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. 2023 Jun 16;17:1208974. doi: 10.3389/fncel.2023.1208974

FIGURE 3.

FIGURE 3

Regulation of the extracellular matrix in drug memory processing. A working hypothesis of ECM alterations from acute to chronic stages of substance use. In general, ECM molecules are degraded in acute stages, possibly to allow for formation of new synapses. PNNs and ECM molecules are generally increased with chronic use which may contribute to the strength of reward memories associated with SUD that confer relapse.