The neuropeptide landscape of human prefrontal cortex

• Published in: Proceedings of the National Academy of Sciences - PNAS Vol. 119; no. 33; p. 1
• Main Authors: Zhong, Wen, Barde, Swapnali, Mitsios, Nicholas, Adori, Csaba, Oksvold, Per, Feilitzen, Kalle von, O’Leary, Liam, Csiba, László, Hortobágyi, Tibor, Szocsics, Péter, Mechawar, Naguib, Maglóczky, Zsófia, Renner, Éva, Palkovits, Miklós, Uhlén, Mathias, Mulder, Jan, Hökfelt, Tomas
• Format: Journal Article
• Language: English
• Published: Washington National Academy of Sciences 16.08.2022
• Subjects: Adiponectin; Amphetamines; anterior cingulate cortex; Biological Sciences; Circuits; classic neurotransmitter coexistence; Cocaine; Cognitive ability; Cortex (cingulate); Galanin; Gene expression; Gene sequencing; Glucagon; Glutamatergic transmission; Hormones; in situ hybridization; Leptin; Medicin och hälsovetenskap; Mental disorders; Neural networks; Neuropeptide receptors; Neuropeptides; Orexins; Peptide hormones; Peptides; Peripheral blood; Prefrontal cortex; Receptors; RNA-seq; Somatostatin; Transcriptomics; RNA-seq; classic neurotransmitter coexistence; anterior cingulate cortex; in situ hybridization
• ISSN: 0027-8424; 1091-6490; 1091-6490
• DOI: 10.1073/pnas.2123146119

Human prefrontal cortex (hPFC) is a complex brain region involved in cognitive and emotional processes and several psychiatric disorders. Here, we present an overview of the distribution of the peptidergic systems in 17 subregions of hPFC and three reference cortices obtained by microdissection and based on RNA sequencing and RNAscope methods integrated with published single-cell transcriptomics data. We detected expression of 60 neuropeptides and 60 neuropeptide receptors in at least one of the hPFC subregions. The results reveal that the peptidergic landscape in PFC consists of closely located and functionally different subregions with unique peptide/transmitter–related profiles. Neuropeptide-rich PFC subregions were identified, encompassing regions from anterior cingulate cortex/orbitofrontal gyrus. Furthermore, marked differences in gene expression exist between different PFC regions (>5-fold; cocaine and amphetamine–regulated transcript peptide) as well as between PFC regions and reference regions, for example, for somatostatin and several receptors. We suggest that the present approach allows definition of, still hypothetical, microcircuits exemplified by glutamatergic neurons expressing a peptide cotransmitter either as an agonist (hypocretin/orexin) or antagonist (galanin). Specific neuropeptide receptors have been identified as possible targets for neuronal afferents and, interestingly, peripheral blood-borne peptide hormones (leptin, adiponectin, gastric inhibitory peptide, glucagon-like peptides, and peptide YY). Together with other recent publications, our results support the view that neuropeptide systems may play an important role in hPFC and underpin the concept that neuropeptide signaling helps stabilize circuit connectivity and fine-tune/modulate PFC functions executed during health and disease.