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Panda G, Barik D, Dash M. Understanding Matrix Stiffness in Vinyl Polymer Hydrogels: Implications in Bone Tissue Engineering. ACS Omega 2024; 9:17891-17902. [PMID: 38680357 PMCID: PMC11044159 DOI: 10.1021/acsomega.3c08877] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 02/23/2024] [Accepted: 02/28/2024] [Indexed: 05/01/2024]
Abstract
Matrix elasticity helps to direct bone cell differentiation, impact healing processes, and modify extracellular matrix deposition, all of which are required for tissue growth and maintenance. In this work, we evaluated the role of inorganic nanocrystals or mineral inducers such as nanohydroxyapatite, alkaline phosphatase, and nanoclay also known as montmorillonite deposited on vinyl-based hydrogels in generating matrices with different stiffness and their role in cell differentiation. Poly-2-(dimethylamino)ethyl methacrylate (PD) and poly-2-hydroxypropylmethacrylamide (PH) are the two types of vinyl polymers chosen for preparing hydrogels via thermal cross-linking. The hydrogels exhibited porosity, which decreased with an increase in stiffness. Each of the compositions is non-cytotoxic and maintains the viability of pre-osteoblasts (MC3T3-E1) and human bone marrow mesenchymal stem cells (hBMSCs). The PD hydrogels in the presence of ALP showed the highest mineralization ability confirmed through the alizarin assay and a better structural environment for their use as scaffolds for tissue engineering. The study reveals that understanding such interactions can generate hydrogels that can serve as efficient 3D models to study biomineralization.
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Affiliation(s)
| | - Debyashreeta Barik
- Institute
of Life Sciences, Nalco
Square, Bhubaneswar, Odisha 751023, India
- School
of Biotechnology, Kalinga Institute of Industrial
Technology (KIIT) University, Bhubaneswar, Odisha 751024, India
| | - Mamoni Dash
- Institute
of Life Sciences, Nalco
Square, Bhubaneswar, Odisha 751023, India
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2
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Barik D, Shyamal S, Das K, Jena S, Dash M. Glycoprotein Injectable Hydrogels Promote Accelerated Bone Regeneration through Angiogenesis and Innervation. Adv Healthc Mater 2023; 12:e2301959. [PMID: 37712303 DOI: 10.1002/adhm.202301959] [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: 06/21/2023] [Revised: 08/27/2023] [Indexed: 09/16/2023]
Abstract
Glycoproteins are gaining prominence as multifunctional biomaterials. The study reports development of glycoprotein mucin as biomaterial promoting bone regeneration. Mucin 1 deletion has resulted in stiffer femoral bones with scarce presence of osteoblasts in trabecular linings and its role has been established in determining bone mass and mineralization. Limited information about its structure limits its processability, exploration as biomaterial, which is discussed in this study. The role of mucin in ECM (extracellular cellular matrix) formation validated by RNA sequencing analysis of human bone marrow derived mesenchymal stem cells is reported. The structure and stability of mucins is dependent on the presence of glycans in its structure. A thermosensitive hydrogel acquired from thermosensitive Poly (N-isopropyl acrylamide)-(PNIPAM) modified mucin and collagen is developed. The hydrogel demonstrates porous structure and mechanical strength. Newly formed bone tissue is observed at 8 weeks post-implantation in the hydrogel treated groups. The formation of blood vessels, nerves, and bone is observed with upregulation of angiopoietin (ANG), neurofilament heavy chain (NF-H), and osteoadherin (OSAD) or osteocalcin (OCN) respectively in rat calvarial defects. The outcome demonstrates that the thermosensitive injectable hydrogel accelerates repair and healing in calvarial bone defects making it a promising biodegradable biomaterial capable of regenerating bone by promoting angiogenesis and innervation.
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Affiliation(s)
- Debyashreeta Barik
- Therapeutics Biomaterials Team, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) University, Bhubaneswar, Odisha, 751024, India
| | - Sharmistha Shyamal
- RNA Biology Lab, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Kapilash Das
- Therapeutics Biomaterials Team, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Sarita Jena
- Animal House Facility, DBT-Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Mamoni Dash
- Therapeutics Biomaterials Team, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
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3
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Dash P, Samal S, Prasad Panda G, Piras AM, Dash M. Polymeric Nanoformulation of Zoledronic Acid Rescues Osteoblasts from the Harmful Effect of its Native Form: An In Vitro Investigation of Cytotoxic Potential on Osteoblasts and Osteosarcoma Cells. Macromol Biosci 2023; 23:e2300211. [PMID: 37384621 DOI: 10.1002/mabi.202300211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 06/14/2023] [Accepted: 06/21/2023] [Indexed: 07/01/2023]
Abstract
Osteosarcoma (OS) is a malignant tumor, fatal for pediatric patients who do not respond to chemotherapy, alternative therapies and drugs can provide better outcomes. Zoledronic acid (Zol) belonging to the class of bisphosphonates (BPs) has a direct antitumor ability to prevent Ras GTPases modification and stimulate apoptosis. Despite advances in maintaining balance in skeletal events and direct anticancer properties, Zol causes cytotoxicity to normal healthy pre-osteoblast cells, hampering mineralization and differentiation. The study reports the preparation and evaluation of a nanoformulation that can diminish the existing drawbacks of native Zol. The cytotoxic effect is evaluated on bone cancer cells and healthy bone cells with three different cell lines namely, K7M2 (mouse OS cell line), SaOS2 (human OS cell line), and MC3T3E1 (healthy cell counterpart). It is observed that Zol nanoformulation is uptaken more (95%) in K7M2 whereas in MC3T3E1, the percent population internalizing nanoparticles (NPs) is 45%. Zol has a sustained release of 15% after 96 h from the NP which leads to a rescuing effect on the normal pre-osteoblast cells. In conclusion, it can be stated that Zol nanoformulation can be used as a good platform for a sustained release system with minimum side effects to normal bone cells.
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Affiliation(s)
- Pratigyan Dash
- Institute of Life Sciences, DBT-ILS, ILS, Nalco Nagar Rd, Nalco Square, Chandrasekharpur, Bhubaneswar, Odisha, 751023, India
- School of Biotechnology, KIIT University, KIIT Rd, Patia, Bhubaneswar, Odisha, 751024, India
| | - Sasmita Samal
- Institute of Life Sciences, DBT-ILS, ILS, Nalco Nagar Rd, Nalco Square, Chandrasekharpur, Bhubaneswar, Odisha, 751023, India
- School of Biotechnology, KIIT University, KIIT Rd, Patia, Bhubaneswar, Odisha, 751024, India
| | - Gyanendra Prasad Panda
- Institute of Life Sciences, DBT-ILS, ILS, Nalco Nagar Rd, Nalco Square, Chandrasekharpur, Bhubaneswar, Odisha, 751023, India
| | - Anna Maria Piras
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 12, Pisa, PI, 56126, Italy
| | - Mamoni Dash
- Institute of Life Sciences, DBT-ILS, ILS, Nalco Nagar Rd, Nalco Square, Chandrasekharpur, Bhubaneswar, Odisha, 751023, India
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4
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Das PK, Panda G, Patra K, Jena N, Dash M. The role of polyplexes in developing a green sustainable approach in agriculture. RSC Adv 2022; 12:34463-34481. [PMID: 36545618 PMCID: PMC9709925 DOI: 10.1039/d2ra06541j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 11/15/2022] [Indexed: 12/05/2022] Open
Abstract
Rise in global population has increased the food demands and thus the competition among farmers to produce more and more. In the race to obtain higher productivity, farmers have resorted to injudicious farming practices that include the reckless use of nitrogenous fertilizers and intensive cropping on farmlands. Such practices have paved the path for large scale infestations of crops and plants by pests thus affecting the plant productivity and crop vigour. There are several traditional techniques to control pest infestations in plants such as the use of chemical or bio-pesticides, and integrated pest management practices which face several drawbacks. Delivery of gene/nucleic acid in plants through genetic engineering approaches is a more sustainable and effective method of protection against pests. The technology of RNA interference (RNAi) provides a sustainable solution to counter pest control problems faced by other traditional techniques. The RNAi technique involves delivery of dsDNA/dsRNA or other forms of nucleic acids into target organisms thereby bringing about gene silencing. However, RNAi is also limited to its use because of their susceptibility to degradation wherein the use of cationic polymers can provide a tangible solution. Cationic polymers form stable complexes with the nucleic acids known as "polyplexes", which may be attributed to their high positive charge densities thus protecting the exogenous nucleic acids from extracellular degradation. The current paper focuses on the utility of nucleic acids as a sustainable tool for pest control in crops and the use of cationic polymers for the efficient delivery of nucleic acids in pests thus protecting the plant from infestations.
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Affiliation(s)
| | | | | | - Nivedita Jena
- Institute of Life Sciences, DBT-ILSBhubaneswarOdishaIndia
| | - Mamoni Dash
- Institute of Life Sciences, DBT-ILSBhubaneswarOdishaIndia
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Abstract
The etiopathogenesis of COVID-19 and its differential geographic spread suggest some populations are apparently 'less affected' through many host-related factors that involve angiotensin-converting enzyme 2 (ACE2) protein, which is also the entry receptor for SARS-CoV-2. The role of ACE2 has been well studied in COVID-19 but not in the context of malaria and COVID-19. We have previously suggested how malaria might intersect with COVID-19 through ACE2 mutation and here we evaluate the currently available data that could provide a link between the two diseases. Based on the existing global and Indian data on malaria, COVID-19 and the suggested ACE2 mutation, the association could not be examined robustly, neither accepting nor refuting the suggested hypothesis. We strongly recommend targeted evaluation of this hypothesis through carefully designed robust molecular epidemiological studies.
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Affiliation(s)
- A. De
- ICMR-National Institute of Malaria Research, New Delhi, India
| | - M. Dash
- ICMR-National Institute of Malaria Research, New Delhi, India
| | - A. Tiwari
- ICMR-National Institute of Malaria Research, New Delhi, India
| | - A. Sinha
- ICMR-National Institute of Malaria Research, New Delhi, India
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Barik D, Kundu K, Dash M. Montmorillonite stabilized chitosan- co-mucin hydrogel for tissue engineering applications. RSC Adv 2021; 11:30329-30342. [PMID: 35480259 PMCID: PMC9041129 DOI: 10.1039/d1ra04803a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 09/06/2021] [Indexed: 12/17/2022] Open
Abstract
The role of polymers has played a crucial role in developing templates that can promote regeneration as tissue-engineered matrices. The present study aims to develop functional matrices involving the protein mucin. The mucin used in this study is characterised using MALDI-TOF TOF and CD spectroscopy prior to conjugation. Thereupon, a hybrid scaffold comprising of a polysaccharide, chitosan, chemically conjugated to a protein, mucin, and encapsulated with montmorillonite is developed. Grafting of hydroxyethyl methacrylate (HEMA) is done to overcome the issue of mechanical weakness that mucin hydrogels usually undergo. It was observed that the presence of montmorillonite led to the stability of the hydrogels. The conjugations with varied ratios of the polysaccharide and protein were characterized using spectroscopic techniques. The prepared gels showed appreciable material properties in terms of water uptake and porosity. Hydrogels with different ratios of the polysaccharide and protein were evaluated for their biocompatibility. The biological evaluation of the hydrogels was performed with MC3T3E1 and C2C12 cell lines indicating their potential for wider tissue engineering applications.
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Affiliation(s)
- Debyashreeta Barik
- Institute of Life Sciences Nalco Square Odisha India .,School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) University Bhubaneswar Odisha 751024 India
| | - Koustav Kundu
- Institute of Life Sciences Nalco Square Odisha India
| | - Mamoni Dash
- Institute of Life Sciences Nalco Square Odisha India
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Barik D, Dash P, Uma PI, Kumari S, Dash M. A Review on Re-Packaging of Bisphosphonates Using Biomaterials. J Pharm Sci 2021; 110:3757-3772. [PMID: 34474062 DOI: 10.1016/j.xphs.2021.08.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 12/19/2022]
Abstract
The need for bone repair and insight into new regeneration therapies as well as improvement of existing regeneration routes is constantly increasing as a direct consequence of the rise in the number of trauma victims, musculoskeletal disorders, and increased life expectancy. Bisphosphonates (BPs) have emerged as a class of drugs with proven efficacy against many bone disorders. The most recent ability of this class of drugs is being explored in its anti-cancer ability. However, despite the pharmacological success, there are certain shortcomings that have circumvented this class of the drug. The mediation of biomaterials in delivering bisphosphonates has greatly helped in overcoming some of these shortcomings. This article is focused on reviewing the benefits the bisphosphonates have provided upon getting delivered via the use of biomaterials. Furthermore, the role of bisphosphonates as a potent anticancer agent is also accounted. It is witnessed that employing engineering tools in combination with therapeutics has the potential to provide solutions to bone loss from degenerative, surgical, or traumatic processes, and also aid in accelerating the healing of large bone fractures and problematic non-union fractures. The role of nanotechnology in enhancing the efficacy of the bisphosphonates is also reviewed and innovative approaches are identified.
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Affiliation(s)
- Debyashreeta Barik
- Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India; School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) University, 751024, Bhubaneswar, Odisha, India
| | - Pratigyan Dash
- Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India; School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) University, 751024, Bhubaneswar, Odisha, India
| | - P I Uma
- Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India
| | - Sneha Kumari
- Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India
| | - Mamoni Dash
- Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India.
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Barik D, Bejugam PR, Nayak C, Mohanty KT, Singha A, Declercq HA, Dash M. Polymer–Protein Hybrid Network Involving Mucin: A Mineralized Biomimetic Template for Bone Tissue Engineering. Macromol Biosci 2021. [DOI: 10.1002/mabi.202170016] [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: 11/08/2022]
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9
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Samal S, Dash P, Dash M. Drug Delivery to the Bone Microenvironment Mediated by Exosomes: An Axiom or Enigma. Int J Nanomedicine 2021; 16:3509-3540. [PMID: 34045855 PMCID: PMC8149288 DOI: 10.2147/ijn.s307843] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 03/30/2021] [Indexed: 12/12/2022] Open
Abstract
The increasing incidence of bone-related disorders is causing a burden on the clinical scenario. Even though bone is one of the tissues that possess tremendous regenerative potential, certain bone anomalies need therapeutic intervention through appropriate delivery of a drug. Among several nanosystems and biologics that offer the potential to contribute towards bone healing, the exosomes from the class of extracellular vesicles are outstanding. Exosomes are extracellular nanovesicles that, apart from the various advantages, are standing out of the crowd for their ability to conduct cellular communication. The internal cargo of the exosomes is leading to its potential use in therapeutics. Exosomes are being unraveled in terms of the mechanism as well as application in targeting various diseases and tissues. Through this review, we have tried to understand and review all that is already established and the gap areas that still exist in utilizing them as drug delivery vehicles targeting the bone. The review highlights the potential of the exosomes towards their contribution to the drug delivery scenario in the bone microenvironment. A comparison of the pros and cons of exosomes with other prevalent drug delivery systems is also done. A section on the patents that have been generated so far from this field is included.
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Affiliation(s)
- Sasmita Samal
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) University, Bhubaneswar, Odisha, 751024, India
| | - Pratigyan Dash
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) University, Bhubaneswar, Odisha, 751024, India
| | - Mamoni Dash
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
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10
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Barik D, Bejugam PR, Nayak C, Mohanty KT, Singha A, Declercq HA, Dash M. Polymer-Protein Hybrid Network Involving Mucin: A Mineralized Biomimetic Template for Bone Tissue Engineering. Macromol Biosci 2021; 21:e2000381. [PMID: 33871165 DOI: 10.1002/mabi.202000381] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 03/26/2021] [Indexed: 11/09/2022]
Abstract
Biomimetic matrices offer a great advantage to understand several biological processes including regeneration. The study involves the development of a hybrid biomimetic scaffold and the uniqueness lies in the use of mucin, as a constituent protein. Through this study, the role of the protein in bone regeneration is deciphered through its development as a 3D model. As a first step towards understanding the protein, the interactions of mucin and collagen are determined by in silico studies considering that collagen is the most abundant protein in the bone microenvironment. Both proteins are reported to be involved in bone biology though the exact role of mucin is a topic of investigation. The in silico studies of collagen-mucin suggest to have a proper affinity toward each other, forming a strong basis for 3D scaffold development. The developed 3D scaffold is a double network system comprising of mucin and collagen and vinyl end functionalized polyethylene glycol. In situ deposition of mineral crystals has been performed enzymatically. Biological evaluation of these mineral deposited scaffolds is done in terms of their bone regeneration potential and a comparison of the two systems with and without mineral deposition is presented.
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Affiliation(s)
- Debyashreeta Barik
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India.,School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) University, Bhubaneswar, Odisha, 751024, India
| | - Pruthvi Raj Bejugam
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
| | - Chumki Nayak
- Department of Physics, Main Campus, Bose Institute, A. P. C Road, Kolkata, 700009, India
| | | | - Achintya Singha
- Department of Physics, Main Campus, Bose Institute, A. P. C Road, Kolkata, 700009, India
| | - Heidi A Declercq
- Department of Development and Regeneration, Tissue Engineering lab, KU Leuven, E. Sabbelaan 53, Kortrijk, 8500, Belgium
| | - Mamoni Dash
- Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, 751023, India
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Dash P, Piras AM, Dash M. Cell membrane coated nanocarriers - an efficient biomimetic platform for targeted therapy. J Control Release 2020; 327:546-570. [DOI: 10.1016/j.jconrel.2020.09.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/04/2020] [Accepted: 09/06/2020] [Indexed: 01/08/2023]
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12
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Tardajos MG, Cama G, Dash M, Misseeuw L, Gheysens T, Gorzelanny C, Coenye T, Dubruel P. Chitosan functionalized poly-ε-caprolactone electrospun fibers and 3D printed scaffolds as antibacterial materials for tissue engineering applications. Carbohydr Polym 2018; 191:127-135. [DOI: 10.1016/j.carbpol.2018.02.060] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 02/02/2018] [Accepted: 02/20/2018] [Indexed: 01/13/2023]
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Devlaminck DJ, Rahman MM, Dash M, Samal SK, Watté J, Van Vlierberghe S, Dubruel P. Oil-in-water emulsion impregnated electrospun poly(ethylene terephthalate) fiber mat as a novel tool for optical fiber cleaning. J Colloid Interface Sci 2018. [DOI: 10.1016/j.jcis.2018.02.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Christiaens O, Tardajos MG, Martinez Reyna ZL, Dash M, Dubruel P, Smagghe G. Increased RNAi Efficacy in Spodoptera exigua via the Formulation of dsRNA With Guanylated Polymers. Front Physiol 2018; 9:316. [PMID: 29670535 PMCID: PMC5894468 DOI: 10.3389/fphys.2018.00316] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 03/14/2018] [Indexed: 11/23/2022] Open
Abstract
Lepidoptera comprise some of the most devastating herbivorous pest insects worldwide. One of the most promising novel pest control strategies is exploiting the RNA interference (RNAi) mechanism to target essential genes for knockdown and incite toxic effects in the target species without harming other organisms in the ecosystem. However, many insects are refractory to oral RNAi, often due to rapid degradation of ingested dsRNA in their digestive system. This is the case for many lepidopteran insects, including the beet armyworm Spodoptera exigua, which is characterized by a very alkaline gut environment (pH > 9.0) and a strong intestinal nucleolytic activity. In this research, guanidine-containing polymers were developed to protect dsRNA against nucleolytic degradation, specifically in high pH environments. First, their ability to protect dsRNA against nucleolytic degradation in gut juice of the beet armyworm S. exigua was investigated ex vivo. Polymers with high guanidine content provided a strong protection against nucleolytic degradation at pH 11, protecting the dsRNA for up to 30 h. Next, cellular uptake of the dsRNA and the polyplexes in lepidopteran CF203 midgut cells was investigated by confocal microscopy, showing that the polymer also enhanced cellular uptake of the dsRNA. Finally, in vivo feeding RNAi bioassays demonstrated that using these guanidine-containing polymer nanoparticles led to an increased RNAi efficiency in S. exigua. Targeting the essential gene chitin synthase B, we observed that the mortality increased to 53% in the polymer-protected dsRNA treatment compared to only 16% with the naked dsRNA and found that polymer-protected dsRNA completely halted the development of the caterpillars. These results show that using guanylated polymers as a formulation strategy can prevent degradation of dsRNA in the alkaline and strongly nucleolytic gut of lepidopteran insects. Furthermore, the polymer also enhances cellular uptake in lepidopteran midgut cells. This new delivery strategy could be of great use in further fundamental research in lepidopterans, using RNAi as a research tool, and could lead to future applications for RNAi-based pest control of lepidopteran insects.
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Affiliation(s)
- Olivier Christiaens
- Laboratory of Agrozoology, Department of Crop Protection, Ghent University, Ghent, Belgium
| | - Myriam G. Tardajos
- Polymer Biochemistry and Biomaterials Group, Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Gent, Belgium
| | | | - Mamoni Dash
- Polymer Biochemistry and Biomaterials Group, Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Gent, Belgium
| | - Peter Dubruel
- Polymer Biochemistry and Biomaterials Group, Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Gent, Belgium
| | - Guy Smagghe
- Laboratory of Agrozoology, Department of Crop Protection, Ghent University, Ghent, Belgium
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Van Nieuwenhove I, Maji S, Dash M, Van Vlierberghe S, Hoogenboom R, Dubruel P. RAFT/MADIX polymerization of N-vinylcaprolactam in water–ethanol solvent mixtures. Polym Chem 2017. [DOI: 10.1039/c6py02224c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The present paper demonstrates the successful RAFT/MADIX polymerization of N-vinylcaprolactam at ambient temperature in water–ethanol mixtures. An optimum was found for a 1 : 1 ratio of water and ethanol as solvent regarding both polymerization rate and insignificant hydrolysis.
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Affiliation(s)
- Ine Van Nieuwenhove
- Polymer Chemistry and Biomaterials – Group Ghent University
- BE-9000 Ghent
- Belgium
| | - Samarendra Maji
- Supramolecular Chemistry Group – Ghent University
- BE-9000 Ghent
- Belgium
| | - Mamoni Dash
- Polymer Chemistry and Biomaterials – Group Ghent University
- BE-9000 Ghent
- Belgium
| | | | | | - Peter Dubruel
- Polymer Chemistry and Biomaterials – Group Ghent University
- BE-9000 Ghent
- Belgium
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16
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Douglas TEL, Krawczyk G, Pamula E, Declercq HA, Schaubroeck D, Bucko MM, Balcaen L, Van Der Voort P, Bliznuk V, van den Vreken NMF, Dash M, Detsch R, Boccaccini AR, Vanhaecke F, Cornelissen M, Dubruel P. Cover Image, Volume 10, Issue 11. J Tissue Eng Regen Med 2016. [DOI: 10.1002/term.2347] [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: 11/05/2022]
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17
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Dragostin OM, Samal SK, Dash M, Lupascu F, Pânzariu A, Tuchilus C, Ghetu N, Danciu M, Dubruel P, Pieptu D, Vasile C, Tatia R, Profire L. New antimicrobial chitosan derivatives for wound dressing applications. Carbohydr Polym 2016; 141:28-40. [PMID: 26876993 DOI: 10.1016/j.carbpol.2015.12.078] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [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: 05/13/2015] [Revised: 12/28/2015] [Accepted: 12/30/2015] [Indexed: 11/25/2022]
Abstract
Chitosan is a non-toxic, biocompatible, biodegradable natural cationic polymer known for its low imunogenicity, antimicrobial, antioxidant effects and wound-healing activity. To improve its therapeutic potential, new chitosan-sulfonamide derivatives have been designed to develop new wound dressing biomaterials. The structural, morphological and physico-chemical properties of synthesized chitosan derivatives were analyzed by FT-IR, (1)H NMR spectroscopy, scanning electron microscopy, swelling ability and porosity. Antimicrobial, in vivo testing and biodegradation behavior have been also performed. The chitosan derivative membranes showed improved swelling and biodegradation rate, which are important characteristics required for the wound healing process. The antimicrobial assay evidenced that chitosan-based sulfadiazine, sulfadimethoxine and sulfamethoxazole derivatives were the most active. The MTT assay showed that some of chitosan derivatives are nontoxic. Furthermore, the in vivo study on burn wound model induced in Wistar rats demonstrated an improved healing effect and enhanced epithelialization of chitosan-sulfonamide derivatives compared to neat chitosan. The obtained results strongly recommend the use of some of the newly developed chitosan derivatives as antimicrobial wound dressing biomaterials.
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Affiliation(s)
- Oana Maria Dragostin
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy "Grigore T. Popa" Iasi, 16 University Street, 700115 Iasi, Romania
| | - Sangram Keshari Samal
- Laboratory of General Biochemistry and Physical Pharmacy, Centre for Nano- and Biophotonics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Mamoni Dash
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281, S4-Bis, B-9000 Ghent, Belgium
| | - Florentina Lupascu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy "Grigore T. Popa" Iasi, 16 University Street, 700115 Iasi, Romania
| | - Andreea Pânzariu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy "Grigore T. Popa" Iasi, 16 University Street, 700115 Iasi, Romania
| | - Cristina Tuchilus
- Department of Microbiology, Faculty of Medicine, University of Medicine and Pharmacy "Grigore T. Popa" Iasi, 16 University Street, 700115 Iasi, Romania
| | - Nicolae Ghetu
- Department of Plastic Surgery, Faculty of Medicine, University of Medicine and Pharmacy "Grigore T. Popa" Iasi, 16 University Street, 700115 Iasi, Romania
| | - Mihai Danciu
- Department of Morphopathology, Faculty of Medicine, University of Medicine and Pharmacy "Grigore T. Popa" Iasi, 16 University Street, 700115 Iasi, Romania
| | - Peter Dubruel
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281, S4-Bis, B-9000 Ghent, Belgium
| | - Dragos Pieptu
- Department of Plastic Surgery, Faculty of Medicine, University of Medicine and Pharmacy "Grigore T. Popa" Iasi, 16 University Street, 700115 Iasi, Romania
| | - Cornelia Vasile
- Department of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Rodica Tatia
- National Institute of Research and Development for Biological Sciences, 296 Splaiul Independentei, 060031 Bucharest, Romania
| | - Lenuta Profire
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy "Grigore T. Popa" Iasi, 16 University Street, 700115 Iasi, Romania.
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Samal SK, Goranov V, Dash M, Russo A, Shelyakova T, Graziosi P, Lungaro L, Riminucci A, Uhlarz M, Bañobre-López M, Rivas J, Herrmannsdörfer T, Rajadas J, De Smedt S, Braeckmans K, Kaplan DL, Dediu VA. Multilayered Magnetic Gelatin Membrane Scaffolds. ACS Appl Mater Interfaces 2015; 7:23098-109. [PMID: 26451743 PMCID: PMC4867029 DOI: 10.1021/acsami.5b06813] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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: 05/08/2023]
Abstract
A versatile approach for the design and fabrication of multilayer magnetic scaffolds with tunable magnetic gradients is described. Multilayer magnetic gelatin membrane scaffolds with intrinsic magnetic gradients were designed to encapsulate magnetized bioagents under an externally applied magnetic field for use in magnetic-field-assisted tissue engineering. The temperature of the individual membranes increased up to 43.7 °C under an applied oscillating magnetic field for 70 s by magnetic hyperthermia, enabling the possibility of inducing a thermal gradient inside the final 3D multilayer magnetic scaffolds. On the basis of finite element method simulations, magnetic gelatin membranes with different concentrations of magnetic nanoparticles were assembled into 3D multilayered scaffolds. A magnetic-gradient-controlled distribution of magnetically labeled stem cells was demonstrated in vitro. This magnetic biomaterial-magnetic cell strategy can be expanded to a number of different magnetic biomaterials for various tissue engineering applications.
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Affiliation(s)
- Sangram K. Samal
- Spintronic Devices Division, Institute for Nanostructured Materials ISMN-CNR, Via Gobetti 101, 40129 Bologna, Italy
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Vitaly Goranov
- Spintronic Devices Division, Institute for Nanostructured Materials ISMN-CNR, Via Gobetti 101, 40129 Bologna, Italy
| | - Mamoni Dash
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281, S4-Bis, B-9000 Ghent, Belgium
| | - Alessandro Russo
- Laboratory of Biomechanics and Technology Innovation, NABI, Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Tatiana Shelyakova
- Laboratory of Biomechanics and Technology Innovation, NABI, Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Patrizio Graziosi
- Spintronic Devices Division, Institute for Nanostructured Materials ISMN-CNR, Via Gobetti 101, 40129 Bologna, Italy
| | - Lisa Lungaro
- Spintronic Devices Division, Institute for Nanostructured Materials ISMN-CNR, Via Gobetti 101, 40129 Bologna, Italy
- Osteoarticular Research Group, Centre for Genomic and Experimental Medicine, The University of Edinburgh, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, United Kingdom
| | - Alberto Riminucci
- Spintronic Devices Division, Institute for Nanostructured Materials ISMN-CNR, Via Gobetti 101, 40129 Bologna, Italy
| | - Marc Uhlarz
- Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Manuel Bañobre-López
- International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - Jose Rivas
- Department of Applied Physics, Faculty of Physics, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Thomas Herrmannsdörfer
- Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Jayakumar Rajadas
- Biomaterials and Advanced Drug Delivery Laboratory, Cardiovascular Pharmacology Division, Stanford Cardiovascular Institute, Stanford University, 1050 Arastradero, Palo Alto, California 94304, United States
| | - Stefaan De Smedt
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Kevin Braeckmans
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
- Corresponding Authors (D.L.K.) Tel.: +16176270851. Fax: +16176273231. . (V.A.D.),
| | - V. Alek Dediu
- Spintronic Devices Division, Institute for Nanostructured Materials ISMN-CNR, Via Gobetti 101, 40129 Bologna, Italy
- Corresponding Authors (D.L.K.) Tel.: +16176270851. Fax: +16176273231. . (V.A.D.),
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Dash M, Samal SK, Douglas TEL, Schaubroeck D, Leeuwenburgh SC, Van Der Voort P, Declercq HA, Dubruel P. Enzymatically biomineralized chitosan scaffolds for tissue-engineering applications. J Tissue Eng Regen Med 2015; 11:1500-1513. [DOI: 10.1002/term.2048] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 04/14/2015] [Accepted: 04/29/2015] [Indexed: 01/30/2023]
Affiliation(s)
- Mamoni Dash
- Polymer Chemistry and Biomaterials Research Group; Ghent University; Krijgslaan 281, S4-Bis B-9000 Ghent Belgium
| | - Sangram K. Samal
- Polymer Chemistry and Biomaterials Research Group; Ghent University; Krijgslaan 281, S4-Bis B-9000 Ghent Belgium
- Laboratory of General Biochemistry and Physical Pharmacy; Ghent University; Harelbekestraat 72 9000 Ghent Belgium
- Centre for Nano- and Biophotonics; Ghent University; Harelbekestraat 72 9000 Ghent Belgium
| | - Timothy E. L. Douglas
- Polymer Chemistry and Biomaterials Research Group; Ghent University; Krijgslaan 281, S4-Bis B-9000 Ghent Belgium
| | - David Schaubroeck
- Centre for Microsystems Technology (CMST); Imec and Ghent University; Technologiepark 914a 9052 Ghent Belgium
| | - Sander C. Leeuwenburgh
- Department of Biomaterials; Radboud University Medical Centre; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Pascal Van Der Voort
- Department of Inorganic Chemistry, COMOC; Ghent University; Krijgslaan 281 S3 9000 Ghent Belgium
| | - Heidi A. Declercq
- Department of Basic Medical Sciences, Tissue Engineering Group; Ghent University; De Pintelaan 185 (6B3) 9000 Ghent Belgium
| | - Peter Dubruel
- Polymer Chemistry and Biomaterials Research Group; Ghent University; Krijgslaan 281, S4-Bis B-9000 Ghent Belgium
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Lupascu FG, Dash M, Samal SK, Dubruel P, Lupusoru CE, Lupusoru RV, Dragostin O, Profire L. Development, optimization and biological evaluation of chitosan scaffold formulations of new xanthine derivatives for treatment of type-2 diabetes mellitus. Eur J Pharm Sci 2015; 77:122-34. [PMID: 26079402 DOI: 10.1016/j.ejps.2015.06.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 06/04/2015] [Accepted: 06/12/2015] [Indexed: 12/11/2022]
Abstract
New xanthine derivatives as antidiabetic agents were synthesized and new chitosan formulations have been developed in order to improve their biological and pharmacokinetic profile. Their physicochemical properties in terms of particle size, morphology, swelling degree, crystalline state, the loading efficiency as well as in vitro release and biodegradation rate were evaluated. According to the results the optimized formulations have a high drug loading efficiency (more than 70%), small particle size, a good release profile in the simulated biological fluids (the percentage of cumulative release being more than 55%) and improved biodegradation rate in reference with chitosan microparticles. The presence of xanthine derivatives (6, 7) in chitosan microparticles was demonstrated by means of FTIR analysis. The X-ray diffraction (XRD) proved that xanthine derivatives present a crystalline state. The biological evaluation assays confirmed the antioxidant and antidiabetic effects of the xanthine derivatives (6, 7) and their chitosan formulations (CS-6, CS-7). Xanthine derivative 6 showed a high antiradical scavenging effect (DPPH remaining=41.78%). It also reduced the glucose blood level with 59.30% and recorded level of glycosylated hemoglobin was 4.53%. The effect of its chitosan formulation (CS-6) on the level of blood glucose (114.5mg/dl) was even more intense than the one recorded by pioglitazone (148.5mg/dl) when used as standard antidiabetic drug. These results demonstrated the potential application of xanthine derivative 6 and its chitosan formulation (CS-6) in the treatment of the diabetes mellitus syndrome.
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Affiliation(s)
- Florentina Geanina Lupascu
- University of Medicine and Pharmacy "Grigore T. Popa", Faculty of Pharmacy, University 16, 700115 Iasi, Romania.
| | - Mamoni Dash
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281, S4-Bis, B-9000 Ghent, Belgium.
| | - Sangram Keshari Samal
- Laboratory of General Biochemistry and Physical Pharmacy, Centre for Nano- and Biophotonics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Peter Dubruel
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281, S4-Bis, B-9000 Ghent, Belgium.
| | - Catalina Elena Lupusoru
- University of Medicine and Pharmacy "Grigore T. Popa", Faculty of Medicine, University 16, 700115 Iasi, Romania.
| | - Raoul-Vasile Lupusoru
- University of Medicine and Pharmacy "Grigore T. Popa", Faculty of Medicine, University 16, 700115 Iasi, Romania.
| | - Oana Dragostin
- University of Medicine and Pharmacy "Grigore T. Popa", Faculty of Pharmacy, University 16, 700115 Iasi, Romania.
| | - Lenuta Profire
- University of Medicine and Pharmacy "Grigore T. Popa", Faculty of Pharmacy, University 16, 700115 Iasi, Romania.
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Samal SK, Dash M, Shelyakova T, Declercq HA, Uhlarz M, Bañobre-López M, Dubruel P, Cornelissen M, Herrmannsdörfer T, Rivas J, Padeletti G, De Smedt S, Braeckmans K, Kaplan DL, Dediu VA. Biomimetic magnetic silk scaffolds. ACS Appl Mater Interfaces 2015; 7:6282-92. [PMID: 25734962 DOI: 10.1021/acsami.5b00529] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [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: 05/16/2023]
Abstract
Magnetic silk fibroin protein (SFP) scaffolds integrating magnetic materials and featuring magnetic gradients were prepared for potential utility in magnetic-field assisted tissue engineering. Magnetic nanoparticles (MNPs) were introduced into SFP scaffolds via dip-coating methods, resulting in magnetic SFP scaffolds with different strengths of magnetization. Magnetic SFP scaffolds showed excellent hyperthermia properties achieving temperature increases up to 8 °C in about 100 s. The scaffolds were not toxic to osteogenic cells and improved cell adhesion and proliferation. These findings suggest that tailored magnetized silk-based biomaterials can be engineered with interesting features for biomaterials and tissue-engineering applications.
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Affiliation(s)
- Sangram K Samal
- †Consiglio Nazionale delle Ricerche-Institute for Nanostructured Materials, I-40129 Bologna-Roma, Italy
- ‡Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
- §Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | | | - Tatiana Shelyakova
- ⊥Laboratory of Biomechanics and Technology Innovation, NABI, Rizzoli Orthopaedic Institute, 40136 Bologna, Italy
| | - Heidi A Declercq
- #Department of Basic Medical Science - Tissue Engineering Group, Ghent University, De Pintelaan 185 (6B3), 9000 Ghent, Belgium
| | - Marc Uhlarz
- ∇Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Manuel Bañobre-López
- ○International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | | | - Maria Cornelissen
- #Department of Basic Medical Science - Tissue Engineering Group, Ghent University, De Pintelaan 185 (6B3), 9000 Ghent, Belgium
| | - Thomas Herrmannsdörfer
- ∇Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Jose Rivas
- ○International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga, 4715-330 Braga, Portugal
| | - Giuseppina Padeletti
- †Consiglio Nazionale delle Ricerche-Institute for Nanostructured Materials, I-40129 Bologna-Roma, Italy
| | - Stefaan De Smedt
- §Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Kevin Braeckmans
- §Laboratory of General Biochemistry and Physical Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - David L Kaplan
- ‡Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - V Alek Dediu
- †Consiglio Nazionale delle Ricerche-Institute for Nanostructured Materials, I-40129 Bologna-Roma, Italy
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Abstract
Trichosporon species are widely distributed in nature and can occasionally belong to the human microbiota. For many years, Trichosporon beigelii, the only species of this genus, was found as the aetiological agent of superficial skin infection called white piedra. However, many cases of invasive trichosporonosis caused by different newly delineated species of Trichosporon have been published in increasing numbers in recent past years, especially in immunocompromised persons. We report a rare case of fungemia due to Trichosporon mucoides in a diabetes mellitus patient, which will add to the emerging list of trichosporonosis infections.
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Affiliation(s)
- S Padhi
- Department of Microbiology, Maharaja Krishna Chandra Gajapati Medical College and Hospital, Berhampur, Odisha, India
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Abstract
Tuberculosis (TB) is responsible for 1.4 million deaths annually. Wide-spread misuse of anti-tubercular drugs over three decades has resulted in emergence of drug resistant TB including multidrug-resistant TB and extensively drug-resistant TB globally. Accurate and rapid diagnosis of drug-resistant TB is one of the paramount importance for instituting appropriate clinical management and infection control measures. The present article provides an overview of the various diagnostic options available for drug resistant TB, by searching PubMed for recent articles. Rapid phenotypic tests still requires days to weeks to obtain final results, requiring biosafety and quality control measures. For newly developed molecular methods, infrastructure, training and quality assurance should be followed. Successful control of drug resistant TB globally will depend upon strengthening TB control programs, wider access to rapid diagnosis and provision of effective treatment. Therefore, political and fund provider commitment is essential to curb the spread of drug resistant TB.
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Affiliation(s)
- M Dash
- Department of Microbiology, Maharaja Krishna Chandra Gajapati Medical College and Hospital, Berhampur, Odisha, India
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Dash M, Samal SK, Bartoli C, Morelli A, Smet PF, Dubruel P, Chiellini F. Biofunctionalization of ulvan scaffolds for bone tissue engineering. ACS Appl Mater Interfaces 2014; 6:3211-3218. [PMID: 24494863 DOI: 10.1021/am404912c] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Photo-cross-linked ulvan scaffolds were designed with the aim to induce and support enzyme mediated formation of apatite minerals, in the absence of osteogenic growth factors. Scaffold formation with a desired geometry was investigated using chemically modified ulvan bearing radically polymerizable groups. Further bioactivity was incorporated by the use of alkaline phosphatase (ALP) induced minerals. Successful modification of UV cross-linked ulvan scaffolds was revealed by (1)H NMR. The presence of the mineral formation was evidenced by Raman spectroscopy and XRD techniques. Investigations of the morphology confirmed the homogeneous mineralization using ALP. The MC3T3 cell activity clearly showed that the mineralization of the biofunctionalized ulvan scaffolds was effective in improving the cellular activity.
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Affiliation(s)
- Mamoni Dash
- Polymer Chemistry & Biomaterials Research Group, Ghent University , Krijgslaan 281, S4-Bis, B-9000 Ghent, Belgium
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Samal SK, Dash M, Declercq HA, Gheysens T, Dendooven J, Van Der Voort P, Cornelissen R, Dubruel P, Kaplan DL. Enzymatic mineralization of silk scaffolds. Macromol Biosci 2014; 14:991-1003. [PMID: 24610728 DOI: 10.1002/mabi.201300513] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Indexed: 01/17/2023]
Abstract
The present study focuses on the alkaline phosphatase (ALP) mediated formation of apatitic minerals on porous silk fibroin protein (SFP) scaffolds. Porous SFP scaffolds impregnated with different concentrations of ALP are homogeneously mineralized under physiological conditions. The mineral structure is apatite while the structures differ as a function of the ALP concentration. Cellular adhesion, proliferation, and colonization of osteogenic MC3T3 cells improve on the mineralized SFP scaffolds. These findings suggest a simple process to generate mineralized scaffolds that can be used to enhanced bone tissue engineering-related utility.
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Affiliation(s)
- Sangram K Samal
- Polymer Chemistry and Biomaterials Research Group, Department of Organic Chemistry, Ghent University, Krijgslaan 281/S4-Bis, B-9000, Ghent, Belgium; Department of Biomedical Engineering, 4 Colby Street, Tufts University, Medford, MA, 02155, USA.
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Dash M, Padhi S, Sahu S, Mohanty I, Panda P, Parida B, Sahoo MK. HIV counseling and testing in a tertiary care hospital in Ganjam district, Odisha, India. J Postgrad Med 2014; 59:110-4. [PMID: 23793311 DOI: 10.4103/0022-3859.113831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Human immunodeficiency virus (HIV) counseling and testing (HCT) conducted at integrated counseling and testing centers (ICTCs) is an entry point, cost-effective intervention in preventing transmission of HIV. OBJECTIVES To study the prevalence of HIV among ICTC attendees, sociodemographic characteristics, and risk behaviors of HIV-seropositive clients. MATERIALS AND METHODS It was hospital record-based cross-sectional study of 26,518 registered ICTC clients at a tertiary care hospital in Ganjam district, Odisha, India over a 4-year period from January 2009 to September 2012. RESULTS A total of 1732 (7.5%) out of 22,897 who were tested for HIV were seropositive. Among HIV-seropositives, 1138 (65.7%) were males, while 594 (34.3%) were females. Majority (88.3%) of seropositives were between the age group of 15-49 years. Client-initiated HIV testing (12.1%) was more seropositive compared to provider-initiated (2.9%). Among discordant couples, majority (95.5%) were male partner/husband positive and female partner/wife negative. Positives were more amongst married, less educated, low socioeconomic status, and outmigrants (P<0.0001). Risk factors included heterosexual promiscuous (89.3%), parent-to-child transmission 5.8%, unknown 3.1%, infected blood transfusion 0.8%, homosexual 0.5%, and infected needles (0.5%). CONCLUSIONS There is need to encourage activities that promote HCT in all health facilities. This will increase the diagnosis of new HIV cases. The data generated in ICTC provide an important clue to understand the epidemiology in a particular geographic region and local planning for care and treatment of those infected with HIV and preventive strategies for those at risk especially married, young adults, and outmigrants to reduce new infections.
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Affiliation(s)
- M Dash
- Department of Microbiology, Maharaja Krushna Chandra Gajapati Medical College and Hospital, Berhampur University, Berhampur, Odisha, India
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Sahu SK, Padhy S, Dash M, Mohanty I, Pattnaik S. A Rare case of Subcutaneous Mycosis due to Rhizoctonia solani. Bangladesh J Med Sci 2014. [DOI: 10.3329/bjms.v13i2.15060] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Rhizoctonia solani is a very common soil borne pathogen with a great diversity of host plants. A 52 year old lady presented with sole manifestation of subcutaneous swelling over the left leg for 3 months Pus was collected by aspiration revealed septate fungal hyphae. After culture on SDA at 25 C showed white cottony growth initially, progressed to buff colored to black colonies on further incubation. On LPCB mount we found septate hyphae with acute and right angled branching without any conidia and hyphal anastomosis which resembled features of Rhizoctonia solani. Patient was put on Fluconazole and responded well to the treatment. DOI: http://dx.doi.org/10.3329/bjms.v13i2.15060 Bangladesh Journal of Medical Science Vol.13(2) 2014 p.228-230
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Douglas TEL, Krawczyk G, Pamula E, Declercq HA, Schaubroeck D, Bucko MM, Balcaen L, Van Der Voort P, Bliznuk V, van den Vreken NMF, Dash M, Detsch R, Boccaccini AR, Vanhaecke F, Cornelissen M, Dubruel P. Generation of composites for bone tissue-engineering applications consisting of gellan gum hydrogels mineralized with calcium and magnesium phosphate phases by enzymatic means. J Tissue Eng Regen Med 2014; 10:938-954. [PMID: 24616374 DOI: 10.1002/term.1875] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 11/06/2013] [Accepted: 01/07/2014] [Indexed: 12/22/2022]
Abstract
Mineralization of hydrogels, desirable for bone regeneration applications, may be achieved enzymatically by incorporation of alkaline phosphatase (ALP). ALP-loaded gellan gum (GG) hydrogels were mineralized by incubation in mineralization media containing calcium and/or magnesium glycerophosphate (CaGP, MgGP). Mineralization media with CaGP:MgGP concentrations 0.1:0, 0.075:0.025, 0.05:0.05, 0.025:0.075 and 0:0.1 (all values mol/dm3 , denoted A, B, C, D and E, respectively) were compared. Mineral formation was confirmed by IR and Raman, SEM, ICP-OES, XRD, TEM, SAED, TGA and increases in the the mass fraction of the hydrogel not consisting of water. Ca was incorporated into mineral to a greater extent than Mg in samples mineralized in media A-D. Mg content and amorphicity of mineral formed increased in the order A < B < C < D. Mineral formed in media A and B was calcium-deficient hydroxyapatite (CDHA). Mineral formed in medium C was a combination of CDHA and an amorphous phase. Mineral formed in medium D was an amorphous phase. Mineral formed in medium E was a combination of crystalline and amorphous MgP. Young's moduli and storage moduli decreased in dependence of mineralization medium in the order A > B > C > D, but were significantly higher for samples mineralized in medium E. The attachment and vitality of osteoblastic MC3T3-E1 cells were higher on samples mineralized in media B-E (containing Mg) than in those mineralized in medium A (not containing Mg). All samples underwent degradation and supported the adhesion of RAW 264.7 monocytic cells, and samples mineralized in media A and B supported osteoclast-like cell formation. Copyright © 2014 John Wiley & Sons, Ltd.
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Affiliation(s)
- Timothy E L Douglas
- Polymer Chemistry and Biomaterials (PBM) Group, Department of Organic Chemistry, Ghent University, Belgium
| | - Grzegorz Krawczyk
- Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland
| | - Elzbieta Pamula
- Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland
| | - Heidi A Declercq
- Department of Basic Medical Science - Histology Group, Ghent University, Belgium
| | - David Schaubroeck
- Centre for Microsystems Technology (CMST), ELIS, Imec, Ghent, Belgium
| | - Miroslaw M Bucko
- Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland
| | - Lieve Balcaen
- Department of Analytical Chemistry, Ghent University, Belgium
| | | | - Vitaliy Bliznuk
- Department of Materials Science and Engineering, Zwijnaarde, Belgium
| | | | - Mamoni Dash
- Polymer Chemistry and Biomaterials (PBM) Group, Department of Organic Chemistry, Ghent University, Belgium
| | - Rainer Detsch
- Department of Materials Science and Engineering, Institute of Biomaterials (WW7), University of Erlangen-Nuremberg, Erlangen, Germany
| | - Aldo R Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials (WW7), University of Erlangen-Nuremberg, Erlangen, Germany
| | - Frank Vanhaecke
- Department of Analytical Chemistry, Ghent University, Belgium
| | - Maria Cornelissen
- Department of Basic Medical Science - Histology Group, Ghent University, Belgium
| | - Peter Dubruel
- Polymer Chemistry and Biomaterials (PBM) Group, Department of Organic Chemistry, Ghent University, Belgium
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Samal SK, Dash M, Chiellini F, Wang X, Chiellini E, Declercq HA, Kaplan DL. Silk/chitosan biohybrid hydrogels and scaffolds via green technology. RSC Adv 2014. [DOI: 10.1039/c4ra10070k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A green technology approach towards conjugation of biopolymers for designing biohybrid silk/chitosan based biomaterials for therapeutic applications.
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Affiliation(s)
- Sangram K. Samal
- BioLab-UdR-INSTM
- University of Pisa
- Pisa – 1291, Italy
- Department of Biomedical Engineering
- Tufts University
| | - Mamoni Dash
- BioLab-UdR-INSTM
- University of Pisa
- Pisa – 1291, Italy
- Polymer Chemistry & Biomaterials Research Group
- Ghent University
| | | | - Xiaoqin Wang
- Department of Biomedical Engineering
- Tufts University
- Medford, USA
| | - Emo Chiellini
- BioLab-UdR-INSTM
- University of Pisa
- Pisa – 1291, Italy
| | - Heidi A. Declercq
- Department of Basic Medical Sciences – Tissue Engineering Group
- Ghent University
- 9000 Ghent, Belgium
| | - David L. Kaplan
- Department of Biomedical Engineering
- Tufts University
- Medford, USA
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Mohapatra RK, Dash M, Mishra UK, Mahapatra A, Dash DC. Synthesis, Spectral Characterization, and Fungicidal Activity of Transition Metal Complexes With Benzimidazolyl-2-hydrazones of Glyoxal, Diacetyl, and Benzil. ACTA ACUST UNITED AC 2013. [DOI: 10.1080/15533174.2013.776592] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- R. K. Mohapatra
- a Department of Chemistry , Govt. College of Engineering , Keonjhar , Odisha , India
| | - M. Dash
- a Department of Chemistry , Govt. College of Engineering , Keonjhar , Odisha , India
| | - U. K. Mishra
- b School of Chemistry , Sambalpur University , Jyoti Vihar, Burla, Sambalpur , Odisha , India
| | - A. Mahapatra
- b School of Chemistry , Sambalpur University , Jyoti Vihar, Burla, Sambalpur , Odisha , India
| | - D. C. Dash
- b School of Chemistry , Sambalpur University , Jyoti Vihar, Burla, Sambalpur , Odisha , India
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Abstract
Dipylidiasis is a zoonotic parasitic infestation caused by the dog tapeworm Dipylidium caninum. Human dipylidiasis has been rarely reported in English literature. Young children are mostly at risk of acquiring the infection due to their close association with dogs and cats. We report a rare case of Dipylidium caninum infection in a 4 year old male child. The diagnosis was based on microscopic examination of stool. Confirmation of the proglottid segments was done by histopathological examination. To the best of our knowledge this is the first human case of Dipylidium caninum reported from this part of the country.
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Affiliation(s)
- M V Narasimham
- Department of Microbiology, MKCG Medical College Berhampur, Odisha, India
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Samal SK, Dash M, Chiellini F, Kaplan DL, Chiellini E. Silk microgels formed by proteolytic enzyme activity. Acta Biomater 2013; 9:8192-9. [PMID: 23756227 DOI: 10.1016/j.actbio.2013.05.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 02/17/2013] [Revised: 05/05/2013] [Accepted: 05/16/2013] [Indexed: 01/19/2023]
Abstract
The proteolytic enzyme α-chymotrypsin selectively cleaves the amorphous regions of silk fibroin protein (SFP) and allows the crystalline regions to self-assemble into silk microgels (SMGs) at physiological temperature. These microgels consist of lamellar crystals in the micrometer scale, in contrast to the nanometer-scaled crystals in native silkworm fibers. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and zeta potential results demonstrated that α-chymotrypsin utilized only the non-amorphous domains or segments of the heavy chain of SFP to form negatively charged SMGs. The SMGs were characterized in terms of size, charge, structure, morphology, crystallinity, swelling kinetics, water content and thermal properties. The results suggest that the present technique of preparing SMGs by α-chymotrypsin is simple and efficient, and that the prepared SMGs have useful features for studies related to biomaterial and pharmaceutical needs. This process is also an easy way to obtain the amorphous peptide chains for further study.
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Affiliation(s)
- Sangram K Samal
- BioLab-UdR-INSTM, Via Vecchia Livornese, University of Pisa, Pisa 1291, Italy
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Samal SK, Dash M, Van Vlierberghe S, Kaplan DL, Chiellini E, van Blitterswijk C, Moroni L, Dubruel P. Cationic polymers and their therapeutic potential. Chem Soc Rev 2012; 41:7147-94. [PMID: 22885409 DOI: 10.1039/c2cs35094g] [Citation(s) in RCA: 459] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The last decade has witnessed enormous research focused on cationic polymers. Cationic polymers are the subject of intense research as non-viral gene delivery systems, due to their flexible properties, facile synthesis, robustness and proven gene delivery efficiency. Here, we review the most recent scientific advances in cationic polymers and their derivatives not only for gene delivery purposes but also for various alternative therapeutic applications. An overview of the synthesis and preparation of cationic polymers is provided along with their inherent bioactive and intrinsic therapeutic potential. In addition, cationic polymer based biomedical materials are covered. Major progress in the fields of drug and gene delivery as well as tissue engineering applications is summarized in the present review.
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Affiliation(s)
- Sangram Keshari Samal
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281, S4-Bis, B-9000 Ghent, Belgium.
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Esen S, Schwartz AJ, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Aziz T, Bakich AM, Balagura V, Barberio E, Bay A, Bischofberger M, Bondar A, Bozek A, Bračko M, Browder TE, Chang MC, Chang P, Chen A, Chen P, Cheon BG, Chiang CC, Choi Y, Dalseno J, Dash M, Doležal Z, Drásal Z, Drutskoy A, Eidelman S, Goldenzweig P, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Higuchi T, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Inami K, Itoh R, Iwabuchi M, Joshi NJ, Julius T, Kang JH, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim JH, Kim YJ, Kinoshita K, Ko BR, Kodyš P, Korpar S, Križan P, Krokovny P, Kuhr T, Kumita T, Kwon YJ, Kyeong SH, Lange JS, Lee SH, Liu Y, Liventsev D, Louvot R, Matyja A, McOnie S, Miyata H, Mizuk R, Mohanty GB, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Neubauer S, Nishida S, Nitoh O, Ohshima T, Okuno S, Olsen SL, Pakhlov P, Park CW, Park H, Park HK, Petrič M, Piilonen LE, Röhrken M, Ryu S, Sahoo H, Sakai Y, Schneider O, Schwanda C, Senyo K, Sevior ME, Shapkin M, Shen CP, Shiu JG, Smerkol P, Solovieva E, Starič M, Sumisawa K, Sumiyoshi T, Teramoto Y, Trabelsi K, Uehara S, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Vervink K, Wang CH, Wang MZ, Wang P, Watanabe Y, Wedd R, Wicht J, Won E, Yabsley BD, Yamashita Y, Zhang ZP, Zhilich V, Zupanc A. Observation of B(s)(0) → D(s)(*)+ D(s)(*)- using e+ e- collisions and a determination of the B(s)-B(s) width difference ΔΓ(s). Phys Rev Lett 2010; 105:201802. [PMID: 21231220 DOI: 10.1103/physrevlett.105.201802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2010] [Indexed: 05/30/2023]
Abstract
We have made the first observation of B(s)(0)→D(s)(*)+ D(s)(*)- decays using 23.6 fb(-1) of data recorded by the Belle experiment running on the Υ(5S) resonance. The branching fractions are measured to be B(B(s)(0)→D(s)+ D(s)-)=(1.03(-0.32-0.25)(+0.39+0.26))%, B(B(s)(0)→D(s)(*±) D(s)(∓))=(2.75(-0.71)(+0.83)±0.69)%, and B(B(s)(0)→D(s)*+ D(s)*-)=(3.08(-1.04-0.86)(+1.22+0.85))%; the sum is B[B(s)(0)→D(s)(*)+ D(s)(*)-]=(6.85(-1.30-1.80)(+1.53+1.79))%. Assuming B(s)(0)→D(s)(*)+ D(s)(*)- saturates decays to CP-even final states, the branching fraction determines the ratio ΔΓ(s)/cosφ, where ΔΓ(s) is the difference in widths between the two B(s)-B(s) mass eigenstates, and φ is a CP-violating weak phase. Taking CP violation to be negligibly small, we obtain ΔΓ(s)/Γ(s)=0.147(-0.030)(+0.036)(stat)(-0.041)(+0.042)(syst), where Γ(s) is the mean decay width.
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Affiliation(s)
- S Esen
- University of Cincinnati, Cincinnati, Ohio 45221, USA
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Hyun HJ, Park HK, Kim HO, Park H, Aihara H, Arinstein K, Aushev T, Bakich AM, Barberio E, Bay A, Belous K, Bischofberger M, Bondar A, Bozek A, Bracko M, Chang MC, Chang P, Chao Y, Chen A, Chen P, Cheon BG, Cho IS, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Golob B, Ha H, Hara T, Horii Y, Hoshi Y, Hou WS, Hsiung YB, Inami K, Iwasaki Y, Joshi NJ, Kah DH, Kang JH, Kapusta P, Kawasaki T, Kichimi H, Kiesling C, Kim HJ, Kim JH, Kim MJ, Ko BR, Kodys P, Krizan P, Kuzmin A, Kwon YJ, Kyeong SH, Lange JS, Lee SH, Li J, Liventsev D, Louvot R, Matyja A, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mohanty GB, Nakano E, Nakazawa H, Nishida S, Nishimura K, Nitoh O, Ohshima T, Okuno S, Olsen SL, Palka H, Park CW, Pestotnik R, Petric M, Piilonen LE, Ryu S, Sahoo H, Sakai Y, Schneider O, Sevior ME, Shapkin M, Shiu JG, Shwartz B, Singh JB, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Teramoto Y, Trabelsi K, Uehara S, Unno Y, Uno S, Varner G, Varvell KE, Vervink K, Wang CH, Wang MZ, Wang P, Wang XL, Wedd R, Won E, Yabsley BD, Yamashita Y, Zhang ZP, Zhilich V, Zyukova O. Search for a low mass particle decaying into μ+ μ- in B0 → K*0 X and B0 → ρ0 X at Belle. Phys Rev Lett 2010; 105:091801. [PMID: 20868151 DOI: 10.1103/physrevlett.105.091801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2010] [Indexed: 05/29/2023]
Abstract
We search for dimuon decays of a low mass particle in the decays B0→K*0 X and B0→ρ0 X using a data sample of 657×10(6)BB events collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. We find no evidence for such a particle in the mass range from 212 MeV/c2 to 300 MeV/c2 for lifetimes below 10(-12) s, and set upper limits on its branching fractions. In particular, we search for a particle with a mass of 214.3 MeV/c2 reported by the HyperCP experiment, and obtain upper limits on the products B(B0→K*0 X)×B(X→μ+ μ- )<2.26(2.27)×10(-8) and B(B0→ρ0 X)×B(X→μ+ μ-)<1.73(1.73)×10(-8) at 90% C.L. for a scalar (vector) X particle.
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Affiliation(s)
- H J Hyun
- Kyungpook National University, Taegu
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Louvot R, Schneider O, Aushev T, Arinstein K, Bakich AM, Balagura V, Barberio E, Bay A, Belous K, Bischofberger M, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen P, Cheon BG, Chiang CC, Cho IS, Choi Y, Danilov M, Dash M, Drutskoy A, Eidelman S, Goldenzweig P, Golob B, Ha H, Haba J, Hara T, Horii Y, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Inami K, Itoh R, Iwabuchi M, Iwasaki M, Iwasaki Y, Joshi NJ, Kah DH, Kang JH, Kapusta P, Katayama N, Kawasaki T, Kiesling C, Kim HJ, Kim HO, Kim JH, Kim MJ, Kim YJ, Kinoshita K, Ko BR, Kodys P, Korpar S, Krizan P, Krokovny P, Kumita T, Kwon YJ, Kyeong SH, Lange JS, Lee MJ, Lee SH, Li J, Liu C, Matyja A, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mohanty GB, Nakao M, Nakazawa H, Nishida S, Nishimura K, Nitoh O, Ohshima T, Okuno S, Olsen SL, Pakhlov P, Pakhlova G, Palka H, Park H, Park HK, Pestotnik R, Petric M, Piilonen LE, Poluektov A, Prim M, Röhrken M, Ryu S, Sahoo H, Sakai Y, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shebalin V, Shen CP, Shiu JG, Singh JB, Smerkol P, Sokolov A, Stanic S, Staric M, Sumiyoshi T, Taylor GN, Teramoto Y, Trabelsi K, Uehara S, Unno Y, Uno S, Varner G, Varvell KE, Vervink K, Wang CH, Wang MZ, Wang P, Wicht J, Won E, Yabsley BD, Yamashita Y, Zhang ZP, Zivko T, Zyukova O. Observation of B(s)(0) → D(s)(*-) π+ and B(s)(0) → D(s)(*-) ρ+ and measurement of the B(s)(0) → D(s)(*-) ρ+ longitudinal polarization fraction. Phys Rev Lett 2010; 104:231801. [PMID: 20867227 DOI: 10.1103/physrevlett.104.231801] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2010] [Indexed: 05/29/2023]
Abstract
First observations of the B(s)(0) → D(s)(*-) π+, B(s)(0) → D(s)(-) ρ+ and B(s)(0) → D(s)(*-) ρ+ decays are reported together with measurements of their branching fractions: B(B(s)(0) → D(s)(*-) π+) = [2.4(-0.4)(+0.5)(stat) ± 0.3(syst) ± 0.4(f(s))]×10(-3), B(B(s)(0) → D(s)(-) ρ+) = [8.5(-1.2)(+1.3)(stat) ± 1.1(syst) ± 1.3(f(s))]×10(-3) and B(B(s)(0) → D(s)(*-) ρ+) = [11.9(-2.0)(+2.2)(stat) ± 1.7(syst) ± 1.8(f(s))]×10(-3) (f(s) = N(B(s)(*) B(s)(*))/N(bb)). From helicity-angle distributions, we measured the longitudinal polarization fraction in B(s)(0) → D(s)(*-) ρ+ decays to be f(L)(B(s)(0) → D(s)(*-) ρ+) = 1.05(-0.10)(+0.08)(stat)(-0.04)(+0.03)(syst). These results are based on a 23.6 fb(-1) data sample collected at the Υ(5S) resonance with the Belle detector at the KEKB e+ e- collider.
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Affiliation(s)
- R Louvot
- Ecole Polytechnique Fédérale de Lausanne, Lausanne
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Urquijo P, Barberio E, Adachi I, Aihara H, Arinstein K, Bakich AM, Belous K, Bhardwaj V, Bischofberger M, Bozek A, Bracko M, Browder TE, Chao Y, Chen A, Cheon BG, Chistov R, Cho IS, Choi Y, Dalseno J, Das A, Dash M, Dungel W, Eidelman S, Gabyshev N, Goldenzweig P, Golob B, Ha H, Haba J, Hayashii H, Horii Y, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Kah DH, Kang JH, Katayama N, Kawai H, Kawasaki T, Kim HO, Kim JH, Kim SK, Kim YI, Kim YJ, Kinoshita K, Ko BR, Kreps M, Krizan P, Krokovny P, Kuhr T, Kuzmin A, Kwon YJ, Kyeong SH, Lee MJ, Lee SE, Lee SH, Lesiak T, Li J, Limosani A, Liu C, Liventsev D, Louvot R, Mandl F, Matyja A, McOnie S, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nishimura K, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Ostrowicz W, Ozaki H, Pakhlova G, Park CW, Park HK, Park KS, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Schneider O, Schwanda C, Seidl R, Senyo K, Sevior ME, Shapkin M, Shiu JG, Shwartz B, Singh JB, Stanic S, Staric M, Sumisawa K, Taylor GN, Teramoto Y, Trabelsi K, Uehara S, Uglov T, Unno Y, Uno S, Varner G, Varvell KE, Vervink K, Wang CH, Wang MZ, Wang P, Watanabe Y, Wedd R, Won E, Yabsley BD, Yamashita Y, Zhang ZP, Zhilich V, Zhulanov V, Zivko T, Zupanc A, Zyukova O. Measurement of |V{ub}| from inclusive charmless semileptonic B decays. Phys Rev Lett 2010; 104:021801. [PMID: 20366585 DOI: 10.1103/physrevlett.104.021801] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Indexed: 05/29/2023]
Abstract
We present the partial branching fraction for inclusive charmless semileptonic B decays and the corresponding value of the Cabibbo-Kobayashi-Maskawa matrix element |V{ub}|, using a multivariate analysis method to access approximately 90% of the B-->X{u}lnu phase space. This approach dramatically reduces the theoretical uncertainties from the b-quark mass and nonperturbative QCD compared to all previous inclusive measurements. The results are based on a sample of 657x10{6} BB[over ] pairs collected with the Belle detector. We find that DeltaB(B-->X{u}lnu;p(l){*B}>1.0 GeV/c)=1.963x(1+/-0.088{stat}+/-0.081{syst})x10{-3}. Corresponding values of |V{ub}| are extracted using several theoretical calculations.
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Affiliation(s)
- P Urquijo
- University of Melbourne, School of Physics, Victoria 3010
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Dash M, Padhi S, Panda P, Pattnaik D, Parida B. PPTCT of HIV: two and a half year experience at MKCG medical college, Berhampur, India. Indian J Med Microbiol 2009; 27:276-7. [PMID: 19584517 DOI: 10.4103/0255-0857.53219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Louvot R, Wicht J, Schneider O, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich AM, Balagura V, Bay A, Bhardwaj V, Bitenc U, Bondar A, Bozek A, Bracko M, Browder TE, Chen A, Cheon BG, Chistov R, Cho IS, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Dungel W, Eidelman S, Gabyshev N, Goldenzweig P, Golob B, Ha H, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hoshi Y, Hou WS, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Joshi NJ, Kah DH, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim SK, Kim YI, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuzmin A, Kwon YJ, Kyeong SH, Lange JS, Lee JS, Lee MJ, Lee SE, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, Mandl F, Matyja A, McOnie S, Medvedeva T, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nakano E, Nakao M, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Ozaki H, Pakhlova G, Park CW, Park HK, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Schümann J, Schwartz AJ, Sekiya A, Senyo K, Sevior ME, Shapkin M, Shiu JG, Singh JB, Somov A, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Trabelsi K, Uehara S, Uglov T, Unno Y, Uno S, Usov Y, Varner G, Vervink K, Wang CC, Wang CH, Wang P, Wang XL, Watanabe Y, Wedd R, Won E, Yabsley BD, Yamashita Y, Yamauchi M, Zhang ZP, Zhilich V, Zhulanov V, Zivko T, Zupanc A, Zwahlen N, Zyukova O. Measurement of the Decay B_(s);(0)-->D_(s);(-)pi;(+) and Evidence for B_(s);(0)-->D_(s);(-/+)K;(+/-) in e;(+)e;(-) Annihilation at sqrt[s] approximately 10.87 GeV. Phys Rev Lett 2009; 102:021801. [PMID: 19257264 DOI: 10.1103/physrevlett.102.021801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Revised: 11/20/2008] [Indexed: 05/27/2023]
Abstract
We have studied B_(s);(0)-->D_(s);(-)pi;(+) and B_(s);(0)-->D_(s);(-/+)K;(+/-) decays using 23.6 fb;(-1) of data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB e;(+)e;(-) collider. This highly pure B_(s);(0)-->D_(s);(-)pi;(+) sample is used to measure the branching fraction, B(B_(s);(0)-->D_(s);(-)pi;(+))=[3.67_(-0.33);(+0.35)(stat)-0.42+0.43(syst)+/-0.49(f_(s))]x10;(-3) (f_(s)=N_(B_(s);((*))B[over ]_(s);((*)))/N_(bb[over ])) and the fractions of B_(s);(0) event types at the Upsilon(5S) energy, in particular N_(B_(s);(*)B[over ]_(s);(*))/N_(B_(s);((*))B[over ]_(s);((*)))=(90.1_(-4.0);(+3.8)+/-0.2)%. We also determine the masses M(B_(s);(0))=(5364.4+/-1.3+/-0.7) MeV/c;(2) and M(B_(s);(*))=(5416.4+/-0.4+/-0.5) MeV/c;(2). In addition, we observe B_(s);(0)-->D_(s);(-/+)K;(+/-) decays with a significance of 3.5sigma and measure B(B_(s);(0)-->D_(s);(-/+)K;(+/-))=[2.4_(-1.0);(+1.2)(stat)+/-0.3(syst)+/-0.3(f_(s))]x10;(-4).
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Affiliation(s)
- R Louvot
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne
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Goldenzweig P, Schwartz AJ, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Bay A, Bedny I, Bhardwaj V, Bitenc U, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Cheon BG, Chiang CC, Chistov R, Cho IS, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Golob B, Ha H, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Iwasaki M, Kah DH, Kang JH, Kawasaki T, Kichimi H, Kim HJ, Kim SK, Kim YI, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuzmin A, Kwon YJ, Kyeong SH, Lange JS, Lee JS, Lee MJ, Lee SE, Lesiak T, Li J, Limosani A, Lin SW, Liu C, Liu Y, MacNaughton J, Mandl F, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Nagamine T, Nakano E, Nakao M, Nakazawa H, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Park HK, Peak LS, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Schneider O, Schümann J, Schwanda C, Seidl R, Sekiya A, Senyo K, Sevior ME, Shapkin M, Shebalin V, Shen CP, Shiu JG, Singh JB, Somov A, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Tamura N, Tanaka M, Teramoto Y, Tikhomirov I, Trabelsi K, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Vervink K, Wang CC, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Wedd R, Wicht J, Won E, Yabsley BD, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhulanov V, Zivko T, Zupanc A, Zyukova O. Evidence for neutral B meson decays to omegaK*0. Phys Rev Lett 2008; 101:231801. [PMID: 19113539 DOI: 10.1103/physrevlett.101.231801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2008] [Indexed: 05/27/2023]
Abstract
We present the results of a study of the charmless vector-vector decay B0-->omegaK*0 with 657 x 10(6) BB pairs collected with the Belle detector at the KEKB e+e- collider. We measure the branching fraction to be B(B0-->omegaK*0) = [1.8+/-0.7(stat)+/-0.3(syst)]x 10(-6) with 3.0sigma significance. We also perform a helicity analysis of the omega and K*0 vector mesons, and obtain the longitudinal polarization fraction fL(B0-->omegaK*0) = 0.56+/-0.29(stat) -0.08(+0.18)(syst). Finally, we measure a large nonresonant branching fraction B[B0-->omegaK+pi(-);M Kpi in(0.755,1.250) GeV/c2] = [5.1+/-0.7(stat)+/-0.7(syst)]x 10(-6) with a significance of 9.5sigma.
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Affiliation(s)
- P Goldenzweig
- University of Cincinnati, Cincinnati, Ohio 45221, USA
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42
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Pakhlova G, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich AM, Balagura V, Bedny I, Bhardwaj V, Bitenc U, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chen A, Cheon BG, Chiang CC, Chistov R, Cho IS, Choi SK, Choi Y, Dalseno J, Danilov M, Dash M, Eidelman S, Gabyshev N, Ha H, Haba J, Hayasaka K, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kah DH, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim YI, Kim YJ, Kinoshita K, Krizan P, Krokovny P, Kumar R, Kuzmin A, Kwon YJ, Kyeong SH, Lange JS, Lee JS, Lee SE, Lesiak T, Li J, Limosani A, Liu C, Liventsev D, Mandl F, Matyja A, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park HK, Peak LS, Piilonen LE, Poluektov A, Sahoo H, Sakai Y, Schneider O, Senyo K, Shapkin M, Shen CP, Shiu JG, Shwartz B, Singh JB, Sokolov A, Stanic S, Staric M, Sumiyoshi T, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Wedd R, Won E, Yabsley BD, Yamashita Y, Yamauchi M, Yuan CZ, Zhang CC, Zhang ZP, Zhilich V, Zhulanov V, Zivko T, Zupanc A, Zyukova O. Observation of a near-threshold enhancement in the e+e- -->Lambda+_(c)Lambda-_(c) cross section using initial-state radiation. Phys Rev Lett 2008; 101:172001. [PMID: 18999743 DOI: 10.1103/physrevlett.101.172001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Indexed: 05/27/2023]
Abstract
We report a measurement of the exclusive e+ e- -->Lambda+_(c)Lambda-_(c) cross section as a function of center-of-mass energy near the Lambda+_(c)Lambda-_(c) threshold. A clear peak with a significance of 8.2sigma is observed in the Lambda+_(c)Lambda-_(c) invariant mass distribution just above threshold. With an assumption of a resonance origin for the observed peak, a mass and width of M=[4634 (+8)_(-7)(stat)(+5)_(-8)(syst)] MeV/c(2) and Gamma_(tot)=[92 (+40)_(-24)(stat)(+10)_(-21)(syst)] MeV are determined. The analysis is based on a study of events with initial-state-radiation photons in a data sample collected with the Belle detector at the Upsilon(4S) resonance and nearby continuum with an integrated luminosity of 695 fb(-1) at the KEKB asymmetric-energy e+ e- collider.
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Affiliation(s)
- G Pakhlova
- Institute for Theoretical and Experimental Physics, Moscow
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Taniguchi N, Nakao M, Nishida S, Adachi I, Aihara H, Arinstein K, Aushev T, Aziz T, Bakich AM, Balagura V, Bay A, Belous K, Bhardwaj V, Bitenc U, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chiang CC, Cho IS, Choi Y, Dalseno J, Dash M, Drutskoy A, Dungel W, Eidelman S, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Hoshi Y, Hou WS, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwabuchi M, Iwasaki M, Iwasaki Y, Joshi NJ, Kah DH, Kaji H, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim SK, Kim YI, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuzmin A, Kwon YJ, Kyeong SH, Lange JS, Lee JS, Lee SE, Lesiak T, Limosani A, Lin SW, Liu C, Liu Y, Liventsev D, Mandl F, McOnie S, Miyabayashi K, Miyazaki Y, Moloney GR, Nagasaka Y, Nakamura I, Nakano E, Nakazawa H, Natkaniec Z, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Park HK, Park KS, Peak LS, Piilonen LE, Sahoo H, Sakai Y, Sasao N, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shen CP, Shiu JG, Shwartz B, Singh JB, Sokolov A, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki SY, Tamura N, Taylor GN, Teramoto Y, Tikhomirov I, Trabelsi K, Tsuboyama T, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Wedd R, Wicht J, Won E, Yabsley BD, Yamashita Y, Yusa Y, Zhang ZP, Zhilich V, Zhulanov V, Zivko T, Zupanc A, Zyukova O. Measurement of branching fractions, isospin, and CP-violating asymmetries for exclusive b-->dgamma modes. Phys Rev Lett 2008; 101:111801. [PMID: 18851272 DOI: 10.1103/physrevlett.101.111801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2008] [Indexed: 05/26/2023]
Abstract
We report new measurements of the decays B+-->rho+gamma, B0-->rho0gamma, and B0-->omegagamma using a data sample of 657x10(6) B meson pairs accumulated with the Belle detector at the KEKB e+e- collider. We measure branching fractions B(B+-->rho+gamma)=(8.7_-2.7-1.1;+2.9+0.9)x10(-7), B(B0-->rho0gamma)=(7.8_-1.6-1.0;+1.7+0.9)x10(-7), and B(B0-->omegagamma)=(4.0_-1.7;+1.9+/-1.3)x10(-7). We also report the isospin asymmetry Delta(rhogamma)=-0.48_-0.19-0.09;+0.21+0.08 and the first measurement of the direct CP-violating asymmetry ACP(B+-->rho+gamma)=-0.11+/-0.32+/-0.09, where the first and second errors are statistical and systematic, respectively.
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Iwabuchi M, Nakao M, Adachi I, Arinstein K, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Belous K, Bhardwaj V, Bitenc U, Bozek A, Bracko M, Browder TE, Chen A, Chen WT, Cheon BG, Cho IS, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Fujikawa M, Gabyshev N, Ha H, Haba J, Hayasaka K, Hazumi M, Heffernan D, Horii Y, Hoshi Y, Hou WS, Hyun HJ, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Kah DH, Kaji H, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim YI, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kwon YJ, Lee JS, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liu C, Liu Y, Liventsev D, Mandl F, Matyja A, McOnie S, Medvedeva T, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Moloney GR, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park HK, Park KS, Peak LS, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Schneider O, Schümann J, Schwanda C, Sekiya A, Senyo K, Shapkin M, Shibuya H, Shiu JG, Shwartz B, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Tanaka M, Teramoto Y, Tikhomirov I, Trabelsi K, Uchida Y, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Vervink K, Wang CC, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Wicht J, Won E, Yamashita Y, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A. Search for B+-->D*+pi0 decay. Phys Rev Lett 2008; 101:041601. [PMID: 18764317 DOI: 10.1103/physrevlett.101.041601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2008] [Indexed: 05/26/2023]
Abstract
We report on a search for the doubly Cabibbo suppressed decay B+-->D*+pi0, based on a data sample of 657x10(6) BB pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find no significant signal and set an upper limit of B(B+-->D*+pi0)<3.6x10(-6) at the 90% confidence level. This limit can be used to constrain the ratio between suppressed and favored B-->D*pi decay amplitudes, r<0.051, at the 90% confidence level.
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Affiliation(s)
- M Iwabuchi
- The Graduate University for Advanced Studies, Hayama
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Chen JH, Wang MZ, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Cho IS, Choi SK, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Joshi NJ, Kah DH, Kaji H, Kapusta P, Katayama N, Kawasaki T, Kichimi H, Kim HJ, Kim SK, Kim YJ, Kinoshita K, Krokovny P, Kumar R, Kuo CC, Kwon YJ, Lee JS, Lee MJ, Lee SE, Lesiak T, Li J, Limosani A, Liu C, Liventsev D, Mandl F, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sahoo H, Sakai Y, Schneider O, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shiu JG, Singh JB, Somov A, Stanic S, Staric M, Sumiyoshi T, Takasaki F, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Trabelsi K, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Villa S, Vinokurova A, Wang CC, Wang CH, Wang P, Wang XL, Watanabe Y, Wedd R, Won E, Yamamoto H, Yamashita Y, Zhang CC, Zhang ZP, Zhulanov V, Zupanc A. Observation of B{0}-->ppK*0 with a large K*0 polarization. Phys Rev Lett 2008; 100:251801. [PMID: 18643652 DOI: 10.1103/physrevlett.100.251801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Indexed: 05/26/2023]
Abstract
Using a 492 fb{-1} data sample collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{+}e{-} collider, we observe the decay B{0}-->ppK*0 with a branching fraction of (1.18{-0.25}{+0.29}(stat)+/-0.11(syst))x10{-6}. We study the decay dynamics of B{0}-->ppK*0 and compare with B{+}-->ppK*+. The K*0 meson is found to be almost 100% polarized (with a fraction of (101+/-13+/-3)% in the helicity zero state), while the K*+ meson has a (32+/-17+/-9)% fraction in the helicity zero state. The direct CP asymmetries for B{0}-->ppK*0 and B{+}-->ppK*+ are measured to be -0.08+/-0.20+/-0.02 and -0.01+/-0.19+/-0.02, respectively. In addition, we report improved measurements of the branching fractions B(B{+}-->ppK*+)=(3.38{-0.60}{+0.73}+/-0.39)x10{-6} and B(B{0}-->ppK{0})=(2.51{-0.29}{+0.35}+/-0.21)x10{-6}, which supersede our previous measurements.
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Affiliation(s)
- J-H Chen
- Department of Physics, National Taiwan University, Taipei
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Widhalm L, Adachi I, Aihara H, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Bedny I, Bhardwaj V, Bitenc U, Blyth S, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Cho IS, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Goldenzweig P, Golob B, Ha H, Haba J, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kah DH, Kang JH, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuroki Y, Kuzmin A, Kwon YJ, Lee J, Lee JS, Lee MJ, Lee SE, Lesiak T, Lin SW, Liu C, Liventsev D, Mandl F, Matyja A, McOnie S, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Park KS, Peak LS, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Schneider O, Seidl R, Sekiya A, Senyo K, Shapkin M, Shibuya H, Shiu JG, Singh JB, Somov A, Stanic S, Staric M, Sumiyoshi T, Suzuki SY, Takasaki F, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Trabelsi K, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Wang CH, Wang MZ, Wang P, Watanabe Y, Wedd R, Won E, Yabsley BD, Yamamoto H, Yamashita Y, Zhang ZP, Zhilich V, Zupanc A, Zyukova O. Measurement of B(Ds{+}-->mu+nu(mu)). Phys Rev Lett 2008; 100:241801. [PMID: 18643570 DOI: 10.1103/physrevlett.100.241801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2008] [Indexed: 05/26/2023]
Abstract
We present a measurement of the branching fraction B(D{s}{+}-->mu{+}nu{mu}) using a 548 fb{-1} data sample collected by the Belle experiment at the KEKB e{+}e{-} collider. The D{s} momentum is determined by reconstruction of the system recoiling against DKgammaX in events of the type e{+}e{-}-->D{s}{*}DKX, D{s}{*}-->D{s}gamma, where X represents additional pions or photons from fragmentation. This full-reconstruction method provides high resolution in the neutrino momentum and thus good background separation, equivalent to that achieved by experiments at the tau-charm factories. We obtain the branching fraction B(D{s}{+}-->mu{+}nu{mu})=[6.44+/-0.76(stat)+/-0.57(syst)]x10{-3}, implying a D{s} decay constant of f{D{s}}=[275+/-16(stat)+/-12(syst)] MeV.
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Affiliation(s)
- L Widhalm
- Institute of High Energy Physics, Vienna
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Brennan F, Dash M. The year of magical thinking: Joan Didion and the dialectic of grief. Med Humanit 2008; 34:35-39. [PMID: 23674538 DOI: 10.1136/jmh.2008.000271] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Joan Didion is a prominent American writer. In late 2003, while her only child lay critically ill, her husband, John, died suddenly. Theirs was a marriage of great intimacy and love. Grief enveloped her. Eventually she began to write an account of the first 12 months of her bereavement and the vigil for her child: The year of magical thinking. Raw, insightful and challenging, it is a rich, generous and graceful document. Didion draws on the literature of grief, personal and professional. Here, those readings are examined and reflections are made on the singular, unique grief of the author in the context of current theories on bereavement.
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Pakhlov P, Adachi I, Aihara H, Arinstein K, Aushev T, Aziz T, Bakich AM, Balagura V, Barberio E, Bedny I, Belous K, Bhardwaj V, Bitenc U, Bondar A, Bozek A, Bracko M, Browder TE, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Golob B, Ha H, Hayasaka K, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kah DH, Kang JH, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kwon YJ, Lange JS, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liu Y, Liventsev D, Mandl F, Matyja A, Medvedeva T, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Mori T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlova G, Palka H, Park CW, Peak LS, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Schneider O, Seidl R, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shiu JG, Singh JB, Somov A, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Wang CH, Wang P, Wang XL, Watanabe Y, Won E, Yabsley BD, Yamashita Y, Yamauchi M, Yuan CZ, Zhang CC, Zhang ZP, Zhilich V, Zupanc A, Zyukova O. Production of new charmoniumlike states in e+e- -->J/psiD*D[over](*) at sqrt[s] approximately 10.6 GeV. Phys Rev Lett 2008; 100:202001. [PMID: 18518525 DOI: 10.1103/physrevlett.100.202001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2007] [Indexed: 05/26/2023]
Abstract
We report a study of the processes e+e- -->J/psiD*D[over](*). In J/psiD*D[over]* we observe a significant enhancement in the D*D[over]* invariant mass spectrum, which we interpret as a new charmoniumlike state and denote X(4160). The X(4160) parameters are M=(4156(-20)+25+/-15) MeV/c2 and Gamma=(139(-61)+111+/-21) MeV. We also report a new measurement of the X(3940) mass and width: M=(3942(-6)+7+/-6) MeV/c2 and Gamma=(37(-15)+26+/-8) MeV. The analysis is based on a 693 fb(-1) data sample recorded near the Upsilon(4S) resonance by the Belle detector at the KEKB asymmetric-energy collider.
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Affiliation(s)
- P Pakhlov
- Institute for Theoretical and Experimental Physics, Moscow
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Sahoo H, Browder TE, Trabelsi K, Adachi I, Aihara H, Arinstein K, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bondar A, Bozek A, Bračko M, Chang MC, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Cho IS, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Golob B, Ha H, Haba J, Hara K, Hara T, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Joshi NJ, Kah DH, Kang JH, Kapusta P, Katayama N, Kichimi H, Kim HJ, Kim YJ, Kinoshita K, Korpar S, Kozakai Y, Križan P, Krokovny P, Kumar R, Kuo CC, Kuroki Y, Kwon YJ, Lee JS, Lee MJ, Lee SE, Lesiak T, Li J, Limosani A, Liventsev D, Mandl F, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Peak LS, Pestotnik R, Piilonen LE, Sakai Y, Schneider O, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shiu JG, Shwartz B, Somov A, Stanič S, Starič M, Sumisawa K, Sumiyoshi T, Takasaki F, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Vervink K, Villa S, Wang CH, Wang P, Wang XL, Watanabe Y, Wedd R, Won E, Yamamoto H, Yamashita Y, Zhang CC, Zhang ZP, Zhulanov V, Zupanc A. Measurements of time-dependentCPviolation inB0→ψ(2S)KS0decays. Int J Clin Exp Med 2008. [DOI: 10.1103/physrevd.77.091103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bharti N, Mohanty B, Bithal PK, Dash M, Dash HH. Intraocular Pressure Changes Associated with Intubation with the Intubating Laryngeal Mask Airway Compared with Conventional Laryngoscopy. Anaesth Intensive Care 2008; 36:431-5. [DOI: 10.1177/0310057x0803600315] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This open, prospective, randomised study was designed to evaluate the changes in intraocular pressure and haemodynamics after tracheal intubation using either the intubating laryngeal mask airway (ILMA) or direct laryngoscopy. Sixty adult patients, ASA physical status 1 or 2 with normal intraocular pressure were randomly allocated to one of the two techniques. Anaesthesia was induced with propofol followed by rocuronium. Tracheal intubation was performed using either the ILMA or Macintosh laryngoscope. Intraocular pressure, heart rate and blood pressure were measured immediately before and after tracheal intubation and then minutely for five minutes. In the laryngoscopy group there was a significant increase in intraocular pressure (from 7.2 ± 1.4 to 16.8 ± 5.3 mmHg, P <0.01), which did not return to pre-intubation levels within five minutes, and also in mean arterial pressure after tracheal intubation, which returned to baseline levels after five minutes. In the ILMA group there were no significant changes in intraocular pressure (from 7.6±1.8 to 10.4±2.8 mmHg, P >0.05) or mean arterial pressure after tracheal intubation. Time to successful intubation was longer with the ILMA, 56.8 ± 7.8 seconds, compared with the laryngoscopy group, 33±3.6 seconds (P <0.01). Mucosal trauma was more frequent with the ILMA (eight of 30) compared with the laryngoscopy group (three of 30) (P <0.01). The postoperative complications were comparable. In terms of minimising increases in intraocular pressure and blood pressure, we conclude that the ILMA has an advantage over direct laryngoscopy for tracheal intubation.
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Affiliation(s)
- N. Bharti
- Department of Neuroanaesthesia, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - B. Mohanty
- Department of Neuroanaesthesia, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - P. K. Bithal
- Department of Neuroanaesthesia, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - M. Dash
- Department of Neuroanaesthesia, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - H. H. Dash
- Department of Neuroanaesthesia, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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