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Vinnacombe-Willson GA, Lee JK, Chiang N, Scarabelli L, Yue S, Foley R, Frost I, Weiss PS, Jonas SJ. Exploring the Bottom-Up Growth of Anisotropic Gold Nanoparticles from Substrate-Bound Seeds in Microfluidic Reactors. ACS Appl Nano Mater 2023; 6:6454-6460. [PMID: 37152920 PMCID: PMC10152454 DOI: 10.1021/acsanm.3c00440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/29/2023] [Indexed: 05/09/2023]
Abstract
We developed an unconventional seed-mediated in situ synthetic method, whereby gold nanostars are formed directly on the internal walls of microfluidic reactors. The dense plasmonic substrate coatings were grown in microfluidic channels with different geometries to elucidate the impacts of flow rate and profile on reagent consumption, product morphology, and density. Nanostar growth was found to occur in the flow-limited regime and our results highlight the possibility of creating shape gradients or incorporating multiple morphologies in the same microreactor, which is challenging to achieve with traditional self-assembly. The plasmonic-microfluidic platforms developed herein have implications for a broad range of applications, including cell culture/sorting, catalysis, sensing, and drug/gene delivery.
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Affiliation(s)
- Gail A. Vinnacombe-Willson
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
| | - Joy K. Lee
- Department
of Pediatrics, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Naihao Chiang
- Department
of Chemistry, University of Houston, Houston, Texas 77004, United States
| | - Leonardo Scarabelli
- Institute
of Materials Science of Barcelona, ICMAB-CSIC, Campus UAB, Bellaterra 08193 Spain
| | - Shouzheng Yue
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Ruth Foley
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Isaura Frost
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Paul S. Weiss
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Department
of Materials Science and Engineering, University
of California, Los Angeles, Los Angeles, California 90095, United States
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Steven J. Jonas
- Department
of Pediatrics, University of California,
Los Angeles, Los Angeles, California 90095, United States
- California
NanoSystems Institute, University of California,
Los Angeles, Los Angeles, California 90095, United States
- Eli
& Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, California 90095, United States
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Abstract
The present communication is a preliminary report on 12 certifiedcases suffering from insanity with epilepsy treated with solantoin, a preparation of sodium diphenyl hydantoinate. This paper also discusses the site of action of the drug, and the possible relationship between its excretion and toxic effects.
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Oo ZM, Illendula A, Grembecka J, Schmidt C, Zhou Y, Esain V, Kwan W, Frost I, North TE, Rajewski RA, Speck NA, Bushweller JH. A tool compound targeting the core binding factor Runt domain to disrupt binding to CBFβ in leukemic cells. Leuk Lymphoma 2017; 59:2188-2200. [PMID: 29249175 DOI: 10.1080/10428194.2017.1410882] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The core binding factor (CBF) gene RUNX1 is a target of chromosomal translocations in leukemia, including t(8;21) in acute myeloid leukemia (AML). Normal CBF function is essential for activity of AML1-ETO, product of the t(8;21), and for survival of several leukemias lacking RUNX1 mutations. Using virtual screening and optimization, we developed Runt domain inhibitors which bind to the Runt domain and disrupt its interaction with CBFβ. On-target activity was demonstrated by the Runt domain inhibitors' ability to depress hematopoietic cell formation in zebrafish embryos, reduce growth and induce apoptosis of t(8;21) AML cell lines, and reduce progenitor activity of mouse and human leukemia cells harboring the t(8;21), but not normal bone marrow cells. Runt domain inhibitors had similar effects on murine and human T cell acute lymphocytic leukemia (T-ALL) cell lines. Our results confirmed that Runt domain inhibitors might prove efficacious in various AMLs and in T-ALL.
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Affiliation(s)
- Zaw Min Oo
- a Abramson Family Cancer Research Institute , Philadelphia , PA , USA.,b Department of Cell and Molecular Biology , University of Pennsylvania , Philadelphia , PA , USA
| | - Anuradha Illendula
- c Department of Molecular Physiology and Biological Physics , University of Virginia , Charlottesville , VA , USA
| | - Jolanta Grembecka
- d Department of Pathology , University of Michigan , Ann Arbor , MI , USA
| | - Charles Schmidt
- c Department of Molecular Physiology and Biological Physics , University of Virginia , Charlottesville , VA , USA
| | - Yunpeng Zhou
- c Department of Molecular Physiology and Biological Physics , University of Virginia , Charlottesville , VA , USA
| | - Virginie Esain
- e Department of Pathology , Beth Israel Deaconess Medical Center, Harvard Medical School , Boston , MA , USA
| | - Wanda Kwan
- e Department of Pathology , Beth Israel Deaconess Medical Center, Harvard Medical School , Boston , MA , USA
| | - Isaura Frost
- e Department of Pathology , Beth Israel Deaconess Medical Center, Harvard Medical School , Boston , MA , USA
| | - Trista E North
- e Department of Pathology , Beth Israel Deaconess Medical Center, Harvard Medical School , Boston , MA , USA
| | - Roger A Rajewski
- f Department of Pharmaceutical Chemistry , University of Kansas , Lawrence , KS , USA
| | - Nancy A Speck
- a Abramson Family Cancer Research Institute , Philadelphia , PA , USA.,b Department of Cell and Molecular Biology , University of Pennsylvania , Philadelphia , PA , USA
| | - John H Bushweller
- c Department of Molecular Physiology and Biological Physics , University of Virginia , Charlottesville , VA , USA
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Kwan W, Cortes M, Frost I, Esain V, Theodore LN, Liu SY, Budrow N, Goessling W, North TE. The Central Nervous System Regulates Embryonic HSPC Production via Stress-Responsive Glucocorticoid Receptor Signaling. Cell Stem Cell 2016; 19:370-82. [PMID: 27424782 DOI: 10.1016/j.stem.2016.06.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 05/04/2016] [Accepted: 06/10/2016] [Indexed: 01/08/2023]
Abstract
Hematopoietic stem and progenitor cell (HSPC) specification is regulated by numerous defined factors acting locally within the hemogenic niche; however, it is unclear whether production can adapt to fluctuating systemic needs. Here we show that the CNS controls embryonic HSPC numbers via the hypothalamic-pituitary-adrenal/interrenal (HPA/I) stress response axis. Exposure to serotonin or the reuptake inhibitor fluoxetine increased runx1 expression and Flk1(+)/cMyb(+) HSPCs independent of peripheral innervation. Inhibition of neuronal, but not peripheral, tryptophan hydroxlyase (Tph) persistently reduced HSPC number. Consistent with central HPA/I axis induction and glucocorticoid receptor (GR) activation, GR agonists enhanced, whereas GR loss diminished, HSPC formation. Significantly, developmental hypoxia, as indicated by Hif1α function, induced the HPA/I axis and cortisol production. Furthermore, Hif1α-stimulated HSPC enhancement was attenuated by neuronal tph or GR loss. Our data establish that embryonic HSC production responds to physiologic stress via CNS-derived serotonin synthesis and central feedback regulation to control HSC numbers.
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Affiliation(s)
- Wanda Kwan
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Mauricio Cortes
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Isaura Frost
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Virginie Esain
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Lindsay N Theodore
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Sarah Y Liu
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Nadine Budrow
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA
| | - Wolfram Goessling
- Brigham and Women's Hospital and Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA
| | - Trista E North
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA 02138, USA.
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Frost I. Die Arbeit der zahnärztlichen Dienste in den Gesundheitsämtern von Sachsen-Anhalt. Gesundheitswesen 2014. [DOI: 10.1055/s-0034-1371568] [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: 10/19/2022]
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Levy N, Frost I, Fry AC. Improving the Hospital management of Acute Kidney Injury. J Intensive Care Soc 2014. [DOI: 10.1177/175114371401500122] [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: 11/15/2022] Open
Affiliation(s)
- N Levy
- Consultant Anaesthetist and Intensivist, West Suffolk
Hospital, Bury St Edmunds nicholas
| | - I Frost
- Consultant Anaesthetist and Intensivist, West Suffolk
Hospital, Bury St Edmunds
| | - AC Fry
- Consultant Nephrologist, Addenbrooke's
Hospital, Cambridge
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Williamson DG, Sinha A, Frost I, Singh VK. Management of persistent wide QRS in flecainide overdose with magnesium sulphate. Emerg Med J 2010; 27:487-8. [DOI: 10.1136/emj.2009.081075] [Citation(s) in RCA: 7] [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: 11/04/2022]
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Frost I. Cattle and coconuts. A Veterinarian's experiences of the Seychelles. Vet Rec 1973; 93:228-33. [PMID: 4770599 DOI: 10.1136/vr.93.8.228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Frost I. Mental Hospital Service. West J Med 1953. [DOI: 10.1136/bmj.1.4821.1222] [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: 11/03/2022]
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Frost I. Artificial Partheno-genesis in Sea Urchins: A Note on an Improved Technique. Biochem J 1923; 17:418-9. [PMID: 16743198 PMCID: PMC1259365 DOI: 10.1042/bj0170418] [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: 05/09/2023]
Affiliation(s)
- I Frost
- The Department of Physiology, University of Birmingham
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