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An Introduction to Spiral Steroids.

Fred Chasalow1,2

  • 1IOMA LLC, Belmont, CA 94002-3321, USA.

International Journal of Molecular Sciences
|September 9, 2022
PubMed
Summary

This review details novel steroid compounds derived from 7-dehydrocholesterol, not cholesterol. These unique spiral steroids and phosphodiesters regulate different isoforms of the sodium-potassium pump (NaK-ATPase), impacting endocrine regulation.

Keywords:
NaK-ATPasedigoxin-like materialsionotropinpotassium sparing diureticsspiral steroids

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Area of Science:

  • Biochemistry
  • Endocrinology
  • Molecular Biology

Background:

  • Classical steroids are synthesized from cholesterol.
  • A distinct class of steroids originates from 7-dehydrocholesterol.
  • The existence and function of these novel steroid classes were previously unknown.

Purpose of the Study:

  • To review the identification and biosynthesis of steroids derived from 7-dehydrocholesterol.
  • To explore the structure and function of these novel steroid compounds.
  • To elucidate their role in endocrine regulation via NaK-ATPase modulation.

Main Methods:

  • Identification of novel steroid compounds.
  • Characterization by mass spectrometry and proposed composition.
  • Purification of six compounds to near homogeneity.

Main Results:

  • Discovery of three classes of steroids (23, 24, and 25 carbons).
  • Identification of unique spiral steroid structures and phosphodiester linkages.
  • Demonstration of function in regulating NaK-ATPase isoforms.

Conclusions:

  • 7-dehydrocholesterol is a precursor to a novel class of functional steroids.
  • These steroids, characterized by spiral structures and phosphodiester bonds, represent a new area of endocrine regulation.
  • Specific steroid classes appear to target distinct NaK-ATPase isoforms, highlighting tissue-specific regulatory roles.