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Area of Science:

  • Developmental Biology
  • Cardiovascular Biology
  • Molecular Biology

Background:

  • Rudhira/Breast Carcinoma Amplified Sequence 3 (BCAS3) is a cytoskeletal protein involved in cell migration and angiogenesis.
  • BCAS3 is implicated in human carcinomas and coronary artery disease.
  • The role of Rudhira during embryonic development in vivo remains largely uncharacterized.

Purpose of the Study:

  • To investigate the essential role of Rudhira in mouse development and cardiovascular formation.
  • To elucidate the molecular mechanisms underlying Rudhira's function in angiogenesis and vascular patterning.

Main Methods:

  • Generation and analysis of the first Rudhira knockout mouse model.
  • Transcriptome analysis of Rudhira null yolk sacs to identify downstream molecular pathways.
  • Generation and analysis of Tie2Cre-mediated endothelial-specific Rudhira knockout (CKO) mice.
  • In vitro spheroid-sprouting assay using Rudhira knockdown endothelial cells (ECs).

Main Results:

  • Rudhira null embryos exhibit embryonic lethality at E9.5 with severe vascular patterning defects.
  • Transcriptome analysis reveals Rudhira's involvement in angiogenesis, cell adhesion, extracellular matrix organization, peptidase activity, and TGFβ signaling.
  • Endothelial-specific Rudhira knockout embryos display similar vascular defects, confirming the critical role of Rudhira in ECs.
  • Rudhira knockdown ECs show impaired sprouting in vitro, supporting its function in vascular development.

Conclusions:

  • Rudhira is essential for embryonic development, particularly for proper blood vessel formation and remodeling.
  • Endothelial Rudhira plays a vital role in vascular patterning and development.
  • This study provides a valuable mouse model for studying cardiovascular development and related diseases.