Tag

Cell Biology

All articles tagged with #cell biology

science11 days ago•12 min saved

Aging as a Program: Remodeling the Cell Society Across Life

A study analyzing 21 million mouse cells across five ages argues aging is a staged, programmed remodeling of the body's cell populations, not random molecular decay. Specific cell types rise or fall in defined windows—early loss of fat, muscle, and some brain progenitors; midlife depletion of tissue-support cells and immune components; later expansion of aging-associated immune cells—with genomic regions opening or closing in a coordinated pattern. These signals hint at upstream programs driving aging, echoed by midlife protein changes in humans. The work suggests aging begins before age 30 and that slowing it may require early interventions targeting vulnerable cell types and their signaling pathways.

via Quanta Magazine|

#aging #cell-biology #developmental-biology

science2 months ago•2 min saved

Severed Sea Cucumber Tissues Survive for Years, Redefining Cellular Immortality

Researchers found that severed tissues from the sea cucumber Psolus fabricii can survive, heal, and absorb nutrients in untreated seawater for more than three years without reproducing, suggesting a form of tissue immortality and offering insights into regeneration with potential medical implications.

via Gizmodo|

#cell-biology #immortality #marine-biology

science2 months ago•4 min saved

Stanford unveils 120-nm, label-free microscope for real-time live-cell imaging

Stanford researchers developed Interferometric Image Scanning Microscopy (iISM), a label-free instrument that reaches ~120-nanometer resolution inside living cells by merging interferometric scattering with array-based detection, enabling real-time observation of cellular structures with less light and no fluorescent labels. It complements fluorescence microscopy and opens new avenues for studying pathogen interactions, drug entry, and malaria-related cell changes, with plans to broaden access and collaborations.

via SciTechDaily|

#cell-biology #interferometric-scattering #label-free-imaging

science3 months ago•3 min saved

Mitochondrial Pearling Evenly Spreads mtDNA to Stabilize Cells

Researchers reveal a process called mitochondrial pearling, where mitochondria transiently form bead-like constrictions to split and redistribute mitochondrial DNA nucleoids along their length, maintaining even spacing. This calcium-triggered, membrane-supported mechanism helps preserve mtDNA organization and could shed light on metabolic and neurodegenerative diseases, with findings published in Science.

via SciTechDaily|

#cell-biology #mitochondria #mitochondrial-dna

health3 months ago•21 min saved

Thymus Revealed as Key Regulator of Aging and Cancer Risk

A growing body of research shows the thymus—an immune organ behind the breastbone—plays a central role in immune development, aging, and cancer risk, prompting efforts to rejuvenate thymic function to promote longevity and disease prevention.

via The Washington Post|

#aging #biology #cancer

science5 months ago•5 min saved

Digital birth of a bacterial cell: a full-scale virtual division

Researchers built a three‑dimensional computer model that simulates nearly every chemical reaction in a minimal bacterial cell (JCVI‑Syn3a), producing a virtual cell that copies its DNA and divides in about 105 minutes. The full simulation ran for six days on a supercomputer and required simplifying assumptions, but it demonstrated coherent, life‑like cellular processes across the cell cycle.

via Nature|

#cell-biology #cell-division #computational-biology

science6 months ago•5 min saved

Aging in Worms Triggers ER Remodeling That May Influence Longevity

Researchers studying aging in Caenorhabditis elegans found that aging promotes remodeling of the endoplasmic reticulum via ER-phagy, with rough ER declining while smooth ER changes are modest; this reorganization may affect protein homeostasis and aging, and could point to new drug targets for age-related diseases.

via ScienceAlert|

#aging #caenorhabditis-elegans #cell-biology

science6 months ago•1 min saved

Transitional Microbes Point the Way to Complex Cell Origins

A wave of new studies identifies rare transitional microbes, such as Lokiarchaeum ossiferum, that bridge simple cells and complex eukaryotic cells, offering clues to how cells with nuclei and mitochondria evolved about two billion years ago.

via The New York Times|

#cell-biology #endosymbiosis #eukaryogenesis

science6 months ago•6 min saved

Expansion Microscopy Turns Tiny Cells Into Big Clues

Expansion microscopy uses a diaper-inspired hydrogel to physically swell biological samples, enabling higher-resolution visualization of tiny cellular structures with standard microscopes. By improving dye penetration and preserving overall architecture, it democratizes microscopy and reveals detailed cytoskeletal diversity across species.

via Quanta Magazine|

#cell-biology #cytoskeleton #expansion-microscopy

biology7 months ago•6 min saved

TimeVaults give cells a memory of their gene activity

Researchers rewired vault proteins to create TimeVaults that capture and store messenger RNA produced by human cells over a 24-hour window, keeping a record for at least a week. The system acts as an unbiased cellular memoir of transcription, activated by a drug cue and reversible, and could shed light on cancer drug resistance and stem-cell biology without noticeably affecting cell behavior.

via Nature|

#biology #cell-biology #rna

health8 months ago•6 min saved

Mitochondria Connect Stress, Brain Function, and Mental Health

A scientific review suggests that mitochondria, the energy-producing structures in cells, play a key role in translating psychological stress and loneliness into physical health outcomes, with chronic stress impairing mitochondrial function and contributing to diseases like depression and cardiovascular issues. The review highlights the importance of mitochondrial health in resilience and potential interventions such as exercise to improve cellular and mental well-being.

via PsyPost|

#cell-biology #health #loneliness

science9 months ago•3 min saved

Essential Nutrient Boosts Cellular Energy

Scientists discovered that the amino acid leucine enhances cellular energy by protecting mitochondrial proteins from degradation, thereby improving mitochondrial efficiency and energy production, with implications for health and disease treatments.

via SciTechDaily|

#cell-biology #energy-production #leucine

science10 months ago•3 min saved

Chemists Develop Public Tool for In-Depth RNA Visualization in Cells

Chemists at UMass Amherst have developed iConRNA, a publicly available tool that offers an unprecedented view of RNA behavior inside cells, aiding in understanding cellular functions and disease mechanisms related to phase separation of biomolecules.

via Phys.org|

#biomolecular-condensates #cell-biology #phase-separation

science11 months ago•2 min saved

Mitochondria Release Damaged DNA, Triggering Aging Inflammation

A study in mice reveals that mitochondria expel damaged or abnormal DNA into the cell environment, which triggers inflammation associated with aging. This process is linked to nucleotide imbalances in mitochondrial DNA, especially in aging cells, and may contribute to inflammageing, offering insights into age-related inflammation mechanisms.

via Nature|

#aging #cell-biology #dna-expulsion

science11 months ago•4 min saved

Caltech Researchers Challenge Long-Standing Mitochondrial Protein Import Model

Caltech researchers have discovered that nearly 20% of mitochondrial proteins are imported during their synthesis, guided by folding patterns and structural signals, overturning the traditional model that proteins are imported only after translation is complete.

via SciTechDaily|

#cell-biology #cotranslational #mitochondria