1
|
Kathiriya IS, Dominguez MH, Rao KS, Muncie-Vasic JM, Devine WP, Hu KM, Hota SK, Garay BI, Quintero D, Goyal P, Matthews MN, Thomas R, Sukonnik T, Miguel-Perez D, Winchester S, Brower EF, Forjaz A, Wu PH, Wirtz D, Kiemen AL, Bruneau BG. A disrupted compartment boundary underlies abnormal cardiac patterning and congenital heart defects. bioRxiv 2024:2024.02.05.578995. [PMID: 38370632 PMCID: PMC10871243 DOI: 10.1101/2024.02.05.578995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Failure of septation of the interventricular septum (IVS) is the most common congenital heart defect (CHD), but mechanisms for patterning the IVS are largely unknown. We show that a Tbx5+/Mef2cAHF+ progenitor lineage forms a compartment boundary bisecting the IVS. This coordinated population originates at a first- and second heart field interface, subsequently forming a morphogenetic nexus. Ablation of Tbx5+/Mef2cAHF+ progenitors cause IVS disorganization, right ventricular hypoplasia and mixing of IVS lineages. Reduced dosage of the CHD transcription factor TBX5 disrupts boundary position and integrity, resulting in ventricular septation defects (VSDs) and patterning defects, including Slit2 and Ntn1 misexpression. Reducing NTN1 dosage partly rescues cardiac defects in Tbx5 mutant embryos. Loss of Slit2 or Ntn1 causes VSDs and perturbed septal lineage distributions. Thus, we identify essential cues that direct progenitors to pattern a compartment boundary for proper cardiac septation, revealing new mechanisms for cardiac birth defects.
Collapse
Affiliation(s)
- Irfan S Kathiriya
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
| | - Martin H Dominguez
- Gladstone Institutes, San Francisco, CA
- Department of Medicine, University of California, San Francisco, San Francisco, CA
- Current address: Department of Medicine (Cardiovascular Medicine), Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Kavitha S Rao
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
- Gladstone Institutes, San Francisco, CA
| | | | - W Patrick Devine
- Gladstone Institutes, San Francisco, CA
- Current address: Department of Pathology, University of California, San Francisco, San Francisco, CA
| | - Kevin M Hu
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
- Gladstone Institutes, San Francisco, CA
- Current address: Creighton University School of Medicine, Omaha, NE
| | - Swetansu K Hota
- Gladstone Institutes, San Francisco, CA
- Current address: Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Bayardo I Garay
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
- Current address: University of Minnesota Medical Scientist Training Program, Minneapolis, MN
| | - Diego Quintero
- Gladstone Institutes, San Francisco, CA
- Current address: Department of Human Genetics, Emory University School of Medicine, Atlanta, GA
| | - Piyush Goyal
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
- Gladstone Institutes, San Francisco, CA
- Current address: Touro University California, Vallejo, CA
| | - Megan N Matthews
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
| | | | | | | | | | | | - André Forjaz
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD
| | - Pei-Hsun Wu
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD
| | - Denis Wirtz
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD
| | - Ashley L Kiemen
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD
| | - Benoit G Bruneau
- Gladstone Institutes, San Francisco, CA
- Roddenberry Center for Stem Cell Biology and Medicine, Gladstone Institutes, San Francisco, CA
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA
| |
Collapse
|