gandeism
Im a greycel, be patient
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Mechanisms which will be included:
1. Mechanosensing and mechanotransduction
2. Actomyosin cytoskeleton response
3. FAK activation
We'll start going over what these mechanisms actually are and how bonesmashing activates them in order to remodel bone.
Mechanosensing and mechanotransduction
Mechanosensing is the initial detection of physical forces by bone cells, including osteoblasts. Mechanotransduction is the process that converts these mechanical stimuli into biochemical signals inside the cell.
So you're probably wondering what these biochemical signals will do in aiding bone growth... Well, they upregulate key osteogenic transcription factors.
Pathways increase the activity of Runx2 and Osterix (Sp7), which regulate bone formation and osteoblast differentiation. Upregulation in factors like Runx2 and Osterix (Sp7) promotes bone matrix production and mineralization.
Why does that happen? Well, Runx2 upregulates genes like FGFR2 and FGFR3, which increase progenitor cells that Osterix will then mature. (The cycle is so well put together it makes me cum.)
Let's summarise ts: Runx2 makes small progenitor cells and Osterix matures them (ts is for the iqlets who will reply with dnr).
Ion channels and calcium signaling: Mechanosensitive channels like Piezo1 open in response to shear stress or tension, causing rapid Ca²⁺ influx. This activates downstream effectors such as calmodulin, mTOR, calcineurin/NFATc1, and YAP1, leading to increased osteoprotegerin (OPG) production (which inhibits osteoclasts) and osteoblast activity.
-Downstream effectors are the genes, proteins, or molecules whose expression or activity is directly or indirectly regulated/activated by an upstream factor (in this case, calmodulin, mTOR, calcineurin/NFATc1, and YAP1).
In short the Calcium ion influx increases osteoblast activity and decreases osteoclast activity
Wnt/β-catenin pathway: Mechanical strain or fluid flow stabilizes β-catenin, which translocates to the nucleus and upregulates genes for bone matrix proteins (e.g., collagen I) and osteoblast proliferation/differentiation. This is a key anabolic signal in Wolff’s law adaptation.
β-catenin: dual function protein, involved in regulation and coordination of cell–cell adhesion and gene transcription
Thats it for mechanosensing and mechanotransduction, There is a lot more to uncover but its tooo machh :(
Actomyosin cytoskeleton response
The actomyosin cytoskeleton is the contractile network inside the cell formed by actin filaments (F-actin) and myosin II motor proteins. It provides structural support, generates intracellular tension (contractility), and plays a central role in mechanotransduction in osteoblasts. (yep, we are back to mechanotransduction)
Actin filaments polymerize and bundle into stress fibers.
Myosin II binds to these filaments and uses ATP to generate pulling force, creating prestress (internal tension) in the cell.
Under mechanical loading (strain, fluid shear stress, or impact), the actomyosin network reorganizes: actin filaments align parallel to the direction of force, become thicker/more stable, and increase overall contractility.
Polymerises is the third-person singular present tense verb for the chemical process where small molecules, called monomers, react together to form long, chain-like, or three-dimensional networks known as polymers.
Osteocytes convert mechanical signals into biochemical signals:
Release signaling molecules (e.g., prostaglandins, nitric oxide)
Modulate pathways like Wnt/β-catenin signaling
All those factors result in the activation of osteoblast cells and the down regulation in the activation of osteoclasts
FAK activation (Focal Adhesion Kinase)
Focal adhesion kinase (FAK) is a non-receptor tyrosine kinase with key roles in the regulation of cell adhesion migration, proliferation and survival
How its applied to bonesmashing
FAK acts as a signaling hub controlling:
Migration (important in wound healing, cancer)
(It all comes down to mechanotransduction)
Thats it for todays guide, If you want me to elaborate or expand this topic to its full extent make sure to ask me.
Credits to pubmed for giving me a 100% of the information i needed, and for grok.ai improving my grammar
Incel credits go to:
EqBeliever and
birthdefect for investing in me
1. Mechanosensing and mechanotransduction
2. Actomyosin cytoskeleton response
3. FAK activation
We'll start going over what these mechanisms actually are and how bonesmashing activates them in order to remodel bone.
Mechanosensing and mechanotransduction
Mechanosensing is the initial detection of physical forces by bone cells, including osteoblasts. Mechanotransduction is the process that converts these mechanical stimuli into biochemical signals inside the cell.
So you're probably wondering what these biochemical signals will do in aiding bone growth... Well, they upregulate key osteogenic transcription factors.
Pathways increase the activity of Runx2 and Osterix (Sp7), which regulate bone formation and osteoblast differentiation. Upregulation in factors like Runx2 and Osterix (Sp7) promotes bone matrix production and mineralization.
Why does that happen? Well, Runx2 upregulates genes like FGFR2 and FGFR3, which increase progenitor cells that Osterix will then mature. (The cycle is so well put together it makes me cum.)
Let's summarise ts: Runx2 makes small progenitor cells and Osterix matures them (ts is for the iqlets who will reply with dnr).
Key mechanosensing pathways in osteoblasts
These pathways are directly triggered or amplified by mechanical force and contribute to the anabolic (bone-building) side of remodeling:Ion channels and calcium signaling: Mechanosensitive channels like Piezo1 open in response to shear stress or tension, causing rapid Ca²⁺ influx. This activates downstream effectors such as calmodulin, mTOR, calcineurin/NFATc1, and YAP1, leading to increased osteoprotegerin (OPG) production (which inhibits osteoclasts) and osteoblast activity.
-Downstream effectors are the genes, proteins, or molecules whose expression or activity is directly or indirectly regulated/activated by an upstream factor (in this case, calmodulin, mTOR, calcineurin/NFATc1, and YAP1).
In short the Calcium ion influx increases osteoblast activity and decreases osteoclast activity
Wnt/β-catenin pathway: Mechanical strain or fluid flow stabilizes β-catenin, which translocates to the nucleus and upregulates genes for bone matrix proteins (e.g., collagen I) and osteoblast proliferation/differentiation. This is a key anabolic signal in Wolff’s law adaptation.
β-catenin: dual function protein, involved in regulation and coordination of cell–cell adhesion and gene transcription
Thats it for mechanosensing and mechanotransduction, There is a lot more to uncover but its tooo machh :(
Actomyosin cytoskeleton response
The actomyosin cytoskeleton is the contractile network inside the cell formed by actin filaments (F-actin) and myosin II motor proteins. It provides structural support, generates intracellular tension (contractility), and plays a central role in mechanotransduction in osteoblasts. (yep, we are back to mechanotransduction)
What it is and how it responds to mechanical force:
Actin filaments polymerize and bundle into stress fibers.
Myosin II binds to these filaments and uses ATP to generate pulling force, creating prestress (internal tension) in the cell.
Under mechanical loading (strain, fluid shear stress, or impact), the actomyosin network reorganizes: actin filaments align parallel to the direction of force, become thicker/more stable, and increase overall contractility.
Polymerises is the third-person singular present tense verb for the chemical process where small molecules, called monomers, react together to form long, chain-like, or three-dimensional networks known as polymers.
Osteocytes convert mechanical signals into biochemical signals:
Release signaling molecules (e.g., prostaglandins, nitric oxide)
Modulate pathways like Wnt/β-catenin signaling
All those factors result in the activation of osteoblast cells and the down regulation in the activation of osteoclasts
FAK activation (Focal Adhesion Kinase)
Focal adhesion kinase (FAK) is a non-receptor tyrosine kinase with key roles in the regulation of cell adhesion migration, proliferation and survival
How its applied to bonesmashing
FAK acts as a signaling hub controlling:
Cell behavior
Cell adhesion and spreadingMigration (important in wound healing, cancer)
Survival and growth
Activates pathways like: PI3K/Akt, MAPK/ERKMechanotransduction
Converts mechanical force → biochemical signals(It all comes down to mechanotransduction)
Thats it for todays guide, If you want me to elaborate or expand this topic to its full extent make sure to ask me.
Credits to pubmed for giving me a 100% of the information i needed, and for grok.ai improving my grammar
Incel credits go to:

