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Related Concept Videos

Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
GPCRs Regulate Adenylyl Cylase Activity01:09

GPCRs Regulate Adenylyl Cylase Activity

Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of cells.
Two...
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...
Co-activators and Co-repressors02:04

Co-activators and Co-repressors

Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Co-activators and Co-repressors02:04

Co-activators and Co-repressors

Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Regulation of Heart Rates01:31

Regulation of Heart Rates

The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...

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PGC-1 coactivators in the cardiovascular system.

Ian S Patten1, Zolt Arany

  • 1Cardiovascular Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.

Trends in Endocrinology and Metabolism: TEM
|November 4, 2011
PubMed
Summary
This summary is machine-generated.

The heart

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Area of Science:

  • Cardiovascular Biology
  • Mitochondrial Function
  • Transcriptional Regulation

Background:

  • The heart requires substantial ATP, necessitating complex fuel and oxygen processing machinery within cardiomyocytes.
  • Mitochondria are crucial for cardiac energy metabolism, constituting a significant portion of cardiac mass.
  • PGC-1 proteins are key transcriptional coactivators involved in regulating cellular energy homeostasis.

Purpose of the Study:

  • To review the literature on the role of PGC-1 proteins in cardiac function.
  • To highlight recent developments concerning PGC-1s in both cardiac and vascular biology.
  • To emphasize the importance of PGC-1s in orchestrating cellular processes related to energy demands.

Main Methods:

  • Literature review of existing studies on PGC-1 proteins in cardiovascular and vascular systems.
  • Synthesis of recent findings on the regulatory roles of PGC-1 coactivators.
  • Focus on the coregulation of cellular processes in response to physiological cues.

Main Results:

  • Established role of PGC-1 proteins in maintaining cardiac function and energy metabolism.
  • Emerging evidence points to a significant role for PGC-1s in vascular biology.
  • PGC-1s act as central orchestrators of complex cellular machineries in response to metabolic demands.

Conclusions:

  • PGC-1 proteins are critical regulators of cardiac energy metabolism and function.
  • Further research into the vascular roles of PGC-1s is warranted.
  • Understanding PGC-1 regulation is key to addressing cardiovascular and metabolic diseases.