Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart.
In cardiac muscle, the intercalated disk (ID) at the longitudinal cell-edges of cardiomyocytes provides as a macromolecular infrastructure that integrates mechanical and electrical coupling within the heart. Pathophysiological disturbance in composition of this complex is well known to trigger cardi...
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| Format: | Article |
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Public Library of Science (PLoS)
2014-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3986238?pdf=render |
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| author | Arnold Vreeker Leonie van Stuijvenberg Thomas J Hund Peter J Mohler Peter G J Nikkels Toon A B van Veen |
| author_facet | Arnold Vreeker Leonie van Stuijvenberg Thomas J Hund Peter J Mohler Peter G J Nikkels Toon A B van Veen |
| author_sort | Arnold Vreeker |
| collection | DOAJ |
| description | In cardiac muscle, the intercalated disk (ID) at the longitudinal cell-edges of cardiomyocytes provides as a macromolecular infrastructure that integrates mechanical and electrical coupling within the heart. Pathophysiological disturbance in composition of this complex is well known to trigger cardiac arrhythmias and pump failure. The mechanisms underlying assembly of this important cellular domain in human heart is currently unknown.We collected 18 specimens from individuals that died from non-cardiovascular causes. Age of the specimens ranged from a gestational age of 15 weeks through 11 years postnatal. Immunohistochemical labeling was performed against proteins comprising desmosomes, adherens junctions, the cardiac sodium channel and gap junctions to visualize spatiotemporal alterations in subcellular location of the proteins.Changes in spatiotemporal localization of the adherens junction proteins (N-cadherin and ZO-1) and desmosomal proteins (plakoglobin, desmoplakin and plakophilin-2) were identical in all subsequent ages studied. After an initial period of diffuse and lateral labelling, all proteins were fully localized in the ID at approximately 1 year after birth. Nav1.5 that composes the cardiac sodium channel and the gap junction protein Cx43 follow a similar pattern but their arrival in the ID is detected at (much) later stages (two years for Nav1.5 and seven years for Cx43, respectively).Our data on developmental maturation of the ID in human heart indicate that generation of the mechanical junctions at the ID precedes that of the electrical junctions with a significant difference in time. In addition arrival of the electrical junctions (Nav1.5 and Cx43) is not uniform since sodium channels localize much earlier than gap junction channels. |
| first_indexed | 2024-12-10T22:27:10Z |
| format | Article |
| id | doaj.art-641b9bcee89c42a5833b01df0cb7a22d |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-10T22:27:10Z |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-641b9bcee89c42a5833b01df0cb7a22d2022-12-22T01:31:08ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-0194e9472210.1371/journal.pone.0094722Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart.Arnold VreekerLeonie van StuijvenbergThomas J HundPeter J MohlerPeter G J NikkelsToon A B van VeenIn cardiac muscle, the intercalated disk (ID) at the longitudinal cell-edges of cardiomyocytes provides as a macromolecular infrastructure that integrates mechanical and electrical coupling within the heart. Pathophysiological disturbance in composition of this complex is well known to trigger cardiac arrhythmias and pump failure. The mechanisms underlying assembly of this important cellular domain in human heart is currently unknown.We collected 18 specimens from individuals that died from non-cardiovascular causes. Age of the specimens ranged from a gestational age of 15 weeks through 11 years postnatal. Immunohistochemical labeling was performed against proteins comprising desmosomes, adherens junctions, the cardiac sodium channel and gap junctions to visualize spatiotemporal alterations in subcellular location of the proteins.Changes in spatiotemporal localization of the adherens junction proteins (N-cadherin and ZO-1) and desmosomal proteins (plakoglobin, desmoplakin and plakophilin-2) were identical in all subsequent ages studied. After an initial period of diffuse and lateral labelling, all proteins were fully localized in the ID at approximately 1 year after birth. Nav1.5 that composes the cardiac sodium channel and the gap junction protein Cx43 follow a similar pattern but their arrival in the ID is detected at (much) later stages (two years for Nav1.5 and seven years for Cx43, respectively).Our data on developmental maturation of the ID in human heart indicate that generation of the mechanical junctions at the ID precedes that of the electrical junctions with a significant difference in time. In addition arrival of the electrical junctions (Nav1.5 and Cx43) is not uniform since sodium channels localize much earlier than gap junction channels.http://europepmc.org/articles/PMC3986238?pdf=render |
| spellingShingle | Arnold Vreeker Leonie van Stuijvenberg Thomas J Hund Peter J Mohler Peter G J Nikkels Toon A B van Veen Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart. PLoS ONE |
| title | Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart. |
| title_full | Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart. |
| title_fullStr | Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart. |
| title_full_unstemmed | Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart. |
| title_short | Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart. |
| title_sort | assembly of the cardiac intercalated disk during pre and postnatal development of the human heart |
| url | http://europepmc.org/articles/PMC3986238?pdf=render |
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