1
|
Woitok M, Grieger E, Akinrinmade OA, Bethke S, Pham AT, Stein C, Fendel R, Fischer R, Barth S, Niesen J. Using the SNAP-Tag technology to easily measure and demonstrate apoptotic changes in cancer and blood cells with different dyes. PLoS One 2020; 15:e0243286. [PMID: 33270761 PMCID: PMC7714129 DOI: 10.1371/journal.pone.0243286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 11/18/2020] [Indexed: 11/18/2022] Open
Abstract
In vitro and ex vivo development of novel therapeutic agents requires reliable and accurate analyses of the cell conditions they were preclinical tested for, such as apoptosis. The detection of apoptotic cells by annexin V (AV) coupled to fluorophores has often shown limitations in the choice of the dye due to interference with other fluorescent-labeled cell markers. The SNAP-tag technology is an easy, rapid and versatile method for functionalization of proteins and was therefore used for labeling AV with various fluorophores. We generated the fusion protein AV-SNAP and analyzed its capacity for the specific display of apoptotic cells in various assays with therapeutic agents. AV-SNAP showed an efficient coupling reaction with five different fluorescent dyes. Two selected fluorophores were tested with suspension, adherent and peripheral blood cells, treated by heat-shock or apoptosis-inducing therapeutic agents. Flow cytometry analysis of apoptotic cells revealed a strong visualization using AV-SNAP coupled to these two fluorophores exemplary, which was comparable to a commercial AV-Assay-kit. The combination of the apoptosis-specific binding protein AV with the SNAP-tag provides a novel solid method to facilitate protein labeling using several, easy to change, fluorescent dyes at once. It avoids high costs and allows an ordinary exchange of dyes and easier use of other fluorescent-labeled cell markers, which is of high interest for the preclinical testing of therapeutic agents in e.g. cancer research.
Collapse
Affiliation(s)
- Mira Woitok
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Molecular Biotechnology (Biology VII), RWTH Aachen University, Aachen, Germany
| | - Elena Grieger
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
| | - Olusiji A. Akinrinmade
- Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, University of Cape Town, Observatory, Cape Town, South Africa
| | - Susanne Bethke
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Molecular Biotechnology (Biology VII), RWTH Aachen University, Aachen, Germany
| | - Anh Tuan Pham
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
| | - Christoph Stein
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
| | - Rolf Fendel
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Rainer Fischer
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Molecular Biotechnology (Biology VII), RWTH Aachen University, Aachen, Germany
| | - Stefan Barth
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, University of Cape Town, Observatory, Cape Town, South Africa
| | - Judith Niesen
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Aachen, Germany
- Department of Pediatric Hematology and Oncology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
- * E-mail:
| |
Collapse
|
2
|
Kale supplementation up-regulates HSP70 and suppresses cognitive decline in a mouse model of accelerated senescence. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.03.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
|
3
|
Cavanaugh A, Juengst B, Sheridan K, Danella JF, Williams H. Combined inhibition of heat shock proteins 90 and 70 leads to simultaneous degradation of the oncogenic signaling proteins involved in muscle invasive bladder cancer. Oncotarget 2016; 6:39821-38. [PMID: 26556859 PMCID: PMC4741863 DOI: 10.18632/oncotarget.5496] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 10/22/2015] [Indexed: 12/21/2022] Open
Abstract
Heat shock protein 90 (HSP90) plays a critical role in the survival of cancer cells including muscle invasive bladder cancer (MIBC). The addiction of tumor cells to HSP90 has promoted the development of numerous HSP90 inhibitors and their use in clinical trials. This study evaluated the role of inhibiting HSP90 using STA9090 (STA) alone or in combination with the HSP70 inhibitor VER155008 (VER) in several human MIBC cell lines. While both STA and VER inhibited MIBC cell growth and migration and promoted apoptosis, combination therapy was more effective. Therefore, the signaling pathways involved in MIBC were systematically interrogated following STA and/or VER treatments. STA and not VER reduced the expression of proteins in the p53/Rb, PI3K and SWI/SWF pathways. Interestingly, STA was not as effective as VER or combination therapy in degrading proteins involved in the histone modification pathway such as KDM6A (demethylase) and EP300 (acetyltransferase) as predicted by The Cancer Genome Atlas (TCGA) data. This data suggests that dual HSP90 and HSP70 inhibition can simultaneously disrupt the key signaling pathways in MIBC.
Collapse
Affiliation(s)
- Alice Cavanaugh
- Weis Center for Research, Geisinger Health System, Danville, PA, USA
| | - Brendon Juengst
- Penn State University, Department of Plant Biology, State College, PA, USA
| | - Kathleen Sheridan
- Weis Center for Research, Geisinger Health System, Danville, PA, USA
| | - John F Danella
- Department of Urology, Geisinger Health System, Danville, PA, USA
| | - Heinric Williams
- Weis Center for Research, Geisinger Health System, Danville, PA, USA.,Department of Urology, Geisinger Health System, Danville, PA, USA
| |
Collapse
|