The Space Force is planning a series of experiments to test concepts for broadening its narrowband SATCOM mission to medium-Earth orbit.
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CRISPR-Cas orchestrates a layered defense network to fight bacterial viruses
All cellular life-from humans to bacteria-possesses two layers of immunity: innate and adaptive. Scientists have long understood how these two types of immunity work together in higher organisms but not in the microbial world.
Bacteria and archaea use CRISPR-Cas as their sole form of adaptive immunity-a precise, sequence-specific defense that remembers past invaders. But what about innate immunity? Now, a study led by Prof. LI Ming from the Institute of Microbiology of the Chinese Academy of Sciences (CAS) reveals that CRISPR-Cas plays a broader role. Rather than acting alone like a solitary sniper shooting at phages, it also serves as a central command center, directing a network of diverse innate immune systems.
This work was published in Nature on July 22.
Age-Reversing Stem Cell Treatment Succeeds in Human Trial | Dr Koji Tanabe
Discover how original Yamanaka co-author Dr. Koji Tanabe uses automated iPSC cassettes and autologous stem cell secretomes to reverse cellular aging and repair damaged joints.
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In this landmark episode of Modern Healthspan, we sit down with Dr. Koji Tanabe, founder and CEO of iPS, Inc. and co-author of the historic 2007 Nobel Prize-winning paper on human-induced pluripotent stem cells (iPSCs). Dr. Tanabe shares how twenty years of technological advancement have raised iPSC reprogramming efficiency from under 1% to over 80%, while cutting manufacturing costs through automated cleanroom cassettes. We discuss practical longevity applications available today, including autologous stem cell banking from a simple blood draw, secretome extract therapies for joint and skin rejuvenation, and Japanâs approval of iPSC-derived heart tissue. Finally, Dr. Tanabe offers a critical scientific perspective on in vivo partial reprogramming, detailing the cellular identity loss and tumor risks associated with OSK gene delivery. Watch now to learn where stem cell age reversal truly stands today.
đ Chapters.
00:00 â How the 2007 Yamanaka Breakthrough Reverses Cell Age.
09:58 â Cellular Reprogramming in Nature (Salamanders & Limbs)
15:01 â From 1% to 90%: Scaling Transfection Efficiency.
19:57 â Mass Production: Automated Cassettes for Stem Cells.
24:57 â Slashed Costs: Disrupting the $10M Treatment Price Tag.
29:58 â Retrovirus Danger: Preventing Toxic Contamination.
35:01 â Japanâs Law: Safety Testing & Rejuvenation Services.
39:58 â Next-Gen Immune Therapy: iPSCs vs Cancer & Aging.
44:59 â The In-Vivo Reprogramming Risk: Why It Fails.
49:59 â Infinite Cellular Supply: Pluripotencyâs Power.
54:57 â Beyond Reprogramming: Solving the Extracellular Matrix.
Medical Disclaimer:
Team uses AlphaFold AI to redesign geneediting proteins to make them safer
A couple of decades after the discovery of systems that could selectively target DNA, weâre starting to see the first therapies based on gene editing. One challenge these developments have faced is safety. While we can make them pretty specific to the gene we want edited, the human genome is very large, and even rare DNA sequences can appear a couple of times by chance.
As a result, all the original gene-editing systems had known rates of what are called off-target effects, in which they simply edit the wrong sequence. This may be a low-probability event, but edit enough cellsâand therapies generally have to edit manyâand errors become inevitable.
A lot of effort has gone into finding ways to minimize or eliminate off-target edits. In a recent issue of Nature, researchers described modifying the AI protein-folding software AlphaFold to help identify key areas of gene-editing proteins responsible for off-target effects. Those areas were then modified to reduce the problems.
Giving antibodies âeyesâ may help target hidden KRAS mutations in cancer cells
Antibodies are like âguided missilesâ that find and attack cancer cells, but cancer-causing mutations inside cells have remained a âblind spotâ for treatment because antibodies cannot reach them. KAIST researchers have now succeeded in precisely targeting intracellular cancer mutations using a newly designed antibody created through computational methods.
The work is published in the journal Molecular Therapy.
This achievement is expected to open a new path toward next-generation precision therapies for difficult-to-treat cancers, going beyond the limitations of conventional antibody treatments.
Do animals use names? Conceptual and empirical criteria
In recent years, several claims have been put forth suggesting that animals of different species address each other using receiver-specific calls that function as individual names. If accurate, this would demonstrate a capacity for symbolic social reference that has rarely been documented in nonhuman communication systems. To evaluate such claims, we propose three minimal criteria for identifying names: individual reference, symbolic represent ation, and shared meaning. We then review the evidence relevant to these criteria in the species for which name-like calls have been suggested: spectacled parrotlets, common marmosets, African elephants, and bottlenose dolphins. Together, these criteria provide a clear and theoretically grounded framework for exploring the use of name-like calls in nonhuman animals.
Injectable biomaterial harnesses the immune system to promote brain repair after stroke
Biomedical engineers at Duke University have developed an injectable biomaterial that helps transform the cavity left behind after a stroke caused by a blood clot into an environment more supportive of repair. By recruiting the bodyâs own immune cells, the treatment promoted the growth of new blood vessels, supported neural remodeling and improved motor performance in mice. The work appears in Cell Biomaterials.
Every year, millions of people experience strokes caused by blood clots, called ischemic strokes. Immediate treatments, including clot-dissolving drugs and mechanical removal of the clot, can restore blood flow and preserve threatened brain tissue. But these treatments cannot replace tissue that has already been lost.
Large strokes can result in substantial tissue loss and leave behind a cavity at the site of the injury. After the clot is removed, recovery relies largely on rehabilitation, which helps surviving brain circuits adapt but does not directly repair the damaged area.
