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Spinner J, Perumal G, Mallory G, Melicoff-Portillo E, Heinle J. Think Inside The Box: Constrictive Pericarditis after Pediatric Lung Transplant. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1425] [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: 04/05/2023] Open
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2
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Perumal G, Pappuru S, Doble M, Chakraborty D, Shajahan S, Abu Haija M. Controlled Synthesis of Dendrite-like Polyglycerols Using Aluminum Complex for Biomedical Applications. ACS Omega 2023; 8:2377-2388. [PMID: 36687077 PMCID: PMC9851026 DOI: 10.1021/acsomega.2c06761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
This work describes a one-pot synthesis of dendrite-like hyperbranched polyglycerols (HPGs) via a ring-opening multibranching polymerization (ROMBP) process using a bis(5,7-dichloro-2-methyl-8-quinolinolato)methyl aluminum complex (1) as a catalyst and 1,1,1-tris(hydroxymethyl)propane/trimethylol propane (TMP) as an initiator. Single-crystal X-ray diffraction (XRD) analysis was used to elucidate the molecular structure of complex 1. Inverse-gated (IG)13C NMR analysis of HPGs showed degree of branching between 0.50 and 0.57. Gel permeation chromatography (GPC) analysis of the HPG polymers provided low, medium, and high-molecular weight (M n) polymers ranging from 14 to 73 kDa and molecular weight distributions (M w/M n) between 1.16 and 1.35. The obtained HPGs exhibited high wettability with water contact angle between 18 and 21° and T g ranging between -39 and -55 °C. Notably, ancillary ligand-supported aluminum complexes as catalysts for HPG polymerization reactions have not been reported to date. The obtained HPG polymers in the presence of the aluminum complex (1) can be used for various biomedical applications. Here, nanocomposite electrospun fibers were fabricated with synthesized HPG polymer. The nanofibers were subjected to cell culture experiments to evaluate cytocompatibility behavior with L929 and MG63 cells. The cytocompatibility studies of HPG polymer and nanocomposite scaffold showed high cell viability and spreading. The study results concluded, synthesized HPG polymers and composite nanofibers can be used for various biomedical applications.
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Affiliation(s)
- Govindaraj Perumal
- Department
of Conservative Dentistry and Endodontics, Saveetha Dental College & Hospital, Saveetha Institute of Medical
and Technical Sciences (SIMATS), Chennai600 077, India
| | - Sreenath Pappuru
- Faculty
of Chemical Engineering and the Grand Technion Energy Program, Technion-Israel Institute of Technology, Haifa320003, Israel
| | - Mukesh Doble
- Department
of Conservative Dentistry and Endodontics, Saveetha Dental College & Hospital, Saveetha Institute of Medical
and Technical Sciences (SIMATS), Chennai600 077, India
| | - Debashis Chakraborty
- Department
of Chemistry, Indian Institute of Technology
Madras, Chennai600 036, India
| | - Shanavas Shajahan
- Department
of Chemistry, Khalifa University of Science
and Technology, Abu Dhabi127788, United
Arab Emirates
| | - Mohammad Abu Haija
- Center
for Catalysis and Separations, Khalifa University
of Science and Technology, Abu Dhabi127788, United Arab Emirates
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3
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Masanam HB, Perumal G, Krishnan S, Singh SK, Jha NK, Chellappan DK, Dua K, Gupta PK, Narasimhan AK. Advances and opportunities in nanoimaging agents for the diagnosis of inflammatory lung diseases. Nanomedicine (Lond) 2022; 17:1981-2005. [PMID: 36695290 DOI: 10.2217/nnm-2021-0427] [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] [Indexed: 01/26/2023] Open
Abstract
The development of rapid, noninvasive diagnostics to detect lung diseases is a great need after the COVID-2019 outbreak. The nanotechnology-based approach has improved imaging and facilitates the early diagnosis of inflammatory lung diseases. The multifunctional properties of nanoprobes enable better spatial-temporal resolution and a high signal-to-noise ratio in imaging. Targeted nanoimaging agents have been used to bind specific tissues in inflammatory lungs for early-stage diagnosis. However, nanobased imaging approaches for inflammatory lung diseases are still in their infancy. This review provides a solution-focused approach to exploring medical imaging technologies and nanoprobes for the detection of inflammatory lung diseases. Prospects for the development of contrast agents for lung disease detection are also discussed.
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Affiliation(s)
- Hema Brindha Masanam
- Advanced Nano-Theranostics (ANTs), Biomaterials Lab, Department of Biomedical Engineering, SRM Institute of Science & Technology, Kattankulathur, Tamil Nadu, 603 203, India
| | - Govindaraj Perumal
- Department of Conservative Dentistry & Endodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Velappanchavadi, Chennai, 600 077, India.,Department of Biomedical Engineering, Rajalakshmi Engineering College, Thandalam, Chennai, 602 105, India
| | | | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
| | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering & Technology (SET), Sharda University, Knowledge Park III, Greater Noida, Uttar Pradesh, 201310, India
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, School of Pharmacy, International Medical University (IMU), Bukit Jalil, Kuala Lumpur, 57000, Malaysia
| | - Kamal Dua
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, NSW 2007, Australia
| | - Piyush Kumar Gupta
- Department of Life Sciences, School of Basic Sciences & Research (SBSR), Sharda University, Knowledge Park III, Greater Noida, Uttar Pradesh, 201310, India.,Department of Biotechnology, Graphic Era Deemed to be University, Dehradun, Uttarakhand, 248002, India.,Faculty of Health and Life Sciences, INTI International University, Nilai 71800, Malaysia
| | - Ashwin Kumar Narasimhan
- Advanced Nano-Theranostics (ANTs), Biomaterials Lab, Department of Biomedical Engineering, SRM Institute of Science & Technology, Kattankulathur, Tamil Nadu, 603 203, India
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Vázquez-Aristizabal P, Perumal G, García-Astrain C, Liz-Marzán LM, Izeta A. Trends in Tissue Bioprinting, Cell-Laden Bioink Formulation, and Cell Tracking. ACS Omega 2022; 7:16236-16243. [PMID: 35601337 PMCID: PMC9118380 DOI: 10.1021/acsomega.2c01398] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 04/13/2022] [Indexed: 06/15/2023]
Abstract
Use of three-dimensional bioprinting for the in vitro engineering of tissues has boomed during the past five years. An increasing number of commercial bioinks are available, with suitable mechanical and rheological characteristics and excellent biocompatibility. However, cell-laden bioinks based on a single polymer do not properly mimic the complex extracellular environment needed to tune cell behavior, as required for tissue and organ formation. Processes such as cell aggregation, migration, and tissue patterning should be dynamically monitored, and progress is being made in these areas, most prominently derived from nanoscience. We review recent developments in tissue bioprinting, cellularized bioink formulation, and cell tracking, from both chemistry and cell biology perspectives. We conclude that an interdisciplinary approach including expertise in polymer science, nanoscience, and cell biology/tissue engineering is required to drive further advancements in this field toward clinical application.
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Affiliation(s)
- Paula Vázquez-Aristizabal
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Tissue
Engineering Group, Biodonostia Health Research
Institute, 20014 Donostia-San, Sebastián, Spain
| | - Govindaraj Perumal
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Department
of Biomedical Engineering, Rajalakshmi Engineering
College, 602 105 Chennai, India
| | - Clara García-Astrain
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Centro
de Investigación Biomédica en Red, Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 20014 Donostia-San, Sebastián, Spain
| | - Luis M. Liz-Marzán
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Centro
de Investigación Biomédica en Red, Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 20014 Donostia-San, Sebastián, Spain
- Ikerbasque, Basque Foundation
for Science, 43009 Bilbao, Spain
| | - Ander Izeta
- Tissue
Engineering Group, Biodonostia Health Research
Institute, 20014 Donostia-San, Sebastián, Spain
- Tecnun-University
of Navarra, 20009 Donostia-San, Sebastián, Spain
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5
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Plou J, Molina-Martínez B, García-Astrain C, Langer J, García I, Ercilla A, Perumal G, Carracedo A, Liz-Marzán LM. Nanocomposite Scaffolds for Monitoring of Drug Diffusion in Three-Dimensional Cell Environments by Surface-Enhanced Raman Spectroscopy. Nano Lett 2021; 21:8785-8793. [PMID: 34614348 PMCID: PMC8554797 DOI: 10.1021/acs.nanolett.1c03070] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Monitoring dynamic processes in complex cellular environments requires the integration of uniformly distributed detectors within such three-dimensional (3D) networks, to an extent that the sensor could provide real-time information on nearby perturbations in a non-invasive manner. In this context, the development of 3D-printed structures that can function as both sensors and cell culture platforms emerges as a promising strategy, not only for mimicking a specific cell niche but also toward identifying its characteristic physicochemical conditions, such as concentration gradients. We present herein a 3D cancer model that incorporates a hydrogel-based scaffold containing gold nanorods. In addition to sustaining cell growth, the printed nanocomposite inks display the ability to uncover drug diffusion profiles by surface-enhanced Raman scattering, with high spatiotemporal resolution. We additionally demonstrate that the acquired information could pave the way to designing novel strategies for drug discovery in cancer therapy, through correlation of drug diffusion with cell death.
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Affiliation(s)
- Javier Plou
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Biomedical
Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine
(CIBER-BBN), 20014 Donostia-San Sebastián, Spain
- CIC
bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain
| | - Beatriz Molina-Martínez
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
| | - Clara García-Astrain
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Biomedical
Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine
(CIBER-BBN), 20014 Donostia-San Sebastián, Spain
| | - Judith Langer
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Biomedical
Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine
(CIBER-BBN), 20014 Donostia-San Sebastián, Spain
| | - Isabel García
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Biomedical
Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine
(CIBER-BBN), 20014 Donostia-San Sebastián, Spain
| | - Amaia Ercilla
- CIC
bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain
- Biomedical
Research Networking Center in Cancer (CIBERONC), 48160 Derio, Spain
| | - Govindaraj Perumal
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
| | - Arkaitz Carracedo
- CIC
bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain
- Biomedical
Research Networking Center in Cancer (CIBERONC), 48160 Derio, Spain
- IKERBASQUE,
Basque Foundation for Science, 48009 Bilbao, Spain
- Biochemistry
and Molecular Biology Department, University
of the Basque Country (UPV/EHU), P.O.
Box 644, E-48080 Bilbao, Spain
| | - Luis M. Liz-Marzán
- CIC
biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San
Sebastián, Spain
- Biomedical
Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine
(CIBER-BBN), 20014 Donostia-San Sebastián, Spain
- IKERBASQUE,
Basque Foundation for Science, 48009 Bilbao, Spain
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Calizo RC, Bell MK, Ron A, Hu M, Bhattacharya S, Wong NJ, Janssen WGM, Perumal G, Pederson P, Scarlata S, Hone J, Azeloglu EU, Rangamani P, Iyengar R. Cell shape regulates subcellular organelle location to control early Ca 2+ signal dynamics in vascular smooth muscle cells. Sci Rep 2020; 10:17866. [PMID: 33082406 PMCID: PMC7576209 DOI: 10.1038/s41598-020-74700-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 10/05/2020] [Indexed: 12/23/2022] Open
Abstract
The shape of the cell is connected to its function; however, we do not fully understand underlying mechanisms by which global shape regulates a cell's functional capabilities. Using theory, experiments and simulation, we investigated how physiologically relevant cell shape changes affect subcellular organization, and consequently intracellular signaling, to control information flow needed for phenotypic function. Vascular smooth muscle cells going from a proliferative and motile circular shape to a contractile fusiform shape show changes in the location of the sarcoplasmic reticulum, inter-organelle distances, and differential distribution of receptors in the plasma membrane. These factors together lead to the modulation of signals transduced by the M3 muscarinic receptor/Gq/PLCβ pathway at the plasma membrane, amplifying Ca2+ dynamics in the cytoplasm, and the nucleus resulting in phenotypic changes, as determined by increased activity of myosin light chain kinase in the cytoplasm and enhanced nuclear localization of the transcription factor NFAT. Taken together, our observations show a systems level phenomenon whereby global cell shape affects subcellular organization to modulate signaling that enables phenotypic changes.
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Affiliation(s)
- R C Calizo
- Department of Pharmacological Sciences, Institute for Systems Biomedicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1215, New York, NY, 10029, USA
| | - M K Bell
- Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - A Ron
- Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA
| | - M Hu
- Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA
| | - S Bhattacharya
- Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - N J Wong
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - W G M Janssen
- Department of Pharmacological Sciences, Institute for Systems Biomedicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1215, New York, NY, 10029, USA
| | - G Perumal
- Carl Zeiss Microscopy LLC, White Plains, NY, 10601, USA
| | - P Pederson
- Carl Zeiss Microscopy LLC, White Plains, NY, 10601, USA
| | - S Scarlata
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA, 01609, USA
| | - J Hone
- Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA
| | - E U Azeloglu
- Department of Pharmacological Sciences, Institute for Systems Biomedicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1215, New York, NY, 10029, USA
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - P Rangamani
- Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA, 92093, USA.
| | - R Iyengar
- Department of Pharmacological Sciences, Institute for Systems Biomedicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1215, New York, NY, 10029, USA.
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Sellappan LK, Anandhavelu S, Doble M, Perumal G, Jeon JH, Vikraman D, Kim HS. Biopolymer film fabrication for skin mimetic tissue regenerative wound dressing applications. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1817019] [Citation(s) in RCA: 4] [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: 10/23/2022]
Affiliation(s)
- Logesh Kumar Sellappan
- Department of Biomedical Engineering, Dr. N. G. P. Institute of Technology, Coimbatore, Tamil Nadu, India
| | - Sanmugam Anandhavelu
- Department of Chemistry, Vel Tech Multi Tech Engineering College, Chennai, Tamil Nadu, India
| | - Mukesh Doble
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India
| | - Govindaraj Perumal
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India
| | - Ji-Hoon Jeon
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul, Republic of Korea
| | - Dhanasekaran Vikraman
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul, Republic of Korea
| | - Hyun-Seok Kim
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul, Republic of Korea
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8
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Perumal G, Grewal HS, Arora HS. Enhanced durability, bio-activity and corrosion resistance of stainless steel through severe surface deformation. Colloids Surf B Biointerfaces 2020; 194:111197. [PMID: 32569888 DOI: 10.1016/j.colsurfb.2020.111197] [Citation(s) in RCA: 5] [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: 05/27/2020] [Revised: 06/11/2020] [Accepted: 06/13/2020] [Indexed: 11/27/2022]
Abstract
Owing to its good biocompatibility and low cost, stainless steel is one of the most widely utilized biomaterial. However, longtime assessment of stainless steel has shown problems related to material degradation, especially localized corrosion and bio-film formation. In addition, the leaching of toxic nickel and chromium ions from stainless steel leads to additional health complications. Here, we utilized submerged friction stir processing, a severe surface deformation technique for significantly enhancing its durability, bio-activity as well as antibacterial resistance. The processing was done with a wide variation in strain rates to produce tunable surface microstructure. High strain-rate processing resulted in nearly single-phase fine-grained microstructure, while slow strain-rate processing developed a dual-phase fine-grained microstructure. The bio-corrosion rate of processed steel was reduced by more than 60 % along with significant enhancement in the pitting resistance. The processed steel showed nearly no bacterial adhesion/biofilm formation, evaluated using S. aureus and E. coli bacterial strains. Further, the processed stainless steel surface demonstrated minimum leaching of the toxic elements, significantly enhancing its appeal for bio-implant applications. The observed behavior was explained based on the formation of a stable passive layer, rich in Cr2O3, as determined using x-ray photoelectron microscopy (XPS) and increased hydrophilicity.
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Affiliation(s)
- G Perumal
- Department of Mechanical Engineering, School of Engineering, Shiv Nadar University, Uttar Pradesh, 201314, India
| | - H S Grewal
- Department of Mechanical Engineering, School of Engineering, Shiv Nadar University, Uttar Pradesh, 201314, India
| | - H S Arora
- Department of Mechanical Engineering, School of Engineering, Shiv Nadar University, Uttar Pradesh, 201314, India.
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9
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Perumal G, Ramasamy B, Nandkumar A M, Dhanasekaran S, Ramasamy S, Doble M. Bilayer nanostructure coated AZ31 magnesium alloy implants: in vivo reconstruction of critical-sized rabbit femoral segmental bone defect. Nanomedicine 2020; 29:102232. [PMID: 32562860 DOI: 10.1016/j.nano.2020.102232] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 05/26/2020] [Accepted: 05/26/2020] [Indexed: 12/15/2022]
Abstract
Healing or reconstruction of critical-sized bone defects is still challenging in orthopaedic practice. In this study, we developed a new approach to control the degradation and improve the bone regeneration of the AZ31 magnesium substrate, fabricated as mesh cage implants. Subsequently, bilayer nanocomposite coating was carried out using polycaprolactone (PCL) and nano-hydroxyapatite (nHA) by dip-coating and electrospinning. Lastly, the healing capacity of the implants was studied in New Zealand White (NZW) rabbit critical-sized femur bone defects. X-ray analysis showed the coated implant group bridged and healed the critical defects 100% during four weeks of post-implantation. Micro-computed tomography (Micro-CT) study showed higher total bone volume (21.10%), trabecular thickness (0.73), and total porosity (85.71%) with bilayer coated implants than uncoated. Our results showed that nanocomposite coated implants controlled the in vivo degradation and improved bioactivity. Hence, the coated implants can be used as a promising bioresorbable implant for critical segmental bone defect repair applications.
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Affiliation(s)
- Govindaraj Perumal
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, India
| | - Boopalan Ramasamy
- Department of Orthopaedics/Centre for Stem Cell Research, Christian Medical College, Vellore, India; Department of Orthopaedics, Royal Darwin Hospital, Tiwi, Australia
| | - Maya Nandkumar A
- Division of Microbial Technology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, India
| | - Sivaraman Dhanasekaran
- Centre for Laboratory Animal Technology and Research, Sathyabama Institute of Science and Technology, Chennai, India
| | | | - Mukesh Doble
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, India.
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Perumal G, Sivakumar PM, Nandkumar AM, Doble M. Synthesis of magnesium phosphate nanoflakes and its PCL composite electrospun nanofiber scaffolds for bone tissue regeneration. Materials Science and Engineering: C 2020; 109:110527. [DOI: 10.1016/j.msec.2019.110527] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 11/03/2019] [Accepted: 12/05/2019] [Indexed: 01/13/2023]
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Malek A, Bera K, Biswas S, Perumal G, Das AK, Doble M, Thomas T, Prasad E. Development of a Next-Generation Fluorescent Turn-On Sensor to Simultaneously Detect and Detoxify Mercury in Living Samples. Anal Chem 2019; 91:3533-3538. [DOI: 10.1021/acs.analchem.8b05268] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Abdul Malek
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Kallol Bera
- Chemical Sciences Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India
| | - Shrutidhara Biswas
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Govindaraj Perumal
- Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, India
| | - Anand Kant Das
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India
| | - Mukesh Doble
- Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, India
| | - Tiju Thomas
- Department of Metallurgical and Materials Engineering, Institute of Technology Madras, Chennai 600036, India
| | - Edamana Prasad
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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12
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Sudarshan K, Perumal G, Aidhen IS, Doble M. Synthesis of Unsymmetrical Linear Diarylheptanoids and their Enantiomers and Antiproliferative Activity Studies. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801211] [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: 11/10/2022]
Affiliation(s)
- Kasireddy Sudarshan
- Department of Chemistry; Indian Institute of Technology; 600036 Madras, Chennai India
| | - Govindaraj Perumal
- Department of Biotechnology; Indian Institute of Technology; 600036 Bhupat and Jyoti Mehta School of Biosciences India
| | - Indrapal Singh Aidhen
- Department of Chemistry; Indian Institute of Technology; 600036 Madras, Chennai India
| | - Mukesh Doble
- Department of Biotechnology; Indian Institute of Technology; 600036 Bhupat and Jyoti Mehta School of Biosciences India
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13
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Perumal G, Ramasamy B, A MN, Doble M. Nanostructure coated AZ31 magnesium cylindrical mesh cage for potential long bone segmental defect repair applications. Colloids Surf B Biointerfaces 2018; 172:690-698. [PMID: 30243223 DOI: 10.1016/j.colsurfb.2018.09.010] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 08/30/2018] [Accepted: 09/04/2018] [Indexed: 12/20/2022]
Abstract
This current study is aimed towards the fabrication of AZ31 magnesium cylindrical mesh cage implant with circular holes for orthopedic applications. This mesh cage is coated with nanocomposite material containing polycaprolactone (PCL), pluronic F127 and nano hydroxyapatite (nHA) by electrospinning process. Morphology and composition were analyzed by various characterization techniques. Controlled degradation and weight loss of the nanocomposite coated samples in 28 days were observed when compared with uncoated samples in SBF (simulated body fluid). The nanocomposite coated material was not cytotoxic to MG63 osteosarcoma cells. The cell viability, morphology, ALP activity, calcium mineralization and collagen deposition were also better on this when compared to uncoated. Smooth and randomly deposited nanofibers on the mesh cage was observed and the contact angle indicated that the surface is hydrophilic with (initial contact angle of 55 ± 1° and after 10 s 0°) when compared to PCL (99°) coated surface. 2-5 fold higher mRNA expression levels of osteogenic genes namely ALP, BMP2, COL1 and RUNX2 was observed with nanocomposite coated scaffolds than uncoated and PCL coated samples in 14 days. These results indicate the potential use of the nanocomposite coated AZ31 cylindrical mesh cage for segmental bone defect repair and can be used as a degradable implant for orthopedic applications.
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Affiliation(s)
- Govindaraj Perumal
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - Boopalan Ramasamy
- Department of Orthopedics, Centre for Stem Cell Research, Christian Medical College, Vellore, 632004, India
| | - Maya Nandkumar A
- Division of Microbial Technology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695012, India
| | - Mukesh Doble
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, 600 036, India.
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Marathe S, Perumal G, Wildschut J, Mattke A, Morwood J, Venugopal P, Alphonso N. Use of Temporary Epicardial Pacing Wires After Congenital Heart Surgery: Necessity or Luxury? Heart Lung Circ 2018. [DOI: 10.1016/j.hlc.2018.06.758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Perumal G, Ayyagari A, Chakrabarti A, Kannan D, Pati S, Grewal HS, Mukherjee S, Singh S, Arora HS. Friction Stir Processing of Stainless Steel for Ascertaining Its Superlative Performance in Bioimplant Applications. ACS Appl Mater Interfaces 2017; 9:36615-36631. [PMID: 28972737 DOI: 10.1021/acsami.7b11064] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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
Substrate-cell interactions for a bioimplant are driven by substrate's surface characteristics. In addition, the performance of an implant and resistance to degradation are primarily governed by its surface properties. A bioimplant typically degrades by wear and corrosion in the physiological environment, resulting in metallosis. Surface engineering strategies for limiting degradation of implants and enhancing their performance may reduce or eliminate the need for implant removal surgeries and the associated cost. In the current study, we tailored the surface properties of stainless steel using submerged friction stir processing (FSP), a severe plastic deformation technique. FSP resulted in significant microstructural refinement from 22 μm grain size for the as-received alloy to 0.8 μm grain size for the processed sample with increase in hardness by nearly 1.5 times. The wear and corrosion behavior of the processed alloy was evaluated in simulated body fluid. The processed sample demonstrated remarkable improvement in both wear and corrosion resistance, which is explained by surface strengthening and formation of a highly stable passive layer. The methylthiazol tetrazolium assay demonstrated that the processed sample is better in supporting cell attachment, proliferation with minimal toxicity, and hemolysis. The athrombogenic characteristic of the as-received and processed samples was evaluated by fibrinogen adsorption and platelet adhesion via the enzyme-linked immunosorbent assay and lactate dehydrogenase assay, respectively. The processed sample showed less platelet and fibrinogen adhesion compared with the as-received alloy, signifying its high thromboresistance. The current study suggests friction stir processing to be a versatile toolbox for enhancing the performance and reliability of currently used bioimplant materials.
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Affiliation(s)
| | - A Ayyagari
- Department of Materials Science and Engineering, University of North Texas , Denton, Texas 76203, United States
| | | | | | | | | | - S Mukherjee
- Department of Materials Science and Engineering, University of North Texas , Denton, Texas 76203, United States
| | - S Singh
- Special Center for Molecular Medicine, Jawaharlal Nehru University , New Delhi 110067, India
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Hanas T, Sampath Kumar TS, Perumal G, Doble M. Tailoring degradation of AZ31 alloy by surface pre-treatment and electrospun PCL fibrous coating. Mater Sci Eng C Mater Biol Appl 2016; 65:43-50. [PMID: 27157726 DOI: 10.1016/j.msec.2016.04.017] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 02/23/2016] [Accepted: 04/06/2016] [Indexed: 11/17/2022]
Abstract
AZ31 magnesium alloy was coated with polycaprolactone (PCL) nano-fibrous layer using electrospinning technique so as to control degradation in physiological environment. Before coating, the alloy was treated with HNO3 to have good adhesion between the coating and substrate. To elucidate the role of pre-treatment and coating, samples only with PCL coating as well as HNO3 treatment only were prepared for comparison. Best coating adhesion of 4B grade by ASTM D3359-09 tape test was observed for pre-treated samples. The effect of coating on in vitro degradation and biomineralization was studied using supersaturated simulated body fluid (SBF 5×). The weight loss and corrosion results obtained by immersion test showed that the combination of HNO3 pre-treatment and PCL coating is very effective in controlling the degradation rate and improving bioactivity. Cytotoxicity studies using L6 cells showed that PCL coated sample has better cell adhesion and proliferation compared to uncoated samples. Nano-fibrous PCL coating combined with prior acid treatment seems to be a promising method to tailor degradation rate with enhanced bioactivity of Mg alloys.
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Affiliation(s)
- T Hanas
- Medical Materials Laboratory, Indian Institute of Technology Madras, Chennai 600036, India; School of Nano Science and Technology, National Institute of Technology Calicut, Calicut, Kerala 673601, India
| | - T S Sampath Kumar
- Medical Materials Laboratory, Indian Institute of Technology Madras, Chennai 600036, India.
| | - Govindaraj Perumal
- Department of Biotechnology - Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
| | - Mukesh Doble
- Department of Biotechnology - Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
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Abstract
Biofilms are structured groups of different bacterial species that are responsible for most chronic and recurrent infections. Biofilm-related infections reoccur in approximately 65–80% of cases. Bacteria associated with the biofilm are highly resistant to antibiotics. Knowledge of biofilm formation, its propagation and the resistance associated with it is scant and a multidisciplinary approach is followed to understand the science and develop strategies to address this problem. This article discusses the role of various biochemical factors, molecular mechanisms and altered host environment causes associated with bacterial resistance in biofilm. It also reveals the target sites and different multidisciplinary strategies adapted for destroying or preventing the formation of biofilms.
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Affiliation(s)
- Nandakumar Venkatesan
- Bhupat & Jyoti Mehta School of Biosciences, Department of Biotechnology, IIT Madras, Chennai, India
| | - Govindaraj Perumal
- Bhupat & Jyoti Mehta School of Biosciences, Department of Biotechnology, IIT Madras, Chennai, India
| | - Mukesh Doble
- Bhupat & Jyoti Mehta School of Biosciences, Department of Biotechnology, IIT Madras, Chennai, India
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Perumal G, Chandra RS, Prabu P, Indhumathi N, Tarigopula A, Mani R. Cytogenetic and interphase Fluorescence in Situ Hybridization studies in patients with multiple myeloma. Mol Cytogenet 2014. [PMCID: PMC4044641 DOI: 10.1186/1755-8166-7-s1-p20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- G Perumal
- Department of Molecular Biology and Cytogenetics, Apollo Hospitals, No. 21, Greams Lane, Off. Greams Road, Chennai-600 006, Tamilnadu, India
| | - RS Chandra
- Department of Genetics, Dr. ALM PG. Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai - 600113, Tamilnadu, India
| | - P Prabu
- Department of Molecular Biology and Cytogenetics, Apollo Hospitals, No. 21, Greams Lane, Off. Greams Road, Chennai-600 006, Tamilnadu, India
| | - N Indhumathi
- Department of Molecular Biology and Cytogenetics, Apollo Hospitals, No. 21, Greams Lane, Off. Greams Road, Chennai-600 006, Tamilnadu, India
| | - Anil Tarigopula
- Department of Molecular Biology and Cytogenetics, Apollo Hospitals, No. 21, Greams Lane, Off. Greams Road, Chennai-600 006, Tamilnadu, India
| | - Rama Mani
- Department of Molecular Biology and Cytogenetics, Apollo Hospitals, No. 21, Greams Lane, Off. Greams Road, Chennai-600 006, Tamilnadu, India
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Natarajan D, Britto SJ, Srinivasan K, Nagamurugan N, Mohanasundari C, Perumal G. Anti-bacterial activity of Euphorbia fusiformis--a rare medicinal herb. J Ethnopharmacol 2005; 102:123-6. [PMID: 16159702 DOI: 10.1016/j.jep.2005.04.023] [Citation(s) in RCA: 39] [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: 04/11/2004] [Revised: 04/23/2005] [Accepted: 04/29/2005] [Indexed: 05/04/2023]
Abstract
Euphorbia fusiformis Buch.-Ham. ex. D.Don (Euphorbiaceae) is a rare medicinal herb. Aqueous and organic solvent extracts of the leaves and rootstocks were investigated for anti-bacterial properties by using disc diffusion and well-in agar methods, against pathogenic strains of Gram positive (Bacillus subtilis and Staphylococcus aureus) and Gram negative bacteria (Escherichia coli, Klebsiella pneumoniae, Proteus vulgaris, Pseudomonas aeruginosa, Salmonella typhii A and Salmonella typhii B). The different extracts differed significantly in their anti-bacterial properties with the methanolic extract being very effective followed by acetone and chloroform extracts. Aqueous and ethanolic extract showed very least activity. The result highlights that rootstock extracts had good anti-bacterial properties than leaf extracts. The results of this study support the use of this plant in traditional medicine to treat fever, wound infections and intestinal disorders.
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Affiliation(s)
- D Natarajan
- Rapinat Herbarium, St. Joseph's College (Autonomous), Tiruchirappalli 620002, Tamil Nadu, India
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Book RG, Perumal G. Sexual asphyxia: a lesser epidemic. Med Law 1993; 12:687-698. [PMID: 8183077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Asphyxiophilia is a paraphilia of the sacrificial/expiatory type in which sexual arousal and the attainment of gratification depend on hypoxia induced through either strangulation, smothering, chest compression and/or the inhalation of volatile substances. A peculiar, auto-erotic variant of this perversion is described, one in which the participant accidently died. Numerous female prostitutes have been canvassed in order to ascertain the prevalence in Durban, Republic of South Africa. The figures are an order of magnitude higher than was hitherto imagined. Insurance companies have been loathe to compensate the beneficiaries of such victims fully. How they and the courts view pivotal concepts such as 'mental infirmity', 'accident', 'natural consequences', and the legitimacy of psychiatry presenting itself as a unified body of knowledge sets precedents, and sets in motion processes whereby these decisions permeate into the general population and become--in time--accepted as norms. Thus, the medicolegal ramifications of sexual asphyxia affect not only the police and the courts, but also our society in general.
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Affiliation(s)
- R G Book
- Department of Forensic Medicine, University of Natal, Durban, South Africa
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