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Daniel G, Hilan G, Ploeg L, Sabatino D. Self-assembly of amphiphilic helical-coiled peptide nanofibers and inhibition of fibril formation with curcumin. Bioorg Med Chem Lett 2024; 102:129682. [PMID: 38432287 DOI: 10.1016/j.bmcl.2024.129682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/06/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Abstract
Amphiphilic peptide sequences are conducive to secondary structures that self-assemble into higher-ordered peptide nanostructures. A select set of amphiphilic polycationic peptides displayed stable helical-coiled structures that self-assembled into peptide nanofibers. The progression of peptide fibril formation revealed short protofibrils that extended into thin filaments and into an entangled network of nanofibers over an extended (5 days) incubation period. Ligand binding with 8-anilinonaphthalene-1-sulfonic acid (ANS) and Congo Red (CR) confirmed the amphiphilic helical-coiled peptide structure assembly into nanofibers, whereas curcumin treatment led to inhibition of fibril formation. Considering the vast repertoire of fibrous biomaterials and peptide or protein (mis)folding contingent on fibril formation, this work relates the molecular interplay in between sequence composition, structural folding and the ligand binding events impacting peptide self-assembly into nanofibers.
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Affiliation(s)
- Grace Daniel
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada; Institute of Biochemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
| | - George Hilan
- Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
| | - Lisa Ploeg
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
| | - David Sabatino
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada; Institute of Biochemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada.
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Sabatino D, Henneman A, Ahmad S, Jou E, Goldberg B. Evaluation of the efficacy of ursodiol for prevention of hepatotoxicity in patients receiving gemtuzumab ozogamicin and inotuzumab ozogamicin. J Oncol Pharm Pract 2022:10781552221084000. [PMID: 35293248 DOI: 10.1177/10781552221084000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Gemtuzumab ozogamicin (GO) and inotuzumab ozogamicin (InO) are indicated for newly diagnosed or relapsed/refractory CD33-positive acute myeloid leukemia and relapsed/refractory B-cell precursor acute lymphoblastic leukemia respectively. Patients undergoing therapy with these agents are at increased risk for hepatotoxicity. Forty-nine patients received either GO or InO with concomitant ursodiol (n=14) or no ursodiol (n=35) for hepatotoxicity prophylaxis. Hepatotoxicity occurred in 2 (14%) patients in the ursodiol group compared to 15 (43%) patients in the no ursodiol group (p=0.10). Median days (17 versus 11; p=0.66) and doses (4 versus 2; p=0.28) to development of hepatotoxicity were higher in the ursodiol versus no ursodiol group. After adjusting for concomitant hepatotoxic medications and prior chemotherapy, ursodiol did not significantly reduce the incidence of hepatotoxicity. Ursodiol prophylaxis was associated with a similar incidence of hepatotoxicity compared to no ursodiol, but may delay the time to occurrence.
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Affiliation(s)
- David Sabatino
- Department of Pharmacy, 25065NewYork-Presbyterian Hospital, New York, New York, United States
| | - Amrita Henneman
- Department of Pharmacy, 24945North Shore University Hospital, Manhasset, New York, United States
| | - Samrah Ahmad
- Department of Pharmacy, 24945North Shore University Hospital, Manhasset, New York, United States
| | - Erin Jou
- Department of Hematology/Oncology, 232890Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York, United States
| | - Bradley Goldberg
- Department of Hematology/Oncology, 232890Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York, United States
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Hanna N, Leung K, Hernandez L, Sleiman J, Ruiz DM, Perez E, Sarkar A, Nimmagadda M, Heller E, Camargo AL, Zandiyeh M, Madison J, Alvarez A, Shriver A, Sabatino D, Schtupak N, Verghese D, Sheffield C, Brozzi N, Hakemi E, Noguera E, Cudemus G, Fermin L, Minear S, Velez M, Navas V, Cubeddu R, Navia J, Hernandez-Montfort J. Bridge to Remission in Biventricular Cardiogenic Shock Associated with Endocrine Cardiomyopathy. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Shah SS, Cultrara CN, Ramos JA, Samuni U, Zilberberg J, Sabatino D. Bifunctional Au-templated RNA nanoparticles enable direct cell uptake detection and GRP75 knockdown in prostate cancer. J Mater Chem B 2021; 8:2169-2176. [PMID: 32096520 DOI: 10.1039/c9tb02438g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Nucleic acids templated on gold (Au) surfaces have led to a wide range of functional materials ranging from microarrays, sensors and probes in addition to drug delivery and treatment. In this application, we describe a simple and novel method for templating amino-functionalized RNA onto Au surfaces and their self-assembly into small, discrete nanoparticles. In our method, sample hybridization with a complementary RNA strand with and without a fatty acid (palmitamide) appendage produced functionalized double-stranded RNA on the Au surface. The resulting Au-functionalized RNA particles were found to be stable under reducing conditions according to UV-Vis spectroscopy. Sample characterization by DLS and TEM confirmed self-assembly into primarily small (∼10-40 nm) spherical shaped nanoparticles expected to be amenable to cell biology. However, fluorescence emission (λexc: 350 nm, λem: 650 nm) revealed radiative properties which limited cell uptake detection. Introduction of FITC within the Au-functionalized RNA particles produced a bifunctional probe, in which FITC fluorescence emission (λexc: 494 nm, λem: 522 nm) facilitated cell uptake detection, in a time-dependent manner. The dual encapsulation-release profiles of the FITC-labeled Au-functionalized RNA particles were validated by time-dependent UV-Vis spectroscopy and spectrofluorimetry. These experiments respectively indicated an increase in FITC absorption (λabs: 494 nm) and fluorescence emission (λem: 522 nm) with increased sample incubation times, under physiological conditions. The release of Au-functionalized siRNA particles in prostate cancer (PC-3) cells resulted in concomitant knockdown of GRP75, which led to detectable levels of cell death in the absence of a transfection vector. Thus, the formulation of stable, small and discrete Au-functionalized RNA nanoparticles may prove to be valuable bifunctional probes in the theranostic study of cancer cells.
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Affiliation(s)
- Sunil S Shah
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, New Jersey 07079, USA.
| | - Christopher N Cultrara
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, New Jersey 07079, USA.
| | - Jorge A Ramos
- Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY 11367, USA and The PhD Programs in Biochemistry and Chemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA
| | - Uri Samuni
- Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY 11367, USA and The PhD Programs in Biochemistry and Chemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA
| | - Jenny Zilberberg
- Center for Discovery and Innovation, Hackensack University Medical Center, 340 Kingsland Street, Building 102, Nutley, New Jersey 07110, USA
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, New Jersey 07079, USA.
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Descalzi-Montoya D, Montel RA, Smith K, Dziopa E, Darwich A, Yang Z, Bitsaktsis C, Korngold R, Sabatino D. Synthetic Antibody Mimics Based on Cancer-Targeting Immunostimulatory Peptides. Chembiochem 2020; 22:1589-1596. [PMID: 32964656 DOI: 10.1002/cbic.202000407] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/16/2020] [Indexed: 11/08/2022]
Abstract
De novo cancer-targeting immunostimulatory peptides have been designed and developed as synthetic antibody mimics. A series of bifunctional peptides incorporating NKp30-binding and NK-cell-activating domains were synthesized as linear dimers and then extended into branching trimeric peptides by the incorporation of GRP78-targeting and tumor-cell-binding sequences. A selected trimeric peptide from this small set of peptides displayed binding capabilities on GRP78+ HepG2 and A549 target cells. Cell binding diminished in the presence of an anti-GRP78 peptide blocker, thus suggesting GRP78-binding dependence. Similarly, the selected trimeric peptide was also found to exhibit NK cell binding in an NKp30-dependent manner, which translated into NK cell activation as indicated by cytokine secretion. In co-culture, fluorescence microscopy revealed that the target GFP-expressing A549 cells were visibly associated with the effector NK cells when pre-activated with lead trimeric peptide. Accordingly, A549 cells were found to be compromised, as evidenced by the loss of GFP signal and notable detection of early-/late-stage apoptosis. Investigation of the immunological markers related to toxicity revealed detectable secretion of pro-inflammatory cytokines and chemokines, including IFN-γ, TNF-α, and IL-8. Furthermore, administration of peptide-activated NK cells into A549-tumor-bearing mice resulted in a consistent decrease in tumor growth when compared to the untreated control group. Taken together, the identification of a lead trimeric peptide capable of targeting and activating NK cells' immunotoxicity directly towards GRP78+ /B7H6- tumors provides a novel proof-of-concept for the development of cancer-targeting immunostimulatory peptide ligands that mimic antibody-targeting and -activating functions related to cancer immunotherapy applications.
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Affiliation(s)
- Dante Descalzi-Montoya
- Center for Discovery and Innovation, Hackensack-Meridian Health, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Rachel A Montel
- Department of Biological Sciences and Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
| | - Keith Smith
- Department of Biological Sciences and Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
| | - Eugenia Dziopa
- Center for Discovery and Innovation, Hackensack-Meridian Health, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Andrieh Darwich
- Department of Biological Sciences and Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
| | - Zheng Yang
- Center for Discovery and Innovation, Hackensack-Meridian Health, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Constantine Bitsaktsis
- Department of Biological Sciences and Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
| | - Robert Korngold
- Center for Discovery and Innovation, Hackensack-Meridian Health, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - David Sabatino
- Department of Biological Sciences and Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
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Abstract
The evolution of rapidly proliferating infectious and tumorigenic diseases has resulted in an urgent need to develop new and improved intervention strategies. Among the many therapeutic strategies at our disposal, our immune system remains the gold-standard in disease prevention, diagnosis, and treatment. Vaccines have played an important role in eradicating or mitigating the spread of infectious diseases by bolstering our immunity. Despite their utility, the design and development of new, more effective vaccines remains a public health necessity. Peptide-based vaccines have been developed for a wide range of established and emerging infectious and tumorigenic diseases. New innovations in epitope design and selection, synthesis, and formulation as well as screening techniques against immunological targets have led to more effective peptide vaccines. Current and future work is geared toward the translation of peptide vaccines from preclinical to clinical utility.
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Affiliation(s)
- David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States
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Proulx C, Zhang J, Sabatino D, Chemtob S, Ong H, Lubell WD. Synthesis and Biomedical Potential of Azapeptide Modulators of the Cluster of Differentiation 36 Receptor (CD36). Biomedicines 2020; 8:biomedicines8080241. [PMID: 32717955 PMCID: PMC7459725 DOI: 10.3390/biomedicines8080241] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/15/2020] [Accepted: 07/17/2020] [Indexed: 12/14/2022] Open
Abstract
The innovative development of azapeptide analogues of growth hormone releasing peptide-6 (GHRP-6) has produced selective modulators of the cluster of differentiation 36 receptor (CD36). The azapeptide CD36 modulators curb macrophage-driven inflammation and mitigate atherosclerotic and angiogenic pathology. In macrophages activated with Toll-like receptor-2 heterodimer agonist, they reduced nitric oxide production and proinflammatory cytokine release. In a mouse choroidal explant microvascular sprouting model, they inhibited neovascularization. In murine models of cardiovascular injury, CD36-selective azapeptide modulators exhibited cardioprotective and anti-atherosclerotic effects. In subretinal inflammation models, they altered activated mononuclear phagocyte metabolism and decreased immune responses to alleviate subsequent inflammation-dependent neuronal injury associated with retinitis pigmentosa, diabetic retinopathy and age-related macular degeneration. The translation of GHRP-6 to potent and selective linear and cyclic azapeptide modulators of CD36 is outlined in this review which highlights the relevance of turn geometry for activity and the biomedical potential of prototypes for the beneficial treatment of a wide range of cardiovascular, metabolic and immunological disorders.
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Affiliation(s)
- Caroline Proulx
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA;
| | - Jinqiang Zhang
- Innovative Drug Research Centre, Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China;
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Ave, South Orange, NJ 07079, USA;
| | - Sylvain Chemtob
- Département d’Ophtalmologie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada;
| | - Huy Ong
- Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada;
| | - William D. Lubell
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC H3C3J7, Canada
- Correspondence:
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Sabatino D, Tillman M, Pawasauskas J, Brothers T. Nonsteroidal anti-inflammatory drug induced acute kidney injury; A review and case study. J Renal Inj Prev 2020. [DOI: 10.34172/jrip.2020.30] [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: 11/09/2022] Open
Abstract
Introduction: The use of nonsteroidal anti-inflammatory drugs (NSAIDs) are one of the most commonly therapeutic classes and are responsible for ten percent of medications dispensed annually. Twelve percent of individuals currently report taking a NSAID daily. Renal injury caused by these agents can present in various forms, resulting from either acute or chronic use. Historically approximately five percent of patients initiated on NSAIDs experience a kidney-related adverse event. Drug-induced renal injury accounts for twenty percent of episodes of acute kidney injury (AKI). Patients requiring renal replacement therapy (RRT) have experienced an increased length of stay with associated healthcare costs per incident. The adverse effects of NSAIDs contribute to a significant economic burden, both to the patient and to the healthcare system. Methods: A medical literature review was composed. Results: Numerous risk factors contribute to the development of drug-induced renal injury and disease. Patient specific factors include volume depletion and comorbid conditions. External risk factors such as use of high-risk medications and diagnostic contrast dyes contribute to the increased risk. Implementation of risk mitigation and educational strategies targeting healthcare professionals has the potential to decrease negative clinical and economic outcomes. Conclusion: Healthcare providers’ understanding of the pathophysiology, diagnostic criteria, and risk factors associated with AKI is vital to improve patient outcomes. Proactively screening high risk patients and utilizing appropriate mitigation strategies contributes to limiting the incidence and severity of injury. When the use of NSAIDs cannot be avoided, utilization of lower doses may be a suitable alternative.
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Affiliation(s)
- David Sabatino
- University of Rhode Island College of Pharmacy; 7 Greenhouse Road Kingston, Rhode Island, USA
| | - Michael Tillman
- University of Rhode Island College of Pharmacy; 7 Greenhouse Road Kingston, Rhode Island, USA
| | - Jayne Pawasauskas
- University of Rhode Island College of Pharmacy; 7 Greenhouse Road Kingston, Rhode Island, USA
- Department of Pharmacy Kent Hospital; 455 Toll Gate Road Warwick, Rhode Island, USA
| | - Todd Brothers
- University of Rhode Island College of Pharmacy; 7 Greenhouse Road Kingston, Rhode Island, USA
- Department of Pharmacy Roger Williams Medical Center; 825 Chalkstone Avenue Providence, Rhode Island, USA
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Shah SS, Casanova N, Antuono G, Sabatino D. Polyamide Backbone Modified Cell Targeting and Penetrating Peptides in Cancer Detection and Treatment. Front Chem 2020; 8:218. [PMID: 32296681 PMCID: PMC7136562 DOI: 10.3389/fchem.2020.00218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 03/09/2020] [Indexed: 12/15/2022] Open
Abstract
Cell penetrating and targeting peptides (CPPs and CTPs) encompass an important class of biochemically active peptides owning the capabilities of targeting and translocating within selected cell types. As such, they have been widely used in the delivery of imaging and therapeutic agents for the diagnosis and treatment of various diseases, especially in cancer. Despite their potential utility, first generation CTPs and CPPs based on the native peptide sequences are limited by poor biological and pharmacological properties, thereby restricting their efficacy. Therefore, medicinal chemistry approaches have been designed and developed to construct related peptidomimetics. Of specific interest herein, are the design applications which modify the polyamide backbone of lead CTPs and CPPs. These modifications aim to improve the biochemical characteristics of the native peptide sequence in order to enhance its diagnostic and therapeutic capabilities. This review will focus on a selected set of cell penetrating and targeting peptides and their related peptidomimetics whose polyamide backbone has been modified in order to improve their applications in cancer detection and treatment.
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Affiliation(s)
- Sunil S Shah
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ, United States
| | - Nelson Casanova
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ, United States
| | - Gina Antuono
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ, United States
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ, United States
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Cultrara CN, Shah S, Antuono G, Heller CJ, Ramos JA, Samuni U, Zilberberg J, Sabatino D. Size Matters: Arginine-Derived Peptides Targeting the PSMA Receptor Can Efficiently Complex but Not Transfect siRNA. Mol Ther Nucleic Acids 2019; 18:863-870. [PMID: 31739211 PMCID: PMC6861565 DOI: 10.1016/j.omtn.2019.10.013] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 10/04/2019] [Accepted: 10/09/2019] [Indexed: 10/26/2022]
Abstract
Oligoarginine sequences conjugated to a short cancer-targeting peptide (CTP) selective for the prostate-specific membrane antigen (PSMA) receptor was developed for selective small interfering RNA (siRNA) delivery to a human metastatic/castration-resistant prostate cancer (PCa) cell line, which expresses PSMA on the surface. The PSMA-Rn (n = 6 and 9) peptides were synthesized by solid-phase peptide synthesis, characterized by liquid chromatography-mass spectrometry (LC-MS) and condensed with glucose-regulated protein (GRP)-silencing siRNAs. Native gels showed formation of stable CTP:siRNA ionic complexes. Furthermore, siRNA release was effected by heparin competition, supporting the peptides' capabilities to act as condensing and releasing agents. However, dynamic light scattering (DLS) and transmission electron microscopy (TEM) studies revealed large anionic complexes that were prone to aggregation and limited cell uptake for RNAi activity. Taken together, these data support the notion that the development of efficient peptide-based siRNA delivery systems is in part contingent on the formulation of discrete nanoparticles that can effectively condense and release siRNA in cells.
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Affiliation(s)
- Christopher N Cultrara
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
| | - Sunil Shah
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
| | - Gina Antuono
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
| | - Claudia J Heller
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA
| | - Jorge A Ramos
- Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY 11367, USA; PhD Programs in Biochemistry and Chemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA
| | - Uri Samuni
- Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY 11367, USA; PhD Programs in Biochemistry and Chemistry, The Graduate Center of the City University of New York, New York, NY 10016, USA
| | - Jenny Zilberberg
- Center for Discovery and Innovation, Hackensack University Medical Center, 340 Kingsland Street, Building 102, Nutley, NJ 07110, USA
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA.
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Sarkar B, Siddiqui Z, Nguyen PK, Dube N, Fu W, Park S, Jaisinghani S, Paul R, Kozuch SD, Deng D, Iglesias-Montoro P, Li M, Sabatino D, Perlin DS, Zhang W, Mondal J, Kumar VA. Membrane-Disrupting Nanofibrous Peptide Hydrogels. ACS Biomater Sci Eng 2019; 5:4657-4670. [DOI: 10.1021/acsbiomaterials.9b00967] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Biplab Sarkar
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Zain Siddiqui
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Peter K. Nguyen
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Namita Dube
- Center for Interdisciplinary Sciences, Tata Institute of Fundamental Research, 500075 Hyderabad, India
| | - Wanyi Fu
- Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Steven Park
- Public Health Research Institute, Rutgers University—New Jersey Medical School, Newark, New Jersey 07103, United States
| | - Shivani Jaisinghani
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Reshma Paul
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Stephen D. Kozuch
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079-2646, United States
| | - Daiyong Deng
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Patricia Iglesias-Montoro
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Mengyan Li
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079-2646, United States
| | - David S. Perlin
- Public Health Research Institute, Rutgers University—New Jersey Medical School, Newark, New Jersey 07103, United States
| | - Wen Zhang
- Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
| | - Jagannath Mondal
- Center for Interdisciplinary Sciences, Tata Institute of Fundamental Research, 500075 Hyderabad, India
| | - Vivek A. Kumar
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, United States
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey 07103, United States
- Department of Restorative Dentistry, Rutgers School of Dental Medicine, Newark, New Jersey 07103 United States
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Cultrara C, Sabatino D, Zilberberg J. Abstract 5171: GRP78 as a potential modulator of cell adhesion markers in metastatic prostate cancer and multiple myeloma. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-5171] [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
Background: Glucose regulated protein 78 (GRP78) is a resident chaperone of the endoplasmic reticulum and a master regulator of the unfolded protein response under physiological and pathological cell stress conditions. GRP78 is overexpressed in many cancers, regulating a variety of signaling pathways associated with tumor initiation, proliferation, adhesion and invasion which contributes to metastatic spread. GRP78 can also regulate cell survival and apoptotic pathways to alter responsiveness to anticancer drugs. Tumors that reside in or metastasize to the bone and bone marrow (BM) space can develop pro-survival signals through their direct adhesive interactions with stromal elements of this niche thereby resisting the cytotoxic effects of drug treatment. In this study, we report a direct correlation between GRP78 and the adhesion molecule N-cadherin (N-cad), known to play a critical role in the adhesive interactions of multiple myeloma and metastatic prostate cancer with the bone microenvironment.
Methods: N-cad expression levels (transcription and protein) were evaluated upon siRNA mediated silencing of GRP78 in the MM.1S multiple myeloma and the PC3 metastatic prostate cancer cell lines. Furthermore, we evaluated the effects of GRP78 knockdown (KD) on epithelial-mesenchymal (EMT) transition markers, morphological changes and adhesion of PC3 cells.
Results: We demonstrate that GRP78 KD: 1) induced the concomitant downregulation of N-cad in both PC3 and MM.1S cells, 2) resulted in significant decreases of both N-cad and E-cad protein levels in PC3 cells, 3) induced TGF-β1 and Snail-2 expression, potentially accounting for the observed downregulation of E-cad. Our data also suggests that N-cad regulation via GRP78 KD supersedes the effects of TGF-β1; i.e., N-cad was downregulated in spite of the fact that TGF-β1 expression was significantly increased upon GRP78 KD.
Conclusion: This work implicates GRP78 as a modulator of cell adhesion markers in MM and PCa. Our results may have clinical implications underscoring GRP78 as a potential therapeutic target to reduce the adhesive nature of metastatic tumors to the bone niche.
Citation Format: Christopher Cultrara, David Sabatino, Jenny Zilberberg. GRP78 as a potential modulator of cell adhesion markers in metastatic prostate cancer and multiple myeloma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 5171.
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Cultrara CN, Shah S, Kozuch SD, Patel MR, Sabatino D. Solid phase synthesis and self-assembly of higher-order siRNAs and their bioconjugates. Chem Biol Drug Des 2018; 93:999-1010. [PMID: 30480355 DOI: 10.1111/cbdd.13448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 10/10/2018] [Accepted: 11/11/2018] [Indexed: 12/20/2022]
Abstract
New methods for the synthesis of higher-order siRNA motifs and their bioconjugates have recently gained widespread attention in the development of new and improved gene therapeutics. Our efforts aim to produce new chemical tools and protocols for the generation of modified siRNAs that screen for important oncogene targets as well as silence their activity for effective gene therapy in cancer models. More specifically, we have developed an efficient solution-phase synthesis for the production of a ribouridine branchpoint synthon that can be effectively incorporated by solid phase synthesis within higher-order RNA structures, including those adopting V-, and Y- and >-< shape RNA templates. Self-assembly of complementary RNA to the template strands produced higher-order siRNA nanostructures that were characterized by a combination of PAGE, DLS, and TEM techniques. In an effort to extend the repertoire of functionally diverse siRNAs, we have also developed solid phase bioconjugation strategies for incorporating bio-active probes such as fatty acid appendages and fluorescent reporters. Taken together, these methods highlight the ability to generate higher-order siRNAs and their bioconjugates for exploring the influence of modified siRNA structure on anti-cancer activity.
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Affiliation(s)
- Christopher N Cultrara
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey
| | - Sunil Shah
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey
| | - Stephen D Kozuch
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey
| | | | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey
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14
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Cultrara CN, Kozuch SD, Ramasundaram P, Heller CJ, Shah S, Beck AE, Sabatino D, Zilberberg J. GRP78 modulates cell adhesion markers in prostate Cancer and multiple myeloma cell lines. BMC Cancer 2018; 18:1263. [PMID: 30563499 PMCID: PMC6299583 DOI: 10.1186/s12885-018-5178-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 12/04/2018] [Indexed: 12/22/2022] Open
Abstract
Background Glucose regulated protein 78 (GRP78) is a resident chaperone of the endoplasmic reticulum and a master regulator of the unfolded protein response under physiological and pathological cell stress conditions. GRP78 is overexpressed in many cancers, regulating a variety of signaling pathways associated with tumor initiation, proliferation, adhesion and invasion which contributes to metastatic spread. GRP78 can also regulate cell survival and apoptotic pathways to alter responsiveness to anticancer drugs. Tumors that reside in or metastasize to the bone and bone marrow (BM) space can develop pro-survival signals through their direct adhesive interactions with stromal elements of this niche thereby resisting the cytotoxic effects of drug treatment. In this study, we report a direct correlation between GRP78 and the adhesion molecule N-cadherin (N-cad), known to play a critical role in the adhesive interactions of multiple myeloma and metastatic prostate cancer with the bone microenvironment. Methods N-cad expression levels (transcription and protein) were evaluated upon siRNA mediated silencing of GRP78 in the MM.1S multiple myeloma and the PC3 metastatic prostate cancer cell lines. Furthermore, we evaluated the effects of GRP78 knockdown (KD) on epithelial-mesenchymal (EMT) transition markers, morphological changes and adhesion of PC3 cells. Results GRP78 KD led to concomitant downregulation of N-cad in both tumors types. In PC3 cells, GRP78 KD significantly decreased E-cadherin (E-cad) expression likely associated with the induction in TGF-β1 expression. Furthermore, GRP78 KD also triggered drastic changes in PC3 cells morphology and decreased their adhesion to osteoblasts (OSB) dependent, in part, to the reduced N-cad expression. Conclusion This work implicates GRP78 as a modulator of cell adhesion markers in MM and PCa. Our results may have clinical implications underscoring GRP78 as a potential therapeutic target to reduce the adhesive nature of metastatic tumors to the bone niche. Electronic supplementary material The online version of this article (10.1186/s12885-018-5178-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Christopher N Cultrara
- Department of Chemistry and Biochemistry, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - Stephen D Kozuch
- Department of Chemistry and Biochemistry, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - Poornema Ramasundaram
- Center for Discovery and Innovation, Hackensack University Medical Center, 340 Kingsland Street, Building 102, Nutley, NJ, 07110, USA
| | - Claudia J Heller
- Department of Chemistry and Biochemistry, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - Sunil Shah
- Department of Chemistry and Biochemistry, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - Adah E Beck
- Department of Chemistry and Biochemistry, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - David Sabatino
- Department of Chemistry and Biochemistry, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - Jenny Zilberberg
- Center for Discovery and Innovation, Hackensack University Medical Center, 340 Kingsland Street, Building 102, Nutley, NJ, 07110, USA.
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15
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Kozuch S, Cultrara CN, Beck AE, Heller CJ, Shah S, Patel MR, Zilberberg J, Sabatino D. Enhanced Cancer Theranostics with Self-Assembled, Multilabeled siRNAs. ACS Omega 2018; 3:12975-12984. [PMID: 30411024 PMCID: PMC6217585 DOI: 10.1021/acsomega.8b01999] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 09/26/2018] [Indexed: 05/12/2023]
Abstract
The integration of therapy and diagnostics, termed "theranostics", has recently gained widespread utility in the development of new and improved therapeutics that effectively diagnose and treat diseases, such as cancer. In this study, the covalent attachment of multiple fluorescent labels (i.e., fluorescein isothiocyanate (FITC)) to a wide range of siRNAs, including those adopting linear, V- and Y-shape nanostructures, was successfully accomplished by solid-phase bioconjugation for monitoring cell uptake, co-localization, and biological activity in cell culture. The FITC-labeled higher-order V- and Y-shape siRNAs maintained the requisite hybrid stabilities and A-type helical structures for invoking RNAi activity. The FITC-siRNA hybrids with sense-strand modifiers enabled efficient mRNA knockdown (∼50-90%), which also translated to increased cell death (∼20-95%) in a bone metastatic prostate cancer cell line, over a 72 h incubation period. Significantly, the Y-shaped siRNA containing three FITC probes enhanced fluorescent signaling relative to the siRNA constructs containing single and double fluorophores while retaining potent knockdown and cell death effects post-transfection. Taken together, this data highlights the theranostic utility of the multilabeled FITC-siRNA constructs for potential cancer gene therapy applications.
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Affiliation(s)
- Stephen
D. Kozuch
- Department
of Chemistry and Biochemistry, Seton Hall
University, South
Orange, New Jersey 07079, United States
| | - Christopher N. Cultrara
- Department
of Chemistry and Biochemistry, Seton Hall
University, South
Orange, New Jersey 07079, United States
| | - Adah E. Beck
- Department
of Chemistry and Biochemistry, Seton Hall
University, South
Orange, New Jersey 07079, United States
| | - Claudia J. Heller
- Department
of Chemistry and Biochemistry, Seton Hall
University, South
Orange, New Jersey 07079, United States
| | - Sunil Shah
- Department
of Chemistry and Biochemistry, Seton Hall
University, South
Orange, New Jersey 07079, United States
| | - Mayurbhai R. Patel
- Department
of Chemistry and Biochemistry, Seton Hall
University, South
Orange, New Jersey 07079, United States
- Nitto
Denko Avecia Inc, 8560
Reading Road, Cincinnati, Ohio 45215, United
States
| | - Jenny Zilberberg
- Department
of Biomedical Research, Hackensack University
Medical Center, Hackensack, New Jersey 07601, United States
| | - David Sabatino
- Department
of Chemistry and Biochemistry, Seton Hall
University, South
Orange, New Jersey 07079, United States
- E-mail: . Tel: +1-973-313-6359
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16
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Shah SS, Cultrara CN, Kozuch SD, Patel MR, Ramos JA, Samuni U, Zilberberg J, Sabatino D. Direct Transfection of Fatty Acid Conjugated siRNAs and Knockdown of the Glucose-Regulated Chaperones in Prostate Cancer Cells. Bioconjug Chem 2018; 29:3638-3648. [PMID: 30235926 DOI: 10.1021/acs.bioconjchem.8b00580] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The emerging field of RNAi nanotechnology has led to rapid advances in the applications of siRNAs in chemical biology, medicinal chemistry, and biotechnology. In our RNAi approach, bioconjugation of linear, V-, and Y-shaped RNA templates were designed using a series of saturated and unsaturated fatty acids to improve cell uptake and knockdown efficacy of the oncogenic glucose regulated proteins (GRPs) in prostate (PC-3) cancer cells. An optimized HCTU-coupling procedure was developed for tagging variable saturated and unsaturated fatty acids onto the 5'-ends of linear and V-shaped RNA templates that were constructed by semiautomated solid phase RNA synthesis. Hybridization and self-assembly of complementary strands yielded linear, V-, and Y-shaped fatty acid-conjugated siRNAs which were characterized by native PAGE. CD spectroscopy confirmed their A-type helix conformations. RP IP HPLC provided trends in amphiphilic properties, whereas DLS and TEM confirmed multicomponent self-assembled structures that were prone to aggregation. Subsequently, the fatty acid conjugated siRNA bioconjugates were tested for their RNAi activity by direct transfection within PC-3 cells known to overexpress oncogenic GRP activity. The siRNA bioconjugates with sense strand modifiers provided more potent GRP knockdown relative to the antisense modified siRNAs, but to a lesser extent when compared to the unconjugated siRNA controls that were transfected with the commercial Trans-IT X2 dynamic delivery system. Flow cytometry revealed that the latter may be at least in part attributed to limited cell uptake of the fatty acid conjugated siRNAs. Nonetheless, these new constructs represent an entry point in modifying higher-order siRNA constructs that may lead to the generation of more efficient siRNA bioconjugates for screening important oncogene targets and for cancer gene therapy applications.
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Affiliation(s)
- Sunil S Shah
- Department of Chemistry and Biochemistry , Seton Hall University , South Orange , New Jersey 07079 , United States
| | - Christopher N Cultrara
- Department of Chemistry and Biochemistry , Seton Hall University , South Orange , New Jersey 07079 , United States
| | - Stephen D Kozuch
- Department of Chemistry and Biochemistry , Seton Hall University , South Orange , New Jersey 07079 , United States
| | - Mayurbhai R Patel
- Nitto Denko Avecia Inc. , 8560 Reading Road , Cincinnati , Ohio 45215 , United States
| | - Jorge A Ramos
- Department of Chemistry and Biochemistry , Queens College, City University of New York , Flushing , New York 11367 , United States.,Ph.D. Programs in Biochemistry and Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
| | - Uri Samuni
- Department of Chemistry and Biochemistry , Queens College, City University of New York , Flushing , New York 11367 , United States.,Ph.D. Programs in Biochemistry and Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
| | - Jenny Zilberberg
- Department of Biomedical Research , Hackensack University Medical Center , 40 Prospect Avenue , Hackensack , New Jersey 07601 , United States
| | - David Sabatino
- Department of Chemistry and Biochemistry , Seton Hall University , South Orange , New Jersey 07079 , United States
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17
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Rana N, Cultrara C, Phillips M, Sabatino D. Functionalization of peptide nucleolipid bioconjugates and their structure anti-cancer activity relationship studies. Bioorg Med Chem Lett 2017; 27:4019-4023. [PMID: 28789897 DOI: 10.1016/j.bmcl.2017.07.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 07/13/2017] [Accepted: 07/21/2017] [Indexed: 11/15/2022]
Abstract
In the search for more potent peptide-based anti-cancer conjugates the generation of new, functionally diverse nucleolipid derived D-(KLAKLAK)2-AK sequences has enabled a structure and anti-cancer activity relationship study. A reductive amination approach was key for the synthesis of alkylamine, diamine and polyamine derived nucleolipids as well as those incorporating heterocyclic functionality. The carboxy-derived nucleolipids were then coupled to the C-terminus of the D-(KLAKLAK)2-AK killer peptide sequence and produced with and without the FITC fluorophore for investigating biological activity in cancer cells. The amphiphilic, α-helical peptide-nucleolipid bioconjugates were found to exhibit variable effects on the viability of MM.1S cells, with the histamine derived nucleolipid peptide bioconjugate displaying the most significant anti-cancer effects. Thus, functionally diverse nucleolipids have been developed to fine-tune the structure and anti-cancer properties of killer peptide sequences, such as D-(KLAKLAK)2-AK.
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Affiliation(s)
- Niki Rana
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, United States
| | - Christopher Cultrara
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, United States
| | - Mariana Phillips
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, United States
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, United States.
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18
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Carrión EN, Santiago J, Sabatino D, Gorun SM. Synthesis and Photophysical and Photocatalytic Properties of a Highly Fluorinated and Durable Phthalocyanine–Peptide Bioconjugate for Potential Theranostic Applications. Inorg Chem 2017; 56:7210-7216. [DOI: 10.1021/acs.inorgchem.7b00847] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Erik N. Carrión
- Center for Functional
Materials, Seton Hall University, 400 South Orange Avenue, South Orange, New Jersey 07079, United States
- Department
of Chemistry and Biochemistry, Seton Hall University, 400 South
Orange Avenue, South Orange, New Jersey 07079, United States
| | - Jenyffer Santiago
- Center for Functional
Materials, Seton Hall University, 400 South Orange Avenue, South Orange, New Jersey 07079, United States
- Department
of Chemistry and Biochemistry, Seton Hall University, 400 South
Orange Avenue, South Orange, New Jersey 07079, United States
| | - David Sabatino
- Department
of Chemistry and Biochemistry, Seton Hall University, 400 South
Orange Avenue, South Orange, New Jersey 07079, United States
| | - Sergiu M. Gorun
- Center for Functional
Materials, Seton Hall University, 400 South Orange Avenue, South Orange, New Jersey 07079, United States
- Department
of Chemistry and Biochemistry, Seton Hall University, 400 South
Orange Avenue, South Orange, New Jersey 07079, United States
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19
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Bitsaktsis C, Phillips M, Sabatino D. Utilization of protein-peptide conjugates for NK cell activation as a strategy for cancer immunotherapy. The Journal of Immunology 2017. [DOI: 10.4049/jimmunol.198.supp.130.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Cancer-based immunotherapy aims to develop biologics that can stimulate immune responses towards tumor eradication, as is the case of monoclonal antibodies (mAb) and their related analogs. Although the latter have been the most prevalently used biologics in cancer immunotherapy strategies, novel therapeutics may overcome their production, administration, and pharmacological limitations. The synthesis of intermediate size molecules, particularly chemically synthesized protein-peptide bioconjugates (PPB), possessing the targeting and effector functions of antibodies, represent a novel class of immunotherapeutics that may circumvent these limitations. In this study we proposed and executed the rational design of a novel class of cancer-targeting immunostimulatory protein-peptide conjugates (CTIPPC) that may potentially work as a synthetic antibody mimic. In this proof-of-concept, the CTIPPC aimed to target the tumor expressed GRP78, while recruiting and activating NK cells for tumor targeted immunotherapy. The sustained capabilities of the CTIPP conjugates to elicit NK-dependent immunostimmulatory activities were assessed via measuring cytokine secretion, NK cell migration, and the overall anti-tumor cytotoxic activity of NK cells. These studies shed important insights into the effective design, preparation and biological evaluation of a new class of semi-synthetic protein-peptide conjugates.
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20
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Phillips M, Romeo F, Bitsaktsis C, Sabatino D. B7H6-derived peptides trigger TNF-α-dependent immunostimulatory activity of lymphocytic NK92-MI cells. Biopolymers 2017; 106:658-72. [PMID: 27216712 DOI: 10.1002/bip.22879] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 12/17/2015] [Revised: 05/03/2016] [Accepted: 05/18/2016] [Indexed: 11/10/2022]
Abstract
The rise of biologics that can stimulate immune responses towards the eradication of tumors has led to the evolution of cancer-based immunotherapy. Representatively, B7H6 has been recently identified as a protein ligand on tumor cells that binds specifically to the NKp30 receptor and triggers NK cell-derived cytokine production, which ultimately leads to tumor cell lysis and death. In an effort to develop effective immunotherapy approaches, the rational design of a novel class of immunostimulatory peptides (IPs) derived from the binding interface of B7H6:NKp30 is described in this study. The IPs comprised the B7H6 active site sequence for NKp30 binding and immunostimulatory activity. An aminohexanoic acid linker was also introduced at the N-terminus of the peptides for FITC-labeling by Fmoc-solid phase peptide synthesis. The peptides were characterized by LCMS to confirm identities and purities >95%. The secondary structures of the peptides were examined by CD spectroscopy in H2 O, PBS and a H2 O:TFE mixture which demonstrated versatile peptide structures which transitioned from random coil (H2 O) to α-helical (PBS) and turn-type (H2 O:TFE) conformations. Their biological properties were then evaluated by flow cytometry, enzyme-linked immunosorbent assays (ELISAs), and cell death assays. The occupancy of the synthetic peptides to a human NK cell line demonstrated comparable binding relative to the natural NKp30 ligand, B7H6, and the human anti-NKp30 monoclonal antibody (mAb), in a concentration dependent manner. A competitive binding assay between the human anti-NKp30 mAb or B7H6, and the synthetic peptides, demonstrated partial displacement of the ligands upon anti-NKp30 mAb treatment, suggesting NKp30 receptor specificities by the synthetic peptides. Moreover, the immunostimulatory activity of B7H6 was demonstrated by the secretion of the pro-inflammatory cytokines tumor necrosis factor-alfa (TNF-α) and interferon gamma (IFN-γ) by the human NK cell line. The immunostimulatory effects of IPs on the NK cells was assessed by the production of TNF-α alone as IFN-γ was undetectable. In a cell death assay, the IPs were found to be nontoxic, without any observable evidence of early or late stage apoptosis within the NK92-MI cells. Taking these findings together, this novel class of synthetic peptides may prove to be a promising lead in the development of a peptide-based immunotherapy approach, especially against B7H6 expressing tumors. © 2016 Wiley Periodicals, Inc. Biopolymers (Pept Sci) 106: 658-672, 2016.
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Affiliation(s)
- Mariana Phillips
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ, 07079
| | - Francesca Romeo
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ, 07079
| | | | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ, 07079.
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21
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Patel MR, Kozuch SD, Cultrara CN, Yadav R, Huang S, Samuni U, Koren J, Chiosis G, Sabatino D. RNAi Screening of the Glucose-Regulated Chaperones in Cancer with Self-Assembled siRNA Nanostructures. Nano Lett 2016; 16:6099-6108. [PMID: 27669096 PMCID: PMC5378679 DOI: 10.1021/acs.nanolett.6b02274] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The emerging field of RNA nanotechnology has been used to design well-programmed, self-assembled nanostructures for applications in chemistry, biology, and medicine. At the forefront of its utility in cancer is the unrestricted ability to self-assemble multiple siRNAs within a single nanostructure formulation for the RNAi screening of a wide range of oncogenes while potentiating the gene therapy of malignant tumors. In our RNAi nanotechnology approach, V- and Y-shape RNA templates were designed and constructed for the self-assembly of discrete, higher-ordered siRNA nanostructures targeting the oncogenic glucose regulated chaperones. The GRP78-targeting siRNAs self-assembled into genetically encoded spheres, triangles, squares, pentagons and hexagons of discrete sizes and shapes according to TEM imaging. Furthermore, gel electrophoresis, thermal denaturation, and CD spectroscopy validated the prerequisite siRNA hybrids for their RNAi application. In a 24 sample siRNA screen conducted within the AN3CA endometrial cancer cells known to overexpress oncogenic GRP78 activity, the self-assembled siRNAs targeting multiple sites of GRP78 expression demonstrated more potent and long-lasting anticancer activity relative to their linear controls. Extending the scope of our RNAi screening approach, the self-assembled siRNA hybrids (5 nM) targeting of GRP-75, 78, and 94 resulted in significant (50-95%) knockdown of the glucose regulated chaperones, which led to synergistic effects in tumor cell cycle arrest (50-80%) and death (50-60%) within endometrial (AN3CA), cervical (HeLa), and breast (MDA-MB-231) cancer cell lines. Interestingly, a nontumorigenic lung (MRC5) cell line displaying normal glucose regulated chaperone levels was found to tolerate siRNA treatment and demonstrated less toxicity (5-20%) relative to the cancer cells that were found to be addicted to glucose regulated chaperones. These remarkable self-assembled siRNA nanostructures may thus encompass a new class of potent siRNAs that may be useful in screening important oncogene targets while improving siRNA therapeutic efficacy and specificity in cancer.
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Affiliation(s)
- Mayurbhai R. Patel
- Program in Chemical Biology and Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States
| | - Stephen D. Kozuch
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States
| | - Christopher N. Cultrara
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States
| | - Reeta Yadav
- Department of Chemistry and Biochemistry, Queens College, City University of New York, 65-30 Kissena Blvd., Flushing, New York 11367, United States
- Ph.D. Programs in Chemistry and Biochemistry, The Graduate Center of the City University of New York, New York City, New York 10016, United States
| | - Suiying Huang
- Department of Chemistry and Biochemistry, Queens College, City University of New York, 65-30 Kissena Blvd., Flushing, New York 11367, United States
- Ph.D. Programs in Chemistry and Biochemistry, The Graduate Center of the City University of New York, New York City, New York 10016, United States
| | - Uri Samuni
- Department of Chemistry and Biochemistry, Queens College, City University of New York, 65-30 Kissena Blvd., Flushing, New York 11367, United States
- Ph.D. Programs in Chemistry and Biochemistry, The Graduate Center of the City University of New York, New York City, New York 10016, United States
| | - John Koren
- Program in Chemical Biology and Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Gabriela Chiosis
- Program in Chemical Biology and Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States
- Corresponding Author.
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22
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Rana N, Huang S, Patel P, Samuni U, Sabatino D. Synthesis, characterization and anti-cancer activity of a peptide nucleolipid bioconjugate. Bioorg Med Chem Lett 2016; 26:3567-71. [DOI: 10.1016/j.bmcl.2016.06.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 05/31/2016] [Accepted: 06/08/2016] [Indexed: 10/21/2022]
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23
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Patel P, Patel HH, Borland E, Gorun SM, Sabatino D. Chemically robust fluoroalkyl phthalocyanine-oligonucleotide bioconjugates and their GRP78 oncogene photocleavage activity. Chem Commun (Camb) 2016; 50:6309-11. [PMID: 24663147 DOI: 10.1039/c4cc00703d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first representative of functionalized fluoroalkyl phthalocyanines, F48H7(COOH)PcZn, is reported. The complex generates (1)O2 affording long-lasting photooxidation of an external substrate without self-decomposition. The carboxylic group couples with an antisense oligonucleotide targeting GRP78 oncogenes, resulting in the F48H7PcZn-cancer targeting oligonucleotide (CTO). The bioconjugated fluorophthalocyanine effectively hybridizes complementary GRP78 DNA and mRNA sequences. Piperidine cleavage assays reveal desired photochemical oligonucleotide oxidative degradation for both F48H7PcZn-CTO:DNA and F48H7PcZn-CTO:mRNA hybrids. This new materials strategy could be extended to other functional fluorinated phthalocyanines-antisense oligonucleotide combinations for long-lasting oncogene-targeting photodynamic therapy.
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Affiliation(s)
- Pradeepkumar Patel
- Department of Chemistry and Biochemistry, Seton Hall University, South Orange, NJ 07079, USA.
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24
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Patel PL, Rana NK, Patel MR, Kozuch SD, Sabatino D. Nucleic Acid Bioconjugates in Cancer Detection and Therapy. ChemMedChem 2015; 11:252-69. [PMID: 26663095 DOI: 10.1002/cmdc.201500502] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 11/23/2015] [Indexed: 12/28/2022]
Abstract
Nucleoside- and nucleotide-based chemotherapeutics have been used to treat cancer for more than 50 years. However, their inherent cytotoxicities and the emergent resistance of tumors against treatment has inspired a new wave of compounds in which the overall pharmacological profile of the bioactive nucleic acid component is improved by conjugation with delivery vectors, small-molecule drugs, and/or imaging modalities. In this manner, nucleic acid bioconjugates have the potential for targeting and effecting multiple biological processes in tumors, leading to synergistic antitumor effects. Consequently, tumor resistance and recurrence is mitigated, leading to more effective forms of cancer therapy. Bioorthogonal chemistry has led to the development of new nucleoside bioconjugates, which have served to improve treatment efficacy en route towards FDA approval. Similarly, oligonucleotide bioconjugates have shown encouraging preclinical and clinical results. The modified oligonucleotides and their pharmaceutically active formulations have addressed many weaknesses of oligonucleotide-based drugs. They have also paved the way for important advancements in cancer diagnosis and treatment. Cancer-targeting ligands such as small-molecules, peptides, and monoclonal antibody fragments have all been successfully applied in oligonucleotide bioconjugation and have shown promising anticancer effects in vitro and in vivo. Thus, the application of bioorthogonal chemistry will, in all likelihood, continue to supply a promising pipeline of nucleic acid bioconjugates for applications in cancer detection and therapy.
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Affiliation(s)
- Pradeepkumar L Patel
- Sun Pharmaceutical Industries Inc., Analytical Research and Development, 270 Prospect Plains Road, Cranbury, NJ, 08512, USA
| | - Niki K Rana
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - Mayurbhai R Patel
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - Stephen D Kozuch
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ, 07079, USA
| | - David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ, 07079, USA.
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Abstract
We have proposed that modified platelets could potentially be used to correct intrinsic platelet defects as well as for targeted delivery of therapeutic molecules to sights of vascular injury. Ectopic expression of proteins within α-granules prior to platelet activation has been achieved for several proteins, including urokinase, factor (F) VIII, and partially for FIX. Potential uses of platelet-directed therapeutics will be discussed, focusing on targeted delivery of urokinase as a thromboprophylactic agent and FVIII for the treatment of hemophilia A patients with intractable inhibitors. This presentation will discuss new strategies that may be useful in the care of patients with vascular injury as well as remaining challenges and limitations of these approaches.
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Affiliation(s)
- R Lyde
- Division of Hematology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pharmacology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - D Sabatino
- Division of Hematology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - S K Sullivan
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, University of Mississippi Medical Center, Jackson, MS, USA
| | - M Poncz
- Division of Hematology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
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Kurian LA, Silva TA, Sabatino D. Submonomer synthesis of azapeptide ligands of the Insulin Receptor Tyrosine Kinase domain. Bioorg Med Chem Lett 2014; 24:4176-80. [DOI: 10.1016/j.bmcl.2014.07.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 07/15/2014] [Accepted: 07/16/2014] [Indexed: 10/25/2022]
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27
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Joseph SC, Blackman BA, Kelly ML, Phillips M, Beaury MW, Martinez I, Parronchi CJ, Bitsaktsis C, Blake AD, Sabatino D. Synthesis, characterization, and biological activity of poly(arginine)-derived cancer-targeting peptides in HepG2 liver cancer cells. J Pept Sci 2014; 20:736-45. [PMID: 24931620 DOI: 10.1002/psc.2665] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 04/17/2014] [Accepted: 05/13/2014] [Indexed: 11/12/2022]
Abstract
The solid-phase synthesis, structural characterization, and biological evaluation of a small library of cancer-targeting peptides have been determined in HepG2 hepatoblastoma cells. These peptides are based on the highly specific Pep42 motif, which has been shown to target the glucose-regulated protein 78 receptors overexpressed and exclusively localized on the cell surface of tumors. In this study, Pep42 was designed to contain varying lengths (3-12) of poly(arginine) sequences to assess their influence on peptide structure and biology. Peptides were effectively synthesized by 9-fluorenylmethoxycarbonyl-based solid-phase peptide synthesis, in which the use of a poly(ethylene glycol) resin provided good yields (14-46%) and crude purities >95% as analyzed by liquid chromatography-mass spectrometry. Peptide structure and biophysical properties were investigated using circular dichroism spectroscopy. Interestingly, peptides displayed secondary structures that were contingent on solvent and length of the poly(arginine) sequences. Peptides exhibited helical and turn conformations, while retaining significant thermal stability. Structure-activity relationship studies conducted by flow cytometry and confocal microscopy revealed that the poly(arginine) derived Pep42 sequences maintained glucose-regulated protein 78 binding on HepG2 cells while exhibiting cell translocation activity that was contingent on the length of the poly(arginine) strand. In single dose (0.15 mM) and dose-response (0-1.5 mM) cell viability assays, peptides were found to be nontoxic in human HepG2 liver cancer cells, illustrating their potential as safe cancer-targeting delivery agents.
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Affiliation(s)
- Stesha C Joseph
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange, NJ, 07079, USA
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Maina A, Blackman BA, Parronchi CJ, Morozko E, Bender ME, Blake AD, Sabatino D. Solid-phase synthesis, characterization and RNAi activity of branch and hyperbranch siRNAs. Bioorg Med Chem Lett 2013; 23:5270-4. [DOI: 10.1016/j.bmcl.2013.08.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 07/26/2013] [Accepted: 08/05/2013] [Indexed: 12/20/2022]
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Patel P, Hanawa E, Yadav R, Samuni U, Marzabadi C, Sabatino D. Synthesis, DNA binding and anti-leukemic activity of an aminoacyl nucleolipid. Bioorg Med Chem Lett 2013; 23:5086-90. [DOI: 10.1016/j.bmcl.2013.07.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 07/06/2013] [Accepted: 07/16/2013] [Indexed: 11/17/2022]
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30
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Jamieson AG, Boutard N, Sabatino D, Lubell WD. Peptide scanning for studying structure-activity relationships in drug discovery. Chem Biol Drug Des 2013; 81:148-65. [PMID: 23253136 DOI: 10.1111/cbdd.12042] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Peptide-based therapeutics have grown in importance over the last few decades. Furthermore, peptides have been extensively used as lead compounds in the drug discovery process to investigate the nature of chemical space required for molecular recognition and activity at a variety of targets. This critical commentary reviews scanning techniques, which employ natural and non-proteinogenic amino acids to facilitate understanding of structural requirements for peptide biological activity. The value of sequence analysis by such methods is highlighted by examples, in which the elements for peptide affinity and activity have been elucidated and employed to prepare peptidomimetic leads for drug development.
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Affiliation(s)
- Andrew G Jamieson
- Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK
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31
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Piermattei A, Greco F, Fidanzio A, Azario L, Porcelli A, Cilla S, Sabatino D, Russo A, D'Onofrio G, Russo M. Real-time dose reconstruction for wedged photon beams: a generalized procedure. J Appl Clin Med Phys 2011; 12:3538. [PMID: 22089008 PMCID: PMC5718746 DOI: 10.1120/jacmp.v12i4.3538] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 04/27/2011] [Accepted: 05/09/2011] [Indexed: 12/04/2022] Open
Abstract
A practical and accurate generalized procedure to reconstruct the isocenter dose Diso for 3D conformal radiotherapy (3DCRT) has been developed for X‐ray open beams supplied by linacs of different manufacturers and equipped with aSi electronic portal imaging devices (aSi EPIDs). This paper reports an extension of the method, to be applied at the wedged X‐ray beams characterized by the wedge attenuation factor WAF. Using water‐equivalent solid phantoms (SPs) of different thicknesses, w, and photon square fields of sizes, L, the generalized midplane doses D0(WAF,w/2,L) and generalized transit signals st0(WAF,w,L) by 38 beams of six different linacs were determined. The generalized data were fitted by surface equations and used together with the information of the ‘record & verify’ network of the centers. In this manner, for every beam, the Diso reconstruction was obtained in about 25 seconds after the treatment. To test the in vivo dosimetric procedure, six pelvic treatments that used conformed wedged beams were carried out with three linacs of different manufacturers. For every beam, the comparison between the reconstructed Diso and the Diso,TPS computed by the TPS, resulted in an acceptable tolerance level of ±5%, estimated for this kind of treatment. Generally the in vivo dosimetry methods that use EPIDs require: (i) a special effort for the dosimetric commissioning with SPs of different thicknesses, and (ii) extra time for the analysis of the EPID signals. The proposed procedure simplifies the commissioning step and supplies for Varian, Elekta, and Siemens linacs equipped with the aSi EPIDs a quasi‐real time in vivo dosimetry for open and wedged 3DCRT fields. PACS number: 87.53Xd
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Affiliation(s)
- A Piermattei
- Istituto di Fisica, Università Cattolica del S. Cuore, Rome, Italy.
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Sabatino D, Proulx C, Pohankova P, Ong H, Lubell WD. Structure–Activity Relationships of GHRP-6 Azapeptide Ligands of the CD36 Scavenger Receptor by Solid-Phase Submonomer Azapeptide Synthesis. J Am Chem Soc 2011; 133:12493-506. [DOI: 10.1021/ja203007u] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Sabatino
- Department of Chemistry and Biochemistry, Seton Hall University, 400 South Orange Avenue, South Orange New Jersey 07079, United States
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33
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Deodato F, Cilla S, Macchia G, Massaccesi M, Ippolito E, Digesù C, Bonomo P, Picardi V, Viola P, Sabatino D, craus M, Valentini V, Cellini N, Piermattei A, Morganti A. 869 poster SIMULTANEOUS INTEGRATED BOOST VOLUMETRIC MODULATED ARC THERAPY (SIB-VMAT) IN HEAD AND NECK TUMORS. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70991-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Cilla S, Deodato F, Macchia G, Digesù C, Sabatino D, Massaccesi M, Picardi V, Ferro M, Bonomo P, Caravatta L, Fidanzio A, Piermattei A, Morganti A. 1323 poster ONCENTRA MASTERPLAN VMAT WITH SIMULTANEOUS INTEGRATED BOOST: PLANNING AND EVALUATION FOR DIFFERENT CANCER CASES. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)71445-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Cilla S, Fidanzio A, Greco F, Sabatino D, Russo A, Gargiulo L, Azario L, Piermattei A. Calibration of Elekta aSi EPIDs Used as Transit Dosimeter. Technol Cancer Res Treat 2011; 10:39-48. [DOI: 10.7785/tcrt.2012.500178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The transit in vivo dosimetry performed by the Electronic Portal Imaging Device (EPID), avoids the problem of solid-state detector positioning on the patient. Moreover, the dosimetric characterization of the recent Elekta aSi EPIDs in terms of signal stability and linearity enables these detectors adaptable for the transit in vivo dosimetry with 6, 10 and 15 MV photon beams. However, the implementation of the EPID transit dosimetry requires several measurements. Recently, the present authors have developed an in vivo dosimetry method for the 3D CRT based on correlation functions defined by the ratios between the transit signal, st (w,L), by the EPID and the phantom mid-plane dose, Dm(w,L), at the Source to Axis Distance (SAD) as a function of the phantom thickness, w, and the square field dimensions, L. When the phantom mid-plane was positioned at distance d from the SAD, the ratios st(w,L)/s't(d,w,L), were used to take into account the variation of the scattered photon contributions on the EPID as a function of, d and L. The aim of this paper was the implementation of a procedure that uses generalized correlation functions obtained by nine Elekta Precise linac beams. The procedure can be used by other Elekta Precise linacs equipped with the same aSi EPIDs assuring the stabilities of the beam output factors and the EPID signals. The calibration procedure of the aSi EPID here reported avoids measurements in solid water equivalent phantoms needed to implement the in vivo dosimetry method in the radiotherapy center. A tolerance level ranging between ±5% and ±6% (depending on the type of tumor) was estimated for the comparison between the reconstructed isocenter dose, Diso and the computed dose Diso, TPS by the treatment planning system (TPS).
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Affiliation(s)
- S. Cilla
- U.O di Fisica Sanitaria, Centro di Ricerca e Formazione ad Alta Tecnologia nelle Scienze Biomediche, Università Cattolica del Sacro Cuore, Campobasso, Italy
| | - A. Fidanzio
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168, Rome, Italy
| | - F. Greco
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168, Rome, Italy
| | - D. Sabatino
- U.O di Fisica Sanitaria, Centro di Ricerca e Formazione ad Alta Tecnologia nelle Scienze Biomediche, Università Cattolica del Sacro Cuore, Campobasso, Italy
| | - A. Russo
- U.O. di Radioterapia, Casa di cura Marco Polo USI, Rome, Italy
| | - L. Gargiulo
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168, Rome, Italy
| | - L. Azario
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168, Rome, Italy
| | - A. Piermattei
- U.O di Fisica Sanitaria, Centro di Ricerca e Formazione ad Alta Tecnologia nelle Scienze Biomediche, Università Cattolica del Sacro Cuore, Campobasso, Italy
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168, Rome, Italy
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36
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Bourguet CB, Proulx C, Klocek S, Sabatino D, Lubell WD. Solution-phase submonomer diversification of aza-dipeptide building blocks and their application in aza-peptide and aza-DKP synthesis. J Pept Sci 2010; 16:284-96. [DOI: 10.1002/psc.1235] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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37
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Sabatino D, Proulx C, Klocek S, Bourguet CB, Boeglin D, Ong H, Lubell WD. Exploring Side-Chain Diversity by Submonomer Solid-Phase Aza-Peptide Synthesis. Org Lett 2009; 11:3650-3. [DOI: 10.1021/ol901423c] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Plermattel A, Cilla S, Fldanzlo A, Greco F, Grimaldi L, Sabatino D, Azarlo L, D'Onofrio G. ASI-EPID CALIBRATION FOR A TRANSIT IN-VIVO DOSIMETRY. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72821-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Kassem T, Sabatino D, Jia X, Zhu XX, Lubell WD. To Rink or Not to Rink Amide Link, that is the Question to Address for More Economical and Environmentally Sound Solid-Phase Peptide Synthesis. Int J Pept Res Ther 2009. [DOI: 10.1007/s10989-009-9177-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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40
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Bourguet CB, Dörr A, Godina T, Proulx C, Fridkin G, Jamieson A, Sabatino D, Kassem T, Boutard N, Arsenault J, Ronga L, Brouillette Y, Bednarek M, Tolles JC, Lubell WD. Portraits of the pioneers of the American Peptide Society. Adv Exp Med Biol 2009; 611:xlix-lxix. [PMID: 19400064] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- Carine B Bourguet
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
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41
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Bourguet CB, Sabatino D, Lubell WD. Benzophenone semicarbazone protection strategy for synthesis of aza-glycine containing aza-peptides. Biopolymers 2008; 90:824-31. [DOI: 10.1002/bip.21103] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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42
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Sabatino D, Damha MJ. Synthesis and properties of oligonucleotides containing a 7-membered (oxepane) sugar ring. Nucleosides Nucleotides Nucleic Acids 2008; 26:1185-8. [PMID: 18058562 DOI: 10.1080/15257770701527760] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Herein we describe the synthesis of novel 7-membered ring (oxepane) thymine and adenine nucleosides (oT and oA) and their corresponding 5'-O-phosphoramidite derivatives. Two homopolymeric sequences (oT(15) and oA(15)) were prepared via conventional solid-phase synthesis. The mutually complementary strands had the ability to form a duplex (oT(15):oA(15)) exhibiting a transition temperature of 12 degrees C. The oxepane oligonucleotides were also found to associate with their respective complementary RNA strands thus forming oT(15):rA(15) (13 degrees C) and oA(15):rU(15) (12 degrees C) hybrids. The corresponding native duplexes, namely dT(15):dA(15), dT(15):rA(15) and dA(15):rU(15) had melting temperatures of 37 degrees C, 32 degrees C and 16 degrees C, respectively. The CD spectrum of oT(15):rA(15) closely resembled that of the native dT(15):rA(15) hybrid and, in fact, both were found to be substrates for E. Coli RNase H. Thus the oxepane nucleic acids reported here are one of only a handful of DNA mimics capable of activating RNase H when bound to RNA.
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Affiliation(s)
- David Sabatino
- Department of Chemistry, McGill University, Montreal, Quebec, Canada
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43
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Sabatino D, Damha MJ. Oxepane nucleic acids: synthesis, characterization, and properties of oligonucleotides bearing a seven-membered carbohydrate ring. J Am Chem Soc 2007; 129:8259-70. [PMID: 17559214 DOI: 10.1021/ja071336c] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis and properties of oxepane nucleic acids (ONAs) are described. ONAs are sugar-phosphate oligomers in which the pentofuranose ring of DNA and RNA is replaced with a seven-membered (oxepane) sugar ring. The oxepane nucleoside monomers were prepared from the ring expansion reaction of a cyclopropanated glycal, 1, and their conversion into phosphoramidite derivatives allowed efficient assembly of ONAs on a solid support. ONAs (oT15 and oA15) were found to be much more resistant toward nuclease degradation than natural DNA (dT15 and dA15) in fetal bovine serum (FBS) after 24 h of incubation at 37 degrees C. ONAs also display several attributes in common with the naturally occurring DNA. For example, oT15 exhibited cross-pairing with complementary RNA to give a duplex (oT15/rA15) whose conformation evaluated by CD spectroscopy very closely matched that of the natural DNA/RNA hybrid (dT15/rA15). Furthermore, oT15 was found to elicit Escherichia coli RNase H-mediated degradation of the rA15 strand. When we compared the rates of RNase H-mediated degradation induced by 5- (furanose, dT15), 6- (2'-enopyranose, pT18), and 7-membered (oxepane, oT15) ring oligonucleotides at a temperature that ensures maximum duplex population (10 degrees C), the following trend was observed: dT15 >> oT15 > pT18. The wider implications of these results are discussed in the context of our current understanding of the catalytic mechanism of the enzyme. The homopolymer oT15 also paired with its oxepane complement, oA15, to form a duplex structure that was different [as assessed by circular dichroic (CD) spectroscopy] and of lower thermal stability relative to the native dT15/dA15 hybrid. Hence, ONAs are useful tools for biological studies and provide new insights into the structure and function of natural and alternative genetic systems.
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Affiliation(s)
- David Sabatino
- Contribution from the Department of Chemistry, McGill University, Montreal, Quebec, Canada
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44
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Lackey JG, Sabatino D, Damha MJ. Solid-phase synthesis and on-column deprotection of RNA from 2'- (and 3'-) O-levulinated (Lv) ribonucleoside monomers. Org Lett 2007; 9:789-92. [PMID: 17279762 DOI: 10.1021/ol0629521] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
[reaction: see text] The solid-phase synthesis of oligoribonucleotides derived from ribonucleosides esterified at the 2'- (or 3'-) position with the levulinyl (Lv) group is described. The oligomers can be released from the solid support as 2'-O-Lv ester derivatives or fully deprotected while still attached to the solid support.
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Affiliation(s)
- Jeremy G Lackey
- Department of Chemistry, McGill University, Montreal, QC, Canada
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45
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Manno CS, Arruda VR, Pierce GF, Glader B, Ragni M, Rasko J, Ozelo MC, Hoots K, Blatt P, Konkle B, Dake M, Kaye R, Razavi M, Zajko A, Zehnder J, Nakai H, Chew A, Leonard D, Wright JF, Lessard RR, Sommer JM, Tigges M, Sabatino D, Luk A, Jiang H, Mingozzi F, Couto L, Ertl HC, High KA, Kay MA. Erratum: CORRIGENDUM: Successful transduction of liver in hemophilia by AAV-Factor IX and limitations imposed by the host immune response. Nat Med 2006. [DOI: 10.1038/nm0506-592b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Sabatino D, Kosuri S, Quiles R. Solid and papillary epithelial neoplasm of the pancreas in an 11-year-old girl: case report and literature review. Pediatr Hematol Oncol 2003; 20:357-60. [PMID: 12775532] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
An 11-year-old girl presented with episodic abdominal pain of 2 years' duration. CT scan of the abdomen showed a mass in the tail of the pancreas. A distal pancreatectomy was done and the tumor was excised. Macroscopic and immunohistochemical studies were compatible with a solid and papillary epithelial neoplasm. This is a rare neoplasm with a decidedly female predominance. It has a very low malignant potential with a good prognosis. Surgical removal of the tumor is usually curative.
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Affiliation(s)
- D Sabatino
- Nassau University Medical Center, East Meadow, New York 11554, USA
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47
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Liu YL, Wagner K, Robinson N, Sabatino D, Margaritis P, Xiao W, Herzog RW. Optimized production of high-titer recombinant adeno-associated virus in roller bottles. Biotechniques 2003; 34:184-9. [PMID: 12545558 DOI: 10.2144/03341dd07] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [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: 11/23/2022] Open
Abstract
Adeno-associated viral (AAV) vectors are used for in vivo gene transfer in a number of preclinical models of genetic diseases (including large-animal models) and are currently being tested in clinical trials for treatment of hemophilia B and cystic fibrosis. Protocols for production of AAV vectors in a helper virus-free system are available and are based on transient transfection of HEK-293 cells with multiple plasmids. Scale-up of vector production has been labor intensive and inefficient because of a lack of larger culture vessels suitable for growth of adherent cells, large-scale transfection, and vector production. Here we report efficient production of AAV vector in roller bottles, which represents a 10-fold scale-up from the conventional flask or plate method. Optimized production yielded greater than 10(13) vector genomes per bottle and was as cost effective as published protocols using plates. Successful vector production by this method was dependent on optimization of transfection by calcium phosphate precipitation, of monitoring of cell growth (by measurement of glucose consumption), of cell culture conditions, and CO2/air exchange with the culture vessel.
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Affiliation(s)
- Y L Liu
- Children's Hospital of Philadelphia, Philadelphia, PA, USA
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48
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Abstract
Changes in rehabilitation and clinical practice, the recognition of the role of clients in achieving rehabilitation goals, and client participation in decision-making and administration of service delivery have contributed to the development of new methodologies for research and evaluation. In this paper, the traditional relationship between researchers and subjects in traditional rehabilitation evaluation and research is contrasted with relationships between researchers and clients-consumers in newer methodologies. The limitations and challenges to these models are discussed. Collaborative research, characterized by shared power and non-hierarchical authority between client-consumers and researchers, is described as an alternative model for experimental and evaluative research. Collaborative relationships provide a structure for building upon the knowledge and expertise of each research partner. The authors draw upon their own experience of collaborative research partnerships and models of research partnerships are described. Research developed and conducted in a collaborative partnership can include quantitative and qualitative approaches, maintain traditional scientific perspectives of objectivity, reliability and replicability, and improve participation rates, continuity of involvement for longitudinal studies and utilization of researched methods into practice.
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Affiliation(s)
- K A Liberty
- University of Canterbury, Christchurch, New Zealand
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49
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Abstract
The authors report on 2 children with pernicious anemia, sisters, who presented with hypermelanosis as one of the clinical manifestations. The hypermelanosis disappeared with adequate treatment of vitamin B12 deficiency. Vitamin B12 deficiency should be considered in the differential diagnosis of a child presenting with hyperpigmentation and macrocytic red cell indices.
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Affiliation(s)
- D Sabatino
- Nassau County Medical Center, East Meadow, New York 11554, USA
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Sabatino D. A taste of our quality: our experience with reengineering, developing and introducing new technology, and organizational renewal. Clin Lab Manage Rev 1996; 10:619-28. [PMID: 10164099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
As recipient of the 1995 CLMA Quality Management Award, MDS Ontario Laboratory Division (MDS) has the great opportunity to share with the CLMR readers, through this article, highlights of our change process. These highlights have proven to be valuable learning experiences to us as an organization in health care that has undergone and continues to undergo significant change. In the course of our 5-year journey, MDS has undertaken two main change processes: restructuring and Renewal. Restructuring was a result of financial pressures placed on the organization by our single payer of service, the Ontario Government. Restructuring achieved the required results of reducing the operating expenses of the Ontario Laboratory Division. It was foreseen that one of the greatest challenges at the end of the Restructuring process would be restoring employee morale. The Renewal process began with a leaner, more flexible organization. We needed to address employee morale, and focus the organization on the future and the opportunities that it holds for the employees and the organization. Thus, we began "Building Our Future Together." The key learnings that have enabled us to transform the division successfully are based on the five principles of change: context, communication, commitment, culture, and celebration. These principles have provided the foundation from which our renewed organization will move forward.
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Affiliation(s)
- D Sabatino
- MDS Laboratory Services, Ontario, Canada
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