Cardiovascular ATIP (Angiotensin receptor type 2 interacting protein) expression in mouse development

Area of Science:

• Developmental Biology
• Molecular Biology
• Genetics

Background:

• Angiotensin receptor type 2 (AT2) interacting proteins (ATIPs) are variants of AT2 interacting proteins.
• Their expression and functional roles during mammalian development remain largely unknown.

Purpose of the Study:

• To investigate the expression patterns of ATIP variants during mouse development.
• To elucidate the potential roles of ATIPs in cardiovascular and other organ system development.

Main Methods:

• Visualization of Mtus1 promoter activity, Mtus1 RNA, and ATIP protein expression.
• Analysis of spatial and temporal expression patterns during embryonic development.

Main Results:

• ATIPs are highly expressed in the developing cardiovascular system, including the yolk sac vasculature and placenta.
• Distinct expression patterns observed in eye, limb bud, lung, and nervous system development.
• Specific ATIP isoforms show differential expression correlating with cardiovascular, lung, limb bud, brain, and eye development.
• Mtus1 expression is not always correlated with Agtr2 expression, indicating potential AT2-independent functions.

Conclusions:

• ATIPs play a significant role in the developmental regulation of the cardiovascular system.
• ATIPs may exert functions through both AT2-dependent and AT2-independent pathways.
• These findings provide crucial insights into the multifaceted roles of ATIPs in mammalian development.