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โปรตีน PGC-1α (Peroxisome proliferator-activated receptor gamma coactivator 1-alpha) เป็นโปรตีนสำคัญที่ทำหน้าที่เป็น ...

The protein PGC-1α (Peroxisome proliferator-activated receptor gamma coactivator 1-alpha) is an important protein that functions as ...

#neuroprotective#cardiovascular#anti-aging#mitochondria#diabetes-metabolic#organ-protection

The protein PGC-1α (Peroxisome proliferator-activated receptor gamma coactivator 1-alpha) is an important protein that acts as transcriptional coactivator, which plays an important role in regulating The process of creating new mitochondria (mitochondrial biogenesis) The important biological mechanisms of PGC-1α are as follows:

Biological mechanism of PGC-1α in stimulating mitochondrial biogenesis.

1. PGC-1α stimulation

PGC-1α is stimulated by Conditions that increase energy demand, such as:

Lack of energy (fasting, calories restriction)

AMPK or SIRT1 stimulation

Examples of molecules that activate PGC-1α:

AMPK: activated when ATP levels decrease → stimulates PGC-1α

SIRT1: uses NAD⁺ → deacetylate and activate PGC-1α.

2. PGC-1α is a coactivator of several transcription factors.

Once stimulated, PGC-1α binds to key transcription factors such as:

NRF-1 (Nuclear respiratory factor 1)

NRF-2 (Nuclear respiratory factor 2)

ERRα (Estrogen-related receptor alpha)

These transcription factors stimulate the expression of genes related to:

Decoding of mitochondrial proteins

Import of proteins into the mitochondria

Enzyme production of the respiratory chain

3. Stimulate TFAM (Mitochondrial Transcription Factor A)

NRF-1/2 stimulated by PGC-1α increases TFAM expression.

TFAM plays an important role in simulation. (replication) and decoding (transcription) of mtDNA (mitochondrial DNA) → is an important step of Mitochondrial biogenesis

4. Final results

There is an increase in the number of mitochondria in the cell.

Increase efficiency in energy production (ATP)

Supports increased energy demand

Improves the functioning of the metabolic system such as muscles, brain, heart.

Simple summary:

> PGC-1α is a central control center that switches on the cell's ability to make more mitochondria. It works with other proteins to turn on genes related to energy and structure of the mitochondrion.