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Chauhan P, Srivastava A, Bhati P, Chaturvedi M, Patil V, Kunnoth S, Kumari N, Arya V, Pandya M, Agarwal M, Bhardwaj S, Faraz F, Chauhan S, Verma M, Koul V, Bhatnagar N. Enhanced osseointegration of drug eluting nanotubular dental implants: An in vitro and in vivo study. Bioact Mater 2023; 28:432-447. [PMID: 37426894 PMCID: PMC10329101 DOI: 10.1016/j.bioactmat.2023.06.003] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 05/16/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023] Open
Abstract
Faster and predictable osseointegration is crucial for the success of dental implants, especially in patients with compromised local or systemic conditions. Despite various surface modifications on the commercially available Titanium (Ti) dental implants, the bioactivity of Ti is still low. Thus, to achieve both biological and therapeutic activity on titanium surfaces, surface modification techniques such as titanium nanotubes have been studied as nanotube surfaces can hold therapeutic drugs and molecules. The main aim of the present research work is to study the early osseointegration around the novel Simvastatin drug eluting nanotubular dental implant. In the present research, the titanium nanotubes were fabricated on the screw-shaped dental implant surface and the Simvastatin drug was loaded into the nanotubes using the ultrasonication dip method. In vitro and In vivo studies were carried out on the modified dental implants. In vitro cell culture study reported enhanced osteogenic activity on the drug-loaded nanotube surface implants. The invivo animal studies were evaluated by micro-CT, histopathology, and reverse torque removal analysis methods. The test results showed faster osseointegration with the strong interface on the Simvastatin drug-loaded implant surface at 4 weeks of healing as compared to the control implants.
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Affiliation(s)
- Pankaj Chauhan
- Homi Bhabha Cancer Hospital and Research Centre, Vizag, Andhra Pradesh, India
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, India
| | - Alok Srivastava
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
| | - Pooja Bhati
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
- Mechanical & Automation Engineering, Indira Gandhi Delhi Technical University for Women, New Delhi, India
| | - Manish Chaturvedi
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
- Rajasthan Technical University, Kota Rajasthan, India
| | - Vinay Patil
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
| | - Sriram Kunnoth
- Applied Mechanics, Indian Institute of Technology Delhi, India
| | - Nisha Kumari
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
| | - Vedpal Arya
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
- National University of Singapore, Singapore
| | - Madhur Pandya
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
| | - Mohit Agarwal
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
| | - Smiti Bhardwaj
- Department of Periodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India
| | - Farrukh Faraz
- Department of Periodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India
| | - Sanjay Chauhan
- Rajasthan Dental College and Hospital, Jaipur, Rajasthan, India
| | - Mahesh Verma
- Department of Prosthodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, India
| | - Naresh Bhatnagar
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, India
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Mathur A, Kharbanda OP, Koul V, Dinda AK, Anwar MF, Singh S. Fabrication and evaluation of antimicrobial biomimetic nanofibre coating for improved dental implant bio-seal: An in vitro study. J Periodontol 2021; 93:1578-1588. [PMID: 34855256 DOI: 10.1002/jper.21-0255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 04/23/2021] [Revised: 07/26/2021] [Accepted: 09/26/2021] [Indexed: 11/08/2022]
Abstract
BACKGROUND A weak implant-soft tissue interface may lead to bacterial ingression, breakdown of underlying tissues, and eventually implant failure. This study proposes a surface modification technique of titanium alloy (Ti), using a nano-biopolymer scaffold to enhance soft tissue attachment in dental implants. METHODS Gelatin (20% w/v) embedded with 10±2 nm silver nanoparticles (AgNPs) was electrospun to form a Gelatin Electrospun Mat (GEM) scaffold, bonded to Ti alloy surface using chemical surface functionalization. Antimicrobial activity of AgNPs was tested against representative Gram-positive (S. aureus) and Gram-negative bacteria (E. coli) at 4, 24, and 48 hours (h) and after embedding in scaffold at 48 h. Cytotoxicity analysis (MTT assay) was carried out using the 3T3 mouse fibroblast cell line at 24 and 72 h for two groups: Control (unmodified Ti disc) and Experimental (GEM embedded with AgNPs); and further validated by scanning electron microscopy (SEM). RESULTS The AgNPs-embedded GEM showed good antimicrobial activity at 48 h, with the AgNPs showing complete (99.99%) inhibition of bacterial colony counts at 24 h and 48 h. Cell viability and proliferation over the GEM modified Ti discs were seen to be significantly increased (p < 0.05) at 72 h as compared to control. SEM images revealed intimate spreading of fibroblasts, with differentiated cell morphology and pseudopodial processes, indicative of enhanced fibroblastic adhesion, growth, and differentiation over the scaffold. CONCLUSION Results show good antifouling properties and biocompatibility of the fabricated coating, making it a promising strategy to reduce post-operative infections and peri-implant diseases in Ti dental implants. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Apoorva Mathur
- Centre for Dental Education and Research (CDER, ), All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Om Prakash Kharbanda
- Dr. CG Pandit, National Chair of ICMR, Room 206, Department of Plastic Surgery, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Veena Koul
- PhD Professor Emeritus, Centre for Biomedical Engineering, IIT Delhi, India
| | - Amit Kumar Dinda
- ICMR Emeritus Scientist, Department of Pathology, All India Institute of Medical Sciences, New Delhi, 110029, India
| | | | - Suchita Singh
- Scientist C (Clinical Operations), Div. of ECD, ITRC, Indian Council for Medical Research, New Delhi, India
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Thanusha AV, Koul V. Biocompatibility evaluation for the developed hydrogel wound dressing - ISO-10993-11 standards - in vitroand in vivostudy. Biomed Phys Eng Express 2021; 8. [PMID: 34794128 DOI: 10.1088/2057-1976/ac3b2b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 05/07/2021] [Accepted: 11/18/2021] [Indexed: 11/11/2022]
Abstract
Assessment of biocompatibility for the developed wound dressing plays a significant role in translational studies. In the present research work, a wound dressing has been developed using gelatin, hyaluronic acid and chondroitin sulfate using EDC as crosslinker in a specific manner. The characterized hydrogel wound dressing was evaluated for its biocompatibility studies by means of ISO-10993-11 medical device rules and standards. Various parameters like skin sensitization test, acute systemic toxic test, implantation study, intracutaneous reactivity test,in vitrocytotoxicity test and bacterial reverse mutation test, were evaluated and the results demonstrated its safety for the pre-clinical investigation.
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Affiliation(s)
- A V Thanusha
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, India.,Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, India.,Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi, India
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Chauhan P, Koul V, Bhatnagar N. Critical Role of Etching Parameters in the Evolution of Nano Micro SLA Surface on the Ti6Al4V Alloy Dental Implants. Materials (Basel) 2021; 14:ma14216344. [PMID: 34771869 PMCID: PMC8585160 DOI: 10.3390/ma14216344] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 08/30/2021] [Revised: 10/05/2021] [Accepted: 10/09/2021] [Indexed: 01/12/2023]
Abstract
The surface of dental implants plays a vital role in early and more predictable osseointegration. SLA (sandblasted large grit and acid-etched) represents the most widely accepted, long-term clinically proven surface. Primarily, dental implants are manufactured by either commercially pure titanium (CP-Ti) or Ti6Al4V ELI alloy. The acid etch behavior of CP-Ti is well known and its effects on the surface microstructure and physicochemical properties have been studied by various researchers in the past. However, there is a lack of studies showing the effect of acid etching parameters on the Ti6Al4V alloy surface. The requirement of the narrow diameter implants necessitates implant manufacturing from alloys due to their high mechanical properties. Hence, it is necessary to have an insight on the behavior of acid etching of the alloy surface as it might be different due to changed compositions and microstructure, which can further influence the osseointegration process. The present research was carried out to study the effect of acid etching parameters on Ti6Al4V ELI alloy surface properties and the optimization of process parameters to produce micro- and nanotopography on the dental implant surface. This study shows that the Ti6Al4V ELI alloy depicts an entirely different surface topography compared to CP-Ti. Moreover, the surface topography of the Ti6Al4V ELI alloy was also different when etching was done at room temperature compared to high temperature, which in turn affected the behavior of the cell on these surfaces. Both microns and nano-level topography were achieved through the optimized parameters of acid etching on Ti6Al4V ELI alloy dental implant surface along with improved roughness, hydrophilicity, and enhanced cytocompatibility.
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Affiliation(s)
- Pankaj Chauhan
- Mechanical Engineering Department, Indian Institute of Technology, Delhi 110016, India;
- Centre for Biomedical Engineering, Indian Institute of Technology, Delhi 110016, India;
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology, Delhi 110016, India;
| | - Naresh Bhatnagar
- Mechanical Engineering Department, Indian Institute of Technology, Delhi 110016, India;
- Correspondence:
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Khurana A, Banothu AK, Thanusha AV, Nayal A, Dinda AK, Singhal M, Bharani KK, Koul V. Preclinical efficacy study of a porous biopolymeric scaffold based on gelatin-hyaluronic acid-chondroitin sulfate in a porcine burn injury model: role of critical molecular markers (VEGFA, N-cadherin, COX-2), gamma sterilization efficacy and a comparison of healing potential to Integra™. Biomed Mater 2021; 16. [PMID: 34384056 DOI: 10.1088/1748-605x/ac1d3e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 04/16/2021] [Accepted: 08/12/2021] [Indexed: 12/24/2022]
Abstract
Development of scaffold from biopolymers can ease the requirements for donor skin autograft and plays an effective role in the treatment of burn wounds. In the current study, a porous foam based, bilayered hydrogel scaffold was developed using gelatin, hyaluronic acid and chondroitin sulfate (G-HA-CS). The fabricated scaffold was characterized physicochemically for pre- and post-sterilization efficacy by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA).In-vitrostudies proved that the scaffold promoted cellular proliferation. The efficacy of G-HA-CS scaffold was compared with Integra™ at different time points (7, 14, 21 and 42 days), in a swine second degree burn wound model. Remarkable healing potential of the scaffold was evident from the wound contraction rate, reduction of IL-6, TNF-αand C3. The expression of healing markers TGF-β1 and collagen 1 revealed significant skin regeneration with regulated fibroblast activation towards the late phase of healing (p< 0.001 at day 21 and 42 vs. control). Expression of Vascular Endothelial Growth Factor A (VEGFA), vimentin and N-cadherin were found to favor angiogenesis and skin regeneration. Mechanistically, scaffold promoted wound healing by modulation of CD-45, cyclooxygenase-2 and MMP-2. Thus, the promising results with foam based scaffold, comparable to Integra™ in swine burn injury model offer an innovative lead for clinical translation for effective management of burn wound.
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Affiliation(s)
- Amit Khurana
- Centre for Biomedical Engineering (CBME), Indian Institute of Technology (IIT) Delhi, Hauz Khas, New Delhi 110016, India.,Department of Veterinary Pharmacology and Toxicology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad 500030, Telangana, India.,Department of Veterinary Pharmacology and Toxicology, College of Veterinary Science (CVSc), PVNRTVU, Warangal 506166, Telangana, India
| | - Anil Kumar Banothu
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad 500030, Telangana, India.,Department of Aquatic Animal Health Management, College of Fishery Science, PVNRTVU, Pebbair, Wanaparthy 509104, Telangana, India
| | - A V Thanusha
- Centre for Biomedical Engineering (CBME), Indian Institute of Technology (IIT) Delhi, Hauz Khas, New Delhi 110016, India
| | - Aradhana Nayal
- Centre for Biomedical Engineering (CBME), Indian Institute of Technology (IIT) Delhi, Hauz Khas, New Delhi 110016, India
| | - Amit Kumar Dinda
- Department of Pathology, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi 110029, India
| | - Maneesh Singhal
- Department of Plastic, Reconstructive and Burns Surgery, J.P.N. Apex Trauma Centre, All India Institute of Medical Sciences (AIIMS), Raj Nagar, New Delhi 110029, India
| | - Kala Kumar Bharani
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad 500030, Telangana, India.,Department of Veterinary Pharmacology and Toxicology, College of Veterinary Science (CVSc), PVNRTVU, Warangal 506166, Telangana, India.,Department of Aquatic Animal Health Management, College of Fishery Science, PVNRTVU, Pebbair, Wanaparthy 509104, Telangana, India
| | - Veena Koul
- Centre for Biomedical Engineering (CBME), Indian Institute of Technology (IIT) Delhi, Hauz Khas, New Delhi 110016, India
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Banerjee A, Koul V, Bhattacharyya J. Fabrication of In Situ Layered Hydrogel Scaffold for the Co-delivery of PGDF-BB/Chlorhexidine to Regulate Proinflammatory Cytokines, Growth Factors, and MMP-9 in a Diabetic Skin Defect Albino Rat Model. Biomacromolecules 2021; 22:1885-1900. [PMID: 33899465 DOI: 10.1021/acs.biomac.0c01709] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Diabetes mellitus (DM)-associated impairments in wound healing include prolonged inflammation, the overexpression of matrix metalloproteases (MMPs), and low levels of growth factors at the wound site. To this end, a layer-by-layer scaffold (SL-B-L) made of cross-linked silk fibroin and hyaluronic acid is developed to deliver chlorhexidine, an antimicrobial agent and an MMP-9 inhibitor, along with the PDGF-BB protein. SL-B-L exhibited highly porous morphology. Diabetic rats treated with SL-B-L demonstrated an early wound closure, a fully reconstructed epithelial layer by 14 days, and reduced levels of IL-6, TNF-α, TGF-β1, and MMP-9. Interestingly, SL-B-L treatment increased angiogenesis, the bioavailability of collagen, DNA content, and VEGF-A levels. Furthermore, enhanced keratinocyte-fibroblast interaction along with ordered collagen deposition was observed in SL-B-L-treated rats. Most interestingly, when compared with a clinically used scaffold SEESKIN+, SL-B-L outperformed in promoting wound healing in a diabetic rat model by regulating the inflammation while delivering growth factor and the MMP-9 inhibitor.
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Affiliation(s)
- Ahana Banerjee
- Centre for Biomedical Engineering, Indian Institute of Technology, Delhi, New Delhi 110016, India.,Department of Biomedical Engineering, All India Institute of Medical Science, Delhi, New Delhi 110016, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology, Delhi, New Delhi 110016, India.,Department of Biomedical Engineering, All India Institute of Medical Science, Delhi, New Delhi 110016, India
| | - Jayanta Bhattacharyya
- Centre for Biomedical Engineering, Indian Institute of Technology, Delhi, New Delhi 110016, India.,Department of Biomedical Engineering, All India Institute of Medical Science, Delhi, New Delhi 110016, India
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A V T, Mohanty S, Dinda AK, Koul V. Fabrication and evaluation of gelatin/hyaluronic acid/chondroitin sulfate/asiatic acid based biopolymeric scaffold for the treatment of second-degree burn wounds - Wistar rat model study. ACTA ACUST UNITED AC 2020; 15:055016. [PMID: 32252033 DOI: 10.1088/1748-605x/ab8721] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An extracellular matrix (ECM) mimicking architecture was introduced with gelatin glycosaminoglycans like hyaluronic acid and chondroitin sulfate and a triterpenoid using asiatic acid, possessing biodegradable and biocompatible properties that mark the functionality for the treatment of second-degree burn wounds. In the present work, a foam-based scaffold was fabricated and sterilized with gamma radiation at a 2.5 Mrad dose. The scaffolds were further characterized for morphology, swelling, degradation behaviour, release of bioactive components, ATR-FTIR, mechanical, thermal properties and compared with control. In vitro cytocompatibility of the developed scaffold was studied with L929 mouse fibroblast cells and human mesenchymal stem cells based on deoxyribonucleic acid and lactate dehydrogenase assay. Additionally, the developed scaffold was evaluated for its biocompatibility on the Wistar rat to assess any toxicity induced to the animal based on blood biochemistry and histopathology analysis. Finally, we assessed the efficacy of developed foam scaffolds on the second-degree burn wound-induced Wistar rat with a scaffold alone and a scaffold seeded with human bone-marrow-derived mesenchymal stem cells in a wound healing study for 28 d. The wound contraction assay, histopathology, immunohistochemistry analysis and pro-healing marker quantification using hexosamine, hydroxyproline, and pro-inflammatory markers like TNF-α and MMP-2 were carried out and compared with the commercially available wound dressing. The results revealed that foam-based ECM mimic was cytocompatible, biocompatible and biodegradable in 18 ± 3 d in in vivo conditions and the scaffold fostered the process of healing of second-degree burns within 28 d of treatment. The obtained result proved that the scaffold has a potential for clinical settings in second-degree burn wound treatment.
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Affiliation(s)
- Thanusha A V
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India. Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi, India
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Singh G, Nayal A, Malhotra S, Koul V. Dual functionalized chitosan based composite hydrogel for haemostatic efficacy and adhesive property. Carbohydr Polym 2020; 247:116757. [PMID: 32829870 DOI: 10.1016/j.carbpol.2020.116757] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [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: 12/07/2019] [Revised: 05/28/2020] [Accepted: 07/10/2020] [Indexed: 10/23/2022]
Abstract
The objective of this study was to devise a dual functionalized chitosan based hydrogel dressing to control haemorrhage/ bleeding. The haemostatic hydrogel was formulated by amalgamation of a definite ratio of quaternized chitosan and phosphorylated chitosan along with tannic acid which acted as adjuvant hemostat and a crosslinker. Additionally, the hydrogel contained poly-Ɛ-lysine to impart the elastic and adhesive properties. The optimized hydrogel exhibited superior haemostatic activity (clotting time, 225 ± 5 s), platelet activation (soluble P-selectin concentration 2098 ± 150.19 ng mL-1), adhesion strength (almost 3 times higher in comparison to Axiostat), higher fluid absorption (approx. 14 times in 12 h) in addition to better mechanical properties, faster coagulation attributes (Prothrombin time, 12.6 s and activated partial thromboplastin time, 30.1 s) and lower proinflammatory potential (almost 3 times lower Tumor Necrosis Factor- α levels and 45 times lower InterLeukin-6 levels at 48 h against control) over marketed chitosan based dressing (clotting time, 300 ± 25 s). Cytotoxicity studies using L929 fibroblasts cells and in-vivo studies using Wistar rats confirmed that the optimized hydrogel was non-toxic, cytocompatible and biocompatible.
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Affiliation(s)
- Gopendra Singh
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Aradhana Nayal
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110016, India
| | - Sahil Malhotra
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi, 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India.
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Abstract
A diabetic microenvironment primes neutrophils for NETosis, a process of formation of neutrophil extracellular traps (NETs) that further degrades the neutrophils and makes them unavailable for the early-stage inflammatory processes. Mechanistically, simple modification of arginine residues of histones to citrulline by peptidylarginine deiminase (PAD4) enzyme is considered to be a prerequisite for NETosis. In fact, under diabetic conditions, an increase in PAD4-mediated NET formation is considered as one of the reasons for impaired wound healing. Therefore, in the present work, an alginate-GelMa (generally recognized as safe category by FDA, USA) based hydrogel scaffold containing a tripeptide (Thr-Asp-F-amidine) that inhibits PAD4 is developed, based on the hypothesis that inhibiting PAD4 enzyme might offer a way to enhance wound healing under diabetic conditions. The scaffolds are thoroughly characterized for their physicochemical and biological properties. Furthermore, neutrophil-scaffold interactions in terms of NETosis ability and release of other related biomarkers are studied. The wound healing ability is evaluated by a cell migration assay. In vivo wound healing efficacy of the developed scaffolds is demonstrated using a diabetic rat model. The results suggest a reduction in NETosis in the presence of a PAD4 inhibitor. Thus, the study demonstrates a novel scaffold system to deliver the PAD4 inhibitor that can be used to modulate NETosis and improve wound healing.
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Affiliation(s)
- Tejinder Kaur
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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Koul V. Mean platelet volume in patients with acute coronary syndrome and its correlation with angiographic severity – an observational study. Indian Heart J 2019. [DOI: 10.1016/j.ihj.2019.11.011] [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: 10/25/2022] Open
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Naz F, Kumar Dinda A, Kumar A, Koul V. Investigation of ultrafine gold nanoparticles (AuNPs) based nanoformulation as single conjugates target delivery for improved methotrexate chemotherapy in breast cancer. Int J Pharm 2019; 569:118561. [DOI: 10.1016/j.ijpharm.2019.118561] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 07/20/2019] [Accepted: 07/23/2019] [Indexed: 11/27/2022]
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Manjunatha RG, Prasad R, Sharma S, Narayan R, Koul V. Iontophoretic delivery of lidocaine hydrochloride through ex-vivo human skin. J DERMATOL TREAT 2019; 31:191-199. [DOI: 10.1080/09546634.2019.1589640] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Roopa G. Manjunatha
- Energy Institute, Bangalore, India
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, New-Delhi, India
| | - Rachna Prasad
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, New-Delhi, India
| | - Sunil Sharma
- Department of Burns and Plastic Surgery, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India
| | - R.P. Narayan
- Department of Burns and Plastic Surgery, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, New-Delhi, India
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Madan S, Nehate C, Barman TK, Rathore AS, Koul V. Design, preparation, and evaluation of liposomal gel formulations for treatment of acne: in vitro and in vivo studies. Drug Dev Ind Pharm 2018; 45:395-404. [PMID: 30442066 DOI: 10.1080/03639045.2018.1546310] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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: 10/27/2022]
Abstract
The study highlights the significance of co-application of bioactive components into liposomal gel formulations and their comparison to azithromycin for treatment of Acne. A Design of Experiments (DoE) approach was utilized to obtain optimized liposomal formulation encapsulating curcumin, with size and zeta potential of ∼100 nm and ∼14 mV, respectively, characterized by DLS, HR-TEM, FESEM, and AFM. The curcumin liposomal dispersion depicted excellent stability over the period of 60 days, which was further converted in gel form using Carbopol. Pharmacokinetics of curcumin-loaded liposomal gel showed that Tmax for curcumin was achieved within 1 h of post application in both stratum corneum and skin, indicating quick penetration of nano-sized liposomes. Stratum corneum depicted Cmax of 688.3 ng/mL and AUC0-t of 5857.5 h × ng/mL, while the skin samples displayed Cmax of 203.3 ng/gm and AUC0-t of 2938.1 h × ng/gm. Lauric acid and azithromycin liposomal gel formulations were prepared as per the optimum parameters obtained by DoE. In antibacterial activity using agar diffusion assay, lauric acid gel formulation revealed ∼1.5 fold improved antibacterial effect than curcumin gel formulation. Interestingly, their co-application (1:1) exhibited significantly enhanced antibacterial effect against both macrolide-sensitive (1.81 versus 1.25 folds) and resistant strains of P. acnes (2.93 versus 1.22 folds) than their individual counterparts. The in vivo studies in rat ear model displayed a ∼2 fold reduction in comedones count and cytokines (TNF-α and IL-1β) on co-application with curcumin and lauric acid liposomal gel compared to placebo treated group.
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Affiliation(s)
- Sumit Madan
- a Centre for Biomedical Engineering , Indian Institute of Technology , New Delhi , India
| | - Chetan Nehate
- a Centre for Biomedical Engineering , Indian Institute of Technology , New Delhi , India
| | - Tarani Kanta Barman
- a Centre for Biomedical Engineering , Indian Institute of Technology , New Delhi , India
| | - Anurag S Rathore
- b Department of Chemical Engineering , Indian Institute of Technology , New Delhi , India
| | - Veena Koul
- a Centre for Biomedical Engineering , Indian Institute of Technology , New Delhi , India
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Abstract
In the present investigation, the potential of a novel, self-assembled, biocompatible, and redox-sensitive copolymer system with disulfide bond was explored for doxorubicin (DOX) delivery through polymersome nanostructures of ∼120 nm. The polymer system was synthesized with less steps, providing a high yield of 86%. The developed polymersomes showed admirable biocompatibility with high dose tolerability in vitro and in vivo. The colloidal stability of DOX-loaded polymersomes depicted a stable and uniform particle size over a period of 72 h. The cellular internalization of polymersomes was assessed in HeLa and MDA-MB-231 cell lines, where enhanced cellular internalization was observed. The dose-dependent cytotoxicity was observed for DOX-loaded polymersomes by MTT cytotoxicity assay in the above cell lines. The tumor suppression studies were assessed in Ehrlich ascites tumor (EAT) carrying Swiss albino mice, where polymersomes exhibited a 7.16-fold reduction in tumor volume correlated with control and 5.39-fold higher tumor inhibition capacity compared to conventional chemotherapy (free DOX treatment). The developed polymersomes gave safer insights concerning DOX associated toxicities by histopathology and serum biochemistry analysis. Thus, results focus on the potential of redox responsive polymersomes for efficacious and improved DOX therapy with enhanced antitumor activity and insignificant cardiotoxicity which can be translated to clinical settings.
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Affiliation(s)
- Chetan Nehate
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India.,Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Aradhana Nayal
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India.,Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India.,Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
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Goyal K, Konar A, Kumar BSH, Koul V. Lactoferrin-conjugated pH and redox-sensitive polymersomes based on PEG-S-S-PLA-PCL-OH boost delivery of bacosides to the brain. Nanoscale 2018; 10:17781-17798. [PMID: 30215650 DOI: 10.1039/c8nr03828g] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present study, engineered lactoferrin (Lf)-conjugated pH and redox-sensitive polymersomes derived from the triblock copolymer polyethylene glycol-S-S-polylactic acid-polycaprolactone (PEG-S-S-PLA-PCL-OH) have been used to deliver bacosides to the brain. Bacosides are classified as triterpenoid saponins and are used in Indian Ayurveda for reversal of amnesia; however, no study has extensively demonstrated their efficacy as a nano-formulation in an animal model. The polymer was synthesized by ring opening polymerization of lactide and ε-caprolactone. The nanoparticles obtained by nanoprecipitation showed a core-shell morphology, with an average size of 110 nm, by transmission electron microscopy (TEM). The colloidal stability, hemocompatibility and cytocompatibility of the polymersomes proved their biocompatibility. pH and disulfide linkages in the polymeric chain accelerated the disintegration of the polymersomes at pH 6.6 and at pH 6.6 with glutathione (GSH) in comparison to pH 7.4, supporting their degradation behavior. Supermagnetic iron oxide nanoparticles (SPIONs, 74.99 μg mg-1 polymer) encapsulated into the polymersomes demonstrated their uptake in a mouse model by MRI. Furthermore, bacosides encapsulated in the polymersomes (10% loading) showed significant memory loss reversal in chemically induced amnesic mice, supported by the gene expression profiles of Arc, BDNF and CREB as well as by histopathology.
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Affiliation(s)
- Kritika Goyal
- Center for Biomedical Engineering, Indian Institute of Technology Delhi, India.
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16
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A.V. T, Dinda AK, Koul V. Evaluation of nano hydrogel composite based on gelatin/HA/CS suffused with Asiatic acid/ZnO and CuO nanoparticles for second degree burns. Materials Science and Engineering: C 2018; 89:378-386. [DOI: 10.1016/j.msec.2018.03.034] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 03/16/2018] [Accepted: 03/30/2018] [Indexed: 11/26/2022]
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17
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Manjunatha RG, Sharma S, Narayan RP, Koul V. Effective permeation of 2.5 and 5% lidocaine hydrochloride in human skin using iontophoresis technique. Int J Dermatol 2018; 57:1335-1343. [PMID: 29978889 DOI: 10.1111/ijd.14107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/06/2018] [Accepted: 06/07/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND Lidocaine Hydrochloride (HCL) is one of the commonest topical local anesthetic drugs. The permeation of the lidocaine can be enhanced by iontophoresis (IOP). The purpose of this study was to evaluate the permeability of 2.5 and 5% lidocaine permeation in ex vivo human skin using different IOP waveform. METHODS Continuous and modulated IOP at the current density of 0.5 mA/cm2 were applied across human skin (n = 3) in donor chamber of vertical diffusion cell at 2.5 and 5% lidocaine concentration. High Performance Liquid Chromatography was used to determine lidocaine concentration. RESULTS Findings revealed that lidocaine concentration increased effectively in a time-dependent manner in both modulated and continuous IOP at 2.5 and 5% lidocaine concentration. Compared to the passive group, the flux of lidocaine with modulated and continuous IOP were higher of about six and ten-fold, respectively. However, no significant difference was observed between continuous and modulated IOP groups at both lidocaine concentrations. At 2.5% lidocaine concentration, the permeation time taken by modulated and continuous IOP to attain therapeutic levels of 142 and 164 μg/cm2 , respectively, was approximately 10 minutes. At 5% lidocaine, the therapeutic permeation of 129 and 147 μg/cm2 , respectively, was achieved at approximately 5 minutes after applying iontophoresis waveform. CONCLUSION Study shows that modulated IOP can be a promising alternative method in clinical settings aside from continuous IOP. Based on the clinical requirements, IOP can be used at 2.5 and 5% lidocaine concentration depending on need of relatively short or very short onset action.
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Affiliation(s)
- Roopa G Manjunatha
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New-Delhi, India
| | - Sunil Sharma
- Department of Burns and Plastic Surgery, Vardhman Mahavir Medical College & Safdarjung Hospital, New-Delhi, India
| | - Ravi Prakash Narayan
- Department of Burns and Plastic Surgery, Vardhman Mahavir Medical College & Safdarjung Hospital, New-Delhi, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New-Delhi, India
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Nehate C, Moothedathu Raynold AA, Haridas V, Koul V. Comparative Assessment of Active Targeted Redox Sensitive Polymersomes Based on pPEGMA-S-S-PLA Diblock Copolymer with Marketed Nanoformulation. Biomacromolecules 2018; 19:2549-2566. [DOI: 10.1021/acs.biomac.8b00178] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Chetan Nehate
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
- Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Aji Alex Moothedathu Raynold
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
- Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - V. Haridas
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
- Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
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Bhowmick S, Thanusha AV, Kumar A, Scharnweber D, Rother S, Koul V. Nanofibrous artificial skin substitute composed of mPEG–PCL grafted gelatin/hyaluronan/chondroitin sulfate/sericin for 2nd degree burn care: in vitro and in vivo study. RSC Adv 2018; 8:16420-16432. [PMID: 35540513 PMCID: PMC9080273 DOI: 10.1039/c8ra01489b] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [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: 02/17/2018] [Accepted: 04/22/2018] [Indexed: 12/26/2022] Open
Abstract
The aim of this study was to investigate the efficacy of a skin substitute composed of mPEG–PCL–grafted-gelatin (Bio-Syn)/hyaluronan/chondroitin sulfate/sericin and to study its in vitro biocompatibility with human fibroblasts, human keratinocytes and hMSCs in terms of cellular adhesion and proliferation (∼5–6 fold). mPEG–PCL was grafted into a gelatin backbone via a Michael addition reaction to prepare Bio-Syn and it was characterized using ATR-FTIR, 1H NMR and TNBS assay. Additionally, keratinocyte–hMSC contact co-culture studies showed that Bio-Syn composite scaffolds loaded with sericin promote hMSCs’ epithelial differentiation with regard to qRT-PCR gene expression (ΔNp63α and keratin 14) and expression of various epithelial markers (Pan-cytokeratin, ΔNp63α and keratin 14). In vivo efficacy studies on a 2nd degree burn wound model in Wistar rats showed an improved rate of wound contraction, histology (H&E and Van Gieson’s staining) and pro-healing marker (hexosamine, hydroxyproline, etc.) expression in granular tissue compared to using the commercial dressing Neuskin™ and a cotton gauze control. The paper demonstrates the fabrication of sericin loaded hybrid polymeric composite nanofibrous scaffold and evaluation of its cytocompatibilty in three human monocultures and biocompatibility in second degree burn wound model in Wistar rats.![]()
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Affiliation(s)
- Sirsendu Bhowmick
- Max-Bergmann Center of Biomaterials Dresden
- Technische Universität Dresden
- Dresden
- Germany
- Centre for Biomedical Engineering
| | - A. V. Thanusha
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
| | - Arun Kumar
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
| | - Dieter Scharnweber
- Max-Bergmann Center of Biomaterials Dresden
- Technische Universität Dresden
- Dresden
- Germany
| | - Sandra Rother
- Max-Bergmann Center of Biomaterials Dresden
- Technische Universität Dresden
- Dresden
- Germany
| | - Veena Koul
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
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20
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Nehate C, Moothedathu Raynold AA, Koul V. ATRP Fabricated and Short Chain Polyethylenimine Grafted Redox Sensitive Polymeric Nanoparticles for Codelivery of Anticancer Drug and siRNA in Cancer Therapy. ACS Appl Mater Interfaces 2017; 9:39672-39687. [PMID: 29048878 DOI: 10.1021/acsami.7b11716] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
To overcome the limitations of conventional chemotherapy, nanoparticle-mediated combinatorial delivery of siRNA and drugs represents a new approach to overcome its associated side effects. Designing safe and efficient vehicles for their codelivery has emerged as a potential challenge in the clinical translation of these formulations. Herein, we have demonstrated a novel "two-in-one" polyplex nanosystem developed from redox sensitive, short chain polyethylenimine modified poly[(poly(ethylene)glycol methacrylate]-s-s-polycaprolactone copolymer synthesized by atom-transfer free-radical polymerization (ATRP), which can deliver doxorubicin and polo-like kinase I (plk1) siRNA, simultaneously for an enhanced chemotherapeutic effect. The nanoparticles were found to be stable at physiological buffer with and without fetal bovine serum (FBS). The developed polymeric nanosystem was found to be biocompatible and hemocompatible in vitro and in vivo at repeated dose administrations. The polymer could easily self-assemble into ∼100 nm spherical nanoparticles with enhanced doxorubicin loading (∼18%) and effective siRNA complexation at a polymer to siRNA weight ratio of 15. The doxorubicin loaded nanoparticles exhibited ∼4-fold higher drug release in endosomal pH (pH 5) containing 10 mmol of GSH compared to pH 7.4, depicting their redox-sensitive behavior. The polyplexes were capable of delivering both cargos simultaneously to cancer cells in vitro as observed by their excellent colocalization in the cytoplasm of MDA-MB-231 and HeLa cells using confocal laser microscopy. Moreover, in vitro transfection of the cells with polyplexes exhibited 50-70% knockdown of plk1-mRNA expression in both cell lines. In vivo administration of the drug loaded polyplexes to EAT tumor bearing (EAT, Ehrlich ascites tumor) Swiss albino mice showed a ∼29-fold decrease in percent tumor volume in comparison to the control group. The results highlight the therapeutic potential of the polyplexes as a combined delivery of doxorubicin and plk1-siRNA in cancer therapy.
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Affiliation(s)
- Chetan Nehate
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi , New Delhi 110016, India
- Biomedical Engineering Unit, All India Institute of Medical Sciences , New Delhi 110029, India
| | - Aji Alex Moothedathu Raynold
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi , New Delhi 110016, India
- Biomedical Engineering Unit, All India Institute of Medical Sciences , New Delhi 110029, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi , New Delhi 110016, India
- Biomedical Engineering Unit, All India Institute of Medical Sciences , New Delhi 110029, India
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21
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Deshpande S, Sharma S, Koul V, Singh N. Core-Shell Nanoparticles as an Efficient, Sustained, and Triggered Drug-Delivery System. ACS Omega 2017; 2:6455-6463. [PMID: 30023520 PMCID: PMC6044672 DOI: 10.1021/acsomega.7b01016] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 09/25/2017] [Indexed: 05/05/2023]
Abstract
One of the challenges in designing a successful drug-delivery vehicle is the control over drug release. Toward this, a number of multifunctional nanoparticles with multiple triggers and complex chemistries have been developed. To achieve an efficient and maximum therapeutic effect, a trigger dependent drug-delivery system with sustained release is desirable. In this paper, we report the use of a combination of thermoresponsive gold core and polymeric shell nanoparticles that can provide a sustained, triggered release of doxorubicin, making the system more efficient compared to individual nanoparticles. The selection of the system was dependent on the best trigger applicable in biological systems and a component responsive to that trigger. Because of the best tissue penetration depth observed for radiofrequency (rf), we chose rf as a trigger. Whereas the gold nanoparticles (AuNPs) provided hyperthermia trigger on exposure to rf fields, the thermoresponsiveness was endowed by poly(N-isopropylacrylamide) (pNIPAm)-based polymer shells. AuNPs with three different compositions of shells, only pNIPAm and p(NIPAm-co-NIPMAm) with the ratio of NIPAm/N-(isopropylmethacrylamide) (NIPMAm) 1:1 (pNIPMAm50) and 1:3 (pNIPMAm75), were synthesized. We observed that the polymer coating on the AuNPs did not affect the heating efficiency of AuNPs by rf and exhibited a temperature-dependent release of the chemotherapeutic drug, doxorubicin. The nanoparticles were biocompatible, stable in biologically relevant media, and were able to show a burst as well as a sustained release, which was rf-dependent. Interestingly, we observed that when HeLa cells were treated with doxorubicin-loaded gold core-polymeric shell NPs and exposed to rf for varying times, the mixture of the two polymeric shell nanoparticles induced more cell death as compared to the cells treated with single nanoparticles, suggesting that such multi-nanoparticle systems can be more efficacious delivery systems instead of a single multicomponent system.
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Affiliation(s)
- Sonal Deshpande
- Centre
for Biomedical Engineering, Indian Institute
of Technology-Delhi, Hauz Khas, New Delhi 110016, India
| | - Sapna Sharma
- Centre
for Biomedical Engineering, Indian Institute
of Technology-Delhi, Hauz Khas, New Delhi 110016, India
| | - Veena Koul
- Centre
for Biomedical Engineering, Indian Institute
of Technology-Delhi, Hauz Khas, New Delhi 110016, India
- Biomedical
Engineering Unit, All India Institute of
Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - Neetu Singh
- Centre
for Biomedical Engineering, Indian Institute
of Technology-Delhi, Hauz Khas, New Delhi 110016, India
- Biomedical
Engineering Unit, All India Institute of
Medical Sciences, Ansari Nagar, New Delhi 110029, India
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22
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Sharan J, Koul V, Dinda AK, Kharbanda OP, Lale SV, Duggal R, Mishra M, Gupta G, Singh MP. Bio-functionalization of grade V titanium alloy with type I human collagen for enhancing and promoting human periodontal fibroblast cell adhesion - an in-vitro study. Colloids Surf B Biointerfaces 2017; 161:1-9. [PMID: 29035745 DOI: 10.1016/j.colsurfb.2017.10.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [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: 04/19/2017] [Revised: 10/05/2017] [Accepted: 10/06/2017] [Indexed: 11/26/2022]
Abstract
Surface modification of medical grade V titanium alloy (Ti-6Al-4V) with biomolecules is an important and vital step for tailoring it for various biomedical applications. Present study investigates theinfluence of type I human collagen (T1HC) bio-conjugation through a three stage process. Polished grade V titanium alloy discs were functionalizedwith free OH group by means of controlled heat and alkali treatment followed by coating of 3-aminopropyltriethoxy (APTES) silane couplingagent. T1HC were bio-conjugated through 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide hydrochloride N-hydroxysuccinimide (EDCNHS)coupling reaction. At each stage, grade V titanium alloy surfaces were characterized by atomic force microscopy (AFM), scanning electronmicroscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Xrayphotoelectron spectroscopy (XPS). FTIR and XPS studies confirms thecovalent attachment of APTES with titanium alloy surface while terminalamine groups of APTES remained free for further attachment of T1HCthrough covalent bond. Aqueous stability of bio-conjugated titanium discsat various pH and time intervals (i.e. at pH of 5.5, 6.8 and 8.0 at timeinterval of 27 and 48h) confirmed the stability of T1HC bioconjugated collagen on titanium surface. Further human periodontalfibroblast cell line (HPdlF) culture revealed enhanced adhesion on theT1HC bio-conjugated surface compared to the polystyrene and polishedgrade V titanium alloy surfaces.
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Affiliation(s)
- Jitendra Sharan
- Divison of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India; Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Amit K Dinda
- Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Om P Kharbanda
- Divison of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Shantanu V Lale
- Department of Chemical Engineering, Texas Tech University, Lubbock, TX 79409, USA
| | - Ritu Duggal
- Divison of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Monu Mishra
- Physics of Energy Harvesting, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Govind Gupta
- Physics of Energy Harvesting, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - Manoj P Singh
- Advanced Instrumentation Research Facility, Jawaharlal Nehru University, New Delhi 110067, India
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Bhowmick S, Rother S, Zimmermann H, Lee PS, Moeller S, Schnabelrauch M, Koul V, Scharnweber D. Reciprocal influence of hMSCs/HaCaT cultivated on electrospun scaffolds. J Mater Sci Mater Med 2017; 28:128. [PMID: 28721664 DOI: 10.1007/s10856-017-5941-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 06/27/2017] [Indexed: 06/07/2023]
Abstract
Here, we investigated the synergistic effect of electrospun nanofibrous scaffolds made of gelatin /sulfated hyaluronan (sHA) or native hyaluronan (HA)/chondroitin sulfate (CS) and, keratinocytes (HaCaT)-human mesenchymal stem cells (hMSCs) contact co-culture on epithelial differentiation of hMSCs. The hMSCs were co-cultured in contact with HaCaT cells for 5 days on electrospun scaffold. Results show that electrospun scaffolds containing sulfated glycosaminoglycans (GAGs) stimulate epithelial differentiation in terms of various protein expression markers (keratin 14, ΔNp63α and Pan-cytokeratin) and gene expression of several dermal proteins (keratin 14, ΔNp63α). Electrospun scaffold independent of GAGs alone did not affect the epithelial differentiation of hMSCs but combination of keratinocyte-hMSC contact co-culture and electrospun scaffold promotes the epithelial differentiation of hMSCs.
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Affiliation(s)
- Sirsendu Bhowmick
- Department of Chemistry, University at Albany, State University of New York, Albany, NY, 12222, USA.
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany.
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
| | - Sandra Rother
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Heike Zimmermann
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Poh S Lee
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Stephanie Moeller
- Biomaterials Department, INNOVENT e.V., Prüssingstraße 27B, 07745, Jena, Germany
| | | | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Dieter Scharnweber
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany.
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Aji Alex M, Nehate C, Veeranarayanan S, Kumar DS, Kulshreshtha R, Koul V. Self assembled dual responsive micelles stabilized with protein for co-delivery of drug and siRNA in cancer therapy. Biomaterials 2017; 133:94-106. [DOI: 10.1016/j.biomaterials.2017.04.022] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 04/11/2017] [Accepted: 04/12/2017] [Indexed: 12/11/2022]
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Sharan J, Singh S, Lale SV, Mishra M, Koul V, Kharbanda P. Applications of Nanomaterials in Dental Science: A Review. J Nanosci Nanotechnol 2017; 17:2235-2255. [PMID: 29638105 DOI: 10.1166/jnn.2017.13885] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanotechnology has revolutionized health care industry in a large scale and its applications are a boon to modern medicine and dental science. It is expected to pervade and further revolutionize the art and science of dentistry and may well have important applications spanning all the aspects of oral diseases, diagnosis, prevention and treatment. Materials science in dentistry has embraced the technology to produce nanomaterials that are being used in caries inhibitors, antimicrobial resins, hard tissue remineralizing agents, targeted drug delivery, scaffolds, bio-membranes, nanocrystalline hydroxyl apatite, restorative cements, adhesion promoters and boosters, bioactive glass, tissue conditioners, reinforced methacrylate resins, root canal disinfectants, friction free orthodontic arch wires and nano composites life. These upcoming technologies have potential to bring about significant benefits in the form of improvement in dental science and to society. The present review presents the latest recent developments in this interdisciplinary field bridging nanotechnology and dental science.
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Nehate C, Aji Alex MR, Kumar A, Koul V. Combinatorial delivery of superparamagnetic iron oxide nanoparticles (γFe 2O 3) and doxorubicin using folate conjugated redox sensitive multiblock polymeric nanocarriers for enhancing the chemotherapeutic efficacy in cancer cells. Mater Sci Eng C Mater Biol Appl 2017; 75:1128-1143. [PMID: 28415398 DOI: 10.1016/j.msec.2017.03.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 01/02/2017] [Accepted: 03/02/2017] [Indexed: 11/28/2022]
Abstract
Redox sensitive, folate conjugated multiblock polymeric system of (-PLGA-PEG-PLGA-urethane-ss-) demonstrated self-assembly into stable nanoplatforms. The polymeric nanocarriers were encapsulated with doxorubicin and highly crystalline γFe2O3 superparamagnetic iron oxide nanoparticles (SPIONs), for co-delivery of the same to cancer cells, with average particle size of ~170nm and zeta potential of ~-33mV. Furthermore, the designed formulation was evaluated for protein adsorption, hemo-cytocompatibility and stability. Glutathione (GSH) induced redox sensitivity of the nanocarriers was depicted by ~4.47 fold increase in drug release in the presence of 10mM GSH. In vitro cellular uptake studies of the designed nanocarriers showed synergistic cytotoxic effect in folate overexpressing cells (HeLa and MDA-MB-231), after subjecting the cells to radio frequency (RF) induced hyperthermia (~43°C). Negligible effect of the combinatorial therapy was observed in normal cells (L929). The developed polymeric system depicted facile synthesis, reproducibility and potential for achieving combinatorial and targeted delivery of drug and SPIONs to cancer cells. This combinatorial approach can help in achieving better therapeutic effect with minimal side effects of chemotherapy.
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Affiliation(s)
- Chetan Nehate
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - M R Aji Alex
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Arun Kumar
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India; Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India.
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Aji Alex MR, Veeranarayanan S, Poulose AC, Nehate C, Kumar DS, Koul V. Click modified amphiphilic graft copolymeric micelles of poly(styrene-alt-maleic anhydride) for combinatorial delivery of doxorubicin and plk-1 siRNA in cancer therapy. J Mater Chem B 2016; 4:7303-7313. [PMID: 32263732 DOI: 10.1039/c6tb02094a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The anti-apoptotic defense mechanism of cancer cells poses a major hurdle which makes chemotherapy less effective. Combinatorial delivery of drugs and siRNAs targeting anti-apoptotic proteins is a vital means for improving therapeutic effects. The present study aims at designing a suitable carrier which can effectively co-deliver doxorubicin and plk1 siRNA to tumor cells. Low molecular weight poly(styrene-alt-maleic anhydride) was chemically modified via a click reaction to obtain a cationic amphiphilic polymer for the co-delivery of therapeutic agents. Short glycol chains were utilized as linker molecules for grafting which in turn imparted a stealth nature and minimized plasma protein adsorption to the polymeric surface. Isonicotinic acid was grafted to the polymer due to its ability to penetrate the endolysosomal membrane and arginine-lysine conjugates were embedded for complexing siRNA. The polymer was able to self-assemble in to smooth, spherical micellar structures with a CMC of ∼3 μg mL-1. The particle size of the micelles was ∼14-30 nm as depicted using TEM and FESEM. Atomic force microscopic analysis showed an average height of ∼12 nm for the polymeric micelles. An optimum doxorubicin loading of ∼9% w/w was achieved with the micelles using a dialysis method. Effective complexation of siRNA occurred above a polymer/siRNA weight ratio of 10 without any significant change in the particle size. Doxorubicin and fluorescent labeled siRNA loaded micelles exhibited excellent co-localization within the cytoplasm of MCF-7 cells. The synergistic effect of the active agents in inhibiting tumor cell proliferation was depicted using an MTT assay and visualized using calcein/propidium iodide staining of the treated cells. Co-administration of doxorubicin and plk1 siRNA in EAT tumor bearing Swiss albino mice using the cationic micelles significantly enhanced the antitumor efficacy.
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Affiliation(s)
- M R Aji Alex
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India.
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Bhowmick S, Mohanty S, Koul V. Fabrication of transparent quaternized PVA/silver nanocomposite hydrogel and its evaluation as an antimicrobial patch for wound care systems. J Mater Sci Mater Med 2016; 27:160. [PMID: 27638099 DOI: 10.1007/s10856-016-5772-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 08/29/2016] [Indexed: 06/06/2023]
Abstract
Grafting of quaternary nitrogen atoms into the backbone of polymer is an efficient way of developing new generation antimicrobial polymeric wound dressing. In this study, an elastic, non-adhesive and antimicrobial transparent hydrogel based dressing has been designed, which might be helpful for routine observation of wound area without removing the dressing material along with maintaining a sterile environment for a longer period of time. Green synthesized silver nanoparticles have been loaded into the quaternized PVA hydrogel matrix to improve its antimicrobial property. Silver nanoparticles loaded quaternized PVA hydrogel showed enhanced mechanical and swelling properties compared to native quaternized PVA hydrogel. Release kinetics evaluated by atomic absorption spectroscopy revealed that the release mechanism of silver nanoparticles from the hydrogel follows Fickian diffusion. Antimicrobial efficacy of the hydrogels was evaluated by disk diffusion test on Pseudomonas aeruginosa, Staphylococcus aureus and Escherichia coli. After 96 h of release in phosphate buffer, the growth inhibition zone created by silver nanoparticless loaded quaternized PVA hydrogel is comparable to that created by ampicillin. These observations assert that the silver nanoparticles loaded quaternized PVA hydrogel acts as a reservoir of silver nanoparticles, which helps in maintaining a sterile environment for longer time duration by releasing Ag nanocrystallite in sustained manner.
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Affiliation(s)
- Sirsendu Bhowmick
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, Dresden, 01069, Germany
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
- Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Sujata Mohanty
- Stem Cell Facility, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
- Biomedical Engineering Unit, All India Institute of Medical Sciences, New Delhi, 110029, India.
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Mathur D, Goyal K, Koul V, Anand A. The Molecular Links of Re-Emerging Therapy: A Review of Evidence of Brahmi (Bacopa monniera). Front Pharmacol 2016; 7:44. [PMID: 26973531 PMCID: PMC4778428 DOI: 10.3389/fphar.2016.00044] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 02/16/2016] [Indexed: 12/17/2022] Open
Abstract
The convolution associated with memory is being resolved with advancement in neuroscience. According to the concurrent assumptions, synaptic plasticity forms one of the basis of memory formation, stabilization and strengthening. In Alzheimer's disease (AD), which is generally characterized by memory dysfunction, connections amongst the cells in the brain are attenuated or lost leading to degeneration of neural networks. Numerous attempts have been made to find new therapies for memory dysfunction with increasing attention and investments being laid on herbal drugs. Many herbal plants and extracts have already documented beneficial results when tested for antiamnesic effects. Brahmi (Bacopa monniera) is one such common herbal drug, which is employed for a long time in the Indian and Chinese medical system in order to treat several disorders. Previous research has shown that Brahmi exerts many pharmacological effects including memory boosting capacity in the treatment of Alzheimer's disease and Schizophrenia, exhibiting antiparkinsonian, antistroke, and anticonvulsant potentials. The present review discusses the chemical constituents of Brahmi along with in vitro and in vivo studies based on the pharmacological effects exerted by it. The efficacy of Brahmi in treating various disorders has evoked sufficient research in recent years and now it is a time to launch multiple clinical trials.
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Affiliation(s)
- Deepali Mathur
- Department of Functional Biology, Faculty of Biological Sciences, University of Valencia Valencia, Spain
| | - Kritika Goyal
- Neuroscience Research Lab, Department of Neurology, Post Graduate Institute of Medical Education and Research Chandigarh, India
| | - Veena Koul
- Center for Biomedical Engineering, Indian Institute of Technology New Delhi, India
| | - Akshay Anand
- Neuroscience Research Lab, Department of Neurology, Post Graduate Institute of Medical Education and Research Chandigarh, India
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Naz F, Koul V, Srivastava A, Gupta YK, Dinda AK. Biokinetics of ultrafine gold nanoparticles (AuNPs) relating to redistribution and urinary excretion: a long-term in vivo study. J Drug Target 2016; 24:720-9. [PMID: 26837799 DOI: 10.3109/1061186x.2016.1144758] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Gold nanoparticles (AuNPs) of ultrafine size have drawn attention for their use in drug delivery systems. Tissue toxicity may be an issue when AuNPs are used for such applications. We investigated the long-term biokinetics (90 d), redistribution, and urinary excretion of three different-sized (2 ± 0.5 nm, 5 ± 1 nm, and 10 ± 2 nm) AuNPs after a single intravenous (i.v.) administration of 1250 µg/kg dose in mice. ICP-AES analysis of lungs, liver, spleen, heart, kidney, brain, blood, and urine revealed highest accumulation of gold in spleen around 15 d after injection. A low concentration was detected in brain after 1 d without any residual AuNPs after 30 d. Ultrastructural study of brain tissue also showed few AuNPs in lysosome with no changes in cellular architecture. Renal retention of AuNPs was limited indicating low nephrotoxic potential. AuNPs were detectable in urine till 30 d after single injection indicating slow excretion from the body. No evidence of significant toxicity was observed in hemogram, serum biochemistry, and tissue histology. No mortality, changes in behavior, hair color, weight, and food intake was observed as compared to control mice. Therefore, we conclude that the ultrafine AuNPs are predominantly excreted in urine without any systemic toxicity following i.v. administration and are hence safe for use in drug delivery systems.
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Affiliation(s)
- Farhat Naz
- a Department of Pathology , All India Institute of Medical Sciences (AIIMS) , New Delhi , India
| | - Veena Koul
- b Centre for Biomedical Engineering, Indian Institute of Technology , New Delhi , India
| | - Amita Srivastava
- a Department of Pathology , All India Institute of Medical Sciences (AIIMS) , New Delhi , India
| | - Yogendra Kumar Gupta
- a Department of Pathology , All India Institute of Medical Sciences (AIIMS) , New Delhi , India
| | - Amit Kumar Dinda
- a Department of Pathology , All India Institute of Medical Sciences (AIIMS) , New Delhi , India
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Bhowmick S, Scharnweber D, Koul V. Co-cultivation of keratinocyte-human mesenchymal stem cell (hMSC) on sericin loaded electrospun nanofibrous composite scaffold (cationic gelatin/hyaluronan/chondroitin sulfate) stimulates epithelial differentiation in hMSCs: In vitro study. Biomaterials 2016; 88:83-96. [PMID: 26946262 DOI: 10.1016/j.biomaterials.2016.02.034] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [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: 12/16/2015] [Revised: 02/22/2016] [Accepted: 02/22/2016] [Indexed: 12/21/2022]
Abstract
Fortifying the scaffold with bioactive molecules and glycosaminoglycans (GAGs), is an efficient way to design new generation tissue engineered biomaterials. In this study, we evaluated the synergistic effect of electrospun nanofibrous composite scaffold (cationic gelatin/hyaluronan/chondroitin sulfate) loaded with sericin and, contact co-culture of human mesenchymal stem cells (hMSCs)-keratinocytes on hMSCs' differentiation towards epithelial lineage. Cationic gelatin is prepared with one step novel synthesis process by grafting quaternary ammonium salts to the backbone of gelatin. Release kinetics studies showed that Fickian diffusion is the major release mechanism for both GAGs and sericin/gelatin. In vitro biocompatibility of the electrospun scaffold was evaluated in terms of LDH and DNA quantification assay on human foreskin fibroblast, human keratinocyte and hMSC. Significant proliferation (∼ 4-6 fold) was detected after culturing all three cell on the electrospun scaffold containing sericin. After 5 days of contact co-culture, results revealed that electrospun scaffold containing sericin promote epithelial differentiation of hMSC in terms of several protein markers (keratin 14, ΔNp63α and Pan-cytokeratin) and gene expression of some dermal proteins (keratin 14, ΔNp63α). Findings of this study will foster the progress of current skin tissue engineering scaffolds by understanding the skin regeneration and wound healing process.
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Affiliation(s)
- Sirsendu Bhowmick
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069 Dresden, Germany; Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Dieter Scharnweber
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069 Dresden, Germany
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India.
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Jaiswal M, Koul V, Dinda AK. In vitroandin vivoinvestigational studies of a nanocomposite-hydrogel-based dressing with a silver-coated chitosan wafer for full-thickness skin wounds. J Appl Polym Sci 2016. [DOI: 10.1002/app.43472] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Maneesh Jaiswal
- Centre for Biomedical Engineering; Indian Institute of Technology; New Delhi India 110016
| | - Veena Koul
- Centre for Biomedical Engineering; Indian Institute of Technology; New Delhi India 110016
| | - Amit Kr. Dinda
- Department of Pathology; All India Institute of Medical Sciences; New Delhi India 110029
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33
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Bhowmick S, Koul V. Assessment of PVA/silver nanocomposite hydrogel patch as antimicrobial dressing scaffold: Synthesis, characterization and biological evaluation. Materials Science and Engineering: C 2016; 59:109-119. [DOI: 10.1016/j.msec.2015.10.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 09/14/2015] [Accepted: 10/01/2015] [Indexed: 12/25/2022]
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Exley SE, Paslay LC, Sahukhal GS, Abel BA, Brown TD, McCormick CL, Heinhorst S, Koul V, Choudhary V, Elasri MO, Morgan SE. Antimicrobial Peptide Mimicking Primary Amine and Guanidine Containing Methacrylamide Copolymers Prepared by Raft Polymerization. Biomacromolecules 2015; 16:3845-52. [PMID: 26558609 DOI: 10.1021/acs.biomac.5b01162] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Naturally occurring antimicrobial peptides (AMPs) display the ability to eliminate a wide variety of bacteria, without toxicity to the host eukaryotic cells. Synthetic polymers containing moieties mimicking lysine and arginine components found in AMPs have been reported to show effectiveness against specific bacteria, with the mechanism of activity purported to depend on the nature of the amino acid mimic. In an attempt to incorporate the antimicrobial activity of both amino acids into a single water-soluble copolymer, a series of copolymers containing lysine mimicking aminopropyl methacrylamide (APMA) and arginine mimicking guanadinopropyl methacrylamide (GPMA) were prepared via aqueous RAFT polymerization. Copolymers were prepared with varying ratios of the comonomers, with degree of polymerization of 35-40 and narrow molecular weight distribution to simulate naturally occurring AMPs. Antimicrobial activity was determined against Gram-negative and Gram-positive bacteria under conditions with varying salt concentration. Toxicity to mammalian cells was assessed by hemolysis of red blood cells and MTT assays of MCF-7 cells. Antimicrobial activity was observed for APMA homopolymer and copolymers with low concentrations of GPMA against all bacteria tested, with low toxicity toward mammalian cells.
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Affiliation(s)
- Sarah E Exley
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Lea C Paslay
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Gyan S Sahukhal
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Brooks A Abel
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Tyler D Brown
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Charles L McCormick
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Sabine Heinhorst
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Veena Koul
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Veena Choudhary
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Mohamed O Elasri
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
| | - Sarah E Morgan
- School of Polymers and High Performance Materials, ‡Biological Sciences, and §Department of Chemistry and Biochemistry, The University of Southern Mississippi , Hattiesburg, Mississippi 39406, United States.,Center for Biomedical Engineering, and #Center for Polymer Science and Engineering, Indian Institute of Technology , Delhi, New Delhi 110016, India
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35
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Lale SV, Kumar A, Prasad S, Bharti AC, Koul V. Folic Acid and Trastuzumab Functionalized Redox Responsive Polymersomes for Intracellular Doxorubicin Delivery in Breast Cancer. Biomacromolecules 2015; 16:1736-52. [DOI: 10.1021/acs.biomac.5b00244] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shantanu V. Lale
- Centre
for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
- Biomedical
Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Arun Kumar
- Centre
for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
- Biomedical
Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Shyam Prasad
- Division
of Molecular Oncology, Institute of Cytology and Preventive Oncology, Noida 201301, India
| | - Alok C. Bharti
- Division
of Molecular Oncology, Institute of Cytology and Preventive Oncology, Noida 201301, India
| | - Veena Koul
- Centre
for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
- Biomedical
Engineering Unit, All India Institute of Medical Sciences, New Delhi 110029, India
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36
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Kumar A, Lale SV, Mahajan S, Choudhary V, Koul V. ROP and ATRP Fabricated Dual Targeted Redox Sensitive Polymersomes Based on pPEGMA-PCL-ss-PCL-pPEGMA Triblock Copolymers for Breast Cancer Therapeutics. ACS Appl Mater Interfaces 2015; 7:9211-9227. [PMID: 25838044 DOI: 10.1021/acsami.5b01731] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To minimize cardiotoxicity and to increase the bioavailability of doxorubicin, polymersomes based on redox sensitive amphiphilic triblock copolymer poly(polyethylene glycol methacrylate)-poly(caprolactone)-s-s-poly(caprolactone)-poly(polyethylene glycol methacrylate) (pPEGMA-PCL-ss-PCL-pPEGMA) with disulfide linkage were designed and developed. The polymers were synthesized by ring opening polymerization (ROP) of ε-caprolactone followed by atom transfer radical polymerization (ATRP) of PEGMA. The triblock copolymers demonstrated various types of nanoparticle morphologies by varying hydrophobic/hydrophilic content of polymer blocks, with PEGMA content of ∼18% in the triblock copolymer leading to the formation of polymersomes in the size range ∼150 nm. High doxorubicin loading content of ∼21% was achieved in the polymersomes. Disulfide linkages were incorporated in the polymeric backbone to facilitate degradation of the nanoparticles by the intracellular tripeptide glutathione (GSH), leading to intracellular drug release. Release studies showed ∼59% drug release in pH 5.5 in the presence of 10 mM GSH, whereas only ∼19% was released in pH 7.4. In cellular uptake studies, dual targeted polymersomes showed ∼22-fold increase in cellular uptake efficiency in breast cancer cell lines (BT474 and MCF-7) as compared to nontargeted polymersomes with higher apoptosis rates. In vivo studies on Ehrlich's ascites tumor (EAT) bearing Swiss albino mouse model showed ∼85% tumor regression as compared to free doxorubicin (∼42%) without any significant cardiotoxicity associated with doxorubicin. The results indicate enhanced antitumor efficacy of the redox sensitive biocompatible nanosystem and shows promise as a potential drug nanocarrier in cancer therapeutics.
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Affiliation(s)
- Arun Kumar
- §Biomedical Engineering Unit, All India Institute of Medical Sciences, AIIMS, New Delhi 110029, India
| | - Shantanu V Lale
- §Biomedical Engineering Unit, All India Institute of Medical Sciences, AIIMS, New Delhi 110029, India
| | - Shveta Mahajan
- §Biomedical Engineering Unit, All India Institute of Medical Sciences, AIIMS, New Delhi 110029, India
| | | | - Veena Koul
- §Biomedical Engineering Unit, All India Institute of Medical Sciences, AIIMS, New Delhi 110029, India
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Jaiswal M, Gupta A, Dinda AK, Koul V. An investigation study of gelatin release from semi-interpenetrating polymeric network hydrogel patch for excision wound healing on Wistar rat model. J Appl Polym Sci 2015. [DOI: 10.1002/app.42120] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Maneesh Jaiswal
- Centre for Biomedical Engineering; Indian Institute of Technology; New Delhi 110016 India
| | - Asheesh Gupta
- Pharmacology Division; Defence Institute of Physiology and Allied Sciences, Ministry of Defense; New Delhi 110059 India
| | - Amit Kumar Dinda
- Department of Pathology; All India Institute of Medical Sciences; New Delhi 110024 India
| | - Veena Koul
- Centre for Biomedical Engineering; Indian Institute of Technology; New Delhi 110016 India
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Lale SV, Kumar A, Naz F, Bharti AC, Koul V. Multifunctional ATRP based pH responsive polymeric nanoparticles for improved doxorubicin chemotherapy in breast cancer by proton sponge effect/endo-lysosomal escape. Polym Chem 2015. [DOI: 10.1039/c4py01698j] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Folic acid and trastuzumab functionalized pH responsive polymeric nanoparticles for intracellular doxorubicin delivery in breast cancer.
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Affiliation(s)
- Shantanu V. Lale
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
| | - Arun Kumar
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
| | - Farhat Naz
- Department of Pathology
- All India Institute of Medical Sciences
- New Delhi 110029
- India
| | - Alok C. Bharti
- Division of Molecular Oncology
- Institute of Cytology and Preventive Oncology
- Noida 201301
- India
| | - Veena Koul
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
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39
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Aji Alex MR, Nagpal N, Kulshreshtha R, Koul V. Synthesis and evaluation of cationically modified poly(styrene-alt-maleic anhydride) nanocarriers for intracellular gene delivery. RSC Adv 2015. [DOI: 10.1039/c5ra00409h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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] Open
Abstract
The paper discusses the intracellular gene delivery efficacy of various cationic PSMA derivatives.
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Affiliation(s)
- M. R. Aji Alex
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
| | - Neha Nagpal
- Department of Biochemical Engineering and Biotechnology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Ritu Kulshreshtha
- Department of Biochemical Engineering and Biotechnology
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Veena Koul
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
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40
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Kumar A, Lale SV, Naz F, Choudhary V, Koul V. Synthesis and biological evaluation of dual functionalized glutathione sensitive poly(ester-urethane) multiblock polymeric nanoparticles for cancer targeted drug delivery. Polym Chem 2015. [DOI: 10.1039/c5py00898k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Dual targeted redox responsive doxorubicin loaded polymeric nanoparticles were prepared and evaluated for anticancer efficacy.
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Affiliation(s)
- Arun Kumar
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
| | - Shantanu V. Lale
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
| | - Farhat Naz
- Department of Pathology
- All India Institute of Medical Sciences (AIIMS)
- New Delhi 110029
- India
| | - Veena Choudhary
- Centre for Polymer Science and Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Veena Koul
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Biomedical Engineering Unit
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Srivastava A, Koul V, Dwivedi SN, Upadhyaya AD, Ahuja A, Saxena R. Performance analysis of newly developed point-of-care hemoglobinometer (TrueHb) against an automated hematology analyzer (Sysmex XT 1800i) in terms of precision in hemoglobin measurement. Int J Lab Hematol 2014; 37:483-5. [PMID: 25418886 DOI: 10.1111/ijlh.12314] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 02/22/2014] [Accepted: 10/13/2014] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate the performance of the newly developed handheld hemoglobinmeter (TrueHb) by comparing its performance against and an automated five-part hematology analyzer, Sysmex counter XT 1800i (Sysmex). METHODS Two hundred venous blood samples were subjected through their total hemoglobin evaluation on each device three times. The average of the three readings on each device was considered as their respective device values, that is, TrueHb values and Sysmex values. The two set of values were comparatively analyzed. The repeatability of the performance of TrueHb was also evaluated against Sysmex values. RESULTS The scatter plot of TrueHb values and Sysmex values showed linear distribution with positive correlations (r = 0.99). The intraclass correlation (ICC) values between the two set of values was found to be 0.995. Regression coefficients through origin, β, was found to be 0.995, with 95% confidence intervals (CI) ranging between 0.9900 and 1.0000. The mean difference in Bland-Altman plots of TrueHb values against the Sysmex values was found to be -0.02, with limits of agreement between -0.777 and 0.732 g/dL. Statistical analysis suggested good repeatability in results of TrueHb, having a low mean CV of 2.22, against 4.44, that of Sysmex values, and 95% confidence interval of 1.99-2.44, against 3.85-5.03, that of Sysmex values. CONCLUSION These results suggested a strong positive correlation between the two measurements devices. It is thus concluded that TrueHb is a good point-of-care testing tool for estimating hemoglobin.
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Affiliation(s)
- A Srivastava
- Technology Business Incubation Unit, Indian Institute of Technology - Delhi, New Delhi, India
| | - V Koul
- Centre for Biomedical Engineering, Indian Institute of Technology - Delhi, New Delhi, India
| | - S N Dwivedi
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - A D Upadhyaya
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - A Ahuja
- Department of Hematology, All India Institute of Medical Sciences, New Delhi, India
| | - R Saxena
- Department of Hematology, All India Institute of Medical Sciences, New Delhi, India
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Lale SV, R G A, Aravind A, Kumar DS, Koul V. AS1411 aptamer and folic acid functionalized pH-responsive ATRP fabricated pPEGMA-PCL-pPEGMA polymeric nanoparticles for targeted drug delivery in cancer therapy. Biomacromolecules 2014; 15:1737-52. [PMID: 24689987 DOI: 10.1021/bm5001263] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nonspecificity and cardiotoxicity are the primary limitations of current doxorubicin chemotherapy. To minimize side effects and to enhance bioavailability of doxorubicin to cancer cells, a dual-targeted pH-sensitive biocompatible polymeric nanosystem was designed and developed. An ATRP-based biodegradable triblock copolymer, poly(poly(ethylene glycol) methacrylate)-poly(caprolactone)-poly(poly(ethylene glycol) methacrylate) (pPEGMA-PCL-pPEGMA), conjugated with doxorubicin via an acid-labile hydrazone bond was synthesized and characterized. Dual targeting was achieved by attaching folic acid and the AS1411 aptamer through EDC-NHS coupling. Nanoparticles of the functionalized triblock copolymer were prepared using the nanoprecipitation method, resulting in an average particle size of ∼140 nm. The biocompatibility of the nanoparticles was evaluated using MTT cytotoxicity assays, blood compatibility studies, and protein adsorption studies. In vitro drug release studies showed a higher cumulative doxorubicin release at pH 5.0 (∼70%) compared to pH 7.4 (∼25%) owing to the presence of the acid-sensitive hydrazone linkage. Dual targeting with folate and the AS1411 aptamer increased the cancer-targeting efficiency of the nanoparticles, resulting in enhanced cellular uptake (10- and 100-fold increase in uptake compared to single-targeted NPs and non-targeted NPs, respectively) and a higher payload of doxorubicin in epithelial cancer cell lines (MCF-7 and PANC-1), with subsequent higher apoptosis, whereas a normal (noncancerous) cell line (L929) was spared from the adverse effects of doxorubicin. The results indicate that the dual-targeted pH-sensitive biocompatible polymeric nanosystem can act as a potential drug delivery vehicle against various epithelial cancers such as those of the breast, ovary, pancreas, lung, and others.
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Affiliation(s)
- Shantanu V Lale
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi , New Delhi 110016, India
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Goyal K, Koul V, Singh Y, Anand A. Targeted drug delivery to central nervous system (CNS) for the treatment of neurodegenerative disorders: trends and advances. Cent Nerv Syst Agents Med Chem 2014; 14:43-59. [PMID: 25360772 DOI: 10.2174/1871524914666141030145948] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 10/21/2014] [Accepted: 10/28/2014] [Indexed: 06/04/2023]
Abstract
The treatment of brain diseases has been a major challenge since a long time. Although there are several potent drugs, which are highly therapeutic yet their efficiency is marred due to the presence of the Blood Brain Barrier (BBB). The BBB, which is present at the capillary level regulates and monitors the entry of all small and large molecules entering into the brain. Although this barrier is of immense importance to the brain in terms of safety, it becomes a hindrance when it comes to therapy because the drug molecules are unable to reach the brain. Various biomaterial-based strategies are being developed to overcome the BBB and deliver the drug into the brain. These include polymeric nanoparticles, liposomes, solid-lipid nanoparticles (SLNPs), nanogels, implants, etc. This review provides an overview on CNS disorders, BBB, and various delivery strategies available for biologists engaged in translational neuroscience, to target CNS.
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Affiliation(s)
| | | | | | - Akshay Anand
- Neuroscience Research Lab, Department of Neurology, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India.
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Jaiswal M, Lale S, Ramesh NG, Koul V. Synthesis and characterization of positively charged interpenetrating double-network hydrogel matrices for biomedical applications. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2013.07.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Jaiswal M, Naz F, Dinda AK, Koul V. In vitro and in vivo
efficacy of doxorubicin loaded biodegradable semi-interpenetrating hydrogel implants of poly (acrylic acid)/gelatin for post surgical tumor treatment. Biomed Mater 2013; 8:045004. [DOI: 10.1088/1748-6041/8/4/045004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Mahajan S, Koul V, Choudhary V, Shishodia G, Bharti AC. Preparation and in vitro evaluation of folate-receptor-targeted SPION-polymer micelle hybrids for MRI contrast enhancement in cancer imaging. Nanotechnology 2013; 24:015603. [PMID: 23221062 DOI: 10.1088/0957-4484/24/1/015603] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Polymer-SPION hybrids were investigated for receptor-mediated localization in tumour tissue. Superparamagnetic iron oxide nanoparticles (SPIONs) prepared by high-temperature decomposition of iron acetylacetonate were monodisperse (9.27 ± 3.37 nm), with high saturation magnetization of 76.8 emu g(-1). Amphiphilic copolymers prepared from methyl methacrylate and PEG methacrylate by atom transfer radical polymerization were conjugated with folic acid (for folate-receptor specificity). The folate-conjugated polymer had a low critical micellar concentration (0.4 mg l(-1)), indicating stability of the micellar formulation. SPION-polymeric micelle clusters were prepared by desolvation of the SPION dispersion/polymer solution in water. Magnetic resonance imaging of the formulation revealed very good contrast enhancement, with transverse (T(2)) relaxivity of 260.4 mM(-1) s(-1). The biological evaluation of the SPION micelles included cellular viability assay (MTT) and uptake in HeLa cells. These studies demonstrated the potential use of these nanoplatforms for imaging and targeting.
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Affiliation(s)
- Shveta Mahajan
- Centre for Polymer Science and Engineering, Indian Institute of Technology Delhi, New Delhi-110016, India
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Jaiswal M, Gupta A, Agrawal AK, Jassal M, Dinda AK, Koul V. Bi-Layer Composite Dressing of Gelatin Nanofibrous Mat and Poly Vinyl Alcohol Hydrogel for Drug Delivery and Wound Healing Application: In-Vitro and In-Vivo Studies. J Biomed Nanotechnol 2013; 9:1495-508. [DOI: 10.1166/jbn.2013.1643] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Singh D, Choudhary V, Dinda AK, Koul V. Interpenetrating Polymer Networks Based on Gelatin and Poly(Vinyl Pyrollidone): Evaluation of Degradation, Histocompatibility, Cytotoxicity, and Drug Release. INT J POLYM MATER PO 2012. [DOI: 10.1080/00914037.2011.617340] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Paslay LC, Abel BA, Brown TD, Koul V, Choudhary V, McCormick CL, Morgan SE. Antimicrobial Poly(methacrylamide) Derivatives Prepared via Aqueous RAFT Polymerization Exhibit Biocidal Efficiency Dependent upon Cation Structure. Biomacromolecules 2012; 13:2472-82. [DOI: 10.1021/bm3007083] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Lea C. Paslay
- School
of Polymers and High Performance Materials and ∥Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406-5050, United States
- Center
for Biomedical Engineering and §Center for Polymer Science and Engineering, Indian Institute of Technology, Delhi,
New Delhi 110016, India
| | - Brooks A. Abel
- School
of Polymers and High Performance Materials and ∥Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406-5050, United States
- Center
for Biomedical Engineering and §Center for Polymer Science and Engineering, Indian Institute of Technology, Delhi,
New Delhi 110016, India
| | - Tyler D. Brown
- School
of Polymers and High Performance Materials and ∥Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406-5050, United States
- Center
for Biomedical Engineering and §Center for Polymer Science and Engineering, Indian Institute of Technology, Delhi,
New Delhi 110016, India
| | - Veena Koul
- School
of Polymers and High Performance Materials and ∥Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406-5050, United States
- Center
for Biomedical Engineering and §Center for Polymer Science and Engineering, Indian Institute of Technology, Delhi,
New Delhi 110016, India
| | - Veena Choudhary
- School
of Polymers and High Performance Materials and ∥Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406-5050, United States
- Center
for Biomedical Engineering and §Center for Polymer Science and Engineering, Indian Institute of Technology, Delhi,
New Delhi 110016, India
| | - Charles L. McCormick
- School
of Polymers and High Performance Materials and ∥Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406-5050, United States
- Center
for Biomedical Engineering and §Center for Polymer Science and Engineering, Indian Institute of Technology, Delhi,
New Delhi 110016, India
| | - Sarah E. Morgan
- School
of Polymers and High Performance Materials and ∥Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406-5050, United States
- Center
for Biomedical Engineering and §Center for Polymer Science and Engineering, Indian Institute of Technology, Delhi,
New Delhi 110016, India
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Jaiswal M, Koul V. Assessment of multicomponent hydrogel scaffolds of poly(acrylic acid-2-hydroxy ethyl methacrylate)/gelatin for tissue engineering applications. J Biomater Appl 2011; 27:848-61. [DOI: 10.1177/0885328211428524] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The article describes the design of the multicomponent hydrogel system of poly(acrylic acid-HEMA)/gelatin for tissue engineering application. Derivative of polycaprolactone-diol (polycaprolactone diacrylate (PCL-DAr)) was used to cross-link acrylate monomers whereas gelatin was kept free for cell proliferation. Epigallocatechin gallate (EGCG), an anti-oxidant phytochemical, was loaded by diffusion method. Its in vitro release study in PBS (pH 6.5) at 37 ± 0.2°C (75 rpm) revealed a sustained release profile upto 20 days. Fitting of drug release data in Korsmeyer-Peppas model equation revealed probable release mechanism through the value of release coefficient ( n), which was found to depend on formulations composition. Drug-polymer interaction, thermal behavior, and surface morphology were investigated by attenuated total reflectance–Fourier transform infrared (ATR-FTIR) spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopic (SEM). Swelling behavior of hydrogel in PBS (pH 6.5 and 7.4, 0.2 M) and in distilled water was found to increase with increasing AAc/HEMA ratio. Compression modulus decreased from 203 ± 3.7 KPa to 11.6 ± 1.1KPa, at 30% strain, whereas displacement values significantly increased from 3.2 ± 0.2 to 4.7 ± 0.6 mm at 20 N force ( p < 0.05), with increasing AAc/HEMA ratio. Percentage cell viability was analyzed using indirect 3-[4, 5-dimethylthiazolyl-2]-2,5-diphenyltetrazo-liumbromide (MTT) assay with fibroblast L929 cells; showed ≥92.3% cell viability after 24 h incubation. Cell proliferation on the scaffold surface was found to increase with incorporation of HEMA in P(AAc)/G cross-linked hydrogel matrix upto a certain extent. These biocompatible, elastic, and swellable hydrogels can serve as a matrix for drug delivery and tissue engineering applications.
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Affiliation(s)
- Maneesh Jaiswal
- Centre for Biomedical Engineering, Indian Institute of Technology, New Delhi, India, 110016
| | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology, New Delhi, India, 110016
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