PMID- 34790800 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220428 IS - 2305-5839 (Print) IS - 2305-5847 (Electronic) IS - 2305-5839 (Linking) VI - 9 IP - 20 DP - 2021 Oct TI - MiR-139-5p has an antidepressant-like effect by targeting phosphodiesterase 4D to activate the cAMP/PKA/CREB signaling pathway. PG - 1594 LID - 10.21037/atm-21-5149 [doi] LID - 1594 AB - BACKGROUND: Phosphodiesterase 4D (PDE4D) inhibitor is commonly used to treat depression, but side effects seriously decrease its efficacy. PDE4D was a downstream target mRNA of miR-139-5p. Therefore, we examined the effects of hippocampal miR-139-5p gain- and loss-of-function on depression-like behaviors, the expression level of PDE4D, and hippocampus neurogenesis. METHODS: Bioinformatic analyses were carried out to to screen differential genes. Quantitative real-time polymerase chain reaction (qRT-PCR) and luciferase reporter assay were used to confirm the relationship between miR-139-5p and PDE4D. MiR-139-5p mimics, miR-139-5p inhibitor, or miR-NC were used to explore the function of miR-139-5p in HT-22 cells. We further explored the role of miR-139-5p in vivo using AAV-injection. Elisa, western blotting, and fluorescence in situ hybridization (FISH) were used to detect the expression of miR-139-5p and PDE4D in CRC tissues. RESULTS: Here, we showed that PDE4D messenger RNA (mRNA) was a direct target of microRNA (miR)-139-5p, which was downregulated in a chronic ultra-mild stress (CUMS)-induced depression mouse model. Moreover, in experiments in vitro, miR-139-5p mimic repressed PDE4D expression in HT-22 cells, but promoted phosphorylated cyclic-AMP response element-binding protein (p-CREB) and brain-derived neurotrophic factor (BDNF) expression. Interestingly, adeno-associated virus (AAV)-miR-139-5p downregulated susceptibility to stress-induced depression-like behaviors in mice. AAV-miR-139-5p suppressed PDE4D in mouse hippocampal cells, increasing expression level of cyclic adenosine monophosphate (cAMP), p-CREB, and BDNF, and stimulating mouse hippocampal neurogenesis. CONCLUSIONS: Our findings suggested that miR-139-5p acted like an antidepressant by targeting PDE4D, thereby regulating the cAMP/protein kinase A (PKA)/CREB/BDNF pathway to improve depression. CI - 2021 Annals of Translational Medicine. All rights reserved. FAU - Huang, Peng AU - Huang P AD - South Medical University Affiliated Maternal & Child Health Hospital of Foshan, Foshan, China. FAU - Wei, Songren AU - Wei S AD - Department of Neuropharmacology and Novel Drug Discovery, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China. FAU - Luo, Meng AU - Luo M AD - Center for Bioinformatics, School of Life Science and Technology, Harbin Institute of Technology, Harbin, China. FAU - Tang, Zhuohong AU - Tang Z AD - South Medical University Affiliated Maternal & Child Health Hospital of Foshan, Foshan, China. FAU - Lin, Qingmei AU - Lin Q AD - South Medical University Affiliated Maternal & Child Health Hospital of Foshan, Foshan, China. FAU - Wang, Xing AU - Wang X AD - South Medical University Affiliated Maternal & Child Health Hospital of Foshan, Foshan, China. FAU - Luo, Mi AU - Luo M AD - South Medical University Affiliated Maternal & Child Health Hospital of Foshan, Foshan, China. FAU - He, Yanjun AU - He Y AD - South Medical University Affiliated Maternal & Child Health Hospital of Foshan, Foshan, China. FAU - Wang, Chuan AU - Wang C AD - Department of Biliary Surgery, The First People's Hospital of Foshan, Foshan, China. FAU - Wei, Dezhan AU - Wei D AD - South Medical University Affiliated Maternal & Child Health Hospital of Foshan, Foshan, China. FAU - Xia, Chenglai AU - Xia C AD - South Medical University Affiliated Maternal & Child Health Hospital of Foshan, Foshan, China. AD - School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China. FAU - Xu, Jiangping AU - Xu J AD - Department of Neuropharmacology and Novel Drug Discovery, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China. LA - eng PT - Journal Article PL - China TA - Ann Transl Med JT - Annals of translational medicine JID - 101617978 PMC - PMC8576692 OTO - NOTNLM OT - Depression OT - brain-derived neurotrophic factor (BDNF) OT - cyclic adenosine monophosphate (cAMP) OT - miR-139-5p OT - phosphodiesterase 4D (PDE4D) COIS- Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://dx.doi.org/10.21037/atm-21-5149). The authors have no conflicts of interest to declare. EDAT- 2021/11/19 06:00 MHDA- 2021/11/19 06:01 PMCR- 2021/10/01 CRDT- 2021/11/18 07:02 PHST- 2021/08/31 00:00 [received] PHST- 2021/10/22 00:00 [accepted] PHST- 2021/11/18 07:02 [entrez] PHST- 2021/11/19 06:00 [pubmed] PHST- 2021/11/19 06:01 [medline] PHST- 2021/10/01 00:00 [pmc-release] AID - atm-09-20-1594 [pii] AID - 10.21037/atm-21-5149 [doi] PST - ppublish SO - Ann Transl Med. 2021 Oct;9(20):1594. doi: 10.21037/atm-21-5149.