PMID- 38305335 OWN - NLM STAT- MEDLINE DCOM- 20240205 LR - 20240307 IS - 1040-8401 (Print) IS - 1040-8401 (Linking) VI - 44 IP - 2 DP - 2024 TI - MicroRNA-99b Regulates Bacillus Calmette-Guerin-Infected Immature Dendritic Cell-Induced CD4+ T Cell Differentiation by Targeting mTOR Signaling. PG - 35-47 LID - 10.1615/CritRevImmunol.2023050312 [doi] AB - This study aimed to elucidate the mechanisms by which microRNA-99b (miR-99b) regulates CD4+ T cell differentiation induced by Bacillus Calmette-Guerin (BCG)-infected immature dendritic cells (imDCs). Levels of miR-99b, interferon-gamma (IFN-gamma), Foxp3, interleukin (IL)-10, IL-17, IL-23, and ROR-gammat were assessed. Effects of miR-99b inhibition and mechanistic target of rapamycin (mTOR) agonist on Th17/Treg cell ratio and cytokine levels (IL-6, IL-17, IL-23) were studied. Expression of mTOR, S6K1, and 4E-BP1 related to miR-99b was analyzed. BCG-infected imDCs led to CD4+ T cell differentiation and altered levels of IFN-gamma, Foxp3, IL-10, miR-99b, IL-17, IL-23, and ROR-gammat. Inhibition of miR-99b increased the Th17/Treg cell ratio in CD4+ T cells co-cultured with BCG-infected imDCs, and this effect was further enhanced by the mTOR agonist. Additionally, the miR-99b inhibitor elevated the levels of IL-6, IL-17, and IL-23 when CD4+ T cells were co-cultured with BCG-infected imDCs, and the mTOR agonist further amplified this increase. Notably, miR-99b negatively regulated mTOR signaling, as the miR-99b inhibitor upregulated the expression levels of mTOR, S6K1, and 4E-BP1 while decreasing miR-99b. It was concluded that miR-99b modulates CD4+ T cell differentiation via mTOR pathway in response to BCG-infected im-DCs. Inhibiting miR-99b affects Th17/Treg ratio and pro-inflammatory cytokines, potentially impacting tuberculosis immunotherapies. FAU - Zhen, Libo AU - Zhen L AD - Department of Tuberculosis, Affiliated Hangzhou Chest Hospital, Zhejiang University School of Medicine, Hangzhou 310030, China. FAU - Chen, Yuanyuan AU - Chen Y AD - Tuberculosis Laboratory, Affiliated Hangzhou Chest Hospital, Zhejiang University School of Medicine, Hangzhou 310030, China. FAU - Gao, Juwei AU - Gao J AD - Department of Oncology, The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou 310061, China. FAU - Li, Boying AU - Li B AD - Department of Tuberculosis, Affiliated Hangzhou Chest Hospital, Zhejiang University School of Medicine, Hangzhou 310030, China. FAU - Jia, Yangmin AU - Jia Y AD - Department of Occupational Medicine, Affiliated Hangzhou Chest Hospital, Zhejiang University School of Medicine, Hangzhou 310030, China. LA - eng PT - Journal Article PL - United States TA - Crit Rev Immunol JT - Critical reviews in immunology JID - 8914819 RN - 0 (BCG Vaccine) RN - 0 (Cytokines) RN - 0 (Forkhead Transcription Factors) RN - 82115-62-6 (Interferon-gamma) RN - 0 (Interleukin-17) RN - 0 (Interleukin-23) RN - 0 (Interleukin-6) RN - 0 (MicroRNAs) RN - 0 (Nuclear Receptor Subfamily 1, Group F, Member 3) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) SB - IM MH - Humans MH - BCG Vaccine MH - CD4-Positive T-Lymphocytes MH - Cell Differentiation MH - Cytokines/metabolism MH - Dendritic Cells MH - Forkhead Transcription Factors MH - Interferon-gamma MH - Interleukin-17 MH - Interleukin-23 MH - Interleukin-6 MH - *MicroRNAs/genetics MH - *Mycobacterium bovis/metabolism MH - Nuclear Receptor Subfamily 1, Group F, Member 3/genetics MH - TOR Serine-Threonine Kinases/metabolism EDAT- 2024/02/02 12:42 MHDA- 2024/02/05 06:43 CRDT- 2024/02/02 09:27 PHST- 2024/02/05 06:43 [medline] PHST- 2024/02/02 12:42 [pubmed] PHST- 2024/02/02 09:27 [entrez] AID - 282f3b6c1c729c6a,14bdc2ad74746b8b [pii] AID - 10.1615/CritRevImmunol.2023050312 [doi] PST - ppublish SO - Crit Rev Immunol. 2024;44(2):35-47. doi: 10.1615/CritRevImmunol.2023050312.