Accurate biometal quantification per individual Caenorhabditis elegans

Area of Science:

• Life Sciences
• Biochemistry
• Toxicology

Background:

• Small model organisms like Caenorhabditis elegans are vital for research in genetics, development, neuroscience, and disease.
• Metal ion cofactors are crucial for cellular processes, and their metabolism impacts biology and disease.
• Accurate quantification of endogenous metal content is essential for biological studies.

Purpose of the Study:

• To establish a standardized method for quantifying biometal content in individual C. elegans.
• To assess the variation in metal content among isogenic C. elegans populations.
• To compare the accuracy and precision of ICP-MS and XFM for biometal analysis in C. elegans.

Main Methods:

• Inductively coupled plasma mass spectrometry (ICP-MS) was used to quantify metal ions.
• Synchrotron-based X-ray fluorescence microscopy (XFM) was employed for elemental mapping.
• The study determined that ten or more adult C. elegans are needed for reliable ICP-MS quantification.

Main Results:

• Ten or more adult C. elegans are required for accurate quantification of physiologically important metals via ICP-MS.
• The study compared the accuracy and precision of ICP-MS with XFM.
• Variation in metal content between individual C. elegans was assessed.

Conclusions:

• A minimum of ten adult C. elegans are necessary for reliable metal quantification using ICP-MS.
• Both ICP-MS and XFM are valuable tools for studying biometal content and variation in C. elegans.
• This work provides a foundation for standardized biometal quantification in this model organism.