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Sedush NG, Kadina YA, Razuvaeva EV, Puchkov AA, Shirokova EM, Gomzyak VI, Kalinin KT, Kulebyakina AI, Chvalun SN. Nanoformulations of Drugs Based on Biodegradable Lactide Copolymers with Various Molecular Structures and Architectures. NANOBIOTECHNOLOGY REPORTS 2021. [PMCID: PMC8431958 DOI: 10.1134/s2635167621040121] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Modern pharmaceutics are actively developing towards the design of targeted drugs. The development of selectively acting formulations requires the creation of smart delivery systems based on carriers that would first find the target cells and enter them and then release the active substance locally. Nanoparticles of biocompatible and biodegradable polymers can be effectively used as such carriers. Flexible regulation of the molecular structure and architecture of polymers, as well as the modification of nanoparticles with vector molecules, allows one to construct carrier particles for the development of nanoformulations for active agents of various nature. This review presents the main approaches to the design of nanoformulations for targeted delivery, describes the methods for the preparation and study of nanoparticles based on hydrophobic and amphiphilic biodegradable lactide polymers, and discusses the effect of the molecular structure and preparation conditions on the characteristics of nanoparticles in detail. Some results of research in this area of the Kurchatov complex of NBIСS nature-like technologies are also presented.
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Affiliation(s)
- N. G. Sedush
- Kurchatov Institute National Research Center, 123098 Moscow, Russia
| | - Y. A. Kadina
- Kurchatov Institute National Research Center, 123098 Moscow, Russia
| | - E. V. Razuvaeva
- Kurchatov Institute National Research Center, 123098 Moscow, Russia
| | - A. A. Puchkov
- Kurchatov Institute National Research Center, 123098 Moscow, Russia
| | - E. M. Shirokova
- Kurchatov Institute National Research Center, 123098 Moscow, Russia
| | - V. I. Gomzyak
- Kurchatov Institute National Research Center, 123098 Moscow, Russia
| | - K. T. Kalinin
- Kurchatov Institute National Research Center, 123098 Moscow, Russia
| | | | - S. N. Chvalun
- Kurchatov Institute National Research Center, 123098 Moscow, Russia
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Garner J, Skidmore S, Hadar J, Park H, Park K, Kuk Jhon Y, Qin B, Wang Y. Analysis of semi-solvent effects for PLGA polymers. Int J Pharm 2021; 602:120627. [PMID: 33915188 DOI: 10.1016/j.ijpharm.2021.120627] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/14/2021] [Accepted: 04/17/2021] [Indexed: 10/01/2022]
Abstract
Poly(lactide-co-glycolide) polymers (PLGAs) have been used in many clinical formulations of injectable, long-acting formulations. Frequently, PLGAs having different lactide:glycolide (L:G) ratios, molecular weights (MWs), end-groups, and molecular structures have been used individually or in mixtures. To understand the properties of existing formulations made of PLGAs and to develop new formulations, understanding PLGA properties is essential. Yet, the separation of individual PLGA components from a mixture and their characterization has been challenging due to an incomplete understanding of PLGAs. This study focuses on separating PLGAs based on their molecular properties, such as L:G ratio, molecular weight, and comonomer sequence. The separation of PLGAs exploits the use of semi-solvents that dissolve only PLGAs having lactide contents (L%) above a certain threshold. More semi-solvents have been identified that show a specific transition L% between 50 and 100%. The mechanism study of semi-solvents indicates that semi-solvents, in general, prefer PLGAs with relatively higher L%, lower molecular weight, and higher G-L sequences as opposed to G-G sequences. The examination of a series of esters and ketones indicates that a solvent with lower molar volume is more effective as a semi-solvent. At a similar molar volume, esters are more effective than ketones in dissolving PLGAs with the same L:G ratio. The ability to separate and identify PLGA fractions allows better characterization of existing formulations and higher flexibility in designing new injectable, long-acting PLGA formulations.
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Affiliation(s)
| | | | | | | | - Kinam Park
- Akina, Inc., West Lafayette, IN 47906, USA; Purdue University, Biomedical Engineering and Pharmaceutics, West Lafayette, IN 47907, USA.
| | - Young Kuk Jhon
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Pharmaceutical Quality, Silver Spring, MD 20993, USA
| | - Bin Qin
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Generic Drugs, Silver Spring, MD 20993, USA
| | - Yan Wang
- Food and Drug Administration, Center for Drug Evaluation and Research, Office of Generic Drugs, Silver Spring, MD 20993, USA
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Kalinin KT, Sedush NG, Dmitryakov PV, Chvalun SN. Kinetics of D,L-Lactide Polymerization Initiated with Zirconium Acetylacetonate. ChemistryOpen 2020; 9:1027-1032. [PMID: 33083201 PMCID: PMC7552909 DOI: 10.1002/open.202000101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 08/26/2020] [Indexed: 11/07/2022] Open
Abstract
The kinetic of D,L-lactide polymerization in presence of biocompatible zirconium acetylacetonate initiator was studied by differential scanning calorimetry in isothermal mode at various temperatures and initiator concentrations. The enthalpy of D,L-lactide polymerization measured directly in DSC cell was found to be ΔH=-17.8±1.4 kJ mol-1. Kinetic curves of D,L-lactide polymerization and propagation rate constants were determined for polymerization with zirconium acetylacetonate at concentrations of 250-1000 ppm and temperature of 160-220 °C. Using model or reversible polymerization the following kinetic and thermodynamic parameters were calculated: activation energy Ea =44.51±5.35 kJ mol-1, preexponential constant lnA=15.47±1.38, entropy of polymerization ΔS=-25.14 J mol-1 K-1. The effect of reaction conditions on the molecular weight of poly(D,L-lactide) was shown.
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Morokov ES, Demina VA, Sedush NG, Kalinin KT, Khramtsova EA, Dmitryakov PV, Bakirov AV, Grigoriev TE, Levin VM, Chvalun SN. Noninvasive high-frequency acoustic microscopy for 3D visualization of microstructure and estimation of elastic properties during hydrolytic degradation of lactide and ε-caprolactone polymers. Acta Biomater 2020; 109:61-72. [PMID: 32294555 DOI: 10.1016/j.actbio.2020.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 03/31/2020] [Accepted: 04/03/2020] [Indexed: 10/24/2022]
Abstract
The monitoring of degradation processes' kinetics in polymers is one of the attractive possibilities of ultrasound technique applications that provide non-destructive imaging of polymers' internal microstructure and measurements of elastic properties. In this work, biodegradable polymers and copolymers based on L,L-lactide, D,L-lactide and ε-caprolactone have been studied at different stages of hydrolysis at 37 °C by high-frequency (100 and 200 MHz) ultrasound. The acoustic microscopy technique has been developed to reveal changes in the internal microstructure and bulk sound speed in polymer samples over a hydrolysis period of 25 weeks. Ultrasound imaging provides visualization of amorphous and crystalline phases, internal imperfections, variation in packing density, and other microstructural features. Acoustic images demonstrate nucleation, growth, and the changes in internal inhomogeneities in polymers during degradation accompanied by a decrease in the polymers' molecular weight. We associate the changes in the elastic properties (the speed of a longitudinal wave) with crystallinity variations in polymers during hydrothermal aging. The results of the ultrasound investigations are supplemented by gel permeation chromatography, differential scanning calorimetry, and wide-angle X-ray spectroscopy. STATEMENT OF SIGNIFICANCE: Monitoring the kinetics of degradation processes in polymers is one of the attractive possibilities of applying ultrasound techniques that provide non-destructive imaging of the polymers' internal microstructure and measurements of elastic properties. In this work, visualization of nucleation, growth, and evolution of internal inhomogeneities in the volume of polymers and variation of values of speed of longitudinal and transverse sound waves during hydrolysis are compared with measurements of molecular weight, density, data of DSC curves, and X-ray scattering analysis. We discuss several common phenomena that occur in the volume of poly(L-lactide) and poly(D,L-lactide) over the degradation process as well as improvement of elastic properties of the poly(ε -caprolactone) and poly(L-lactide-co-caprolactone) during hydrothermal aging.
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de Jongh PA, Paul PK, Khoshdel E, Wilson P, Kempe K, Haddleton DM. High T g poly(ester amide)s by melt polycondensation of monomers from renewable resources; citric acid, D-glucono-δ-lactone and amino acids: A DSC study. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.06.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Sedush NG, Izraylit VV, Mailyan AK, Savinov DV, Kiryukhin YI, Chvalun SN. Kinetics of ring-opening polymerization of d , l -lactide catalyzed by functional Zn–guanidine complex with biphenyl-4-methanol activator. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.05.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Efimova AA, Sybachin AV, Chvalun SN, Kulebyakina AI, Kozlova EV, Yaroslavov AA. Biodegradable multi-liposomal containers. POLYMER SCIENCE SERIES B 2015. [DOI: 10.1134/s1560090415020050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sedush NG, Chvalun SN. Kinetics and thermodynamics of l-lactide polymerization studied by differential scanning calorimetry. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2014.11.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Khodabakhshi K, Ghaeni MHHA, Ahmadi S. In depth investigation of the accelerated ring opening polymerization of L-lactide. POLYMER SCIENCE SERIES B 2014. [DOI: 10.1134/s156009041501008x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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