Longevity InTime: Autonomous AI Institute. Anti-Aging Digital Health Immortality Transhumanist AI Channel: post #1989 — TG.ME

We need to produce English translation with formatting: first line headline under 90 chars, no markdown. Then blank line, then body split into short paragraphs (2-3 sentences each), separated by blank lines. Wrap few genuinely important facts — key numbers, percentages, drug/company/gene names, dates — in double asterisks. At most 4-5 per post. Wrap study/journal citations and publication references in single underscores.

We need to preserve facts, numbers, names, citations exactly. No commentary.

Let's extract key facts:

- Date: 23 August (article in journal Aging Cell)
- Researchers described experiment with 18-month-old rats.
- After suture they delivered gene CREB3L1 to cells at damage site.
- After three weeks measured tendon gliding, load-bearing, resistance to stretch.
- Tendon transmits pull from muscle to bone.
- After rupture ends are sutured, cells need to assemble new collagen fibers: then finger bends again, suture withstands load.
- Authors compared tendons of 8-week and 18-month-old rats.
- In cells that build tissue scaffold, activity of three genes decreased with age: CREB3L1, COL1A1, SPARC.
- CREB3L1 encodes protein that activates other genes.
- COL1A1 encodes one chain of collagen I, from which load-bearing fibers are assembled; SPARC helps lay these fibers in protein matrix between cells.
- Researchers checked whether CREB3L1 can activate both genes.
- Computer search found in regulatory DNA regions of COL1A1 and SPARC sites where this protein could bind.
- These regions were attached to a fluorescent tag: CREB3L1 enhanced its signal, and mutations in the sites removed effect for all four tested SPARC variants and three of four COL1A1 variants.
- In tendon cells, extra CREB3L1 increased content of both proteins.
- Then they checked chain on healing.
- Rats had tendon cut and sutured, flexing finger, and lentivirus — modified virus for delivering CREB3L1 gene — injected into suture area.
- Separate groups received only surgery or same virus without this gene: so authors separated CREB3L1 action from suture consequences and delivery itself.
- After three weeks, under load tendon pulling, finger flexion angle was greater in males and females.
- In males, strength of healed tissue was 32.6 N vs 22.5 N after surgery alone and 23.6 N after control virus.
- Its elastic modulus — measure of resistance to stretch — rose to 11.7 N/mm vs 8.1 and 8.6 N/mm.
- In females authors confirmed improvement only by finger flexion angle.
- Thus age-related decline in gene work linked to function of restored tendon: local delivery of CREB3L1 improved its gliding in both sexes, and in males also mechanical parameters.

We need to wrap key numbers, percentages, drug/company/gene names, dates in double asterisks. At most 4-5 per post. Let's select maybe: date 23 August, gene CREB3L1, gene COL1A1, gene SPARC, numbers like 32.6 N, 22.5 N, 23.6 N, 11.7 N/mm, 8.1 N/mm, 8.6 N/mm, maybe also 18-month-old, 8-week-old. But we must limit to 4-5 double asterisks total. So we need to be selective: choose only a few important facts: maybe date, gene names, and key numeric outcomes. Let's decide: double asterisks for:

- 23 August (date)
- CREB3L1 (gene)
- COL1A1 (gene)
- SPARC (gene)
- 32.6 N (male strength)
Maybe that's 5. Could also include 11.7 N/mm but that would be 6. So we need max 5. Let's pick date and three gene names and one key outcome (male strength). Or we could include two outcomes and fewer gene names. But gene names are important facts. The instruction: "Wrap the few genuinely important facts — key numbers, percentages, drug/company/gene names, dates — in double asterisks. Be selective: at most 4-5 per post, never a whole sentence." So we can wrap gene names as they are important facts. So we could do: 23 August, CREB3L1, COL1A1, SPARC, 32.6 N. That's 5.…

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PubMed Central (PMC)
Biology of Tendon Stem Cells and Tendon in Aging
Both tendon injuries and tendinopathies, particularly rotator cuff tears, increase with tendon aging. Tendon stem cells play important roles in promoting tendon growth, maintenance, and repair. Aged tendons show a decline in regenerative potential ...
August 26, 2026 3