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. 2021 Oct 14;15:767560. doi: 10.3389/fnins.2021.767560

FIGURE 6.

FIGURE 6

Schematic diagram of cognitive function impaired by abnormal lactate metabolism in Pdha1–/– mice. Due to decreased PDC activity, lactate abnormally increases, and excessive lactate transport through MCTs leads to tissue microenvironment acidification. Increased lactate also inhibits the cAMP/PKA/CREB signaling pathway by activating HCAR1, resulting in the decline of cognitive function in mice.