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Ilyas S, E M Sahnoun S, Szymura A, Pes J, Habib S, Florea A, Schäfer L, Buhl EM, Morgenroth A, Habib P, Mottaghy FM, Mathur S. Validation of Dual-Action Chemo-Radio-Labeled Nanocarriers with High Efficacy against Triple-Negative Breast Cancer. ACS Appl Mater Interfaces 2023; 15:48963-48977. [PMID: 37831583 DOI: 10.1021/acsami.3c10579] [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] [Subscribe] [Scholar Register] [Indexed: 10/15/2023]
Abstract
Identification and selectivity of molecular targets with prolonged action for difficult-to-target cancer such as triple-negative breast cancer (TNBC) represent a persisting challenge in the precision delivery of therapeutics. In the quest to target undruggable sites, this study validates the bioavailability of polydopamine-sealed mesoporous silica nanocarriers (PDA-mSiO2) for in vivo drug delivery to TNBC. For controlled transport and release, the chemotherapeutic drug doxorubicin was encapsulated in mSiO2 nanocarriers coated with a PDA layer serving as a stimuli-responsive gatekeeper or seal. For unifying targeting and treatment modalities, these nanocarriers were covalently conjugated to a macrocyclic chelator (DOTA) and folate (FA-mSiO2.) that enabled incorporation of radionuclides and identification of FR Alpha (FolRα) receptors present on TNBC cells. The robust chemical design of FA- and DOTA-functionalized PDA-coated mSiO2 nanocarriers constitutes mild reaction conditions to avoid the loss of surface-bound molecules. The radiolabeling studies with the theranostic pair 68Ga and 177Lu showed quantitative trends for radiochemical efficacy and purity. Nanocarriers equipped with both radiolabels and affinity ligands were optimally stable when incubated with human serum for up to 120 h (177Lu), demonstrating hydrophilicity with a partition coefficient (log P) of -3.29 ± 0.08. Specifically, when incubated with TNBC cells, the cells received significant FA-mSiO2 carriers, demonstrating efficient carrier internalization and time-dependent uptake. Moreover, in vivo results visualize the retention of drug-filled carriers at the tumor sites for a long time, which holds promise for therapeutic studies. This research work demonstrates for the first time the successful dual conjugation of nanocarriers through the colocation of radionuclides and anticancer drugs that is promising for both live molecular imaging and enhanced therapeutic effect for TNBC.
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Affiliation(s)
- Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Sabri E M Sahnoun
- Department of Nuclear Medicine, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
| | - Annika Szymura
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Jonas Pes
- Department of Neurology, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
| | - Shahin Habib
- Department of Nuclear Medicine, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
| | - Alexandru Florea
- Department of Nuclear Medicine, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center (MUMC+), 6202 Maastricht, The Netherlands
- School for Cardiovascular Diseases (CARIM), Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands
| | - Laura Schäfer
- Department of Nuclear Medicine, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
| | - Eva Miriam Buhl
- Electron Microscopy Facility, Institute of Pathology, University Hospital Aachen, RWTH Aachen University, 52074 Aachen, Germany
| | - Agnieszka Morgenroth
- Department of Nuclear Medicine, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
| | - Pardes Habib
- Department of Neurology, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
- Institute of Biochemistry and Molecular Immunology, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
- JARA-BRAIN Institute of Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, 52074 Aachen, Germany
| | - Felix M Mottaghy
- Department of Nuclear Medicine, University Hospital, RWTH Aachen University, 52074 Aachen, Germany
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center (MUMC+), 6202 Maastricht, The Netherlands
- School for Cardiovascular Diseases (CARIM), Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands
- Center of Integrated Oncology (CIO), Universities of Aachen, Bonn, Cologne, and Düsseldorf, 50937 Cologne, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
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Wang Q, Khosropanah P, van der Kuur J, de Lange G, Audley MD, Aminaei A, Ilyas S, Ridder ML, van der Linden AJ, Bruijn MP, van der Tak F, Gao JR. Frequency division multiplexing readout of a transition edge sensor bolometer array with microstrip-type electrical bias lines. Rev Sci Instrum 2022; 93:124901. [PMID: 36586892 DOI: 10.1063/5.0108786] [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: 07/10/2022] [Accepted: 11/26/2022] [Indexed: 06/17/2023]
Abstract
We demonstrate multiplexed readout of 43 transition edge sensor (TES) bolometers operating at 90 mK using a frequency division multiplexing (FDM) readout chain with bias frequencies ranging from 1 to 3.5 MHz and a typical frequency spacing of 32 kHz. We improve the previously reported performance of our FDM system by two important steps. First, we replace the coplanar wires with microstrip wires, which minimize the cross talk from mutual inductance. From the measured electrical cross talk (ECT) map, the ECT of all pixels is carrier leakage dominated. Only five pixels show an ECT level higher than 1%. Second, we reduce the thermal response speed of the TES detectors by a factor of 20 by increasing the heat capacity of the TES, which allows us to bias all TES detectors below 50% in transition without oscillations. We compare the current-voltage curves and noise spectra of the TESs measured in single-pixel mode and multiplexing mode. We also compare the noise equivalent power (NEP) and the saturation power of the bolometers in both modes, where 38 pixels show less than 10% difference in NEP and 5% difference in saturation power when measured in the two different modes. The measured noise spectrum is in good agreement with the simulated noise based on measured parameters from an impedance measurement, confirming that our TES is dominated by phonon noise.
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Affiliation(s)
- Q Wang
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - P Khosropanah
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - J van der Kuur
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - G de Lange
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - M D Audley
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - A Aminaei
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - S Ilyas
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - M L Ridder
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - A J van der Linden
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - M P Bruijn
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - F van der Tak
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
| | - J R Gao
- SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands
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Renner AM, Derichsweiler C, Ilyas S, Gessner I, Fries JWU, Mathur S. High efficiency capture of biomarker miRNA15a for noninvasive diagnosis of malignant kidney tumors. Biomater Sci 2022; 10:1113-1122. [PMID: 35048092 DOI: 10.1039/d1bm01737c] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
To date, there are no preoperative and quantitative dynamics in clinical practice that can reliably differentiate between a benign and malignant renal cell carcinoma (RCC). For monitoring different analytes in body fluids, more than 40 different molecular biomarkers have been identified, however, they are associated with limited clinical sensitivity and/or non-optimal specificity due to their leaky nature. Previous work on RCC demonstrated the miRNA15a to be reliable and novel biomarker with 98.1% specificity and 100% sensitivity. Despite the high potential of miRNA15a biomarker, its clinical application is considerably hampered by the insensitive nature of the detection methods and low concentration of biomarker in samples that is aggravated by the high level of contamination due to other solutes present in body fluids. In this work, a non-invasive quantitative approach is demonstrated to overcome such diagnostics issues through biotin-streptavidin binding and fluorescence active magnetic nanocarriers that ensured prompt isolation, enrichment and purification of the biomarker miRNA15a from urine. The study demonstrates that detectable low levels of these miRNAs through miRNA capturing nanocarriers can potentially function as advanced diagnostic markers for the non-invasive investigation and early detection of renal cancer.
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Affiliation(s)
- Alexander M Renner
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
| | - Christina Derichsweiler
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
| | - Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
| | - Isabel Gessner
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
| | - Jochen W U Fries
- Institute of Urology/Pathology, University Hospital of Cologne, Kerpenerstr. 62, 50924 Cologne, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
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Siribbal SM, Ilyas S, Renner AM, Iqbal S, Muñoz Vázquez S, Moawia A, Valldor M, Hussain MS, Schomäcker K, Mathur S. Click functionalized biocompatible gadolinium oxide core-shell nanocarriers for imaging of breast cancer cells. RSC Adv 2022; 12:31830-31845. [PMID: 36380928 PMCID: PMC9641724 DOI: 10.1039/d2ra00347c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 01/17/2022] [Accepted: 08/07/2022] [Indexed: 11/10/2022] Open
Abstract
Site-specific delivery using functionalized nanocarriers is in high demand in imaging applications of modern clinical research. To improve the imaging capabilities of conventionally used contrast agents and expand the targeting accuracy, functional gadolinium oxide based nanocarriers originated from homogeneous core shells structures (Gd2O3@SiO2@Fe3O4) were developed using a multilayer formation approach. The synthesis and chemical configuration for the covalent binding of macrocyclic chelating agents and estrogen targeting molecules on these nanocarriers were designed by a two-step chemical synthesis method. Initially, SiO2@Fe3O4 structures were prepared and encapsulated with a homogenous thin Gd2O3 overlayer. The exterior surface of the as-prepared carriers offered chemical binding with a breast cancer specific estrogen molecule, covalently grafted through a Click-Chemistry protocol. In the next step, to enhance the diagnostic imaging capabilities of these carriers, thiocyanate-linked chelator molecule, DOTA, was attached to the surface of estrogen bound Gd2O3@SiO2@Fe3O4 using basic reaction conditions. The active amino groups before and after conjugation of estrogen molecules on the surface were quantified using a fluorescamine based approach. Due to the covalent binding of the macrocyclic chelator to the Gd2O3@SiO2@Fe3O4 surface, core shell carriers showed potential radiolabeling efficiency using positron emitter radionuclide, gallium-68 (68Ga). Intracellular uptake of estrogen-conjugated carriers was evaluated with MCF7 breast cancer cell lines using confocal laser scanning microscopy and fluorescent flow cytometry. In addition, in vitro cytotoxicity studies of functional nanocarriers as compared to bare nanoparticles showed reduced toxicity to HEK-293 cells demonstrating the role of surface attached molecules in preventing direct exposure of the Gd2O3 surface to the cells. The as-developed gadolinium based nanocarriers presented excellent capabilities as biocompatible target-specific imaging probes which indicates great potential in the field of dual-mode contrast agents. Site-specific delivery using functionalized nanocarriers is in high demand in imaging applications of modern clinical research.![]()
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Affiliation(s)
- Shifaa M. Siribbal
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Alexander M. Renner
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Sumiya Iqbal
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Sergio Muñoz Vázquez
- Clinic and Polyclinic for Nuclear Medicine, University of Cologne, Kerpenerstrasse 62, 50937 Cologne, Germany
| | - Abubakar Moawia
- Cologne Center for Genomics (CCG), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50931 Cologne, Germany
- Center for Biochemistry, Medical Faculty, University of Cologne, 50931 Cologne, Germany
| | - Martin Valldor
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Blindern, 0315 Oslo, Norway
| | - Muhammad S. Hussain
- Cologne Center for Genomics (CCG), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50931 Cologne, Germany
- Center for Biochemistry, Medical Faculty, University of Cologne, 50931 Cologne, Germany
| | - Klaus Schomäcker
- Clinic and Polyclinic for Nuclear Medicine, University of Cologne, Kerpenerstrasse 62, 50937 Cologne, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
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Siribbal SM, Ilyas S, Renner AM, Iqbal S, Vázquez SM, Moawia A, Valldor M, Hussain MS, Schomäcker K, Mathur S. Correction: Click functionalized biocompatible gadolinium oxide core-shell nanocarriers for imaging of breast cancer cells. RSC Adv 2022; 12:34639. [DOI: 10.1039/d2ra90119f] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 11/18/2022] [Indexed: 12/03/2022] Open
Abstract
Correction for ‘Click functionalized biocompatible gadolinium oxide core-shell nanocarriers for imaging of breast cancer cells’ by Shifaa M. Siribbal et al., RSC Adv., 2022, 12, 31830–31845, https://doi.org/10.1039/D2RA00347C.
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Affiliation(s)
- Shifaa M. Siribbal
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Alexander M. Renner
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Sumiya Iqbal
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Sergio Muñoz Vázquez
- Clinic and Polyclinic for Nuclear Medicine, University of Cologne, Kerpenerstrasse 62, 50937 Cologne, Germany
| | - Abubakar Moawia
- Cologne Center for Genomics (CCG), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50931 Cologne, Germany
- Center for Biochemistry, Medical Faculty, University of Cologne, 50931 Cologne, Germany
| | - Martin Valldor
- Max-Planck-Institut für Chemische Physik Fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Blindern, 0315 Oslo, Norway
| | - Muhammad S. Hussain
- Cologne Center for Genomics (CCG), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50931 Cologne, Germany
- Center for Biochemistry, Medical Faculty, University of Cologne, 50931 Cologne, Germany
| | - Klaus Schomäcker
- Clinic and Polyclinic for Nuclear Medicine, University of Cologne, Kerpenerstrasse 62, 50937 Cologne, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
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Prabudi MO, Siregar MFG, Nasution IPA, Ilyas S. The Effect of Ascorbic Acid on Interleukin-10 and Tumor Necrosis Factor-α Cytokines in Rattus norvegicus with Endometritis. Open Access Maced J Med Sci 2021. [DOI: 10.3889/oamjms.2021.6946] [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
BACKGROUND: Endometritis is a gynecological disease characterized by inflammation of the endometrial glands and stroma. Inflammatory stimuli or tissue injury induce inflammatory pain through the release of cytokines. Ascorbic acid (AA) is a water-soluble Vitamin that plays a role in inhibiting the production of proinflammatory cytokines and increases the expression of anti-inflammatory cytokines.
AIM: The purpose of this study was to find out the association between administration of AA and inflammatory cytokines in experimental animals Rattus norvegicus with endometritis.
METHODS: The research was conducted using virgin female R. norvegicus laboratory mice weighing 250–300 g and aged 11–12 weeks with an estrus cycle of 5–6 days. Mice with regular oestrous cycles were randomly divided into three groups: group 1 was given 200 L of water orally without Escherichia coli inoculation and represented a negative control. Groups 2 and 3 were inoculated (50 L/rat) E. coli intravaginally, 106 colony-forming unit/mL, Group 2 was not given AA and the other side Group 3 was assigned AA. The interleukin (IL)-10 and tumor necrosis factor (TNF)-α _cytokines examination was carried out by histopathological examination through a biopsy of the endometrial tissue. Hypothesis testing on the data was analyzed by the Kruskal Wallis test using Statistical Package for Social Sciences.
RESULTS: Data from the current study revealed that the highest mean value of IL-10 was found in the negative control group (2.5) and the lowest value in the positive control group (1.3). Regarding TNF-α _the highest mean value (2.8) was found in the treatment group and the lowest mean value (2.1) was found in the treatment group. Using the Kruskal Wallis test, IL-10 and TNF-α _showed insignificant results (p = value 0.304 and 0.145 respectively).
CONCLUSIONS: The administration of AA did not affect the decrease in TNF-α _or the upregulation of IL-10 as anti-inflammatory cytokines.
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Gormley G, Ilyas S, Hiscock R, Simmons S. P.64 Assessing the compliance to an enhanced recovery after surgery for caesarean section program using protocol-determined factors. Int J Obstet Anesth 2021. [DOI: 10.1016/j.ijoa.2021.103062] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Gormley G, Ilyas S. P.98 Introduction of a ‘Pain Medication Tracker’ to aid post- discharge analgesia compliance as part of an enhanced recovery after surgery for caesarean section program. Int J Obstet Anesth 2021. [DOI: 10.1016/j.ijoa.2021.103096] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Schütz MB, Renner AM, Ilyas S, Lê K, Guliyev M, Krapf P, Neumaier B, Mathur S. 18F-Labeled magnetic nanovectors for bimodal cellular imaging. Biomater Sci 2021; 9:4717-4727. [PMID: 34032225 DOI: 10.1039/d1bm00616a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Surface modification of nanocarriers enables selective attachment to specific molecular targets within a complex biological environment. Besides the enhanced uptake due to specific interactions, the surface ligands can be utilized for radiolabeling applications for bimodal imaging ensured by positron emission topography (PET) and magnetic resonance imaging (MRI) functions in one source. Herein, we describe the surface functionalization of magnetite (Fe3O4) with folic acid as a target vector. Additionally, the magnetic nanocarriers were conjugated with appropriate ligands for subsequent copper-catalyzed azide-alkyne cycloaddition or carbodiimide coupling reactions to successfully achieve radiolabeling with the PET-emitter 18F. The phase composition (XRD) and size analysis (TEM) confirmed the formation of Fe3O4 nanoparticles (6.82 nm ± 0.52 nm). The quantification of various surface functionalities was performed by Fourier-transform infrared spectroscopy (FT-IR) and ultraviolet-visible microscopy (UV-Vis). An innovative magnetic-HPLC method was developed in this work for the determination of the radiochemical yield of the 18F-labeled NPs. The as-prepared Fe3O4 particles demonstrated high radiochemical yields and showed high cellular uptake in a folate receptor overexpressing MCF-7 cell line, validating bimodal imaging chemical design and a magnetic HPLC system. This novel approach, combining folic acid-capped Fe3O4 nanocarriers as a targeting vector with 18F labeling, is promising to apply this probe for bimodal PET/MR-studies.
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Affiliation(s)
- Markus B Schütz
- Institute of Inorganic Chemistry, University of Cologne, D-50939 Cologne, Germany.
| | - Alexander M Renner
- Institute of Inorganic Chemistry, University of Cologne, D-50939 Cologne, Germany.
| | - Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne, D-50939 Cologne, Germany.
| | - Khan Lê
- Institute of Inorganic Chemistry, University of Cologne, D-50939 Cologne, Germany.
| | - Mehrab Guliyev
- Institute of Neuroscience and Medicine-Nuclear Chemistry (INM-5), Forschungszentrum Jülich, D-52428 Jülich, Germany
| | - Philipp Krapf
- Institute of Neuroscience and Medicine-Nuclear Chemistry (INM-5), Forschungszentrum Jülich, D-52428 Jülich, Germany
| | - Bernd Neumaier
- Institute of Neuroscience and Medicine-Nuclear Chemistry (INM-5), Forschungszentrum Jülich, D-52428 Jülich, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, D-50939 Cologne, Germany.
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Wang Q, Khosropanah P, van der Kuur J, de Lange G, Audley MD, Aminaei A, Hijmering R, Ridder ML, Ilyas S, van der Linden AJ, Bruijn MP, van der Tak F, Gao JR. Electrical cross talk of a frequency division multiplexing readout for a transition edge sensor bolometer array. Rev Sci Instrum 2021; 92:014710. [PMID: 33514257 DOI: 10.1063/5.0032929] [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: 10/12/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
We have characterized and mapped the electrical cross talk (ECT) of a frequency division multiplexing (FDM) system with a transition edge sensor (TES) bolometer array, which is intended for space applications. By adding a small modulation at 120 Hz to the AC bias voltage of one bolometer and measuring the cross talk response in the current noise spectra of the others simultaneously, we have for the first time mapped the ECT level of 61 pixels with a nominal frequency spacing of 32 kHz in a 61 × 61 matrix and a carrier frequency ranging from 1 MHz to 4 MHz. We find that about 94% of the pixels show an ECT level of less than 0.4%. Only the adjacent pixels reach this level, and the ECT for the rest of the pixels is less than 0.1%. We also observe higher ECT levels, up to 10%, between some of the pixels, which have bundled long, parallel coplanar wires connecting TES bolometers to inductor-capacitor filters. In this case, the high mutual inductances dominate. To mitigate this source of ECT, the coplanar wires should be replaced by microstrip wires in the array. Our study suggests that an FDM system can have a relatively low ECT level, e.g., around 0.4% if the frequency spacing is 30 kHz. Our results successfully demonstrate a low electrical cross talk for a space FDM technology.
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Affiliation(s)
- Q Wang
- SRON Netherlands Institute for Space Research, 9700 AV Groningen, The Netherlands
| | - P Khosropanah
- SRON Netherlands Institute for Space Research, 3584 CA Utrecht, The Netherlands
| | - J van der Kuur
- SRON Netherlands Institute for Space Research, 9700 AV Groningen, The Netherlands
| | - G de Lange
- SRON Netherlands Institute for Space Research, 9700 AV Groningen, The Netherlands
| | - M D Audley
- SRON Netherlands Institute for Space Research, 9700 AV Groningen, The Netherlands
| | - A Aminaei
- SRON Netherlands Institute for Space Research, 3584 CA Utrecht, The Netherlands
| | - R Hijmering
- SRON Netherlands Institute for Space Research, 3584 CA Utrecht, The Netherlands
| | - M L Ridder
- SRON Netherlands Institute for Space Research, 3584 CA Utrecht, The Netherlands
| | - S Ilyas
- SRON Netherlands Institute for Space Research, 3584 CA Utrecht, The Netherlands
| | - A J van der Linden
- SRON Netherlands Institute for Space Research, 3584 CA Utrecht, The Netherlands
| | - M P Bruijn
- SRON Netherlands Institute for Space Research, 3584 CA Utrecht, The Netherlands
| | - F van der Tak
- SRON Netherlands Institute for Space Research, 9700 AV Groningen, The Netherlands
| | - J R Gao
- SRON Netherlands Institute for Space Research, 3584 CA Utrecht, The Netherlands
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Renner AM, Ilyas S, Schlößer HA, Szymura A, Roitsch S, Wennhold K, Mathur S. Receptor-Mediated In Vivo Targeting of Breast Cancer Cells with 17α-Ethynylestradiol-Conjugated Silica-Coated Gold Nanoparticles. Langmuir 2020; 36:14819-14828. [PMID: 33210924 DOI: 10.1021/acs.langmuir.0c02820] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Efficient therapies for breast cancer remain elusive because of the lack of strategies for targeted transport and receptor-mediated uptake of synthetic drug molecules by cancer cells. Conjugation of nanoparticles (NPs) with active targeting ligands enabling selective molecular recognition of antigens expressed on the surface of cancer cells is promising for localization and treatment of malignant cells. In this study, covalent attachment of synthetic estrogen 17α-ethynylestradiol on the silica (SiO2) shell of silica-gold NPs (SiO2@Au) was undertaken to improve the cancer-targeting ability of the nano-biotags. Chemical and structural analysis of the bioconjugates examined in solution (UV-vis and ξ-potential) and solid state (Fourier transform infrared spectroscopy, X-ray diffractometry, and transmission electron microscopy) confirmed the identity of the carrier particles and surface-bound ligands. The mesoporous silica shell served as a reservoir for anticancer drugs (doxorubicin and quercetin) and to facilitate covalent attachment of receptor molecules by click chemistry protocols. The chemoselective recognition between the nanoconjugates and cell membranes was successfully demonstrated by the accumulation of nanoprobes in the tumor tissue of mice with subcutaneous breast cancer, whereas healthy cells were unaffected. The drug release studies showed sustained release kinetics over several weeks. These findings elaborate the exceptional selectivity and potential of estrogen-coated nano-biolabels in efficient diagnosis and detection of breast cancer cells.
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Affiliation(s)
- Alexander M Renner
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Hans A Schlößer
- Center for Molecular Medicine Cologne, University of Cologne, Robert-Koch-Str. 21, 50931 Cologne, Germany
| | - Annika Szymura
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Stefan Roitsch
- Institute of Physical Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Kerstin Wennhold
- Center for Molecular Medicine Cologne, University of Cologne, Robert-Koch-Str. 21, 50931 Cologne, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
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12
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Szymura A, Ilyas S, Horn M, Neundorf I, Mathur S. Multivalent magnetic nanoaggregates with unified antibacterial activity and selective uptake of heavy metals and organic pollutants. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Ilyas S, Ullah NK, Ilyas M, Wennhold K, Iqbal M, Schlößer HA, Hussain MS, Mathur S. Mediating the Fate of Cancer Cell Uptake: Dual-Targeted Magnetic Nanovectors with Biotin and Folate Surface Ligands. ACS Biomater Sci Eng 2020; 6:6138-6147. [DOI: 10.1021/acsbiomaterials.0c00771] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne, Greinstraße 6, 50939 Cologne, Germany
| | - Nighat K. Ullah
- Institute of Inorganic Chemistry, University of Cologne, Greinstraße 6, 50939 Cologne, Germany
| | - Muhammad Ilyas
- Professorship for Population Genetics, Department of Life Science Systems, Technical University of Munich, Liesel-Beckmann Straße 2, 85354 Freising, Germany
| | - Kerstin Wennhold
- Center for Molecular Medicine Cologne and Translational Immunology, University Hospital Cologne, 50931 Cologne, Germany
- Medical Microbiology, Immunology and Hygiene, University Hospital Cologne, Goldenfelsstraße 19-21, 50935 Cologne, Germany
| | - Maria Iqbal
- Institute of Biochemistry I, Center for Molecular Medicine, University of Cologne, Joseph-Stelzmann-Straße 52, 50931 Cologne, Germany
- Cologne Center for Genomics (CCG), University of Cologne, Weyertal 115b, 50931 Cologne, Germany
| | - Hans A. Schlößer
- Center for Molecular Medicine Cologne and Translational Immunology, University Hospital Cologne, 50931 Cologne, Germany
- Medical Microbiology, Immunology and Hygiene, University Hospital Cologne, Goldenfelsstraße 19-21, 50935 Cologne, Germany
| | - Muhammad S. Hussain
- Institute of Biochemistry I, Center for Molecular Medicine, University of Cologne, Joseph-Stelzmann-Straße 52, 50931 Cologne, Germany
- Cologne Center for Genomics (CCG), University of Cologne, Weyertal 115b, 50931 Cologne, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstraße 6, 50939 Cologne, Germany
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14
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Alyas S, Roohi N, Ahmed S, Ashraf S, Ilyas S, Ilyas A. Lower vitamin D and sex hormone binding globulin levels and higher progesterone, cortisol and t-PA levels in early second trimester are associated with higher risk of developing gestational diabetes mellitus. J BIOL REG HOMEOS AG 2020; 34:51. [PMID: 32103657 DOI: 10.23812/20-35-l] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- S Alyas
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
- Institute of Molecular Biology and Biotechnology (IMBB), University of Lahore, Punjab, Pakistan
| | - N Roohi
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
| | - S Ahmed
- King Edward Medical University, Neela Gumbad, Anarkali, Lahore, Punjab, Pakistan
| | - S Ashraf
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
| | - S Ilyas
- Department of Pediatrics, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - A Ilyas
- Bio-nanotechnology and Biomaterials (BNB) Lab
- Department of Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY, United States
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15
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Abstract
We demonstrate here a controlled assembly of individual nanoscale building blocks into defined architectures based on chemospecific covalent bonding interactions. For this purpose, α-Fe2O3, γ-Fe2O3, and SiO2 nanoparticles decorated with surface-conjugated organic ligands were used for performing on-surface Diels-Alder reactions. Driven through their chemical affinity and surface-grafted complementary functionalities, nanoparticles underwent click-reactions to produce covalently organized nanostructures. An advantage of using the Diels-Alder reaction is its reversible nature, which was used to click and unclick the nanoparticles on demand. The efficiency and chemical specificity of this approach opens up another synthetic access to unify materials with complementary properties, where the thermoresponsive nature of particle assemblies imparts to them a fully reversible character. The covalent conjugation strategies demonstrated in this work potentially allow the use of a diverse range of particles and ligands for their applications in different disciplines such as medicine, optics, or photonics. The nanoparticles morphology and crystalline nature were investigated by TEM and XRD analysis, while the presence of surface attached groups was verified by NMR, FTIR, UV-vis, and ζ potential measurements.
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Affiliation(s)
- Markus B Schütz
- Institute of Inorganic Chemistry , University of Cologne , Greinstraße 6 , 50939 Cologne , Germany
| | - Khan Lê
- Institute of Inorganic Chemistry , University of Cologne , Greinstraße 6 , 50939 Cologne , Germany
| | - Shaista Ilyas
- Institute of Inorganic Chemistry , University of Cologne , Greinstraße 6 , 50939 Cologne , Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry , University of Cologne , Greinstraße 6 , 50939 Cologne , Germany
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16
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Zare M, Namratha K, Ilyas S, Hezam A, Mathur S, Byrappa K. Smart Fortified PHBV-CS Biopolymer with ZnO-Ag Nanocomposites for Enhanced Shelf Life of Food Packaging. ACS Appl Mater Interfaces 2019; 11:48309-48320. [PMID: 31774258 DOI: 10.1021/acsami.9b15724] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Thymus vulgaris leaf extract was used as a stabilizer and reducing agent in the green, facile, and biomimetic hydrothermal decomposition reaction for the fabrication of zinc oxide-silver nanocomposites (ZnO-Ag NCs). The nanocomposite (NC) as an active agent was integrated into poly(3-hydroxybutyrate-co-3-hydroxyvalerate)-chitosan (PHBV-CS) in a highly precise ratio of solvent mixture by ultrasonication without the aid of any coupling agent to fabricate the novel degradable biopolymer (BP) nanocomposite via solvent casting method to enhance the mechanical properties and antimicrobial activity and with the lowest immigration rate to improve the shelf life of poultry items. The ZnO-Ag NCs as a nanoactive agent in the food packaging preserved food safety by controlling its spoilage. The morphology, physical, mechanical, barrier, antibacterial, and migration properties of the nanocrystals were assessed via several characterization methods to show the enhancement of the prepared polymer in various aspects of properties. The NCs BP were used for potential sensory evaluation of chicken breast refrigerated over a period of 15 days. The data demonstrated that these bio-based nanocomposites show great antimicrobial activity that offers perspectives for the replacement of traditional petrochemical-based polymers currently used for food packaging of poultry items.
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Affiliation(s)
- Mina Zare
- Institute of Inorganic Chemistry , University of Cologne , D-50939 Cologne , Germany
| | | | - Shaista Ilyas
- Institute of Inorganic Chemistry , University of Cologne , D-50939 Cologne , Germany
| | | | - Sanjay Mathur
- Institute of Inorganic Chemistry , University of Cologne , D-50939 Cologne , Germany
| | - Kullaiah Byrappa
- Adichunchanagiri University , B.G. Nagara 571448 , Mandya District, India
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17
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Ashraf S, Roohi N, Alyas S, Ilyas S, Ashraf Y. LC-MS/MS analysis reveals placental differential expression of chorionic somatomammotropin hormone/human growth hormone in pregnancies with gestational diabetes mellitus. J BIOL REG HOMEOS AG 2019; 33:1823-1828. [PMID: 31842532 DOI: 10.23812/19-366-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- S Ashraf
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan.,Department of Biological Sciences, Purdue University, West Lafayette, IN, USA
| | - N Roohi
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
| | - S Alyas
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan.,Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Punjab, Pakistan
| | - S Ilyas
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
| | - Y Ashraf
- Physiology/Endocrinology Laboratory, Department of Zoology, University of the Punjab, Lahore, Punjab, Pakistan
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18
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Dalili D, Ilyas S, Monzon L, Malhotra B, Butler D, Fedele F, Bosio F, Kelly P, Adam A, Gangi A. Challenges of Recruitment to Interventional MSK Oncology in Palliative Care – Focus on MRI Guided High Intensity Focused Ultrasound (MRg-HIFU) for Treating Skeletal Metastasis. Semin Musculoskelet Radiol 2019. [DOI: 10.1055/s-0039-1692582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Jaber N, Hafiz MAA, Kazmi SNR, Hasan MH, Alsaleem F, Ilyas S, Younis MI. Efficient Excitation of Micro/Nano Resonators and Their Higher Order Modes. Sci Rep 2019; 9:319. [PMID: 30670731 PMCID: PMC6342917 DOI: 10.1038/s41598-018-36482-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 08/19/2018] [Accepted: 11/23/2018] [Indexed: 11/22/2022] Open
Abstract
We demonstrate a simple and flexible technique to efficiently activate micro/nano-electromechanical systems (MEMS/NEMS) resonators at their fundamental and higher order vibration modes. The method is based on the utilization of the amplified voltage across an inductor, L, of an LC tank resonant circuit to actuate the MEMS/NEMS resonator. By matching the electrical and mechanical resonances, significant amplitude amplification is reported across the resonators terminals. We show experimentally amplitude amplification up to twelve times, which is demonstrated to efficiently excite several vibration modes of a microplate MEMS resonator and the fundamental mode of a NEMS resonator.
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Affiliation(s)
- N Jaber
- Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - M A A Hafiz
- Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - S N R Kazmi
- Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - M H Hasan
- Durham School of Architectural Engineering and Construction, University of Nebraska Lincoln, Lincoln, Nebraska, 68182-0816, USA
| | - F Alsaleem
- Durham School of Architectural Engineering and Construction, University of Nebraska Lincoln, Lincoln, Nebraska, 68182-0816, USA
| | - S Ilyas
- Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - M I Younis
- Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
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20
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Withey S, Gariani J, Reddy K, Prezzi D, Kelly-Morland C, Ilyas S, Adam A, Goh V. Corrigendum to “Is there a role for perfusion imaging in assessing treatment response following ablative therapy of small renal masses—A systematic review” [Eur. J. Radiol. Open 5 (2018) 102–107]. Eur J Radiol Open 2019; 6:e1. [PMID: 31886320 PMCID: PMC6921305 DOI: 10.1016/j.ejro.2019.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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21
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Rosen SA, Olson TJP, Peter SD, Ilyas S, Tripathi S. Robotic-assisted subtotal colectomy for synchronous colon cancers in a patient with indeterminate colitis - a video vignette. Colorectal Dis 2018; 20:1153-1154. [PMID: 30238595 DOI: 10.1111/codi.14426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 09/10/2018] [Indexed: 02/08/2023]
Affiliation(s)
- S A Rosen
- Department of Surgery, Emory University School of Medicine, Atlanta, Georgia, USA
| | - T J P Olson
- Department of Surgery, Emory University School of Medicine, Atlanta, Georgia, USA
| | - S D Peter
- Department of Radiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - S Ilyas
- Department of Pathology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - S Tripathi
- Department of Surgery, Emory University School of Medicine, Atlanta, Georgia, USA
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22
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Withey SJ, Gariani J, Reddy K, Prezzi D, Kelly-Morland C, Ilyas S, Adam A, Goh V. Is there a role for perfusion imaging in assessing treatment response following ablative therapy of small renal masses-A systematic review. Eur J Radiol Open 2018; 5:102-107. [PMID: 30094296 PMCID: PMC6077124 DOI: 10.1016/j.ejro.2018.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Accepted: 07/02/2018] [Indexed: 12/01/2022] Open
Abstract
Aims Ablation therapies are an innovative nephron-sparing alternative to radical nephrectomy for early stage renal cancers, although determination of treatment success is challenging. We aimed to undertake a systematic review of the literature to determine whether assessment of tumour perfusion may improve response assessment or alter clinical management when compared to standard imaging. Material and Methods Two radiologists performed independent primary literature searches for perfusion imaging in response assessment following ablative therapies (radiofrequency ablation and cryotherapy) focused on renal tumours. Results 5 of 795 articles were eligible, totaling 110 patients. The study designs were heterogeneous with different imaging techniques, perfusion calculations, reference standard and follow-up periods. All studies found lower perfusion following treatment, with a return of ‘high grade’ perfusion in the 7/110 patients with residual or recurrent tumour. One study found perfusion curves were different between successfully ablated regions and residual tumour. Conclusions Studies were limited by small sample size and heterogeneous methodology. No studies have investigated the impact of perfusion imaging on management. This review highlights the current lack of evidence for perfusion imaging in response assessment following renal ablation, however it suggests that there may be a future role. Further prospective research is required to address this.
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Affiliation(s)
- S J Withey
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - J Gariani
- Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - K Reddy
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - D Prezzi
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - C Kelly-Morland
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - S Ilyas
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - A Adam
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
| | - V Goh
- Department of Radiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.,Cancer Imaging, Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom
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23
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Twigg M, Ilyas S, Kearns T, Zaki D, Grimes L. The provision of patient-centred care: A qualitative analysis of community pharmacists’ views after consultation skills training. Res Social Adm Pharm 2018. [DOI: 10.1016/j.sapharm.2018.05.027] [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: 11/26/2022]
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24
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Gessner I, Krakor E, Jurewicz A, Wulff V, Kling L, Christiansen S, Brodusch N, Gauvin R, Wortmann L, Wolke M, Plum G, Schauss A, Krautwurst J, Ruschewitz U, Ilyas S, Mathur S. Hollow silica capsules for amphiphilic transport and sustained delivery of antibiotic and anticancer drugs. RSC Adv 2018; 8:24883-24892. [PMID: 35542120 PMCID: PMC9082457 DOI: 10.1039/c8ra03716g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/21/2018] [Indexed: 11/21/2022] Open
Abstract
Hollow mesoporous silica capsules were used as amphiphilic drug delivery vehicles and sustained release systems for antimicrobial and anticancer drugs.
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25
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Mahmood T, Anwar F, Afzal N, Kausar R, Ilyas S, Shoaib M. Influence of ripening stages and drying methods on polyphenolic content and antioxidant activities of mulberry fruits. Food Measure 2017. [DOI: 10.1007/s11694-017-9602-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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PARTHIPUN A, Ilyas S, Thulasidasan N, Sabharwal T. Prostate artery embolisation: initial experience and outcome for the treatment of benign prostate hyperplasia at a single institution. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.153] [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: 11/29/2022] Open
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27
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Ilyas S, Thulasidasan N, PARTHIPUN A, Sabharwal T. Prostate artery embolization (PAE): the tricks to success. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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28
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Ng I, Segal R, Lee KL, Ilyas S, Story D. A prospective audit of difficult airway equipment at University of Melbourne-affiliated hospitals. Anaesth Intensive Care 2015; 43:528. [PMID: 26099768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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29
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Ilyas S, Shaida N, Thakor A, Winterbottom A, Cousins C. Endovascular aneurysm repair (EVAR) follow-up imaging: the assessment and treatment of common postoperative complications. Clin Radiol 2015; 70:183-96. [DOI: 10.1016/j.crad.2014.09.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 09/04/2014] [Accepted: 09/12/2014] [Indexed: 10/24/2022]
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30
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Ilyas S. Re: Junior Radiologists' Forum (JRF): national trainee survey. A reply. Clin Radiol 2014; 69:1313-4. [PMID: 25300559 DOI: 10.1016/j.crad.2014.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 09/05/2014] [Indexed: 11/29/2022]
Affiliation(s)
- S Ilyas
- Addenbrooke's Hospital, Cambridge, UK.
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31
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Wortmann L, Ilyas S, Niznansky D, Valldor M, Arroub K, Berger N, Rahme K, Holmes J, Mathur S. Bioconjugated iron oxide nanocubes: synthesis, functionalization, and vectorization. ACS Appl Mater Interfaces 2014; 6:16631-16642. [PMID: 25184762 DOI: 10.1021/am503068r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A facile bottom-up approach for the synthesis of inorganic/organic bioconjugated nanoprobes based on iron oxide nanocubes as the core with a nanometric silica shell is demonstrated. Surface coating and functionalization protocols developed in this work offered good control over the shell thickness (8-40 nm) and enabled biovectorization of SiO2@Fe3O4 core-shell structures by covalent attachment of folic acid (FA) as a targeting unit for cellular uptake. The successful immobilization of folic acid was investigated both quantitatively (TGA, EA, XPS) and qualitatively (AT-IR, UV-vis, ζ-potential). Additionally, the magnetic behavior of the nanocomposites was monitored after each functionalization step. Cell viability studies confirmed low cytotoxicity of FA@SiO2@Fe3O4 conjugates, which makes them promising nanoprobes for targeted internalization by cells and their imaging.
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Affiliation(s)
- Laura Wortmann
- Institute of Inorganic Chemistry, University of Cologne , Greinstrasse 6, Cologne 50939, Germany
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32
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Ilyas S, Beattie A, Pettet G, Kharay A, Hedayati V, Hameed S, McCleery M, Papadakos N, Chari B. Junior Radiologists' Forum (JRF): National trainee survey. Clin Radiol 2014; 69:952-8. [DOI: 10.1016/j.crad.2014.04.022] [Citation(s) in RCA: 7] [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] [Received: 02/05/2014] [Revised: 04/03/2014] [Accepted: 04/25/2014] [Indexed: 11/25/2022]
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33
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Raccis R, Wortmann L, Ilyas S, Schläfer J, Mettenbörger A, Mathur S. Dipole-induced conductivity enhancement by n-type inclusion in a p-type system: α-Fe₂O₃-PEDOT:PSS nanocomposites. Phys Chem Chem Phys 2014; 16:15597-607. [PMID: 24955728 DOI: 10.1039/c4cp01093k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hematite (α-Fe2O3) nanoparticles of two different shapes but of same size (ca. 40 nm) were dispersed in PEDOT:PSS matrices in various concentration ranges (0-7 wt%) to study the consequent changes in conductivity in the dark and under solar illumination conditions. Within a distinct range of concentration, a distinct increase in the conductivity was observed for both spherical and cubical particle population. We ascribed this effect to the generalized Poole-Frenkel theory of conduction in conjunction with the basic depletion width properties of heterojunctions and electrostatic dipole moments, and verified our assumptions through data fitting. A difference in conductivity between sphere- and cube-based α-Fe2O3-PEDOT:PSS nanocomposites was also observed and ascribed to the electrostatic edge effect on the nanoparticles. The dispersion of α-Fe2O3 nanocrystals was confirmed by high-resolution electron microscopy, whereas the electrical properties and modulations thereof were followed by recording current-voltage characteristics.
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Affiliation(s)
- R Raccis
- Institute for Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany.
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Ilyas S, Symons J, Bradley WPL, Segal R, Taylor H, Lee K, Balkin M, Bain C, Ng I. A prospective randomised controlled trial comparing tracheal intubation plus manual in-line stabilisation of the cervical spine using the Macintosh laryngoscope vs the McGrath®Series 5 videolaryngoscope. Anaesthesia 2014; 69:1345-50. [DOI: 10.1111/anae.12804] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2014] [Indexed: 12/23/2022]
Affiliation(s)
- S. Ilyas
- Department of Anaesthesia and Pain Management; Royal Melbourne Hospital and University of Melbourne; Melbourne Victoria Australia
| | - J. Symons
- Department of Anaesthesia and Perioperative Medicine; The Alfred and Monash University; Melbourne Victoria Australia
| | - W. P. L. Bradley
- Department of Anaesthesia and Perioperative Medicine; The Alfred and Monash University; Melbourne Victoria Australia
| | - R. Segal
- Department of Anaesthesia and Pain Management; Royal Melbourne Hospital and University of Melbourne; Melbourne Victoria Australia
| | - H. Taylor
- Department of Anaesthesia and Pain Management; Royal Melbourne Hospital and University of Melbourne; Melbourne Victoria Australia
| | - K. Lee
- Department of Anaesthesia and Pain Management; Royal Melbourne Hospital and University of Melbourne; Melbourne Victoria Australia
| | - M. Balkin
- Department of Anaesthesia and Perioperative Medicine; The Alfred and Monash University; Melbourne Victoria Australia
| | - C. Bain
- Department of Anaesthesia and Perioperative Medicine; The Alfred and Monash University; Melbourne Victoria Australia
| | - I. Ng
- Department of Anaesthesia and Pain Management; Royal Melbourne Hospital and University of Melbourne; Melbourne Victoria Australia
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Ilyas S, Ilyas M, van der Hoorn RAL, Mathur S. Selective conjugation of proteins by mining active proteomes through click-functionalized magnetic nanoparticles. ACS Nano 2013; 7:9655-9663. [PMID: 24143894 DOI: 10.1021/nn402382g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIONs) coated with azide groups were functionalized at the surface with biotin (biotin@SPIONs) and cysteine protease inhibitor E-64 (E-64@SPIONs) with the purpose of developing nanoparticle-based assays for identifying cysteine proteases in proteomes. Magnetite particles (ca. 6 nm) were synthesized by microwave-assisted thermal decomposition of iron acetylacetonate and subsequently functionalized following a click chemistry protocol to obtain biotin and E-64 labeled particulate systems. Successful surface modification and covalent attachment of functional groups and molecules were confirmed by FT-IR spectroscopy and thermal gravimetric analysis. The ability of the surface-grafted biotin terminal groups to specifically interact with streptavidin (either horseradish peroxidase [(HRP)-luminol-H2O2] or rhodamine) was confirmed by chemiluminescent assay. A quantitative assessment showed a capture limit of 0.55-1.65 μg protein/100 μg particles. Furthermore, E-64@SPIONs were successfully used to specifically label papain-like cysteine proteases from crude plant extracts. Owing to the simplicity and versatility of the technique, together with the superparamagnetic behavior of FeOx-nanoparticles, the results demonstrate that click chemistry on surface anchored azide group is a viable approach toward bioconjugations that can be extended to other nanoparticles surfaces with different functional groups to target specific therapeutic and diagnostic applications.
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Affiliation(s)
- Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne , Greinstraße 6, D-50939 Cologne, Germany
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Anwar A, van der Zouwen PS, Ilyas S, van der Wolf JM. Bacterial Canker (Clavibacter michiganensis subsp. michiganensis) of Tomato in Commercial Seed Produced in Indonesia. Plant Dis 2004; 88:680. [PMID: 30812593 DOI: 10.1094/pdis.2004.88.6.680a] [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] [Indexed: 06/09/2023]
Abstract
In 2002, Clavibacter michiganensis subsp. michiganensis (Smith) Davis, the causal organism of bacterial canker of tomato (Lycopersicon esculentum), was isolated from two of six commercial asymptomatic tomato seed lots produced on Java in Indonesia. C. michiganensis subsp. michiganensis has not been reported in Indonesia previously. Methods based on the protocol of the International Seed Health Initiative were used to extract and identify the presence of C. michiganensis subsp. michiganensis in tomato seed. C. michiganensis subsp. michiganensis was isolated with dilution plating on the semiselective media D2ANX and mSCM. The identity of the colonies was confirmed by immunofluorescence microscopy, polymerase chain reaction (2), fatty methyl ester analysis, enzyme-linked immunosorbent assay based on monoclonal antibody 103 (1), and a pathogenicity test in which three replicate tomato plants were stem inoculated with 108 cells ml-1. Within 2 weeks, stripes on stems developed that split and exposed reddish brown cavities (stem cankers). The presence of C. michiganensis subsp. michiganensis poses a direct threat on tomato production, which is one of five economically most important vegetable crops in Indonesia. References: (1) A. Alvarez et al. Phytopathology 83:1405, 1993. (2) M. S. Santos et al. Seed Sci. Technol. 25:581, 1997.
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Affiliation(s)
- A Anwar
- Institut Pertanian Bogor, Jl, Raya Pajajaran, Bogor, Indonesia
| | - P S van der Zouwen
- Plant Research International, P.O. Box 16, 6700 AA Wageningen, the Netherlands
| | - S Ilyas
- Institut Pertanian Bogor, Jl, Raya Pajajaran, Bogor, Indonesia
| | - J M van der Wolf
- Plant Research International, P.O. Box 16, 6700 AA Wageningen, the Netherlands
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Abstract
A small group of patients with complex head and neck cancer present with problems of wound healing following radiotherapy and reconstructive surgery. Provision of skin cover to the neck in these cases is often required and presents a challenge to the reconstructive surgeon. We present the use of a pedicled scalp flap based on the occipital artery for such defects. This flap is an axial patterned scalp flap incorporating hair-bearing skin. It may be up to 15 cm wide and can reach beyond the midline of the chin. The anatomy of the flap is described and its use illustrated in three cases. This flap is a useful addition to the options for reconstruction of neck defects in patients with head and neck cancer.
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Affiliation(s)
- D C Floyd
- Department of Plastic and Reconstructive Surgery, Royal Free Hospital, Pond Street, NW3 2QG, London, UK
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Khan AA, Ilyas S, Ptasznik W. Integrating low water potential seed hydration with other treatments to improve cold tolerance. Ann Bot 1995; 75:13-9. [PMID: 21247908 PMCID: PMC3023659 DOI: 10.1016/s0305-7364(05)80004-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/1993] [Accepted: 07/28/1994] [Indexed: 05/23/2023]
Abstract
Matriconditioning improved the performance of pepper, tomato, sweet corn, snap bean, table beet, sugar beet and watermelon seeds in early field plantings at suboptimal temperatures (averaged over 10 d after planting) ranging from 12 to 18 °C. Reduction in the time to 50% (T(50)) emergence in conditioned seeds ranged from 0·6 d in watermelon to 3·3 d in pepper and improvement in emergence from 10% in sugar beet to 30% in table beet. Further improvement in emergence occurred by inclusion of pesticides and/or gibberellin during conditioning. A 4 d conditioning of pepper at 25 °C was superior to 7 d conditioning at 15 °C in seeds germinated at 15 °C on filter paper, but 15 °C conditioning was superior in improving percentage emergence in early field plantings. Tomato seeds conditioned at 15 or 25 °C performed equally well in the field. A 2 d conditioning was superior to 1 d conditioning in improving the performance of supersweet sweet corn cultivars grown in a growth chamber at 10/20 °C. The water uptake rate in the presence of Micro-Cel E during matriconditioning of sweet corn seeds was slower than when the seeds were exposed to the same amount of water in absence of the carrier. Electrolyte leakage was greater in supersweet 'Challenger' sweet corn seeds carrying the sh(2) gene compared to the sugary type sweet corn 'More', and in both cases matriconditioning reduced the leakage. Lettuce seeds matriconditioned for 24 h had higher 1-aminocyclopropane-l-carboxylic acid (ACC) content, developed greater ACC oxidase activity and performed better at 10 °C (germinated earlier and had higher percentage germination) than the untreated seeds. Matriconditioning appears to bring about beneficial physical, physiological and biochemical changes that seemingly improve embryo growth potential and tolerance to low temperatures.
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Affiliation(s)
- A A Khan
- Department of Horticultural Sciences, New York State Agricultural Experiment Station, Cornell University, Geneva, NY 14456, USA
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Abstract
This paper reports our experience of the use of polythene sheet as a temporary dressing for excised wounds. A prospective randomised double-blind trial was conducted to see whether or not polythene dressing was less painful to remove than our traditional dressing of Jelonet. Polythene was found to be less painful (p less than 0.01). Other advantages of the use of polythene are presented.
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Affiliation(s)
- V Lees
- Department of Plastic Surgery, Frenchay Hospital, Bristol
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