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Related Concept Videos

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.
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Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
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Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
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Related Experiment Video

Updated: Jan 26, 2026

A Model of Reverse Vascular Remodeling in Pulmonary Hypertension Due to Left Heart Disease by Aortic Debanding in Rats
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[Vasoactive substance and vascular remodeling].

S Kim1

  • 1Department of Pharmacology, Osaka City University Medical School.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|August 3, 1999
PubMed
Summary
This summary is machine-generated.

Vascular remodeling involves endothelial dysfunction, smooth muscle cell changes, and extracellular matrix buildup. Key molecules like Angiotensin II drive these processes, contributing to cardiovascular diseases.

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Area of Science:

  • Cardiovascular Biology
  • Molecular Medicine

Context:

  • Vascular remodeling is a pathological process involving endothelial dysfunction, vascular smooth muscle cell (SMC) proliferation and migration, and extracellular matrix accumulation.
  • This process is implicated in various cardiovascular diseases, including hypertension and atherosclerosis.

Purpose:

  • To elucidate the molecular mechanisms underlying vascular remodeling.
  • To identify key signaling pathways and mediators involved in Angiotensin II-induced vascular remodeling.

Summary:

  • Angiotensin II promotes SMC growth, migration, and the expression of vascular remodeling-related genes.
  • Activation of the AT1 receptor by Angiotensin II leads to transactivation of growth factor receptors, such as epidermal growth factor and platelet-derived growth factor receptors, driving vascular remodeling.
  • Other vasoactive substances, including endothelin-1, nitric oxide, c-type natriuretic peptide, and adrenomedullin, also play significant roles in vascular remodeling.

Impact:

  • Understanding these pathways can inform the development of novel therapeutic strategies targeting vascular remodeling.
  • This research contributes to the broader knowledge of cardiovascular disease pathogenesis.