PMID- 30509037 OWN - NLM STAT- MEDLINE DCOM- 20190328 LR - 20221222 IS - 1509-572X (Electronic) IS - 1509-572X (Linking) VI - 56 IP - 3 DP - 2018 TI - The level of microRNA 21 is upregulated by rapamycin in serum of tuberous sclerosis complex patients and subependymal giant cell astrocytoma (SEGA)-derived cell cultures. PG - 167-174 LID - 33880 [pii] LID - 10.5114/fn.2018.78695 [doi] AB - Tuberous sclerosis complex (TSC) represents a genetic condition, in which the clinical manifestations are caused by the disinhibition of the mammalian target of rapamycin (mTOR) pathway due to mutations in the TSC1 (hamartin) or TSC2 (tuberin) genes. The deregulated mTOR activity leads to multi-site tumors, including subependymal giant cell astrocytoma (SEGA). SEGA is a brain tumor that affects around 15% of TSC patients. The aim of the study was to evaluate miR-21 expression in the serum of two groups of TSC patients: with or without SEGA tumors. We found no differences in the level of miR-21 depending on the presence of SEGA. Next, we studied the influence of prolonged rapamycin administration on miR-21 level in the blood serum of TSC patients (6-12 months of rapamycin) and in primary cultures of SEGA-derived cells treated with rapamycin in vitro. Here we show that rapamycin treatment leads to the upregulation of miR-21 in both patients' serum and in primary SEGA tumor cells in the culture indicating the regulatory relationship between rapamycin treatment and miR-21 expression. FAU - Kuzniewska, Bozena AU - Kuzniewska B FAU - Sadowski, Krzysztof AU - Sadowski K FAU - Urbanska, Katarzyna AU - Urbanska K FAU - Urbanska, Malgorzata AU - Urbanska M FAU - Kotulska, Katarzyna AU - Kotulska K FAU - Liszewska, Ewa AU - Liszewska E FAU - Grajkowska, Wieslawa AU - Grajkowska W FAU - Jozwiak, Sergiusz AU - Jozwiak S FAU - Dziembowska, Magdalena AU - Dziembowska M LA - eng PT - Journal Article PL - Poland TA - Folia Neuropathol JT - Folia neuropathologica JID - 9437431 RN - 0 (Antibiotics, Antineoplastic) RN - 0 (MIRN21 microRNA, human) RN - 0 (MicroRNAs) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Adolescent MH - Antibiotics, Antineoplastic/*therapeutic use MH - Astrocytoma/etiology MH - Child MH - Female MH - Humans MH - Male MH - MicroRNAs/*biosynthesis/*drug effects MH - Sirolimus/*therapeutic use MH - Tuberous Sclerosis/complications/*drug therapy/metabolism MH - Tumor Cells, Cultured MH - Up-Regulation MH - Young Adult OTO - NOTNLM OT - SEGA OT - miR-21 OT - rapamycin OT - tuberous sclerosis EDAT- 2018/12/05 06:00 MHDA- 2019/03/29 06:00 CRDT- 2018/12/05 06:00 PHST- 2018/12/05 06:00 [entrez] PHST- 2018/12/05 06:00 [pubmed] PHST- 2019/03/29 06:00 [medline] AID - 33880 [pii] AID - 10.5114/fn.2018.78695 [doi] PST - ppublish SO - Folia Neuropathol. 2018;56(3):167-174. doi: 10.5114/fn.2018.78695.