Related Experiment Video

Updated: Jan 21, 2026

Author Spotlight: Exploring the Impact of Lingnan Fire-Needle Therapy in Osteoporosis Intervention
03:56

Author Spotlight: Exploring the Impact of Lingnan Fire-Needle Therapy in Osteoporosis Intervention

Published on: April 26, 2024

1.2K

AHNAK inhibits osteoporosis progression by stabilizing Smad1 protein

Weifei Zhang1, Hua Chen2, Tiantian Qi3

  • 1Department of Spine Surgery, Shenzhen Second People's Hospital, Affiliated with the First Hospital of Shenzhen University, Shenzhen, 518035, China; Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China.

Experimental Cell Research
|January 19, 2026
PubMed

Insights

The scaffold protein AHNAK (Abnormal Neuroblastoma RAS Gene Family Member 1) is crucial for bone health. Reduced AHNAK expression accelerates osteoporosis by impairing bone marrow stem cell differentiation via Smad1 stabilization.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Orthopedics

Background:

  • AHNAK (Abnormal Neuroblastoma RAS Gene Family Member 1) is a structural protein involved in numerous physiological processes.
  • AHNAK mutations are common in osteoporosis patients, but its role in osteoporosis progression remains unclear.

Purpose of the Study:

  • To investigate the role of AHNAK in osteoporosis progression.
  • To elucidate the underlying molecular mechanism of AHNAK's effect on bone metabolism.

Main Methods:

  • Assessed AHNAK expression in osteoporotic mouse bone tissues and BMSCs.
  • Performed genetic knockdown of AHNAK in BMSCs and evaluated osteogenic differentiation.
  • Investigated the effect of AHNAK on Smad1 protein stability.
  • Utilized in vivo mouse models to confirm findings.

Main Results:

  • AHNAK expression was significantly decreased in osteoporotic mouse bone tissues and BMSCs.
  • Knockdown of AHNAK impaired the osteogenic differentiation capacity of BMSCs.
  • AHNAK was found to stabilize Smad1 protein levels.
  • Overexpression of Smad1 rescued the impaired osteogenic differentiation in AHNAK-knockdown BMSCs.
  • In vivo experiments corroborated these results.

Conclusions:

  • AHNAK plays a protective role against osteoporosis progression.
  • AHNAK inhibits osteoporosis by stabilizing Smad1 protein, thereby promoting osteogenic differentiation of BMSCs.

More Related Videos

Author Spotlight: An Economic and Efficient Method for Quantitative Evaluation of Bone Microarchitecture in a Murine Osteoporosis Model06:59

Author Spotlight: An Economic and Efficient Method for Quantitative Evaluation of Bone Microarchitecture in a Murine Osteoporosis Model

Published on: September 8, 2023

3.4K
How to Stabilize Protein: Stability Screens for Thermal Shift Assays and Nano Differential Scanning Fluorimetry in the Virus-X Project07:22

How to Stabilize Protein: Stability Screens for Thermal Shift Assays and Nano Differential Scanning Fluorimetry in the Virus-X Project

Published on: February 11, 2019

29.2K

Related Concept Videos

RNA Stability01:53

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.6K
Feedback Inhibition00:46

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
56.9K
Nuclear Stability03:18

Nuclear Stability

Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
22.9K
mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
6.5K
Stability01:28

Stability

The time response of a linear time-invariant (LTI) system can be divided into transient and steady-state responses. The transient response represents the system's initial reaction to a change in input and diminishes to zero over time. In contrast, the steady-state response is the behavior that persists after the transient effects have faded.
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
392
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
7.2K