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Tropp J, Collins CP, Xie X, Daso RE, Mehta AS, Patel SP, Reddy MM, Levin SE, Sun C, Rivnay J. Conducting Polymer Nanoparticles with Intrinsic Aqueous Dispersibility for Conductive Hydrogels. Adv Mater 2024; 36:e2306691. [PMID: 37680065 DOI: 10.1002/adma.202306691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/16/2023] [Indexed: 09/09/2023]
Abstract
Conductive hydrogels are promising materials with mixed ionic-electronic conduction to interface living tissue (ionic signal transmission) with medical devices (electronic signal transmission). The hydrogel form factor also uniquely bridges the wet/soft biological environment with the dry/hard environment of electronics. The synthesis of hydrogels for bioelectronics requires scalable, biocompatible fillers with high electronic conductivity and compatibility with common aqueous hydrogel formulations/resins. Despite significant advances in the processing of carbon nanomaterials, fillers that satisfy all these requirements are lacking. Herein, intrinsically dispersible acid-crystalized PEDOT:PSS nanoparticles (ncrys-PEDOTX ) are reported which are processed through a facile and scalable nonsolvent induced phase separation method from commercial PEDOT:PSS without complex instrumentation. The particles feature conductivities of up to 410 S cm-1 , and when compared to other common conductive fillers, display remarkable dispersibility, enabling homogeneous incorporation at relatively high loadings within diverse aqueous biomaterial solutions without additives or surfactants. The aqueous dispersibility of the ncrys-PEDOTX particles also allows simple incorporation into resins designed for microstereolithography without sonication or surfactant optimization; complex biomedical structures with fine features (< 150 µm) are printed with up to 10% particle loading . The ncrys-PEDOTX particles overcome the challenges of traditional conductive fillers, providing a scalable, biocompatible, plug-and-play platform for soft organic bioelectronic materials.
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Affiliation(s)
- Joshua Tropp
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Caralyn P Collins
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Xinran Xie
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Rachel E Daso
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Abijeet Singh Mehta
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Shiv P Patel
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Manideep M Reddy
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Sophia E Levin
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Cheng Sun
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Jonathan Rivnay
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
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Lee I, Surendran A, Fleury S, Gimino I, Curtiss A, Fell C, Shiwarski DJ, Refy O, Rothrock B, Jo S, Schwartzkopff T, Mehta AS, Wang Y, Sipe A, John S, Ji X, Nikiforidis G, Feinberg AW, Hester J, Weber DJ, Veiseh O, Rivnay J, Cohen-Karni T. Electrocatalytic on-site oxygenation for transplanted cell-based-therapies. Nat Commun 2023; 14:7019. [PMID: 37945597 PMCID: PMC10636048 DOI: 10.1038/s41467-023-42697-2] [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: 06/27/2023] [Accepted: 10/19/2023] [Indexed: 11/12/2023] Open
Abstract
Implantable cell therapies and tissue transplants require sufficient oxygen supply to function and are limited by a delay or lack of vascularization from the transplant host. Previous exogenous oxygenation strategies have been bulky and had limited oxygen production or regulation. Here, we show an electrocatalytic approach that enables bioelectronic control of oxygen generation in complex cellular environments to sustain engineered cell viability and therapy under hypoxic stress and at high cell densities. We find that nanostructured sputtered iridium oxide serves as an ideal catalyst for oxygen evolution reaction at neutral pH. We demonstrate that this approach exhibits a lower oxygenation onset and selective oxygen production without evolution of toxic byproducts. We show that this electrocatalytic on site oxygenator can sustain high cell loadings (>60k cells/mm3) in hypoxic conditions in vitro and in vivo. Our results showcase that exogenous oxygen production devices can be readily integrated into bioelectronic platforms, enabling high cell loadings in smaller devices with broad applicability.
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Affiliation(s)
- Inkyu Lee
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Abhijith Surendran
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Samantha Fleury
- Department of Bioengineering, Rice University, Houston, TX, USA
| | - Ian Gimino
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Alexander Curtiss
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA
| | - Cody Fell
- Department of Bioengineering, Rice University, Houston, TX, USA
| | - Daniel J Shiwarski
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Omar Refy
- Department of Physics, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Blaine Rothrock
- Department of Computer Science, Northwestern University, Evanston, IL, USA
| | - Seonghan Jo
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Tim Schwartzkopff
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Abijeet Singh Mehta
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Yingqiao Wang
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Adam Sipe
- Department of Material Science and Engineering, The Pennsylvania State University, State College, PA, USA
| | - Sharon John
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Xudong Ji
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
- Simpson Querrey Institute, Northwestern University, Chicago, IL, USA
| | - Georgios Nikiforidis
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Adam W Feinberg
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Josiah Hester
- Interactive Computing and Computer Science, Georgia Institute of Technology, Atlanta, GA, USA
| | - Douglas J Weber
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, USA
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Omid Veiseh
- Department of Bioengineering, Rice University, Houston, TX, USA
| | - Jonathan Rivnay
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA.
- Simpson Querrey Institute, Northwestern University, Chicago, IL, USA.
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.
| | - Tzahi Cohen-Karni
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, USA.
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA.
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Mehta AS, Teymoori S, Recendez C, Fregoso D, Gallegos A, Yang HY, Aslankoohi E, Rolandi M, Isseroff RR, Zhao M, Gomez M. Quantifying innervation facilitated by deep learning in wound healing. Sci Rep 2023; 13:16885. [PMID: 37803028 PMCID: PMC10558471 DOI: 10.1038/s41598-023-42743-5] [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: 06/20/2023] [Accepted: 09/14/2023] [Indexed: 10/08/2023] Open
Abstract
The peripheral nerves (PNs) innervate the dermis and epidermis, and are suggested to play an important role in wound healing. Several methods to quantify skin innervation during wound healing have been reported. Those usually require multiple observers, are complex and labor-intensive, and the noise/background associated with the immunohistochemistry (IHC) images could cause quantification errors/user bias. In this study, we employed the state-of-the-art deep neural network, Denoising Convolutional Neural Network (DnCNN), to perform pre-processing and effectively reduce the noise in the IHC images. Additionally, we utilized an automated image analysis tool, assisted by Matlab, to accurately determine the extent of skin innervation during various stages of wound healing. The 8 mm wound is generated using a circular biopsy punch in the wild-type mouse. Skin samples were collected on days 3, 7, 10 and 15, and sections from paraffin-embedded tissues were stained against pan-neuronal marker- protein-gene-product 9.5 (PGP 9.5) antibody. On day 3 and day 7, negligible nerve fibers were present throughout the wound with few only on the lateral boundaries of the wound. On day 10, a slight increase in nerve fiber density appeared, which significantly increased on day 15. Importantly, we found a positive correlation (R2 = 0.926) between nerve fiber density and re-epithelization, suggesting an association between re-innervation and re-epithelization. These results established a quantitative time course of re-innervation in wound healing, and the automated image analysis method offers a novel and useful tool to facilitate the quantification of innervation in the skin and other tissues.
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Affiliation(s)
- Abijeet Singh Mehta
- Department of Dermatology, University of California, Davis, CA, 95616, USA.
- Department of Ophthalmology, University of California, Davis, CA, 95616, USA.
| | - Sam Teymoori
- Department of Applied Mathematics, University of California, Santa Cruz, CA, 95064, USA
| | - Cynthia Recendez
- Department of Dermatology, University of California, Davis, CA, 95616, USA
- Department of Ophthalmology, University of California, Davis, CA, 95616, USA
| | - Daniel Fregoso
- Department of Dermatology, University of California, Davis, CA, 95616, USA
| | - Anthony Gallegos
- Department of Dermatology, University of California, Davis, CA, 95616, USA
| | - Hsin-Ya Yang
- Department of Dermatology, University of California, Davis, CA, 95616, USA
| | - Elham Aslankoohi
- Department of Electrical and Computer Engineering, University of California, Santa Cruz, CA, 95064, USA
| | - Marco Rolandi
- Department of Electrical and Computer Engineering, University of California, Santa Cruz, CA, 95064, USA
| | | | - Min Zhao
- Department of Dermatology, University of California, Davis, CA, 95616, USA.
- Department of Ophthalmology, University of California, Davis, CA, 95616, USA.
| | - Marcella Gomez
- Department of Applied Mathematics, University of California, Santa Cruz, CA, 95064, USA.
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Mehta AS, Teymoori S, Recendez C, Fregoso D, Gallegos A, Yang HY, Isseroff R, Zhao M, Gomez M, Aslankoohi E, Rolandi M. Quantifying innervation facilitated by deep learning in wound healing. Res Sq 2023:rs.3.rs-3088471. [PMID: 37461461 PMCID: PMC10350234 DOI: 10.21203/rs.3.rs-3088471/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/24/2023]
Abstract
The peripheral nerves (PNs) innervate the dermis and epidermis, which have been suggested to play an important role in wound healing. Several methods to quantify skin innervation during wound healing have been reported. Those usually require multiple observers, are complex and labor-intensive, and noise/background associated with the Immunohistochemistry (IHC) images could cause quantification errors/user bias. In this study, we employed the state-of-the-art deep neural network, DnCNN, to perform pre-processing and effectively reduce the noise in the IHC images. Additionally, we utilized an automated image analysis tool, assisted by Matlab, to accurately determine the extent of skin innervation during various stages of wound healing. The 8mm wound is generated using a circular biopsy punch in the wild-type mouse. Skin samples were collected on days 3,7,10 and 15, and sections from paraffin-embedded tissues were stained against pan-neuronal marker- protein-gene-product 9.5 (PGP 9.5) antibody. On day 3 and day 7, negligible nerve fibers were present throughout the wound with few only on the lateral boundaries of the wound. On day 10, a slight increase in nerve fiber density appeared, which significantly increased on day 15. Importantly we found a positive correlation (R 2 = 0.933) between nerve fiber density and re-epithelization, suggesting an association between re-innervation and re-epithelization. These results established a quantitative time course of re-innervation in wound healing, and the automated image analysis method offers a novel and useful tool to facilitate the quantification of innervation in the skin and other tissues.
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Mehta AS, Teymoori S, Recendez C, Fregoso D, Gallegos A, Yang HY, Isseroff RR, Zhao M, Gomez M. Quantifying innervation facilitated by deep learning in wound healing. bioRxiv 2023:2023.06.14.544960. [PMID: 37398108 PMCID: PMC10312705 DOI: 10.1101/2023.06.14.544960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
The peripheral nerves (PNs) innervate the dermis and epidermis, which have been suggested to play an important role in wound healing. Several methods to quantify skin innervation during wound healing have been reported. Those usually require multiple observers, are complex and labor-intensive, and noise/background associated with the Immunohistochemistry (IHC) images could cause quantification errors/user bias. In this study, we employed the state-of-the-art deep neural network, DnCNN, to perform pre-processing and effectively reduce the noise in the IHC images. Additionally, we utilized an automated image analysis tool, assisted by Matlab, to accurately determine the extent of skin innervation during various stages of wound healing. The 8mm wound is generated using a circular biopsy punch in the wild-type mouse. Skin samples were collected on days 3,7,10 and 15, and sections from paraffin-embedded tissues were stained against pan-neuronal marker- protein-gene-product 9.5 (PGP 9.5) antibody. On day 3 and day 7, negligible nerve fibers were present throughout the wound with few only on the lateral boundaries of the wound. On day 10, a slight increase in nerve fiber density appeared, which significantly increased on day 15. Importantly we found a positive correlation (R- 2 = 0.933) between nerve fiber density and re-epithelization, suggesting an association between re-innervation and re-epithelization. These results established a quantitative time course of re-innervation in wound healing, and the automated image analysis method offers a novel and useful tool to facilitate the quantification of innervation in the skin and other tissues.
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Mehta AS, Ha P, Zhu K, Li S, Ting K, Soo C, Zhang X, Zhao M. Physiological electric fields induce directional migration of mammalian cranial neural crest cells. Dev Biol 2020; 471:97-105. [PMID: 33340512 DOI: 10.1016/j.ydbio.2020.12.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 12/09/2020] [Accepted: 12/10/2020] [Indexed: 12/23/2022]
Abstract
During neurulation, cranial neural crest cells (CNCCs) migrate long distances from the neural tube to their terminal site of differentiation. The pathway traveled by the CNCCs defines the blueprint for craniofacial construction, abnormalities of which contribute to three-quarters of human birth defects. Biophysical cues like naturally occurring electric fields (EFs) have been proposed to be one of the guiding mechanisms for CNCC migration from the neural tube to identified position in the branchial arches. Such endogenous EFs can be mimicked by applied EFs of physiological strength that has been reported to guide the migration of amphibian and avian neural crest cells (NCCs), namely galvanotaxis or electrotaxis. However, the behavior of mammalian NCCs in external EFs has not been reported. We show here that mammalian CNCCs migrate towards the anode in direct current (dc) EFs. Reversal of the field polarity reverses the directedness. The response threshold was below 30 mV/mm and the migration directedness and displacement speed increased with increase in field strength. Both CNCC line (O9-1) and primary mouse CNCCs show similar galvanotaxis behavior. Our results demonstrate for the first time that the mammalian CNCCs respond to physiological EFs by robust directional migration towards the anode in a voltage-dependent manner.
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Affiliation(s)
- Abijeet Singh Mehta
- Department of Ophthalmology & Vision Science, Institute for Regenerative Cures, Center for Neuroscience, University of California at Davis, School of Medicine, Suite 1630, Room 1617, 2921 Stockton Blvd., Sacramento, CA, 95817, USA; Department of Dermatology, University of California, Davis, CA, USA
| | - Pin Ha
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, CA, USA
| | - Kan Zhu
- Department of Ophthalmology & Vision Science, Institute for Regenerative Cures, Center for Neuroscience, University of California at Davis, School of Medicine, Suite 1630, Room 1617, 2921 Stockton Blvd., Sacramento, CA, 95817, USA; Department of Dermatology, University of California, Davis, CA, USA
| | - ShiYu Li
- Department of Ophthalmology & Vision Science, Institute for Regenerative Cures, Center for Neuroscience, University of California at Davis, School of Medicine, Suite 1630, Room 1617, 2921 Stockton Blvd., Sacramento, CA, 95817, USA; Department of Dermatology, University of California, Davis, CA, USA
| | - Kang Ting
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, CA, USA
| | - Chia Soo
- Division of Plastic and Reconstructive Surgery and Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, University of California, Los Angeles, CA, 90095, USA
| | - Xinli Zhang
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, CA, USA.
| | - Min Zhao
- Department of Ophthalmology & Vision Science, Institute for Regenerative Cures, Center for Neuroscience, University of California at Davis, School of Medicine, Suite 1630, Room 1617, 2921 Stockton Blvd., Sacramento, CA, 95817, USA; Department of Dermatology, University of California, Davis, CA, USA.
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Abstract
This review provides a comprehensive overview on the biomedical applications of electrical stimulation (EStim). EStim has a wide range of direct effects on both biomolecules and cells. These effects have been exploited to facilitate proliferation and functional development of engineered tissue constructs for regenerative medicine applications. They have also been tested or used in clinics for pain mitigation, muscle rehabilitation, the treatment of motor/consciousness disorders, wound healing, and drug delivery. However, the research on fundamental mechanism of cellular response to EStim has fell behind its applications, which has hindered the full exploitation of the clinical potential of EStim. Moreover, despite the positive outcome from the in vitro and animal studies testing the efficacy of EStim, existing clinical trials failed to establish strong, conclusive supports for the therapeutic efficacy of EStim for most of the clinical applications mentioned above. Two potential directions of future research to improve the clinical utility of EStim are presented, including the optimization and standardization of the stimulation protocol and the development of more tissue-matching devices.
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Affiliation(s)
- Siwei Zhao
- Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, 985965 Nebraska Medical Center, Omaha, NE, 68198, USA.
- Department of Surgery, University of Nebraska Medical Center, Nebraska Medical Center 985965, Omaha, NE, 68198, USA.
| | - Abijeet Singh Mehta
- Department of Dermatology, University of California, Davis, CA, USA
- Department of Ophthalmology & Vision Science, Institute for Regenerative Cures, Center for Neuroscience, University of California at Davis, School of Medicine, Suite 1630, Room 1617, 2921 Stockton Blvd., Sacramento, CA, 95817, USA
| | - Min Zhao
- Department of Dermatology, University of California, Davis, CA, USA
- Department of Ophthalmology & Vision Science, Institute for Regenerative Cures, Center for Neuroscience, University of California at Davis, School of Medicine, Suite 1630, Room 1617, 2921 Stockton Blvd., Sacramento, CA, 95817, USA
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Gogia N, Sarkar A, Mehta AS, Ramesh N, Deshpande P, Kango-Singh M, Pandey UB, Singh A. Inactivation of Hippo and cJun-N-terminal Kinase (JNK) signaling mitigate FUS mediated neurodegeneration in vivo. Neurobiol Dis 2020; 140:104837. [PMID: 32199908 DOI: 10.1016/j.nbd.2020.104837] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [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: 10/16/2019] [Revised: 03/03/2020] [Accepted: 03/16/2020] [Indexed: 12/12/2022] Open
Abstract
Amyotrophic Lateral Sclerosis (ALS), a late-onset neurodegenerative disorder characterized by the loss of motor neurons in the central nervous system, has no known cure to-date. Disease causing mutations in human Fused in Sarcoma (FUS) leads to aggressive and juvenile onset of ALS. FUS is a well-conserved protein across different species, which plays a crucial role in regulating different aspects of RNA metabolism. Targeted misexpression of FUS in Drosophila model recapitulates several interesting phenotypes relevant to ALS including cytoplasmic mislocalization, defects at the neuromuscular junction and motor dysfunction. We screened for the genetic modifiers of human FUS-mediated neurodegenerative phenotype using molecularly defined deficiencies. We identified hippo (hpo), a component of the evolutionarily conserved Hippo growth regulatory pathway, as a genetic modifier of FUS mediated neurodegeneration. Gain-of-function of hpo triggers cell death whereas its loss-of-function promotes cell proliferation. Downregulation of the Hippo signaling pathway, using mutants of Hippo signaling, exhibit rescue of FUS-mediated neurodegeneration in the Drosophila eye, as evident from reduction in the number of TUNEL positive nuclei as well as rescue of axonal targeting from the retina to the brain. The Hippo pathway activates c-Jun amino-terminal (NH2) Kinase (JNK) mediated cell death. We found that downregulation of JNK signaling is sufficient to rescue FUS-mediated neurodegeneration in the Drosophila eye. Our study elucidates that Hippo signaling and JNK signaling are activated in response to FUS accumulation to induce neurodegeneration. These studies will shed light on the genetic mechanism involved in neurodegeneration observed in ALS and other associated disorders.
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Affiliation(s)
- Neha Gogia
- Department of Biology, University of Dayton, Dayton, OH 45469, USA
| | - Ankita Sarkar
- Department of Biology, University of Dayton, Dayton, OH 45469, USA
| | | | - Nandini Ramesh
- Department of Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, PA, USA
| | | | - Madhuri Kango-Singh
- Department of Biology, University of Dayton, Dayton, OH 45469, USA; Premedical Program, University of Dayton, Dayton, OH 45469, USA; Center for Tissue Regeneration and Engineering at Dayton (TREND), University of Dayton, Dayton, OH 45469, USA
| | - Udai Bhan Pandey
- Department of Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, PA, USA
| | - Amit Singh
- Department of Biology, University of Dayton, Dayton, OH 45469, USA; Premedical Program, University of Dayton, Dayton, OH 45469, USA; Center for Tissue Regeneration and Engineering at Dayton (TREND), University of Dayton, Dayton, OH 45469, USA; The Integrative Science and Engineering Center, University of Dayton, Dayton, OH 45469, USA; Center for Genomic Advocacy (TCGA), Indiana State University, Terre Haute, IN, USA.
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Mehta AS, Luz-Madrigal A, Li JL, Tsonis PA, Singh A. Comparative transcriptomic analysis and structure prediction of novel Newt proteins. PLoS One 2019; 14:e0220416. [PMID: 31419228 PMCID: PMC6697330 DOI: 10.1371/journal.pone.0220416] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 07/15/2019] [Indexed: 01/25/2023] Open
Abstract
Notophthalmus viridescens (Red-spotted Newt) possess amazing capabilities to regenerate their organs and other tissues. Previously, using a de novo assembly of the newt transcriptome combined with proteomic validation, our group identified a novel family of five protein members expressed in adult tissues during regeneration in Notophthalmus viridescens. The presence of a putative signal peptide suggests that all these proteins are secretory in nature. Here we employed iterative threading assembly refinement (I-TASSER) server to generate three-dimensional structure of these novel Newt proteins and predicted their function. Our data suggests that these proteins could act as ion transporters, and be involved in redox reaction(s). Due to absence of transgenic approaches in N. viridescens, and conservation of genetic machinery across species, we generated transgenic Drosophila melanogaster to misexpress these genes. Expression of 2775 transcripts were compared between these five newly identified Newt genes. We found that genes involved in the developmental process, cell cycle, apoptosis, and immune response are among those that are highly enriched. To validate the RNA Seq. data, expression of six highly regulated genes were verified using real time Quantitative Polymerase Chain Reaction (RT-qPCR). These graded gene expression patterns provide insight into the function of novel protein family identified in Newt, and layout a map for future studies in the field.
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Affiliation(s)
- Abijeet Singh Mehta
- Department of Biology, University of Dayton, Dayton, Ohio, United States of America
| | - Agustin Luz-Madrigal
- Department of Biology, University of Dayton, Dayton, Ohio, United States of America
| | - Jian-Liang Li
- Sanford Burnham Prebys Medical Discovery Institute at Lake Nona, Orlando, Florida, United States of America
| | - Panagiotis A Tsonis
- Department of Biology, University of Dayton, Dayton, Ohio, United States of America
| | - Amit Singh
- Department of Biology, University of Dayton, Dayton, Ohio, United States of America
- Premedical Program, University of Dayton, Dayton, Ohio, United States of America
- Center for Tissue Regeneration and Engineering at Dayton (TREND), University of Dayton, Dayton, Ohio, United States of America
- The Integrative Science and Engineering Center, University of Dayton, Dayton, Ohio, United States of America
- Center for Genomic Advocacy (TCGA), Indiana State University, Terre Haute, Indiana, United States of America
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Abstract
Glycosylated proteins account for a majority of the posttranslation modifications of cell surface, secreted, and circulating proteins. Within the tumor microenvironment, the presence of immune cells, extracellular matrix proteins, cell surface receptors, and interactions between stroma and tumor cells are all processes mediated by glycan binding and recognition reactions. Changes in glycosylation during tumorigenesis are well documented to occur and affect all of these associated adhesion and regulatory functions. A MALDI imaging mass spectrometry (MALDI-IMS) workflow for profiling N-linked glycan distributions in fresh/frozen tissues and formalin-fixed paraffin-embedded tissues has recently been developed. The key to the approach is the application of a molecular coating of peptide-N-glycosidase to tissues, an enzyme that cleaves asparagine-linked glycans from their protein carrier. The released N-linked glycans can then be analyzed by MALDI-IMS directly on tissue. Generally 40 or more individual glycan structures are routinely detected, and when combined with histopathology localizations, tumor-specific glycans are readily grouped relative to nontumor regions and other structural features. This technique is a recent development and new approach in glycobiology and mass spectrometry imaging research methodology; thus, potential uses such as tumor-specific glycan biomarker panels and other applications are discussed.
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Affiliation(s)
- R R Drake
- Medical University of South Carolina, Charleston, SC, United States.
| | - T W Powers
- Medical University of South Carolina, Charleston, SC, United States
| | - E E Jones
- Medical University of South Carolina, Charleston, SC, United States
| | - E Bruner
- Medical University of South Carolina, Charleston, SC, United States
| | - A S Mehta
- Medical University of South Carolina, Charleston, SC, United States
| | - P M Angel
- Medical University of South Carolina, Charleston, SC, United States
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Snigdha K, Singh BK, Mehta AS, Tewari RP, Dutta PK. Self-assembling N-(9-Fluorenylmethoxycarbonyl)-l-Phenylalanine hydrogel as novel drug carrier. Int J Biol Macromol 2016; 93:1639-1646. [PMID: 27126167 DOI: 10.1016/j.ijbiomac.2016.04.072] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 04/16/2016] [Accepted: 04/22/2016] [Indexed: 10/21/2022]
Abstract
Supramolecular hydrogel as a novel drug carrier was prepared from N-(9-Fluorenylmethoxycarbonyl) (Fmoc) modified l-phenylalanine. Its different properties like stability at different pH, temperature and rheology were evaluated in reference to salicylic acid (SA) as a model drug, entrapped in the supramolecular hydrogel network. The release behaviour of SA drug in supramolecular hydrogel was investigated by UV-vis spectroscopy. The influence of hydrogelator, pH values of the accepting media, temperature and concentration of SA drug on the release behaviour was investigated under static conditions. The results indicated that the release rate of SA in the supramolecular hydrogels was slightly retarded with an increase of the hydrogelator concentration. Also, the release rates of SA increased with an increase of temperature and its concentration. Furthermore, the release behaviour of SA was found to be different at various pH values in buffers. The study of the release kinetics indicated that the release behaviour of SA from the carrier was in accord with the Peppas model and the diffusion controlled mechanism involved in the Fickian model.
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Affiliation(s)
- Kirti Snigdha
- Department of Biology, University of Dayton, Dayton, OH, USA; Department of Applied Mechanics, Motilal Nehru National Institute of Technology, Allahabad-211004, India
| | - Brijesh K Singh
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211004, India
| | - Abijeet Singh Mehta
- Department of Biology, University of Dayton, Dayton, OH, USA; Department of Applied Mechanics, Motilal Nehru National Institute of Technology, Allahabad-211004, India
| | - R P Tewari
- Department of Applied Mechanics, Motilal Nehru National Institute of Technology, Allahabad-211004, India
| | - P K Dutta
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211004, India.
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Mehta AS, Snigdha K, Potukuchi MS, Tsonis PA. Comparative sequence- and structure-inspired drug design for PilF protein of Neisseria meningitidis. Hum Genomics 2015; 9:5. [PMID: 25928839 PMCID: PMC4425860 DOI: 10.1186/s40246-015-0027-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 04/01/2015] [Indexed: 11/19/2022] Open
Abstract
Serogroup A of Neisseria meningitidis is the organism responsible for causing epidemic diseases in developing countries by a pilus-mediated adhesion to human brain endothelial cells. Type IV pilus assembly protein (PilF) associated with bacterial adhesion, aggregation, invasion, host cell signaling, surface motility, and natural transformation can be considered as a candidate for effective anti-meningococcal drug development. Since the crystal structure of PilF was not available, in the present study, it was modeled after the Z2491 strain (CAM09255.1) using crystal structure of chain A of Vibrio cholerae putative Ntpase EpsE (Protein Data Bank (PDB) ID: 1P9R) and then we based this analysis on sequence comparisons and structural similarity using in silico methods and docking processes, to design a suitable inhibitor molecule. The ligand 3-{(4S)-5-{[(1R)-1-cyclohexylethyl]amino}-4-[(5S)-5-(prop-2-en-1-yl) cyclopent-1-en-1-yl]-1,4-dihydro-7H-pyrrolo[2,3-d] pyrimidin-7-yl}-1,2-dideoxy-b-L-erythro-hex-1-en-3-ulofuranosyl binds to the protein with a binding energy of -8.10 kcal and showed a drug likeness of 0.952 with no predicted health hazard. It can be utilized as a potent inhibitor of N. meningitidis pilus-mediated adhesion to human brain endothelial cells preventing meningeal colonization.
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Affiliation(s)
| | - Kirti Snigdha
- Department of Biology, University of Dayton, Dayton, OH, USA.
| | - M Sharada Potukuchi
- School of Biotechnology, Shri Mata Vaishno Devi University, Katra, J&K, India.
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Mehta AS, Singh BK, Singh N, Archana D, Snigdha K, Harniman R, Rahatekar SS, Tewari RP, Dutta PK. Chitosan silk-based three-dimensional scaffolds containing gentamicin-encapsulated calcium alginate beads for drug administration and blood compatibility. J Biomater Appl 2014; 29:1314-25. [DOI: 10.1177/0885328214563148] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In the present study gentamicin was encapsulated within calcium alginate beads and incorporated into porous chitosan, gelatin, double-hybrid silk fibroin, chitosan/gelatin and double-hybrid silk fibroin/chitosan scaffolds. Physiochemical, morphological and biological properties of fabricated amenable model systems were evaluated, revealing hemocompatible nature of double-hybrid silk fibroin/chitosan and double-hybrid silk fibroin scaffolds of hemolysis %<5 and porosity >85%. Fourier transform infrared results confirmed the blend formation and scanning electron microscope images showed good interconnectivity. Double-hybrid silk fibroin/chitosan-blended scaffold shows higher compressive strength and compressive modulus than other fabricated scaffolds. A comparative drug release profile of fabricated scaffolds revealed that double-hybrid silk fibroin/chitosan scaffold is a pertinent model system because of its prolonged drug release, optimal hemocompatability and high compressive modulus.
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Affiliation(s)
- Abijeet Singh Mehta
- Department of Applied Mechanics (Biomedical Engineering), Motilal Nehru National Institute of Technology, Allahabad, India
| | - Brijesh K Singh
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India
| | - Nandita Singh
- School of Cellular & Molecular Medicine, University of Bristol, Bristol, UK
| | - D Archana
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India
| | - Kirti Snigdha
- Department of Applied Mechanics (Biomedical Engineering), Motilal Nehru National Institute of Technology, Allahabad, India
| | | | - Sameer S Rahatekar
- Advanced Composites Centre for Innovation and Science (ACCIS), Aerospace Engineering, University of Bristol, Bristol, UK
| | - RP Tewari
- Department of Applied Mechanics (Biomedical Engineering), Motilal Nehru National Institute of Technology, Allahabad, India
| | - PK Dutta
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India
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Singh RB, Beegom R, Verma SP, Haque M, Singh R, Mehta AS, De AK, Kundu S, Roy S, Krishnan A, Simhadri H, Paranjpe NB, Agarwal N. Association of dietary factors and other coronary risk factors with social class in women in five Indian cities. Asia Pac J Clin Nutr 2014; 9:298-302. [PMID: 24394506 DOI: 10.1046/j.1440-6047.2000.00177.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The association between social classes, food intake and coronary risk factors was determined. Cross-sectional surveys were conducted in 6-12 urban streets in each of five cities, each one from five different regions of India using similar methods of dietary intakes and criteria of diagnosis. We randomly selected 3257 women aged 25-64 years inclusive, from Moradabad (n = 902), Trivandrum (n = 760), Calcutta (n = 410), Nagpur (n = 405) and Bombay (n = 780). All subjects, after pooling of data, were divided into social class 1 (n = 985), class 2 (n = 790), class 3 (n = 774), class 4 (n = 602) and class 5 (n = 206) based on various attributes of socioeconomic status. Social class 1 was the highest and 5 was the lowest social class. Social classes 1-3 had greater intake of pro-atherogenic foods; total visible fat, milk and milk products, meat and eggs, as well as sugar and confectionery, compared to social classes 4 and 5. The consumption of wheat, rice, millets, fruits, vegetables and legume/total visible fat ratio were inversely associated with social class. Mean body mass index (BMI), obesity, overweight, central obesity and sedentary lifestyle were also significantly more common among subjects from higher social classes. Spearman's rank correlation showed that bodyweight, BMI, wheat, rice, millets, total visible fat, milk and milk products, meat, eggs, sugar and jaggery intakes were significantly correlated with social class. Social class 5 subjects had a lower intake of all foods and a lower BMI, suggestive of a higher rate of undernutrition among them. The findings indicate that the consumption of pro-atherogenic foods and other coronary risk factors are more common in higher social classes compared to lower social classes.
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Affiliation(s)
- R B Singh
- Preventive Cardiology and Nutrition, Heart Research Laboratory MHRC Civil Lines, Moradabad-10 (UP) 244001, India
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Zitzmann N, Mehta AS, Carrouée S, Butters TD, Platt FM, McCauley J, Blumberg BS, Dwek RA, Block TM. Imino sugars inhibit the formation and secretion of bovine viral diarrhea virus, a pestivirus model of hepatitis C virus: implications for the development of broad spectrum anti-hepatitis virus agents. Proc Natl Acad Sci U S A 1999; 96:11878-82. [PMID: 10518544 PMCID: PMC18380 DOI: 10.1073/pnas.96.21.11878] [Citation(s) in RCA: 266] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
One function of N-linked glycans is to assist in the folding of glycoproteins by mediating interactions of the lectin-like chaperone proteins calnexin and calreticulin with nascent glycoproteins. These interactions can be prevented by inhibitors of the alpha-glucosidases, such as N-butyl-deoxynojirimycin (NB-DNJ) and N-nonyl-DNJ (NN-DNJ), and this causes some proteins to be misfolded and retained within the endoplasmic reticulum (ER). We have shown previously that the NN-DNJ-induced misfolding of one of the hepatitis B virus (HBV) envelope glycoproteins prevents the formation and secretion of virus in vitro and that this inhibitor alters glycosylation and reduces the viral levels in an animal model of chronic HBV infection. This led us to investigate the effect of glucosidase inhibitors on another ER-budding virus, bovine viral diarrhea virus, a tissue culture surrogate of human hepatitis C virus (HCV). Here we show that in MDBK cells alpha-glucosidase inhibitors prevented the formation and secretion of infectious bovine viral diarrhea virus. Data also are presented showing that NN-DNJ, compared with NB-DNJ, exhibits a prolonged retention in liver in vivo. Because viral secretion is selectively hypersensitive to glucosidase inhibition relative to the secretion of cellular proteins, the possibility that glucosidase inhibitors could be used as broad-based antiviral hepatitis agents is discussed. A single drug against HBV, HCV, and, possibly, HDV, which together chronically infect more than 400 million people worldwide, would be of great therapeutic value.
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Affiliation(s)
- N Zitzmann
- The Glycobiology Institute, Department of Biochemistry, Oxford University, Oxford, OX1 3QU, United Kingdom
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Singh RB, Beegom R, Mehta AS, Niaz MA, De AK, Mitra RK, Haque M, Verma SP, Dube GK, Siddiqui HM, Wander GS, Janus ED, Postiglione A, Haque MS. Social class, coronary risk factors and undernutrition, a double burden of diseases, in women during transition, in five Indian cities. Int J Cardiol 1999; 69:139-47. [PMID: 10549837 DOI: 10.1016/s0167-5273(99)00010-8] [Citation(s) in RCA: 52] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To find out the association between social class and coronary risk factors in women. DESIGN AND SETTING Cross-sectional surveys were conducted in six-twelve urban streets in each of five cities from various regions of India following a common study protocol and criteria of diagnosis. SUBJECTS AND METHODS We randomly selected 3257 women, aged 25-64 years inclusive, from the cities of Moradabad (n=902), Trivandrum (n=760) Calcutta (n=410), Nagpur (n=405) and Bombay (n=780). Evaluation was by questionnaires validated at Moradabad. All subjects, after pooling of data, were divided into social class 1 (n=985), social class 2 (n=790), social class 3 (n=674), social class 4 (n=602) and social class 5 (n=206), based on various attributes of socioeconomic status. RESULTS The prevalence of hypertension, diabetes mellitus, family history of coronary disease, obesity, central obesity and sedentary lifestyle were significantly associated with higher social classes and tobacco consumption was not associated with social class. Oral contraceptive intake and postmenopausal status were also more common among higher social classes, which may be due to more education and a longer lifespan among the higher social classes, respectively. Mean total cholesterol, high density lipoprotein cholesterol, systolic and diastolic blood pressure, mean body mass index and waist-hip ratio showed significant association with higher social classes. Mean age, body weight, body mass index, waist-hip ratio, systolic and diastolic blood pressure, total cholesterol and 2-h blood glucose were significantly positively correlated with social class, as assessed by Spearman's rank correlation. Higher social classes 1-3 were more common in Trivandrum and Bombay than in Moradabad. The prevalence of hypertension, diabetes mellitus and being overweight (body mass index >25 kg/m2) were also more common in Trivandrum and Bombay compared to Moradabad. Undernutrition was negatively associated with higher social classes and was more common in Moradabad and Nagpur than Trivandrum. CONCLUSIONS Higher social classes among Indian urban women have a higher prevalence of coronary risk factors, hypertension, diabetes mellitus, being overweight, central obesity, sedentary lifestyle, family history of coronary disease, oral contraceptive intake and postmenopausal status. Mean concentrations of total and high density lipoprotein cholesterol were also significantly associated with higher social classes.
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Affiliation(s)
- R B Singh
- Heart Research Laboratory, Medical Hospital and Research Centre, Moradabad, India
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Block TM, Lu X, Mehta AS, Blumberg BS, Tennant B, Ebling M, Korba B, Lansky DM, Jacob GS, Dwek RA. Treatment of chronic hepadnavirus infection in a woodchuck animal model with an inhibitor of protein folding and trafficking. Nat Med 1998; 4:610-4. [PMID: 9585237 DOI: 10.1038/nm0598-610] [Citation(s) in RCA: 120] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A novel strategy for anti-viral intervention of hepatitis B virus (HBV) through the disruption of the proper folding and transport of the hepadnavirus glycoproteins is described. Laboratory reared woodchucks chronically infected with woodchuck hepatitis virus (WHV) were treated with N-nonyl-deoxynojirimycin (N-nonyl-DNJ), an inhibitor of the endoplasmic reticulum (ER) alpha-glucosidases. The woodchucks experienced significant dose dependent decreases in enveloped WHV, resulting in undetectable amounts in some cases. The reduction in viremia correlated with the levels of hyperglucosylated glycan in the serum of treated animals. This correlation supports the mechanism of action associated with the drug and highlights the extreme sensitivity of the virus to this type of glycan inhibitor. At N-nonyl-DNJ concentrations that prevented WHV secretion, the glycosylation of most serum glycoproteins appeared unaffected, suggesting great selectivity for this class of therapeutics. Indeed, this may account for the low toxicity of the compound over the treatment period. We provide the first evidence that glucosidase inhibitors can be used in vivo to alter specific steps in the N-linked glycosylation pathway and that this inhibition has anti-viral effects.
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Affiliation(s)
- T M Block
- Viral Hepatitis Group, Kimmel Cancer Center, Jefferson Medical College, Philadelphia, Pennsylvania 19107, USA
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Singh RB, Ghosh S, Beegom R, Mehta AS, De AK, Haque M, Dube GK, Wander GS, Kundu S, Roy S, Krishnan A, Simhadri H, Paranjpe NB, Agarwal N, Kalikar RH, Rastogi SS, Thakur AS. Prevalence and determinants of central obesity and age-specific waist:hip ratio of people in five cities: the Indian Women's Health Study. J Cardiovasc Risk 1998; 5:73-7. [PMID: 9821058] [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: 02/09/2023]
Abstract
OBJECTIVE To study the prevalence of central obesity and age-specific waist:hip ratio of urban women from five Indian cities. DESIGN AND SETTING Cross-sectional surveys were conducted in 6-12 urban streets in different parts of India using similar methods of sample selection and criteria of diagnosis. SUBJECTS AND METHODS We randomly selected 3212 women, aged 25-64 years, from Moradabad (n = 902), Trivandrum (n = 760), Calcutta (n = 365), Nagpur (n = 405), and Bombay (n = 780). Evaluation was by a questionnaire administered by a physician and a dietician, a physical examination, and anthropometric measurements. RESULTS The overall prevalence of central obesity among the total number of women was 55.0%, with the highest prevalence in Calcutta (62.2%) and the lowest in Bombay (47.4%). Waist:hip ratio was 0.85 +/- 0.13 (mean +/- SD) with the highest ratio for women in Calcutta (0.87 +/- 0.12) and the lowest for women in Moradabad (0.84 +/- 0.16). After pooling of data from all five cities, multivariate logistic regression analysis showed that, regardless of age, body mass index (> 23 kg/m2; odds ratio 1.12), sedentary lifestyle (odds ratio 2.51), and family history of obesity (odds ratio 2.15) were strongly associated with central obesity. Excess intake of fat was weakly associated with central obesity but age was not a risk factor for central obesity, although the prevalence was highest among those aged over 55 years in Moradabad, Calcutta, and Nagpur. CONCLUSIONS The overall prevalence of central obesity among the urban women of India has increased, more so in Calcutta and Trivandrum. Body mass index, sedentary lifestyle, and family history of excess intake of fat were significant risk factors for central obesity.
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Affiliation(s)
- R B Singh
- Centre of Nutrition, Medical Hospital and Research Centre, Moradabad, India
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Singh RB, Beegom R, Mehta AS, Niaz MA, De AK, Haque M, Bhattacharyya PR, Dube GK, Pandit RB, Thakur AS, Wander GS, Janus ED, Postiglione A, Moshiri M. Prevalence and risk factors of hypertension and age-specific blood pressures in five cities: a study of Indian women. NKP Salve Institute of Medical Sciences, Nagpur, India. Five City Study Group. Int J Cardiol 1998; 63:165-73. [PMID: 9510491 DOI: 10.1016/s0167-5273(97)00296-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To measure the prevalence of hypertension and age-specific blood pressure in urban populations from five Indian cities. Cross-sectional surveys were conducted in six-twenty urban streets in different cities from five different corners of India, using similar methods of sample selection and criteria. There were 3212 randomly selected women from Moradabad (n=902), Trivandrum (n=760), Calcutta (n=365), Nagpur (n=405) and Bombay (n=780), aged 25-64 years, inclusive. Evaluation was by a physician and a dietitian, an administered questionnaire, a physical examination and using a sphygmomanometer. The diagnosis of hypertension was based on old World Health Organisation criteria and new World Health Organisation/International Society of Hypertension criteria. The prevalence of hypertension (>140/90 mm Hg) was significantly (P<0.01) high in Trivandrum, South India (30.7%), and Bombay, West India (28.0%), compared to Moradabad, which is in northern India (22.6%), Nagpur, in central India (24.2%), and Calcutta, in east India (19.1%). Mean systolic and diastolic blood pressures were significantly higher in Trivandrum and Bombay compared to the other three cities. The overall prevalence of hypertension was 25.6% (n=823) and isolated diastolic hypertension was the most common form of hypertension (50.5%, n=1506) in the five Indian cities. According to old criteria, the overall prevalence of hypertension (>160/95 mm Hg) was 14.8% (n=481). Multivariate logistic regression analysis on pooled data from the five cities, after adjustment for age, showed that age (odds ratio 1.16), body mass index (1.68) and obesity were strongly associated with hypertension. A sedentary lifestyle and salt intake were weakly associated and alcohol intake was not a factor with these women.
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Affiliation(s)
- R B Singh
- Heart Research Laboratory, Medical Hospital and Research Centre, Moradabad, India
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Gajwani BW, Patel BC, Mehta AS, Bhatt RV, Pande RS, Venugopal K. Anaemias of pregnancy. J Indian Med Assoc 1969; 52:420-3. [PMID: 5798956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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