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MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...

Osteoclasts in Bone Remodeling

Osteoclasts in Bone Remodeling

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...

Master Transcription Regulators

Master Transcription Regulators

Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...

Bone Formation by Endochondral Ossification

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Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...

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Related Experiment Video

Updated: May 25, 2026

Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification

Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification

Published on: December 3, 2016

MicroRNAs regulate osteogenesis and chondrogenesis.

Shiwu Dong¹, Bo Yang, Hongfeng Guo

¹Laboratory of Biomechanics, Department of Anatomy, The Third Military Medical University, Chongqing, China. shiwudong@gmail.com

Biochemical and Biophysical Research Communications

|February 7, 2012

Summary

This summary is machine-generated.

MicroRNAs (miRNAs) regulate gene expression and are key in bone biology. This review focuses on how these small RNAs control bone and cartilage formation, offering potential therapeutic targets for bone diseases.

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Isolation of Whole Cell Protein Lysates from Mouse Facial Processes and Cultured Palatal Mesenchyme Cells for Phosphoprotein Analysis

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Area of Science:

Biochemistry
Molecular Biology
Genetics

Background:

MicroRNAs (miRNAs) are small, non-coding RNAs regulating gene expression post-transcriptionally.
miRNAs play crucial roles in organism development and disease pathology.
Specific miRNAs influence osteoblast, osteoclast, and chondrocyte functions, impacting bone metabolism and formation.

Purpose of the Study:

To review current research on microRNA regulation in bone biology.
To highlight miRNA-mediated mechanisms controlling bone and cartilage formation.
To explore the therapeutic potential of miRNAs in bone diseases.

Main Methods:

Literature review of recent studies on miRNAs in bone biology.
Analysis of miRNA-mediated gene regulation in osteogenesis and chondrogenesis.
Synthesis of findings on miRNA roles in bone metabolism and repair.

Main Results:

miRNAs are critical regulators of osteoblast, osteoclast, and chondrocyte proliferation and differentiation.
Specific miRNAs have been identified that modulate bone and cartilage formation processes.
Dysregulation of miRNAs is implicated in metabolic bone diseases and bone injuries.

Conclusions:

MicroRNAs are essential regulators of bone biology, influencing skeletal development and homeostasis.
miRNA-based therapeutics hold promise for treating metabolic bone disorders and bone injuries.
Further research into miRNA mechanisms can unlock new strategies for bone regeneration and disease management.