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Patel SA, Hassan MK, Naik M, Mohapatra N, Balan P, Korrapati PS, Dixit M. EEF1A2 promotes HIF1A mediated breast cancer angiogenesis in normoxia and participates in a positive feedback loop with HIF1A in hypoxia. Br J Cancer 2024; 130:184-200. [PMID: 38012382 PMCID: PMC10803557 DOI: 10.1038/s41416-023-02509-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND The eukaryotic elongation factor, EEF1A2, has been identified as an oncogene in various solid tumors. Here, we have identified a novel function of EEF1A2 in angiogenesis. METHODS Chick chorioallantoic membrane, tubulogenesis, aortic ring, Matrigel plug, and skin wound healing assays established EEF1A2's role in angiogenesis. RESULT Higher EEF1A2 levels in breast cancer cells enhanced cell growth, movement, blood vessel function, and tubule formation in HUVECs, as confirmed by ex-ovo and in-vivo tests. The overexpression of EEF1A2 could be counteracted by Plitidepsin. Under normoxic conditions, EEF1A2 triggered HIF1A expression via ERK-Myc and mTOR signaling in TNBC and ER/PR positive cells. Hypoxia induced the expression of EEF1A2, leading to a positive feedback loop between EEF1A2 and HIF1A. Luciferase assay and EMSA confirmed HIF1A binding on the EEF1A2 promoter, which induced its transcription. RT-PCR and polysome profiling validated that EEF1A2 affected VEGF transcription and translation positively. This led to increased VEGF release from breast cancer cells, activating ERK and PI3K-AKT signaling in endothelial cells. Breast cancer tissues with elevated EEF1A2 showed higher microvessel density. CONCLUSION EEF1A2 exhibits angiogenic potential in both normoxic and hypoxic conditions, underscoring its dual role in promoting EMT and angiogenesis, rendering it a promising target for cancer therapy.
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Affiliation(s)
- Saket Awadhesbhai Patel
- National Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, 752050, Odisha, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India
| | - Md Khurshidul Hassan
- National Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, 752050, Odisha, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India
| | - Monali Naik
- National Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, 752050, Odisha, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India
| | - Nachiketa Mohapatra
- Apollo Hospitals, Plot No. 251,Old Sainik School Road, Bhubaneswar, 750015, Odisha, India
| | - Poornima Balan
- CSIR-Central Leather Research Institute, Sardar Patel Road, Adyar, Chennai, 600020, India
| | - Purna Sai Korrapati
- CSIR-Central Leather Research Institute, Sardar Patel Road, Adyar, Chennai, 600020, India
| | - Manjusha Dixit
- National Institute of Science Education and Research, School of Biological Sciences, Bhubaneswar, 752050, Odisha, India.
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India.
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Vijayan AN, Solaimuthu A, Murali P, Gopi J, Y MT, R AP, Korrapati PS. Decorin mediated biomimetic PCL-gelatin nano-framework to impede scarring. Int J Biol Macromol 2022; 219:907-918. [PMID: 35952816 DOI: 10.1016/j.ijbiomac.2022.08.029] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/03/2022] [Accepted: 08/06/2022] [Indexed: 11/05/2022]
Abstract
Scars occur as a result of fibrosis after tissue damage or surgery and reports suggest that excessive Transforming growth factor-β (TGF-β) activity during the process of wound healing leads to progressive fibrosis. Decorin is an extracellular matrix (ECM) protein which regulates collagen fibrillogenesis. However, targeted delivery and effective protein therapy remains a challenge owing to degradation byproteases. Hence, we aimed to deliver Decorin in a sustainable mode for the reduction of TGF-β levels and subsequent scar formation. Herein, we have fabricated PCL-Gelatin bio-mimetic scaffolds to optimize the bio-activity and provide localized delivery of recombinant Decorin. The degradation and drug release patterns reveals that this biomaterial is biodegradable and offers sustained release of the recombinant Decorin. Decorin loaded nanofiber displayed lower adhesion and proliferation rates in in-vitro conditions. Moreover, Decorin loaded scaffolds demonstrated morphological changes in cells, specifically targeting the myofibroblast. The expression of TGF-β was also scrutinized to understand the effect of Decorin loaded nanofibers. Besides, in the in-vitro fibrotic model, Decorin loaded nanofibers efficiently reduced the expression of ECM related proteins. Therefore, we report the sustained delivery of the recombinant Decorin from nanofiber dressing to potentially obstruct scar formation during the process of wound healing.
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Affiliation(s)
- Ane Nishitha Vijayan
- Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600020, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Anbuthiruselvan Solaimuthu
- Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600020, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Padmaja Murali
- Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600020, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Janani Gopi
- Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600020, Tamil Nadu, India
| | - Madhan Teja Y
- Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600020, Tamil Nadu, India
| | - Akshaya Priya R
- Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600020, Tamil Nadu, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai 600020, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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Sreekumar S, Vijayan V, Singh F, Sudhakar M, Lakra R, Korrapati PS, Kiran MS. White to brown adipocyte transition mediated by Apigenin via VEGF-PRDM16 signaling. J Cell Biochem 2022; 123:1793-1807. [PMID: 35926149 DOI: 10.1002/jcb.30316] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 11/08/2022]
Abstract
The dysregulated energy metabolism in white adipose tissues results in derangement of biological signaling resulting in obesity. Lack of vascularization in these white adipose tissues is one of the major reasons for dysregulated energy metabolism. Not much work has been done in this direction to understand the role of angiogenesis in white adipose tissue metabolism. In the present study, we evaluated the effect of angiogenic modulator in the metabolism of white adipocyte (WAC). Bioactive Apigenin was selected and its angiogenic ability was studied. Apigenin was shown to be highly proangiogenic hence the effect of Apigenin on de novo and trans-differentiation of WAT was studied. Apigenin showed enhanced de novo differentiation and trans-differentiation of mouse WAC into brown-like phenotype. To understand the effect of Apigenin on adipose tissue vasculature, coculture studies were conducted. Cross talk between endothelial cell and adipocytes were observed in coculture studies. Gene expression studies of cocultured cells revealed that browning of WAC occurred by triggering the expression of Vascular endothelial growth factor A. The study provides a new insight for inducing metabolic shift in WACs by modulation of angiogenesis in WAC microenvironment by the upregulation of PRDM16 cascade to trigger browning for the treatment of obesity.
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Affiliation(s)
- Sreelekshmi Sreekumar
- Biological Materials Laboratory, Council of Scientific and Industrial Research-Central Leather Research Institute, Chennai, Tamil Nadu, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Vinu Vijayan
- Biological Materials Laboratory, Council of Scientific and Industrial Research-Central Leather Research Institute, Chennai, Tamil Nadu, India
| | - Fathe Singh
- Biological Materials Laboratory, Council of Scientific and Industrial Research-Central Leather Research Institute, Chennai, Tamil Nadu, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Manu Sudhakar
- Department of Human Genetics, Sri Ramachandra Institute of Higher Education and Research (DU), Chennai, India
| | - Rachita Lakra
- Biological Materials Laboratory, Council of Scientific and Industrial Research-Central Leather Research Institute, Chennai, Tamil Nadu, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, Council of Scientific and Industrial Research-Central Leather Research Institute, Chennai, Tamil Nadu, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Manikantan Syamala Kiran
- Biological Materials Laboratory, Council of Scientific and Industrial Research-Central Leather Research Institute, Chennai, Tamil Nadu, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Vijayan V, Lakra R, Korrapati PS, Kiran MS. Lanthanum oxide nanoparticle-collagen bio matrix induced endothelial cell activation for sustained angiogenic response for biomaterial integration. Colloids Surf B Biointerfaces 2022; 216:112589. [PMID: 35660195 DOI: 10.1016/j.colsurfb.2022.112589] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 04/20/2022] [Accepted: 05/19/2022] [Indexed: 01/08/2023]
Abstract
Rare earth lanthanum oxide nanoparticle reinforced collagen biomatrix that elicited the endothelial cell activation to promote angiogenesis for biomaterial integration was developed and evaluated in the present study. The structural integrity of collagen was not compromised on crosslinking of lanthanum oxide nanoparticle to collagen biomolecule. As-synthesised collagen biomatrix was shown to have improved mechanical strength, a lesser susceptibility to proteolytic degradation and good swelling properties. Superior cytocompatibility, hemocompatibility and minimal ROS generation was observed with Lanthanum oxide nanoparticle reinforced collagen bio matrix. The Lanthanum oxide nanoparticle reinforced collagen bio matrix elicited endothelial cell activation eliciting pro-angiogensis as observed in tube formation and aortic arch assays. The bio-matrix promoted the infiltration and proliferation of endothelial cells which is an unexplored domain in the area of tissue engineering that is very essential for biomaterial integration into host tissue. The wound healing effect of Lanthanum oxide nanoparticle stabilized collagen showed enhanced cell migration in vitro in cells maintained in Lanthanum oxide nanoparticle reinforced collagen bio matrix. The study paves the way for developing rare earth-based dressing materials which promoted biomatrix integration by enhancing vascularisation for tissue regenerative applications in comparison with traditional biomaterials.
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Affiliation(s)
- Vinu Vijayan
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai, Tamil Nadu 600020, India; University of Madras, Chennai, Tamil Nadu 600005, India
| | - Rachita Lakra
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai, Tamil Nadu 600020, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai, Tamil Nadu 600020, India; Academy of Scientific and Innovative Research, Council of Scientific and Industrial Research, Central Leather Research Institute, Chennai, Tamil Nadu 600020, India
| | - Manikantan Syamala Kiran
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai, Tamil Nadu 600020, India; University of Madras, Chennai, Tamil Nadu 600005, India; Academy of Scientific and Innovative Research, Council of Scientific and Industrial Research, Central Leather Research Institute, Chennai, Tamil Nadu 600020, India.
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Indrakumar J, Balan P, Murali P, Solaimuthu A, Vijayan AN, Korrapati PS. Applications of molybdenum oxide nanoparticles impregnated collagen scaffolds in wound therapeutics. J Trace Elem Med Biol 2022; 72:126983. [PMID: 35537228 DOI: 10.1016/j.jtemb.2022.126983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 02/10/2022] [Accepted: 04/07/2022] [Indexed: 10/18/2022]
Abstract
INTRODUCTION The highly complex pathophysiology of the wound micro-environment demands the development of a multi-faceted system which would enhance the wound healing cascade. Incorporation of nanotechnology in wound therapeutics has opened up new avenues to tourment the diseased condition. Amongst the various types of nanoparticles molybdenum oxide nanoparticles posses various inherent properties that makes it a versatile material to be used in healing. Incorporation of Molybdenum nanoparticles into collagen scaffolds would provide a synergistic and sequential healing process ensuring the formation of a fully functional tissue. MATERIALS AND METHODS The physico-chemical characterization of the synthesized materials were done using SEM and FT-IR techniques. The bicompatibility and cell proliferation were tested using HaCaT cell lines. Pro-angiogenic ability of the scaffold was tested using CAM assay and Chick aortic arch assay. Finally the in-vivo wound healing ability of the material was tested by creating wound of about 6 cm2 on the dorsal side of Wistar rats and observed for about 21 days. RESULTS The characterization of the scaffold revealed the presence MoO3 nanoparticles and their structural integrity within the scaffold. The synthesized MoO3-collagen nanocomposite was found to be biocompatible and hemocompatible. The in-vitro studies demonstrated that the MoO3-collagen scaffold significantly increased the cell adhesion and migration to nearly 2 fold. The MoO3 embedded collagen sheets synergistically favoured neovascularization and re-epithelization,which would potentially enhance therapeutic efficiency of the scaffold. The nanocomposite also encouraged results in in-vivo analysis, the Wistar rats treated with MoO3-collagen scaffolds showed complete healing in about 15 days. CONCLUSION The fabricated MoO3-collagen scaffold was found to play an important role in all major events of wound healing such as adhesion, migration, proliferation and angiogenesis. The in-vivo healing assay also proved that the healing rate of animals treated with the samples was comparatively faster. Further research using various trace elements would open up promising avenues in healing therapeutics.
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Affiliation(s)
- Janani Indrakumar
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | - Poornima Balan
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | - Padmaja Murali
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | | | - Ane Nishitha Vijayan
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India.
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Vijayan AN, Indrakumar J, Gomathinayagam S, Gothandam KM, Korrapati PS. Erratum to: Bi-Functional Aspects of Peptide Decorated PLGA Nanocarriers for Enhanced Translocation Across the Blood-Brain Barrier through Macropinocytosis. Macromol Res 2022. [DOI: 10.1007/s13233-022-0200-z] [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: 10/17/2022]
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Rathinavel S, Indrakumar J, Korrapati PS, Dharmalingam S. Synthesis and fabrication of amine functionalized SBA-15 incorporated PVA/Curcumin nanofiber for skin wound healing application. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128185] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Rathinavel S, Korrapati PS, Kalaiselvi P, Dharmalingam S. Mesoporous silica incorporated PCL/Curcumin nanofiber for wound healing application. Eur J Pharm Sci 2021; 167:106021. [PMID: 34571179 DOI: 10.1016/j.ejps.2021.106021] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [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: 06/29/2021] [Revised: 09/23/2021] [Accepted: 09/23/2021] [Indexed: 01/03/2023]
Abstract
Electrospinning, a recent fast-emerging technique highly applicable in the production of nanofibers has gained vast recognition owing to its explicit applications in various domains. Amongst which, the production of nanoscaffolds for wound healing applications has been focused recently due to advantages over conventional wound healing methods. In the present research, a composite nanoscaffold comprising SBA-15 (Santa Barbara Amorphous), amine functionalized SBA-15 polycaprolactone (PCL) and curcumin was investigated for its potentiality in wound healing therapeutics. The high biocompatibility and cell adhesion of amine functionalized SBA-15 and the widely explored antimicrobial properties of curcumin added benefit for the wound healing target. The prepared highly interconnected electrospun fibers with porous structure were characterized through various studies such as FTIR, XRD, SEM and EDAX. Further, antibacterial studies against both Gram positive (Bacillus subtilis) and Gram negative (Escherichia coli) strains revealed an improved zone of inhibition. Major invitro studies such as cell migration, proliferation, bio-compatibility was experimented through cell adhesion and live and dead assay using Swiss 3T6 cell lines. In vivo studies on female Wister rats using the fabricated nanofibers incorporated with curcumin and amine functionalized SBA-15 showed 99% scar-less wound healing within 21 days. Re-epithelization of tissue, collagen deposition and formation of granulation tissue were observed from the results of Hematoxylin-Eosin and Masson's tri-chrome staining. From the observations, it can be concluded that the fabricated nanoscaffold could be an effective substrate for wound healing therapeutics.
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Affiliation(s)
- Saranya Rathinavel
- Department of Mechanical Engineering, Anna University, Chennai, Tamil Nadu, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai, 600 020, India
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Rallapalli S, Guhathakurta S, Bishi DK, Subbarayan R, Mathapati S, Korrapati PS. A critical appraisal of humanized alternatives to fetal bovine serum for clinical applications of umbilical cord derived mesenchymal stromal cells. Biotechnol Lett 2021; 43:2067-2083. [PMID: 34499291 DOI: 10.1007/s10529-021-03180-4] [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: 02/18/2021] [Accepted: 08/19/2021] [Indexed: 12/22/2022]
Abstract
OBJECTIVE The study is aimed to verify the possibility of using humanized alternatives to fetal bovine serum (FBS) such as umbilical cord blood plasma (CBP) and AB+ plasma to support the long-term growth of mesenchymal stromal cells (MSCs) derived from the umbilical cord. We hypothesized that umbilical CBP would be a potential substitute to FBS, especially for small scale autologous clinical transplantations. METHODS The MSCs were cultured for six consecutive passages to evaluate xeno-free media's ability to support long-term growth. Cell proliferation rates, colony-forming-unit (CFU) efficiency and population doublings of expanded MSCs, were investigated. Ex vivo expanded MSCs were further characterized using flow cytometry and quantitative PCR. The impact of cryopreservation and composition of cryomedium on phenotype, viability of MSC was also assessed. RESULTS Our results on cell proliferation, colony-forming unit efficiency suggested that the expansion of the cells was successfully carried out in media supplemented with humanized alternatives. MSCs showed lower CFU counts in FBS (~ 25) than humanized alternatives (~ 35). The gene expression analysis revealed that transcripts showed significant differential expression by two to three folds in the FBS group compared with MSCs grown in medium with humanized alternatives (p < 0.05). In addition, MSCs grown in a medium with FBS had more osteogenic activity, a signature of unwanted differentiation. The majority of ex vivo expanded MSCs at early and late passages expressed CD44+, CD73+, CD105+, CD90+, and CD166+ in all the experimental groups tested (~ 90%). In contrast to the other MSC surface markers, expression levels of STRO-1+ (~ 21-10%) and TNAP+ (~ 29-11%) decreased with the increase in passage number for MSCs cultured in a FBS-supplemented medium (p < 0.05). CONCLUSION Our results established that CBP supported culture of umbilical cord tissue-derived MSCs and is a safer Xeno free replacement to FBS. The use of CBP also enables the storage of umbilical cord tissue derived MSCs in patient-specific conditions to minimize adverse events if cells are delivered directly to the patient.
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Affiliation(s)
- Suneel Rallapalli
- Biological Material Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, 600020, India
| | | | - Dillip Kumar Bishi
- Department of Biotechnology, Rama Devi Women's University, Bhubaneswar, India
| | | | - Santosh Mathapati
- Translational Health Science and Technology Institute, Faridabad, India
| | - Purna Sai Korrapati
- Biological Material Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, 600020, India.
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Lakra R, Kiran MS, Korrapati PS. Effect of magnesium ascorbyl phosphate on collagen stabilization for wound healing application. Int J Biol Macromol 2020; 166:333-341. [PMID: 33122062 DOI: 10.1016/j.ijbiomac.2020.10.193] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/19/2020] [Accepted: 10/24/2020] [Indexed: 12/26/2022]
Abstract
Wound healing is a complex process which requires appropriate structural support for restoration of tissue continuity and function. Collagen can act as a template for cellular activities but poor physico-chemical properties necessitates the stabilization of collagen without impairing its structure and function. This study investigates the effect of magnesium ascorbyl phosphate (MAP) on collagen with reference to physico-chemical properties. Incorporation of MAP enhanced the rate of collagen fibrillation signifying increased interaction at reduced time interval. MAP did not induce any changes in the secondary structure of collagen while there was an increase in shear viscosity with increase in shear stress at different shear rate. MAP stabilized collagen film exhibited higher denaturation temperature and showed an increase in Young's Modulus when compared with that of collagen film. In vivo studies showed complete wound closure on day 16 in case of stabilized collagen film. Mechanical properties of healed skin revealed that MAP collagen film treated rat skin completely regained its properties similar to that of normal skin thereby making them a potential candidate for wound healing application.
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Affiliation(s)
- Rachita Lakra
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - Manikantan Syamala Kiran
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai 600 020, India.
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Shoba E, Lakra R, Kiran MS, Korrapati PS. 3 D nano bilayered spatially and functionally graded scaffold impregnated bromelain conjugated magnesium doped hydroxyapatite nanoparticle for periodontal regeneration. J Mech Behav Biomed Mater 2020; 109:103822. [PMID: 32543397 DOI: 10.1016/j.jmbbm.2020.103822] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/15/2020] [Accepted: 04/20/2020] [Indexed: 12/11/2022]
Abstract
Chronic periodontal disease affect the tissues supporting around the teeth like gingival tissue, connective tissue, alveolar bone and periodontal ligaments. Hitherto, periodontal treatment was targeted to selectively repopulate the defect site with cell that has capability to regenerate lost tissue by promoting the concept of guided tissue regeneration but it requires second surgery due to non- biodegradability. The use of polymeric biodegradable nanofibrous coated scaffold that have the ability to deliver bioactives required for regeneration to occur is relatively a newer concept. The functionalization of polymeric scaffold with Bromelain and magnesium doped hydroxyapatite nanoparticle enhanced the mechanical, physico-chemical, thermal and biological properties of the scaffold by imitating the intricate extracellular matrix (ECM) architecture which provided the necessary bioactive cues that offered control over cellular functions by showing antibacterial potential, hemocompatibility and increasing the proliferation and migration rate in vitro. In addition, in ovo chicken chorioallantoic membrane assay and ex vivo aortic ring assay confirmed the efficacy of the developed scaffold by encouraging angiogenesis required for maintaining its viability after implanting onto the infected area. Further, the scaffold positively interacted with the host and actively contributed to the process of tissue regeneration in vivo in Wistar rat model.
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Affiliation(s)
- Ekambaram Shoba
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Chennai, 600 020, India
| | - Rachita Lakra
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Chennai, 600 020, India
| | - Manikantan Syamala Kiran
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Chennai, 600 020, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Chennai, 600 020, India.
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Rathinavel S, Ekambaram S, Korrapati PS, Sangeetha D. Design and fabrication of electrospun SBA-15-incorporated PVA with curcumin: a biomimetic nanoscaffold for skin tissue engineering. Biomed Mater 2020; 15:035009. [PMID: 31935710 DOI: 10.1088/1748-605x/ab6b2f] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Fabricating and designing a scaffold is a complex and highly challenging process in the current scenario. The present study deals with the design and fabrication of electrospun Santa Barbara Amorphous (SBA)-15-incorporated polyvinyl alcohol (PVA) with curcumin, which can be used as a biomimetic nanoscaffold for skin tissue engineering. Curcumin was selected due to its effective anti-microbial and anti-inflammatory properties. SBA-15 was selected for its characteristic drug-carrying potential. Fourier transform infrared spectroscopy and x-ray diffraction characterizations of the fabricated nanofiber demonstrated the interaction of PVA, SBA-15 and curcumin. The scanning electron microscopy results depicted that the nanofiber was highly interconnected with a porous structure mimicking the extracellular matrix. The nanofibrous scaffold showed a higher percentage of cell migration, proliferation, cytocompatibility and biocompatibility with absence of cytotoxicity which was evidenced from the results of MTT assay, cell adhesion and live/dead assay using HaCaT cells. The results of the anti-bacterial test depicted that the synthesized nanofiber forms a potent material for skin wound-healing therapeutics. The in vitro drug release study performed over a period of 80 h revealed a sustained release pattern of curcumin from the SBA-15-incorporated PVA nanofiber. Finally, the in vivo results confirmed that SBA-15-incorporated PVA nanofiber with curcumin showed efficient wound-healing activities.
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Solaimuthu A, Vijayan AN, Murali P, Korrapati PS. Nano-biosensors and their relevance in tissue engineering. Current Opinion in Biomedical Engineering 2020. [DOI: 10.1016/j.cobme.2019.12.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Abstract
Conventional cancer therapies possess a plethora of limitations which led to the awakening of nanotechnology and nanomedicine. However, technological success is widely dependent on complete understanding of the complexity and heterogeneity of tumor biology on one hand and nanobiointeractions associated with challenges of synthesis, translation, and commercialization on the other. The present study therefore deals with one such targeted approach aiming at synthesizing, characterizing, and understanding the efficacy of molybdenum oxide nanoparticles. The phase structure, morphology, and elemental composition of the synthesized nanoparticles were characterized using Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. The cytotoxicity studies revealed that the IC50 vales of molybdenum trioxide (MoO3) particles against skin cancer cells (melanoma and non-melanoma) were around 200-300 μg. The nanoparticles were found to induce mitochondrial-mediated apoptosis driven by the apoptotic genes such as BAX and Bcl2. Molybdenum being a cofactor for the majority of metabolic enzymes could have triggered the selective internalization of the nanoparticles which in turn could have modified the granularity of the cytoplasm and subsequently lead to mitochondrial-mediated apoptosis. Further, the anti-angiogenic property of MoO3 nanoparticles was corroborated using Chick chorioallantoic membrane (CAM) assay and aortic ring assay. Taken together , unraveling the role of MoO3 nanoparticles in cancer and angiogenesis opens up venues for nano biological intervention of selective cancer cell targeting with minimal damage to the normal cells using natural trace elements that are generally known to influence various metabolic enzymes.
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Affiliation(s)
- Janani Indrakumar
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu, 600020, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu, 600020, India.
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15
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Balan P, Indrakumar J, Murali P, Korrapati PS. Bi-faceted delivery of phytochemicals through chitosan nanoparticles impregnated nanofibers for cancer therapeutics. Int J Biol Macromol 2020; 142:201-211. [DOI: 10.1016/j.ijbiomac.2019.09.093] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/05/2019] [Accepted: 09/12/2019] [Indexed: 12/17/2022]
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16
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Lakra R, Kiran MS, Korrapati PS. Electrospun gelatin-polyethylenimine blend nanofibrous scaffold for biomedical applications. J Mater Sci Mater Med 2019; 30:129. [PMID: 31776679 DOI: 10.1007/s10856-019-6336-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
In this study, gelatin-polyethylenimine blend nanofibers (GEL/PEI) were fabricated via electrospinning with different ratios (9:1, 6:1, 3:1) to integrate the properties of both the polymers for evaluating its biomedical application. From scanning electron microscopy, the average diameter of blend nanofibers (265 ± 0.074 nm to 340 ± 0.088 nm) was observed to be less than GEL nanofibers (403 ± 0.08 nm). The incorporation of PEI with gelatin resulted in improved thermal stability of nanofibers whereas the Young's modulus was observed to be higher at 9:1 ratio when compared with other ratios. The in vitro studies showed that the GEL/PEI nanofibers with 9:1 ratio promoted better cell adhesion and viability. GEL/PEI nanofibers with 9:1 and 6:1 showed hemolysis within the permissible limits. From the results, it could be interpreted that GEL/PEI nanofibers with 9:1 ratio proved to be a better scaffold thereby making them a potential candidate for tissue engineering applications.
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Affiliation(s)
- Rachita Lakra
- Biological Materials Laboratory, Council of Scientific and Industrial Research, Central Leather Research Institute, Adyar, Chennai, 600020, India
| | - Manikantan Syamala Kiran
- Biological Materials Laboratory, Council of Scientific and Industrial Research, Central Leather Research Institute, Adyar, Chennai, 600020, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, Council of Scientific and Industrial Research, Central Leather Research Institute, Adyar, Chennai, 600020, India.
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17
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Vijayan V, Sreekumar S, Singh F, Govindarajan D, Lakra R, Korrapati PS, Kiran MS. Praseodymium–Cobaltite-Reinforced Collagen as Biomimetic Scaffolds for Angiogenesis and Stem Cell Differentiation for Cutaneous Wound Healing. ACS Appl Bio Mater 2019; 2:3458-3472. [DOI: 10.1021/acsabm.9b00405] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Vinu Vijayan
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
- University of Madras, Chennai, Tamil Nadu 600025, India
| | - Sreelekshmi Sreekumar
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
- Academy of Scientific and Innovative Research, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
| | - Fathe Singh
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
- Academy of Scientific and Innovative Research, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
| | - Dharunya Govindarajan
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
| | - Rachita Lakra
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
- Academy of Scientific and Innovative Research, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
| | - Manikantan Syamala Kiran
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
- University of Madras, Chennai, Tamil Nadu 600025, India
- Academy of Scientific and Innovative Research, CSIR-Central Leather Research Institute, Adyar, Chennai, Tamil Nadu 600020, India
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18
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Satish A, Korrapati PS. Strategic design of peptide-decorated aligned nanofibers impregnated with triiodothyronine for neural regeneration. J Tissue Eng Regen Med 2019; 13:753-770. [PMID: 30770646 DOI: 10.1002/term.2822] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 12/05/2018] [Accepted: 02/13/2019] [Indexed: 11/11/2022]
Abstract
Nerve injuries are often debilitating as its regeneration occurs in a slow and laborious manner. Remediation of nerve injury is a colossal task as functional restoration in larger gaps seldom occurs due to the complex nerve regeneration mechanism. A nanofiber-based graft material has been fabricated to provide topographical and biochemical cues to encourage neural differentiation. Laminin plays a crucial role in supporting peripheral nerve regeneration and hence aligned polyvinyl cinnamate nanofibers surface-conjugated with laminin-derived cell-adhesion peptides have been fabricated to improve selective neural adhesion and regeneration. Further, triiodothyronine has been encapsulated within the nanofibers enabling its sustained release so as to bolster regeneration and reinstate the lost functionality to the damaged nerve. The fabricated nanofibers were characterized for its physicochemical, morphological, and topographical properties. Nanofibers were biocompatible, improved cell adhesion rate, and illustrated favourable interaction with cells. Gene expression (showed 9.5 and 4.1 fold increase in β-tubulin and MAP 2 expression, respectively) and protein expression (immunofluorescence, flow cytometry, and western blot) studies confirmed the positive influence of the scaffold over cell differentiation. The studies were extrapolated to adult zebrafish model with a surgical incision in posterior lateral line. The biocomposite treated group showed earlier functional restoration of the nerve compared with control groups detected by touch-evoked response. Thus, the combination of aligned nanofibers providing topographical cue, along with the peptides and triiodothyronine serving as biochemical cues, has a robust potential to restore functionality to the injured nerve, thereby opening avenues for fabrication of regenerative nerve grafts.
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Affiliation(s)
- Aishwarya Satish
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Chennai, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Chennai, India
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19
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Satish A, Korrapati PS. Nanofiber-Mediated Sustained Delivery of Triiodothyronine: Role in Angiogenesis. AAPS PharmSciTech 2019; 20:110. [PMID: 30756201 DOI: 10.1208/s12249-019-1326-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 01/31/2019] [Indexed: 12/20/2022] Open
Abstract
Angiogenesis is a vital component of the orchestrated wound healing cascade and tissue regeneration process, which has a therapeutic prominence in treatment of ischemic vascular diseases and certain cardiac conditions. Based on its eminence, several strategies using growth factors have been studied to initiate angiogenesis. However, growth factors are expensive and have short half-life. In this work, sustained release of triiodothyronine, which plays a crucial role in stimulating growth factors and other signaling pathways that are instrumental in initiating angiogenesis, has been attempted through electrospun polycaprolactone nanofibers. This delivery system enabled the slow and sustained delivery of triiodothyronine into the micro-environment, reducing seepage of excess into systemic circulation and eliminating the necessity of repeated dosage forms. It was observed that triiodothyronine-incorporated nanofibers exhibited favorable interaction with cells (phalloidin staining of actin filaments) and also enhanced the rate of endothelial proliferation, migration, and adhesion. The angiogenic potential of these nanofibers was further corroborated through chorioallantoic membrane and rat aortic ring assay (demonstrating cell sprouting area of 3.3 ± 0.71 mm2 compared to 1.2 ± 0.01 mm2 in control). The nanofiber matrix thus fabricated demonstrated a vibrant therapeutic potential to induce angiogenesis. Triiodothyronine also plays a significant role in wound healing independent of initiating angiogenesis. This further substantiates the positive impact of this delivery system as a dressing material for chronic wound therapeutics, ischemic vascular diseases, and certain cardiac conditions.
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20
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Janani I, Lakra R, Kiran MS, Korrapati PS. Selectivity and sensitivity of molybdenum oxide-polycaprolactone nanofiber composites on skin cancer: Preliminary in-vitro and in-vivo implications. J Trace Elem Med Biol 2018; 49:60-71. [PMID: 29895373 DOI: 10.1016/j.jtemb.2018.04.033] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 04/06/2018] [Accepted: 04/24/2018] [Indexed: 02/01/2023]
Abstract
Cancer nanomedicine has emerged as a revolution in the last decade opening up promising strides for the cancer treatment. The major challenge in these therapeutic approaches resides in the failure of clinical trials owing to the immunological cancer microenvironment. Therefore, the success of next generation nanomedicine depends on tunable physicochemical nanomaterial design and corresponding clinical trials by integrating targeted delivery with mitigated toxicity. The present study deals with the fabrication of nanofibrous scaffold impregnated with molybdenum nanoparticles for targeted skin cancer therapeutics. Molybdenum oxide, a transitional metal oxide is gaining rapid importance due to its vital role in cellular and molecular metabolism. Polycaprolactone nanofibers were chosen as a matrix to localize the nanoparticles topically facilitating selective apoptosis of the tumor cells over the normal cells with mitigated side effects. The scaffold was designed to tailor the physicochemical, mechanical and biological suitability for skin cancer (melanoma and non melanoma). The designed scaffold was found to reduce more than 50% cell viability of the cancer cells selectively through apoptosis as confirmed using AO/PI staining and the probable mechanism could be attributed to the induction of mitochondria dependent apoptosis as observed by JC1 dye staining. In-vivo trials in zebra fish were found to reduce cancer progression by more than 30% in 14 days. The fabricated molybdenum trioxide nano constructs not only serve as tunable targeted systems but also open venues capable of ferrying chemotherapeutic drugs sparing normal cells alleviating the trauma due to side effects.
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Affiliation(s)
- Indrakumar Janani
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | - Rachita Lakra
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India
| | | | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai 600020, India.
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21
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Shoba E, Lakra R, Kiran MS, Korrapati PS. Strategic design of cardiac mimetic core-shell nanofibrous scaffold impregnated with Salvianolic acid B and Magnesium l-ascorbic acid 2 phosphate for myoblast differentiation. Mater Sci Eng C Mater Biol Appl 2018; 90:131-147. [PMID: 29853076 DOI: 10.1016/j.msec.2018.04.056] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 04/05/2018] [Accepted: 04/18/2018] [Indexed: 01/20/2023]
Abstract
The major loss of myocardial tissue extracellular matrix after infarction is a serious complication that leads to heart failure. Regeneration and integration of damaged cardiac tissue is challenging since the functional restoration of the injured myocardium is an incredible task. The injured micro environment of myocardium fails to regenerate spontaneously. The emergence of nano-biomaterials would be a promising approach to regenerate such a damaged cardiomyocytes tissue. Here, we have fabricated a dual bioactive embedded nanofibrous cardiac patch via coaxial electrospinning technique, to mimic the topographical and chemical cues of the natural cardiac tissue. The proportion and the concentration of the polymers were optimized for tailored delivery of bioactives from a spatio-temporally designed scaffold. The functionalization of polymeric core shell nanofibrous scaffold with dual bioactives enhanced the physico-chemical and bio-mechanical properties of the scaffolds that has resulted in a 3-dimensional topography mimicking the natural cardiac like extracellular matrix. The sustained delivery of bioactive signals, improved cell adhesion, proliferation, migration and differentiation could be attributed to its highly interconnected nanofibrous matrix with good extended morphology. Further, the expression of cardiac specific markers were found to increase on investigation of mRNA by real time PCR studies and proteins by immunofluorescence and western blotting techniques, confirming cell - biomaterial interactions. Flow cytometry analysis authenticated a potent mitochondrial membrane potential of cells treated with nanocomposite. In addition, in ovo studies in chicken chorioallantoic membrane assay confirm the efficacy of the developed scaffold in inducing angiogenesis required for maintaining its viability after transplantation onto the infarcted zone. These promising results demonstrate the potential of the composite nanofibrous scaffold as an effective biomaterial substrate for cardiac regeneration providing cues for development of novel cardiac therapeutics.
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Affiliation(s)
- Ekambaram Shoba
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai, 600020, Tamil Nadu, India
| | - Rachita Lakra
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai, 600020, Tamil Nadu, India
| | - Manikantan Syamala Kiran
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai, 600020, Tamil Nadu, India
| | - Purna Sai Korrapati
- Biological Materials Laboratory, CSIR - Central Leather Research Institute, Adyar, Chennai, 600020, Tamil Nadu, India.
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22
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Duraipandy N, Lakra R, Korrapati PS, Sudhakaran PR, Kiran MS. Targeting Pyruvate Kinase M2, β Catenin Signaling by Juglone Silver Nano Framework for Selective Cancer Cell Death. ChemistrySelect 2018. [DOI: 10.1002/slct.201800152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- N. Duraipandy
- Biological Materials Laboratory; CSIR-Central Leather Research Institute; Adyar Chennai-20
- Academy of Scientific and Innovative Research; CSIR-CLRI; Chennai-20
| | - Rachita Lakra
- Biological Materials Laboratory; CSIR-Central Leather Research Institute; Adyar Chennai-20
| | - Purna Sai Korrapati
- Biological Materials Laboratory; CSIR-Central Leather Research Institute; Adyar Chennai-20
- Academy of Scientific and Innovative Research; CSIR-CLRI; Chennai-20
| | - Perumana R. Sudhakaran
- Department of Computational Biology and Bioinformatics; University of Kerala, Kariavattom, Thiruvananthapuram; Kerala India 695581
| | - Manikantan Syamala Kiran
- Biological Materials Laboratory; CSIR-Central Leather Research Institute; Adyar Chennai-20
- Academy of Scientific and Innovative Research; CSIR-CLRI; Chennai-20
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23
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Babitha S, Annamalai M, Dykas MM, Saha S, Poddar K, Venugopal JR, Ramakrishna S, Venkatesan T, Korrapati PS. Fabrication of a biomimetic ZeinPDA nanofibrous scaffold impregnated with BMP-2 peptide conjugated TiO 2 nanoparticle for bone tissue engineering. J Tissue Eng Regen Med 2017; 12:991-1001. [PMID: 28871656 DOI: 10.1002/term.2563] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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: 01/24/2017] [Revised: 07/19/2017] [Accepted: 08/25/2017] [Indexed: 12/28/2022]
Abstract
A biomimetic Zein polydopamine based nanofiber scaffold was fabricated to deliver bone morphogenic protein-2 (BMP-2) peptide conjugated titanium dioxide nanoparticles in a sustained manner for investigating its osteogenic differentiation potential. To prolong its retention time at the target site, BMP-2 peptide has been conjugated to titanium dioxide nanoparticles owing to its high surface to volume ratio. The effect of biochemical cues from BMP-2 peptide and nanotopographical stimulation of electrospun Zein polydopamine nanofiber were examined for its enhanced osteogenic expression of human fetal osteoblast cells. The sustained delivery of bioactive signals, improved cell adhesion, mineralization, and differentiation could be attributed to its highly interconnected nanofibrous matrix with unique material composition. Further, the expression of osteogenic markers revealed that the fabricated nanofibrous scaffold possess better cell-biomaterial interactions. These promising results demonstrate the potential of the composite nanofibrous scaffold as an effective biomaterial substrate for bone regeneration.
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Affiliation(s)
- S Babitha
- Biomaterials Department, CSIR-Central Leather Research Institute, Chennai, India
| | | | - Michal Marcin Dykas
- NUSNNI-NanoCore, National University of Singapore (NUS), Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore (NUS), Singapore
| | - Surajit Saha
- NUSNNI-NanoCore, National University of Singapore (NUS), Singapore
| | - Kingshuk Poddar
- NUSNNI-NanoCore, National University of Singapore (NUS), Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore (NUS), Singapore
| | - Jayarama Reddy Venugopal
- Center for Nanofibers and Nanotechnology, Dept of Mechanical Engineering, National University of Singapore (NUS), Singapore
| | - Seeram Ramakrishna
- Center for Nanofibers and Nanotechnology, Dept of Mechanical Engineering, National University of Singapore (NUS), Singapore.,Guangdong-Hongkong-Macau Institute of CNS Regeneration (GHMICR), Jinan University, Guangzhou, China
| | - Thirumalai Venkatesan
- NUSNNI-NanoCore, National University of Singapore (NUS), Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore (NUS), Singapore.,Department of Electrical Engineering, National University of Singapore (NUS), Singapore.,Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore.,Department of Physics, Faculty of Science, National University of Singapore (NUS), Singapore
| | - Purna Sai Korrapati
- Biomaterials Department, CSIR-Central Leather Research Institute, Chennai, India
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24
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Satish A, Korrapati PS. Tailored release of triiodothyronine and retinoic acid from a spatio-temporally fabricated nanofiber composite instigating neuronal differentiation. Nanoscale 2017; 9:14565-14580. [PMID: 28932862 DOI: 10.1039/c7nr05918c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Regeneration of the central and peripheral nervous system is challenging since the functional restoration of injured nerves is an incredible task. The fabrication of an ideal nerve guide that fulfills the requirement to regenerate nerve tissue is a herculean challenge requiring a combination of both biochemical and topographical cues. The present study explores the combinatorial effect of aligned nanofibers and the regulated delivery of triiodothyronine and retinoic acid on nerve regeneration. A sequential release mechanism is adopted in fabricating the nanofiber scaffold, with triiodothyronine incorporated into the nanofiber shell ensuring its prior release, followed by retinoic acid (entrapped within zein nanoparticles) from the core. The composite nanofibers thus fabricated possess excellent mechanical, physical and thermal properties and good topographical morphology and were highly biocompatible. The nanofibers were scrutinized for their efficacy in stimulating differentiation to a neuronal phenotype. The elongation factor (E-factor) of the neural cells had doubled in the bioactive incorporated composite compared to other scaffolds, as observed on phalloidin staining of their cytoskeleton, which endorsed enhanced neural differentiation on the fabricated nanofiber scaffold. There was a significant increase in the expression of neural-lineage specific markers on investigation of mRNA by real time PCR, showing a 10 fold increase in the gene expression of β-III-tubulin, a 5.5 fold increase for microtubule associated protein 2 gene and 3.5 fold for neurofilament M gene in the cells cultured over bioactive incorporated aligned nanofiber composites. Similarly protein expression was analyzed by immunofluorescence and flow cytometry studies, which showed an increase in the expression of β-III-tubulin in the composite nanofiber. This corroborates that neuronal differentiation is enhanced by the aligned nanotopography and spatio-temporal delivery of triiodothyronine and retinoic acid, opening avenues for nerve regenerative graft fabrication.
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Affiliation(s)
- Aishwarya Satish
- Biological Materials Laboratory, CSIR-Central Leather Research Institute, Chennai, India-600 020.
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25
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Babitha S, Korrapati PS. Biodegradable zein–polydopamine polymeric scaffold impregnated with TiO
2
nanoparticles for skin tissue engineering. Biomed Mater 2017; 12:055008. [DOI: 10.1088/1748-605x/aa7d5a] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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26
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Shoba E, Lakra R, Syamala Kiran M, Korrapati PS. Fabrication of core–shell nanofibers for controlled delivery of bromelain and salvianolic acid B for skin regeneration in wound therapeutics. Biomed Mater 2017; 12:035005. [DOI: 10.1088/1748-605x/aa6684] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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27
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Krishnaswamy VR, Balaguru UM, Chatterjee S, Korrapati PS. Dermatopontin augments angiogenesis and modulates the expression of transforming growth factor beta 1 and integrin alpha 3 beta 1 in endothelial cells. Eur J Cell Biol 2017; 96:266-275. [DOI: 10.1016/j.ejcb.2017.02.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 02/28/2017] [Accepted: 02/28/2017] [Indexed: 02/01/2023] Open
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28
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Poornima B, Korrapati PS. Fabrication of chitosan-polycaprolactone composite nanofibrous scaffold for simultaneous delivery of ferulic acid and resveratrol. Carbohydr Polym 2017; 157:1741-1749. [DOI: 10.1016/j.carbpol.2016.11.056] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 11/18/2016] [Accepted: 11/19/2016] [Indexed: 01/06/2023]
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29
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Karthick C, Karthikeyan K, Korrapati PS, Rahiman AK. Antioxidant, DNA interaction, molecular docking and cytotoxicity studies of aminoethylpiperazine-containing macrocyclic binuclear copper(II) complexes. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- C. Karthick
- Post-Graduate and Research Department of Chemistry; The New College (Autonomous); Chennai 600 014 India
| | - K. Karthikeyan
- Biomaterials Division; CSIR-Central Leather Research Institute; Chennai 600 020 India
| | - Purna Sai Korrapati
- Biomaterials Division; CSIR-Central Leather Research Institute; Chennai 600 020 India
| | - A. Kalilur Rahiman
- Post-Graduate and Research Department of Chemistry; The New College (Autonomous); Chennai 600 014 India
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30
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Chereddy NR, Nagaraju P, Niladri Raju M, Krishnaswamy VR, Korrapati PS, Bangal PR, Rao VJ. A novel FRET ‘off–on’ fluorescent probe for the selective detection of Fe 3+ , Al 3+ and Cr 3+ ions: Its ultrafast energy transfer kinetics and application in live cell imaging. Biosens Bioelectron 2015; 68:749-756. [DOI: 10.1016/j.bios.2015.01.074] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Revised: 01/29/2015] [Accepted: 01/31/2015] [Indexed: 01/04/2023]
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31
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Srivatsan KV, Duraipandy N, Begum S, Lakra R, Ramamurthy U, Korrapati PS, Kiran MS. Effect of curcumin caged silver nanoparticle on collagen stabilization for biomedical applications. Int J Biol Macromol 2015; 75:306-15. [PMID: 25661876 DOI: 10.1016/j.ijbiomac.2015.01.050] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [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: 07/22/2014] [Revised: 12/19/2014] [Accepted: 01/16/2015] [Indexed: 02/07/2023]
Abstract
The current study aims at understanding the influence of curcumin caged silver nanoparticle (CCSNP) on stability of collagen. The results indicated that curcumin caged silver nanoparticles efficiently stabilize collagen, indicated by enhanced tensile strength, fibril formation and viscosity. The tensile strength of curcumin caged silver nanoparticle cross-linked collagen and elongation at break was also found to be higher than glutaraldehyde cross-linked collagen. The physicochemical characteristics of curcumin caged nanoparticle cross-linked collagen exhibited enhanced strength. The thermal properties were also good with both thermal degradation temperature and hydrothermal stability higher than native collagen. CD analysis showed no structural disparity in spite of superior physicochemical properties suggesting the significance of curcumin caged nanoparticle mediated cross-linking. The additional enhancement in the stabilization of collagen could be attributed to multiple sites for interaction with collagen molecule provided by curcumin caged silver nanoparticles. The results of cell proliferation and anti-microbial activity assays indicated that curcumin caged silver nanoparticles promoted cell proliferation and inhibited microbial growth making it an excellent biomaterial for wound dressing application. The study opens scope for nano-biotechnological strategies for the development of alternate non-toxic cross-linking agents facilitating multiple site interaction thereby improving therapeutic values to the collagen for biomedical application.
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Affiliation(s)
| | - N Duraipandy
- Council of Scientific and Industrial Research, Central Leather Research Institute, Adyar, Chennai 600020, India; Academy of Scientific and Innovative Research, New Delhi, India
| | | | - Rachita Lakra
- Council of Scientific and Industrial Research, Central Leather Research Institute, Adyar, Chennai 600020, India
| | - Usha Ramamurthy
- Council of Scientific and Industrial Research, Central Leather Research Institute, Adyar, Chennai 600020, India
| | - Purna Sai Korrapati
- Council of Scientific and Industrial Research, Central Leather Research Institute, Adyar, Chennai 600020, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - Manikantan Syamala Kiran
- Council of Scientific and Industrial Research, Central Leather Research Institute, Adyar, Chennai 600020, India; Academy of Scientific and Innovative Research, New Delhi, India.
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Karthikeyan K, Krishnaswamy VR, Lakra R, Kiran MS, Korrapati PS. Fabrication of electrospun zein nanofibers for the sustained delivery of siRNA. J Mater Sci Mater Med 2015; 26:101. [PMID: 25655500 DOI: 10.1007/s10856-015-5439-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 11/29/2014] [Indexed: 06/04/2023]
Abstract
In this study, zein nanofibers based siRNA delivery system has been attempted for the first time. Here, the amphiphilic property of zein and the size advantage of nanofibers have been brought together in developing an ideal delivery system for siRNA. The morphological analysis of the GAPDH-siRNA loaded zein nanofibers revealed the proper encapsulation of the siRNA in the polymeric matrix. The loading efficiency of this delivery system was found to be 58.57±2.4% (w/w). The agarose gel analysis revealed that the zein nanofibers preserved the integrity of siRNA for a longer period even at the room temperature. The in vitro release studies not only depicted the sustaining potential of the zein nanofibers but also ensured the release of sufficient quantity of siRNA required to induce the gene silencing effect. The amphiphilic property of zein supported the cell attachment and thereby facilitated the transfection of siRNA into the cells. qRT-PCR analysis confirmed the potential of the developed system in inducing the desired gene silencing effect. Thus, electrospun zein nanofibers have been successfully employed for the delivery of siRNA which has a great therapeutic potential.
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Affiliation(s)
- K Karthikeyan
- Biomaterials Department, CSIR-Central Leather Research Institute, Adyar, Chennai, 600020, India
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33
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Abstract
Biocompatible zein–TiO2microspheres for tannery effluent management.
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Affiliation(s)
- S. Babitha
- Biomaterials Department
- CSIR – Central Leather Research Institute
- Chennai
- India-600 020
| | - Purna Sai Korrapati
- Biomaterials Department
- CSIR – Central Leather Research Institute
- Chennai
- India-600 020
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34
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Duraipandy N, Lakra R, Vinjimur Srivatsan K, Ramamoorthy U, Korrapati PS, Kiran MS. Plumbagin caged silver nanoparticle stabilized collagen scaffold for wound dressing. J Mater Chem B 2015; 3:1415-1425. [DOI: 10.1039/c4tb01791a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Wound dressing material based on nano-biotechnological intervention by caging plumbagin on silver nanoparticle (PCSN) as a multi-site cross-linking agent of collagen scaffolds with potent anti-microbial and wound healing activity.
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Affiliation(s)
- N. Duraipandy
- Biomaterials Division
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
- Academy of Scientific and Innovative Research
| | - Rachita Lakra
- Biomaterials Division
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
| | | | - Usha Ramamoorthy
- Biomaterials Division
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
| | - Purna Sai Korrapati
- Biomaterials Division
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
- Academy of Scientific and Innovative Research
| | - Manikantan Syamala Kiran
- Biomaterials Division
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
- Academy of Scientific and Innovative Research
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35
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Abstract
Triiodothyronine incorporated nanofibers and its impact on wound healing.
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Affiliation(s)
- Aishwarya Satish
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai
- India-600 020
| | - Purna Sai Korrapati
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai
- India-600 020
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36
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Srivatsan KV, Duraipandy N, Lakra R, K S, Ramamurthy U, Korrapati PS, Kiran MS. Nano-caged shikimate as a multi-site cross-linker of collagen for biomedical applications. RSC Adv 2015. [DOI: 10.1039/c5ra02278a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Shikimic acid caged silver nanoparticles as multi-site cross-linkers of collagen for tissue engineering applications.
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Affiliation(s)
| | - Natarajan Duraipandy
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai
- India
- Academy of Scientific & Innovative Research (AcSIR)
| | - Rachita Lakra
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai
- India
| | - Sandhiya K
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai
- India
| | - Usha Ramamurthy
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai
- India
| | - Purna Sai Korrapati
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai
- India
- Academy of Scientific & Innovative Research (AcSIR)
| | - Manikantan Syamala Kiran
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai
- India
- Academy of Scientific & Innovative Research (AcSIR)
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Karthikeyan K, Sowjanya RS, Yugandhar ADV, Gopinath S, Korrapati PS. Design and development of a topical dosage form for the convenient delivery of electrospun drug loaded nanofibers. RSC Adv 2015. [DOI: 10.1039/c5ra04438c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanofibers dispersed in gel facilitated the convenient administration of drug loaded nanofibers.
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Affiliation(s)
- K. Karthikeyan
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
| | | | - Aditya D. V. Yugandhar
- Department of Pharmaceutics
- Faculty of Pharmacy
- Sri Ramachandra University
- Chennai-600116
- India
| | - S. Gopinath
- Department of Pharmaceutics
- Faculty of Pharmacy
- Sri Ramachandra University
- Chennai-600116
- India
| | - Purna Sai Korrapati
- Biomaterials Department
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
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38
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Karthikeyan K, Vijayalakshmi E, Korrapati PS. Selective interactions of zein microspheres with different class of drugs: an in vitro and in silico analysis. AAPS PharmSciTech 2014; 15:1172-80. [PMID: 24875151 DOI: 10.1208/s12249-014-0151-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 05/07/2014] [Indexed: 11/30/2022] Open
Abstract
In this study, we have evaluated the interactions of zein microspheres with different class of drugs (hydrophobic, hydrophilic, and amphiphilic) using in vitro and in silico analysis. Zein microspheres loaded with aceclofenac, metformin, and promethazine has been developed by solvent evaporation technique and analyzed for its compatibility. The physical characterization depicted the proper encapsulation of hydrophobic drug in the microspheres. The in vitro release study revealed the sustaining ability of the microspheres in the following order: hydrophobic > hydrophilic > amphiphilic. In silico analysis also confirmed the better binding affinity and greater interactions of hydrophobic drug with zein. The above results revealed that zein is more suitable for hydrophobic drugs in the development of sustained drug delivery systems using solvent evaporation technique. The study therefore envisages a scope for identifying the most suitable polymer for a sustained drug delivery system in accordance with the nature of the drug.
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Loordhuswamy AM, Krishnaswamy VR, Korrapati PS, Thinakaran S, Rengaswami GDV. Fabrication of highly aligned fibrous scaffolds for tissue regeneration by centrifugal spinning technology. Mater Sci Eng C Mater Biol Appl 2014; 42:799-807. [PMID: 25063182 DOI: 10.1016/j.msec.2014.06.011] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 05/10/2014] [Accepted: 06/09/2014] [Indexed: 01/08/2023]
Abstract
Centrifugal spinning (C-Spin) is an emerging technology which uses centrifugal force to produce ultrafine fibers. Being a voltage free technique it can overcome the limitations of electrospinning. Owing to the unique characteristic features such as high surface area to volume ratio, porosity, mechanical strength and fiber alignment, centrifugal spun (C-spun) fibrous mat has a wide range of scope in various biomedical applications. Higher degree of fiber alignment can be effortlessly achieved by the C-Spin process. In order to prove the versatility of C-Spin system with respect to fiber alignment, Polycaprolactone (PCL) and gelatin were spun taking them as model polymers. The morphological analysis revealed that highly aligned ultrafine fibers with smooth surface are achieved by C-Spinning. Hydrophilicity, porosity and mechanical property results confirm that the C-spun mat is more suitable for tissue engineering applications. In vitro and in vivo experiments proved that the scaffolds are biocompatible and can be efficiently used as a wound dressing material.
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Affiliation(s)
| | | | - Purna Sai Korrapati
- Department of Biomaterials, CSIR-Central Leather Research Institute, Chennai 600020, India
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40
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Karthick C, Gurumoorthy P, Musthafa MI, Lakra R, Korrapati PS, Rahiman AK. Dinuclear phenoxo-bridged “end-off” complexes containing a piperazine that shows chemical nuclease and cytotoxic activities. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.920501] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- C. Karthick
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), Chennai, India
| | - P. Gurumoorthy
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), Chennai, India
| | - M.A. Imran Musthafa
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), Chennai, India
| | - Rachita Lakra
- Biomaterials Division, CSIR-Central Leather Research Institute, Chennai, India
| | - Purna Sai Korrapati
- Biomaterials Division, CSIR-Central Leather Research Institute, Chennai, India
| | - A. Kalilur Rahiman
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), Chennai, India
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41
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Lakra R, Kiran MS, Usha R, Mohan R, Sundaresan R, Korrapati PS. Enhanced stabilization of collagen by furfural. Int J Biol Macromol 2014; 65:252-7. [DOI: 10.1016/j.ijbiomac.2014.01.040] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 01/13/2014] [Accepted: 01/17/2014] [Indexed: 10/25/2022]
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42
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Abstract
Keloids are a benign dermal proliferative disorder characterised by dense fibrotic tissue developing due to abnormal wound healing.
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Affiliation(s)
| | - Rachita Lakra
- Biomaterials Department
- CSIR – Central Leather Research Institute
- Chennai, India
| | - Purna Sai Korrapati
- Biomaterials Department
- CSIR – Central Leather Research Institute
- Chennai, India
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43
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Abstract
Nanofiber based delivery of enzyme for wound debridement with sustained functional integrity.
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Affiliation(s)
- Ekambaram Shoba
- Biomaterials Department
- CSIR - Central Leather Research Institute
- Chennai, India-600 020
| | - Rachita Lakra
- Biomaterials Department
- CSIR - Central Leather Research Institute
- Chennai, India-600 020
| | | | - Purna Sai Korrapati
- Biomaterials Department
- CSIR - Central Leather Research Institute
- Chennai, India-600 020
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44
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Chereddy NR, Niladri Raju MV, Nagaraju P, Krishnaswamy VR, Korrapati PS, Bangal PR, Rao VJ. A naphthalimide based PET probe with Fe3+ selective detection ability: theoretical and experimental study. Analyst 2014; 139:6352-6. [DOI: 10.1039/c4an01528b] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A naphthalimide based Fe3+ selective fluorescence ‘turn-on’ probe that operates based on a PET mechanism has been synthesized, and its application in the detection of Fe3+ ions in aqueous samples and in live cells is explored.
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Affiliation(s)
- Narendra Reddy Chereddy
- Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007, India
| | - M. V. Niladri Raju
- Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007, India
| | - Peethani Nagaraju
- Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007, India
| | | | - Purna Sai Korrapati
- Biomaterials Division
- CSIR-Central Leather Research Institute
- Chennai-600 020, India
| | - Prakriti Ranjan Bangal
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007, India
| | - Vaidya Jayathirtha Rao
- Crop Protection Chemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007, India
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45
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Chereddy NR, Korrapati PS, Thennarasu S, Mandal AB. Tuning copper(ii) ion selectivity: the role of basicity, size of the chelating ring and orientation of coordinating atoms. Dalton Trans 2013; 42:12873-7. [DOI: 10.1039/c3dt51765a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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46
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Chereddy NR, Janakipriya S, Korrapati PS, Thennarasu S, Mandal AB. Solvent-assisted selective detection of sub-micromolar levels of Cu2+ions in aqueous samples and live-cells. Analyst 2013; 138:1130-6. [DOI: 10.1039/c2an36339a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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47
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Karthikeyan K, Guhathakarta S, Rajaram R, Korrapati PS. Electrospun zein/eudragit nanofibers based dual drug delivery system for the simultaneous delivery of aceclofenac and pantoprazole. Int J Pharm 2012; 438:117-22. [DOI: 10.1016/j.ijpharm.2012.07.075] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 07/18/2012] [Accepted: 07/21/2012] [Indexed: 10/27/2022]
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48
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Karthikeyan K, Lakra R, Rajaram R, Korrapati PS. Development and characterization of zein-based microcarrier system for sustained delivery of aceclofenac sodium. AAPS PharmSciTech 2012; 13:143-9. [PMID: 22167417 PMCID: PMC3299440 DOI: 10.1208/s12249-011-9731-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [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: 06/30/2011] [Accepted: 11/21/2011] [Indexed: 11/30/2022] Open
Abstract
Nonsteroidal anti-inflammatory drugs (NSAIDs) induce gastric injury on long-term usage. This study aims at reducing the side effect of NSAIDs by encapsulating in zein, an acid-resistant biopolymer. Aceclofenac-loaded zein microspheres were prepared by emulsification and solvent evaporation method. The stability of zein microspheres at gastric pH retarded the release of the entrapped drug and hence reduces the possibility of gastric injury. However, the in vitro release of aceclofenac was sustained up to 72 h at intestinal pH. Thus, zein microspheres pave the way for the development of safe and sustained delivery system for NSAIDs thereby achieving the desired therapeutic potential with reduced side effects for chronic inflammatory disorders.
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Affiliation(s)
- K. Karthikeyan
- Biomaterials Division, Central Leather Research Institute, TICEL Biopark, Taramani, Chennai, 600113 India
| | - Rachita Lakra
- Biomaterials Division, Central Leather Research Institute, TICEL Biopark, Taramani, Chennai, 600113 India
| | - Rama Rajaram
- Biomaterials Division, Central Leather Research Institute, TICEL Biopark, Taramani, Chennai, 600113 India
| | - Purna Sai Korrapati
- Biomaterials Division, Central Leather Research Institute, TICEL Biopark, Taramani, Chennai, 600113 India
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49
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Mogili NS, Krishnaswamy VR, Jayaraman M, Rajaram R, Venkatraman A, Korrapati PS. Altered angiogenic balance in keloids: a key to therapeutic intervention. Transl Res 2012; 159:182-9. [PMID: 22340768 DOI: 10.1016/j.trsl.2011.10.002] [Citation(s) in RCA: 32] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 10/05/2011] [Accepted: 10/05/2011] [Indexed: 02/06/2023]
Abstract
Keloids are manifestations of abnormal wound repair with unresolved clinical complications. An effective therapeutic regimen has not been established for keloids, and current strategies are plagued by problems such as recurrence and side effects. Keloids, being a human-specific dermal fibroproliferative disorder are characterized by an excessive accumulation of extracellular matrix (ECM), thickened basement membrane, unregulated expression of matrix metalloproteases, growth factors, and cytokines. The internal milieu in a keloid bears a strong resemblance to a tumor with both exhibiting striking similarities with respect to tissue environment and unregulated vasculature. Abnormal angiogenesis manifested by an imbalance between proangiogenic and antiangiogenic factors has been recognized as a "common denominator" underlying many pathological conditions. However, such an imbalance has not been investigated in keloids. In this study, the angiogenic imbalance in keloids was explored with reference to circulating and tissue level expression of vascular endothelial growth factor (VEGF) and endostatin/collagen XVIII. It was observed that VEGF levels were upregulated and endostatin levels were downregulated in keloid patients in comparison to normal controls in both sera and tissue. Hence, antiangiogenic therapeutics based on endostatin in combination with current curative strategies as in tumors would present a scope for the effective management of keloids.
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Affiliation(s)
- Nirupa Shyam Mogili
- Biomaterials Division, Central Leather Research Institute, TICEL Biopark, CSIR Road, Taramani, Chennai, Tamil Nadu, India
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