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Updated: Sep 9, 2025

Absolute Quantitation of Inositol Pyrophosphates by Capillary Electrophoresis Electrospray Ionization Mass Spectrometry

Absolute Quantitation of Inositol Pyrophosphates by Capillary Electrophoresis Electrospray Ionization Mass Spectrometry

Published on: August 13, 2021

Using HILIC-MS/MS Method to Study Inositol Pyrophosphate.

Masatoshi Ito^1,2, Natsuko Fujii³, Shinichi Koguchi⁴

¹Department of Neurology, Tokai University School of Medicine, Isehara, Kanagawa, Japan. masatoshi.ito@marianna-u.ac.jp.

Methods in Molecular Biology (Clifton, N.J.)

|August 29, 2025

Summary

Researchers developed a new method for detecting inositol pyrophosphates (PP-InsPs), like diphosphoinositol pentakisphosphate (InsP7) and bis-diphosphoinositol tetrakisphosphate (InsP8), in mammals. This breakthrough enables precise quantitation for studying their roles in health and disease.

Keywords:

Hydrophilic interaction liquid chromatography Inositol polyphosphate Inositol pyrophosphate InsP6 InsP7 InsP8 Liquid chromatography-tandem mass spectrometry

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Preparation of Quality Inositol Pyrophosphates

Preparation of Quality Inositol Pyrophosphates

Published on: September 3, 2011

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Last Updated: Sep 9, 2025

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Preparation of Quality Inositol Pyrophosphates

Preparation of Quality Inositol Pyrophosphates

Published on: September 3, 2011

Area of Science:

Biochemistry
Analytical Chemistry
Cellular Biology

Background:

Inositol pyrophosphates (PP-InsPs), including diphosphoinositol pentakisphosphate (InsP7) and bis-diphosphoinositol tetrakisphosphate (InsP8), are crucial signaling molecules.
Direct detection of PP-InsPs in mammalian tissues is challenging due to their low abundance and chemical properties.

Purpose of the Study:

To develop a sensitive and direct analytical protocol for detecting and quantifying PP-InsPs and inositol hexakisphosphate (InsP6) in mammalian samples.
To provide a reliable method for investigating the physiological and pathological roles of PP-InsPs.

Main Methods:

Hydrophilic interaction liquid chromatography-tandem mass spectrometry (HILIC-MS/MS) was employed for sensitive detection.
High-purity synthetic standards were utilized for absolute quantitation.
Detailed protocol covers sample preparation to column regeneration.

Main Results:

The developed HILIC-MS/MS protocol enables sensitive and direct detection of InsP7, InsP8, and InsP6.
Absolute quantitation of these analytes is achievable in diverse mammalian samples, including cellular, organ, and autopsy tissues.
The method addresses the technical difficulties associated with low analyte quantities and specific chemical properties.

Conclusions:

A robust analytical protocol for PP-InsP quantitation in mammalian specimens has been established.
This method facilitates the study of inositol pyrophosphate functions in mammalian physiology and pathology.
The protocol offers an effective tool for researchers in relevant fields.