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Wright AE, Nishiyama S, Han P, Kong P, Levy M. Administration methods and dosage of poly(lactic acid)-glycol intervention to myelin oligodendrocyte glycoprotein-induced experimental autoimmune encephalitis mice. BMC Neurosci 2024; 25:16. [PMID: 38468222 DOI: 10.1186/s12868-024-00859-y] [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: 01/06/2024] [Accepted: 02/28/2024] [Indexed: 03/13/2024] Open
Abstract
BACKGROUND Myelin oligodendrocyte glycoprotein-associated disorders (MOGAD) is an autoimmune central nervous system disease. Antigen-specific immune tolerance using nanoparticles such as Polylactic-co-glycolic acid (PLGA) have recently been used as a new therapeutic tolerization approach for CNS autoimmune diseases. We examined whether MOG1-125 conjugated with PLGA could induce MOG-specific immune tolerance in an experimental autoimmune encephalitis (EAE) mouse model. EAE was induced in sixty C57BL/6 J wild-type mice using MOG1-125 peptide with complete Freund's Adjuvant. The mice were divided into 12 groups (n = 5 each) to test the ability of MOG1-125 conjugated PLGA intervention to mitigate the severity or improve the outcomes from EAE with and without rapamycin compared to antigen alone or PLGA alone. EAE score and serum MOG-IgG titers were compared among the interventions.Kindly check and confirm the processed Affiliation “4” is appropriate.I confirmed the Aff 4.Affiliation: Corresponding author information have been changed to present affiliation. Kindly check and confirm.I checked and confirmed the Corresponding author's information. RESULTS Mice with EAE that were injected intraperitoneally with MOG1-125 conjugated PLGA + rapamycin complex showed dose-dependent mitigation of EAE score. Intraperitoneal and intravenous administration resulted in similar clinical outcomes, whereas 80% of mice treated with subcutaneous injection had a recurrence of clinical score worsening after approximately 1 week. Although there was no significant difference in EAE scores between unconjugated-PLGA and MOG-conjugated PLGA, serum MOG-IgG tended to decrease in the MOG-conjugated PLGA group compared to controls. CONCLUSION Intraperitoneal administration of PLGA resulted in dose-dependent and longer-lasting immune tolerance than subcutaneous administration. The induction of immune tolerance using PLGA may represent a future therapeutic option for patients with MOGAD.
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Affiliation(s)
- Amy E Wright
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
| | - Shuhei Nishiyama
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA.
- Harvard Medical School, Boston, MA, USA.
- , Cambridge, USA.
| | | | | | - Michael Levy
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
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Nishiyama S, Seok JM, Wright AE, Lotan I, Mikami T, Drosu NC, Bobrowski-Khoury N, Anderson MR, Bilodeau PA, Schindler P, Paul F, Aoki M, Yeaman MR, Levy M. Anti-aquaporin-4 immune complex stimulates complement-dependent Th17 cytokine release in neuromyelitis optica spectrum disorders. Sci Rep 2024; 14:3146. [PMID: 38326464 PMCID: PMC10850367 DOI: 10.1038/s41598-024-53661-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 02/03/2024] [Indexed: 02/09/2024] Open
Abstract
Proinflammatory cytokines, such as (IL: interleukin) IL-6 and IL-17A, and complement fixation are critical in the immunopathogenesis of neuromyelitis optica spectrum disorders (NMOSD). Blocking the IL-6 receptor or the C5 complement pathway reduces relapse risk. However, the role of interleukin (IL)-6 and complement in aquaporin-4 (AQP4) autoimmunity remains unclear. To investigate the role of the anti-AQP4 immunoglobulin (AQP4-IgG)/AQP4 immunocomplex on the induction and profile of ex vivo cytokine and surface marker expression in peripheral blood mononuclear cells (PBMC) culture. Isolated PBMCs obtained from 18 patients with AQP4-IgG-seropositive-NMOSD (8 treatment-naive, 10 rituximab-treated) or ten healthy controls were cultured with AQP4-immunocomplex with or without complement. Changes in PBMC surface markers and cytokine expression were profiled using flow cytometry and ELISA. PBMCs derived from treatment-naive NMOSD patients stimulated with a complex mixture of serum complement proteins produced significant elevations of IL-17A and IL-6. Rituximab-treated patients also exhibited higher IL-6 but not IL-17A release. IL-6 and IL-17A elevations are not observed without complement. Co-stimulation of PBMCs with AQP4-IgG/AQP4 immunocomplex and complement prompts a Th17-biased response consistent with the inflammatory paradigm observed in NMOSD. A possible inflammation model is proposed via antigen-specific autoreactive peripheral blood cells, including NK/NKT cells.
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Affiliation(s)
- Shuhei Nishiyama
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA.
- Harvard Medical School, Boston, MA, USA.
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
- Department of Neurology, Massachusetts General Hospital, 65 Landsdowne, Lab 500, Cambridge, MA, 02139, USA.
| | - Jin Myong Seok
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
| | - Amy E Wright
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
| | - Itay Lotan
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Takahisa Mikami
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Natalia C Drosu
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
| | - Natasha Bobrowski-Khoury
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Monique R Anderson
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Philippe A Bilodeau
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Patrick Schindler
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine and Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Friedemann Paul
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine and Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Masashi Aoki
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Michael R Yeaman
- Geffen School of Medicine at UCLA, Los Angeles, CA, USA
- Division of Molecular Medicine, David Geffen School of Medicine at UCLA, Institute for Infection and Immunity, Harbor-UCLA Medical Center, Lundquist Institute at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Michael Levy
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
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Guzmán EA, Peterson TA, Wright AE. The Marine Natural Compound Dragmacidin D Selectively Induces Apoptosis in Triple-Negative Breast Cancer Spheroids. Mar Drugs 2023; 21:642. [PMID: 38132962 PMCID: PMC10871089 DOI: 10.3390/md21120642] [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: 11/14/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023] Open
Abstract
Cancer cells grown in 3D spheroid cultures are considered more predictive for clinical efficacy. The marine natural product dragmacidin D induces apoptosis in MDA-MB-231 and MDA-MB-468 triple-negative breast cancer (TNBC) spheroids within 24 h of treatment while showing no cytotoxicity against the same cells grown in monolayers and treated for 72 h. The IC50 for cytotoxicity based on caspase 3/7 cleavage in the spheroid assay was 8 ± 1 µM in MDA-MB-231 cells and 16 ± 0.6 µM in MDA-MB-468 cells at 24 h. No cytotoxicity was seen at all in 2D, even at the highest concentration tested. Thus, the IC50 for cytotoxicity in the MTT assay (2D) in these cells was found to be >75 µM at 72 h. Dragmacidin D exhibited synergy when used in conjunction with paclitaxel, a current treatment for TNBC. Studies into the signaling changes using a reverse-phase protein array showed that treatment with dragmacidin D caused significant decreases in histones. Differential protein expression was used to hypothesize that its potential mechanism of action involves acting as a protein synthesis inhibitor or a ribonucleotide reductase inhibitor. Further testing is necessary to validate this hypothesis. Dragmacidin D also caused a slight decrease in an invasion assay in the MDA-MB-231 cells, although this failed to be statistically significant. Dragmacidin D shows intriguing selectivity for spheroids and has the potential to be a treatment option for triple-negative breast cancer, which merits further research into understanding this activity.
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Affiliation(s)
- Esther A. Guzmán
- Marine Biomedical and Biotechnology Research, Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL 34946, USA; (T.A.P.); (A.E.W.)
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Guzmán EA, Peterson TA, Winder PL, Francis KT, McFarland M, Roberts JC, Sandle J, Wright AE. An Assessment of Potential Threats to Human Health from Algae Blooms in the Indian River Lagoon (USA) 2018-2021: Unique Patterns of Cytotoxicity Associated with Toxins. Toxins (Basel) 2023; 15:664. [PMID: 37999526 PMCID: PMC10675324 DOI: 10.3390/toxins15110664] [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: 09/23/2023] [Revised: 10/30/2023] [Accepted: 11/08/2023] [Indexed: 11/25/2023] Open
Abstract
The Indian River Lagoon (IRL), a 156-mile-long estuary located on the eastern coast of Florida, experiences phytoplankton bloom events due to increased seasonal temperatures coupled with anthropogenic impacts. This study aimed to gather data on the toxicity to human cells and to identify secondary metabolites found in water samples collected in the IRL. Water samples from 20 sites of the IRL were collected during the wet and dry seasons over a three-year period. A panel of cell lines was used to test cytotoxicity. Hemagglutination, hemolysis, and inhibition of protein phosphatase 2A (PP2A) were also measured. Cytotoxic blooms were seen both in the south (Microcystis) and the north (Pyrodinium) of the IRL. Each toxin induced a consistent pattern of cytotoxicity in the panel of human cell lines assayed. During blooms, cytotoxicity due to a single type of toxin is obvious from this pattern. In the absence of blooms, the cytotoxicity seen reflected either a mixture of toxins or it was caused by an unidentified toxin. These observations suggest that other toxins with the potential to be harmful to human health may be present in the IRL. Moreover, the presence of toxins in the IRL is not always associated with blooms of known toxin-producing organisms.
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Affiliation(s)
- Esther A. Guzmán
- The Florida Center for Coastal and Human Health, Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL 34946, USA; (T.A.P.); (P.L.W.); (K.T.F.); (M.M.); (J.C.R.); (J.S.); (A.E.W.)
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Nishiyama S, Wright AE, Lotan I, Mikami T, Paul F, Aoki M, Levy M. Upregulated complement receptors correlate with Fc gamma receptor 3A-positive natural killer and natural killer-T cells in neuromyelitis optica spectrum disorder. J Neuroinflammation 2022; 19:296. [PMID: 36503481 PMCID: PMC9743562 DOI: 10.1186/s12974-022-02661-1] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 11/29/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Inhibition of terminal complement in neuromyelitis optica spectrum disorder (NMOSD) using eculizumab helps prevent relapses, but the exact mechanism of action of the drug remains unclear. Similarly, genetic variants in the Fc Gamma receptor 3A (FCGR3A), also known as CD16, are correlated with outcomes in NMOSD, but the immune cells expressing those CD16 are unknown. We compared CD16 expression on immune cells modulated by complement activity in natural killer (NK) cells and natural killer-T (NKT) cells in NMOSD to disease and normal-healthy controls. METHODS Peripheral blood cell (PBMC) samples from 45 patients with NMOSD with aquaporin 4 (AQP4)-IgG, 18 disease controls, and 19 normal controls were analyzed for CD16 expression and complement receptors in vitro. RESULTS At baseline, the number of NKT cells was increased in NMOSD (p < 0.001), but the proportion that was CD16 positive was lower compared to normal and disease controls (p = 0.0012). NK cell count was normal, but the ratio that was CD16 positive was also significantly lower (p < 0.001). In both NK cells and NKT cells from NMOSD, C5 complement receptor expression was much higher than normal and disease controls (p < 0.001 for both). We also evaluated activation markers CD69 and CD83, which were also significantly higher in NK and NKT cells from NMOSD patients. FCGR3A p158 V/V genotype group in NMOSD patients showed decreased NK cell proportion with activation, and fewer CD16-expressing NKT cells than the F/F genotype group. DISCUSSION Our results support an immunopathogenesis model in which complement pathway activation in NK/NKT cells upregulates CD16 expression that binds to antibody/antigen complexes. In the context of NMOSD, these complement-sensitive cells may be responsible for the escalating autoimmune activity.
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Affiliation(s)
- Shuhei Nishiyama
- grid.32224.350000 0004 0386 9924Department of Neurology, Massachusetts General Hospital, Building 114, 16th St., Room 3150, Charlestown, MA 02129 Boston, USA ,grid.38142.3c000000041936754XHarvard Medical School, Boston, MA USA ,grid.69566.3a0000 0001 2248 6943Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Miyagi Japan
| | - Amy E. Wright
- grid.32224.350000 0004 0386 9924Department of Neurology, Massachusetts General Hospital, Building 114, 16th St., Room 3150, Charlestown, MA 02129 Boston, USA
| | - Itay Lotan
- grid.32224.350000 0004 0386 9924Department of Neurology, Massachusetts General Hospital, Building 114, 16th St., Room 3150, Charlestown, MA 02129 Boston, USA ,grid.38142.3c000000041936754XHarvard Medical School, Boston, MA USA
| | - Takahisa Mikami
- grid.32224.350000 0004 0386 9924Department of Neurology, Massachusetts General Hospital, Building 114, 16th St., Room 3150, Charlestown, MA 02129 Boston, USA ,grid.67033.310000 0000 8934 4045Department of Neurology, Tufts University School of Medicine, Boston, MA USA
| | - Friedemann Paul
- grid.6363.00000 0001 2218 4662Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine and Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Masashi Aoki
- grid.69566.3a0000 0001 2248 6943Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Miyagi Japan
| | - Michael Levy
- grid.32224.350000 0004 0386 9924Department of Neurology, Massachusetts General Hospital, Building 114, 16th St., Room 3150, Charlestown, MA 02129 Boston, USA ,grid.38142.3c000000041936754XHarvard Medical School, Boston, MA USA
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Xu D, Metz J, Harmody D, Peterson T, Winder P, Guzmán EA, Russo R, McCarthy PJ, Wright AE, Wang G. Brominated and Sulfur-Containing Angucyclines Derived from a Single Pathway: Identification of Nocardiopsistins D-F. Org Lett 2022; 24:7900-7904. [PMID: 36269561 DOI: 10.1021/acs.orglett.2c02879] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One novel brominated nocardiopsistin D (1) and two new sulfur-containing nocardiopsistins E-F (2-3) were identified from Nocardiopsis sp. HB-J378. The biosynthetic gene cluster ncd featuring a brominase was identified. Compounds 1-3 exhibited significant anti-methicillin-resistant Staphylococcus aureus (anti-MRSA) activities with minimum inhibitory concentrations (MICs) of 0.098, 3.125, and 0.195 μg/mL, respectively. The single bromination in 1 drastically enhanced the anti-MRSA activity by 128-fold without altering cell toxicity and acquired new activities against the bacterial pathogens vancomycin-resistant S. aureus (VRSA), Enterococcus faecium, and Bacillus cereus.
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Affiliation(s)
- Dongbo Xu
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
| | - Jackie Metz
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
| | - Dedra Harmody
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
| | - Tara Peterson
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
| | - Priscilla Winder
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
| | - Esther A Guzmán
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
| | - Riccardo Russo
- Regional Bio-Containment Laboratory, Department of Medicine, Rutgers University, 225 Warren Street, Newark, New Jersey 07103, United States
| | - Peter J McCarthy
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
| | - Amy E Wright
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
| | - Guojun Wang
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida 34946, United States
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Sloane KL, Mefford JA, Zhao Z, Xu M, Zhou G, Fabian R, Wright AE, Glenn S. Validation of a Mobile, Sensor-based Neurobehavioral Assessment With Digital Signal Processing and Machine-learning Analytics. Cogn Behav Neurol 2022; 35:169-178. [PMID: 35749748 DOI: 10.1097/wnn.0000000000000308] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 08/07/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The Miro Health Mobile Assessment Platform consists of self-administered neurobehavioral and cognitive assessments that measure behaviors typically measured by specialized clinicians. OBJECTIVE To evaluate the Miro Health Mobile Assessment Platform's concurrent validity, test-retest reliability, and mild cognitive impairment (MCI) classification performance. METHOD Sixty study participants were evaluated with Miro Health version V.2. Healthy controls (HC), amnestic MCI (aMCI), and nonamnestic MCI (naMCI) ages 64-85 were evaluated with version V.3. Additional participants were recruited at Johns Hopkins Hospital to represent clinic patients, with wider ranges of age and diagnosis. In all, 90 HC, 21 aMCI, 17 naMCI, and 15 other cases were evaluated with V.3. Concurrent validity of the Miro Health variables and legacy neuropsychological test scores was assessed with Spearman correlations. Reliability was quantified with the scores' intraclass correlations. A machine-learning algorithm combined Miro Health variable scores into a Risk score to differentiate HC from MCI or MCI subtypes. RESULTS In HC, correlations of Miro Health variables with legacy test scores ranged 0.27-0.68. Test-retest reliabilities ranged 0.25-0.79, with minimal learning effects. The Risk score differentiated individuals with aMCI from HC with an area under the receiver operator curve (AUROC) of 0.97; naMCI from HC with an AUROC of 0.80; combined MCI from HC with an AUROC of 0.89; and aMCI from naMCI with an AUROC of 0.83. CONCLUSION The Miro Health Mobile Assessment Platform provides valid and reliable assessment of neurobehavioral and cognitive status, effectively distinguishes between HC and MCI, and differentiates aMCI from naMCI.
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Affiliation(s)
- Kelly L Sloane
- Department of Neurology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Joel A Mefford
- Department of Neurology, University of California, Los Angeles, California
| | | | - Man Xu
- Miro Health Inc., San Francisco, California
| | | | - Rachel Fabian
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Amy E Wright
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Bone Relat RM, Winder PL, Bowden GD, Guzmán EA, Peterson TA, Pomponi SA, Roberts JC, Wright AE, O’Connor RM. High-Throughput Screening of a Marine Compound Library Identifies Anti-Cryptosporidium Activity of Leiodolide A. Mar Drugs 2022; 20:md20040240. [PMID: 35447913 PMCID: PMC9026894 DOI: 10.3390/md20040240] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/24/2022] [Accepted: 03/24/2022] [Indexed: 02/04/2023] Open
Abstract
Cryptosporidium sp. are apicomplexan parasites that cause significant morbidity and possible mortality in humans and valuable livestock. There are no drugs on the market that are effective in the population most severely affected by this parasite. This study is the first high-throughput screen for potent anti-Cryptosporidium natural products sourced from a unique marine compound library. The Harbor Branch Oceanographic Institute at Florida Atlantic University has a collection of diverse marine organisms some of which have been subjected to medium pressure liquid chromatography to create an enriched fraction library. Numerous active compounds have been discovered from this library, but it has not been tested against Cryptosporidium parvum. A high-throughput in vitro growth inhibition assay was used to test 3764 fractions in the library, leading to the identification of 23 fractions that potently inhibited the growth of Cryptosporidium parvum. Bioassay guided fractionation of active fractions from a deep-sea sponge, Leiodermatium sp., resulted in the purification of leiodolide A, the major active compound in the organism. Leiodolide A displayed specific anti-Cryptosporidium activity at a half maximal effective concentration of 103.5 nM with selectivity indexes (SI) of 45.1, 11.9, 19.6 and 14.3 for human ileocecal colorectal adenocarcinoma cells (HCT-8), human hepatocellular carcinoma cells (Hep G2), human neuroblastoma cells (SH-SY5Y) and green monkey kidney cells (Vero), respectively. The unique structure of leiodolide A provides a valuable drug scaffold on which to develop new anti-Cryptosporidium compounds and supports the importance of screening natural product libraries for new chemical scaffolds.
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Affiliation(s)
- Rachel M. Bone Relat
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, 100 Dairy Rd, Pullman, WA 99164, USA; (R.M.B.R.); (G.D.B.)
| | - Priscilla L. Winder
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (P.L.W.); (E.A.G.); (T.A.P.); (S.A.P.); (J.C.R.)
| | - Gregory D. Bowden
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, 100 Dairy Rd, Pullman, WA 99164, USA; (R.M.B.R.); (G.D.B.)
| | - Esther A. Guzmán
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (P.L.W.); (E.A.G.); (T.A.P.); (S.A.P.); (J.C.R.)
| | - Tara A. Peterson
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (P.L.W.); (E.A.G.); (T.A.P.); (S.A.P.); (J.C.R.)
| | - Shirley A. Pomponi
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (P.L.W.); (E.A.G.); (T.A.P.); (S.A.P.); (J.C.R.)
| | - Jill C. Roberts
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (P.L.W.); (E.A.G.); (T.A.P.); (S.A.P.); (J.C.R.)
| | - Amy E. Wright
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (P.L.W.); (E.A.G.); (T.A.P.); (S.A.P.); (J.C.R.)
- Correspondence: (A.E.W.); (R.M.O.)
| | - Roberta M. O’Connor
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, 100 Dairy Rd, Pullman, WA 99164, USA; (R.M.B.R.); (G.D.B.)
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, 1971 Commonwealth Ave, St Paul, MN 55108, USA
- Correspondence: (A.E.W.); (R.M.O.)
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Laureano-Rosario AE, McFarland M, Bradshaw DJ, Metz J, Brewton RA, Pitts T, Perricone C, Schreiber S, Stockley N, Wang G, Guzmán EA, Lapointe BE, Wright AE, Jacoby CA, Twardowski MS. Corrigendum to Dynamics of microcystins and saxitoxin in the Indian River Lagoon, Florida Harmful Algae 103C (2021) 102012. Harmful Algae 2021; 104:102035. [PMID: 34023077 DOI: 10.1016/j.hal.2021.102035] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Abdiel E Laureano-Rosario
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA.
| | - Malcolm McFarland
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - David J Bradshaw
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Jackie Metz
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Rachel A Brewton
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Tara Pitts
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Carlie Perricone
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Stephanie Schreiber
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Nicole Stockley
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Guojun Wang
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Esther A Guzmán
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Brian E Lapointe
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Amy E Wright
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Charles A Jacoby
- St. Johns River Water Management District, PO Box 1429, Palatka, Florida 32178, USA
| | - Michael S Twardowski
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
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Wright AE, Collins JE, Roberts B, Roberts JC, Winder PL, Reed JK, Diaz MC, Pomponi SA, Chakrabarti D. Antiplasmodial Compounds from Deep-Water Marine Invertebrates. Mar Drugs 2021; 19:md19040179. [PMID: 33805935 PMCID: PMC8064351 DOI: 10.3390/md19040179] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 01/03/2023] Open
Abstract
Novel drug leads for malaria therapy are urgently needed because of the widespread emergence of resistance to all available drugs. Screening of the Harbor Branch enriched fraction library against the Plasmodium falciparum chloroquine-resistant strain (Dd2) followed by bioassay-guided fractionation led to the identification of two potent antiplasmodials; a novel diterpene designated as bebrycin A (1) and the known C21 degraded terpene nitenin (2). A SYBR Green I assay was used to establish a Dd2 EC50 of 1.08 ± 0.21 and 0.29 ± 0.02 µM for bebrycin A and nitenin, respectively. Further analysis was then performed to assess the stage specificity of the inhibitors antiplasmodial effects on the Dd2 intraerythrocytic life cycle. Exposure to bebrycin A was found to block parasite maturation at the schizont stage if added any time prior to late schizogony at 42 hours post invasion, (HPI). In contrast, early life cycle exposure to nitenin (prior to 18 HPI) was identified as crucial to parasite inhibition, suggesting nitenin may target the maturation of the parasite during the transition from ring to early trophozoite (6–18 HPI), a novel property among known antimalarials.
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Affiliation(s)
- Amy E. Wright
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (J.C.R.); (P.L.W.); (J.K.R.); (M.C.D.); (S.A.P.)
- Correspondence: (A.E.W.); (D.C.); Tel.: +1-772-242-2459 (A.E.W.); +1-407-882-2256 (D.C.)
| | - Jennifer E. Collins
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL 32826, USA; (J.E.C.); (B.R.)
| | - Bracken Roberts
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL 32826, USA; (J.E.C.); (B.R.)
| | - Jill C. Roberts
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (J.C.R.); (P.L.W.); (J.K.R.); (M.C.D.); (S.A.P.)
| | - Priscilla L. Winder
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (J.C.R.); (P.L.W.); (J.K.R.); (M.C.D.); (S.A.P.)
| | - John K. Reed
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (J.C.R.); (P.L.W.); (J.K.R.); (M.C.D.); (S.A.P.)
| | - Maria Cristina Diaz
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (J.C.R.); (P.L.W.); (J.K.R.); (M.C.D.); (S.A.P.)
| | - Shirley A. Pomponi
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US Highway 1 North, Fort Pierce, FL 34946, USA; (J.C.R.); (P.L.W.); (J.K.R.); (M.C.D.); (S.A.P.)
| | - Debopam Chakrabarti
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL 32826, USA; (J.E.C.); (B.R.)
- Correspondence: (A.E.W.); (D.C.); Tel.: +1-772-242-2459 (A.E.W.); +1-407-882-2256 (D.C.)
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Laureano-Rosario AE, McFarland M, Bradshaw DJ, Metz J, Brewton RA, Pitts T, Perricone C, Schreiber S, Stockley N, Wang G, Guzmán EA, Lapointe BE, Wright AE, Jacoby CA, Twardowski MS. Dynamics of microcystins and saxitoxin in the Indian River Lagoon, Florida. Harmful Algae 2021; 103:102012. [PMID: 33980451 DOI: 10.1016/j.hal.2021.102012] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
Harmful algal blooms that can produce toxins are common in the Indian River Lagoon (IRL), which covers ~250 km of Florida's east coast. The current study assessed the dynamics of microcystins and saxitoxin in six segments of the IRL: Banana River Lagoon (BRL), Mosquito Lagoon (ML), Northern IRL (NIRL), Central IRL (CIRL), Southern IRL (SIRL), and the St. Lucie Estuary (SLE). Surface water samples (n = 40) collected during the 2018 wet and 2019 dry season were analyzed to determine associations between toxins and temperature, salinity, pH, oxygen saturation, concentrations of dissolved nutrients and chlorophyll-a, presence of biosynthetic genes for toxins, relative abundance of planktonic species, and composition of the microbial community. The potential toxicity of samples was assessed using multiple mammalian cell lines. Enzyme-Linked Immunosorbent Assays were used to determine concentrations of microcystins and saxitoxin. Overall, the microcystins concentration ranged between 0.01-85.70 µg/L, and saxitoxin concentrations ranged between 0.01-2.43 µg/L across the IRL. Microcystins concentrations were 65% below the limit of quantification (0.05 µg/L), and saxitoxin concentrations were 85% below the limit of detection (0.02 µg/L). Microcystins concentrations were higher in the SLE, while saxitoxin was elevated in the NIRL and BRL. Cytotoxicity related to the presence of microcystins was seen in the SLE during the wet season. No significant patterns between cytotoxicity and saxitoxin were identified. Dissolved nutrients were identified as the most highly related parameters, explaining 53% of microcystin and 47% of saxitoxin variability. Multivariate models suggested cyanobacteria, flagellates, ciliates, and diatoms as the subset of microorganisms whose abundances were maximally correlated with saxitoxin and microcystins concentrations. Lastly, biosynthetic genes for microcystins were detected in the SLE and for saxitoxin in the BRL and NIRL. These results highlight the synergistic roles environmental and biological parameters play in influencing the dynamics of toxin production by harmful algae in the IRL.
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Affiliation(s)
- Abdiel E Laureano-Rosario
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA.
| | - Malcolm McFarland
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - David J Bradshaw
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Jackie Metz
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Rachel A Brewton
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Tara Pitts
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Carlie Perricone
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Stephanie Schreiber
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Nicole Stockley
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Guojun Wang
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Esther A Guzmán
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Brian E Lapointe
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Amy E Wright
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
| | - Charles A Jacoby
- St. Johns River Water Management District, PO Box 1429, Palatka, Florida 32178, USA
| | - Michael S Twardowski
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 N, Fort Pierce, Florida 34946, USA
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Guzmán EA, Pitts TP, Tandberg KR, Winder PL, Wright AE. Discovery of Survivin Inhibitors Part 1: Screening the Harbor Branch Pure Compound Library. Mar Drugs 2021; 19:md19020073. [PMID: 33573152 PMCID: PMC7911841 DOI: 10.3390/md19020073] [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: 12/16/2020] [Revised: 01/23/2021] [Accepted: 01/24/2021] [Indexed: 12/14/2022] Open
Abstract
Survivin is a 16.5 KDa protein whose functions include promoting cellular mitosis, angiogenesis, and senescence as well as inhibiting apoptosis. Higher survivin expression is found in cancer tissues than normal tissues, and this expression correlates with disease progression and aggressiveness. Survivin has been validated as a clinical target for cancer. Small molecules are important antagonists of survivin levels in cancer cells. A structurally diverse library of genetically encoded small molecules (natural products) derived from marine plants, invertebrates, and microbes was screened for their ability to reduce expression levels of survivin in the DLD-1 colon adenocarcinoma and the A549 nonsmall cell lung carcinoma cell lines. This led to the identification of this novel activity for the known compounds eryloside E, ilicicolin H, tanzawaic acid A, and p-hydroxyphenopyrrozin. Both eryloside E and ilicicolin H showed the ability to reduce survivin expression in the low micromolar range against both cell lines.
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Sheppard SM, Keator LM, Breining BL, Wright AE, Saxena S, Tippett DC, Hillis AE. Right hemisphere ventral stream for emotional prosody identification: Evidence from acute stroke. Neurology 2019; 94:e1013-e1020. [PMID: 31892632 DOI: 10.1212/wnl.0000000000008870] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 09/04/2019] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE To determine whether right ventral stream and limbic structures (including posterior superior temporal gyrus [STG], STG, temporal pole, inferior frontal gyrus pars orbitalis, orbitofrontal cortex, amygdala, anterior cingulate, gyrus, and the sagittal stratum) are implicated in emotional prosody identification. METHODS Patients with MRI scans within 48 hours of unilateral right hemisphere ischemic stroke were enrolled. Participants were presented with 24 sentences with neutral semantic content spoken with happy, sad, angry, afraid, surprised, or bored prosody and chose which emotion the speaker was feeling based on tone of voice. Multivariable linear regression was used to identify individual predictors of emotional prosody identification accuracy from a model, including percent damage to proposed right hemisphere structures, age, education, and lesion volume across all emotions (overall emotion identification) and 6 individual emotions. Patterns of recovery were also examined at the chronic stage. RESULTS The overall emotion identification model was significant (adjusted r 2 = 0.52; p = 0.043); greater damage to right posterior STG (p = 0.038) and older age (p = 0.009) were individual predictors of impairment. The model for recognition of fear was also significant (adjusted r 2 = 0.77; p = 0.002), with greater damage to right amygdala (p = 0.047), older age (p < 0.001), and less education (p = 0.005) as individual predictors. Over half of patients with chronic stroke had residual impairments. CONCLUSIONS Right posterior STG in the right hemisphere ventral stream is critical for emotion identification in speech. Patients with stroke with damage to this area should be assessed for emotion identification impairment.
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Affiliation(s)
- Shannon M Sheppard
- From the Departments of Neurology (S.M.S., L.M.K., B.L.B., A.E.W., S.S., D.C.T., A.E.H.), Physical Medicine and Rehabilitation (D.C.T., A.E.H.), and Otolaryngology-Head and Neck Surgery (D.C.T.), Johns Hopkins University School of Medicine; and Department of Cognitive Science (A.E.H.), Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD.
| | - Lynsey M Keator
- From the Departments of Neurology (S.M.S., L.M.K., B.L.B., A.E.W., S.S., D.C.T., A.E.H.), Physical Medicine and Rehabilitation (D.C.T., A.E.H.), and Otolaryngology-Head and Neck Surgery (D.C.T.), Johns Hopkins University School of Medicine; and Department of Cognitive Science (A.E.H.), Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD
| | - Bonnie L Breining
- From the Departments of Neurology (S.M.S., L.M.K., B.L.B., A.E.W., S.S., D.C.T., A.E.H.), Physical Medicine and Rehabilitation (D.C.T., A.E.H.), and Otolaryngology-Head and Neck Surgery (D.C.T.), Johns Hopkins University School of Medicine; and Department of Cognitive Science (A.E.H.), Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD
| | - Amy E Wright
- From the Departments of Neurology (S.M.S., L.M.K., B.L.B., A.E.W., S.S., D.C.T., A.E.H.), Physical Medicine and Rehabilitation (D.C.T., A.E.H.), and Otolaryngology-Head and Neck Surgery (D.C.T.), Johns Hopkins University School of Medicine; and Department of Cognitive Science (A.E.H.), Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD
| | - Sadhvi Saxena
- From the Departments of Neurology (S.M.S., L.M.K., B.L.B., A.E.W., S.S., D.C.T., A.E.H.), Physical Medicine and Rehabilitation (D.C.T., A.E.H.), and Otolaryngology-Head and Neck Surgery (D.C.T.), Johns Hopkins University School of Medicine; and Department of Cognitive Science (A.E.H.), Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD
| | - Donna C Tippett
- From the Departments of Neurology (S.M.S., L.M.K., B.L.B., A.E.W., S.S., D.C.T., A.E.H.), Physical Medicine and Rehabilitation (D.C.T., A.E.H.), and Otolaryngology-Head and Neck Surgery (D.C.T.), Johns Hopkins University School of Medicine; and Department of Cognitive Science (A.E.H.), Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD
| | - Argye E Hillis
- From the Departments of Neurology (S.M.S., L.M.K., B.L.B., A.E.W., S.S., D.C.T., A.E.H.), Physical Medicine and Rehabilitation (D.C.T., A.E.H.), and Otolaryngology-Head and Neck Surgery (D.C.T.), Johns Hopkins University School of Medicine; and Department of Cognitive Science (A.E.H.), Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD
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Tippett DC, Breining B, Goldberg E, Meier E, Sheppard SM, Sherry E, Stockbridge M, Suarez A, Wright AE, Hillis AE. Visuomotor Figure Construction and Visual Figure Delayed Recall and Recognition in Primary Progressive Aphasia. Aphasiology 2019; 34:1456-1470. [PMID: 33281269 PMCID: PMC7716596 DOI: 10.1080/02687038.2019.1670330] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 09/09/2019] [Indexed: 06/11/2023]
Abstract
BACKGROUND Individuals with primary progressive aphasia (PPA) develop visuospatial deficits over time, and those with logopenic variant (lvPPA) are at greatest risk of developing such deficits. However, not all previous studies of visuospatial deficits in PPA have ensured equivalent duration of disease across variants and few have measured deficits longitudinally. AIMS The aims of our study were to: 1) investigate differences in baseline visuomotor figure construction, visual figure delayed recall, and figure recognition in PPA variants with similar symptom duration at baseline, and 2) explore patterns of decline in these areas. METHODS & PROCEDURES Ninety-three individuals with PPA [39 lvPPA, 24 nonfluent agrammatic PPA (nfaPPA), and 30 semantic variant PPA (svPPA)] were administered the Benson Complex Figure Copy, Benson Complex Figure Delay (Recall), and Benson Figure Recognition. Thirty individuals completed this testing 3 to 47 months post baseline. OUTCOME & RESULTS Participants with lvPPA and svPPA showed lower mean scores than those with nfaPPA on visual figure delayed recall at baseline, even though there were no differences in estimated time from disease onset or correlation with disease severity as reflected by naming performance, F(2, 90) = 5.78, p < .004. Those with nfaPPA performed significantly better than those with lvPPA, Tukey HSD p < .05, and those with svPPA, Tukey HSD p < .01. There were no differences between variants in rate of decline in visuomotor figure construction, visual figure delayed recall, and figure recognition. CONCLUSIONS These findings revealed relatively spared visuospatial memory in nfaPPA, which may aid in the differential diagnosis of PPA and contribute to designing therapy or compensatory strategies.
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Affiliation(s)
- Donna C. Tippett
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
- Department of Otolaryngology—Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287
- Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Bonnie Breining
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Emily Goldberg
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Erin Meier
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Shannon M. Sheppard
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Emily Sherry
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Melissa Stockbridge
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Adrian Suarez
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Amy E. Wright
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Argye E. Hillis
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
- Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD 21287
- Department of Cognitive Science, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218
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Apodaca MC, Wright AE, Riggins AM, Harris WP, Yeung RS, Yu L, Morishima C. Characterization of a whole blood assay for quantifying myeloid-derived suppressor cells. J Immunother Cancer 2019; 7:230. [PMID: 31462270 PMCID: PMC6714080 DOI: 10.1186/s40425-019-0674-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 01/21/2019] [Accepted: 07/10/2019] [Indexed: 02/06/2023] Open
Abstract
Background Myeloid-derived suppressor cells (MDSC) have been found to play an important role in limiting immune responses in cancer. Higher circulating MDSC levels have been associated with greater tumor burden, poorer response to immunotherapy, and poorer survival. Optimal measurement of MDSC levels could provide clinicians with a useful prognostic and/or management tool. Methods A whole blood (WB) nine color, 11 parameter flow cytometric assay was designed, utilizing fluorescently-labeled antibodies against CD45, CD3, CD19, CD20, CD56, CD16, HLA-DR, CD33, CD11b, CD14 and CD15, and BD Trucount beads for quantitation. Total MDSC were defined as CD45 + CD3−CD19−CD20−CD56−CD16−HLA-DR−CD33 + CD11b + cells, while the monocytic (M-MDSC) and polymorphonuclear subsets were defined as CD14+ or CD15+, respectively. Results A novel gating strategy was devised to eliminate granulocytes and improve consistency in gating. Several pre-analytical variables were found to significantly affect MDSC quantitation, including collection tube type and time elapsed between blood collection and testing. Total and M-MDSC levels were a mean of 63% and 73% greater, respectively, with K2EDTA compared to Na+heparin collection tubes (N = 5). In addition, time elapsed at room temperature prior to cell labeling affected MDSC quantitation; by 24 h after blood collection, total and M-MDSC levels were a mean of 26% and 57% lower compared to testing as soon as possible after collection (N = 6). Refrigeration of samples at 4 °C ameliorated time-dependent effects at both 4 and 8 h, but not 24 h after blood collection. To establish normal ranges for this assay, MDSC levels were quantified in 67 healthy subjects (30 male, 37 female) ages 20–93. No significant differences in total or M-MDSC levels were detected for ages ≤60 compared to > 60 (p = 0.5 and p = 0.8, respectively). Finally, assay results demonstrated significantly higher MDSC levels among patients with hepatocellular carcinoma (N = 55) compared to age-matched healthy controls (N = 27) for total and M-MDSC (p = 0.006 and 0.004, respectively). Conclusions MDSC are a heterogenous group of cells, and their quantitation in WB can be affected by a number of pre-analytical variables. Consideration of these factors, and measurement using a material type that has not been manipulated, such as whole blood, is likely to yield the most accurate results. Electronic supplementary material The online version of this article (10.1186/s40425-019-0674-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Minjun C Apodaca
- Department of Laboratory Medicine, University of Washington, Box 357110, 1959 NE Pacific St, Seattle, WA, 98195, USA
| | - Amy E Wright
- Department of Laboratory Medicine, University of Washington, Box 357110, 1959 NE Pacific St, Seattle, WA, 98195, USA
| | - Angela M Riggins
- Department of Laboratory Medicine, University of Washington, Box 357110, 1959 NE Pacific St, Seattle, WA, 98195, USA
| | - William P Harris
- Department of Medicine, Division of Medical Oncology, University of Washington, Seattle, WA, USA
| | - Raymond S Yeung
- Department of Surgery, University of Washington, Seattle, WA, USA
| | - Lei Yu
- Department of Medicine, Division of Gastroenterology, University of Washington, Seattle, WA, USA
| | - Chihiro Morishima
- Department of Laboratory Medicine, University of Washington, Box 357110, 1959 NE Pacific St, Seattle, WA, 98195, USA.
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Keator LM, Wright AE, Saxena S, Kim K, Demsky C, Sebastian R, Sheppard SM, Breining B, Hillis AE, Tippett DC. Distinguishing logopenic from semantic & nonfluent variant primary progressive aphasia: Patterns of linguistic and behavioral correlations. Neurocase 2019; 25:98-105. [PMID: 31164050 PMCID: PMC9677583 DOI: 10.1080/13554794.2019.1625929] [Citation(s) in RCA: 3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
While language characteristics of logopenic variant primary progressive aphasia (lvPPA) are well-defined, behavioral characteristics are less understood. We investigated correlations between language and behavioral scores across three variants of primary progressive aphasia (PPA) and found language performance and behavioral disturbances are correlated in lvPPA, but not other PPA subtypes. Results suggest that unlike other PPA variants, patients diagnosed with lvPPA do not develop negative behaviors until language deficits are severe. This is consistent with the underlying neuropathology of lvPPA, Alzheimer's Disease. Such findings are crucial to clinical prognosis, especially when considering the progressive nature of this disease.
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Affiliation(s)
- Lynsey M Keator
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Amy E Wright
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Sadhvi Saxena
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Kevin Kim
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Cornelia Demsky
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Rajani Sebastian
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Shannon M Sheppard
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Bonnie Breining
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Argye E Hillis
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA.,b Department of Cognitive Science , Krieger School of Arts and Sciences, Johns Hopkins University , Baltimore , MD , USA.,c Department of Physical Medicine and Rehabilitation , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Donna C Tippett
- a Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA.,c Department of Physical Medicine and Rehabilitation , Johns Hopkins University School of Medicine , Baltimore , MD , USA.,d Department of Otolaryngology-Head and Neck Surgery , Johns Hopkins University School of Medicine , Baltimore , MD , USA
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Odolil A, Wright AE, Keator LM, Sheppard SM, Breining B, Tippett DC, Hillis AE. Leukoaraiosis Severity Predicts Rate of Decline in Primary Progressive Aphasia. Aphasiology 2019; 34:365-375. [PMID: 32377026 PMCID: PMC7202552 DOI: 10.1080/02687038.2019.1594152] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 03/07/2019] [Indexed: 06/11/2023]
Abstract
BACKGROUND The rate of decline in language in Primary Progressive Aphasia (PPA) is highly variable and difficult to predict at baseline. The severity of diffuse white matter disease (leukoaraiosis), a marker of overall brain health, may substantially influence the rate of decline. AIMS To test the hypothesis that leukoaraiosis is associated with a steeper decline in naming in PPA. METHODS AND PROCEDURES In this longitudinal, observational study, 29 individuals with PPA (all variants) were administered the Boston Naming Test (BNT) at baseline and 1 year later. Two raters evaluated leukoaraiosis on baseline MRI, using the Cardiovascular Health Study scale. We evaluated the effects of leukoaraiosis severity, age, education, and baseline BNT on decline measured by change in BNT accuracy with multivariable linear regression. We also evaluated the effects of these variables on the dichotomized outcome of faster decline in BNT (worst 50%) versus slower decline (best 50%) using logistic regression. RESULTS Together, leukoaraiosis, age, education, and baseline BNT score predicted change in BNT score (F(3, 25) = 8.12; p=0.0006). Change in BNT score was predicted by severity of leukoaraiosis (t =-3.81; p=0.001) and education (t= -2.45; p=0.022), independently of the other variables. When we dichotomized outcome into upper 50th percentile versus lower 50th percentile (faster decline), faster decline was predicted by all variables together (chi squared = 13.91; p = 0.008). However, only leukoaraiosis independently predicted outcome (OR=2.80; 95%CI: 1.11 to 7.03). For every 1 point increase on the CHS rating scale, there was 2.8 times higher chance of showing faster decline in naming. CONCLUSION Severity of leukoaraiosis is associated with steeper decline in naming in PPA. This imaging marker can aide in prognosis and planning by caregivers and stratification of participants in clinical trials.
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Affiliation(s)
- Adam Odolil
- Department of Neurology, Johns Hopkins University School of Medicine
| | - Amy E. Wright
- Department of Neurology, Johns Hopkins University School of Medicine
| | - Lynsey M. Keator
- Department of Neurology, Johns Hopkins University School of Medicine
| | | | - Bonnie Breining
- Department of Neurology, Johns Hopkins University School of Medicine
| | - Donna C. Tippett
- Department of Neurology, Johns Hopkins University School of Medicine
- Department of Physical Medicine & Rehabilitation, Johns Hopkins University School of Medicine
- Department of Otolaryngology & Head & Neck Surgery, Johns Hopkins University School of Medicine
| | - Argye E. Hillis
- Department of Neurology, Johns Hopkins University School of Medicine
- Department of Physical Medicine & Rehabilitation, Johns Hopkins University School of Medicine
- Department of Cognitive Science, Johns Hopkins University
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Johansen MC, Doria De Vasconcellos H, Wright AE, Gottesman RF. Abstract TP201: Characterizing Left Atrial Mechanics and the Associations With Stroke Severity. Stroke 2019. [DOI: 10.1161/str.50.suppl_1.tp201] [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] [Indexed: 11/16/2022]
Abstract
Introduction:
The importance of left atrial (LA) function in cardioembolic stroke is increasingly recognized, but the associations between LA phasic function and ischemic stroke severity (admission NIH stroke scale (NIHSS)) is unknown. Two-dimension speckle tracking echocardiography (STE) allows an accurate, reproducible, and detailed assessment of the 3 components of the LA cycle.
Methods:
LA STE analysis was quantified using a post-processing wall motion tracking software according to standard definitions. Strain/strain rate curves for the 3 components of the LA cycle: 1) Reservoir (Maximum Global longitudinal strain (Smax)/strain rate (Srmax), total LA emptying fraction (tEF)) 2) Conductive (Early LA Strain rate (Sre), passive emptying fraction (pEF)) 3) Active (Late LA Strain rate (Sra), active emptying fraction (aEF)) were evaluated. The association of NIHSS (quintiles) with LA strain/strain rate was tested using ordinal logistic regression adjusted for covariates (Table 1)
Results:
Average participants (N=62) were middle aged, normotensive men. Incremental increases in Sre (worse LA conduction) was nonsignificantly associated with increased odds of higher NIHSS (OR 1.13 , 95%CI 0.67-1.88). Incremental increases in Sra (worse LA contraction) was associated with decreased odds of higher NIHSS that persisted after adjustment for demographics and LV function (OR 0.68, 95%CI 0.46-1.00). Better LA reservoir function (incremental Smax increases) was suggestive of decreased odds of worse stroke.
Conclusions:
This study suggest that odds of a more severe stroke is lower in patients with better LA reservoir function and worse LA contraction, but higher in participants with worse LA conductive function, mirroring the dynamic changes in diastolic dysfunction (impaired LA conduction, compensatory increase in contractile phase). Additional work to increase power and further characterize these associations is ongoing.
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Xu D, Nepal KK, Chen J, Harmody D, Zhu H, McCarthy PJ, Wright AE, Wang G. Nocardiopsistins A-C: New angucyclines with anti-MRSA activity isolated from a marine sponge-derived Nocardiopsis sp. HB-J378. Synth Syst Biotechnol 2018; 3:246-251. [PMID: 30417139 PMCID: PMC6223224 DOI: 10.1016/j.synbio.2018.10.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 08/30/2018] [Revised: 10/21/2018] [Accepted: 10/24/2018] [Indexed: 12/20/2022] Open
Abstract
Marine natural products have become an increasingly important source of new drug leads during recent years. In an attempt to identify novel anti-microbial natural products by bioprospecting deep-sea Actinobacteria, three new angucyclines, nocardiopsistins A-C, were isolated from Nocardiopsis sp. strain HB-J378. Notably, the supplementation of the rare earth salt Lanthanum chloride (LaCl3) during fermentation of HB-J378 significantly increased the yield of these angucyclines. The structures of nocardiopsistins A-C were identified by 1D and 2D NMR and HR-MS data. Nocardiopsistins A-C have activity against MRSA (methicillin-resistant Staphylococcus aureus) with MICs of 3.12–12.5 μg/mL; the potency of nocardiopsistin B is similar to that of the positive control, chloramphenicol. Bioinformatic analysis of the draft genome of HB-J378 identified a set of three core genes in a biosynthetic gene cluster that encode a typical aromatic or type II polyketide synthase (PKS) system, including ketoacyl:ACP synthase α-subunit (KSα), β-subunit (KSβ) and acyl carrier protein (ACP). The production of nocardiopsistins A-C was abolished when the three genes were knocked out, indicating their indispensable role in the production of nocardiopsistins.
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Affiliation(s)
- Dongbo Xu
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL, 34946, United States
| | - Keshav K Nepal
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL, 34946, United States
| | - Jing Chen
- Department of Molecular and Cellular Biochemistry, University of Kentucky, 741 South Limestone, Lexington, KY, 40536, United States
| | - Dedra Harmody
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL, 34946, United States
| | - Haining Zhu
- Department of Molecular and Cellular Biochemistry, University of Kentucky, 741 South Limestone, Lexington, KY, 40536, United States
| | - Peter J McCarthy
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL, 34946, United States
| | - Amy E Wright
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL, 34946, United States
| | - Guojun Wang
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL, 34946, United States
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Cichewicz RH, Cragg GM, Linington RG, Wright AE. Special Issue in Honor of Professor Phil Crews. J Nat Prod 2017; 80:579-581. [PMID: 28335607 DOI: 10.1021/acs.jnatprod.7b00161] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
| | - Gordon M Cragg
- NIH Special Volunteer , Bethesda, Maryland, United States
| | | | - Amy E Wright
- Harbor Branch Oceanographic Institute, Florida Atlantic University , Fort Pierce, Florida, United States
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Wright AE, Roberts JC, Guzmán EA, Pitts TP, Pomponi SA, Reed JK. Analogues of the Potent Antitumor Compound Leiodermatolide from a Deep-Water Sponge of the Genus Leiodermatium. J Nat Prod 2017; 80:735-739. [PMID: 28135095 PMCID: PMC8327308 DOI: 10.1021/acs.jnatprod.6b01140] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Two new analogues of the potent antitumor compound leiodermatolide, which we call leiodermatolides B and C, have been isolated from specimens of a deep-water sponge of the genus Leiodermatium collected off Florida. The compounds were purified using standard chromatographic methods, and the structures defined through interpretation of the HRMS and 1D and 2D NMR data. Leiodermatolide B (2) lacks the C-21 hydroxy group found in leiodermatolide and has equal potency as the parent compound, providing a simpler analogue for possible clinical development. It inhibits the proliferation of the AsPC-1 human pancreatic adenocarcinoma cell line with an IC50 of 43 nM. Leiodermatolide C (3) has a modified macrolide ring and is over 85-fold less potent with an IC50 of 3.7 μM against the same cell line. These compounds add to the knowledge of the pharmacophore of this class of potent antitumor agents.
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Affiliation(s)
- Amy E. Wright
- To whom correspondence should be addressed. ; Phone: 772-242-2459
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22
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Guzmán EA, Xu Q, Pitts TP, Mitsuhashi KO, Baker C, Linley PA, Oestreicher J, Tendyke K, Winder PL, Suh EM, Wright AE. Leiodermatolide, a novel marine natural product, has potent cytotoxic and antimitotic activity against cancer cells, appears to affect microtubule dynamics, and exhibits antitumor activity. Int J Cancer 2016; 139:2116-26. [PMID: 27376928 DOI: 10.1002/ijc.30253] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [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: 01/22/2016] [Revised: 05/12/2016] [Accepted: 06/06/2016] [Indexed: 01/05/2023]
Abstract
Pancreatic cancer, the fourth leading cause of cancer death in the United States, has a negative prognosis because metastasis occurs before symptoms manifest. Leiodermatolide, a polyketide macrolide with antimitotic activity isolated from a deep water sponge of the genus Leiodermatium, exhibits potent and selective cytotoxicity toward the pancreatic cancer cell lines AsPC-1, PANC-1, BxPC-3, and MIA PaCa-2, and potent cytotoxicity against skin, breast and colon cancer cell lines. Induction of apoptosis by leiodermatolide was confirmed in the AsPC-1, BxPC-3 and MIA PaCa-2 cells. Leiodermatolide induces cell cycle arrest but has no effects on in vitro polymerization or depolymerization of tubulin alone, while it enhances polymerization of tubulin containing microtubule associated proteins (MAPs). Observations through confocal microscopy show that leiodermatolide, at low concentrations, causes minimal effects on polymerization or depolymerization of the microtubule network in interphase cells, but disruption of spindle formation in mitotic cells. At higher concentrations, depolymerization of the microtubule network is observed. Visualization of the growing microtubule in HeLa cells expressing GFP-tagged plus end binding protein EB-1 showed that leiodermatolide stopped the polymerization of tubulin. These results suggest that leiodermatolide may affect tubulin dynamics without directly interacting with tubulin and hint at a unique mechanism of action. In a mouse model of metastatic pancreatic cancer, leiodermatolide exhibited significant tumor reduction when compared to gemcitabine and controls. The antitumor activities of leiodermatolide, as well as the proven utility of antimitotic compounds against cancer, make leiodermatolide an interesting compound with potential chemotherapeutic effects that may merit further research.
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Affiliation(s)
- Esther A Guzmán
- Marine Biomedical and Biotechnology Research, Harbor Branch Oceanographic Institute at Florida Atlantic University Ft. Pierce, FL, 34946
| | - Qunli Xu
- Eisai Research Institute of Boston Inc, Andover, MA, 01810-2441
| | - Tara P Pitts
- Marine Biomedical and Biotechnology Research, Harbor Branch Oceanographic Institute at Florida Atlantic University Ft. Pierce, FL, 34946
| | | | - Cheryl Baker
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Orlando, FL, 32827
| | - Patricia A Linley
- Marine Biomedical and Biotechnology Research, Harbor Branch Oceanographic Institute at Florida Atlantic University Ft. Pierce, FL, 34946
| | | | - Karen Tendyke
- Eisai Research Institute of Boston Inc, Andover, MA, 01810-2441
| | - Priscilla L Winder
- Marine Biomedical and Biotechnology Research, Harbor Branch Oceanographic Institute at Florida Atlantic University Ft. Pierce, FL, 34946
| | - Edward M Suh
- Eisai Research Institute of Boston Inc, Andover, MA, 01810-2441
| | - Amy E Wright
- Marine Biomedical and Biotechnology Research, Harbor Branch Oceanographic Institute at Florida Atlantic University Ft. Pierce, FL, 34946
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Wright AE, Davis C, Gomez Y, Posner J, Rorden C, Hillis AE, Tippett DC. Acute Ischemic Lesions Associated with Impairments in Expression and Recognition of Affective Prosody. ACTA ACUST UNITED AC 2016. [PMID: 28626799 DOI: 10.1044/persp1.sig2.82] [Citation(s) in RCA: 10] [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] [Indexed: 12/13/2022]
Abstract
PURPOSE We aimed to: (a) review existing data on the neural basis of affective prosody;(b) test the hypothesis that there are double dissociations in impairments of expression and recognition of affective prosody; and (c) identify areas of infarct associated with impaired expression and/or recognition of affective prosody after acute right hemisphere (RH) ischemic stroke. METHODS Participants were tested on recognition of emotional prosody in content-neutral sentences. Expression was evaluated by measuring variability in fundamental frequency. Voxel-based symptom mapping was used to identify areas associated with severity of expressive deficits. RESULTS We found that 9/23 patients had expressive prosody impairments; 5/9 of these patients also had impaired recognition of affective prosody; 2/9 had selective deficits in expressive prosody; recognition was not tested in 2/9. Another 6/23 patients had selective impairment in recognition of affective prosody. Severity of expressive deficits was associated with lesions in right temporal pole; patients with temporal pole lesions had deficits in expression and recognition. CONCLUSIONS Expression and recognition of prosody can be selectively impaired. Damage to right anterior temporal pole is associated with impairment of both, indicating a role of this structure in a mechanism shared by expression and production of affective prosody.
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Affiliation(s)
- Amy E Wright
- Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD
| | - Cameron Davis
- Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD
| | - Yessenia Gomez
- Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD
| | - Joseph Posner
- Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD
| | - Christopher Rorden
- Center for Aphasia Research and Rehabilitation, University of South Carolina, Columbia, SC
| | - Argye E Hillis
- Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD. Department of Cognitive Science, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD
| | - Donna C Tippett
- Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD. Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
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Little JP, Jung ME, Wright AE, Wright W, Manders RJF. Effects of high-intensity interval exercise versus continuous moderate-intensity exercise on postprandial glycemic control assessed by continuous glucose monitoring in obese adults. Appl Physiol Nutr Metab 2014; 39:835-841. [PMID: 24773254 DOI: 10.1139/apnm-2013-0512] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [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] [Indexed: 11/18/2023]
Abstract
The purpose of this study was to examine the impact of acute high-intensity interval training (HIIT) compared with continuous moderate-intensity (CMI) exercise on postprandial hyperglycemia in overweight or obese adults. Ten inactive, overweight or obese adults (41 ± 11 yrs, BMI = 36 ± 7 kg/m(2)) performed an acute bout of HIIT (10 × 1 min at approximately 90% peak heart rate (HRpeak) with 1-min recovery periods) or matched work CMI (30 min at approximately 65% HRpeak) in a randomized, counterbalanced fashion. Exercise was performed 2 h after breakfast, and glucose control was assessed by continuous glucose monitoring under standardized dietary conditions over 24 h. Postprandial glucose (PPG) responses to lunch, dinner, and the following day's breakfast were analyzed and compared with a no-exercise control day. Exercise did not affect the PPG responses to lunch, but performing both HIIT and CMI in the morning significantly reduced the PPG incremental area under the curve (AUC) following dinner when compared with control (HIIT = 110 ± 35, CMI = 125 ± 34, control = 162 ± 46 mmol/L × 2 h, p < 0.05). The PPG AUC (HIIT = 125 ± 53, CMI = 186 ± 55, control = 194 ± 96 mmol/L × 2 h) and the PPG spike (HIIT = Δ2.1 ± 0.9, CMI = Δ3.0 ± 0.9, control = Δ3.0 ± 1.5 mmol/l) following breakfast on the following day were significantly lower following HIIT compared with both CMI and control (p < 0.05). Absolute AUC and absolute glucose spikes were not different between HIIT, CMI, or control for any meal (p > 0.05 for all). We conclude that a single session of HIIT has greater and more lasting effects on reducing incremental PPG when compared with CMI.
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Affiliation(s)
- Jonathan P Little
- a School of Health and Exercise Sciences, Faculty of Health and Social Development, University of British Columbia Okanagan, Kelowna, BC V1V 1V7, Canada
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25
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Hassig CA, Zeng FY, Kung P, Kiankarimi M, Kim S, Diaz PW, Zhai D, Welsh K, Morshedian S, Su Y, O'Keefe B, Newman DJ, Rusman Y, Kaur H, Salomon CE, Brown SG, Baire B, Michel AR, Hoye TR, Francis S, Georg GI, Walters MA, Divlianska DB, Roth GP, Wright AE, Reed JC. Ultra-High-Throughput Screening of Natural Product Extracts to Identify Proapoptotic Inhibitors of Bcl-2 Family Proteins. ACTA ACUST UNITED AC 2014; 19:1201-11. [PMID: 24870016 DOI: 10.1177/1087057114536227] [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: 03/10/2014] [Accepted: 04/26/2014] [Indexed: 12/30/2022]
Abstract
Antiapoptotic Bcl-2 family proteins are validated cancer targets composed of six related proteins. From a drug discovery perspective, these are challenging targets that exert their cellular functions through protein-protein interactions (PPIs). Although several isoform-selective inhibitors have been developed using structure-based design or high-throughput screening (HTS) of synthetic chemical libraries, no large-scale screen of natural product collections has been reported. A competitive displacement fluorescence polarization (FP) screen of nearly 150,000 natural product extracts was conducted against all six antiapoptotic Bcl-2 family proteins using fluorochrome-conjugated peptide ligands that mimic functionally relevant PPIs. The screens were conducted in 1536-well format and displayed satisfactory overall HTS statistics, with Z'-factor values ranging from 0.72 to 0.83 and a hit confirmation rate between 16% and 64%. Confirmed active extracts were orthogonally tested in a luminescent assay for caspase-3/7 activation in tumor cells. Active extracts were resupplied, and effort toward the isolation of pure active components was initiated through iterative bioassay-guided fractionation. Several previously described altertoxins were isolated from a microbial source, and the pure compounds demonstrate activity in both Bcl-2 FP and caspase cellular assays. The studies demonstrate the feasibility of ultra-high-throughput screening using natural product sources and highlight some of the challenges associated with this approach.
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Affiliation(s)
| | - Fu-Yue Zeng
- Sanford Burnham Medical Research Institute, La Jolla, CA, USA
| | - Paul Kung
- Sanford Burnham Medical Research Institute, La Jolla, CA, USA
| | | | - Sylvia Kim
- Sanford Burnham Medical Research Institute, La Jolla, CA, USA
| | - Paul W Diaz
- Sanford Burnham Medical Research Institute, La Jolla, CA, USA
| | - Dayong Zhai
- Sanford Burnham Medical Research Institute, La Jolla, CA, USA
| | - Kate Welsh
- Sanford Burnham Medical Research Institute, La Jolla, CA, USA
| | | | - Ying Su
- Sanford Burnham Medical Research Institute, La Jolla, CA, USA
| | | | | | - Yudi Rusman
- Center for Drug Design, University of Minnesota, Minneapolis, MN, USA
| | - Harneet Kaur
- Center for Drug Design, University of Minnesota, Minneapolis, MN, USA
| | | | - Susan G Brown
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Beeraiah Baire
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Andrew R Michel
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Thomas R Hoye
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Subhashree Francis
- Institute for Therapeutics Discovery and Development, Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Gunda I Georg
- Institute for Therapeutics Discovery and Development, Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Michael A Walters
- Institute for Therapeutics Discovery and Development, Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, USA
| | | | - Gregory P Roth
- Sanford-Burnham Medical Research Institute at Lake Nona, Orlando, FL, USA
| | - Amy E Wright
- Harbor Branch Oceanographic Institute at Florida Atlantic University, Fort Pierce, FL, USA
| | - John C Reed
- Sanford Burnham Medical Research Institute, La Jolla, CA, USA Roche Pharmaceuticals, Basel, Switzerland
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Russell F, Harmody D, McCarthy PJ, Pomponi SA, Wright AE. Indolo[3,2-a]carbazoles from a deep-water sponge of the genus Asteropus. J Nat Prod 2013; 76:1989-1992. [PMID: 24063539 PMCID: PMC3812703 DOI: 10.1021/np400501u] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Indexed: 06/01/2023]
Abstract
Two new indolo[3,2-a]carbazoles (1, 2) were isolated from a deep-water collection of a sponge of the genus Asteropus. The structures of 1 and 2 were determined through the analysis of spectroscopic data including mass spectrometry and 2D-NMR. Compound 1 showed minimum inhibitory concentrations of 25 μg/mL against the fungal pathogen Candida albicans and 50 μg/mL against methicillin-resistant Staphylococcus aureus (MRSA). Compounds 1 and 2 showed no cytotoxicity against the PANC1 human pancreatic carcinoma and NCI/ADR-RES ovarian adenocarcinoma cell lines at our standard test concentration of 5 μg/mL.
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Kallifatidis G, Hoepfner D, Jaeg T, Guzmán EA, Wright AE. The marine natural product manzamine A targets vacuolar ATPases and inhibits autophagy in pancreatic cancer cells. Mar Drugs 2013; 11:3500-16. [PMID: 24048269 PMCID: PMC3806460 DOI: 10.3390/md11093500] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 08/31/2013] [Accepted: 09/03/2013] [Indexed: 01/02/2023] Open
Abstract
Manzamine A, a member of the manzamine alkaloids, was originally isolated from marine sponges of the genus Haliclona. It was recently shown to have activity against pancreatic cancer cells, but the precise mechanism of action remained unclear. To further our understanding of the mechanism of action of manzamine A, chemogenomic profiling in the yeast S. cerevisiae was performed, suggesting that manzamine A is an uncoupler of vacuolar ATPases. Fluorescence microscopy confirmed this effect on yeast vacuoles, where manzamine A produced a phenotype very similar to that of the established v-ATPase inhibitor bafilomycin A1. In pancreatic cancer cells, 10 µM manzamine A affected vacuolar ATPase activity and significantly increased the level of autophagosome marker LC3-II and p62/SQSTM1 as observed by western blot analysis. Treatment with manzamine A in combination with bafilomycin A1 (inhibitor of autophagosome-lysosome fusion) did not change the levels of LC3-II when compared to cells treated with bafilomycin A1 alone, suggesting that manzamine A is a potential inhibitor of autophagy by preventing autophagosome turnover. As autophagy is essential for pancreatic tumor growth, blocking this pathway with manzamine A suggests a promising strategy for the treatment of pancreatic cancer.
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Affiliation(s)
- Georgios Kallifatidis
- Marine Biomedical and Biotechnology Research Program, Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL 34946, USA; E-Mails: (G.K.); (A.E.W.)
| | - Dominic Hoepfner
- Novartis Institutes for BioMedical Research, Developmental & Molecular Pathways, Novartis Pharma AG, WSJ-355.1.051.21, Fabrikstrasse 22, Basel CH-4056, Switzerland; E-Mails: (D.H.); (T.J.)
| | - Tiphaine Jaeg
- Novartis Institutes for BioMedical Research, Developmental & Molecular Pathways, Novartis Pharma AG, WSJ-355.1.051.21, Fabrikstrasse 22, Basel CH-4056, Switzerland; E-Mails: (D.H.); (T.J.)
| | - Esther A. Guzmán
- Marine Biomedical and Biotechnology Research Program, Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL 34946, USA; E-Mails: (G.K.); (A.E.W.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-772-242-2452; Fax: +1-772-242-2332
| | - Amy E. Wright
- Marine Biomedical and Biotechnology Research Program, Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL 34946, USA; E-Mails: (G.K.); (A.E.W.)
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Abstract
Males and females share the vast majority of their genomes and yet are often subject to different, even conflicting, selection. Genomic and transcriptomic developments have made it possible to assess sex-specific selection at the molecular level, and it is clear that sex-specific selection shapes the evolutionary properties of several genomic characteristics, including transcription, post-transcriptional regulation, imprinting, genome structure and gene sequence. Sex-specific selection is strongly influenced by mating system, which also causes neutral evolutionary changes that affect different regions of the genome in different ways. Here, we synthesize theoretical and molecular work in order to provide a cohesive view of the role of sex-specific selection and mating system in genome evolution. We also highlight the need for a combined approach, incorporating both genomic data and experimental phenotypic studies, in order to understand precisely how sex-specific selection drives evolutionary change across the genome.
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Affiliation(s)
- A E Wright
- Department of Zoology, University of Oxford, Edward Grey Institute, Oxford, UK.
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Abstract
Abstract
Recent studies suggest that the energetic demands of long-distance migration might lower the pool of resources available for costly immune defenses. Moreover, migration could amplify the costs of parasitism if animals suffering from parasite-induced damage or depleted energy reserves are less able to migrate long distances. We investigated relationships between long-distance migration, infection, and immunity in wild fall-migrating monarch butterflies Danaus plexippus. Monarchs migrate annually from eastern North America to central Mexico, accumulating lipids essential for migration and winter survival as they travel southward. Monarchs are commonly infected by the debilitating protozoan parasite Ophryocystis elektroscirrha (OE). We collected data on lipid reserves, parasite loads, and two immune measures (hemocyte concentration and phenoloxidase activity) from wild monarchs migrating through north GA (USA) to ask whether (1) parasite infection negatively affects lipid reserves, and (2) greater investment in lipid reserves is associated with lower immune measures. Results showed that monarchs sampled later in the fall migration had lower but not significantly different immune measures and significantly higher lipid reserves than those sampled earlier. Lipid measures correlated negatively but only nearly significantly with one measure of immune defense (phenoloxidase activity) in both healthy and infected monarchs, but did not depend on monarch infection status or parasite load. These results provide weak support for a trade-off between energy reserves and immune defense in migrants, and suggest that previously-demonstrated costs of OE infection for monarch migration are not caused by depleted lipid reserves.
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Affiliation(s)
| | - Amy E. Wright
- Odum School of Ecology, University of Georgia, Athens, GA 30602, USA
| | - Sonia Altizer
- Odum School of Ecology, University of Georgia, Athens, GA 30602, USA
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30
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Guzman EA, Pitts T, Wright AE. Abstract A50: Inhibition of IL-8 production by pancreatic cancer cells with marine natural products. Cancer Res 2013. [DOI: 10.1158/1538-7445.tumimm2012-a50] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Pancreatic cancer presents one of the most negative prognoses of all cancers, as it has usually metastasized by the time a patient is diagnosed. Therefore, almost as many deaths as new cases are expected each year. Although combination therapy shows some promise, the need for new drugs to treat the disease is pressing. Harbor Branch Oceanographic Institute (HBOI) has developed a unique library of marine samples and its research program seeks to tap into the biological diversity of the oceans to find potential anti-cancer drugs. Inflammation has been connected to pancreatic cancer development and progression. A recent study has shown that IL-8 mediates the angiogenesis of tumors arising from Ras-mutations. Ras is a proto-oncogene that is mutationally activated in 90% of pancreatic adenocarcinomas. Overexpression of IL-8 in pancreatic tumors is thought to promote tumor angiogenesis and to activate survival signaling pathways. Given our interest in finding new therapies for pancreatic cancer, we set up a 96-well cell-based assay to screen our library of marine natural products for those with the ability to inhibit IL-8 production by pancreatic cancer cells. A thousand fractions were screened resulting in the identification of marine natural products with the ability to inhibit IL-8 secretion by the BxPC-3 pancreatic cancer cell line. Studies are currently underway to determine if this inhibition leads to an inhibition in angiogenesis or affects cell proliferation.
Citation Format: Esther A. Guzman, Tara Pitts, Amy E. Wright. Inhibition of IL-8 production by pancreatic cancer cells with marine natural products. [abstract]. In: Proceedings of the AACR Special Conference on Tumor Immunology: Multidisciplinary Science Driving Basic and Clinical Advances; Dec 2-5, 2012; Miami, FL. Philadelphia (PA): AACR; Cancer Res 2013;73(1 Suppl):Abstract nr A50.
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Affiliation(s)
- Esther A. Guzman
- Harbor Branch Oceanographic Institute at Florida Atlantic University, Fort Pierce, FL
| | - Tara Pitts
- Harbor Branch Oceanographic Institute at Florida Atlantic University, Fort Pierce, FL
| | - Amy E. Wright
- Harbor Branch Oceanographic Institute at Florida Atlantic University, Fort Pierce, FL
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Winder PL, Pomponi SA, Wright AE. Natural products from the Lithistida: a review of the literature since 2000. Mar Drugs 2011; 9:2643-2682. [PMID: 22363244 PMCID: PMC3280575 DOI: 10.3390/md9122643] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 11/09/2011] [Accepted: 12/06/2011] [Indexed: 12/20/2022] Open
Abstract
Lithistid sponges are known to produce a diverse array of compounds ranging from polyketides, cyclic and linear peptides, alkaloids, pigments, lipids, and sterols. A majority of these structurally complex compounds have very potent and interesting biological activities. It has been a decade since a thorough review has been published that summarizes the literature on the natural products reported from this amazing sponge order. This review provides an update on the current taxonomic classification of the Lithistida, describes structures and biological activities of 131 new natural products, and discusses highlights from the total syntheses of 16 compounds from marine sponges of the Order Lithistida providing a compilation of the literature since the last review published in 2002.
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Affiliation(s)
- Priscilla L Winder
- Harbor Branch Oceanographic Institution at Florida Atlantic University, Center for Marine Biomedical and Biotechnology Research, 5600 US 1 North, Fort Pierce, FL 34946, USA
| | - Shirley A Pomponi
- Harbor Branch Oceanographic Institution at Florida Atlantic University, Center for Marine Biomedical and Biotechnology Research, 5600 US 1 North, Fort Pierce, FL 34946, USA
| | - Amy E Wright
- Harbor Branch Oceanographic Institution at Florida Atlantic University, Center for Marine Biomedical and Biotechnology Research, 5600 US 1 North, Fort Pierce, FL 34946, USA
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Wright AE. A Note on Certain Improvements in the Method of Determining the Condition of Blood Coagulability for Clinical and Experimental Uses. Br Med J 2011; 1:237-8. [PMID: 20754647 DOI: 10.1136/bmj.1.1727.237-a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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34
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Wright AE. A Lecture ON THERAPEUTIC INOCULATIONS OF BACTERIAL VACCINES. AND THEIR PRACTICAL EXPLOITATION IN THE TREATMENT OF DISEASE: Delivered at the Medical Graduates' College and Polyclinic. Br Med J 2011; 1:1069-74. [PMID: 20760879 DOI: 10.1136/bmj.1.2210.1069] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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35
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Wright AE. A Lecture ON WOUND INFECTIONS AND THEIR TREATMENT: Delivered (with Demonstrations) at the Opening of an Exhibition of Surgical Appliances for the Treatment of the Wounded held at the Royal Society of Medicine from October 8th to 14th. Br Med J 2011; 2:629-35. [PMID: 20767868 DOI: 10.1136/bmj.2.2861.629] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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36
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Wright AE, Leishman WB. Remarks on the Results which have been Obtained by the Antityphoid Inoculations and on the Methods which have been Employed in the Preparation of the Vaccine. Br Med J 2011; 1:122-9. [PMID: 20758818 DOI: 10.1136/bmj.1.2038.122] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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37
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Wright AE. On a Method of Determining the Condition of Blood Coagulability for Clinical and Experimental Purposes, and on the Effect of the Administration of Calcium Salts in Haemophilia and Actual or Threatened Haemorrhage: [Preliminary Communication]. Br Med J 2011; 2:223-5. [PMID: 20754381 DOI: 10.1136/bmj.2.1700.223] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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38
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Wright AE. On Wooldridge's Method of Producing Immunity against Anthrax by the Injection of Solutions of Tissue Fibrinogen. Br Med J 2011; 2:641-4. [PMID: 20753404 DOI: 10.1136/bmj.2.1603.641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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39
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Wright AE, Semple D. On the Employment of Dead Bacteria in the Serum Diagnosis of Typhoid and Malta Fever, and on an Easy Method of Extemporising a Blowpipe Flame for Making Capillary Sero-Sedimentation Tubes. Br Med J 2011; 1:1214-5. [PMID: 20756994 DOI: 10.1136/bmj.1.1898.1214] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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40
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Wright AE. An Address ON WOUND INFECTIONS; AND ON SOME NEW METHODS FOR THE STUDY OF THE VARIOUS FACTORS WHICH COME INTO CONSIDERATION IN THEIR TREATMENT: Delivered before the Royal Society of Medicine on March 30th. Br Med J 2011; 1:625-8. [PMID: 20767580 DOI: 10.1136/bmj.1.2832.625] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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41
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42
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43
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Wright AE. Upon a New Styptic, and upon the Possibility of Increasing the Coagulability of the Blood in the Vessels in Cases of Haemophilia and Aneurysm and Internal Haemorrhage. Br Med J 2011; 2:1306-8. [PMID: 20753464 DOI: 10.1136/bmj.2.1616.1306] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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44
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Wright AE. Remarks on Methods of Increasing and Diminishing the Coagulability of the Blood, with Especial Reference to their Therapeutic Employment. Br Med J 2011; 2:57-61. [PMID: 20754949 DOI: 10.1136/bmj.2.1750.57] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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45
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Wright AE. An Address ON WOUND INFECTIONS; AND ON SOME NEW METHODS FOR THE STUDY OF THE VARIOUS FACTORS WHICH COME INTO CONSIDERATION IN THEIR TREATMENT: Delivered before the Royal Society of Medicine on March 30th. Br Med J 2011; 1:665-8. [PMID: 20767590 DOI: 10.1136/bmj.1.2833.665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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46
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Wright AE. MEMORANDUM ON THE TREATMENT OF INFECTED WOUNDS BY PHYSIOLOGICAL METHODS: (Drainage of Infected Tissues by Hypertonic Salt Solution, and Utilization of the Antibacterial Powers of the Blood Fluids and White Blood Corpuscles.). Br Med J 2011; 1:793-7. [PMID: 20768161 DOI: 10.1136/bmj.1.2892.793] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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47
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Paterson I, Dalby SM, Roberts JC, Naylor GJ, Guzmán EA, Isbrucker R, Pitts TP, Linley P, Divlianska D, Reed JK, Wright AE. Leiodermatolide, a potent antimitotic macrolide from the marine sponge Leiodermatium sp. Angew Chem Int Ed Engl 2011; 50:3219-23. [PMID: 21374771 PMCID: PMC3875319 DOI: 10.1002/anie.201007719] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [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: 12/08/2010] [Revised: 01/18/2011] [Indexed: 11/11/2022]
Abstract
Leiodermatolide is a structurally unique macrolide, isolated from the deep-water marine sponge Leiodermatium sp ., which exhibits potent antiproliferative activity against a range of human cancer cell lines (IC50 <10 nM) and dramatic effects on spindle formation in mitotic cells. Its unprecedented polyketide skeleton and stereochemistry were established using a combination of experimental and computational (DP4) NMR methods, and molecular modelling.
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Affiliation(s)
- Ian Paterson
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, UK, Fax: (+44)1223-336362, Homepage: http://www-paterson.ch.cam.ac.uk/
| | - Stephen M. Dalby
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, UK, Fax: (+44)1223-336362, Homepage: http://www-paterson.ch.cam.ac.uk/
| | - Jill C. Roberts
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Guy J. Naylor
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, UK, Fax: (+44)1223-336362, Homepage: http://www-paterson.ch.cam.ac.uk/
| | - Esther A. Guzmán
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Richard Isbrucker
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Tara P. Pitts
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Pat Linley
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Daniela Divlianska
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - John K. Reed
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
| | - Amy E. Wright
- Harbor Branch Oceanographic Institute at Florida Atlantic University, 5600 US 1 North, Fort Pierce, Florida, USA FL 34946, Fax: (+00)1-772-242-2332
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48
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Paterson I, Dalby SM, Roberts JC, Naylor GJ, Guzmán EA, Isbrucker R, Pitts TP, Linley P, Divlianska D, Reed JK, Wright AE. Leiodermatolide, a Potent Antimitotic Macrolide from the Marine Sponge Leiodermatium sp. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007719] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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49
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Wright AE. The Lithistida: important sources of compounds useful in biomedical research. Curr Opin Biotechnol 2011; 21:801-7. [PMID: 20971629 DOI: 10.1016/j.copbio.2010.09.012] [Citation(s) in RCA: 8] [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] [Received: 08/27/2010] [Revised: 09/06/2010] [Accepted: 09/17/2010] [Indexed: 10/18/2022]
Abstract
Lithistid sponges have been an important source of structurally complex natural products with potent biological activities. Examples of compounds marketed as biological markers along with recent advances in defining the modes of action and biomedical potential of lithistid-derived compounds are presented.
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Affiliation(s)
- Amy E Wright
- Harbor Branch Oceanographic Institute at Florida Atlantic University, Center for Marine Biomedical and Biotechnology Research, 5600 US 1 North, Fort Pierce, FL 34946, USA.
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50
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Paterson I, Naylor GJ, Gardner NM, Guzmán E, Wright AE. Total synthesis and biological evaluation of a series of macrocyclic hybrids and analogues of the antimitotic natural products dictyostatin, discodermolide, and taxol. Chem Asian J 2011; 6:459-73. [PMID: 21254424 PMCID: PMC3050503 DOI: 10.1002/asia.201000541] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [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: 08/05/2010] [Indexed: 11/09/2022]
Abstract
The design, synthesis, and biological evaluation of a series of hybrids and analogues of the microtubule-stabilizing anticancer agents dictyostatin, discodermolide, and taxol is described. A 22-membered macrolide scaffold was prepared by adapting earlier synthetic routes directed towards dictyostatin and discodermolide, taking advantage of the distinctive structural and stereochemical similarities between these two polyketide-derived marine natural products. Initial endeavors towards accessing novel discodermolide/dictyostatin hybrids led to the adoption of a late-stage diversification strategy and the construction of a small library of methyl-ether derivatives, along with the first triple hybrids bearing the side-chain of taxol or taxotere attached through an ester linkage. Biological assays of the anti-proliferative activity of these compounds in a series of human cancer cell lines, including the taxol-resistant NCI/ADR-Res cell line, allowed the proposal of various structure-activity relationships. This led to the identification of a potent macrocyclic discodermolide/dictyostatin hybrid 12 and its C9 methoxy derivative 38, accessible by an efficient total synthesis and with a similar biological profile to dictyostatin.
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Affiliation(s)
- Ian Paterson
- University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW UK.
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