Testosterone-responsive mouse kidney glycosphingolipids: developmental and inbred strain effects

Area of Science:

• Biochemistry
• Molecular Biology
• Urology

Background:

• Glycosphingolipids are complex lipids found in cell membranes.
• Their composition can vary between sexes and with age.
• Specific glycosphingolipids are associated with lysosomal organelles.

Purpose of the Study:

• To analyze and compare glycosphingolipid profiles in male and female mouse kidneys and urine across different strains and ages.
• To investigate the influence of sex and testosterone on glycosphingolipid synthesis and excretion.

Main Methods:

• High-performance liquid chromatography (HPLC) was used for glycosphingolipid analysis.
• Kidney and urine samples were collected from developing and adult mice of various inbred strains (C57BL/6J, DBA/2J, CBA/J, C3H/HeJ, AKR/J).

Main Results:

• Sex-specific differences in glycosphingolipids were observed, particularly in galactosylceramide and galabiglycosylceramide.
• These differences emerged during development and were consistent in adult mice across multiple strains.
• Globotriglycosylceramides were elevated in male kidneys and present in male urine.
• Urinary glycosphingolipid patterns were strain-specific, varying in di- and triglycosylceramide levels and composition.

Conclusions:

• Testosterone appears to induce the production of specific di- and triglycosylceramides in mice.
• These testosterone-influenced glycosphingolipids are components of lysosomes and are excreted in urine.
• The findings suggest a potential role for these lipids in male-specific physiological processes or disease states.