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Osiriphan M, Insukhin C, Anuchapreeda S, Khamphikham P, Duangmano S. MicroRNA‑223 overexpression suppresses protein kinase C ε expression in human leukemia stem cell‑like KG‑1a cells. Mol Clin Oncol 2024; 21:48. [PMID: 38881704 PMCID: PMC11176719 DOI: 10.3892/mco.2024.2746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 05/01/2024] [Indexed: 06/18/2024] Open
Abstract
MicroRNA-223 (miR-223) is dysregulated in various cancer types, including acute myeloid leukemia (AML). Despite this, there has been a lack of studies exploring the role of miR-223 in leukemic stem cells, particularly those involved in drug resistance, a major cause of chemotherapy failure in AML. The present study aimed to elucidate the impact of miR-223 on drug resistance in the leukemic stem-cell line, KG-1a. Two AML cell lines, KG-1 and KG-1a, differing in the proportion of CD34+CD38- cells, were assessed for doxorubicin (DOX) sensitivity using the Cell Counting Kit-8 assay. The expression levels of miR-223 and protein kinase C ε (PKCε) were evaluated via reverse transcription-quantitative PCR and western blot analysis. The association between miR-223 and its target, PKCε, was confirmed by luciferase activity assay. The effects of miR-223 overexpression and PKCε inhibition were also evaluated in KG-1a cells using miR-223 mimic and small interfering (si)RNA transfection, respectively. Daunorubicin was then used to assess drug sensitivity in the siRNA-transfected KG-1a cells. Compared with KG-1 cells, KG-1a cells displayed greater resistance to DOX, and had increased PKCε levels and decreased miR-223 expression. Overexpression of miR-223 led to PKCε protein downregulation in KG-1a cells, which was further confirmed by a luciferase assay demonstrating miR-223 targeting of PKCε. However, despite these effects, miR-223 overexpression and PKCε inhibition did not change drug sensitivity in KG-1a cells compared with negative control cells. In summary, the present study demonstrated that miR-223 could target and silence PKCε expression in KG-1a cells; however, the chemoresistance of KG-1a cells to anthracycline drugs may not be directly associated with the low expression of miR-223.
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Affiliation(s)
- Mallika Osiriphan
- Division of Clinical Microscopy, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
- Master's Degree Program in Medical Technology (under the Chiang Mai University Presidential Scholarship), Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
| | - Charapat Insukhin
- Division of Clinical Microscopy, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
| | - Songyot Anuchapreeda
- Division of Clinical Microscopy, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
- Cancer Research Unit of Associated Medical Sciences, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
- Hematology and Health Technology Research Center, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
| | - Pinyaphat Khamphikham
- Division of Clinical Microscopy, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
- Hematology and Health Technology Research Center, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
| | - Suwit Duangmano
- Division of Clinical Microscopy, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
- Cancer Research Unit of Associated Medical Sciences, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
- Hematology and Health Technology Research Center, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Mueang Chiang Mai, Chiang Mai 50200, Thailand
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Doxorubicin-Loaded Polymeric Micelles Conjugated with CKR- and EVQ-FLT3 Peptides for Cytotoxicity in Leukemic Stem Cells. Pharmaceutics 2022; 14:pharmaceutics14102115. [PMID: 36297550 PMCID: PMC9610626 DOI: 10.3390/pharmaceutics14102115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 09/13/2022] [Accepted: 09/29/2022] [Indexed: 11/25/2022] Open
Abstract
Doxorubicin (Dox) is the standard chemotherapeutic agent for acute myeloblastic leukemia (AML) treatment. However, 40% of Dox-treated AML cases relapsed due to the presence of leukemic stem cells (LSCs). Thus, poloxamer 407 and CKR- and EVQ-FLT3 peptides were used to formulate Dox-micelles (DMs) and DM conjugated with peptides (CKR and EVQ) for improving AML-LSC treatment. Results indicated that DMs with a weight ratio of Dox to P407 of 1:200 had a particle size of 23.3 ± 1.3 nm with a high percentage of Dox entrapment. They were able to prolong drug release and maintain physicochemical stability. Following effective DM preparation, P407 was modified and conjugated with FLT3 peptides, CKR and EVQ to formulate DM-CKR, DM-EVQ, and DM-CKR+DM-EVQ. Freshly synthesized DMs displaying FLT3 peptides showed particle sizes smaller than 50 nm and a high drug entrapment level, comparable with DMs. DM-CKR+DM-EVQ was considerably more toxic to KG-1a (AML LSC-like cell model) than Dox-HCl. These FLT3-targeted DMs could increase drug uptake and induce apoptosis induction. Due to an increase in micelle-LSC binding and uptake, DMs displaying both peptides tended to improve the potency of Dox compared to a single peptide-coupled micelle.
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Morikawa T. Bio-Functional Natural Products in Edible Resources for Human Health and Beauty. Molecules 2022; 27:molecules27165060. [PMID: 36014313 PMCID: PMC9413208 DOI: 10.3390/molecules27165060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 08/04/2022] [Indexed: 11/16/2022] Open
Affiliation(s)
- Toshio Morikawa
- Pharmaceutical Research and Technology Institute, Kindai University, 3-4-1 Kowakae, Higashiosaka 577-8502, Osaka, Japan
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