Key result
Nonenzymatically oxidized arachidonic acid was 25-fold more potent than arachidonic acid at inhibiting T-type Ca2+ currents in mouse spermatogenic cells.
Why the study?
Spontaneous oxidation of fatty acids causes a decrease in mammalian fertility, but the effects of nonenzymatically oxidized arachidonic acid on spermatogenic T-type Ca2+ currents were unknown.
Nonenzymatically oxidized arachidonic acid potently inhibits T-type Ca2+ currents in mouse spermatogenic cells, which may contribute to male infertility.
Oxidized arachidonic acid may contribute to oxidative stress-related male infertility; hypothesis-generating for human spermatogenic effects.
During spermatogenesis, fatty acids play an important role both as structural components and messengers that trigger male germ cell line differentiation. The spontaneous oxidation of fatty acids causes a decrease in mammalian fertility. Here, we examine the effects of nonenzymatically oxidized arachidonic acid (AA ox ) on mouse spermatogenic T‐type Ca 2+ currents (I CaT ) due to their physiological relevance during spermatogenesis. AA ox is 25‐fold more potent than AA at inhibiting I CaT and it left shifts the I‐V curve peak and both activation and steady‐state inactivation curves. In addition, I CaT deactivation kinetics and their recovery from inactivation are slower in the presence of AA ox . Therefore, the fraction of inactivated Ca 2+ channels is increased. AA ox ‐induced I CaT inhibition could contribute to male infertility affecting Ca 2+ regulation in spermatogenic cells.
No takes yet. Share an insight, caveat, or question.
Bondarenko et al. (2019) studied Male infertility. Nonenzymatically oxidized arachidonic acid (AA ox) vs. Arachidonic acid (AA) was evaluated on Inhibition of T-type Ca 2+ currents (I CaT) (25-fold more potent). Nonenzymatically oxidized arachidonic acid was 25-fold more potent than arachidonic acid at inhibiting T-type Ca2+ currents in mouse spermatogenic cells.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: