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Sharma A, Dutta T, Srivastava A. Underwater Adhesives from Redox-Responsive Polyplexes of Thiolated Polyamide Polyelectrolytes. Chemistry 2024; 30:e202302157. [PMID: 37751057 DOI: 10.1002/chem.202302157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/23/2023] [Accepted: 09/26/2023] [Indexed: 09/27/2023]
Abstract
We report the fabrication of optically clear underwater adhesives using polyplexes of oppositely charged partially-thiolated polyamide polyelectrolytes (TPEs). The thiol content of the constituent PEs was varied to assess its influence on the adhesive properties of the resulting glues. These catechol-free, redox-responsive TPE-adhesives were formulated in aquo and exhibited high optical transparency and strong adhesion even on submerged or moist surfaces of diverse polar substrates such as glass, aluminium, wood, and bone pieces. The adhesives could be cured under water through oxidative disulphide crosslinking of the constituent TPEs. The polyamide backbone provided multi-site H-bonding interactions with the substrates while the disulphide crosslinking provided the cohesive strength to the glue. Strong adhesion of mammalian bones (load bearing capacity upto 7 kg/cm2 ) was achieved using the adhesive containing 30 mol % thiol residues. Higher pH and use of oxidants such as povidone-iodine solution enhanced the curing rate of the adhesives, and so did the use of Tris buffer instead of Phosphate buffer. The porous architecture of the adhesive and its progressive degradation in aqueous medium over the course of three weeks bode well for diverse biomedical applications where temporary adhesion of tissues is required.
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Affiliation(s)
- Aashish Sharma
- Department of Chemistry, Indian Institute of Science Education Research, Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, 462066, India
- Current Affiliation: School of Medical and Allied Sciences, G.D. Goenka University, Sohna Road, Gurugram, Haryana, 122103, India
| | - Tanmay Dutta
- Department of Chemistry, Indian Institute of Science Education Research, Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, 462066, India
| | - Aasheesh Srivastava
- Department of Chemistry, Indian Institute of Science Education Research, Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, 462066, India
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2
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Ghaemi A, Vakili-Azghandi M, Abnous K, Taghdisi SM, Ramezani M, Alibolandi M. Oral non-viral gene delivery platforms for therapeutic applications. Int J Pharm 2023; 642:123198. [PMID: 37406949 DOI: 10.1016/j.ijpharm.2023.123198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 06/18/2023] [Accepted: 07/01/2023] [Indexed: 07/07/2023]
Abstract
Since gene therapy can regulate gene and protein expression directly, it has a great potential to prevent or treat a variety of genetic or acquired diseases through vaccines such as viral infections, cystic fibrosis, and cancer. Owing to their high efficacy, in vivo gene therapy trials are usually conducted intravenously, which is usually costly and invasive. There are several advantages to oral drug administration over intravenous injections, such as better patient compliance, ease of use, and lower cost. However, gene therapy is successful if the oligonucleotides can cross the cell membrane easily and reach the nucleus after the endosomal escape. In order to accomplish this task and deliver the cargo to the intended location, appropriate delivery systems should be introduced. This review summarizes oral delivery systems developed for effective gene delivery, vaccination, and treatment of various diseases. Studies have also shown that oral delivery approaches are potentially applicable to treat various diseases, especially inflammatory bowel disease, stomach, and colorectal cancers. Also, the current review provides an update overview on the development of non-viral and oral gene delivery techniques for gene therapy and vaccination purposes.
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Affiliation(s)
- Asma Ghaemi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Masoume Vakili-Azghandi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khalil Abnous
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Mohammad Taghdisi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran; Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Ramezani
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Mona Alibolandi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
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Molnar K, Voniatis C, Feher D, Szabo G, Varga R, Reiniger L, Juriga D, Kiss Z, Krisch E, Weber G, Ferencz A, Varga G, Zrinyi M, Nagy KS, Jedlovszky-Hajdu A. Poly(amino acid) based fibrous membranes with tuneable in vivo biodegradation. PLoS One 2021; 16:e0254843. [PMID: 34388163 PMCID: PMC8362958 DOI: 10.1371/journal.pone.0254843] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/04/2021] [Indexed: 11/19/2022] Open
Abstract
In this work two types of biodegradable polysuccinimide-based, electrospun fibrous membranes are presented. One contains disulfide bonds exhibiting a shorter (3 days) in vivo biodegradation time, while the other one has alkyl crosslinks and a longer biodegradation time (more than 7 days). According to the mechanical measurements, the tensile strength of the membranes is comparable to those of soft the connective tissues and visceral tissues. Furthermore, the suture retention test suggests, that the membranes would withstand surgical handling and in vivo fixation. The in vivo biocompatibility study demonstrates how membranes undergo in vivo hydrolysis and by the 3rd day they become poly(aspartic acid) fibrous membranes, which can be then enzymatically degraded. After one week, the disulfide crosslinked membranes almost completely degrade, while the alkyl-chain crosslinked ones mildly lose their integrity as the surrounding tissue invades them. Histopathology revealed mild acute inflammation, which diminished to a minimal level after seven days.
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Affiliation(s)
- Kristof Molnar
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
- Department of Food, Agricultural and Biological Engineering, College of Food, Agricultural, and Environmental Sciences, The Ohio State University, Wooster, OH, United States of America
| | - Constantinos Voniatis
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
- Department of Surgical Research and Techniques, Semmelweis University, Budapest, Hungary
| | - Daniella Feher
- Department of Surgical Research and Techniques, Semmelweis University, Budapest, Hungary
| | - Gyorgyi Szabo
- Department of Surgical Research and Techniques, Semmelweis University, Budapest, Hungary
| | - Rita Varga
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
| | - Lilla Reiniger
- 1 Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - David Juriga
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
| | - Zoltan Kiss
- Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary
- Biomechanical Research Center, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary
| | - Eniko Krisch
- Department of Food, Agricultural and Biological Engineering, College of Food, Agricultural, and Environmental Sciences, The Ohio State University, Wooster, OH, United States of America
| | - Gyorgy Weber
- Department of Surgical Research and Techniques, Semmelweis University, Budapest, Hungary
| | - Andrea Ferencz
- Department of Surgical Research and Techniques, Semmelweis University, Budapest, Hungary
| | - Gabor Varga
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
| | - Miklos Zrinyi
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
| | - Krisztina S. Nagy
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
| | - Angela Jedlovszky-Hajdu
- Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
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Gyarmati B, Mammadova A, Barczikai D, Stankovits G, Misra A, Alavijeh MS, Varga Z, László K, Szilágyi A. Side group ratio as a novel means to tune the hydrolytic degradation of thiolated and disulfide cross-linked polyaspartamides. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2021.109577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Yavvari PS, Verma P, Mustfa SA, Pal S, Kumar S, Awasthi AK, Ahuja V, Srikanth CV, Srivastava A, Bajaj A. A nanogel based oral gene delivery system targeting SUMOylation machinery to combat gut inflammation. NANOSCALE 2019; 11:4970-4986. [PMID: 30839018 DOI: 10.1039/c8nr09599j] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Poor success rates and challenges associated with the current therapeutic strategies of inflammatory bowel disease (IBD) have accelerated the emergence of gene therapy as an alternative treatment option with great promise. However, oral delivery of nucleic acids (NAs) to an inflamed colon is challenged by multiple barriers presented by the gastrointestinal, extracellular and intracellular compartments. Therefore, we screened a series of polyaspartic acid-derived amphiphilic cationic polymers with varied hydrophobicity for their ability to deliver NAs into mammalian cells. Using the most effective TAC6 polymer, we then engineered biocompatible and stable nanogels composed of polyplexes (TAC6, NA) and an anionic polymer, sodium polyaspartate, that were able to deliver the NAs across mammalian cells using caveolae-mediated cellular uptake. We then utilized these nanogels for oral delivery of PIAS1 (protein inhibitor of activated STAT1), a SUMO 3 ligase, encoding plasmid DNA since PIAS1 is a key nodal therapeutic target for IBD due to its ability to control NF-κB-mediated inflammatory signaling. We show that plasmid delivery using TAC6-derived nanogels diminished gut inflammation in a murine colitis model. Therefore, our study presents engineering of orally deliverable nanogels that can target SUMOylation machinery to combat gut inflammation with very high efficacy.
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Affiliation(s)
- Prabhu Srinivas Yavvari
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal By-pass Road, Bhauri, Bhopal-462030, India.
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Yavvari PS, Awasthi AK, Sharma A, Bajaj A, Srivastava A. Emerging biomedical applications of polyaspartic acid-derived biodegradable polyelectrolytes and polyelectrolyte complexes. J Mater Chem B 2019; 7:2102-2122. [DOI: 10.1039/c8tb02962h] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A summary of positive biomedical attributes of biodegradable polyelectrolytes (PELs) prepared from aspartic acid is provided. The utility of these PELs in emerging applications such as biomineralization modulators, antimycobacterials, biocompatible cell encapsulants and tissue adhesives is highlighted.
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Affiliation(s)
- Prabhu Srinivas Yavvari
- Department of Chemistry
- Indian Institute of Science Education and Research
- Bhauri
- Bhopal-462066
- India
| | - Anand Kumar Awasthi
- Department of Chemistry
- Indian Institute of Science Education and Research
- Bhauri
- Bhopal-462066
- India
| | - Aashish Sharma
- Department of Chemistry
- Indian Institute of Science Education and Research
- Bhauri
- Bhopal-462066
- India
| | - Avinash Bajaj
- Laboratory of Nanotechnology and Chemical Biology
- Regional Centre for Biotechnology
- NCR Biotech Science Cluster
- Faridabad-121001
- India
| | - Aasheesh Srivastava
- Department of Chemistry
- Indian Institute of Science Education and Research
- Bhauri
- Bhopal-462066
- India
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Bissoyi A, Kumar Singh A, Kumar Pattanayak S, Bit A, Kumar Sinha S, Patel A, Jain V, Kumar Patra P. Understanding the molecular mechanism of improved proliferation and osteogenic potential of human mesenchymal stem cells grown on a polyelectrolyte complex derived from non-mulberry silk fibroin and chitosan. Biomed Mater 2017; 13:015011. [DOI: 10.1088/1748-605x/aa890c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Mat Yusuf SNA, Ng YM, Ayub AD, Ngalim SH, Lim V. Characterisation and Evaluation of Trimesic Acid Derivatives as Disulphide Cross-Linked Polymers for Potential Colon Targeted Drug Delivery. Polymers (Basel) 2017; 9:E311. [PMID: 30970988 PMCID: PMC6418558 DOI: 10.3390/polym9080311] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 07/14/2017] [Accepted: 07/20/2017] [Indexed: 11/16/2022] Open
Abstract
Discovery and use of biocompatible polymers offers great promise in the pharmaceutical field, particularly in drug delivery systems. Disulphide bonds, which commonly occur in peptides and proteins and have been used as drug-glutathione conjugates, are reductively cleaved in the colon. The intrinsic stability of a disulphide relative to thiol groups is determined by the redox potential of the environment. The objective of this study was to synthesise a trimesic acid-based disulphide cross-linked polymer that could potentially be used for targeted delivery to the colon. The monomer was synthesised by an amide coupling reaction between trimesic acid and (triphenylmethyl) thioethylamine using a two-step synthesis method. The s-trityl group was removed using a cocktail of trifluoroacetic acid and triethylsilane to expose the thiols in preparation for further polymerisation. The resulting polymers (P10, P15, P21, P25, and P51, generated using different molar ratios) were reduced after 1.5 h of reduction time. Scanning electron microscopy images of the polymers showed spherical, loose, or tight patterns depending on the molar ratio of polymerisation. These polymers also exhibited efficient dissolution under various gastrointestinal conditions. Of the five polymers tested, P10 and P15 appeared to be promising drug delivery vehicles for poorly soluble drugs, due to the hydrophobic nature of the polymers.
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Affiliation(s)
- Siti Nur Aishah Mat Yusuf
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Penang, Malaysia.
- Faculty of Engineering Technology, Universiti Malaysia Perlis, UniCITI Alam Campus, 02100 Padang Besar, Perlis, Malaysia.
| | - Yoke Mooi Ng
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Penang, Malaysia.
| | - Asila Dinie Ayub
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Penang, Malaysia.
| | - Siti Hawa Ngalim
- Regenerative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Penang, Malaysia.
| | - Vuanghao Lim
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Penang, Malaysia.
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9
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Fatima MT, Chanchal A, Yavvari PS, Bhagat SD, Gujrati M, Mishra RK, Srivastava A. Cell Permeating Nano-Complexes of Amphiphilic Polyelectrolytes Enhance Solubility, Stability, and Anti-Cancer Efficacy of Curcumin. Biomacromolecules 2016; 17:2375-83. [PMID: 27192144 DOI: 10.1021/acs.biomac.6b00417] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Many hydrophobic drugs encounter severe bioavailability issues owing to their low aqueous solubility and limited cellular uptake. We have designed a series of amphiphilic polyaspartamide polyelectrolytes (PEs) that solubilize such hydrophobic drugs in aqueous medium and enhance their cellular uptake. These PEs were synthesized through controlled (∼20 mol %) derivatization of polysuccinimide (PSI) precursor polymer with hydrophobic amines (of varying alkyl chain lengths, viz. hexyl, octyl, dodecyl, and oleyl), while the remaining succinimide residues of PSI were opened using a protonable and hydrophilic amine, 2-(2-amino-ethyl amino) ethanol (AE). Curcumin (Cur) was employed as a representative hydrophobic drug to explore the drug-delivery potential of the resulting PEs. Unprecedented enhancement in the aqueous solubility of Cur was achieved by employing these PEs through a rather simple protocol. In the case of PEs containing oleyl/dodecyl residues, up to >65000× increment in the solubility of Cur in aqueous medium could be achieved without requiring any organic solvent at all. The resulting suspensions were physically and chemically stable for at least 2 weeks. Stable nanosized polyelectrolyte complexes (PECs) with average hydrodynamic diameters (DH) of 150-170 nm (without Cur) and 220-270 nm (after Cur loading) were obtained by using submolar sodium polyaspartate (SPA) counter polyelectrolyte. The zeta potential of these PECs ranged from +36 to +43 mV. The PEC-formation significantly improved the cytocompatibility of the PEs while affording reconstitutable nanoformulations having up to 40 wt % drug-loading. The Cur-loaded PECs were readily internalized by mammalian cells (HEK-293T, MDA-MB-231, and U2OS), majorly through clathrin-mediated endocytosis (CME). Cellular uptake of Cur was directly correlated with the length of the alkyl chain present in the PECs. Further, the PECs significantly improved nuclear transport of Cur in cancer cells, resulting in their death by apoptosis. Noncancerous cells were completely unaffected under this treatment.
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Affiliation(s)
- Munazza T Fatima
- Department of Chemistry and §Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
| | - Abhishek Chanchal
- Department of Chemistry and §Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
| | - Prabhu S Yavvari
- Department of Chemistry and §Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
| | - Somnath D Bhagat
- Department of Chemistry and §Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
| | - Mansi Gujrati
- Department of Chemistry and §Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
| | - Ram K Mishra
- Department of Chemistry and §Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
| | - Aasheesh Srivastava
- Department of Chemistry and §Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
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10
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Singh M, Bajaj A. Unraveling the impact of hydroxylation on interactions of bile acid cationic lipids with model membranes by in-depth calorimetry studies. Phys Chem Chem Phys 2015; 16:19266-74. [PMID: 25098317 DOI: 10.1039/c4cp02283a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We used eight bile acid cationic lipids differing in the number of hydroxyl groups and performed in-depth differential scanning calorimetry studies on model membranes doped with different percentages of these cationic bile acids. These studies revealed that the number and positioning of free hydroxyl groups on bile acids modulate the phase transition and co-operativity of membranes. Lithocholic acid based cationic lipids having no free hydroxyl groups gel well with dipalmitoylphosphatidylcholine (DPPC) membranes. Chenodeoxycholic acid lipids having one free hydroxyl group at the 7'-carbon position disrupt the membranes and lower their co-operativity. Deoxycholic acid and cholic acid based cationic lipids have free hydroxyl groups at the 12'-carbon position, and at 7'- and 12'-carbon positions respectively. Doping of these lipids at high concentrations increases the co-operativity of membranes suggesting that these lipids might induce self-assembly in DPPC membranes. These different modes of interactions between cationic lipids and model membranes would help in future for exploring their use in DNA/drug delivery.
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Affiliation(s)
- Manish Singh
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 UdyogVihar, Phase I, Gurgaon-122016, Haryana, India.
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11
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Sharma A, Pohane AA, Bansal S, Bajaj A, Jain V, Srivastava A. Cell penetrating synthetic antimicrobial peptides (SAMPs) exhibiting potent and selective killing of mycobacterium by targeting its DNA. Chemistry 2015; 21:3540-5. [PMID: 25608020 DOI: 10.1002/chem.201404650] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 12/09/2014] [Indexed: 01/08/2023]
Abstract
Naturally occurring antimicrobial peptides (AMPs) are powerful defence tools to tackle pathogenic microbes. However, limited natural production and high synthetic costs in addition to poor selectivity limit large-scale use of AMPs in clinical settings. Here, we present a series of synthetic AMPs (SAMPs) that exhibit highly selective and potent killing of Mycobacterium (minimum inhibitory concentration <20 μg mL(-1)) over E. coli or mammalian cells. These SAMPs are active against rapidly multiplying as well as growth saturated Mycobacterium cultures. These SAMPs are not membrane-lytic in nature, and are readily internalized by Mycobacterium and mammalian cells; whereas in E. coli, the lipopolysaccharide layer inhibits their cellular uptake, and hence, their antibacterial action. Upon internalization, these SAMPs interact with the unprotected genomic DNA of mycobacteria, and impede DNA-dependent processes, leading to bacterial cell death.
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Affiliation(s)
- Aashish Sharma
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore Bypass Road, Bhauri, Bhopal, 462066 (India)
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12
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Singh M, Bansal S, Kundu S, Bhargava P, Singh A, Motiani RK, Shyam R, Sreekanth V, Sengupta S, Bajaj A. Synthesis, Structure-Activity Relationship, and Mechanistic Investigation of Lithocholic Acid Amphiphiles for Colon Cancer Therapy. MEDCHEMCOMM 2015; 6:192-201. [PMID: 25685308 PMCID: PMC4322782 DOI: 10.1039/c4md00223g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report a structure-activity relationship of lithocholic acid amphiphiles for their anticancer activities against colon cancer. We synthesized ten cationic amphiphiles differing in nature of cationic charged head groups using lithocholic acid. We observed that anticancer activities of these amphiphiles against colon cancer cell lines are contingent on nature of charged head group. Lithocholic acid based amphiphile possessing piperidine head group (LCA-PIP1 ) is ~10 times more cytotoxic as compared to its precursor. Biochemical studies revealed that enhanced activity of LCA-PIP1 as compared to lithocholic acid is due to greater activation of apoptosis.LCA-PIP1 induces sub G0 arrest and causes cleavage of caspases. A single dose of lithocholic acid-piperidine derivative is enough to reduce the tumor burden by 75% in tumor xenograft model.
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Affiliation(s)
- Manish Singh
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, Haryana, India
| | - Sandhya Bansal
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, Haryana, India
| | - Somanath Kundu
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, Haryana, India
- Manipal University, Manipal, Karnatka, India.
| | - Priyanshu Bhargava
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, Haryana, India
| | - Ashima Singh
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, Haryana, India
| | - Rajender K. Motiani
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, Haryana, India
| | - Radhey Shyam
- National Institute of Immunology, Aruna Asif Ali Marg, New Delhi 110067, India
| | - Vedagopuram Sreekanth
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, Haryana, India
- Manipal University, Manipal, Karnatka, India.
| | - Sagar Sengupta
- National Institute of Immunology, Aruna Asif Ali Marg, New Delhi 110067, India
| | - Avinash Bajaj
- The Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, Haryana, India
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13
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Nath SD, Abueva C, Kim B, Lee BT. Chitosan–hyaluronic acid polyelectrolyte complex scaffold crosslinked with genipin for immobilization and controlled release of BMP-2. Carbohydr Polym 2015; 115:160-9. [DOI: 10.1016/j.carbpol.2014.08.077] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 08/14/2014] [Accepted: 08/17/2014] [Indexed: 01/25/2023]
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14
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Singh M, Kundu S, Reddy M A, Sreekanth V, Motiani RK, Sengupta S, Srivastava A, Bajaj A. Injectable small molecule hydrogel as a potential nanocarrier for localized and sustained in vivo delivery of doxorubicin. NANOSCALE 2014; 6:12849-55. [PMID: 25227567 DOI: 10.1039/c4nr04064c] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The majority of the localized drug delivery systems are based on polymeric or polypeptide scaffolds, as weak intermolecular interactions of low molecular weight hydrogelators (LMHGs, Mw <500 Da) are significantly perturbed in the presence of anticancer drugs. Here, we present l-alanine derived low molecular weight hydrogelators (LMHGs) that remain injectable even after entrapping the anticancer drug doxorubicin (DOX). These DOX containing nanoassemblies (DOX-Gel) showed promising anticancer activity in mice models. Subcutaneous injection of DOX-Gel near the tumor achieved a greater decrease in tumour load than by intravenous injection of DOX (DOX-IV), and local injection of DOX alone (DOX-Local) at the tumor site. We noticed that DOX-Gel nanocarriers are especially effective when injected during the early stage of tumor progression, and achieve a substantial decrease in tumor load in the long term.
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Affiliation(s)
- Manish Singh
- Laboratory of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, 180 Udyog Vihar, Phase 1, Gurgaon-122016, India.
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Sharma A, Srivastava A. Pronounced influence of pH, metal-ion and solvent isotope on the thermoresponse of synthetic amphiphilic polypeptides. Polym Chem 2013. [DOI: 10.1039/c3py00741c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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