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Luo Z, Yuan Y, Li L, Xie D, Liu C, Li T, Guo Z, Hao K, Li Y, Tian H. Facile Synthesis of High Molecular Weight Poly(ethylene glycol)- b-poly(amino acid)s by Relay Polymerization. Biomacromolecules 2024; 25:1096-1107. [PMID: 38216512 DOI: 10.1021/acs.biomac.3c01128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
Poly(amino acid)s (PAAs) are one kind of favorable biopolymer that can be used as a drug or gene carrier. However, conventional ring-opening polymerization of PAAs is slow and needs a strict anhydrous environment with an anhydrous reagent as well as the product without enough high molecular weight (Mn), which limits the expanding of PAAs' application. Herein, we took BLG-NCA as the monomer to quickly synthesize one kind of high Mn amphiphilic copolymer, poly(ethylene glycol)-b-poly(γ-benzyl-l-glutamic acid) (PEG-PBLG), by relay polymerization with a simple one-pot method within 3 h in mild conditions (open air, moisture insensitive). In the polymerization process, ring-opening polymerization-induced self-assembly in sodium bicarbonate aqueous solution first occurred to obtain low Mn PEG-PBLG seeds without purification. Then γ-benzyl-l-glutamate N-carboxyanhydride (BLG-NCA) dichloromethane solution was added into PEG-PBLG seeds directly and stirred vigorously to form am emulsion; during this process, the amphiphilic PEG-PBLG seeds will anchor on the interface of DCM and water to ensure the concentration of α-helix rigid PBLG in DCM to maintain the following relay polymerization. Then, high Mn PEG-PBLG was obtained in mild conditions in one pot. We found that the α-helix rigid structure was essential for relay polymerization by studying the synthetic speed of amphiphilic copolymer with different secondary structures. MOE simulation results showed that PBLG and BLG-NCA tended to form a double hydrogen bond, which was beneficial to relay polymerization because of higher local concentrations that can produce more double hydrogen bonds. Our strategy can quickly obtain high Mn PEG-PBLG (224.9 KDa) within 3 h from PEG-NH2 and BLG-NCA in one pot and did not need an extra initiator. After deprotection, the poly(ethylene glycol)-b-poly(l-glutamate acid) (PEG-PGA) with high Mn as a second product can be used as an excellent antitumor drug carrier. The high Mn PEG-PGA can achieve an encapsulation rate of 86.7% and a drug loading rate of 47.3%, which is twice that of the low Mn PEG-PGA. As a result, the synthesis of PEG-PBLG by relay polymerization simplified the process of PEG-PAA polymerization and increased the Mn. In addition, this method opened a way to obtain other kinds of high Mn PEG-PBLG values in the future.
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Affiliation(s)
- Zhimin Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
| | - Yunan Yuan
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Ling Li
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
| | - Dayang Xie
- School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
| | - Chong Liu
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
| | - Tong Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Zhaopei Guo
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Kai Hao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yanhui Li
- School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
| | - Huayu Tian
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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Stanisławiak-Rudowicz J, Karbownik A, Szkutnik-Fiedler D, Otto F, Grabowski T, Wolc A, Grześkowiak E, Szałek E. Bidirectional pharmacokinetic drug interactions between olaparib and metformin. Cancer Chemother Pharmacol 2024; 93:79-88. [PMID: 37815561 PMCID: PMC10796410 DOI: 10.1007/s00280-023-04591-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 09/10/2023] [Indexed: 10/11/2023]
Abstract
OBJECTIVE Olaparib is a PARP (poly-ADP-ribose polymerase) inhibitor used for maintenance therapy in BRCA-mutated cancers. Metformin is a first-choice drug used in the treatment of type 2 diabetes. Both drugs are commonly co-administered to oncologic patients with add-on type 2 diabetes mellitus. Olaparib is metabolized by the CYP3A4 enzyme, which may be inhibited by metformin through the Pregnane X Receptor. In vitro studies have shown that olaparib inhibits the following metformin transporters: OCT1, MATE1, and MATE2K. The aim of the study was to assess the influence of 'the perpetrator drug' on the pharmacokinetic (PK) parameters of 'the victim drug' after a single dose. To evaluate the effect, the AUC0→∞ (area under the curve) ratio was determined (the ratio between AUC0→∞ in the presence of the perpetrator and AUC0→∞ without the presence of the perpetrator). METHODS Male Wistar rats were assigned to three groups (eight animals in each group), which were orally administered: metformin and olaparib (IMET+OLA), vehiculum with metformin (IIMET), and vehiculum with olaparib (IIIOLA). Blood samples were collected after 24 h. HPLC was applied to measure the concentrations of olaparib and metformin. The PK parameters were calculated in a non-compartmental model. RESULTS Metformin did not affect the olaparib PK parameters. The AUC0→∞ IMET+OLA/IIIOLA ratio was 0.99. Olaparib significantly increased the metformin Cmax (by 177.8%), AUC0→t (by 159.8%), and AUC0→∞ (by 74.1%). The AUC0→∞ IMET+OLA/IIMET ratio was 1.74. CONCLUSIONS A single dose of metformin did not affect the PK parameters of olaparib, nor did it inhibit the olaparib metabolism, but olaparib significantly changed the metformin pharmacokinetics, which may be of clinical importance.
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Affiliation(s)
- Joanna Stanisławiak-Rudowicz
- Department of Clinical Pharmacy and Biopharmacy, Poznań University of Medical Sciences, Rokietnicka 3, 60-806, Poznań, Poland.
- Poznań University Clinical Hospital, Szamarzewskiego 84/86, 60-569, Poznań, Poland.
| | - Agnieszka Karbownik
- Department of Clinical Pharmacy and Biopharmacy, Poznań University of Medical Sciences, Rokietnicka 3, 60-806, Poznań, Poland
| | - Danuta Szkutnik-Fiedler
- Department of Clinical Pharmacy and Biopharmacy, Poznań University of Medical Sciences, Rokietnicka 3, 60-806, Poznań, Poland
| | - Filip Otto
- Department of Clinical Pharmacy and Biopharmacy, Poznań University of Medical Sciences, Rokietnicka 3, 60-806, Poznań, Poland
| | - Tomasz Grabowski
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, M. Skłodowskiej-Curie 3a, 80-210, Gdańsk, Poland
| | - Anna Wolc
- Department of Animal Science, Iowa State University, 239E Kildee Hall, Ames, IA, 50011, USA
- Hy-Line International, 2583 240th Street, Dallas Center, IA, 50063, USA
| | - Edmund Grześkowiak
- Department of Clinical Pharmacy and Biopharmacy, Poznań University of Medical Sciences, Rokietnicka 3, 60-806, Poznań, Poland
| | - Edyta Szałek
- Department of Clinical Pharmacy and Biopharmacy, Poznań University of Medical Sciences, Rokietnicka 3, 60-806, Poznań, Poland
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Russo M, Moccia S, Luongo D, Russo GL. Senolytic Flavonoids Enhance Type-I and Type-II Cell Death in Human Radioresistant Colon Cancer Cells through AMPK/MAPK Pathway. Cancers (Basel) 2023; 15:cancers15092660. [PMID: 37174126 PMCID: PMC10177236 DOI: 10.3390/cancers15092660] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/04/2023] [Accepted: 05/05/2023] [Indexed: 05/15/2023] Open
Abstract
Resistance to cancer therapies remains a clinical challenge and an unsolved problem. In a previous study, we characterized a new colon cancer cell line, namely HT500, derived from human HT29 cells and resistant to clinically relevant levels of ionizing radiation (IR). Here, we explored the effects of two natural flavonoids, quercetin (Q) and fisetin (F), well-known senolytic agents that inhibit genotoxic stress by selectively removing senescent cells. We hypothesized that the biochemical mechanisms responsible for the radiosensitising effects of these natural senolytics could intercept multiple biochemical pathways of signal transduction correlated to cell death resistance. Radioresistant HT500 cells modulate autophagic flux differently than HT29 cells and secrete pro-inflammatory cytokines (IL-8), commonly associated with senescence-related secretory phenotypes (SASP). Q and F inhibit PI3K/AKT and ERK pathways, which promote p16INK4 stability and resistance to apoptosis, but they also activate AMPK and ULK kinases in response to autophagic stress at an early stage. In summary, the combination of natural senolytics and IR activates two forms of cell death: apoptosis correlated to the inhibition of ERKs and lethal autophagy dependent on AMPK kinase. Our study confirms that senescence and autophagy partially overlap, share common modulatory pathways, and reveal how senolytic flavonoids can play an important role in these processes.
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Affiliation(s)
- Maria Russo
- Institute of Food Sciences, National Research Council, 83100 Avellino, Italy
| | - Stefania Moccia
- Institute of Food Sciences, National Research Council, 83100 Avellino, Italy
| | - Diomira Luongo
- Institute of Food Sciences, National Research Council, 83100 Avellino, Italy
| | - Gian Luigi Russo
- Institute of Food Sciences, National Research Council, 83100 Avellino, Italy
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