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Related Concept Videos

Lipid Catabolism01:25

Lipid Catabolism

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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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Pharmaceutical substances known as xenobiotics are predominantly lipophilic and nonionized. This enables them to permeate lipid bilayers, such as cell membranes, and interact with intracellular target receptors. Lipophilic drugs have an advantage in crossing biological barriers and reaching their intended sites of action. However, lipophilic drugs often have a restricted capacity for renal expulsion or elimination from the body. When these drugs enter the kidneys and undergo glomerular...
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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
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Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
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Converting bile acids into mitocans.

Benjamin Brandes1, Sophie Hoenke1, Christian Schultz1

  • 1Martin-Luther University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany.

Steroids
|November 22, 2022
PubMed
Summary
This summary is machine-generated.

New rhodamine B conjugates of bile acids exhibit potent anti-cancer properties. These novel compounds, acting as mitocans, effectively halt cancer cell growth by arresting them in the G1 phase.

Keywords:
Bile acidsMitocansRhodamine B conjugates

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Area of Science:

  • Organic Chemistry
  • Cancer Biology
  • Pharmacology

Background:

  • Bile acids are natural compounds with diverse physiological roles.
  • Modifications of bile acids can lead to compounds with potential therapeutic applications.
  • Cytotoxicity and cytostatic effects of modified bile acids are of interest in cancer research.

Purpose of the Study:

  • To synthesize novel piperazinyl spacered rhodamine B conjugates of five major bile acids: cholic acid (CD), deoxycholic acid (DCA), chenodeoxycholic acid (CDCA), ursodeoxycholic acid (UDCA), and lithocholic acid (LCA).
  • To evaluate the cytotoxic and cytostatic effects of these conjugates on human tumor cell lines.
  • To investigate the mechanism of action of the most effective compounds, identifying them as mitocans that induce G1 cell cycle arrest.

Main Methods:

  • Acetylation of parent bile acids.
  • Conversion to piperazinyl spacered rhodamine B conjugates.
  • Cytotoxicity and cytostatic assays on human tumor cell lines.
  • Cell cycle analysis using flow cytometry.
  • Mitochondrial staining experiments.

Main Results:

  • Parent bile acids demonstrated minimal cytotoxic effects on tested human tumor cell lines.
  • Piperazinyl amide conjugates exhibited cytostatic effects.
  • Rhodamine B conjugates displayed superior cytostatic and cytotoxic activity compared to parent bile acids and amides.
  • These rhodamine B conjugates were identified as mitocans, inducing a significant arrest in the G1 phase of the cell cycle.

Conclusions:

  • Piperazinyl spacered rhodamine B conjugates of bile acids represent a promising class of anti-cancer agents.
  • The observed anti-cancer activity is mediated through a mitocan mechanism leading to G1 cell cycle arrest.
  • Further investigation into these novel compounds could lead to the development of new cancer therapeutics.