PLoS One November 2015 PMID 25020061

Fasting increases human skeletal muscle net phenylalanine release and this is associated with decreased mTOR signaling.

Mikkel Holm Vendelbo, Andreas Buch Møller, Britt Christensen, Birgitte Nellemann, Berthil Frederik Forrest Clasen, K Sreekumaran Nair, Jens Otto Lunde Jørgensen, Niels Jessen, Niels Møller

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Mentions

12
Peak: 1 in Apr 2021
across 3 sources since Apr 2021

Extended reach

409,947
potential audience

Total likes

9,669

Video views

378,534

Mentions per month

Apr 2021 – Sep 2025

Where it's discussed

  • X / Twitter6 posts
  • YouTube4 videos
  • News2 articles

AI synopsis

What people are saying

Overall, the discussions show a scientific curiosity about molecular mechanisms such as mTOR signaling and autophagy, with some posts referencing specific experimental results like unchanged protein degradation markers or decreased mTOR phosphorylation. The tone ranges from casual fun to scientific curiosity, indicating moderate engagement and interest in the study's implications.

AgreementModerate agreement

Most posts imply some level of agreement with the significance of the findings, such as the mention of

InterestModerate interest

Discussions reflect moderate interest, with some posts exploring mechanistic details like mTOR and autophagy but not deeply delving into broader implications.

EngagementModerate engagement

Posts reference specific molecular markers like MAFbx, MURF1, LC3B-II, and mTOR phosphorylation, indicating active engagement.

ImpactModerate impact

The discussion around lifespan extension and fast-mimicking treatments suggests awareness of potential impact, though not universally emphasized.

Abstract in brief

  • Fasting for 72 hours leads to increased release of phenylalanine from skeletal muscle and a significant reduction in mTOR activity, which is crucial for cell growth and protein synthesis.
  • The study found that fasting decreased the phosphorylation of mTOR and downstream targets like 4EBP1, ULK1, and rpS6, indicating suppressed muscle protein synthesis and increased autophagy, while no change was observed in muscle protein breakdown markers.
  • These findings suggest that extended fasting causes muscle protein loss by decreasing mTOR signaling and autophagy regulation, contributing to the overall loss of body proteins during fasting.]

Top posts

Most liked on X and Bluesky
UltimApe
@ultimape · X

@Mangan150 @jasonmpeirce @naval Nice. "Leontieva et al recently showed that a once-weekly treatment with rapamycin extends lifespan in high fat-fed mice without altering glucose or insulin levels" https://t.co/n97GkGz0Qy So it's fast mimicking? https://t.co/Ze3vNPE7cu Fun.

Apr 1, 2021 · 2 likes · 6,694 followers View post →
Effi Lifshitz
@efraimleaf · X

@JScholar נכון שהמחקרים הזמינים קצרי טווח, אבל מה שוודאי הוא ש TRE מפחית אינסולין, גלוקוז וחומצות אמינו רגולטרים של mTOR. בנוסף IGF-1 (עוד פרוקסי ל mTOR) נמוך שיטתית באוכלוסיות שלא צורכות הרבה חלבון מהחי. אין טענה ל״ניסים״, אלא שזו פרקטיקה פשוטה ויעילה בכיוון חיובי. https://t.co/qxnncqsOEo

Jun 1, 2025 · 1 like · 11,412 followers View post →
ぎ~く
@kusonote · X

@kagashin_sub 糖新生の分はあるが、水のみ48時間断食でも特に分解が活性化されているわけでもなさそう "MAFbx and MURF1 ubiquitin ligases remained unaltered after fasting indicating no change in protesomal protein degradation." https://t.co/MI0cAlOpGR

Apr 30, 2024 · 1 like · 219 followers View post →
DrAdriana Radler-Pohl
@ARadlerPohlDr · X

@miklosch @Manni75057232 https://t.co/uAjBlPRMb4

Nov 7, 2021 · 7,116 followers View post →
Sabine Stebel
@Sabisteb · X

@NarfGb mTOR phosphorylation was decreased by ∼50% following fasting, https://t.co/r5wrHRIiTJ

Feb 16, 2024 · 5,596 followers View post →
davesoma
@dscompounding · X

Autophagy initiation is in part regulated by mTOR through ULK1 and fasting increased expression of the autophagic marker LC3B-II by ∼30%." 2/ https://t.co/AKg3eumMJZ

Jan 30, 2022 · 377 followers View post →

All mentions

Effi Lifshitz
@efraimleaf · X

@JScholar נכון שהמחקרים הזמינים קצרי טווח, אבל מה שוודאי הוא ש TRE מפחית אינסולין, גלוקוז וחומצות אמינו רגולטרים של mTOR. בנוסף IGF-1 (עוד פרוקסי ל mTOR) נמוך שיטתית באוכלוסיות שלא צורכות הרבה חלבון מהחי. אין טענה ל״ניסים״, אלא שזו פרקטיקה פשוטה ויעילה בכיוון חיובי. https://t.co/qxnncqsOEo

Jun 1, 2025 · 1 like · 11,412 followers View post →
ぎ~く
@kusonote · X

@kagashin_sub 糖新生の分はあるが、水のみ48時間断食でも特に分解が活性化されているわけでもなさそう "MAFbx and MURF1 ubiquitin ligases remained unaltered after fasting indicating no change in protesomal protein degradation." https://t.co/MI0cAlOpGR

Apr 30, 2024 · 1 like · 219 followers View post →
Sabine Stebel
@Sabisteb · X

@NarfGb mTOR phosphorylation was decreased by ∼50% following fasting, https://t.co/r5wrHRIiTJ

Feb 16, 2024 · 5,596 followers View post →
davesoma
@dscompounding · X

Autophagy initiation is in part regulated by mTOR through ULK1 and fasting increased expression of the autophagic marker LC3B-II by ∼30%." 2/ https://t.co/AKg3eumMJZ

Jan 30, 2022 · 377 followers View post →
DrAdriana Radler-Pohl
@ARadlerPohlDr · X

@miklosch @Manni75057232 https://t.co/uAjBlPRMb4

Nov 7, 2021 · 7,116 followers View post →
UltimApe
@ultimape · X

@Mangan150 @jasonmpeirce @naval Nice. "Leontieva et al recently showed that a once-weekly treatment with rapamycin extends lifespan in high fat-fed mice without altering glucose or insulin levels" https://t.co/n97GkGz0Qy So it's fast mimicking? https://t.co/Ze3vNPE7cu Fun.

Apr 1, 2021 · 2 likes · 6,694 followers View post →