulation, metabolic syndrome, and potentially cancer and dementia.
* Glucose: Stimulates insulin secretion; linked to obesity.
* Fructose: Promotes triglyceride synthesis and fat accumulation via "metabolic plenty" signaling.
* Health Risks: Chronic excess fructose is linked to metabolic syndrome, cancer, and dementia.
* Review Scope: Examines biochemical/physiological differences between the two sugars and the endogenous pathway that converts glucose to fructose.
* Glucose: Stimulates insulin secretion; linked to obesity.
* Fructose: Promotes triglyceride synthesis and fat accumulation via "metabolic plenty" signaling.
* Health Risks: Chronic excess fructose is linked to metabolic syndrome, cancer, and dementia.
* Review Scope: Examines biochemical/physiological differences between the two sugars and the endogenous pathway that converts glucose to fructose.
Scientists have discovered a single-celled organism with a fantastically small genome, lacking genes for core metabolic functions, challenging our understanding of what constitutes life.
Researchers at Michigan State University have uncovered a surprising mechanism that plants use to regulate their growth — one that directly ties their development to how they perceive light. They found a metabolic compound, naringenin chalcone, can 'reprogram' a UV light sensor, potentially leading to more resilient crops.
Genetic studies of human metabolism have been limited in scale and allelic breadth. Here we provide a data-driven map of the genetic regulation of circulating small molecules and lipoprotein characteristics (249 traits) measured using proton nuclear magnetic resonance spectroscopy across the allele frequency spectrum in ~450,000 individuals.
