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Related Concept Videos

Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

12.1K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
12.1K
Bone Disorders01:29

Bone Disorders

3.3K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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The JAK-STAT Signaling Pathway01:20

The JAK-STAT Signaling Pathway

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Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
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Bone Remodeling01:40

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
38.0K
Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

2.8K
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...
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Autoimmune Disorders01:29

Autoimmune Disorders

313
Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune...
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Related Experiment Videos

Exploring the Causal Relationship Between Osteoporosis and Rheumatoid Arthritis: A Bidirectional Mendelian

Jie Li1, Li Bao1, Can Dai1

  • 1Department of Orthopedic Surgery, Chongqing Emergency Medical Center, Chongqing University Central Hospital, Chongqing, People's Republic of China.

Orthopedic Research and Reviews
|April 18, 2025
PubMed
Summary
This summary is machine-generated.

Osteoporosis may increase rheumatoid arthritis risk, but not vice versa. This genetic study found decreased bone mineral density is a causal factor for rheumatoid arthritis, highlighting a potential link between bone health and inflammatory joint disease.

Keywords:
GWASMendelian randomizationosteoporosisrheumatoid arthritis

Related Experiment Videos

Area of Science:

  • Genetics
  • Rheumatology
  • Osteoporosis Research

Background:

  • Osteoporosis and rheumatoid arthritis (RA) frequently co-occur.
  • The causal relationship between osteoporosis and RA is not well-established.

Purpose of the Study:

  • To investigate the potential causal genetic relationship between osteoporosis and rheumatoid arthritis (RA).
  • To determine if osteoporosis predisposes individuals to RA or if RA influences osteoporosis risk.

Main Methods:

  • Utilized a two-sample Mendelian randomization (MR) approach.
  • Employed genome-wide association study (GWAS) data for genetic instruments.
  • Applied inverse variance weighted (IVW) method and sensitivity analyses for robustness.

Main Results:

  • Decreased bone mineral density (BMD) showed a causal effect on RA risk.
  • Osteoporosis at various sites and age groups significantly impacted RA.
  • No significant causal effect of RA on osteoporosis was observed.

Conclusions:

  • Findings suggest osteoporosis may be a causal factor predisposing individuals to RA.
  • Further research is warranted to elucidate underlying mechanisms and validate findings in diverse populations.