Related Experiment Video
Updated: Oct 3, 2025

09:22
3D Visualization of Retinal Vascular Pericytes in Mice by Immunostaining
Published on: November 1, 2024
776
Is Long COVID a State of Systemic Pericyte Disarray?
Olcay Y Jones1, Sencer Yeralan2
1Pediatric Rheumatology, Walter Reed National Military Medical Center, Bethesda, MD 20889, USA.
Journal of Clinical Medicine
|February 15, 2022
Summary
Disarray of pericytes may explain Long COVID (Post-Acute Sequelae of SARS-CoV-2 Infection). This research proposes pericytes
Area of Science:
- Immunology
- Virology
- Pathology
Background:
- Post-Acute Sequelae of SARS-CoV-2 Infection (PASC), or Long COVID, presents a challenge due to the disconnect between acute viral damage and persistent symptoms.
- Current understanding lacks clear evidence of ongoing post-infectious inflammation or autoimmune reactions driving Long COVID.
- The mechanisms underlying Long COVID remain poorly defined, hindering the development of effective treatments.
Purpose of the Study:
- To propose a novel hypothesis for the pathogenesis of Long COVID.
- To investigate the potential role of pericytes in the development of Long COVID.
- To explore Long COVID as a model for understanding complex adaptive system maladies.
Main Methods:
- Conceptual communication and theoretical framework development.
- Analysis of the 'Triple-A' qualities (analyze-adapt-advance) of pericytes in maintaining host homeostasis.
- Application of systems theory and complex adaptive systems principles to Long COVID pathophysiology.
Main Results:
- The study posits that disarray of pericytes is a central factor in the emergence of Long COVID.
- Pericytes are hypothesized to possess 'Triple-A' qualities crucial for sustaining host homeostasis.
- This framework suggests Long COVID may represent a new class of complex adaptive system maladies.
Conclusions:
- Pericyte dysfunction offers a potential unifying mechanism for Long COVID.
- Long COVID can serve as a valuable model for integrating systems biology and complex adaptive systems approaches.
- Further research is warranted to explore pericyte involvement and apply systems-level analysis to poorly defined diseases.
Related Concept Videos
Myocarditis I: Introduction
52
Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
52
Chronic Pancreatitis I: Introduction
187
The pancreas, an elongated and flat gland situated behind the stomach, serves a vital function in digesting food and managing blood sugar levels.
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
187
Chronic Obstructive Pulmonary Disease-II: Pathophysiology
3.2K
Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Inflammation
3.2K
Rheumatic Heart Disease I: Introduction
73
Rheumatic heart disease or RHD is a chronic condition that results from rheumatic fever, causing permanent damage to the heart valves.Etiology and Risk FactorsIt primarily arises from rheumatic fever, an inflammatory disease that can develop after untreated or inadequately treated group A streptococcal (GAS) pharyngitis. Streptococcus spreads through direct contact with oral or respiratory secretions. While the bacteria are the causative agents, factors like malnutrition, overcrowding, poor...
73
Pericarditis I: Introduction
32
Pericarditis is defined as the inflammation of the pericardium, the thin, sac-like membrane surrounding the heart. This condition can cause significant chest pain and other symptoms, often necessitating medical intervention. The pericardium has two layers: the inner visceral layer and the outer parietal layer, separated by a small amount of fluid that reduces friction during heartbeats.Types of PericarditisPericarditis can be classified into several types based on the duration and nature of the...
32
Cardiomyopathy II: Dilated Cardiomyopathy
50
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
50

