Coordinated expression of phosphoinositide metabolic genes during development and aging of human dorsolateral prefrontal cortex

Abstract

Background: Phosphoinositides, lipid-signaling molecules, participate in diverse brain processes within a wide metabolic cascade. Hypothesis: Gene transcriptional networks coordinately regulate the phosphoinositide cascade during human brain Development and Aging. Methods: We used the public Brain Cloud database for human dorsolateral prefrontal cortex to examine age-related expression levels of 49 phosphoinositide metabolic genes during Development (0 to 20+ years) and Aging (21+ years). Results: We identified three groups of partially overlapping genes in each of the two intervals, with similar intergroup correlations despite marked phenotypic differences between Aging and Development. In each interval, ITPKB, PLCD1, PIK3R3, ISYNA1, IMPA2, INPPL1, PI4KB, and AKT1 are in Group 1, PIK3CB, PTEN, PIK3CA, and IMPA1 in Group 2, and SACM1L, PI3KR4, INPP5A, SYNJ1, and PLCB1 in Group 3. Ten of the genes change expression nonlinearly during Development, suggesting involvement in rapidly changing neuronal, glial and myelination events. Correlated transcription for some gene pairs likely is facilitated by colocalization on the same chromosome band. Conclusions: Stable coordinated gene transcriptional networks regulate brain phosphoinositide metabolic pathways during human Development and Aging.