1
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Lamb DR, Greenfield A, Thangaraju K, Setua S, Eiker G, Wang Q, Vahedi A, Khan MA, Yahya A, Cabrales P, Palmer AF, Buehler PW. The Molecular Size of Bioengineered Oxygen Carriers Determines Tissue Oxygenation in a Hypercholesterolemia Guinea Pig Model of Hemorrhagic Shock and Resuscitation. Mol Pharm 2023; 20:5739-5752. [PMID: 37843033 DOI: 10.1021/acs.molpharmaceut.3c00611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
Polymerized human hemoglobin (PolyhHb) has shown promise in preclinical hemorrhagic shock settings. Different synthetic and purification schemes can control the size of PolyhHbs, yet research is lacking on the impact of polymerized hemoglobin size on tissue oxygenation following hemorrhage and resuscitation in specialized animal models that challenge their resuscitative capabilities. Pre-existing conditions that compromise the vasculature and end organs, such as the liver, may limit the effectiveness of resuscitation and exacerbate the toxicity of these molecules, which is an important but minimally explored therapeutic dimension. In this study, we compared the effective oxygen delivery of intermediate molecular weight PolyhHb (PolyhHb-B3; 500-750 kDa) to high molecular weight PolyhHb (PolyhHb-B4; 750 kDa-0.2 μm) for resuscitative effectiveness in guinea pig models subjected to hemorrhagic shock. We evaluated how the size of PolyhHb impacts hemodynamics and tissue oxygenation in normal guinea pigs and guinea pigs on an atherogenic diet. We observed that while PolyhHb-B3 and -B4 equivalently restore hemodynamic parameters of normal-dieted guinea pigs, high-fat-dieted guinea pigs resuscitated with PolyhHb-B4 have lower mean arterial pressures, impaired tissue oxygenation, and higher plasma lactate levels than those receiving PolyhHb-B3. We characterized the plasma of these animals following resuscitation and found that despite similar oxygen delivery kinetics, circulating PolyhHb-B3 and -B4 demonstrated a size-dependent increase in the plasma viscosity, consistent with impaired perfusion in the PolyhHb-B4 transfusion group. We conclude that intermediate-sized PolyhHbs (such as -B3) are ideal for further research given the effective resuscitation of hemorrhagic shock based on tissue oxygenation in hypercholesterolemic guinea pigs.
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Affiliation(s)
- Derek R Lamb
- Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, University of Maryland School of Medicine, HSF III, 670 West Baltimore St., Baltimore, Maryland 21202, United States
| | - Alisyn Greenfield
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Kiruphagaran Thangaraju
- Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, University of Maryland School of Medicine, HSF III, 670 West Baltimore St., Baltimore, Maryland 21202, United States
| | - Saini Setua
- Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, University of Maryland School of Medicine, HSF III, 670 West Baltimore St., Baltimore, Maryland 21202, United States
| | - Gena Eiker
- Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, University of Maryland School of Medicine, HSF III, 670 West Baltimore St., Baltimore, Maryland 21202, United States
| | - Qihong Wang
- Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, University of Maryland School of Medicine, HSF III, 670 West Baltimore St., Baltimore, Maryland 21202, United States
| | - Amid Vahedi
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Mohd Asim Khan
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Ahmad Yahya
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Pedro Cabrales
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093-0412, United States
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Paul W Buehler
- Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, University of Maryland School of Medicine, HSF III, 670 West Baltimore St., Baltimore, Maryland 21202, United States
- Department of Pathology, University of Maryland School of Medicine, 10 S Pine St # 700A, Baltimore, Maryland 21201, United States
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2
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Pacheco MO, Lutz HM, Armada J, Davies N, Gerzenshtein IK, Cakley AS, Spiess BD, Stoppel WL. Silk Fibroin Particles as Carriers in the Development of Hemoglobin-Based Oxygen Carriers. ADVANCED NANOBIOMED RESEARCH 2023; 3:2300019. [PMID: 38708087 PMCID: PMC11068031 DOI: 10.1002/anbr.202300019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2024] Open
Abstract
Oxygen therapeutics have a range of applications in transfusion medicine and disease treatment. Synthetic molecules and all-natural or semi-synthetic hemoglobin-based oxygen carriers (HBOCs) have seen success as potential circulating oxygen carriers. However, many early HBOC products stalled in development due to side effects from excess hemoglobin in the blood stream and hemoglobin entering the tissue. To overcome these issues, research has focused on increasing the molecular diameter of hemoglobin by polymerizing hemoglobin molecules or encapsulating hemoglobin in liposomal carriers. This work leverages the properties of silk fibroin, a cytocompatible and non-thrombogenic biopolymer, known to entrap protein-based cargo, to engineer a fully protein-based oxygen carrier. Herein, an all-aqueous solvent evaporation technique was used to form silk particles via phase separation from a bulk polyvinyl alcohol phase (PVA). Particles size was tuned, and particles were formed with and without hemoglobin. The encapsulation efficiency and ferrous state of hemoglobin were analyzed, resulting in 60% encapsulation efficiency and a maximum of 20% ferric hemoglobin, yielding 100 µg/mL active hemoglobin in certain sfHBOC formulations. The system did not elicit a strong inflammation response in vitro, demonstrating the potential for this particle system to serve as an injectable HBOC.
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Affiliation(s)
- Marisa O Pacheco
- Department of Chemical Engineering, University of Florida, Gainesville FL
| | - Henry M Lutz
- Department of Chemical Engineering, University of Florida, Gainesville FL
| | - Jostin Armada
- Department of Chemical Engineering, University of Florida, Gainesville FL
| | - Nickolas Davies
- Department of Anesthesiology, College of Medicine, University of Florida, Gainesville FL
| | | | - Alaura S Cakley
- Department of Chemical Engineering, University of Florida, Gainesville FL
| | - Bruce D Spiess
- Department of Anesthesiology, College of Medicine, University of Florida, Gainesville FL
| | - Whitney L Stoppel
- Department of Chemical Engineering, University of Florida, Gainesville FL
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville FL
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3
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Chen N, Belcher DA, Savla C, Palmer AF, Berthiaume F. Biocompatibility of the oxygen carrier polymerized human hemoglobin towards HepG2/C3A cells. Heliyon 2023; 9:e15878. [PMID: 37215914 PMCID: PMC10192743 DOI: 10.1016/j.heliyon.2023.e15878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/24/2023] Open
Abstract
Hemoglobin (Hb) based oxygen carriers (HBOCs) are designed to minimize the toxicity of extracellular Hb, while preserving its high oxygen-carrying capacity for oxygen delivery to cells. Polymerized human Hb (PolyHb) is a novel type of nanosized HBOC synthesized via glutaraldehyde-mediated crosslinking of free Hb, and which preserves the predominant quaternary state during the crosslinking reaction (low oxygen affinity tense (T) quaternary state PolyHb is synthesized at 0% Hb oxygen saturation, and high oxygen affinity relaxed (R) quaternary state PolyHb is synthesized at 100% Hb oxygen saturation). Major potential applications for PolyHbs, and HBOCs in general, include oxygenation of bioreactor systems containing large liver cell masses, and ex-vivo perfusion preservation of explanted liver grafts. The toxicity of these compounds toward liver cells must be evaluated before testing their use in these complex systems for oxygen delivery. Herein, we characterized the effect of PolyHbs on the hepatoma cell line HepG2/C3A, used as a model hepatocyte and as a cell line used in some investigational bioartificial liver support devices. HepG2/C3A cells were incubated in cell culture media containing PolyHbs or unmodified Hb at concentrations up to 50 mg/mL and for up to 6 days. PolyHbs were well tolerated at a dose of 10 mg/mL, with no significant decrease in cell viability; however, proliferation was inhibited as much as 10-fold after 6 days of exposure at 50 mg/mL. Secretion of albumin, and urea, as well as glucose and ammonia removal were measured in presence of 10 mg/mL of PolyHbs or unmodified Hb. In addition, methoxy- and ethoxy-resorufin deacetylase (MROD and EROD) activities, which reflect cytochrome P450 metabolism, were measured. R-state PolyHb displayed improved or intact activity in 3 out of 7 functions compared to unmodified Hb. T-state PolyHb displayed improved or intact activity in 4 out of 7 functions compared to unmodified Hb. Thus, PolyHbs, both in the R-state and T-state, are safer to use at a concentration of 10 mg/mL as compared to unmodified Hb in static culture liver-related applications.
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Affiliation(s)
- Nuozhou Chen
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ, USA
| | - Donald A. Belcher
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
| | - Chintan Savla
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
| | - Andre F. Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
| | - Francois Berthiaume
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ, USA
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4
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Greenfield A, Lamb DR, Gu X, Thangaraju K, Setua S, Yahya A, Vahedi A, Khan MA, Wang Q, Buehler PW, Palmer AF. Biophysical Analysis and Preclinical Pharmacokinetics-Pharmacodynamics of Tangential Flow Filtration Fractionated Polymerized Human Hemoglobin as a Red Blood Cell Substitute. Biomacromolecules 2023; 24:1855-1870. [PMID: 36877888 DOI: 10.1021/acs.biomac.3c00051] [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: 03/08/2023]
Abstract
Red blood cell (RBC) substitutes tested in late-phase clinical trials contained low-molecular-weight hemoglobin species (<500 kDa), resulting in vasoconstriction, hypertension, and oxidative tissue injury; therefore, contributing to poor clinical outcomes. This work aims to improve the safety profile of the RBC substitute, polymerized human hemoglobin (PolyhHb), via in vitro and in vivo screening of PolyhHb fractionated into four molecular weight brackets (50-300 kDa [PolyhHb-B1]; 100-500 kDa [PolyhHb-B2]; 500-750 kDa [PolyhHb-B3]; and 750 kDa to 0.2 μm [PolyhHb-B4]) using a two-stage tangential flow filtration purification process. Analysis showed that PolyhHb's oxygen affinity, and haptoglobin binding kinetics decreased with increasing bracket size. A 25% blood-for-PolyhHb exchange transfusion guinea pig model suggests that hypertension and tissue extravasation decreased with increasing bracket size. PolyhHb-B3 demonstrated extended circulatory pharmacokinetics, no renal tissue distribution, no aberrant blood pressure, or cardiac conduction effects, and may therefore be appropriate material for further evaluation.
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Affiliation(s)
- Alisyn Greenfield
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Derek R Lamb
- The Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, The University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Xiangming Gu
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Kiruphagaran Thangaraju
- The Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, The University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Saini Setua
- The Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, The University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Ahmad Yahya
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Amid Vahedi
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Mohd Asim Khan
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Qihong Wang
- The Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, The University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Paul W Buehler
- The Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, The University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
- Department of Pathology, The University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, Ohio 43210, United States
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5
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Pacheco MO, Lutz HM, Armada J, Davies N, Gerzenshtein IK, Cakley AS, Spiess BD, Stoppel WL. Silk Fibroin Particles as Carriers in the Development of All-Natural Hemoglobin-Based Oxygen Carriers (HBOCs). BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.01.530637. [PMID: 36909572 PMCID: PMC10002772 DOI: 10.1101/2023.03.01.530637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
Oxygen therapeutics have a range of applications in transfusion medicine and disease treatment. Synthetic molecules and all-natural or semi-synthetic hemoglobin-based oxygen carriers (HBOCs) have seen success as potential circulating oxygen carriers. However, many early HBOC products were removed from the market due to side effects from excess hemoglobin in the blood stream and hemoglobin entering the tissue. To overcome these issues, research has focused on increasing the molecular diameter of hemoglobin by polymerizing hemoglobin molecules or encapsulating hemoglobin in liposomal carriers, where immune responses and circulation times remain a challenge. This work looks to leverage the properties of silk fibroin, a cytocompatible and non-thrombogenic biopolymer, known to entrap protein-based cargo, to engineer a silk fibroin-hemoglobin-based oxygen carrier (sfHBOC). Herein, an all-aqueous solvent evaporation technique was used to form silk fibroin particles with and without hemoglobin to tailor the formulation for specific particle sizes. The encapsulation efficiency and ferrous state of hemoglobin were analyzed, resulting in 60% encapsulation efficiency and a maximum of 20% ferric hemoglobin, yielding 100 µg/mL active hemoglobin in certain sfHBOC formulations. The system did not elicit a strong inflammation response in vitro, demonstrating the potential for this particle system to serve as an injectable HBOC.
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Affiliation(s)
- Marisa O Pacheco
- Department of Chemical Engineering, University of Florida, Gainesville FL
| | - Henry M Lutz
- Department of Chemical Engineering, University of Florida, Gainesville FL
| | - Jostin Armada
- Department of Chemical Engineering, University of Florida, Gainesville FL
| | - Nickolas Davies
- Department of Anesthesiology, College of Medicine, University of Florida, Gainesville FL
| | | | - Alaura S Cakley
- Department of Chemical Engineering, University of Florida, Gainesville FL
| | - Bruce D Spiess
- Department of Anesthesiology, College of Medicine, University of Florida, Gainesville FL
| | - Whitney L Stoppel
- Department of Chemical Engineering, University of Florida, Gainesville FL
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville FL
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6
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Scalable production and complete biophysical characterization of poly(ethylene glycol) surface conjugated liposome encapsulated hemoglobin (PEG-LEH). PLoS One 2022; 17:e0269939. [PMID: 35802716 PMCID: PMC9269976 DOI: 10.1371/journal.pone.0269939] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 05/31/2022] [Indexed: 11/19/2022] Open
Abstract
Particle encapsulated hemoglobin (Hb)-based oxygen (O2) carriers (HBOCs) have clear advantages over their acellular counterparts because of their larger molecular diameter and lack of vasoactivity upon transfusion. Poly(ethylene glycol) surface conjugated liposome encapsulated Hb (PEG-LEH) nanoparticles are considered a promising class of HBOC for use as a red blood cell (RBC) substitute. However, their widespread usage is limited by manufacturing processes which prevent material scale up. In this study, PEG-LEH nanoparticles were produced via a scalable and robust process using a high-pressure cell disruptor, and their biophysical properties were thoroughly characterized. Hb encapsulation, methemoglobin (metHb) level, O2-PEG-LEH equilibria, PEG-LEH gaseous (oxygen, carbon monoxide, nitric oxide) ligand binding/release kinetics, lipocrit, and long-term storage stability allowed us to examine their potential suitability and efficacy as an RBC replacement. Our results demonstrate that PEG-LEH nanoparticle suspensions manufactured via a high-pressure cell disruptor have Hb concentrations comparable to whole blood (~12 g/dL) and possess other desirable characteristics, which may permit their use as potential lifesaving O2 therapeutics.
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7
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Shin J, Cole BD, Shan T, Jang Y. Heterogeneous Synthetic Vesicles toward Artificial Cells: Engineering Structure and Composition of Membranes for Multimodal Functionalities. Biomacromolecules 2022; 23:1505-1518. [PMID: 35266692 DOI: 10.1021/acs.biomac.1c01504] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The desire to develop artificial cells to imitate living cells in synthetic vesicle platforms has continuously increased over the past few decades. In particular, heterogeneous synthetic vesicles made from two or more building blocks have attracted attention for artificial cell applications based on their multifunctional modules with asymmetric structures. In addition to the traditional liposomes or polymersomes, polypeptides and proteins have recently been highlighted as potential building blocks to construct artificial cells owing to their specific biological functionalities. Incorporating one or more functionally folded, globular protein into synthetic vesicles enables more cell-like functions mediated by proteins. This Review highlights the recent research about synthetic vesicles toward artificial cell models, from traditional synthetic vesicles to protein-assembled vesicles with asymmetric structures. We aim to provide fundamental and practical insights into applying knowledge on molecular self-assembly to the bottom-up construction of artificial cell platforms with heterogeneous building blocks.
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Affiliation(s)
- Jooyong Shin
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Blair D Cole
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Ting Shan
- Department of Biomedical Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Yeongseon Jang
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
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8
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9
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Cuddington CT, Wolfe SR, Palmer AF. Biophysical properties of tense quaternary state polymerized human hemoglobins bracketed between 500 kDa and 0.2 μm in size. Biotechnol Prog 2022; 38:e3219. [PMID: 34626100 PMCID: PMC8854340 DOI: 10.1002/btpr.3219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/29/2021] [Accepted: 10/04/2021] [Indexed: 01/03/2023]
Abstract
Polymerized hemoglobin (Hb)-based oxygen carriers (HBOCs) are a scalable and cost-effective red blood cell (RBC) substitute. However, previous generations of commercial polymerized HBOCs elicited oxidative tissue injury in vivo due to the presence of low molecular weight polymeric Hb species (<500 kDa) and cell-free Hb (64 kDa). Polymerized human Hb (PolyhHb) locked in the tense quaternary state (T-state) exhibits great promise to meet clinical needs where past polymerized HBOCs failed. This work shows that separation of T-state PolyhHb via a two-stage tangential flow filtration (TFF) purification train such that the Hb polymers are bracketed between 500 kDa and 0.2 μm creates a uniform polymer size and largely eliminates the Hb species which elicit deleterious side effects in vivo. Biophysical characterization of these materials demonstrates their potential effectiveness as an RBC substitute and verifies the low percentage of low molecular weight Hb polymers and cell-free Hb. Size exclusion chromatography confirms that T-state PolyhHb can be consistently produced in a size range between 500 kDa and 0.2 μm. Furthermore, the average molecular weight of all PolyhHb species produced is one or two orders of magnitude larger than that of the commercial polymerized HBOCs Hemolink and Oxyglobin, respectively. Haptoglobin binding kinetics confirms that two-stage TFF processing of PolyhHb reliably removes cell-free Hb and low molecular weight polymeric Hb species. T-state PolyhHbs demonstrate lower auto-oxidation rates compared to unmodified Hb and prior generations of commercial polymerized HBOCs. These results demonstrate T-state PolyhHb's feasibility as a next-generation polymerized HBOC for potential use in transfusion medicine.
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Affiliation(s)
- Clayton T. Cuddington
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, OH, 43210
| | - Savannah R. Wolfe
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, OH, 43210
| | - Andre F. Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 452 CBEC, 151 West Woodruff Avenue, Columbus, OH, 43210
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10
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Apohemoglobin-haptoglobin complexes attenuate the hypertensive response to low-molecular-weight polymerized hemoglobin. Blood Adv 2021; 4:2739-2750. [PMID: 32559292 DOI: 10.1182/bloodadvances.2020002045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 05/15/2020] [Indexed: 01/21/2023] Open
Abstract
Polymerized hemoglobin (PolyHb) is a promising hemoglobin (Hb)-based oxygen carrier currently undergoing development as a red blood cell substitute. Unfortunately, commercially developed products are composed of low-molecular-weight (LMW) PolyHb molecules, which extravasate, scavenge nitric oxide, and result in vasoconstriction and hypertension. The naturally occurring Hb-scavenging species haptoglobin (Hp), combined with the purified heme-scavenging species apohemoglobin (apoHb), is a potential candidate to alleviate the pressor effect of PolyHb. This study evaluated the protective activity of administering the apoHb-Hp complex to mitigate the vasoactive response induced by the transfusion of LMW PolyHb. Hp binding to PolyHb was characterized in vitro. The effectiveness of apoHb-Hp administration on reducing the vasoconstriction and pressor effects of PolyHb was assessed by measuring systemic and microcirculatory hemodynamics. Transfusion of LMW PolyHb to vehicle control pretreated animals increased mean arterial pressure while decreasing arteriole diameter and functional capillary density. However, transfusion of LMW PolyHb to apoHb-Hp pretreated animals prevented changes in mean arterial pressure, heart rate, arteriole diameter, blood flow, and functional capillary density relative to before transfusion. These results indicate that the increased size of PolyHb after binding to the apoHb-Hp complex may help compartmentalize PolyHb in the vascular space and thus reduce extravasation, nitric oxide scavenging, and toxicity responsible for vasoconstriction and systemic hypertension.
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11
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Hickey R, Palmer AF. Synthesis of Hemoglobin-Based Oxygen Carrier Nanoparticles By Desolvation Precipitation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:14166-14172. [PMID: 33205655 DOI: 10.1021/acs.langmuir.0c01698] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hemoglobin (Hb)-based oxygen carriers (HBOCs) present an alternative to red blood cells (RBCs) when blood is not available. However, the most widely used synthesis techniques have fundamental flaws, which may have contributed toward disappointing clinical application. Polymerized Hb contains a heterogeneous distribution of particle size and shape, while Hb encapsulation inside liposomes results in high lipid burden and low Hb content. Meanwhile, there are a variety of other nanoparticle synthetic techniques which, having found success as drug delivery vehicles, may be well suited to function as an HBOC. We synthesized desolvated Hb nanoparticles (Hb-dNPs) with diameters of approximately 250 nm by the controlled precipitation of Hb with ethanol. Oxidized dextran was found to be an effective surface stabilizing agent that maintained particle integrity. In vitro biophysical characterization showed a high-affinity oxygen delivery profile (P50 = 7.72 mm Hg), suggesting a potential for therapeutic use and opening a new avenue for HBOC research.
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Affiliation(s)
- Richard Hickey
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
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12
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Savla C, Munoz C, Hickey R, Belicak M, Gilbert C, Cabrales P, Palmer AF. Purification of Lumbricus terrestris Mega-Hemoglobin for Diverse Oxygen Therapeutic Applications. ACS Biomater Sci Eng 2020; 6:4957-4968. [PMID: 33313397 DOI: 10.1021/acsbiomaterials.0c01146] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Oxygen therapeutics are being developed for a variety of applications in transfusion medicine. In order to reduce the side-effects (vasoconstriction, systemic hypertension, and oxidative tissue injury) associated with previous generations of oxygen therapeutics, new strategies are focused on increasing the molecular diameter of hemoglobin obtained from mammalian sources via polymerization and encapsulation. Another approach towards oxygen therapeutic design has centered on using naturally occurring large molecular diameter hemoglobins (i.e. erythrocruorins) derived from annelid sources. Therefore, the goal of this study was to purify erythrocruorin from the terrestrial worm Lumbricus terrestris for diverse oxygen therapeutic applications. Tangential flow filtration (TFF) was used as a scalable protein purification platform to obtain a >99% pure LtEc product, which was confirmed by size exclusion high performance liquid chromatography and SDS-PAGE analysis. In vitro characterization concluded that the ultra-pure LtEc product had oxygen equilibrium properties similar to human red blood cells, and a lower rate of auto-oxidation compared to human hemoglobin, both of which should enable efficient oxygen transport under physiological conditions. In vivo evaluation concluded that the ultra-pure product had positive effects on the microcirculation sustaining functional capillary density compared to a less pure product (~86% purity). In summary, we purified an LtEc product with favorable biophysical properties that performed well in an animal model using a reliable and scalable purification platform to eliminate undesirable proteins.
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Affiliation(s)
- Chintan Savla
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Carlos Munoz
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA
| | - Richard Hickey
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Maria Belicak
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Christopher Gilbert
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Pedro Cabrales
- Department of Bioengineering, University of California, San Diego, La Jolla, California, USA
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio, USA
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13
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Polymerized human hemoglobin facilitated modulation of tumor oxygenation is dependent on tumor oxygenation status and oxygen affinity of the hemoglobin-based oxygen carrier. Sci Rep 2020; 10:11372. [PMID: 32647211 PMCID: PMC7347553 DOI: 10.1038/s41598-020-68190-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 06/17/2020] [Indexed: 12/18/2022] Open
Abstract
Administration of hemoglobin-based oxygen carriers (HBOCs) into the systemic circulation is a potential strategy to relieve solid tumor hypoxia in order to increase the effectiveness of chemotherapeutics. Previous computational analysis indicated that the oxygen (O2) status of the tumor and HBOC O2 affinity may play a role in increased O2 delivery to the tumor. However, no study has experimentally investigated how low- and high-affinity HBOCs would perform in normoxic and hypoxic tumors. In this study, we examined how the HBOC, polymerized human hemoglobin (PolyhHb), in the relaxed (R) or tense (T) quaternary state modulates O2 delivery to hypoxic (FME) and normoxic (LOX) human melanoma xenografts in a murine window chamber model. We examined microcirculatory fluid flow via video shearing optical microscopy, and O2 distributions via phosphorescence quenching microscopy. Additionally, we examined how weekly infusion of a 20% top-load dose of PolyhHb influences growth rate, vascularization, and regional blood flow in the FME and LOX tumor xenografts. Infusion of low-affinity T-state PolyhHb led to increased tissue oxygenation, decreased blood flow, decreased tumor growth, and decreased vascularization in hypoxic tumors. However, infusion of both T-state and R-state PolyhHbs led to worse outcomes in normoxic tumors. Of particular concern was the high-affinity R-state PolyhHb, which led to no improvement in hypoxic tumors and significantly worsened outcomes in normoxic tumors. Taken together, the results of this study indicate that the tumor O2 status is a primary determinant of the potency and outcomes of infused PolyhHb.
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Gu X, Bolden-Rush C, Cuddington CT, Belcher DA, Savla C, Pires IS, Palmer AF. Comprehensive characterization of tense and relaxed quaternary state glutaraldehyde polymerized bovine hemoglobin as a function of cross-link density. Biotechnol Bioeng 2020; 117:2362-2376. [PMID: 32472694 DOI: 10.1002/bit.27382] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/07/2020] [Accepted: 05/09/2020] [Indexed: 11/08/2022]
Abstract
Previously, our lab developed high molecular weight (MW) tense (T) quaternary state glutaraldehyde polymerized bovine hemoglobins (PolybHbs) that exhibited reduced vasoactivity in several small animal models. In this study, we prepared PolybHb in the T and relaxed (R) quaternary state with ultrahigh MW (>500 kDa) with varying cross-link densities, and investigated the effect of MW on key biophysical properties (i.e., O2 affinity, cooperativity (Hill) coefficient, hydrodynamic diameter, polydispersity, polymer composition, viscosity, gaseous ligand-binding kinetics, auto-oxidation, and haptoglobin [Hp]-binding kinetics). To further optimize current PolybHb synthesis and purification protocols, we performed a comprehensive meta-data analysis to evaluate correlations between procedural parameters (i.e., cross-linker:bovine hemoglobin (bHb) molar ratio, gas-liquid exchange time, temperature during sodium dithionite addition, and number of diafiltration cycles) and the biophysical properties of both T- and R-state PolybHbs. Our results showed that, the duration of the fast-step auto-oxidation phase of R-state PolybHb increased with decreasing glutaraldehyde:bHb molar ratio. Additionally, T-state PolybHbs exhibited significantly higher bimolecular rate constants for binding to Hp and unimolecular O2 offloading rate constants compared to R-state PolybHbs. The methemoglobin (metHb) level in the final product was insensitive to the molar ratio of glutaraldehyde to bHb for all PolybHbs. During tangential flow filtration processing of the final product, 14 diafiltration cycles was found to yield the lowest metHb level.
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Affiliation(s)
- Xiangming Gu
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio
| | - Crystal Bolden-Rush
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio
| | - Clayton T Cuddington
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio
| | - Donald A Belcher
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio
| | - Chintan Savla
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio
| | - Ivan S Pires
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio
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15
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New Modified Deoxythymine with Dibranched Tetraethylene Glycol Stabilizes G-Quadruplex Structures. Molecules 2020; 25:molecules25030705. [PMID: 32041318 PMCID: PMC7036917 DOI: 10.3390/molecules25030705] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 01/28/2020] [Accepted: 02/02/2020] [Indexed: 11/24/2022] Open
Abstract
Methods for stabilizing G-quadruplex formation is a promising therapeutic approach for cancer treatment and other biomedical applications because stable G-quadruplexes efficiently inhibit biological reactions. Oligo and polyethylene glycols are promising biocompatible compounds, and we have shown that linear oligoethylene glycols can stabilize G-quadruplexes. Here, we developed a new modified deoxythymine with dibranched or tribranched tetraethylene glycol (TEG) and incorporated these TEG-modified deoxythymines into a loop region that forms an antiparallel G-quadruplex. We analyzed the stability of the modified G-quadruplexes, and the results showed that the tribranched TEG destabilized G-quadruplexes through entropic contributions, likely through steric hindrance. Interestingly, the dibranched TEG modification increased G-quadruplex stability relative to the unmodified DNA structures due to favorable enthalpic contributions. Molecular dynamics calculations suggested that dibranched TEG interacts with the G-quadruplex through hydrogen bonding and CH-π interactions. Moreover, these branched TEG-modified deoxythymine protected the DNA oligonucleotides from degradation by various nucleases in human serum. By taking advantage of the unique interactions between DNA and branched TEG, advanced DNA materials can be developed that affect the regulation of DNA structure.
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16
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Belcher DA, Cuddington CT, Martindale EL, Pires IS, Palmer AF. Controlled Polymerization and Ultrafiltration Increase the Consistency of Polymerized Hemoglobin for Use as an Oxygen Carrier. Bioconjug Chem 2020; 31:605-621. [PMID: 31868349 DOI: 10.1021/acs.bioconjchem.9b00766] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Polymerized human hemoglobins (PolyhHbs) are a promising class of red blood cell substitute for use in transfusion medicine. Unfortunately, the application of the commonly used glutaraldehyde cross-linking chemistry to synthesize these materials results in a complex mixture of PolyhHb molecules with highly varied batch-to-batch consistency. We implemented a controlled method of gas exchange and reagent addition that results in a homogeneous PolyhHb product. A fully coupled tangential flow filtration system was used to purify and concentrate the synthesized PolyhHb molecules. This improved method of PolyhHb production could be used to more precisely control the size and reduce the polydispersity of PolyhHb molecules, with minimal effects on the resulting oxygen-carrying capability. In addition to these factors, we assessed how the hemoglobin scavenging protein haptoglobin (Hp) would interact with PolyhHb molecules of varying sizes and quarternary states. Our results indicated that T-state PolyhHbs may be more efficiently detoxified by Hp compared with R-state PolyhHb and unmodified Hb.
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Affiliation(s)
- Donald A Belcher
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Clayton T Cuddington
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Evan L Martindale
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Ivan S Pires
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
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17
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Liu X, Jansman MMT, Thulstrup PW, Mendes AC, Chronakis IS, Hosta‐Rigau L. Low‐Fouling Electrosprayed Hemoglobin Nanoparticles with Antioxidant Protection as Promising Oxygen Carriers. Macromol Biosci 2019; 20:e1900293. [DOI: 10.1002/mabi.201900293] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/31/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Xiaoli Liu
- DTU Health TechCenter for Nanomedicine and TheranosticsTechnical University of DenmarkNils Koppels Allé B423 2800 Kgs Lyngby Denmark
| | - Michelle M. T. Jansman
- DTU Health TechCenter for Nanomedicine and TheranosticsTechnical University of DenmarkNils Koppels Allé B423 2800 Kgs Lyngby Denmark
| | - Peter W. Thulstrup
- Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Denmark
| | - Ana C. Mendes
- DTU FoodTechnical University of Denmark Kemitorvet, B202 2800 Kgs Lyngby Denmark
| | - Ioannis S. Chronakis
- DTU FoodTechnical University of Denmark Kemitorvet, B202 2800 Kgs Lyngby Denmark
| | - Leticia Hosta‐Rigau
- DTU Health TechCenter for Nanomedicine and TheranosticsTechnical University of DenmarkNils Koppels Allé B423 2800 Kgs Lyngby Denmark
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18
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Pires IS, Belcher DA, Hickey R, Miller C, Badu‐Tawiah AK, Baek JH, Buehler PW, Palmer AF. Novel manufacturing method for producing apohemoglobin and its biophysical properties. Biotechnol Bioeng 2019; 117:125-145. [DOI: 10.1002/bit.27193] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 06/08/2019] [Accepted: 10/11/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Ivan S. Pires
- William G. Lowrie Department of Chemical and Biomolecular EngineeringThe Ohio State University Columbus Ohio
| | - Donald A. Belcher
- William G. Lowrie Department of Chemical and Biomolecular EngineeringThe Ohio State University Columbus Ohio
| | - Richard Hickey
- William G. Lowrie Department of Chemical and Biomolecular EngineeringThe Ohio State University Columbus Ohio
| | - Colbert Miller
- Department of Chemistry and BiochemistryThe Ohio State University Columbus Ohio
| | | | - Jin Hyen Baek
- Laboratory of Biochemistry and Vascular Biology, Division of Hematology, Center for Biologics Evaluation and ResearchFood and Drug Administration Silver Spring Maryland
| | - Paul W. Buehler
- Laboratory of Biochemistry and Vascular Biology, Division of Hematology, Center for Biologics Evaluation and ResearchFood and Drug Administration Silver Spring Maryland
| | - Andre F. Palmer
- William G. Lowrie Department of Chemical and Biomolecular EngineeringThe Ohio State University Columbus Ohio
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Lucas-González R, Viuda-Martos M, Pérez-Alvarez JA, Fernández-López J. In vitro digestion models suitable for foods: Opportunities for new fields of application and challenges. Food Res Int 2018; 107:423-436. [PMID: 29580504 DOI: 10.1016/j.foodres.2018.02.055] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 02/19/2018] [Accepted: 02/25/2018] [Indexed: 01/08/2023]
Abstract
In vitro digestion assays simulate the physiological conditions of digestion in vivo and are useful tools for studying and understanding changes, interactions, as well as the bioaccessibility of nutrients, drugs and non-nutritive compounds. The technique is widely used in fields such as nutrition, pharmacology and food chemistry. Over the last 40 years, more than 2500 research articles have been published using in vitro digestion assays (85% of which have been published in the last two decades) to elucidate multiple aspects such as protein digestibility, nutrient interactions or the viability of encapsulated microorganisms. The most recent trend in the use of this technique involves the determination of the antioxidant activity of bioactive compounds after digestion. However, the inability to reproduce certain in vivo digestion events, as well as the multiple models of in vitro digestion, point to a need to optimize and validate the method with in vivo assays to determine its limitations and uses. The purpose of this paper is to provide an overview of the current state of the art of in vitro digestion models through an analysis of how they have evolved in terms of the development of digestion models (parameters, protocols, guidance) and taking into consideration the boom in new fields of application.
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Affiliation(s)
- Raquel Lucas-González
- IPOA Research Group, Agro-Food Technology Department, Escuela Politécnica Superior de Orihuela, Universidad Miguel Hernández, Orihuela, Alicante, Spain
| | - Manuel Viuda-Martos
- IPOA Research Group, Agro-Food Technology Department, Escuela Politécnica Superior de Orihuela, Universidad Miguel Hernández, Orihuela, Alicante, Spain
| | - José Angel Pérez-Alvarez
- IPOA Research Group, Agro-Food Technology Department, Escuela Politécnica Superior de Orihuela, Universidad Miguel Hernández, Orihuela, Alicante, Spain
| | - Juana Fernández-López
- IPOA Research Group, Agro-Food Technology Department, Escuela Politécnica Superior de Orihuela, Universidad Miguel Hernández, Orihuela, Alicante, Spain.
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20
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Kanwa N, De SK, Adhikari C, Chakraborty A. Spectroscopic Study of the Interaction of Carboxyl-Modified Gold Nanoparticles with Liposomes of Different Chain Lengths and Controlled Drug Release by Layer-by-Layer Technology. J Phys Chem B 2017; 121:11333-11343. [DOI: 10.1021/acs.jpcb.7b08455] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Nishu Kanwa
- Discipline of Chemistry, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India 453552
| | - Soumya Kanti De
- Discipline of Chemistry, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India 453552
| | - Chandan Adhikari
- Discipline of Chemistry, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India 453552
| | - Anjan Chakraborty
- Discipline of Chemistry, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India 453552
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21
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Tateishi-Karimata H, Ohyama T, Muraoka T, Podbevsek P, Wawro AM, Tanaka S, Nakano SI, Kinbara K, Plavec J, Sugimoto N. Newly characterized interaction stabilizes DNA structure: oligoethylene glycols stabilize G-quadruplexes CH-π interactions. Nucleic Acids Res 2017; 45:7021-7030. [PMID: 28453855 PMCID: PMC5499538 DOI: 10.1093/nar/gkx299] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 04/25/2017] [Indexed: 12/30/2022] Open
Abstract
Oligoethylene glycols are used as crowding agents in experiments that aim to understand the effects of intracellular environments on DNAs. Moreover, DNAs with covalently attached oligoethylene glycols are used as cargo carriers for drug delivery systems. To investigate how oligoethylene glycols interact with DNAs, we incorporated deoxythymidine modified with oligoethylene glycols of different lengths, such as tetraethylene glycol (TEG), into DNAs that form antiparallel G-quadruplex or hairpin structures such that the modified residues were incorporated into loop regions. Thermodynamic analysis showed that because of enthalpic differences, the modified G-quadruplexes were stable and the hairpin structures were slightly unstable relative to unmodified DNA. The stability of G-quadruplexes increased with increasing length of the ethylene oxides and the number of deoxythymidines modified with ethylene glycols in the G-quadruplex. Nuclear magnetic resonance analyses and molecular dynamics calculations suggest that TEG interacts with bases in the G-quartet and loop via CH–π and lone pair–π interactions, although it was previously assumed that oligoethylene glycols do not directly interact with DNAs. The results suggest that numerous cellular co-solutes likely affect DNA function through these CH–π and lone pair–π interactions.
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Affiliation(s)
- Hisae Tateishi-Karimata
- Frontier Institute for Biomolecular Engineering Research (FIBER), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Tatsuya Ohyama
- Frontier Institute for Biomolecular Engineering Research (FIBER), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Takahiro Muraoka
- Tokyo Institute of Technology, School of Life Science and Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Peter Podbevsek
- Slovenian NMR Center, National Institute of Chemistry, Slovenia
| | - Adam M Wawro
- Tokyo Institute of Technology, School of Life Science and Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Shigenori Tanaka
- Department of Computational Science, Graduate School of System Informatics, Kobe University, 1-1, Rokkodai, Nada-ku, Kobe 657-8501, Japan
| | - Shu-Ichi Nakano
- Graduate School of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Kazushi Kinbara
- Tokyo Institute of Technology, School of Life Science and Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Janez Plavec
- Slovenian NMR Center, National Institute of Chemistry, Slovenia
| | - Naoki Sugimoto
- Frontier Institute for Biomolecular Engineering Research (FIBER), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan.,Graduate School of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
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22
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Belcher DA, Banerjee U, Baehr CM, Richardson KE, Cabrales P, Berthiaume F, Palmer AF. Mixtures of tense and relaxed state polymerized human hemoglobin regulate oxygen affinity and tissue construct oxygenation. PLoS One 2017; 12:e0185988. [PMID: 29020036 PMCID: PMC5636107 DOI: 10.1371/journal.pone.0185988] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 09/23/2017] [Indexed: 01/20/2023] Open
Abstract
Pure tense (T) and relaxed (R) quaternary state polymerized human hemoglobins (PolyhHbs) were synthesized and their biophysical properties characterized, along with mixtures of T- and R-state PolyhHbs. It was observed that the oxygen affinity of PolyhHb mixtures varied linearly with T-state mole fraction. Computational analysis of PolyhHb facilitated oxygenation of a single fiber in a hepatic hollow fiber (HF) bioreactor was performed to evaluate the oxygenation potential of T- and R-state PolyhHb mixtures. PolyhHb mixtures with T-state mole fractions greater than 50% resulted in hypoxic and hyperoxic zones occupying less than 5% of the total extra capillary space (ECS). Under these conditions, the ratio of the pericentral volume to the perivenous volume in the ECS doubled as the T-state mole fraction increased from 50 to 100%. These results show the effect of varying the T/R-state PolyhHb mole fraction on oxygenation of tissue-engineered constructs and their potential to oxygenate tissues.
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Affiliation(s)
- Donald Andrew Belcher
- William G. Lowrie Department of Chemical and Biomolecular Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, United States of America
| | - Uddyalok Banerjee
- William G. Lowrie Department of Chemical and Biomolecular Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, United States of America
| | - Christopher Michael Baehr
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, United States of America
| | - Kristopher Emil Richardson
- William G. Lowrie Department of Chemical and Biomolecular Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, United States of America
| | - Pedro Cabrales
- Department of Bioengineering, University of California, San Diego, La Jolla, California, United States of America
| | - François Berthiaume
- Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey, United States of America
| | - Andre Francis Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, United States of America
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Ivashkov OV, Sybachin AV, Efimova AA, Orlov VN, Pergushov DV, Schmalz H, Yaroslavov AA. Composition and properties of complexes between anionic liposomes and diblock copolymers with cationic and poly(ethylene oxide) blocks. POLYM INT 2017. [DOI: 10.1002/pi.5431] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Oleg V Ivashkov
- Department of Chemistry; MV Lomonosov Moscow State University; Moscow Russia
| | - Andrey V Sybachin
- Department of Chemistry; MV Lomonosov Moscow State University; Moscow Russia
| | - Anna A Efimova
- Department of Chemistry; MV Lomonosov Moscow State University; Moscow Russia
| | - Viktor N Orlov
- Research Institute of Physico-Chemical Biology; MV Lomonosov Moscow State University; Moscow Russia
| | - Dmitry V Pergushov
- Department of Chemistry; MV Lomonosov Moscow State University; Moscow Russia
| | - Holger Schmalz
- Makromolekulare Chemie II; Universität Bayreuth; Bayreuth Germany
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Tateishi-Karimata H, Muraoka T, Kinbara K, Sugimoto N. G-Quadruplexes with Tetra(ethylene glycol)-Modified Deoxythymidines are Resistant to Nucleases and Inhibit HIV-1 Reverse Transcriptase. Chembiochem 2016; 17:1399-402. [PMID: 27251574 DOI: 10.1002/cbic.201600162] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Indexed: 12/21/2022]
Abstract
G-quadruplex formation in virally encoded templates arrests reverse transcription. Methods to stabilize this structure are promising for antiviral approaches. To stabilize G-quadruplex formation, deoxythymidines were modified with tetra(ethylene glycol) (TEG). The TEG-modified G-quadruplexes were stabilized significantly relative to unmodified DNA. In the presence of a TEG-modified oligonucleotide that is capable of forming an intermolecular G-quadruplex with a template containing a hu- man immunodeficiency virus-1 sequence, reverse transcription was inhibited by more than 70 % relative to the reaction in the absence of the TEG-modified oligonucleotide. Moreover, the TEG-modified deoxythymidines protected the DNA oligonucleotide from degradation by various nucleases in human serum. Thus, DNA oligonucleotides modified with TEG have potential in therapeutic applications.
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Affiliation(s)
- Hisae Tateishi-Karimata
- Frontier Institute for Biomolecular Engineering Research (FIBER), Konan University, 7-1-20, Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan
| | - Takahiro Muraoka
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Kazushi Kinbara
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Naoki Sugimoto
- Frontier Institute for Biomolecular Engineering Research (FIBER), Konan University, 7-1-20, Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan. .,Graduate School of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20, Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan.
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25
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Sandoval C, Ortega A, Sanchez SA, Morales J, Gunther G. Structuration in the interface of direct and reversed micelles of sucrose esters, studied by fluorescent techniques. PLoS One 2015; 10:e0123669. [PMID: 25905632 PMCID: PMC4408079 DOI: 10.1371/journal.pone.0123669] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 03/06/2015] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Reactors found in nature can be described as micro-heterogeneous systems, where media involved in each micro-environment can behave in a markedly different way compared with the properties of the bulk solution. The presence of water molecules in micro-organized assemblies is of paramount importance for many chemical processes, ranging from biology to environmental science. Self-organized molecular assembled systems are frequently used to study dynamics of water molecules because are the simplest models mimicking biological membranes. The hydrogen bonds between sucrose and water molecules are described to be stronger (or more extensive) than the ones between water molecules themselves. In this work, we studied the capability of sucrose moiety, attached to alkyl chains of different length, as a surface blocking agent at the water-interface and we compared its properties with those of polyethylenglycol, a well-known agent used for this purposes. Published studies in this topic mainly refer to the micellization process and the stability of mixed surfactant systems using glycosides. We are interested in the effect induced by the presence of sucrose monoesters at the interface (direct and reverse micelles) and at the palisade (mixtures with Triton X-100). We believe that the different functional group (ester), the position of alkyl chain (6-O) and the huge capability of sucrose to interact with water will dramatically change the water structuration at the interface and at the palisade, generating new possibilities for technological applications of these systems. RESULTS Our time resolved and steady state fluorescence experiments in pure SEs micelles show that sucrose moieties are able to interact with a high number of water molecules promoting water structuration and increased viscosity. These results also indicate that the barrier formed by sucrose moieties on the surface of pure micelles is more effective than the polyoxyethylene palisade of Triton X-100. The fluorescence quenching experiments of SEs at the palisade of Triton X-100 micelles indicate a blocking effect dependent on the number of methylene units present in the hydrophobic tail of the surfactant. A remarkable blocking effect is observed when there is a match in size between the hydrophobic regions forming the apolar core (lauryl SE/ Triton X-100). This blocking effect disappears when a mismatch in size between hydrophobic tails, exists due to the disturbing effect on the micelle core.
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Affiliation(s)
- Catalina Sandoval
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - Anakenna Ortega
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - Susana A. Sanchez
- Departamento de Polímeros, Facultad de Química, Universidad de Concepción, Concepción, Chile
| | - Javier Morales
- Departamento de Ciencias y Tecnología Farmacéuticas, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - German Gunther
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
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Jeon S, Yoo CY, Park SN. Improved stability and skin permeability of sodium hyaluronate-chitosan multilayered liposomes by Layer-by-Layer electrostatic deposition for quercetin delivery. Colloids Surf B Biointerfaces 2015; 129:7-14. [PMID: 25819360 DOI: 10.1016/j.colsurfb.2015.03.018] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 02/23/2015] [Accepted: 03/03/2015] [Indexed: 02/05/2023]
Abstract
Layer-by-Layer (LbL) technology, based on the electrostatic interaction of polyelectrolytes, is used to improve the stability of drug delivery systems. In the present study, we developed multilayered liposomes with up to 10 alternating layers based on LbL deposition of hyaluronate-chitosan for transdermal delivery. Dihexadecyl phosphate was used to provide liposomes with a negative charge; the liposomes were subsequently coated with cationic chitosan (CH) followed by anionic sodium hyaluronate (HA). The resulting particles had a cumulative size of 528.28±29.22nm and an alternative change in zeta potential. Differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) revealed that the multilayered liposomes formed a spherical polyelectrolyte complex (PEC) after deposition. Observations in size distribution after 1 week found that the particles coated with even layers of polyelectrolytes, hyaluronate and chitosan (HA-CH), were more stable than the odd layers. Membrane stability in the presence of the surfactant Triton X-100 increased with an increase in bilayers as compared to uncoated liposomes. An increase in the number of bilayers deposited on the liposomal surface resulted in a sustained release of quercetin, with release kinetics that fit the Korsmeyer-Peppas model. In an in vitro skin permeation study, negatively charged (HA-CH)-L and positively charged CH-L were observed to have similar skin permeability, which were superior to uncoated liposomes. These results indicate that multilayered liposomes properly coated with polyelectrolytes of HA and CH by electrostatic interaction improve stability and can also function as potential drug delivery system for the transdermal delivery of the hydrophobic antioxidant quercetin.
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Affiliation(s)
- Soha Jeon
- Department of Fine Chemistry, College of Energy and Biotechnology, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul 137-743, South Korea
| | - Cha Young Yoo
- Department of Fine Chemistry, College of Energy and Biotechnology, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul 137-743, South Korea
| | - Soo Nam Park
- Department of Fine Chemistry, College of Energy and Biotechnology, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul 137-743, South Korea.
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27
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Colapicchioni V, Palchetti S, Pozzi D, Marini ES, Riccioli A, Ziparo E, Papi M, Amenitsch H, Caracciolo G. Killing cancer cells using nanotechnology: novel poly(I:C) loaded liposome–silica hybrid nanoparticles. J Mater Chem B 2015; 3:7408-7416. [DOI: 10.1039/c5tb01383f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Synthesized core–shell liposome–silica hybrid nanoparticles (LSH NPs), when loaded with the anti-cancer polyinosinic–polycytidylic acid (poly(I:C)), exhibit high anti-tumoral activity in prostate and breast cancer cells.
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Affiliation(s)
| | - Sara Palchetti
- Department of Molecular Medicine
- ‘Sapienza’ University of Rome
- 00161 Rome
- Italy
| | - Daniela Pozzi
- Department of Molecular Medicine
- ‘Sapienza’ University of Rome
- 00161 Rome
- Italy
| | - Elettra Sara Marini
- Istituto Pasteur-Fondazione Cenci Bolognetti
- Department of Anatomy
- Histology
- Forensic Medicine and Orthopaedics
- Section of Histology and Medical Embryology
| | - Anna Riccioli
- Istituto Pasteur-Fondazione Cenci Bolognetti
- Department of Anatomy
- Histology
- Forensic Medicine and Orthopaedics
- Section of Histology and Medical Embryology
| | - Elio Ziparo
- Istituto Pasteur-Fondazione Cenci Bolognetti
- Department of Anatomy
- Histology
- Forensic Medicine and Orthopaedics
- Section of Histology and Medical Embryology
| | - Massimiliano Papi
- Istituto di Fisica
- Università Cattolica del Sacro Cuore
- 00168 Rome
- Italy
| | - Heinz Amenitsch
- Institute of Inorganic Chemistry
- Graz University of Technology
- 8010 Graz
- Austria
| | - Giulio Caracciolo
- Department of Molecular Medicine
- ‘Sapienza’ University of Rome
- 00161 Rome
- Italy
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28
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Celia C, Ferrati S, Bansal S, van de Ven AL, Ruozi B, Zabre E, Hosali S, Paolino D, Sarpietro MG, Fine D, Fresta M, Ferrari M, Grattoni A. Sustained zero-order release of intact ultra-stable drug-loaded liposomes from an implantable nanochannel delivery system. Adv Healthc Mater 2014; 3:230-8. [PMID: 23881575 PMCID: PMC3970317 DOI: 10.1002/adhm.201300188] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Indexed: 11/10/2022]
Abstract
Metronomic chemotherapy supports the idea that long-term, sustained, constant administration of chemotherapeutics, currently not achievable, could be effective against numerous cancers. Particularly appealing are liposomal formulations, used to solubilize hydrophobic therapeutics and minimize side effects, while extending drug circulation time and enabling passive targeting. As liposome alone cannot survive in circulation beyond 48 h, sustaining their constant plasma level for many days is a challenge. To address this, we develop, as a proof of concept, an implantable nanochannel delivery system and ultra-stable PEGylated lapatinib-loaded liposomes, and we demonstrate the release of intact vesicles for over 18 d. Further, we investigate intravasation kinetics of subcutaneously delivered liposomes and verify their biological activity post nanochannel release on BT474 breast cancer cells. The key innovation of this work is the combination of two nanotechnologies to exploit the synergistic effect of liposomes, demonstrated as passive-targeting vectors and nanofluidics to maintain therapeutic constant plasma levels. In principle, this approach could maximize efficacy of metronomic treatments.
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Affiliation(s)
- Christian Celia
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Silvia Ferrati
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Shyam Bansal
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Anne L. van de Ven
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Barbara Ruozi
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 183, Modena, 41100 (Italy)
| | - Erika Zabre
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Sharath Hosali
- NanoMedical Systems, Inc., 2706 Montopolis Drive Austin, TX 78741, (USA)
| | - Donatella Paolino
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, V.le “S. Venuta” Germaneto – Catanzaro, 88100 (Italy)
| | - Maria Grazia Sarpietro
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, Catania, 95125 (Italy)
| | - Daniel Fine
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA)
| | - Massimo Fresta
- Department of Health Sciences, University “Magna Graecia” of Catanzaro, V.le “S. Venuta” Germaneto – Catanzaro, 88100 (Italy)
| | - Mauro Ferrari
- Department of Nanomedicine, The Methodist Hospital Research Institute, 6670 Bertner Ave. Houston, TX 77030 (USA); Department of Medicine, Weill Cornell Medical College, 1300 York Avenue, New York, NY 1006, (USA), Department of Bioengineering, Rice University, 6100 Main Street Houston, TX 77251, (USA), Alliance for NanoHealth, 6670 Bertner Ave., Houston, TX 77030, (USA)
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29
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Li W, Zhang W, Yang X, Xie Z, Jing X. Biodegradable polymersomes from four-arm PEG-b-PDLLA for encapsulating hemoglobin. J Appl Polym Sci 2014. [DOI: 10.1002/app.40433] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Wenliang Li
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun People's Republic of China
- Jilin Medical College; Jilin People's Republic of China
| | - Wenjing Zhang
- School of Chemistry and Environmental Engineering; Changchun University of Science and Technology; Changchun People's Republic of China
| | - Xiuyun Yang
- School of Chemistry and Environmental Engineering; Changchun University of Science and Technology; Changchun People's Republic of China
| | - Zhigang Xie
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun People's Republic of China
| | - Xiabin Jing
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun People's Republic of China
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30
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Liu W, Liu J, Liu W, Li T, Liu C. Improved physical and in vitro digestion stability of a polyelectrolyte delivery system based on layer-by-layer self-assembly alginate-chitosan-coated nanoliposomes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4133-4144. [PMID: 23566223 DOI: 10.1021/jf305329n] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
To improve lipid membrane stability and prevent leakage of encapsulated food ingredients, a polyelectrolyte delivery system (PDS) based on sodium alginate (AL) and chitosan (CH) coated on the surface of nanoliposomes (NLs) has been prepared and optimized using a layer-by-layer self-assembly deposition technique. Morphology and FTIR observation confirmed PDS has been successfully coated by polymers. Physical stability studies (pH and heat treatment) indicated that the outer-layer polymers could protect the core (NLs) from damage, and PDS showed more intact structure than NLs. Further enzymic digestion stability studies (particle size, surface charge, free fatty acid, and model functional component release) demonstrated that PDS could better resist lipolytic degradation and facilitate a lower level of encapsulated component release in simulated gastrointestinal conditions. This work suggested that deposition of polyelectrolyte on the surface of NLs can stabilize liposomal structure, and PDS could be developed as a formulation for delivering functional food ingredients in the gastrointestinal tract.
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Affiliation(s)
- Weilin Liu
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, Jiangxi, People's Republic of China
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31
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Cabrales P, Rameez S, Palmer AF. Hemoglobin encapsulated poly(ethylene glycol) surface conjugated vesicles attenuate vasoactivity of cell-free hemoglobin. Curr Drug Discov Technol 2012; 9:224-34. [PMID: 22564169 DOI: 10.2174/157016312802650760] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 04/11/2012] [Accepted: 05/01/2012] [Indexed: 12/14/2022]
Abstract
UNLABELLED Widespread clinical use of acellular hemoglobin (Hb)-based O2 carriers (HBOCs) has been hampered by their ability to elicit both vasoconstriction and systemic hypertension. This is primarily due to the ability of acellular Hb to extravasate through the blood vessel wall and scavenge endothelial-derived nitric oxide (NO). Encapsulation of Hb inside the aqueous core of liposomes retards the rates of NO dioxygenation and O2 release, which should reduce or eliminate the vasoactivity of Hb. Our aim is to determine the extent of systemic and microvascular vasoactive responses (hypertension, vasoconstriction and hypoperfusion) after infusion of vesicle encapsulated Hbs, in which the encapsulated Hb is in either the deoxygenated or carbon monoxide (CO) state (HbV and COHbV, respectively). To investigate this hypothesis, we used the hamster window chamber model subjected to two successive hypervolemic infusions of HbV and COHbV solutions (each infusion represents 10% of the animal's calculated blood volume) at Hb concentrations of either 7 or 10 g/dL. The hypervolemic infusion model used in this study has all the regulatory mechanisms responsible for predicting the vasoconstrictive responses of HBOCs. The results of this study demonstrate the absence of vasoconstrictive and hypertensive responses upon single and multiple infusions of HbV and COHbV solutions. The HbV and COHbV solutions increased the plasma O2 carrying capacity. However, COHbV delivered low therapeutic levels of CO without inducing any microcirculatory disturbances. SIGNIFICANCE Vesicles containing Hb can be used as a new therapeutic agent in transfusion medicine to treat anemia and revert hypoperfusion.
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Affiliation(s)
- Pedro Cabrales
- Department of Bioengineering, University of California-San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0412, USA.
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32
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Deonikar P, Kavdia M. Contribution of membrane permeability and unstirred layer diffusion to nitric oxide-red blood cell interaction. J Theor Biol 2012; 317:321-30. [PMID: 23116664 DOI: 10.1016/j.jtbi.2012.10.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Revised: 10/11/2012] [Accepted: 10/18/2012] [Indexed: 11/24/2022]
Abstract
Nitric oxide (NO) consumption by red blood cell (RBC) hemoglobin (Hb) in vasculature is critical in regulating the vascular tone. The paradox of NO production at endothelium in close proximity of an effective NO scavenger Hb in RBCs is mitigated by lower NO consumption by RBCs compared to that of free Hb due to transport resistances including membrane resistance, extra- and intra-cellular resistances for NO biotransport to the RBC. Relative contribution of each transport resistance on NO-RBC interactions is still not clear. We developed a mathematical model of NO transport to a single RBC to quantify the contributions from individual transport barriers by analyzing the effect of RBC membrane permeability (P(m)), hematocrit (Hct) and NO-Hb reaction rate constants on NO-RBC interactions. Our results indicated that intracellular diffusion of NO was not a rate limiting step for NO-RBC interactions. The extracellular diffusion contributed 70-90% of total transport resistance for P(m)>1 cm s(-1) whereas membrane resistance accounts for 50-75% of total transport resistance for P(m)<0.1 cm s(-1). We propose a narrow P(m) range of 0.21-0.44 cm s(-1) for 10-45% Hct, respectively, below which membrane resistance is more significant and above which extracellular diffusion is a dominating transport resistance for NO-RBC interactions.
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Affiliation(s)
- Prabhakar Deonikar
- Department of Biomedical Engineering, Wayne State University, Detroit, 5050 Anthony Wayne Dr., #2152 Engineering, MI 48202, USA.
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33
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Chen K, Merkel TJ, Pandya A, Napier ME, Luft JC, Daniel W, Sheiko S, DeSimone JM. Low modulus biomimetic microgel particles with high loading of hemoglobin. Biomacromolecules 2012; 13:2748-59. [PMID: 22852860 DOI: 10.1021/bm3007242] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We synthesized extremely deformable red blood cell-like microgel particles and loaded them with bovine hemoglobin (Hb) to potentiate oxygen transport. With similar shape and size as red blood cells (RBCs), the particles were fabricated using the PRINT (particle replication in nonwetting templates) technique. Low cross-linking of the hydrogel resulted in very low mesh density for these particles, allowing passive diffusion of hemoglobin throughout the particles. Hb was secured in the particles through covalent conjugation of the lysine groups of Hb to carboxyl groups in the particles via EDC/NHS coupling. Confocal microscopy of particles bound to fluorescent dye-labeled Hb confirmed the uniform distribution of Hb throughout the particle interior, as opposed to the surface conjugation only. High loading ratios, up to 5 times the amount of Hb to polymer by weight, were obtained without a significant effect on particle stability and shape, though particle diameter decreased slightly with Hb conjugation. Analysis of the protein by circular dichroism (CD) spectroscopy showed that the secondary structure of Hb was unperturbed by conjugation to the particles. Methemoglobin in the particles could be maintained at a low level and the loaded Hb could still bind oxygen, as studied by UV-vis spectroscopy. Hb-loaded particles with moderate loading ratios demonstrated excellent deformability in microfluidic devices, easily deforming to pass through restricted pores half as wide as the diameter of the particles. The suspension of concentrated particles with a Hb concentration of 5.2 g/dL showed comparable viscosity to that of mouse blood, and the particles remained intact even after being sheared at a constant high rate (1000 1/s) for 10 min. Armed with the ability to control size, shape, deformability, and loading of Hb into RBC mimics, we will discuss the implications for artificial blood.
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Affiliation(s)
- Kai Chen
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, USA
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34
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Liu M, Gan L, Chen L, Xu Z, Zhu D, Hao Z, Chen L. Supramolecular core-shell nanosilica@liposome nanocapsules for drug delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10725-10732. [PMID: 22746205 DOI: 10.1021/la3021645] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The fabrication of core-shell structural nanosilica@liposome nanocapsules as a drug delivery vehicle is reported. SiO(2) nanoparticles are encapsulated within liposomes by a W/O/W emulsion approach to form supramolecular assemblies with a core of colloidal particles enveloped by a lipid bilayer shell. A nanosilica core provides charge compensation and architectural support for the lipid bilayer, which significantly improves their physical stability. A preliminary application of these core-shell nanocapsules for hemoglobin (Hb) delivery is described. Through the H-bonding interaction between the hydroxyl groups on nanosilicas and the amino nitrogens of Hb, Hb-SiO(2) nanocomplexes in which the saturated adsorption amount of Hb on SiO(2) is 0.47 g g(-1) are coated with lipids to generate core-shell Hb-SiO(2)@liposome nanocapsules with mean diameters of 60-500 nm and Hb encapsulation efficiency of 48.4-87.9%. Hb-SiO(2)@liposome supramolecular nanovehicles create a mode of delivery that stabilizes the encapsulated Hb and achieves long-lasting release, thereby improving the efficacy of the drug. Compared with liposome-encapsulated Hb and Hb-loaded SiO(2) particles, such core-shell nanovehicles show substantially enhanced release performance of Hb in vitro. This finding opens up a new window of liposome-based formulations as drug delivery nanovehicles for widespread pharmaceutical applications.
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Affiliation(s)
- Mingxian Liu
- Department of Chemistry, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
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35
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Rameez S, Guzman N, Banerjee U, Fontes J, Paulaitis ME, Palmer AF, Patel RP, Honavar J. Encapsulation of hemoglobin inside liposomes surface conjugated with poly(ethylene glycol) attenuates their reactions with gaseous ligands and regulates nitric oxide dependent vasodilation. Biotechnol Prog 2012; 28:636-45. [DOI: 10.1002/btpr.1532] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 02/06/2012] [Indexed: 01/03/2023]
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36
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Rameez S, Banerjee U, Fontes J, Roth A, Palmer AF. The Reactivity of Polymersome Encapsulated Hemoglobin with Physiologically Important Gaseous Ligands: Oxygen, Carbon Monoxide and Nitric Oxide. Macromolecules 2012; 45:2385-2389. [PMID: 22865934 DOI: 10.1021/ma202739f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Two distinct preparations of amphiphilic diblock copolymer vesicles (i.e. polymersomes), composed of (poly(ethylene oxide)-poly(butadiene)) (PEO-PBD), with molecular weights of 1.8 kDa and 10.4 kDa, offering different hydrophobic membrane thicknesses, were used to encapsulate the oxygen (O(2)) storage and transport protein hemoglobin (Hb) for possible application as a red blood cell (RBC) substitute. Key biophysical properties as well as the kinetics of polymersome encapsulated Hb (PEH) interaction with physiologically important gaseous ligands (O(2), carbon monoxide and nitric oxide) were measured as a function of the hydrophobic membrane thickness of the PEH particle. Taken together, the results of this work show that PEHs exhibit biophysical properties and retarded ligand binding/release kinetics (compared to cell-free Hb), which are similar to the behavior of RBCs. Therefore, PEHs have the potential to serve as safe and efficacious RBC substitutes for use in transfusion medicine.
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Affiliation(s)
- Shahid Rameez
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 425 Koffolt Laboratories, 140 West 19 Avenue, Columbus, OH 43210
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