Cells, cytokines and cellular immunity in the pathogenesis of fibroproliferative vasculopathies

Amit K Mitra1, Michael G Del Core, Devendra K Agrawal

  • 1Department of Biomedical Sciences, Creighton University School of Medicine, Omaha, NE 68178, USA.

Insights

Atherosclerosis and restenosis stem from vascular injury, triggering inflammation and cell growth. Understanding the roles of platelets, leukocytes, and immune cells in these vascular diseases can lead to improved treatments.

Area of Science:

  • Cardiovascular Biology
  • Immunology
  • Cellular Biology

Background:

  • Atherosclerosis and restenosis are complex vascular diseases.
  • They arise after vascular injury, initiating inflammatory and fibroproliferative responses.
  • These responses involve numerous growth factors, cytokines, and cellular elements.

Purpose of the Study:

  • To discuss the roles of various cellular elements and mediators in vascular disease pathogenesis.
  • To highlight the importance of platelet activation and leukocyte recruitment.
  • To provide insights for developing novel therapeutic strategies.

Main Methods:

  • Review and discussion of existing literature on vascular injury response.
  • Analysis of the roles of macrophages, lymphocytes, and mast cells.
  • Examination of the involvement of growth factors and cytokines.

Main Results:

  • Platelet activation and leukocyte recruitment are critical in initiating vascular smooth muscle cell hyperplasia and intimal migration.
  • Macrophages, lymphocytes, and mast cells act as key mediators of inflammation and immune responses.
  • Growth factors and cytokines play significant roles in the disease process.

Conclusions:

  • Understanding the intricate inflammatory and cellular mechanisms is crucial for combating atherosclerosis and restenosis.
  • Newer therapeutic strategies can be developed by shedding light on these 'old' vascular problems.

Related Concept Videos

Introduction to Fibroblasts01:09

Introduction to Fibroblasts

Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
Chronic Inflammation: Introduction01:12

Chronic Inflammation: Introduction

Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...
Regulation of Angiogenesis and Blood Supply01:24

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...
Inflammatory Response I: Vascular and Cellular01:30

Inflammatory Response I: Vascular and Cellular

The inflammatory response is the body's defense against infection, injury, or irritation from bacteria, trauma, toxins, or heat. Inflammation helps locate and destroy pathogens and remove damaged tissue elements to heal the body. During this initial phase, fluid, blood products, and nutrients migrate to the injured area, resulting in redness, heat, swelling, ache, and loss of function. Moreover, signs of systemic inflammation include fever, increased WBC count, malaise, anorexia, nausea,...
Cirrhosis II: Pathophysiology01:24

Cirrhosis II: Pathophysiology

Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to structural...
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...