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Regulation of Angiogenesis and Blood Supply

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...

Blood and Nerve Supply to the Bones

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Bones are dynamic organs that require a rich supply of oxygen and nutrients. Around 5% to 10% of the cardiac output supplies blood to the bones. A typical long bone has three main sources: the nutrient artery, the metaphyseal and epiphyseal arteries, and the periosteal arteries.
Nutrient Artery
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Overview of the Vascular System

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The vascular system comprises an extensive network of arteries, capillaries, and veins. The vascular system can be broadly divided into the blood and lymphatic systems. Typically, blood vessels can be categorized into three histological regions: tunica intima, tunica media, and tunica adventitia. The tunica intima consists of a single layer of endothelial cells attached to the basal lamina. Underlying the basal lamina is a connective tissue layer and an elastic lamina that gives stability and...

Development of Blood Vessels

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The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...

Anatomy of Blood Vessels

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The vascular system, an integral part of the circulatory system, comprises various blood vessels that play crucial roles in maintaining the body's homeostasis. These blood vessels form a complex and efficient circulatory network. The three primary categories of blood vessels are the arteries, veins, and capillaries.
Arteries
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Mechanism of Angiogenesis

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Related Experiment Video

Updated: May 8, 2026

Computed Tomography and Optical Imaging of Osteogenesis-angiogenesis Coupling to Assess Integration of Cranial Bone Autografts and Allografts

Computed Tomography and Optical Imaging of Osteogenesis-angiogenesis Coupling to Assess Integration of Cranial Bone Autografts and Allografts

Published on: December 22, 2015

Bone vascularization in normal and disease conditions.

Christian Carulli¹, Massimo Innocenti, Maria Luisa Brandi

¹Department of Surgery and Translational Medicine, University of Florence , Florence , Italy.

Frontiers in Endocrinology

|August 30, 2013

Summary

Bone vasculature and endothelium are vital for skeletal health. Dysfunctional interactions lead to bone pathologies, prompting exploration of new therapeutic strategies for bone vascular disorders.

Keywords:

bone endothelium metabolism bone vascular biology

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Cerebrovascular Casting of the Adult Mouse for 3D Imaging and Morphological Analysis

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Last Updated: May 8, 2026

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Cerebrovascular Casting of the Adult Mouse for 3D Imaging and Morphological Analysis

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Published on: November 30, 2011

Area of Science:

Bone Biology
Vascular Biology
Endothelial Cell Biology

Background:

Bone vasculature is crucial for skeletal development, remodeling, and healing.
Endothelium plays a physiological role through growth factor release and cellular interactions.
Imbalances in bone vasculature or endothelium metabolism cause distinct pathologies.

Purpose of the Study:

To review molecular interactions between endothelial and bone cells.
To provide an overview of recent findings in bone vascular physiopathology.
To discuss modern therapeutic strategies for bone vascular diseases.

Main Methods:

Literature review focusing on molecular interactions.
Analysis of recent research on bone vascular physiopathology.
Synthesis of current therapeutic approaches.

Main Results:

Detailed examination of endothelial-bone cell molecular crosstalk.
Identification of pathologies arising from vascular defects or excess.
Discussion of clinical manifestations linked to endothelial dysfunction.

Conclusions:

Understanding endothelial-bone cell interactions is key to addressing bone pathologies.
Therapeutic strategies are evolving based on molecular insights.
Targeting bone vasculature offers promising treatment avenues.