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Chinnappan R, Makhzoum T, Arai M, Hajja A, Abul Rub F, Alodhaibi I, Alfuwais M, Elahi MA, Alshehri EA, Ramachandran L, Mani NK, Abrahim S, Mir MS, Al-Kattan K, Mir TA, Yaqinuddin A. Recent Advances in Biosensor Technology for Early-Stage Detection of Hepatocellular Carcinoma-Specific Biomarkers: An Overview. Diagnostics (Basel) 2024; 14:1519. [PMID: 39061656 PMCID: PMC11276200 DOI: 10.3390/diagnostics14141519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 07/06/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Hepatocellular carcinoma is currently the most common malignancy of the liver. It typically occurs due to a series of oncogenic mutations that lead to aberrant cell replication. Most commonly, hepatocellular carcinoma (HCC) occurs as a result of pre-occurring liver diseases, such as hepatitis and cirrhosis. Given its aggressive nature and poor prognosis, the early screening and diagnosis of HCC are crucial. However, due to its plethora of underlying risk factors and pathophysiologies, patient presentation often varies in the early stages, with many patients presenting with few, if any, specific symptoms in the early stages. Conventionally, screening and diagnosis are performed through radiological examination, with diagnosis confirmed by biopsy. Imaging modalities tend to be limited by their requirement of large, expensive equipment; time-consuming operation; and a lack of accurate diagnosis, whereas a biopsy's invasive nature makes it unappealing for repetitive use. Recently, biosensors have gained attention for their potential to detect numerous conditions rapidly, cheaply, accurately, and without complex equipment and training. Through their sensing platforms, they aim to detect various biomarkers, such as nucleic acids, proteins, and even whole cells extracted by a liquid biopsy. Numerous biosensors have been developed that may detect HCC in its early stages. We discuss the recent updates in biosensing technology, highlighting its competitive potential compared to conventional methodology and its prospects as a tool for screening and diagnosis.
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Affiliation(s)
- Raja Chinnappan
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
- Tissue/Organ Bioengineering & BioMEMS Laboratory, Organ Transplant Centre of Excellence (TR&I-Dpt), King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia;
| | - Tariq Makhzoum
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
| | - Momo Arai
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
| | - Amro Hajja
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
| | - Farah Abul Rub
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
| | - Ibrahim Alodhaibi
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
| | - Mohammed Alfuwais
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
| | - Muhammad Affan Elahi
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
| | - Eman Abdullah Alshehri
- Tissue/Organ Bioengineering & BioMEMS Laboratory, Organ Transplant Centre of Excellence (TR&I-Dpt), King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia;
| | - Lohit Ramachandran
- Microfluidics, Sensors & Diagnostics (μSenD) Laboratory, Centre for Microfluidics, Biomarkers, Photoceutics and Sensors (μBioPS), Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; (L.R.); (N.K.M.)
| | - Naresh Kumar Mani
- Microfluidics, Sensors & Diagnostics (μSenD) Laboratory, Centre for Microfluidics, Biomarkers, Photoceutics and Sensors (μBioPS), Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; (L.R.); (N.K.M.)
| | - Shugufta Abrahim
- Graduate School of Science and Engineering for Education, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan;
| | - Mohammad Shabab Mir
- School of Pharmacy, Desh Bhagat University, Mandi Gobindgarh 147301, Punjab, India;
| | - Khaled Al-Kattan
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
- Lung Health Centre Department, Organ Transplant Centre of Excellence, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Tanveer Ahmad Mir
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
- Tissue/Organ Bioengineering & BioMEMS Laboratory, Organ Transplant Centre of Excellence (TR&I-Dpt), King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia;
| | - Ahmed Yaqinuddin
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; (T.M.); (M.A.); (A.H.); (F.A.R.); (I.A.); (M.A.); (M.A.E.); (K.A.-K.); (T.A.M.)
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Li M, Yu H, Li Y, Li X, Huang S, Liu X, Weng G, Xu L, Hou T, Guo DS, Wang Y. Rational design of supramolecular self-assembly sensor for living cell imaging of HDAC1 and its application in high-throughput screening. Biosens Bioelectron 2023; 242:115716. [PMID: 37820557 DOI: 10.1016/j.bios.2023.115716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 09/15/2023] [Accepted: 09/28/2023] [Indexed: 10/13/2023]
Abstract
Supramolecular chemistry offers new insights in bioimaging, but specific tracking of enzyme in living cells via supramolecular host-guest reporter pair remains challenging, largely due to the interference caused by the complex cellular environment on the binding between analytes and hosts. Here, by exploiting the principle of supramolecular tandem assay (STA) and the classic host-guest reporter pair (p-sulfonatocalix[4]arene (SC4A) and lucigenin (LCG)) and rationally designing artificial peptide library to screen sequence with high affinity of the target enzyme, we developed a "turn-on" fluorescent sensing system for intracellular imaging of histone deacetylase 1 (HDAC1), which is a potential therapeutic target for various diseases, including cancer, neurological, and cardiovascular diseases. Based on computational simulations and experimental validations, we verified that the deacetylated peptide by HDAC1 competed LCG, freeing it from the SC4A causing fluorescence increase. Enzyme kinetics experiments were further conducted to prove that this assay could detect HDAC1 specifically with high sensitivity (the LOD value is 0.015 μg/mL, ten times lower than the published method). This system was further applied for high-throughput screening of HDAC1 inhibitors over a natural compound library containing 147 compounds, resulting in the identification of a novel HDAC1 down-regulator (Ginsenoside RK3). Our results demonstrated the sensitivity and robustness of the assay system towards HDAC1. It should serve as a valuable tool for biochemical studies and drug screening.
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Affiliation(s)
- Min Li
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Huijuan Yu
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China; State Key Laboratory of Component-based Chinese Medicine, Tianjin Key Laboratory of TCM Chemistry and Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Yiran Li
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xin Li
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Shiqing Huang
- Fluorescence Research Group, Singapore University of Technology and Design, 8 Somapah Road 487372, Singapore
| | - Xiaogang Liu
- Fluorescence Research Group, Singapore University of Technology and Design, 8 Somapah Road 487372, Singapore
| | - Gaoqi Weng
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lei Xu
- Institute of Bioinformatics and Medical Engineering, School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou 213001, China
| | - Tingjun Hou
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Dong-Sheng Guo
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China
| | - Yi Wang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; State Key Laboratory of Component-based Chinese Medicine, Tianjin Key Laboratory of TCM Chemistry and Analysis, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China; Future Health Laboratory Innovation Center of Yangtze River Delta Zhejiang University, Jiaxing 314100, China.
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Boni C, Bonifacio M, Vezzalini M, Scaffidi L, Tomasello L, Parker LL, Boscarino D, Paladin D, Krampera M, Sorio C. Successful Preservation of Native BCR::ABL1 in Chronic Myeloid Leukemia Primary Leukocytes Reveals a Reduced Kinase Activity. Front Oncol 2022; 12:904510. [PMID: 35756686 PMCID: PMC9216732 DOI: 10.3389/fonc.2022.904510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 04/19/2022] [Indexed: 11/25/2022] Open
Abstract
Chronic myeloid leukemia (CML) is a myeloproliferative disease caused by the acquisition of t(9;22) generating the fusion tyrosine kinase BCR::ABL1. However, despite the crucial role of this protein in the dysregulation of numerous signal transduction pathways, a direct measure of BCR::ABL1 kinase activity in chronic phase (CP) CML was never accomplished due to intense degradative activity present in mature leukocytes. Therefore, we developed a procedure suitable to preserve BCR::ABL1 protein under non-denaturing, neutral pH conditions in primary, chronic phase (CP)-CML samples. As a result, specific kinase activity was detected utilizing a biotinylated peptide substrate highly selective for c-ABL1. Furthermore, through this approach, BCR::ABL1 kinase activity was barely detectable in CP-CML compared to Ph+ acute lymphoblastic leukemia primary samples, where kinase activity is comparable to those measured in Ph+ cell lines. These in vitro findings provide the first direct measure of BCR::ABL1 kinase activity in primary CP-CML and reveal the presence of a still uncharacterized inhibitory mechanism that maintains BCR::ABL1 in a low activity state in CP-CML despite its overexpression.
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Affiliation(s)
- Christian Boni
- Department of Medicine, General Pathology Section, University of Verona, Verona, Italy
| | | | - Marzia Vezzalini
- Department of Medicine, General Pathology Section, University of Verona, Verona, Italy
| | - Luigi Scaffidi
- Department of Medicine, Hematology Section, University of Verona, Verona, Italy
| | - Luisa Tomasello
- Department of Medicine, General Pathology Section, University of Verona, Verona, Italy
| | - Laurie L Parker
- Department of Biochemistry, Molecular Biology and Biophysics, Masonic Cancer Center, University of Minnesota, Minneapolis, United States
| | | | | | - Mauro Krampera
- Department of Medicine, Hematology Section, University of Verona, Verona, Italy
| | - Claudio Sorio
- Department of Medicine, General Pathology Section, University of Verona, Verona, Italy
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Montecchini O, Braidotti S, Franca R, Zudeh G, Boni C, Sorio C, Toffoletti E, Rabusin M, Tommasini A, Decorti G, Stocco G. A Novel ELISA-Based Peptide Biosensor Assay for Screening ABL1 Activity in vitro: A Challenge for Precision Therapy in BCR-ABL1 and BCR-ABL1 Like Leukemias. Front Pharmacol 2021; 12:749361. [PMID: 34867354 PMCID: PMC8640483 DOI: 10.3389/fphar.2021.749361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/08/2021] [Indexed: 11/13/2022] Open
Abstract
The pathogenic role of the overactivated ABL1 tyrosine kinase (TK) pathway is well recognized in some forms of BCR-ABL1 like acute lymphoblastic leukemia (ALL); TK inhibitors represent a useful therapeutic choice in these patients who respond poorly to conventional chemotherapy. Here we report a novel peptide biosensor (PABL)-ELISA assay to investigate ABL1 activity in four immortalized leukemic cell lines with different genetic background. The PABL sequence comprises an ABL1 tyrosine (Y) phosphorylation site and a targeting sequence that increases the specificity for ABL1; additional peptides (Y-site-mutated (PABL-F) and fully-phosphorylated (PPHOSPHO-ABL) biosensors) were included in the assay. After incubation with whole cell lysates, average PABL phosphorylation was significantly increased (basal vs. PABL phosphorylation: 6.84 ± 1.46% vs. 32.44 ± 3.25%, p-value < 0.0001, two-way ANOVA, Bonferroni post-test, percentages relative to PPHOSPHO-ABL in each cell line). Cell lines expressing ABL1-chimeric proteins (K562, ALL-SIL) presented the higher TK activity on PABL; a lower signal was instead observed for NALM6 and REH (p < 0.001 and p < 0.05 vs. K562, respectively). Phosphorylation was ABL1-mediated, as demonstrated by the specific inhibition of imatinib (p < 0.001 for K562, NALM6, ALL-SIL and p < 0.01 for REH) in contrast to ruxolitinib (JAK2-inhibitor), and occurred on the ABL1 Y-site, as demonstrated by PABL-F whose phosphorylation was comparable to basal levels. In order to validate this novel PABL-ELISA assay on leukemic cells isolated from patient’s bone marrow aspirates, preliminary analysis on blasts derived from an adult affected by chronic myeloid leukaemia (BCR-ABL1 positive) and a child affected by ALL (BCR-ABL1 negative) were performed. Phosphorylation of PABL was specifically inhibited after the incubation of BCR-ABL1 positive cell lysates with imatinib, but not with ruxolitinib. While requiring further optimization and validation in leukemic blasts to be of clinical interest, the PABL-based ELISA assay provides a novel in vitro tool for screening both the aberrant ABL1 activity in BCR-ABL1 like ALL leukemic cells and their potential response to TK inhibitors.
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Affiliation(s)
- Oksana Montecchini
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Stefania Braidotti
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Raffaella Franca
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Giulia Zudeh
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Christian Boni
- Department of Medicine, University of Verona, Verona, Italy
| | - Claudio Sorio
- Department of Medicine, University of Verona, Verona, Italy
| | - Eleonora Toffoletti
- Division of Hematology and Bone Marrow Transplantation, Azienda Ospedaliero-Universitaria, Udine, Italy
| | - Marco Rabusin
- Institute for Maternal and Child Health (I.R.C.C.S) Burlo Garofolo, Trieste, Italy
| | - Alberto Tommasini
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy.,Institute for Maternal and Child Health (I.R.C.C.S) Burlo Garofolo, Trieste, Italy
| | - Giuliana Decorti
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy.,Institute for Maternal and Child Health (I.R.C.C.S) Burlo Garofolo, Trieste, Italy
| | - Gabriele Stocco
- Department of Life Sciences, University of Trieste, Trieste, Italy
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Izzo B, Gottardi EM, Errichiello S, Daraio F, Baratè C, Galimberti S. Monitoring Chronic Myeloid Leukemia: How Molecular Tools May Drive Therapeutic Approaches. Front Oncol 2019; 9:833. [PMID: 31555590 PMCID: PMC6742705 DOI: 10.3389/fonc.2019.00833] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 08/13/2019] [Indexed: 12/25/2022] Open
Abstract
More than 15 years ago, imatinib entered into the clinical practice as a "magic bullet"; from that point on, the prognosis of patients affected by chronic myeloid leukemia (CML) became comparable to that of aged-matched healthy subjects. The aims of treatment with tyrosine kinase inhibitors (TKIs) are for complete hematological response after 3 months of treatment, complete cytogenetic response after 6 months, and a reduction of the molecular disease of at least 3 logs after 12 months. Patients who do not reach their goal can switch to another TKI. Thus, the molecular monitoring of response is the main consideration of management of CML patients. Moreover, cases in deep and persistent molecular response can tempt the physician to interrupt treatment, and this "dream" is possible due to the quantitative PCR. After great international effort, today the BCR-ABL1 expression obtained in each laboratory is standardized and expressed as "international scale." This aim has been reached after the establishment of the EUTOS program (in Europe) and the LabNet network (in Italy), the platforms where biologists meet clinicians. In the field of quantitative PCR, the digital PCR is now a new and promising, sensitive and accurate tool. Some authors reported that digital PCR is able to better classify patients in precise "molecular classes," which could lead to a better identification of those cases that will benefit from the interruption of therapy. In addition, digital PCR can be used to identify a point mutation in the ABL1 domain, mutations that are often responsible for the TKI resistance. In the field of resistance, a prominent role is played by the NGS that enables identification of any mutation in ABL1 domain, even at sub-clonal levels. This manuscript reviews how the molecular tools can lead the management of CML patients, focusing on the more recent technical advances.
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Affiliation(s)
- Barbara Izzo
- Department of Clinical Medicine and Surgery, Molecular Biology, University Federico II, Naples, Italy
| | | | - Santa Errichiello
- Department of Clinical Medicine and Surgery, Molecular Biology, University Federico II, Naples, Italy
| | - Filomena Daraio
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
| | - Claudia Baratè
- Section of Hematology, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Sara Galimberti
- Section of Hematology, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
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Application of a Substrate-Mediated Selection with c-Src Tyrosine Kinase to a DNA-Encoded Chemical Library. Molecules 2019; 24:molecules24152764. [PMID: 31366048 PMCID: PMC6695731 DOI: 10.3390/molecules24152764] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/23/2019] [Accepted: 07/26/2019] [Indexed: 12/14/2022] Open
Abstract
As aberrant activity of protein kinases is observed in many disease states, these enzymes are common targets for therapeutics and detection of activity levels. The development of non-natural protein kinase substrates offers an approach to protein substrate competitive inhibitors, a class of kinase inhibitors with promise for improved specificity. Also, kinase activity detection approaches would benefit from substrates with improved activity and specificity. Here, we apply a substrate-mediated selection to a peptidomimetic DNA-encoded chemical library for enrichment of molecules that can be phosphorylated by the protein tyrosine kinase, c-Src. Several substrates were identified and characterized for activity. A lead compound (SrcDEL10) showed both the ability to serve as a substrate and to promote ATP hydrolysis by the kinase. In inhibition assays, compounds displayed IC50's ranging from of 8-100 µM. NMR analysis of SrcDEL10 bound to the c-Src:ATP complex was conducted to characterize the binding mode. An ester derivative of the lead compound demonstrated cellular activity with inhibition of Src-dependent signaling in cell culture. Together, the results show the potential for substrate-mediated selections of DNA-encoded libraries to discover molecules with functions other than simple protein binding and offer a new discovery method for development of synthetic tyrosine kinase substrates.
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7
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Kruk M, Widstrom N, Jena S, Wolter NL, Blankenhorn JF, Abdalla I, Yang TY, Parker LL. Assays for tyrosine phosphorylation in human cells. Methods Enzymol 2019; 626:375-406. [PMID: 31606083 DOI: 10.1016/bs.mie.2019.06.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Tyrosine kinases are important for many cellular processes and disruption of their regulation is a factor in diseases like cancer, therefore they are a major target of anticancer drugs. There are many ways to measure tyrosine kinase activity in cells by monitoring endogenous substrate phosphorylation, or by using peptide substrates and incubating them with cell lysates containing active kinases. However, most of these strategies rely on antibodies and/or are limited in how accurately they model the intracellular environment. In cases in which activity needs to be measured in cells, but endogenous substrates are not known and/or suitable phosphospecific antibodies are not available, cell-deliverable peptide substrates can be an alternative and can provide information on activation and inhibition of kinases in intact, live cells. In this chapter, we review this methodology and provide a protocol for measuring Abl kinase activity in human cells using enzyme-linked immunosorbent assay (ELISA) with a generic antiphosphotyrosine antibody for detection.
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Affiliation(s)
- Monica Kruk
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States
| | - Naomi Widstrom
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States
| | - Sampreeti Jena
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States
| | - Nicole L Wolter
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States
| | - John F Blankenhorn
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States
| | - Ibrahim Abdalla
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States
| | - Tzu-Yi Yang
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States
| | - Laurie L Parker
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, United States.
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8
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He S, Kyaw YME, Tan EKM, Bekale L, Kang MWC, Kim SSY, Tan I, Lam KP, Kah JCY. Quantitative and Label-Free Detection of Protein Kinase A Activity Based on Surface-Enhanced Raman Spectroscopy with Gold Nanostars. Anal Chem 2018; 90:6071-6080. [PMID: 29697974 DOI: 10.1021/acs.analchem.7b05417] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The activity of extracellular protein kinase A (PKA) is known to be a biomarker for cancer. However, conventional PKA assays based on colorimetric, radioactive, and fluorometric techniques suffer from intensive labeling-related preparations, background interference, photobleaching, and safety concerns. While surface-enhanced Raman spectroscopy (SERS)-based assays have been developed for various enzymes to address these limitations, their use in probing PKA activity is limited due to subtle changes in the Raman spectrum with phosphorylation. Here, we developed a robust colloidal SERS-based scheme for label-free quantitative measurement of PKA activity using gold nanostars (AuNS) as a SERS substrate functionalized with bovine serum albumin (BSA)-kemptide (Kem) bioconjugate (AuNS-BSA-Kem), where BSA conferred colloidal stability and Kem is a high-affinity peptide substrate for PKA. By performing principle component analysis (PCA) on the SERS spectrum, we identified two Raman peaks at 725 and 1395 cm-1, whose ratiometric intensity change provided a quantitative measure of Kem phosphorylation by PKA in vitro and allowed us to distinguish MDA-MB-231 and MCF-7 breast cancer cells known to overexpress extracellular PKA catalytic subunits from noncancerous human umbilical vein endothelial cells (HUVEC) based on their PKA activity in cell culture supernatant. The outcome demonstrated potential application of AuNS-BSA-Kem as a SERS probe for cancer screening based on PKA activity.
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Affiliation(s)
- Shuai He
- Department of Biomedical Engineering , National University of Singapore , Singapore 117583
| | - Yi Mon Ei Kyaw
- Department of Biomedical Engineering , National University of Singapore , Singapore 117583
| | | | - Laurent Bekale
- Department of Biomedical Engineering , National University of Singapore , Singapore 117583
| | - Malvin Wei Cherng Kang
- Department of Biomedical Engineering , National University of Singapore , Singapore 117583
| | - Susana Soo-Yeon Kim
- Bioprocessing Technology Institute, Agency for Science, Technology and Research , Singapore 138668
| | - Ivan Tan
- Bioprocessing Technology Institute, Agency for Science, Technology and Research , Singapore 138668
| | - Kong-Peng Lam
- Bioprocessing Technology Institute, Agency for Science, Technology and Research , Singapore 138668
| | - James Chen Yong Kah
- Department of Biomedical Engineering , National University of Singapore , Singapore 117583.,NUS Graduate School for Integrative Sciences and Engineering , National University of Singapore , Singapore 117456
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Ahmed M, Carrascosa LG, Ibn Sina AA, Zarate EM, Korbie D, Ru KL, Shiddiky MJ, Mainwaring P, Trau M. Detection of aberrant protein phosphorylation in cancer using direct gold-protein affinity interactions. Biosens Bioelectron 2017; 91:8-14. [DOI: 10.1016/j.bios.2016.12.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 11/27/2016] [Accepted: 12/06/2016] [Indexed: 01/06/2023]
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10
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Ouellette SB, Noel BM, Parker LL. A Cell-Based Assay for Measuring Endogenous BcrAbl Kinase Activity and Inhibitor Resistance. PLoS One 2016; 11:e0161748. [PMID: 27598410 PMCID: PMC5012566 DOI: 10.1371/journal.pone.0161748] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 08/08/2016] [Indexed: 12/27/2022] Open
Abstract
Kinase enzymes are an important class of drug targets, particularly in cancer. Cell-based kinase assays are needed to understand how potential kinase inhibitors act on their targets in a physiologically relevant context. Current cell-based kinase assays rely on antibody-based detection of endogenous substrates, inaccurate disease models, or indirect measurements of drug action. Here we expand on previous work from our lab to introduce a 96-well plate compatible approach for measuring cell-based kinase activity in disease-relevant human chronic myeloid leukemia cell lines using an exogenously added, multi-functional peptide substrate. Our cellular models natively express the BcrAbl oncogene and are either sensitive or have acquired resistance to well-characterized BcrAbl tyrosine kinase inhibitors. This approach measures IC50 values comparable to established methods of assessing drug potency, and its robustness indicates that it can be employed in drug discovery applications. This medium-throughput assay could bridge the gap between single target focused, high-throughput in vitro assays and lower-throughput cell-based follow-up experiments.
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MESH Headings
- Cell Line, Tumor
- Drug Discovery
- Gene Expression Regulation, Leukemic/drug effects
- Genes, abl/genetics
- Humans
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Peptides/metabolism
- Peptides/pharmacology
- Phosphorylation
- Protein Kinase Inhibitors/pharmacology
- Substrate Specificity
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Affiliation(s)
- Steven B. Ouellette
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue Center for Cancer Research, Purdue University, West Lafayette, Indiana, United States of America
- * E-mail: (SO); (LP)
| | - Brett M. Noel
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue Center for Cancer Research, Purdue University, West Lafayette, Indiana, United States of America
| | - Laurie L. Parker
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue Center for Cancer Research, Purdue University, West Lafayette, Indiana, United States of America
- * E-mail: (SO); (LP)
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11
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Abstract
Phosphorylation of substrate proteins by protein kinases can lead to activation or inactivation of signaling pathways or metabolic processes. Precise understanding of activity and specificity of protein kinases are important questions in characterization of kinase functions. Here, we describe a procedure to study kinase activity and specificity using kinase-GFP complexes purified from plant material and synthetic peptides as substrates. Magnetic GFP beads allow purifying receptor-like kinase-GFP complexes from microsomal fractions. Kinase-GFP complexes are then incubated with ATP and the synthetic peptides for kinase reaction. Phosphorylation of substrate peptides is then identified and quantified by mass spectrometry.
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Affiliation(s)
- Xu Na Wu
- Department of Plant Systems Biology, Universität Hohenheim, Fruwirthstraße 12, Stuttgart, 70593, Germany
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12
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Witucki LA, Borowicz LS, Pedley AM, Curtis-Fisk J, Kuszpit EG. Identification of FAK substrate peptides via colorimetric screening of a one-bead one-peptide combinatorial library. J Pept Sci 2015; 21:302-11. [PMID: 25728406 DOI: 10.1002/psc.2751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 12/19/2014] [Accepted: 12/30/2014] [Indexed: 11/09/2022]
Abstract
Focal adhesion kinase (FAK) is a protein tyrosine kinase that is associated with regulating cellular functions such as cell adhesion and migration and has emerged as an important target for cancer research. Short peptide substrates that are selectively and efficiently phosphorylated by FAK have not been previously identified and tested. Here we report the synthesis and screening of a one-bead one-peptide combinatorial library to identify novel substrates for FAK. Using a solid-phase colorimetric antibody tagging detection platform, the peptide beads phosphorylated by FAK were sequenced via Edman degradation and then validated through radioisotope kinetic studies with [γ-(32)P] ATP to derive Michaelis-Menton constants. The combination of results gathered from both colorimetric and radioisotope kinase assays led to the rational design of a second generation of FAK peptide substrates. Out of all the potential peptide substrates evaluated, the most active was GDYVEFKKK with a K(M) = 92 μM and a Vmax = 1920 nmol/min/mg. Peptide substrates discovered within this study may be useful diagnostic tools for future kinase investigations and may lead to novel therapeutic agents.
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Affiliation(s)
- Laurie A Witucki
- Department of Chemistry, Grand Valley State University, Allendale, MI, 49401, USA
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13
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Lipchik AM, Perez M, Bolton S, Dumrongprechachan V, Ouellette SB, Cui W, Parker LL. KINATEST-ID: a pipeline to develop phosphorylation-dependent terbium sensitizing kinase assays. J Am Chem Soc 2015; 137:2484-94. [PMID: 25689372 DOI: 10.1021/ja507164a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Nonreceptor protein tyrosine kinases (NRTKs) are essential for cellular homeostasis and thus are a major focus of current drug discovery efforts. Peptide substrates that can enhance lanthanide ion luminescence upon tyrosine phosphorylation enable rapid, sensitive screening of kinase activity, however design of suitable substrates that can distinguish between tyrosine kinase families is a huge challenge. Despite their different substrate preferences, many NRTKs are structurally similar even between families. Furthermore, the development of lanthanide-based kinase assays is hampered by incomplete understanding of how to integrate sequence selectivity with metal ion binding, necessitating laborious iterative substrate optimization. We used curated proteomic data from endogenous kinase substrates and known Tb(3+)-binding sequences to build a generalizable in silico pipeline with tools to generate, screen, align, and select potential phosphorylation-dependent Tb(3+)-sensitizing substrates that are most likely to be kinase specific. We demonstrated the approach by developing several substrates that are selective within kinase families and amenable to high-throughput screening (HTS) applications. Overall, this strategy represents a pipeline for developing efficient and specific assays for virtually any tyrosine kinase that use HTS-compatible lanthanide-based detection. The tools provided in the pipeline also have the potential to be adapted to identify peptides for other purposes, including other enzyme assays or protein-binding ligands.
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Affiliation(s)
- Andrew M Lipchik
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Center for Cancer Research, Purdue University , West Lafayette, Indiana 47907
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14
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Liu Q, Wang J, Boyd BJ. Peptide-based biosensors. Talanta 2015; 136:114-27. [PMID: 25702993 DOI: 10.1016/j.talanta.2014.12.020] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 11/26/2014] [Accepted: 12/18/2014] [Indexed: 12/24/2022]
Abstract
Peptides have been used as components in biological analysis and fabrication of novel biosensors for a number of reasons, including mature synthesis protocols, diverse structures and as highly selective substrates for enzymes. Bio-conjugation strategies can provide an efficient way to convert interaction information between peptides and analytes into a measurable signal, which can be used for fabrication of novel peptide-based biosensors. Many sensitive fluorophores can respond rapidly to environmental changes and stimuli manifest as a change in spectral characteristics, hence environmentally-sensitive fluorophores have been widely used as signal markers to conjugate to peptides to construct peptide-based molecular sensors. Additionally, nanoparticles, fluorescent polymers, graphene and near infrared dyes are also used as peptide-conjugated signal markers. On the other hand, peptides may play a generalist role in peptide-based biosensors. Peptides have been utilized as bio-recognition elements to bind various analytes including proteins, nucleic acid, bacteria, metal ions, enzymes and antibodies in biosensors. The selectivity of peptides as an enzymatic substrate has thus been utilized to construct enzyme sensors or enzyme-activity sensors. In addition, progress on immobilization and microarray techniques of peptides has facilitated the progress and commercial application of chip-based peptide biosensors in clinical diagnosis.
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Affiliation(s)
- Qingtao Liu
- Drug Delivery Disposition and Dynamics-Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville 3052, VIC, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville 3052, VIC, Australia
| | - Jinfeng Wang
- Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong 3217, VIC, Australia
| | - Ben J Boyd
- Drug Delivery Disposition and Dynamics-Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville 3052, VIC, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville 3052, VIC, Australia.
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15
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Deng Y, Alicea-Velázquez NL, Bannwarth L, Lehtonen SI, Boggon TJ, Cheng HC, Hytönen VP, Turk BE. Global analysis of human nonreceptor tyrosine kinase specificity using high-density peptide microarrays. J Proteome Res 2014; 13:4339-46. [PMID: 25164267 PMCID: PMC4184454 DOI: 10.1021/pr500503q] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
![]()
Protein
kinases phosphorylate substrates in the context of specific
phosphorylation site sequence motifs. The knowledge of the specific
sequences that are recognized by kinases is useful for mapping sites
of phosphorylation in protein substrates and facilitates the generation
of model substrates to monitor kinase activity. Here, we have adapted
a positional scanning peptide library method to a microarray format
that is suitable for the rapid determination of phosphorylation site
motifs for tyrosine kinases. Peptide mixtures were immobilized on
glass slides through a layer of a tyrosine-free Y33F mutant avidin
to facilitate the analysis of phosphorylation by radiolabel assay.
A microarray analysis provided qualitatively similar results in comparison
with the solution phase peptide library “macroarray”
method. However, much smaller quantities of kinases were required
to phosphorylate peptides on the microarrays, which thus enabled a
proteome scale analysis of kinase specificity. We illustrated this
capability by microarray profiling more than 80% of the human nonreceptor
tyrosine kinases (NRTKs). Microarray results were used to generate
a universal NRTK substrate set of 11 consensus peptides for in vitro
kinase assays. Several substrates were highly specific for their cognate
kinases, which should facilitate their incorporation into kinase-selective
biosensors.
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Affiliation(s)
- Yang Deng
- Department of Pharmacology, Yale University School of Medicine , New Haven, Connecticut 06520, United States
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16
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Damayanti NP, Parker LL, Irudayaraj JMK. Fluorescence lifetime imaging of biosensor peptide phosphorylation in single live cells. Angew Chem Int Ed Engl 2013; 52:3931-4. [PMID: 23450802 DOI: 10.1002/anie.201209303] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 01/12/2013] [Indexed: 12/12/2022]
Affiliation(s)
- Nur P Damayanti
- Department of Agricultural and Biological Engineering, Bindley Bioscience Center, Purdue Center for Cancer Research, Purdue University, 225 S. University Street, West Lafayette, IN 47907, USA
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17
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Damayanti NP, Parker LL, Irudayaraj JMK. Fluorescence Lifetime Imaging of Biosensor Peptide Phosphorylation in Single Live Cells. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209303] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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A multiple reaction monitoring (MRM) method to detect Bcr-Abl kinase activity in CML using a peptide biosensor. PLoS One 2013; 8:e56627. [PMID: 23437189 PMCID: PMC3577862 DOI: 10.1371/journal.pone.0056627] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 01/14/2013] [Indexed: 11/19/2022] Open
Abstract
The protein kinase Bcr-Abl plays a major role in the pathogenesis of chronic myelogenous leukemia (CML), and is the target of the breakthrough drug imatinib (Gleevec™). While most patients respond well to imatinib, approximately 30% never achieve remission or develop resistance within 1–5 years of starting imatinib treatment. Evidence from clinical studies suggests that achieving at least 50% inhibition of a patient’s Bcr-Abl kinase activity (relative to their level at diagnosis) is associated with improved patient outcomes, including reduced occurrence of resistance and longer maintenance of remission. Accordingly, sensitive assays for detecting Bcr-Abl kinase activity compatible with small amounts of patient material are desirable as potential companion diagnostics for imatinib. Here we report the detection of Bcr-Abl activity and inhibition by imatinib in the human CML cell line K562 using a cell-penetrating peptide biosensor and multiple reaction monitoring (MRM) on a triple quadrupole mass spectrometer. MRM enabled reproducible, selective detection of the peptide biosensor at fmol levels from aliquots of cell lysate equivalent to ∼15,000 cells. This degree of sensitivity will facilitate the miniaturization of the entire assay procedure down to cell numbers approaching 15,000, making it practical for translational applications in patient cells in which the limited amount of available patient material often presents a major challenge.
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19
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Lipchik AM, Parker LL. Time-resolved luminescence detection of spleen tyrosine kinase activity through terbium sensitization. Anal Chem 2013; 85:2582-8. [PMID: 23414415 DOI: 10.1021/ac3023422] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Disruption of regulatory protein phosphorylation can lead to disease and is particularly prevalent in cancers. Inhibitors that target deregulated kinases are therefore a major focus of chemotherapeutic development. Achieving sensitivity and specificity in high-throughput compatible kinase assays is key to successful inhibitor development. Here, we describe the application of time-resolved luminescence detection to the direct sensing of spleen tyrosine kinase (Syk) activity and inhibition using a novel peptide substrate. Chelation and luminescence sensitization of Tb(3+) allowed the direct detection of peptide phosphorylation without any antibodies or other labeling reagents. Characterizing the Tb(3+) coordination properties of the phosphorylated vs unphosphorylated form of the peptide revealed that an inner-sphere water was displaced upon phosphorylation, which likely was responsible for both enhancing the luminescence intensity and also extending the lifetime, which enabled gating of the luminescence signal to improve the dynamic range. Furthermore, a shift in the optimal absorbance maximum for excitation was observed, from 275 nm (for the unphosphorylated tyrosine peptide) to 266 nm (for the phosphorylated tyrosine peptide). Accordingly, time-resolved measurements with excitation at 266 nm via a monochromator enabled a 16-fold improvement in base signal-to-noise for distinguishing phosphopeptide from unphosphorylated peptide. This led to a high degree of sensitivity and quantitative reproducibility, demonstrating the amenability of this method to both research laboratory and high-throughput applications.
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Affiliation(s)
- Andrew M Lipchik
- Department of Medicinal Chemistry and Molecular Pharmacology and Purdue Center for Cancer Research, Purdue University, 201 S. University Street, West Lafayette, Indiana 47907, United States
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20
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Deng Y, Couch BA, Koleske AJ, Turk BE. A peptide photoaffinity probe specific for the active conformation of the Abl tyrosine kinase. Chembiochem 2012; 13:2510-2. [PMID: 23081945 DOI: 10.1002/cbic.201200560] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Yang Deng
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, USA
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21
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Lipchik AM, Killins RL, Geahlen RL, Parker LL. A peptide-based biosensor assay to detect intracellular Syk kinase activation and inhibition. Biochemistry 2012; 51:7515-24. [PMID: 22920457 DOI: 10.1021/bi300970h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Spleen tyrosine kinase (Syk) has been implicated in a number of pathologies including cancer and rheumatoid arthritis and thus has been pursued as a novel therapeutic target. Because of the complex relationship between Syk's auto- and other internal phosphorylation sites, scaffolding proteins, enzymatic activation state and sites of phosphorylation on its known substrates, the role of Syk's activity in these diseases has not been completely clear. To approach such analyses, we developed a Syk-specific artificial peptide biosensor (SAStide) to use in a cell-based assay for direct detection of intracellular Syk activity and inhibition in response to physiologically relevant stimuli in both laboratory cell lines and primary splenic B cells. This peptide contains a sequence derived from known Syk substrate preference motifs linked to a cell permeable peptide, resulting in a biosensor that is phosphorylated in live cells in a Syk-dependent manner, thus serving as a reporter of Syk catalytic activity in intact cells. Because the assay is compatible with live, primary cells and can report pharmacodynamics for drug action on an intended target, this methodology could be used to facilitate a better understanding of Syk's function and the effect of its inhibition in disease.
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Affiliation(s)
- Andrew M Lipchik
- Department of Medicinal Chemistry and Molecular Pharmacology and Purdue Center for Cancer Research, Purdue University, West Lafayette, IN 47907, USA
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22
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Baccile JA, Morrell MA, Falotico RM, Milliken BT, Drew DL, Rossi FM. Modular synthesis of photocleavable peptides using click chemistry. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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23
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Tang J, Wang JY, Parker LL. Detection of early Abl kinase activation after ionizing radiation by using a peptide biosensor. Chembiochem 2012; 13:665-73. [PMID: 22334513 PMCID: PMC3429332 DOI: 10.1002/cbic.201100763] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Indexed: 12/15/2022]
Abstract
The ubiquitously expressed Abl protein is a non-receptor tyrosine kinase that undergoes nuclear-cytoplasmic shuttling and is involved in many signaling pathways in the cell. Nuclear Abl is activated by DNA damage to regulate DNA repair, cell-cycle checkpoints and apoptosis. Previous studies have established that ataxia telangiectasia mutated (ATM) activates nuclear Abl by phosphorylating serine 465 (S465) in the kinase domain in response to ionizing radiation (IR). Using a peptide biosensor that specifically reports on the Abl kinase activity, we found that an Abl-S465A mutant, which is not capable of being activated by ATM through the canonical site, was still activated rapidly after IR. We established that DNA-dependent protein kinase (DNAPK) is likely to be responsible for a second pathway to activate Abl early on in the response to IR through phosphorylation at a site other than S465. Our findings show that nuclear and cytoplasmic Abl kinase is activated early on (within 5 min) in response to IR by both ATM and DNAPK, and that although one or the other of these kinases is required, either one is sufficient to activate Abl. These results support the concept of early Abl recruitment by both the ATM and the DNAPK pathways to regulate nuclear events triggered by DNA damage and potentially communicate them to proteins in the cytoplasm.
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Affiliation(s)
- Jiabin Tang
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Center for Cancer Research, Purdue University, West Lafayette, IN 47907, Fax: (+001) 765-496-1496
| | - Jean Y. Wang
- Department of Medicine and Division of Hematology-Oncology, Moores Cancer Center, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093
| | - Laurie L. Parker
- Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Center for Cancer Research, Purdue University, West Lafayette, IN 47907, Fax: (+001) 765-496-1496
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24
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Bremmer SC, Hall H, Martinez JS, Eissler CL, Hinrichsen TH, Rossie S, Parker LL, Hall MC, Charbonneau H. Cdc14 phosphatases preferentially dephosphorylate a subset of cyclin-dependent kinase (Cdk) sites containing phosphoserine. J Biol Chem 2011; 287:1662-9. [PMID: 22117071 DOI: 10.1074/jbc.m111.281105] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Mitotic cell division is controlled by cyclin-dependent kinases (Cdks), which phosphorylate hundreds of protein substrates responsible for executing the division program. Cdk inactivation and reversal of Cdk-catalyzed phosphorylation are universal requirements for completing and exiting mitosis and resetting the cell cycle machinery. Mechanisms that define the timing and order of Cdk substrate dephosphorylation remain poorly understood. Cdc14 phosphatases have been implicated in Cdk inactivation and are thought to be generally specific for Cdk-type phosphorylation sites. We show that budding yeast Cdc14 possesses a strong and unusual preference for phosphoserine over phosphothreonine at Pro-directed sites in vitro. Using serine to threonine substitutions in the Cdk consensus sites of the Cdc14 substrate Acm1, we demonstrate that phosphoserine specificity exists in vivo. Furthermore, it appears to be a conserved property of all Cdc14 family phosphatases. An invariant active site residue was identified that sterically restricts phosphothreonine binding and is largely responsible for phosphoserine selectivity. Optimal Cdc14 substrates also possessed a basic residue at the +3 position relative to the phosphoserine, whereas substrates lacking this basic residue were not effectively hydrolyzed. The intrinsic selectivity of Cdc14 may help establish the order of Cdk substrate dephosphorylation during mitotic exit and contribute to roles in other cellular processes.
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Affiliation(s)
- Steven C Bremmer
- Department of Biochemistry, Purdue Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, USA
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25
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Eissler CL, Bremmer SC, Martinez JS, Parker LL, Charbonneau H, Hall MC. A general strategy for studying multisite protein phosphorylation using label-free selected reaction monitoring mass spectrometry. Anal Biochem 2011; 418:267-75. [PMID: 21810403 DOI: 10.1016/j.ab.2011.07.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 07/14/2011] [Accepted: 07/15/2011] [Indexed: 01/26/2023]
Abstract
The majority of eukaryotic proteins are phosphorylated in vivo, and phosphorylation may be the most common regulatory posttranslational modification. Many proteins are phosphorylated at numerous sites, often by multiple kinases, which may have different functional consequences. Understanding biological functions of phosphorylation events requires methods to detect and quantify individual sites within a substrate. Here we outline a general strategy that addresses this need and relies on the high sensitivity and specificity of selected reaction monitoring (SRM) mass spectrometry, making it potentially useful for studying in vivo phosphorylation without the need to isolate target proteins. Our approach uses label-free quantification for simplicity and general applicability, although it is equally compatible with stable isotope quantification methods. We demonstrate that label-free SRM-based quantification is comparable to conventional assays for measuring the kinetics of phosphatase and kinase reactions in vitro. We also demonstrate the capability of this method to simultaneously measure relative rates of phosphorylation and dephosphorylation of substrate mixtures, including individual sites on intact protein substrates in the context of a whole cell extract. This strategy should be particularly useful for characterizing the physiological substrate specificity of kinases and phosphatases and can be applied to studies of other protein modifications as well.
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Affiliation(s)
- Christie L Eissler
- Department of Biochemistry, Purdue University, West Lafayette, IN 47907, USA
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26
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Zhou G, Yan X, Wu D, Kron SJ. Photocleavable peptide-conjugated magnetic beads for protein kinase assays by MALDI-TOF MS. Bioconjug Chem 2011; 21:1917-24. [PMID: 20860375 DOI: 10.1021/bc1003058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Peptides were immobilized onto superparamagnetic beads via photocleavable linkers. This enabled simple, rapid, and label-free protein kinase assays via MALDI-TOF MS detection of substrate peptide phosphorylation. Abltide, a model substrate for the Abl protein tyrosine kinase model, was coupled onto amine-terminated beads, incubated with ATP and recombinant c-Abl kinase, and released and further detected to determine phosphorylation. Abltide phosphorylation was found to depend significantly on the length and composition of linkers to the bead surface. Inserting a diblock spacer of poly(glycine) and poly(ethylene glycol) segments markedly enhanced phosphorylation. To validate the assay, the activity of two small-molecule kinase inhibitors, imatinib and dasatinib, which target the oncogenic mutant tyrosine kinase Bcr-Abl to treat chronic myeloid leukemia (CML), was tested. Examining inhibition of the purified c-Abl or Bcr-Abl in K562 CML cell extracts, IC(50) values were determined to be consistent with the literature. This simple, label-free, MALDI-based protein kinase assay can be readily adapted to allow multiplexed assays of multiple peptide substrates and/or analysis of alternative post-translational modifications as a tool for drug discovery and clinical testing.
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Affiliation(s)
- Guangchang Zhou
- Ludwig Center for Metastasis Research, The University of Chicago, Chicago, Illinois 60637, USA
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27
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Zondlo SC, Gao F, Zondlo NJ. Design of an encodable tyrosine kinase-inducible domain: detection of tyrosine kinase activity by terbium luminescence. J Am Chem Soc 2010; 132:5619-21. [PMID: 20361796 DOI: 10.1021/ja100862u] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Tyrosine kinases are critical mediators of intracellular signaling and of intracellular responses to extracellular signaling. Changes in tyrosine kinase activity are implicated in numerous human diseases, including cancers, diabetes, and pathogen infectivity. To address questions in tyrosine phosphorylation, we have designed a protein tyrosine kinase-inducible domain, a small, genetically encodable protein motif whose structure is dependent on its tyrosine phosphorylation state. Tyrosine kinase-inducible domain peptides are based on EF-hand loops in which a structurally critical Glu12 residue is replaced by tyrosine at residue 11 or at residue 15 of the protein. Tyrosine kinase-inducible domain peptides bind terbium(III) in a phosphorylation-dependent manner, showing strong terbium luminescence when phosphorylated but weak terbium luminescence when not phosphorylated. Lanthanide binding was confirmed by NMR. A tyrosine kinase-inducible domain peptide, pKID-Abl, was designed to incorporate a recognition sequence of the Abl kinase. Incubation of pKID-Abl with Abl kinase resulted in a large increase in terbium luminescence. This increase in luminescence was abolished when pKID-Abl and Abl kinase were incubated with the Abl kinase inhibitor Gleevec. In addition, incubation of phosphorylated pKID-Abl with the tyrosine phosphatase YOP resulted in a large reduction in terbium luminescence. pKID-Abl was employed as a fluorescent sensor of Abl tyrosine kinase activity in HeLa cell extracts, exhibiting low luminescence with extracts from serum-starved cells and increased luminescence using extracts from EGF-treated cells. These results indicate that tyrosine kinase-inducible domains may be used as sensors of tyrosine kinase and tyrosine phosphatase activity and in the detection of tyrosine kinase inhibitors.
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Affiliation(s)
- Susan Carr Zondlo
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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