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Related Experiment Video

Updated: Jul 16, 2026

Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro
05:47

Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro

Published on: May 10, 2021

Nanobacteria-associated calcific aortic valve stenosis.

Tomislav M Jelic1, Ho-Huang Chang, Rod Roque

  • 1Department of Pathology, Charleston Area Medical Center, West Virginia University, WV 25304, USA. tomislav.jelic@camc.org

The Journal of Heart Valve Disease
|February 24, 2007
PubMed
Summary

Calcific aortic valve stenosis may be caused by nanobacteria, which form mineralized colonies in heart valve nodules. This finding could reveal new insights into the cellular basis of this common valvular disease.

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Related Experiment Videos

Last Updated: Jul 16, 2026

Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro
05:47

Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro

Published on: May 10, 2021

Investigating Aortic Valve Calcification via Isolation and Culture of T Lymphocytes using Feeder Cells from Irradiated Buffy Coat
04:30

Investigating Aortic Valve Calcification via Isolation and Culture of T Lymphocytes using Feeder Cells from Irradiated Buffy Coat

Published on: February 4, 2021

Isolation of Human Primary Valve Cells for In vitro Disease Modeling
07:31

Isolation of Human Primary Valve Cells for In vitro Disease Modeling

Published on: April 16, 2021

Area of Science:

  • Cardiovascular Biology
  • Microbiology
  • Pathology

Background:

  • Calcific aortic valve stenosis (CAVS) is the most prevalent valvular heart disease in developed nations, necessitating costly surgical valve replacement.
  • The underlying cellular mechanisms driving aortic valve calcification, particularly in high-perfusion cardiac regions, remain poorly understood.
  • Current treatments for CAVS focus on surgical intervention, highlighting the need for novel therapeutic targets.

Observation:

  • Transmission electron microscopy revealed extensive, progressively mineralized nanobacterial colonies within fibrocalcific nodules of aortic valve cusps in a patient with severe CAVS.
  • These nanobacteria exhibited significant bioadhesivity, suggesting a potential role in initiating and promoting valvular calcification.
  • The presence of these microorganisms offers a new perspective on the etiology of aortic valve calcification.

Findings:

  • Nanobacteria, identified through electron microscopy, were consistently found in calcified aortic valve tissue.
  • The observed bioadhesivity of nanobacteria suggests a mechanism for their colonization and contribution to valvular matrix mineralization.
  • This case presents direct evidence linking nanobacterial presence to the pathological calcification process in aortic valve stenosis.

Implications:

  • Nanobacteria may represent a novel causative agent in the development of calcific aortic valve stenosis.
  • Understanding the role of nanobacteria could lead to new diagnostic markers and therapeutic strategies for CAVS.
  • Further research into nanobacterial interactions with valvular tissue is warranted to elucidate their precise contribution to cardiovascular disease.