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Joma N, Bielawski PB, Saini A, Kakkar A, Maysinger D. Nanocarriers for natural polyphenol senotherapeutics. Aging Cell 2024:e14178. [PMID: 38685568 DOI: 10.1111/acel.14178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 05/02/2024] Open
Abstract
Senescence is a heterogenous and dynamic process in which various cell types undergo cell-cycle arrest due to cellular stressors. While senescence has been implicated in aging and many human pathologies, therapeutic interventions remain inadequate due to the absence of a comprehensive set of biomarkers in a context-dependent manner. Polyphenols have been investigated as senotherapeutics in both preclinical and clinical settings. However, their use is hindered by limited stability, toxicity, modest bioavailability, and often inadequate concentration at target sites. To address these limitations, nanocarriers such as polymer nanoparticles and lipid vesicles can be utilized to enhance the efficacy of senolytic polyphenols. Focusing on widely studied senolytic agents-specifically fisetin, quercetin, and resveratrol-we provide concise summaries of their physical and chemical properties, along with an overview of preclinical and clinical findings. We also highlight common signaling pathways and potential toxicities associated with these agents. Addressing challenges linked to nanocarriers, we present examples of senotherapeutic delivery to various cell types, both with and without nanocarriers. Finally, continued research and development of senolytic agents and nanocarriers are encouraged to reduce the undesirable effects of senescence on different cell types and organs. This review underscores the need for establishing reliable sets of senescence biomarkers that could assist in evaluating the effectiveness of current and future senotherapeutic candidates and nanocarriers.
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Affiliation(s)
- Natali Joma
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
| | | | - Anjali Saini
- Department of Chemistry, McGill University, Montreal, Quebec, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, Montreal, Quebec, Canada
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
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2
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Koshani R, Nia MH, Ataie Z, Wang Y, Kakkar A, van de Ven TGM. Multifunctional self-healing hydrogels via nanoengineering of colloidal and polymeric cellulose. Int J Biol Macromol 2024; 259:129181. [PMID: 38184036 DOI: 10.1016/j.ijbiomac.2023.129181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/13/2023] [Accepted: 12/30/2023] [Indexed: 01/08/2024]
Abstract
The unique features of self-healing hydrogels hold great potential for biomedical applications including injectable hydrogels for cancer treatment, procedures for tumor removal or resection. However, the fabrication of durable and multifunctional self-healing hydrogels composed of biocompatible, green building blocks via versatile synthetic methodology continues to pose a significant challenge. Here, we engineered dialdehyde cellulose (DAC, as a macromolecular bio-crosslinker), and electrosterically stabilized nanocrystalline cellulose (ENCC, as a ligand-targeted drug carrier) to facilitate a strategy for the construction of self-healing hydrogels. Benefiting from its high carboxyl group density, ENCC was functionalized with folic acid (FA) using a non-toxic DMTMM coupling agent and loaded with doxorubicin (DOX, a model drug) through electrostatic interactions. A natural self-healing hydrogel was prepared from carboxymethyl chitosan (CCTS) and DAC mixed with DOX-loaded FA-ENCC using dynamic Schiff-base and hydrogen linkages. A combination of active supramolecular and vital covalent junctions led to a soft (storage modulus ∼500 Pa) and durable material, with rapid (< 5 min) reconstruction of molecular structure from fractured and injected to intact forms. The DAC-CCTS hydrogel showed an appreciable loading capacity of ∼5 mg g-1. Biocompatibility of the hydrogels was evaluated using cell viability and metabolic activity assays, showing lower metabolic activity due to sustained release of its cargo. These materials offer a versatile, sustainable, and green platform for the efficient construction of hydrogels, based on macro- and nano-engineered cellulose, the most abundant and easily accessible biopolymer.
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Affiliation(s)
- Roya Koshani
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada; Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA; Department of Food Science and Agricultural Chemistry, McGill University, Ste Anne de Bellevue, QC H9X 3V9, Canada; Pulp and Paper Research Centre, McGill University, 3420 University Street, Montreal, QC H3A 2A7, Canada; Quebec Centre for Advanced Materials (QCAM), 3420 University Street, Montreal, QC H3A 2A7, Canada; Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
| | - Marzieh Heidari Nia
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada; Pulp and Paper Research Centre, McGill University, 3420 University Street, Montreal, QC H3A 2A7, Canada; Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
| | - Zaman Ataie
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Yixiang Wang
- Department of Food Science and Agricultural Chemistry, McGill University, Ste Anne de Bellevue, QC H9X 3V9, Canada; Quebec Centre for Advanced Materials (QCAM), 3420 University Street, Montreal, QC H3A 2A7, Canada.
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada; Quebec Centre for Advanced Materials (QCAM), 3420 University Street, Montreal, QC H3A 2A7, Canada.
| | - Theo G M van de Ven
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada; Pulp and Paper Research Centre, McGill University, 3420 University Street, Montreal, QC H3A 2A7, Canada; Quebec Centre for Advanced Materials (QCAM), 3420 University Street, Montreal, QC H3A 2A7, Canada.
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Yousefi Adlsadabad S, Hanrahan JW, Kakkar A. mRNA Delivery: Challenges and Advances through Polymeric Soft Nanoparticles. Int J Mol Sci 2024; 25:1739. [PMID: 38339015 PMCID: PMC10855060 DOI: 10.3390/ijms25031739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/16/2024] [Accepted: 01/26/2024] [Indexed: 02/12/2024] Open
Abstract
Single-stranded messenger ribonucleic acid (mRNA) plays a pivotal role in transferring genetic information, and tremendous effort has been devoted over the years to utilize its transcription efficacy in therapeutic interventions for a variety of diseases with high morbidity and mortality. Lipid nanocarriers have been extensively investigated for mRNA delivery and enabled the rapid and successful development of mRNA vaccines against SARS-CoV-2. Some constraints of lipid nanocarriers have encouraged the development of alternative delivery systems, such as polymer-based soft nanoparticles, which offer a modular gene delivery platform. Such macromolecule-based nanocarriers can be synthetically articulated for tailored parameters including mRNA protection, loading efficacy, and targeted release. In this review, we highlight recent advances in the development of polymeric architectures for mRNA delivery, their limitations, and the challenges that still exist, with the aim of expediting further research and the clinical translation of such formulations.
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Affiliation(s)
| | - John W. Hanrahan
- Department of Physiology, McGill University, 3655 Promenade Sir-William-Osler, Montreal, QC H3G 1Y6, Canada;
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St West, Montreal, QC H3A 0B8, Canada;
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Ghaffari-Bohlouli P, Jafari H, Okoro OV, Alimoradi H, Nie L, Jiang G, Kakkar A, Shavandi A. Gas Therapy: Generating, Delivery, and Biomedical Applications. Small Methods 2024:e2301349. [PMID: 38193272 DOI: 10.1002/smtd.202301349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 12/11/2023] [Indexed: 01/10/2024]
Abstract
Oxygen (O2 ), nitric oxide (NO), carbon monoxide (CO), hydrogen sulfide (H2 S), and hydrogen (H2 ) with direct effects, and carbon dioxide (CO2 ) with complementary effects on the condition of various diseases are known as therapeutic gases. The targeted delivery and in situ generation of these therapeutic gases with controllable release at the site of disease has attracted attention to avoid the risk of gas poisoning and improve their performance in treating various diseases such as cancer therapy, cardiovascular therapy, bone tissue engineering, and wound healing. Stimuli-responsive gas-generating sources and delivery systems based on biomaterials that enable on-demand and controllable release are promising approaches for precise gas therapy. This work highlights current advances in the design and development of new approaches and systems to generate and deliver therapeutic gases at the site of disease with on-demand release behavior. The performance of the delivered gases in various biomedical applications is then discussed.
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Affiliation(s)
- Pejman Ghaffari-Bohlouli
- 3BIO-BioMatter, École polytechnique de Bruxelles, Université Libre de Bruxelles (ULB), Avenue F.D. Roosevelt, 50-CP 165/61, Brussels, 1050, Belgium
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec, H3A 0B8, Canada
| | - Hafez Jafari
- 3BIO-BioMatter, École polytechnique de Bruxelles, Université Libre de Bruxelles (ULB), Avenue F.D. Roosevelt, 50-CP 165/61, Brussels, 1050, Belgium
| | - Oseweuba Valentine Okoro
- 3BIO-BioMatter, École polytechnique de Bruxelles, Université Libre de Bruxelles (ULB), Avenue F.D. Roosevelt, 50-CP 165/61, Brussels, 1050, Belgium
| | - Houman Alimoradi
- 3BIO-BioMatter, École polytechnique de Bruxelles, Université Libre de Bruxelles (ULB), Avenue F.D. Roosevelt, 50-CP 165/61, Brussels, 1050, Belgium
| | - Lei Nie
- 3BIO-BioMatter, École polytechnique de Bruxelles, Université Libre de Bruxelles (ULB), Avenue F.D. Roosevelt, 50-CP 165/61, Brussels, 1050, Belgium
- College of Life Sciences, Xinyang Normal University, Xinyang, 464000, China
| | - Guohua Jiang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec, H3A 0B8, Canada
| | - Amin Shavandi
- 3BIO-BioMatter, École polytechnique de Bruxelles, Université Libre de Bruxelles (ULB), Avenue F.D. Roosevelt, 50-CP 165/61, Brussels, 1050, Belgium
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Joma N, Zhang I, Righetto GL, McKay L, Gran ER, Kakkar A, Maysinger D. Flavonoids Regulate Redox-Responsive Transcription Factors in Glioblastoma and Microglia. Cells 2023; 12:2821. [PMID: 38132142 PMCID: PMC10871111 DOI: 10.3390/cells12242821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 11/29/2023] [Accepted: 12/07/2023] [Indexed: 12/23/2023] Open
Abstract
The tumor microenvironment (TME) has emerged as a valuable therapeutic target in glioblastoma (GBM), as it promotes tumorigenesis via an increased production of reactive oxygen species (ROS). Immune cells such as microglia accumulate near the tumor and its hypoxic core, fostering tumor proliferation and angiogenesis. In this study, we explored the therapeutic potential of natural polyphenols with antioxidant and anti-inflammatory properties. Notably, flavonoids, including fisetin and quercetin, can protect non-cancerous cells while eliminating transformed cells (2D cultures and 3D tumoroids). We tested the hypothesis that fisetin and quercetin are modulators of redox-responsive transcription factors, for which subcellular location plays a critical role. To investigate the sites of interaction between natural compounds and stress-responsive transcription factors, we combined molecular docking with experimental methods employing proximity ligation assays. Our findings reveal that fisetin decreased cytosolic acetylated high mobility group box 1 (acHMGB1) and increased transcription factor EB (TFEB) abundance in microglia but not in GBM. Moreover, our results suggest that the most powerful modulator of the Nrf2-KEAP1 complex is fisetin. This finding is in line with molecular modeling and calculated binding properties between fisetin and Nrf2-KEAP1, which indicated more sites of interactions and stronger binding affinities than quercetin.
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Affiliation(s)
- Natali Joma
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, QC H3G 1Y6, Canada; (N.J.); (I.Z.); (G.L.R.); (E.R.G.)
| | - Issan Zhang
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, QC H3G 1Y6, Canada; (N.J.); (I.Z.); (G.L.R.); (E.R.G.)
| | - Germanna L. Righetto
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, QC H3G 1Y6, Canada; (N.J.); (I.Z.); (G.L.R.); (E.R.G.)
- Structural Genomics Consortium, University of Toronto, 101 College St, Toronto, ON M5G 1L7, Canada
| | - Laura McKay
- Department of Chemistry, McGill University, 801 Sherbrooke St W, Montreal, QC H3A 0B8, Canada; (L.M.); (A.K.)
| | - Evan Rizzel Gran
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, QC H3G 1Y6, Canada; (N.J.); (I.Z.); (G.L.R.); (E.R.G.)
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St W, Montreal, QC H3A 0B8, Canada; (L.M.); (A.K.)
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, QC H3G 1Y6, Canada; (N.J.); (I.Z.); (G.L.R.); (E.R.G.)
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Yong HW, Ferron M, Mecteau M, Mihalache-Avram T, Lévesque S, Rhéaume É, Tardif JC, Kakkar A. Single Functional Group Platform for Multistimuli Responsivities: Tertiary Amine for CO 2/pH/ROS-Triggered Cargo Release in Nanocarriers. Biomacromolecules 2023; 24:4064-4077. [PMID: 37647594 DOI: 10.1021/acs.biomac.3c00434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
The design of multistimuli-responsive soft nanoparticles (NPs) often presents synthetic complexities and limited breadth in exploiting changes surrounding physiological environments. Nanocarriers that could collectively take advantage of several endogenous stimuli can offer a powerful tool in nanomedicine. Herein, we have capitalized on the chemical versatility of a single tertiary amine to construct miktoarm polymer-based nanocarriers that respond to dissolved CO2, varied pH, reactive oxygen species (ROS), and ROS + CO2. Curcumin (Cur), an anti-inflammatory phytopharmaceutic, was loaded into micelles, and we validated the sensitivity of the tertiary amine in tuning Cur release. An in vitro evaluation indicated that Cur encapsulation strongly suppressed its toxicity at high concentrations, significantly inhibited nigericin-induced secretion of interleukin-1β by THP-1 macrophages, and the proportion of M2/M1 (anti-inflammatory/pro-inflammatory macrophages) was higher for Cur-loaded NPs than for free Cur. Our approach highlights the potential of a simple-by-design strategy in expanding the scope of polymeric NPs in drug delivery.
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Affiliation(s)
- Hui Wen Yong
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada
| | - Marine Ferron
- Research Center, Montréal Heart Institute, 5000 Belanger Street, Montréal, Québec H1T 1C8, Canada
| | - Mélanie Mecteau
- Research Center, Montréal Heart Institute, 5000 Belanger Street, Montréal, Québec H1T 1C8, Canada
| | - Teodora Mihalache-Avram
- Research Center, Montréal Heart Institute, 5000 Belanger Street, Montréal, Québec H1T 1C8, Canada
| | - Sylvie Lévesque
- Montréal Health Innovations Coordinating Center, 5000 Belanger Street, Montréal, Québec H1T 1C8, Canada
| | - Éric Rhéaume
- Research Center, Montréal Heart Institute, 5000 Belanger Street, Montréal, Québec H1T 1C8, Canada
- Department of Medicine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Jean-Claude Tardif
- Research Center, Montréal Heart Institute, 5000 Belanger Street, Montréal, Québec H1T 1C8, Canada
- Department of Medicine, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada
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Kakkar A, Kumar MH. Valve surgery in infective endocarditis. QJM 2023; 116:158. [PMID: 35353193 DOI: 10.1093/qjmed/hcac087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 03/27/2022] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Kakkar
- From the Department of Internal Medicine, Nehru Hospital 4th Floor, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - M H Kumar
- From the Department of Internal Medicine, Nehru Hospital 4th Floor, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
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Baghbanbashi M, Yong HW, Zhang I, Lotocki V, Yuan Z, Pazuki G, Maysinger D, Kakkar A. Stimuli-Responsive Miktoarm Polymer-Based Formulations for Fisetin Delivery and Regulatory Effects in Hyperactive Human Microglia. Macromol Biosci 2022; 22:e2200174. [PMID: 35817026 DOI: 10.1002/mabi.202200174] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/20/2022] [Indexed: 11/09/2022]
Abstract
Branched star polymers offer exciting opportunities in enhancing the efficacy of nanocarriers in delivering biologically active lipophilic agents. We demonstrate that the star polymeric architecture can be leveraged to yield soft nanoparticles of vesicular morphology with precisely located stimuli-sensitive chemical entities. Amphiphilic stars of AB2 (A = PEG, B = PCL) composition with/without oxidative stress or reduction responsive units at the core junction of A and B arms, are constructed using synthetic articulation. Fisetin, a natural flavonoid with remarkable anti-inflammatory and antioxidant properties, but of limited clinical value due to its poor aqueous solubility, was physically encapsulated into miktoarm star-derived aqueous polymersomes. We evaluated polymersomes and fisetin separately, and in combination, in human microglia (HMC3), to show if (i) polymersomes are toxic; (ii) fisetin reduces the abundance of reactive oxygen species (ROS); and (iii) fisetin modulates the activation of ERK1/2. These signaling molecules and pathways are implicated in inflammatory processes and cell survival. Fisetin, both incorporated and non-incorporated into polymersomes, reduced ROS and ERK1/2 phosphorylation in lipopolysaccharide-treated human microglia, normalizing excessive oxidative stress and ERK-mediated signaling. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Mojhdeh Baghbanbashi
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada.,Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Hafez Avenue, Tehran, 1591634311, Iran
| | - Hui Wen Yong
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada
| | - Issan Zhang
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| | - Victor Lotocki
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada
| | - Zhuoer Yuan
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| | - Gholamreza Pazuki
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Hafez Avenue, Tehran, 1591634311, Iran
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada
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Kakkar A, Jandial A, Suri V. Atrocious tetrad in paraquat poisoning. QJM 2022; 115:310-311. [PMID: 35294038 DOI: 10.1093/qjmed/hcac077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- A Kakkar
- Department of Internal Medicine, 4th Floor, Nehru Hospital, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - A Jandial
- Department of Clinical Haematology and Medical Oncology, 4th Floor, Nehru Hospital, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - V Suri
- Department of Internal Medicine, 4th Floor, Nehru Hospital, Post Graduate Institute of Medical Education and Research , Chandigarh, 160012, India
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Affiliation(s)
- A Kakkar
- Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, 4th floor, Nehru Hospital, Chandigarh, India
| | - M H Kumar
- Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, 4th floor, Nehru Hospital, Chandigarh, India
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Grzelczyk J, Fiurasek P, Kakkar A, Budryn G. Evaluation of the thermal stability of bioactive compounds in coffee beans and their fractions modified in the roasting process. Food Chem 2022; 387:132888. [PMID: 35397274 DOI: 10.1016/j.foodchem.2022.132888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 03/30/2022] [Accepted: 04/02/2022] [Indexed: 11/04/2022]
Abstract
Coffee is used as flavor or health-promoting additive in thermally processed food. In this study, ground coffee and freeze-dried coffee extracts were evaluated in terms of their thermal stabilities, and for the first time heat resistance of fractions (mono-, dichlorogenic acids and caffeine) with different roasting levels was evaluated. It observed that the degradation of green coffee bean ingredients began at 150 °C, and for the re-heated light and dark roasted, in the range of 171-188 °C. The lyophilized extracts were more stable and their degradation began around 160 °C. However, with the re-treatment (cooking, baking, frying) of the coffee extract fractions, the degradation of the monochlorogenic acids commenced at 114 °C, while for dichlorogenics at 108 °C and caffeine at 146 °C. Monochlorogenic acids in Robusta coffee showed high antioxidant activity (55-70%) and the highest content of fiber (13-17%). Coffee could be used to fortify food.
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Affiliation(s)
- Joanna Grzelczyk
- Institute of Food Technology and Analysis, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, 90-924 Lodz, Poland.
| | - Petr Fiurasek
- Department of Chemistry, Centre Québécois sur les Matériaux Fonctionnels/Québec Centre for Advanced Materials (CQMF/QCAM) McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
| | - Ashok Kakkar
- Department of Chemistry, Centre Québécois sur les Matériaux Fonctionnels/Québec Centre for Advanced Materials (CQMF/QCAM) McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
| | - Grażyna Budryn
- Institute of Food Technology and Analysis, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, 90-924 Lodz, Poland.
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Abstract
Self-assembly of amphiphilic macromolecules has provided an advantageous platform to address significant issues in a variety of areas, including biology. Such soft nanoparticles with a hydrophobic core and hydrophilic corona, referred to as micelles, have been extensively investigated for delivering lipophilic therapeutics by physical encapsulation. Polymeric vesicles or polymersomes with similarities in morphology to liposomes continue to play an essential role in understanding the behavior of cell membranes and, in addition, have offered opportunities in designing smart nanoformulations. With the evolution in synthetic methodologies to macromolecular precursors, the construction of such assemblies can now be modulated to tailor their properties to match desired needs. This review brings into focus the current state-of-the-art in the design of polymersomes using amphiphilic miktoarm star polymers through a detailed analysis of the synthesis of miktoarm star polymers with tuned lengths of varied polymeric arms, their self-assembly, and applications in drug delivery.
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Affiliation(s)
- Mojhdeh Baghbanbashi
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada.,Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran 1591634311, Iran
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada
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Affiliation(s)
- Hui Wen Yong
- Department of Chemistry McGill University Montréal QC Canada
| | - Ashok Kakkar
- Department of Chemistry McGill University Montréal QC Canada
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Mishra D, Kaur H, Roychoudhury A, Kakkar A. ROUND CELL MALIGNANCIES OF OROFACIAL REGION—A DIAGNOSTIC PERPLEXITY. Oral Surg Oral Med Oral Pathol Oral Radiol 2021. [DOI: 10.1016/j.oooo.2021.03.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kakkar A, Thakur R, Roy D, Thakar A, Sharma A. PROGNOSTIC IMPACT OF BRANDWEIN-GENSLER HISTOLOGIC RISK SCORE AND TUMOR-INFILTRATING LYMPHOCYTE SUBSETS IN ORAL SQUAMOUS CELL CARCINOMA. Oral Surg Oral Med Oral Pathol Oral Radiol 2021. [DOI: 10.1016/j.oooo.2021.03.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yong HW, Kakkar A. Nanoengineering Branched Star Polymer-Based Formulations: Scope, Strategies, and Advances. Macromol Biosci 2021; 21:e2100105. [PMID: 34117840 DOI: 10.1002/mabi.202100105] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/26/2021] [Indexed: 12/24/2022]
Abstract
Soft nanoparticles continue to offer a promising platform for the encapsulation and controlled delivery of poorly water-soluble drugs and help enhance their bioavailability at targeted sites. Linear amphiphilic block copolymers are the most extensively investigated in formulating delivery vehicles. However, more recently, there has been increasing interest in utilizing branched macromolecules for nanomedicine, as these have been shown to lower critical micelle concentrations, form particles of smaller dimensions, facilitate the inclusion of varied compositions and function-based entities, as well as provide prolonged and sustained release of cargo. In this review, it is aimed to discuss some of the key variables that are studied in tailoring branched architecture-based assemblies, and their influence on drug loading and delivery. By understanding structure-property relationships in these formulations, one can better design branched star polymers with suitable characteristics for efficient therapeutic interventions. The role played by polymer composition, chain architecture, crosslinking, stereocomplexation, compatibility between polymers and drugs, drug/polymer concentrations, and self-assembly methods in their performance as nanocarriers is highlighted.
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Affiliation(s)
- Hui Wen Yong
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Quebec, H3A 0B8, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Quebec, H3A 0B8, Canada
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17
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Lotocki V, Yazdani H, Zhang Q, Gran ER, Nyrko A, Maysinger D, Kakkar A. Miktoarm Star Polymers with Environment‐Selective ROS/GSH Responsive Locations: From Modular Synthesis to Tuned Drug Release through Micellar Partial Corona Shedding and/or Core Disassembly. Macromol Biosci 2021. [DOI: 10.1002/mabi.202170005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Kakkar A. Celebrating Todd Marder: 65th Birthday and His Contributions to Inorganic Chemistry. Molecules 2021; 26:776. [PMID: 33546127 PMCID: PMC7913161 DOI: 10.3390/molecules26040776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 11/17/2022] Open
Abstract
Professor Todd B [...].
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Affiliation(s)
- Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada
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19
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Zargarian D, Westcott SA, Kakkar A. Boron and beyond: celebrating Todd B. Marder's contributions to chemistry. NEW J CHEM 2021. [DOI: 10.1039/d1nj90104d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highlighting the remarkable impact that Prof. Marder's research has made in science.
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Affiliation(s)
- Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Stephen A. Westcott
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4K 2T6, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montréal, QC H3A 0B8, Canada
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20
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Lotocki V, Yazdani H, Zhang Q, Gran ER, Nyrko A, Maysinger D, Kakkar A. Miktoarm Star Polymers with Environment-Selective ROS/GSH Responsive Locations: From Modular Synthesis to Tuned Drug Release through Micellar Partial Corona Shedding and/or Core Disassembly. Macromol Biosci 2020; 21:e2000305. [PMID: 33620748 DOI: 10.1002/mabi.202000305] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/12/2020] [Indexed: 02/06/2023]
Abstract
Branched architectures with asymmetric polymeric arms provide an advantageous platform for the construction of tailored nanocarriers for therapeutic interventions. Simple and adaptable synthetic methodologies to amphiphilic miktoarm star polymers have been developed in which spatial location of reactive oxygen species (ROS) and glutathione (GSH) responsive entities is articulated to be on the corona shell surface or inside the core. The design of such architectures is facilitated through versatile building blocks and selected combinations of ring-opening polymerization, Steglich esterification, and alkyne-azide click reactions. Soft nanoparticles from aqueous self-assembly of these stimuli responsive miktoarm stars have low critical micelle concentrations and high drug loading efficiencies. Partial corona shedding upon response to ROS is accompanied by an increase in drug release, without significant changes to overall micelle morphology. The location of the GSH responsive unit at the core leads to micelle disassembly and complete drug release. Curcumin loaded soft nanoparticles show higher efficiencies in preventing ROS generation in extracellular and cellular environments, and in ROS scavenging in human glioblastoma cells. The ease in synthetic elaboration and an understanding of structure-property relationships in stimuli responsive nanoparticles offer a facile venue for well-controlled drug delivery, based on the extra- and intracellular concentrations of ROS and GSH.
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Affiliation(s)
- Victor Lotocki
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| | - Hossein Yazdani
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada.,Department of Chemistry, Shahid Beheshti University G.C., Tehran, 1983963113, Iran
| | - Qiaochu Zhang
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada.,Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| | - Evan Rizzel Gran
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| | - Anastasiia Nyrko
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
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21
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Sabourian P, Yazdani G, Ashraf SS, Frounchi M, Mashayekhan S, Kiani S, Kakkar A. Effect of Physico-Chemical Properties of Nanoparticles on Their Intracellular Uptake. Int J Mol Sci 2020; 21:ijms21218019. [PMID: 33126533 PMCID: PMC7662525 DOI: 10.3390/ijms21218019] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/24/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022] Open
Abstract
Cellular internalization of inorganic, lipidic and polymeric nanoparticles is of great significance in the quest to develop effective formulations for the treatment of high morbidity rate diseases. Understanding nanoparticle–cell interactions plays a key role in therapeutic interventions, and it continues to be a topic of great interest to both chemists and biologists. The mechanistic evaluation of cellular uptake is quite complex and is continuously being aided by the design of nanocarriers with desired physico-chemical properties. The progress in biomedicine, including enhancing the rate of uptake by the cells, is being made through the development of structure–property relationships in nanoparticles. We summarize here investigations related to transport pathways through active and passive mechanisms, and the role played by physico-chemical properties of nanoparticles, including size, geometry or shape, core-corona structure, surface chemistry, ligand binding and mechanical effects, in influencing intracellular delivery. It is becoming clear that designing nanoparticles with specific surface composition, and engineered physical and mechanical characteristics, can facilitate their internalization more efficiently into the targeted cells, as well as enhance the rate of cellular uptake.
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Affiliation(s)
- Parinaz Sabourian
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9465, Iran; (P.S.); (G.Y.); (S.S.A.); (S.M.)
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montréal, QC H3A 0B8, Canada
| | - Ghazaleh Yazdani
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9465, Iran; (P.S.); (G.Y.); (S.S.A.); (S.M.)
| | - Seyed Sajad Ashraf
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9465, Iran; (P.S.); (G.Y.); (S.S.A.); (S.M.)
| | - Masoud Frounchi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9465, Iran; (P.S.); (G.Y.); (S.S.A.); (S.M.)
- Correspondence: (M.F.); (A.K.)
| | - Shohreh Mashayekhan
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9465, Iran; (P.S.); (G.Y.); (S.S.A.); (S.M.)
| | - Sahar Kiani
- Department of Brain and Cognitive Sciences, Cell Science Research Center, ROYAN Institute for Stem Cell Biology and Technology, ACECR, Tehran 16635-148, Iran;
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montréal, QC H3A 0B8, Canada
- Correspondence: (M.F.); (A.K.)
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22
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Abstract
Nanostructured hyperbranched macromolecules have been extensively studied at the chemical, physical and morphological levels. The cellular structural and functional complexity of neural cells and their cross-talk have made it rather difficult to evaluate dendrimer effects in a mixed population of glial cells and neurons. Thus, we are at a relatively early stage of bench-to-bedside translation, and this is due mainly to the lack of data valuable for clinical investigations. It is only recently that techniques have become available that allow for analyses of biological processes inside the living cells, at the nanoscale, in real time. This review summarizes the essential properties of neural cells and dendrimers, and provides a cross-section of biological, pre-clinical and early clinical studies, where dendrimers were used as nanocarriers. It also highlights some examples of biological studies employing dendritic polyglycerol sulfates and their effects on glia and neurons. It is the aim of this review to encourage young scientists to advance mechanistic and technological approaches in dendrimer research so that these extremely versatile and attractive nanostructures gain even greater recognition in translational medicine.
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Affiliation(s)
- Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, QC H3G 1Y6, Canada;
| | - Qiaochu Zhang
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montreal, QC H3G 1Y6, Canada;
- Department of Chemistry, McGill University, 801 Sherbrooke St West, Montreal, QC H3A 0B8, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St West, Montreal, QC H3A 0B8, Canada
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Abstract
Architectural complexity has played a key role in enhancing the efficacy of nanocarriers for a variety of applications, including those in the biomedical field. With the continued evolution in designing macromolecules-based nanoparticles for drug delivery, the combination approach of using important features of linear polymers with dendrimers has offered an advantageous and viable platform. Such nanostructures, which are commonly referred to as telodendrimers, are hybrids of linear polymers covalently linked with different dendrimer generations and backbones. There is considerable variety in selection from widely studied linear polymers and dendrimers, which can help tune the overall composition of the resulting hybrid structures. This review highlights the advances in articulating syntheses of these macromolecules, and the contributions these are making in facilitating therapeutic administration. Limited progress has been made in the design and synthesis of these hybrid macromolecules, and it is through an understanding of their physicochemical properties and aqueous self-assembly that one can expect to fully exploit their potential in drug delivery.
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Affiliation(s)
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada;
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24
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Abstract
Delivering active pharmaceutical agents to disease sites using soft polymeric nanoparticles continues to be a topical area of research. It is becoming increasingly evident that the composition of amphiphilic macromolecules plays a significant role in developing efficient nanoformulations. Branched architectures with asymmetric polymeric arms emanating from a central core junction have provided a pivotal venue to tailor their key parameters. The build-up of miktoarm stars offers vast polymer arm tunability, aiding in the development of macromolecules with adjustable properties, and allows facile inclusion of endogenous stimulus-responsive entities. Miktoarm star-based micelles have been demonstrated to exhibit denser coronae, very low critical micelle concentrations, high drug loading contents, and sustained drug release profiles. With significant advances in chemical methodologies, synthetic articulation of miktoarm polymer architecture, and determination of their structure-property relationships, are now becoming streamlined. This is helping advance their implementation into formulating efficient therapeutic interventions. This review brings into focus the important discoveries in the syntheses of miktoarm stars of varied compositions, their aqueous self-assembly, and contributions their formulations are making in advancing the field of drug delivery.
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Affiliation(s)
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada;
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25
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Moeini M, Cloutier-Tremblay C, Lu X, Kakkar A, Lesage F. Cerebral tissue pO 2 response to treadmill exercise in awake mice. Sci Rep 2020; 10:13358. [PMID: 32770089 PMCID: PMC7414913 DOI: 10.1038/s41598-020-70413-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 07/29/2020] [Indexed: 12/16/2022] Open
Abstract
We exploited two-photon microscopy and Doppler optical coherence tomography to examine the cerebral blood flow and tissue pO2 response to forced treadmill exercise in awake mice. To our knowledge, this is the first study performing both direct measure of brain tissue pO2 during acute forced exercise and underlying microvascular response at capillary and non-capillary levels. We observed that cerebral perfusion and oxygenation are enhanced during running at 5 m/min compared to rest. At faster running speeds (10 and 15 m/min), decreasing trends in arteriolar and capillary flow speed were observed, which could be due to cerebral autoregulation and constriction of arterioles in response to blood pressure increase. However, tissue pO2 was maintained, likely due to an increase in RBC linear density. Higher cerebral oxygenation at exercise levels 5–15 m/min suggests beneficial effects of exercise in situations where oxygen delivery to the brain is compromised, such as in aging, atherosclerosis and Alzheimer Disease.
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Affiliation(s)
- Mohammad Moeini
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.,Research Center of Montreal Heart Institute, Montréal, QC, Canada
| | - Christophe Cloutier-Tremblay
- Biomedical Engineering Institute, École Polytechnique de Montréal, Succursale Centre-ville, P.O. Box 6079, Montréal, QC, H3C 3A7, Canada
| | - Xuecong Lu
- Research Center of Montreal Heart Institute, Montréal, QC, Canada.,Biomedical Engineering Institute, École Polytechnique de Montréal, Succursale Centre-ville, P.O. Box 6079, Montréal, QC, H3C 3A7, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, Montréal, QC, Canada
| | - Frédéric Lesage
- Research Center of Montreal Heart Institute, Montréal, QC, Canada. .,Biomedical Engineering Institute, École Polytechnique de Montréal, Succursale Centre-ville, P.O. Box 6079, Montréal, QC, H3C 3A7, Canada.
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26
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Yazdani H, Kaul E, Bazgir A, Maysinger D, Kakkar A. Telodendrimer-Based Macromolecular Drug Design using 1,3-Dipolar Cycloaddition for Applications in Biology. Molecules 2020; 25:E857. [PMID: 32075239 PMCID: PMC7071137 DOI: 10.3390/molecules25040857] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 12/20/2022] Open
Abstract
An architectural polymer containing hydrophobic isoxazole-based dendron and hydrophilic polyethylene glycol linear tail is prepared by a combination of the robust ZnCl2 catalyzed alkyne-nitrile oxide 1,3-dipolar cycloaddition and esterification chemistry. This water soluble amphiphilic telodendrimer acts as a macromolecular biologically active agent and shows concentration dependent reduction of glioblastoma (U251) cell survival.
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Affiliation(s)
- Hossein Yazdani
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montréal, QC H3A 0B8, Canada;
- Department of Chemistry, Shahid Beheshti University G.C., Tehran 1983963113, Iran;
| | - Esha Kaul
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montréal, QC H3G 1Y6, Canada;
| | - Ayoob Bazgir
- Department of Chemistry, Shahid Beheshti University G.C., Tehran 1983963113, Iran;
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montréal, QC H3G 1Y6, Canada;
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montréal, QC H3A 0B8, Canada;
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27
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Sabourian P, Ji J, Lotocki V, Moquin A, Hanna R, Frounchi M, Maysinger D, Kakkar A. Facile design of autogenous stimuli-responsive chitosan/hyaluronic acid nanoparticles for efficient small molecules to protein delivery. J Mater Chem B 2020; 8:7275-7287. [DOI: 10.1039/d0tb00772b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Chitosan is functionalized with oxidative stress-sensitive thioketal entities in a one-pot methodology, and self-assembled into drugs or protein loaded dual stimuli responsive nanoparticles, which kill glioblastoma cells and increase nerve outgrowth.
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Affiliation(s)
- Parinaz Sabourian
- Department of Chemistry
- McGill University
- Montréal
- Canada
- Department of Chemical and Petroleum Engineering
| | - Jeff Ji
- Department of Pharmacology and Therapeutics
- McGill University
- Montréal
- Canada
| | | | - Alexandre Moquin
- Department of Chemistry
- McGill University
- Montréal
- Canada
- Department of Pharmacology and Therapeutics
| | - Ramez Hanna
- Department of Chemistry
- McGill University
- Montréal
- Canada
| | - Masoud Frounchi
- Department of Chemical and Petroleum Engineering
- Sharif University of Technology
- Tehran
- Iran
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics
- McGill University
- Montréal
- Canada
| | - Ashok Kakkar
- Department of Chemistry
- McGill University
- Montréal
- Canada
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28
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Sabourian P, Tavakolian M, Yazdani H, Frounchi M, van de Ven TG, Maysinger D, Kakkar A. Stimuli-responsive chitosan as an advantageous platform for efficient delivery of bioactive agents. J Control Release 2020; 317:216-231. [DOI: 10.1016/j.jconrel.2019.11.029] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/22/2019] [Accepted: 11/23/2019] [Indexed: 12/31/2022]
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29
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Sharma A, Chaudhary M, Thakar A, Bhaskar S, Sikka K, Pramanik R, Biswas A, Singh C, Sahoo R, Deo S, Kumar R, Thulkar S, Kakkar A, Seth S, Sreenivas V. Concurrent chemotherapy and external radiation therapy: An open label non-inferiority phase III randomized controlled trial of weekly versus three weekly cisplatin and radical radiotherapy in locally advanced head and neck squamous cell carcinoma: CONCERT trial. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz252.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Moquin A, Sturn J, Zhang I, Ji J, von Celsing R, Vali H, Maysinger D, Kakkar A. Unraveling Aqueous Self-Assembly of Telodendrimers to Shed Light on Their Efficacy in Drug Encapsulation. ACS Appl Bio Mater 2019; 2:4515-4526. [DOI: 10.1021/acsabm.9b00643] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Alexandre Moquin
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Jessica Sturn
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Issan Zhang
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Jeff Ji
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Richard von Celsing
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Hojatollah Vali
- Department of Anatomy and Cell Biology, McGill University, 3640 University Street, Montreal, Quebec H3A 0C7, Canada
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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31
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Tavakolian M, Lerner J, Medina Tovar F, Frances J, van de Ven TG, Kakkar A. Dendrimer directed assembly of dicarboxylated hairy nanocellulose. J Colloid Interface Sci 2019; 541:444-453. [DOI: 10.1016/j.jcis.2019.01.100] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 02/07/2023]
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32
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Moquin A, Hanna R, Liang T, Erguven H, Gran ER, Arndtsen BA, Maysinger D, Kakkar A. PEG-conjugated pyrrole-based polymers: one-pot multicomponent synthesis and self-assembly into soft nanoparticles for drug delivery. Chem Commun (Camb) 2019; 55:9829-9832. [DOI: 10.1039/c9cc04000e] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A simple one-pot methodology provides easy access to amphiphilic PEG–pyrrole backbone polymers, which self-assemble into soft nanoparticles enabling efficient drug loading/sustained release and can be detected inside cells.
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Affiliation(s)
- Alexandre Moquin
- Department of Chemistry
- McGill University
- Montreal
- Canada
- Department of Pharmacology and Therapeutics
| | - Ramez Hanna
- Department of Chemistry
- McGill University
- Montreal
- Canada
| | - Tongyue Liang
- Department of Chemistry
- McGill University
- Montreal
- Canada
| | | | - Evan Rizzel Gran
- Department of Pharmacology and Therapeutics
- McGill University
- Montreal
- Canada
| | | | - Dusica Maysinger
- Department of Pharmacology and Therapeutics
- McGill University
- Montreal
- Canada
| | - Ashok Kakkar
- Department of Chemistry
- McGill University
- Montreal
- Canada
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33
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Abstract
Gold nanostructures that can be synthetically articulated to adapt diverse morphologies, offer a versatile platform and tunable properties for applications in a variety of areas, including biomedicine and diagnostics. Among several conformational architectures, gold nanoshells provide a highly advantageous combination of properties that can be fine-tuned in designing single or multi-purpose nanomaterials, especially for applications in biology. One of the important parameters for evaluating the efficacy of gold nano-architectures is their reproducible synthesis and surface functionalization with desired moieties. A variety of methods now exist that allow fabrication and chemical manipulation of their structure and resulting properties. This review article provides an overview and a discussion of synthetic methodologies to a diverse range of gold nanoshells, and a brief summary of surface functionalization and characterization methods employed to evaluate their overall composition.
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Affiliation(s)
- Yu-Chen Wang
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
| | - Éric Rhéaume
- Research Center, Montreal Heart Institute, 5000 Belanger Street, Montreal, QC H1T 1C8, Canada.
| | - Frédéric Lesage
- Research Center, Montreal Heart Institute, 5000 Belanger Street, Montreal, QC H1T 1C8, Canada.
- Department of Electrical Engineering Ecole Polytechnique de Montreal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
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34
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Sheikhi A, Olsson ALJ, Tufenkji N, Kakkar A, van de Ven TGM. Overcoming Interfacial Scaling Using Engineered Nanocelluloses: A QCM-D Study. ACS Appl Mater Interfaces 2018; 10:34553-34560. [PMID: 30203958 DOI: 10.1021/acsami.8b07435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nucleation of sparingly soluble species, such as the inorganic salts of calcium, magnesium, and phosphorous, followed by their growth at solid-liquid interfaces has turned into a major concern in water-based industries. Increased resistance against heat, mass, and momentum transfer is the main drawback of the so-called scaling phenomenon. Although phosphorous-, nitrogen-, and sulfur-based antiscaling macromolecules offer adequate antiscaling performance, their potential negative environmental impacts render them less desirable. Despite recent efforts in developing green antiscalants, there has been no promising green solution based on biomass due to its chemical inertness. Here, we use quartz crystal microbalance with dissipation monitoring (QCM-D) to evaluate the real-time performance of an emerging family of nanoengineered anionic hairy cellulose crystals, bearing dicarboxylated amorphous cellulose chains, with a charge density of more than 5.5 mequiv per g, in preventing the nucleation and growth of calcium carbonate, the most common industrial scale. Remarkably, a CaCO3 mass deposition rate ∼0 (complete scale inhibition) is obtained when less than 10 ppm of the hairy nanocellulose is added to an already scaled surface under a harsh supersaturated condition at 50 °C. Motivated by their threshold antiscaling effect, we show that coating planar silica surfaces with hairy nanocelluloses may result in scale-resistant interfaces. This research envisions how engineered hairy nanocelluloses may have practical implications for developing scale-resistant interfaces based on the most abundant biopolymer in the world.
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Affiliation(s)
| | - Adam L J Olsson
- Department of Chemical Engineering , McGill University , 3610 University Street , Montreal , QC H3A 0C5 , Canada
| | - Nathalie Tufenkji
- Department of Chemical Engineering , McGill University , 3610 University Street , Montreal , QC H3A 0C5 , Canada
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Nambirajan A, Longchar M, Mallick S, Kakkar A, Madan K, Mathur S, Jain D. P1.05-11 Role of EBUS-TBNA in Evaluation of Mediastinal Lymphadenopathy and Masses in Patients with Known or Suspected Extra-Pulmonary Malignancies. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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36
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Moeini M, Lu X, Avti PK, Damseh R, Bélanger S, Picard F, Boas D, Kakkar A, Lesage F. Compromised microvascular oxygen delivery increases brain tissue vulnerability with age. Sci Rep 2018; 8:8219. [PMID: 29844478 PMCID: PMC5974237 DOI: 10.1038/s41598-018-26543-w] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 05/16/2018] [Indexed: 11/22/2022] Open
Abstract
Despite the possible role of impaired cerebral tissue oxygenation in age-related cognition decline, much is still unknown about the changes in brain tissue pO2 with age. Using a detailed investigation of the age-related changes in cerebral tissue oxygenation in the barrel cortex of healthy, awake aged mice, we demonstrate decreased arteriolar and tissue pO2 with age. These changes are exacerbated after middle-age. We further uncovered evidence of the presence of hypoxic micro-pockets in the cortex of awake old mice. Our data suggests that from young to middle-age, a well-regulated capillary oxygen supply maintains the oxygen availability in cerebral tissue, despite decreased tissue pO2 next to arterioles. After middle-age, due to decreased hematocrit, reduced capillary density and higher capillary transit time heterogeneity, the capillary network fails to compensate for larger decreases in arterial pO2. The substantial decrease in brain tissue pO2, and the presence of hypoxic micro-pockets after middle-age are of significant importance, as these factors may be related to cognitive decline in elderly people.
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Affiliation(s)
- Mohammad Moeini
- Biomedical Engineering Institute, École Polytechnique de Montréal, Montréal, QC, Canada.,Research Center of Montreal Heart Institute, Montréal, QC, Canada.,Department of Chemistry, McGill University, Montréal, QC, Canada
| | - Xuecong Lu
- Biomedical Engineering Institute, École Polytechnique de Montréal, Montréal, QC, Canada.,Research Center of Montreal Heart Institute, Montréal, QC, Canada
| | - Pramod K Avti
- Biomedical Engineering Institute, École Polytechnique de Montréal, Montréal, QC, Canada.,Research Center of Montreal Heart Institute, Montréal, QC, Canada.,Department of Biophysics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Rafat Damseh
- Biomedical Engineering Institute, École Polytechnique de Montréal, Montréal, QC, Canada
| | - Samuel Bélanger
- Biomedical Engineering Institute, École Polytechnique de Montréal, Montréal, QC, Canada.,Research Center of Montreal Heart Institute, Montréal, QC, Canada
| | - Frédéric Picard
- Centre de Recherche de l'Institut Universitaire de Cardiologie et Pneumologie de Québec (IUCPQ), Québec, QC, Canada
| | - David Boas
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.,Biomedical Engineering Department, College of Engineering, Boston University, Boston, MA, USA
| | - Ashok Kakkar
- Department of Chemistry, McGill University, Montréal, QC, Canada
| | - Frédéric Lesage
- Biomedical Engineering Institute, École Polytechnique de Montréal, Montréal, QC, Canada. .,Research Center of Montreal Heart Institute, Montréal, QC, Canada.
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Abstract
Designing therapeutics is a process with many challenges. Even if the first hurdle - designing a drug that modulates the action of a particular biological target in vitro - is overcome, selective delivery to that target in vivo presents a major barrier. Side-effects can, in many cases, result from the need to use higher doses without targeted delivery. However, the established use of macromolecules to encapsulate or conjugate drugs can provide improved delivery, and stands to enable better therapeutic outcomes. In this Review, we discuss how drug delivery approaches have evolved alongside our ability to prepare increasingly complex macromolecular architectures. We examine how this increased complexity has overcome the challenges of drug delivery and discuss its potential for fulfilling unmet needs in nanomedicine.
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Affiliation(s)
- Ashok Kakkar
- Harvard-MIT Division of Health Sciences, Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, USA
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada
| | - Giovanni Traverso
- Harvard-MIT Division of Health Sciences, Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School
| | - Omid C Farokhzad
- Center for Nanomedicine and Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Robert Langer
- Harvard-MIT Division of Health Sciences, Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, USA
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38
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Choi J, Moquin A, Bomal E, Na L, Maysinger D, Kakkar A. Telodendrimers for Physical Encapsulation and Covalent Linking of Individual or Combined Therapeutics. Mol Pharm 2017; 14:2607-2615. [PMID: 28520445 DOI: 10.1021/acs.molpharmaceut.7b00019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
New therapeutics for glioblastoma multiforme and our ability to deliver them using efficient nanocarriers constitute topical areas of research. We report a comparative study of temozolomide and quercetin in the treatment of glioblastoma (GBM) in three-dimensions, and their incorporation into micelles obtained from synthetically articulated architectural copolymers, and a commercially available linear polymer poly(ethylene glycol)-poly(lactic-co-glycolic acid) (PEG-PLGA). A versatile synthetic methodology to telodendrimers, which can be easily adapted to the needs of other therapeutic interventions, is presented. These dendritic block copolymers self-assemble into micelles and offer a platform for single or combination drug therapy. Telodendrimer micelles loaded with quercetin did not exhibit superior cell killing effect over the free drug, but acetazolamide, an inhibitor carbonic anhydrase IX, significantly reduced GBM cell viability in 3D spheroids. Results from these studies show that high loading of drugs into telodendrimer micelles requires a physical fit between the biologically active agent and telodendrimer nanocarrier, and points toward new possibilities for incorporation of chemotherapeutic and other agents to enhance their effectiveness.
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Affiliation(s)
- Jason Choi
- Department of Pharmacology and Therapeutics, McGill University , 3655 Promenade Sir William Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Alexandre Moquin
- Department of Pharmacology and Therapeutics, McGill University , 3655 Promenade Sir William Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Enzo Bomal
- Department of Chemistry, McGill University , 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8 Canada
| | - Li Na
- Department of Chemistry, McGill University , 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8 Canada
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics, McGill University , 3655 Promenade Sir William Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University , 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8 Canada
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Lam T, Avti PK, Pouliot P, Tardif JC, Rhéaume É, Lesage F, Kakkar A. Surface engineering of SPIONs: role of phosphonate ligand multivalency in tailoring their efficacy. Nanotechnology 2016; 27:415602. [PMID: 27608753 DOI: 10.1088/0957-4484/27/41/415602] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report the design of scaffolds containing mono-, bis-, and tris-phosphonate coordinating groups, and a polyethylene glycol chain, for stabilizing superparamagnetic iron oxide nanoparticles (SPIONs), using simple and versatile chemistry. We demonstrate that the number of anchoring phosphonate sites on the ligand influence the colloidal stability, magnetic and biological properties of SPIONs, and the latter do not solely depend on attaching moieties that can enhance their aqueous dispersion. These parameters can be tailored by the number of conjugation sites on the ligand, as evidenced from dynamic light scattering at various salt concentrations, magnetic relaxivities and cell viability studies.
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Affiliation(s)
- Tina Lam
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada
| | - Pramod K Avti
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada
- Department of Electrical Engineering, Ecole Polytechnique de Montreal, C.P. 6079 succ. Centre-Ville, Montreal, Quebec H3C 3A7, Canada
- Research Centre, Montreal Heart Institute, 5000 Belanger Street, Montreal, Quebec H1T 1C8, Canada
| | - Philippe Pouliot
- Department of Electrical Engineering, Ecole Polytechnique de Montreal, C.P. 6079 succ. Centre-Ville, Montreal, Quebec H3C 3A7, Canada
| | - Jean-Claude Tardif
- Research Centre, Montreal Heart Institute, 5000 Belanger Street, Montreal, Quebec H1T 1C8, Canada
- Department of Medicine, Universite de Montreal, Montreal, Quebec, Canada
| | - Éric Rhéaume
- Research Centre, Montreal Heart Institute, 5000 Belanger Street, Montreal, Quebec H1T 1C8, Canada
- Department of Medicine, Universite de Montreal, Montreal, Quebec, Canada
| | - Frederic Lesage
- Department of Electrical Engineering, Ecole Polytechnique de Montreal, C.P. 6079 succ. Centre-Ville, Montreal, Quebec H3C 3A7, Canada
- Research Centre, Montreal Heart Institute, 5000 Belanger Street, Montreal, Quebec H1T 1C8, Canada
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada
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Gibbs H, Kakkar A. Changing Treatment Patterns in Atrial Fibrillation in Australia: Results From the Global Anticoagulation in the Field (GARFIELD) Registry. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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41
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Lam T, Avti PK, Pouliot P, Maafi F, Tardif JC, Rhéaume É, Lesage F, Kakkar A. Fabricating Water Dispersible Superparamagnetic Iron Oxide Nanoparticles for Biomedical Applications through Ligand Exchange and Direct Conjugation. Nanomaterials (Basel) 2016; 6:E100. [PMID: 28335228 PMCID: PMC5302624 DOI: 10.3390/nano6060100] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 04/29/2016] [Accepted: 05/13/2016] [Indexed: 12/20/2022]
Abstract
Stable superparamagnetic iron oxide nanoparticles (SPIONs), which can be easily dispersed in an aqueous medium and exhibit high magnetic relaxivities, are ideal candidates for biomedical applications including contrast agents for magnetic resonance imaging. We describe a versatile methodology to render water dispersibility to SPIONs using tetraethylene glycol (TEG)-based phosphonate ligands, which are easily introduced onto SPIONs by either a ligand exchange process of surface-anchored oleic-acid (OA) molecules or via direct conjugation. Both protocols confer good colloidal stability to SPIONs at different NaCl concentrations. A detailed characterization of functionalized SPIONs suggests that the ligand exchange method leads to nanoparticles with better magnetic properties but higher toxicity and cell death, than the direct conjugation methodology.
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Affiliation(s)
- Tina Lam
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
| | - Pramod K Avti
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Philippe Pouliot
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Foued Maafi
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Jean-Claude Tardif
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
- Department of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada.
| | - Éric Rhéaume
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
- Department of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada.
| | - Frédéric Lesage
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
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42
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Lam T, Avti PK, Pouliot P, Tardif JC, Rhéaume É, Lesage F, Kakkar A. Magnetic resonance imaging/fluorescence dual modality protocol using designed phosphonate ligands coupled to superparamagnetic iron oxide nanoparticles. J Mater Chem B 2016; 4:3969-3981. [PMID: 32263096 DOI: 10.1039/c6tb00821f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A simple and versatile methodology to tailor the surface of superparamagnetic iron oxide nanoparticles (SPIONs), and render additional fluorescence capability to these contrast agents, is reported. The dual modality imaging protocol was developed by designing multi-functional scaffolds with a combination of orthogonal moieties for aqueous dispersion and stealth, to covalently link them to SPIONs, and carry out post-functionalization of nanoparticles. SPIONs stabilized with ligands incorporating surface-anchoring phosphonate groups, ethylene glycol backbone for aqueous dispersion, and free surface exposed OH moieties were coupled to near-infrared dye Cy5.5A. Our results demonstrate that design of multi-tasking ligands with desired combination and spatial distribution of functions provides an ideal platform to construct highly efficient dual imaging probes with balanced magnetic, optical and cell viability properties.
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Affiliation(s)
- Tina Lam
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada.
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Jakkinaboina S, Varma M, Kakkar A, Peddapyata P, Aleem M, Paul S. Analysis of the outcome of liver transplantation patients in india - a prospective observational study. Intensive Care Med Exp 2015. [PMCID: PMC4797849 DOI: 10.1186/2197-425x-3-s1-a697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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44
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Sharma A, Kakkar A. Designing Dendrimer and Miktoarm Polymer Based Multi-Tasking Nanocarriers for Efficient Medical Therapy. Molecules 2015; 20:16987-7015. [PMID: 26393546 PMCID: PMC6332070 DOI: 10.3390/molecules200916987] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/09/2015] [Accepted: 09/11/2015] [Indexed: 11/28/2022] Open
Abstract
To address current complex health problems, there has been an increasing demand for smart nanocarriers that could perform multiple complimentary biological tasks with high efficacy. This has provoked the design of tailor made nanocarriers, and the scientific community has made tremendous effort in meeting daunting challenges associated with synthetically articulating multiple functions into a single scaffold. Branched and hyper-branched macromolecular architectures have offered opportunities in enabling carriers with capabilities including location, delivery, imaging etc. Development of simple and versatile synthetic methodologies for these nanomaterials has been the key in diversifying macromolecule based medical therapy and treatment. This review highlights the advancement from conventional "only one function" to multifunctional nanomedicine. It is achieved by synthetic elaboration of multivalent platforms in miktoarm polymers and dendrimers by physical encapsulation, covalent linking and combinations thereof.
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Affiliation(s)
- Anjali Sharma
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
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Moquin A, Sharma A, Cui Y, Lau A, Maysinger D, Kakkar A. Asymmetric AB3Miktoarm Star Polymers: Synthesis, Self-Assembly, and Study of Micelle Stability Using AF4for Efficient Drug Delivery. Macromol Biosci 2015; 15:1744-54. [DOI: 10.1002/mabi.201500186] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 07/08/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Alexandre Moquin
- Department of Pharmacology and Therapeutics; McGill University; 3655 Promenade Sir William Osler, Montreal Quebec H3G 1Y6 Canada
| | - Anjali Sharma
- Department of Chemistry; McGill University; 801 Sherbrooke St. West, Montreal Quebec H3A 0B8 Canada
| | - Yiming Cui
- Department of Pharmacology and Therapeutics; McGill University; 3655 Promenade Sir William Osler, Montreal Quebec H3G 1Y6 Canada
| | - Anthony Lau
- Department of Chemistry; McGill University; 801 Sherbrooke St. West, Montreal Quebec H3A 0B8 Canada
| | - Dusica Maysinger
- Department of Pharmacology and Therapeutics; McGill University; 3655 Promenade Sir William Osler, Montreal Quebec H3G 1Y6 Canada
| | - Ashok Kakkar
- Department of Chemistry; McGill University; 801 Sherbrooke St. West, Montreal Quebec H3A 0B8 Canada
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Kakkar A, Jain D, Mathur SR, Iyer VK, Sarkar C, Ranjan Dash N. Atypical cytological features of a solid pseudopapillary neoplasm of the pancreas metastatic to the liver. Cytopathology 2015; 27:218-20. [PMID: 26104297 DOI: 10.1111/cyt.12256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- A Kakkar
- Department of Pathology and Gastrointestinal Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - D Jain
- Department of Pathology and Gastrointestinal Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - S R Mathur
- Department of Pathology and Gastrointestinal Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - V K Iyer
- Department of Pathology and Gastrointestinal Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - C Sarkar
- Department of Pathology and Gastrointestinal Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - N Ranjan Dash
- Department of Pathology and Gastrointestinal Surgery, All India Institute of Medical Sciences, New Delhi, India
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Sharma M, Kumari K, Kakkar A, Sarkar C, Suri V, Chandra S. SG-02 * ROLE OF mTOR SIGNALLING PATHWAY IN THE PATHOGENESIS OF SUBEPENDYMAL GIANT CELL ASTROCYTOMAS. Neuro Oncol 2015. [DOI: 10.1093/neuonc/nov061.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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48
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Raskob GE, Angchaisuksiri P, Blanco AN, Buller H, Gallus A, Hunt BJ, Hylek EM, Kakkar A, Konstantinides SV, McCumber M, Ozaki Y, Wendelboe A, Weitz JI. Thrombosis: a major contributor to global disease burden. Arterioscler Thromb Vasc Biol 2015; 34:2363-71. [PMID: 25304324 DOI: 10.1161/atvbaha.114.304488] [Citation(s) in RCA: 524] [Impact Index Per Article: 58.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Thrombosis is the common pathology underlying ischemic heart disease, ischemic stroke, and venous thromboembolism (VTE). The Global Burden of Disease Study 2010 (GBD 2010) documented that ischemic heart disease and stroke collectively caused 1 in 4 deaths worldwide. GBD 2010 did not report data for VTE as a cause of death and disability. OBJECTIVE To review the literature on the global burden of disease caused by VTE. APPROACH AND RESULTS We performed a systematic review of the literature on the global disease burden because of VTE in low-, middle-, and high-income countries. Studies from Western Europe, North America, Australia, and Southern Latin America (Argentina) yielded consistent results with annual incidences ranging from 0.75 to 2.69 per 1000 individuals in the population. The incidence increased to between 2 and 7 per 1000 among those aged ≥70 years. Although the incidence is lower in individuals of Chinese and Korean ethnicity, their disease burden is not low because of population aging. VTE associated with hospitalization was the leading cause of disability-adjusted life-years lost in low- and middle-income countries, and second in high-income countries, responsible for more disability-adjusted life-years lost than nosocomial pneumonia, catheter-related blood stream infections, and adverse drug events. CONCLUSIONS VTE causes a major burden of disease across low-, middle-, and high-income countries. More detailed data on the global burden of VTE should be obtained to inform policy and resource allocation in health systems and to evaluate whether improved use of preventive measures will reduce the burden.
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Affiliation(s)
- G E Raskob
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.).
| | - P Angchaisuksiri
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - A N Blanco
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - H Buller
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - A Gallus
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - B J Hunt
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - E M Hylek
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - A Kakkar
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - S V Konstantinides
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - M McCumber
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - Y Ozaki
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - A Wendelboe
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
| | - J I Weitz
- From the College of Public Health, University of Oklahoma Health Sciences Center (G.E.R., M.M., A.W.); Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.A.); División Hemostasia, Academia Nacional de Medicina, Buenos Aires, Argentina (A.N.B.); Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (H.B.); SA Pathology-Department of Hematology, Flinders Medical Center, Adelaide, South Australia, Australia (A.G.); Thrombosis and Thrombophilia Centre, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom (B.J.H.); Boston University School of Medicine, MA (E.M.H.); Thrombosis Research Institute, London, United Kingdom (A.K.); Center for Thrombosis and Hemostasis, Johannes Gutenberg University, Mainz, Germany (S.V.K.); Department of Laboratory Medicine, University of Yamanashi, Tamaho, Yamanashi, Japan (Y.O.); and McMaster University and Thrombosis and Atherosclerosis Research Institute, Hamilton, Ontario, Canada (J.I.W.)
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Bédard M, Avti PK, Lam T, Rouleau L, Tardif JC, Rhéaume É, Lesage F, Kakkar A. Conjugation of multivalent ligands to gold nanoshells and designing a dual modality imaging probe. J Mater Chem B 2015; 3:1788-1800. [PMID: 32262252 DOI: 10.1039/c4tb01811g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Design and synthesis of branched tetraethylene glycol (TEG) based ligands for subsequent conjugation to gold nanoshells are reported. TEG enhances the aqueous solubility of hollow gold nanoshells (HAuNShs), and the branched architecture provides stability. An examination of the supernatant of the surface displacement reaction shows that the structure of the ligand plays an important role in the functionalization of HAuNShs. The binding of multivalent ligands leads to rupturing of the gold nanoshell architecture; most probably due to the large dendron not compensating the replacement of small citrate capping agents. The construction of a probe with dual imaging capabilities is demonstrated by covalent linking of a dendron containing Cy5.5A dye to gold nanoshells. It leads to fluorescence quenching of Cy5.5A by the gold nanoshells, as evidenced in solution and in cellular internalization studies with J774 and bEnd.3 cells.
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Affiliation(s)
- Mathieu Bédard
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada.
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50
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Sharma A, Mejía D, Regnaud A, Uhlig N, Li CJ, Maysinger D, Kakkar A. Combined A 3 Coupling and Click Chemistry Approach for the Synthesis of Dendrimer-Based Biological Tools. ACS Macro Lett 2014; 3:1079-1083. [PMID: 35610796 DOI: 10.1021/mz5006298] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report a versatile approach in which two highly efficient chemical reactions, multicomponent A3 coupling and alkyne-azide click chemistry, are combined to construct dendrimer-based tools for applications in biology. Using a convergent approach, dendrons with desired architecture and an alkyne at the focal point are first assembled and then stitched together via multicomponent A3 coupling reaction. The desired functional groups, including a stealth agent, imaging dye, and drug molecules, could be easily covalently linked to the surfaces of these hyperbranched macromolecules using alkyne-azide click chemistry. These A3-click dendrimers are noncytotoxic at concentrations as high as 1 μM and in fact reduce the toxicity of the drug. The dye-coated dendrimers specifically target and localize in lipid droplets. This unison methodology represents an attractive chemical strategy in exploiting the untapped potential of A3 coupling and facilitating the development of nanodevices for imaging and drug delivery.
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Affiliation(s)
- Anjali Sharma
- Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Diana Mejía
- Department
of Pharmacology and Therapeutics, McGill University, 3655 Promenade
Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Aurélie Regnaud
- Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Nick Uhlig
- Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Dusica Maysinger
- Department
of Pharmacology and Therapeutics, McGill University, 3655 Promenade
Sir-William-Osler, Montreal, Quebec H3G 1Y6, Canada
| | - Ashok Kakkar
- Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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