#PDK4
PDK4 setzt an der PDH-Stufe an:
August 10, 2026 at 11:23 PM
Glykolyse, die Hemmung der mitochondrialen Glukoseoxidation, oxidativen Stress und eine selektive Dysfunktion des Komplexes I gekennzeichnet ist.

Die Autoren identifizieren zwei Mechanismen:

➡️ 1. Aktivierung von PDK4

PDK4 (Pyruvatdehydrogenase-Kinase 4) phosphoryliert und
August 10, 2026 at 11:22 PM
Anpassungsfähigkeit als potenzielle therapeutische Angriffspunkte bei COVID-19.«

„SARS-CoV-2 ORF7a treibt mitochondriale Dysfunktion durch PDK4-Aktivierung und Komplex-I-Hemmung voran“:

www.cell.com/cell-reports...
SARS-CoV-2 ORF7a drives mitochondrial dysfunction via PDK4 activation and complex I inhibition
Fernández-Rodríguez et al. show that the SARS-CoV-2 accessory protein ORF7a drives metabolic reprogramming by enhancing glycolysis and impairing mitochondrial respiration. ORF7a disrupts complex I act...
www.cell.com
August 10, 2026 at 11:31 PM
koordinierte metabolische Angriffspunkte tut:
➡️ PDK4-Aktivierung: blockiert den Zufluss von Kohlenstoff in den Citratzyklus.
➡️ Komplex-I-Hemmung: reduziert die Fähigkeit der Mitochondrien, NADH zur ATP-Erzeugung zu nutzen.

Dadurch entsteht ein plausibles Modell, in dem
August 10, 2026 at 11:29 PM
Metabolom-Profile.
Aber der auslösende virale Faktor blieb oft unklar. Die neue Arbeit weist ORF7a → PDK4 → PDH-Hemmung als kausale Achse nach.

➡️ 2. Hemmung von Komplex I

Dieser zweite zentrale Befund betrifft die NADH-Dehydrogenase (Komplex I) der mitochondrialen
August 10, 2026 at 11:24 PM
Diese Kombination führt zu einem doppelten energetischen Angriff: weniger Substrat für die Mitochondrien und gleichzeitig eine verminderte Fähigkeit, aus vorhandenem Substrat ATP zu erzeugen.
Die Arbeit verbindet erstmals in einem konsistenten Modell:
August 10, 2026 at 11:27 PM
University of Córdoba researchers studied 2 human cell lines and found SARS-CoV-2 ORF7a activated PDK4 and disrupted mitochondrial complex I assembly, reducing energy production and increasing oxidative stress.

www.cell.com/cell-reports...
SARS-CoV-2 ORF7a drives mitochondrial dysfunction via PDK4 activation and complex I inhibition
Fernández-Rodríguez et al. show that the SARS-CoV-2 accessory protein ORF7a drives metabolic reprogramming by enhancing glycolysis and impairing mitochondrial respiration. ORF7a disrupts complex I act...
www.cell.com
July 28, 2026 at 8:28 PM
Glykolyse‑Kopplung oder eine gestörte Atmungskette.
Diese Studie zeigt beides gleichzeitig (S. Abbildung). Das ist mechanistisch deutlich plausibler für eine anhaltende zelluläre Energiekrise als jeder Einzelmechanismus allein.
August 10, 2026 at 11:26 PM
Regulation of Pyruvate Dehydrogenase Kinase (Pdk4) offers mechanistic insights into enhancing stemness of aging intestinal stem cells via switching metabolic fuel preference and increased mitochondrial oxygen consumption rate

www.nature.com/articles/s42...
Mitochondrial oxidation of carbohydrate fuel driven by pyruvate dehydrogenase rescues stemness of aging intestinal stem cells - Communications Biology
Regulation of Pyruvate Dehydrogenase Kinase (Pdk4) offers mechanistic insights into enhancing stemness of aging intestinal stem cells via switching metabolic fuel preference and increased mitochondria...
www.nature.com
September 23, 2026 at 12:58 PM
Charlotte Hands Off. Enormous crowd especially for this town.
April 5, 2025 at 6:23 PM
"PDK4 is increased in hibernation and helps to decrease metabolism and conserve glucose by decreasing its conversion to acetyl-CoA, which enters the citric acid cycle and is converted to ATP." en.m.wikipedia.org/wiki/PDK4
PDK4 - Wikipedia
en.m.wikipedia.org
October 12, 2024 at 1:13 AM
SARS-CoV-2 ORF7a drives mitochondrial dysfunction via PDK4 activation and complex I inhibition

A classic virology: viruses rewire host metabolism. ORF7a drives cells toward glycolysis, away from mitochondrial respiration, favoring viral replication.

www.cell.com/cell-re...
1/8
August 11, 2026 at 4:42 PM
Die Autoren zeigen, dass ORF7a:
die Expression von PDK4 erhöht,
die PDH-Phosphorylierung steigert,
den Eintritt von Pyruvat in den Citratzyklus reduziert.
Damit wird die Zelle metabolisch in Richtung aerobe Glykolyse verschoben (ein „Warburg-ähnlicher“ Zustand).
August 10, 2026 at 11:24 PM
Study: Yangxinshi Tablet (YXS) improves post-MI heart failure. Key mechanism: inhibiting FOXO1/PDK4 signaling → restores cardiac energy metabolism & alleviates ventricular remodeling. Robust science for traditional medicine in HFrEF. 🧪🫀🔬

🔗 doi.org/10.1016/S187...

#HeartFailure #YangxinshiTablet
June 2, 2026 at 12:52 PM
SARS-CoV-2 ORF7a Drives Mitochondrial Dysfunction via PDK4 Activation and Complex I Inhibition https://www.biorxiv.org/content/10.1101/2025.09.25.678549v1
September 26, 2025 at 4:17 AM
No, this is not about SARS-CoV-2 "damaging" mitochondria. It is about SARS-CoV-2 interfering with celular metabolism. Many viruses do. The interesting question is how. Here, ORF7a appears to hit two nodes: PDK4/PDH regulation and Complex I function.
2/8
August 11, 2026 at 4:42 PM
This paper argues ORF7a contributes through PDK4 induction plus Complex I/supercomplex disruption. But, most experiments overexpress ORF7a in cell lines. The authors confirm PDK4 induction during infection, but whether ORF7a alone drives pathology in humans remains uncertain.
7/8
August 11, 2026 at 4:42 PM
Direct link to the article mentioned in the post above:

SARS-CoV-2 ORF7a drives mitochondrial dysfunction via PDK4 activation and complex I inhibition (Jul 28, 2026)
www.cell.com/cell-reports...

[ FREE PDF available ]
SARS-CoV-2 ORF7a drives mitochondrial dysfunction via PDK4 activation and complex I inhibition
Fernández-Rodríguez et al. show that the SARS-CoV-2 accessory protein ORF7a drives metabolic reprogramming by enhancing glycolysis and impairing mitochondrial respiration. ORF7a disrupts complex I act...
www.cell.com
August 11, 2026 at 3:56 PM
Researchers at the University of Córdoba studied human lung and immune cells and found that SARS-CoV-2 protein ORF7a disrupts mitochondria by blocking energy production at complex I and activating PDK4, driving oxidative stress and metabolic collapse.

www.biorxiv.org/content/10.1...
SARS-CoV-2 ORF7a Drives Mitochondrial Dysfunction via PDK4 Activation and Complex I Inhibition
SARS-CoV-2 reprograms host metabolism to promote viral replication and evade immune responses. While infection is known to impair mitochondrial function and enhance glycolysis, the role of viral acces...
www.biorxiv.org
September 26, 2025 at 11:19 AM
New research: Yangxinshi Tablet (YXS) helps repair hearts after heart attack by boosting energy metabolism & switching off stress signals (FOXO1/PDK4). Ancient wisdom + modern science for heart failure recovery. 🫀✨
🔗 www.sciencedirect.com/science/arti...

#HeartHealth #Yangxinshi #CardioCare
June 3, 2026 at 1:13 PM
Excited to share our recent work uncovering how muscle-specific mitochondrial stress responses and nutrient preferences contribute to the vulnerability of extraocular muscles in mitochondrial myopathy (MM). (#OA tinyurl.com/3estfu4y) 🦵👁️🔬 1/5
PDK4 and nutrient responses explain muscle specific manifestation in mitochondrial disease
Mitochondrial disease triggers opposite responses in different muscles. Mitochondrial integrated stress response (ISRmt) and aerobic glycolysis characterize large muscles. Eye muscles show no ISRmt b....
tinyurl.com
July 19, 2025 at 10:31 AM
3/
In vitro muscle tissue was exposed to patients' sera.

"The analyses revealed an upregulation of glycolytic enzymes especially of PDK4, suggesting a switch away from Oxidative Phosphorylation as well as a decline in DRP1, involved in mitochondrial fission”

#MEcfs #LongCovid
October 13, 2024 at 7:45 PM
@thermofishersci.bsky.social's resource, RRID:AB_143165, was just reported to be used in the paper. RRIDs improve reproducibility in scientific research. #accelerateopenscience #OpenScience #OpenResearch
Targeting PDK4 attenuates neointimal hyperplasia and regulates VSMC phenotypic Switching, Apoptosis, and autophagy
Read the full paper: Targeting PDK4 attenuates neointimal hyperplasia and regulates VSMC phenotypic Switching, Apoptosis, and autophagy
doi.org
February 14, 2026 at 8:00 AM