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Phosphatidylserine in the Nervous System: Cytoplasmic Regulator of the AKT and PKC Signaling Pathways and Extracellular "Eat-Me" Signal in Microglial Phagocytosis. Mol Neurobiol 2023; 60:1050-1066. [PMID: 36401705 DOI: 10.1007/s12035-022-03133-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/08/2022] [Indexed: 11/21/2022]
Abstract
Phosphatidylserine (PtdSer) is an important anionic phospholipid found in eukaryotic cells and has been proven to serve as a beneficial factor in the treatment of neurodegenerative diseases. PtdSer resides in the inner leaflet of the plasma membrane, where it is involved in regulating the AKT and PKC signaling pathways; however, it becomes exposed to the extracellular leaflet during neurodevelopmental processes and neurodegenerative diseases, participating in microglia-mediated synaptic and neuronal phagocytosis. In this paper, we review several characteristics of PtdSer, including the synthesis and translocation of PtdSer, the functions of cytoplasmic and exposed PtdSer, and different PtdSer-detection materials used to further understand the role of PtdSer in the nervous system.
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2
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Kumar N, Roopa, Bhalla V, Kumar M. Beyond zinc coordination: Bioimaging applications of Zn(II)-complexes. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213550] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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Affiliation(s)
- Arundhati Nag
- Carlson School of Chemistry and Biochemistry Clark University Worcester MA 01610 Phone: 15084213897 Fax: 15087937117
| | - Samir Das
- Carlson School of Chemistry and Biochemistry Clark University Worcester MA 01610
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4
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Chen YY, Lo CF, Chiu TY, Hsu CY, Yeh TK, Chen CP, Huang CL, Huang CY, Wang MH, Huang YC, Ho HH, Chao YS, Shih JC, Tsou LK, Chen CT. BPRDP056, a novel small molecule drug conjugate specifically targeting phosphatidylserine for cancer therapy. Transl Oncol 2020; 14:100897. [PMID: 33069101 PMCID: PMC7569237 DOI: 10.1016/j.tranon.2020.100897] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/20/2020] [Accepted: 09/22/2020] [Indexed: 12/25/2022] Open
Abstract
Zinc(II)-dipicolylamine (Zn-DPA) has been shown to specifically identify and bind to phosphatidylserine (PS), which exists in bulk in the tumor microenvironment. BPRDP056, a Zn-DPA-SN38 conjugate was designed to provide PS-targeted drug delivery of a cytotoxic SN38 to the tumor microenvironment, thereby allowing a lower dosage of SN38 that induces apoptosis in cancer cells. Micro-Western assay showed that BPRDP056 exhibited apoptotic signal levels similar to those of CPT-11 in the treated tumors growing in mice. Pharmacokinetic study showed that BPRDP056 has excellent systemic stability in circulation in mice and rats. BPRDP056 is accumulated in tumors and thus increases the cytotoxic effects of SN38. The in vivo antitumor activities of BPRDP056 have been shown to be significant in subcutaneous pancreas, prostate, colon, liver, breast, and glioblastoma tumors, included an orthotopic pancreatic tumor, in mice. BPRDP056 shrunk tumors at a lower (~20% only) dosing intensity of SN38 compared to that of SN38 conjugated in CPT-11 in all tumor models tested. A wide spectrum of antitumor activities is expected to treat all cancer types of PS-rich tumor microenvironments. BPRDP056 is a first-in-class small molecule drug conjugate for cancer therapy.
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Affiliation(s)
- Yun-Yu Chen
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Chen-Fu Lo
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Tai-Yu Chiu
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Chia-Yu Hsu
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Teng-Kuang Yeh
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Ching-Ping Chen
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Chen-Lung Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Chung-Yu Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Min-Hsien Wang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Yu-Chen Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Hsuan-Hui Ho
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Yu-Sheng Chao
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Joe C Shih
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC
| | - Lun K Tsou
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC.
| | - Chiung-Tong Chen
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan, ROC.
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5
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Scott‐Hewitt N, Perrucci F, Morini R, Erreni M, Mahoney M, Witkowska A, Carey A, Faggiani E, Schuetz LT, Mason S, Tamborini M, Bizzotto M, Passoni L, Filipello F, Jahn R, Stevens B, Matteoli M. Local externalization of phosphatidylserine mediates developmental synaptic pruning by microglia. EMBO J 2020; 39:e105380. [PMID: 32657463 PMCID: PMC7429741 DOI: 10.15252/embj.2020105380] [Citation(s) in RCA: 209] [Impact Index Per Article: 52.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/05/2020] [Accepted: 06/15/2020] [Indexed: 12/21/2022] Open
Abstract
Neuronal circuit assembly requires the fine balance between synapse formation and elimination. Microglia, through the elimination of supernumerary synapses, have an established role in this process. While the microglial receptor TREM2 and the soluble complement proteins C1q and C3 are recognized as key players, the neuronal molecular components that specify synapses to be eliminated are still undefined. Here, we show that exposed phosphatidylserine (PS) represents a neuronal "eat-me" signal involved in microglial-mediated pruning. In hippocampal neuron and microglia co-cultures, synapse elimination can be partially prevented by blocking accessibility of exposed PS using Annexin V or through microglial loss of TREM2. In vivo, PS exposure at both hippocampal and retinogeniculate synapses and engulfment of PS-labeled material by microglia occurs during established developmental periods of microglial-mediated synapse elimination. Mice deficient in C1q, which fail to properly refine retinogeniculate connections, have elevated presynaptic PS exposure and reduced PS engulfment by microglia. These data provide mechanistic insight into microglial-mediated synapse pruning and identify a novel role of developmentally regulated neuronal PS exposure that is common among developing brain structures.
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Affiliation(s)
- Nicole Scott‐Hewitt
- F.M. Kirby Center for NeurobiologyBoston Children's HospitalBostonMAUSA
- Stanley Center for Psychiatric ResearchThe Broad Institute of MIT and HarvardCambridgeMAUSA
| | - Fabio Perrucci
- Laboratory of Pharmacology and Brain PathologyNeurocenterHumanitas Clinical and Research Center ‐ IRCCSRozzano (MI)Italy
- Department of Biomedical SciencesHumanitas UniversityPieve Emanuele (MI)Italy
| | - Raffaella Morini
- Laboratory of Pharmacology and Brain PathologyNeurocenterHumanitas Clinical and Research Center ‐ IRCCSRozzano (MI)Italy
| | - Marco Erreni
- Unit of Advanced Optical MicroscopyHumanitas Clinical and Research Center ‐ IRCCSRozzano (MI)Italy
| | - Matthew Mahoney
- F.M. Kirby Center for NeurobiologyBoston Children's HospitalBostonMAUSA
| | - Agata Witkowska
- Laboratory of NeurobiologyMax Planck Institute for Biophysical ChemistryGöttingenGermany
- Department of Molecular Pharmacology and Cell BiologyLeibniz‐Forschungsinstitut für Molekulare Pharmakologie (FMP)BerlinGermany
| | - Alanna Carey
- F.M. Kirby Center for NeurobiologyBoston Children's HospitalBostonMAUSA
| | - Elisa Faggiani
- Laboratory of Pharmacology and Brain PathologyNeurocenterHumanitas Clinical and Research Center ‐ IRCCSRozzano (MI)Italy
| | | | - Sydney Mason
- F.M. Kirby Center for NeurobiologyBoston Children's HospitalBostonMAUSA
| | - Matteo Tamborini
- Laboratory of Pharmacology and Brain PathologyNeurocenterHumanitas Clinical and Research Center ‐ IRCCSRozzano (MI)Italy
| | - Matteo Bizzotto
- Department of Biomedical SciencesHumanitas UniversityPieve Emanuele (MI)Italy
| | - Lorena Passoni
- Laboratory of Pharmacology and Brain PathologyNeurocenterHumanitas Clinical and Research Center ‐ IRCCSRozzano (MI)Italy
| | - Fabia Filipello
- Laboratory of Pharmacology and Brain PathologyNeurocenterHumanitas Clinical and Research Center ‐ IRCCSRozzano (MI)Italy
- Department of Biomedical SciencesHumanitas UniversityPieve Emanuele (MI)Italy
- Present address:
Department of NeurologyWashington UniversitySt. LouisMOUSA
| | - Reinhard Jahn
- Laboratory of NeurobiologyMax Planck Institute for Biophysical ChemistryGöttingenGermany
- University of GöttingenGöttingenGermany
| | - Beth Stevens
- F.M. Kirby Center for NeurobiologyBoston Children's HospitalBostonMAUSA
- Stanley Center for Psychiatric ResearchThe Broad Institute of MIT and HarvardCambridgeMAUSA
- Howard Hughes Medical InstituteBoston Children's HospitalBostonMAUSA
| | - Michela Matteoli
- Laboratory of Pharmacology and Brain PathologyNeurocenterHumanitas Clinical and Research Center ‐ IRCCSRozzano (MI)Italy
- CNR Institute of NeuroscienceMilanoItaly
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6
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Zhang D, Jin Q, Jiang C, Gao M, Ni Y, Zhang J. Imaging Cell Death: Focus on Early Evaluation of Tumor Response to Therapy. Bioconjug Chem 2020; 31:1025-1051. [PMID: 32150392 DOI: 10.1021/acs.bioconjchem.0c00119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cell death plays a prominent role in the treatment of cancer, because most anticancer therapies act by the induction of cell death including apoptosis, necrosis, and other pathways of cell death. Imaging cell death helps to identify treatment responders from nonresponders and thus enables patient-tailored therapy, which will increase the likelihood of treatment response and ultimately lead to improved patient survival. By taking advantage of molecular probes that specifically target the biomarkers/biochemical processes of cell death, cell death imaging can be successfully achieved. In recent years, with the increased understanding of the molecular mechanism of cell death, a variety of well-defined biomarkers/biochemical processes of cell death have been identified. By targeting these established cell death biomarkers/biochemical processes, a set of molecular imaging probes have been developed and evaluated for early monitoring treatment response in tumors. In this review, we mainly present the recent advances in identifying useful biomarkers/biochemical processes for both apoptosis and necrosis imaging and in developing molecular imaging probes targeting these biomarkers/biochemical processes, with a focus on their application in early evaluation of tumor response to therapy.
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Affiliation(s)
- Dongjian Zhang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
| | - Qiaomei Jin
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
| | - Cuihua Jiang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
| | - Meng Gao
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
| | - Yicheng Ni
- Theragnostic Laboratory, Campus Gasthuisberg, KU Leuven, Leuven 3000, Belgium
| | - Jian Zhang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, P.R. China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing 210028, P.R. China
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7
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Abstract
The spatiotemporal determination of molecular events and cells is important for understanding disease processes, especially in oncology, and thus for the development of novel treatments. Equally important is the knowledge of the biodistribution, localization, and targeted accumulation of novel therapies as well as monitoring of tumor growth and therapeutic response. Optical imaging provides an ideal versatile platform for imaging of all these problems and questions.
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8
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Naidoo C, Kruger CA, Abrahamse H. Targeted photodynamic therapy treatment of in vitro A375 metastatic melanoma cells. Oncotarget 2019; 10:6079-6095. [PMID: 31692760 PMCID: PMC6817449 DOI: 10.18632/oncotarget.27221] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 08/17/2019] [Indexed: 12/13/2022] Open
Abstract
Metastatic Melanoma (MM) is a deadly form of skin cancer and many photodynamic therapy (PDT) studies have noted limitations in relation to effective photosensitizer (PS) drug uptake in tumors. The focus of this study was to develop a PS multicomponent nanoparticle drug conjugate carrier system which specifically targets MM cells via biomarkers to actively enhance PS delivery and so improve MM PDT. An antibody-metallated phthalocyanine-polyethylene glycol-gold nanoparticle drug conjugate, was successfully synthesized and characterized. PS active drug targeting PDT experiments at 673 nm were conducted within in vitro cultured MM. Results noted that this drug conjugate enhanced the PDT treatment of MM, through improved subcellular localization of the PS, as well as noted significantly improved cytotoxic and late apoptotic cellular death in cells. The results from this study demonstrate that through the bio-active antibody PS drug targeting of MM, the efficacy of PDT treatment for this cancer can be enhanced.
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Affiliation(s)
- Channay Naidoo
- Laser Research Centre, University of Johannesburg, Johannesburg, South Africa
| | - Cherie Ann Kruger
- Laser Research Centre, University of Johannesburg, Johannesburg, South Africa
| | - Heidi Abrahamse
- Laser Research Centre, University of Johannesburg, Johannesburg, South Africa
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Li W, Gong X, Fan X, Yin S, Su D, Zhang X, Yuan L. Recent advances in molecular fluorescent probes for organic phosphate biomolecules recognition. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.07.056] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Zhao H, Zhou P, Huang K, Deng G, Zhou Z, Wang J, Wang M, Zhang Y, Yang H, Yang S. Amplifying Apoptosis Homing Nanoplatform for Tumor Theranostics. Adv Healthc Mater 2018; 7:e1800296. [PMID: 29745029 DOI: 10.1002/adhm.201800296] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 04/10/2018] [Indexed: 02/05/2023]
Abstract
Nanomedicine has significantly impacted cancer theranostics. However, its efficiency is restricted by the limited enhanced permeability and retention effect of nanomaterials and insufficient density/specificity of receptors of tumor cells. Herein, an apoptosis-homing nanoplatform based on zinc(II) dipicolylamine (ZnDPA) conjugated Fe/Fe3 O4 nanoparticles (MNPs/ZnDPA), which demonstrates amplified magnetic resonance signal and photothermal therapy, is developed. In an apoptotic xenograft model constructed by doxorubicin, due to the high affinity between ZnDPA and the upregulated level of phosphatidylserine on the outer surface of apoptotic cancer cells, the accumulation value of MNPs/ZnDPA is enhanced two-fold and the tumor/muscle ratio of T2 values is decreased to 50% compared to that in the normal xenograft model. In the apoptotic xenograft model, the amplifying photothermal therapy is confirmed by the changes of the relative tumor volume and terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end-labeling staining. This nanoplatform provides a promising strategy to improve the targeting efficiency of nanoparticles and the enhancement of tumor-targeting theranostics.
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Affiliation(s)
- Heng Zhao
- The Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors; Shanghai Normal University; Shanghai 200234 China
| | - Ping Zhou
- The Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors; Shanghai Normal University; Shanghai 200234 China
| | - Kai Huang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province; Shenzhen University; Shenzhen 518060 China
| | - Guang Deng
- The Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors; Shanghai Normal University; Shanghai 200234 China
| | - Zhiguo Zhou
- The Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors; Shanghai Normal University; Shanghai 200234 China
| | - Jing Wang
- The Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors; Shanghai Normal University; Shanghai 200234 China
| | - Mingwei Wang
- Department of Nuclear Medicine; Fudan University Shanghai Cancer Center; Shanghai 200032 China
- Department of Oncology; Shanghai Medical College; Fudan University; Shanghai 200032 China
- Shanghai Engineering Research; Center for Molecular Imaging Probes; Shanghai 200032 China
| | - Yingjian Zhang
- Department of Nuclear Medicine; Fudan University Shanghai Cancer Center; Shanghai 200032 China
- Department of Oncology; Shanghai Medical College; Fudan University; Shanghai 200032 China
- Shanghai Engineering Research; Center for Molecular Imaging Probes; Shanghai 200032 China
| | - Hong Yang
- The Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors; Shanghai Normal University; Shanghai 200234 China
| | - Shiping Yang
- The Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors; Shanghai Normal University; Shanghai 200234 China
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Wang H, Wu Z, Li S, Hu K, Tang G. Synthesis and evaluation of a radiolabeled bis-zinc(II)-cyclen complex as a potential probe for in vivo imaging of cell death. Apoptosis 2018; 22:585-595. [PMID: 28084570 DOI: 10.1007/s10495-017-1344-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The exposition of phosphatidylserine (PS) from the cell membrane is associated with most cell death programs (apoptosis, necrosis, autophagy, mitotic catastrophe, etc.), which makes PS an attractive target for overall cell death imaging. To this end, zinc(II) macrocycle coordination complexes with cyclic polyamine units as low-molecular-weight annexin mimics have a selective affinity for biomembrane surfaces enriched with PS, and are therefore useful for detection of cell death. In the present study, a 11C-labeled zinc(II)-bis(cyclen) complex (11C-CyclenZn2) was prepared and evaluated as a new positron emission tomography (PET) probe for cell death imaging. 11C-CyclenZn2 was synthesized by methylation of its precursor, 4-methoxy-2,5-di-[10-methyl-1,4,7,10-tetraazacyclododecane-1,4,7-tricarboxylic acid tri-tert-butyl ester] phenol (Boc-Cyclen2) with 11C-methyl triflate as a prosthetic group in acetone, deprotection by hydrolysis in aqueous HCl solution, and chelation with zinc nitrate. The cell death imaging capability of 11C-CyclenZn2 was evaluated using in vitro cell uptake assays with camptothecin-treated PC-3 cells, biodistribution studies, and in vivo PET imaging in Kunming mice bearing S-180 fibrosarcoma. Starting from 11C-methyl triflate, the total preparation time for 11C-CyclenZn2 was ~40 min, with an uncorrected radiochemical yield of 12 ± 3% (based on 11C-CH3OTf, n = 10), a radiochemical purity of greater than 95%, and the specific activity of 0.75-1.01 GBq/μmol. The cell death binding specificity of 11C-CyclenZn2 was demonstrated by significantly different uptake rates in camptothecin-treated and control PC-3 cells in vitro. Inhibition experiments for 18F-radiofluorinated Annexin V binding to apoptotic/necrotic cells illustrated the necessity of zinc ions for zinc(II)-bis(cyclen) complexation in binding cell death, and zinc(II)-bis(cyclen) complexe and Annexin V had not identical binding pattern with apoptosis/necrosis cells. Biodistribution studies of 11C-CyclenZn2 revealed a fast clearance from blood, low uptake rates in brain and muscle tissue, and high uptake rates in liver and kidney, which provide the main metabolic route. PET imaging using 11C-CyclenZn2 revealed that cyclophosphamide-treated mice (CP-treated group) exhibited a significant increase of uptake rate in the tumor at 60 min postinjection, compared with control mice (Control group). The results indicate that the ability of 11C-CyclenZn2 to detect cell death is comparable to Annexin V, and it has potential as a PET tracer for noninvasive evaluation and monitoring of anti-tumor chemotherapy.
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Affiliation(s)
- Hongliang Wang
- Department of Nuclear Medicine, The First Hospital, Shanxi Medical University, Taiyuan, 030001, China.
- Department of Nuclear Medicine, PET-CT Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China.
| | - Zhifang Wu
- Department of Nuclear Medicine, The First Hospital, Shanxi Medical University, Taiyuan, 030001, China
| | - Sijin Li
- Department of Nuclear Medicine, The First Hospital, Shanxi Medical University, Taiyuan, 030001, China
| | - Kongzhen Hu
- Department of Nuclear Medicine, PET-CT Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Ganghua Tang
- Department of Nuclear Medicine, PET-CT Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, China.
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Naidoo C, Kruger CA, Abrahamse H. Photodynamic Therapy for Metastatic Melanoma Treatment: A Review. Technol Cancer Res Treat 2018; 17:1533033818791795. [PMID: 30099929 PMCID: PMC6090489 DOI: 10.1177/1533033818791795] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 06/04/2018] [Accepted: 07/03/2018] [Indexed: 01/21/2023] Open
Abstract
This review article is based on specifically targeted nanoparticles that have been used in the treatment of melanoma. According to the Skin Cancer Foundation, within 2017 an estimated 9730 people will die due to invasive melanoma. Conventional treatments for nonmalignant melanoma include surgery, chemotherapy, and radiation. For the treatment of metastatic melanoma, 3 therapeutic agents have been approved by the Food and Drug Administration: dacarbazine, recombinant interferon α-2b, and high-dose interleukin 2. Photodynamic therapy is an alternative therapy that activates a photosensitizer at a specific wavelength forming reactive oxygen species which in turn induces cell death; it is noninvasive with far less side effects when compared to conventional treatments. Nanoparticles are generally conjugated to photosynthetic drugs, since they are biocompatible, stabile, and durable, as well as have a high loading capacity, which improve either passive or active photosensitizer drug delivery to targeted cells. Therefore, various photosynthetic drugs and nanoparticle drug delivery systems specifically targeted for melanoma were analyzed in this review article in relation to either their passive or their active cellular uptake mechanisms in order to deduce the efficacy of photodynamic therapy treatment for metastatic melanoma which currently remains ongoing. The overall findings from this review concluded that no current photodynamic therapy studies have been performed in relation to active nanoparticle platform photosensitizer drug carrier systems for the treatment of metastatic melanoma, and so this type of research requires further investigation into developing a more efficient active nano-photosensitizer carrier smart drug that can be conjugated to specific cell surface receptors and combinative monoclonal antibodies so that a further enhanced and more efficient form of targeted photodynamic therapy for the treatment of metastatic melanoma can be established.
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Affiliation(s)
- Channay Naidoo
- Laser Research Centre, Faculty of Health Sciences, University of
Johannesburg, Johannesburg, South Africa
| | - Cherie Ann Kruger
- Laser Research Centre, Faculty of Health Sciences, University of
Johannesburg, Johannesburg, South Africa
| | - Heidi Abrahamse
- Laser Research Centre, Faculty of Health Sciences, University of
Johannesburg, Johannesburg, South Africa
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13
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Li J, Zheng H, Fodah R, Warawa JM, Ng CK. Validation of 2- 18F-Fluorodeoxysorbitol as a Potential Radiopharmaceutical for Imaging Bacterial Infection in the Lung. J Nucl Med 2017; 59:134-139. [PMID: 28848037 DOI: 10.2967/jnumed.117.195420] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/17/2017] [Indexed: 11/16/2022] Open
Abstract
2-18F-fluorodeoxysorbitol (18F-FDS) has been shown to be a promising agent with high selectivity and sensitivity in imaging bacterial infection. The objective of our study was to validate 18F-FDS as a potential radiopharmaceutical for imaging bacterial infection longitudinally in the lung. Methods: Albino C57 female mice were intratracheally inoculated with either live or dead Klebsiella pneumoniae to induce either lung infection or lung inflammation. One group of mice was imaged to monitor disease progression. PET/CT was performed on days 0, 1, 2, and 3 after inoculation using either 18F-FDS or 18F-FDG (n = 12 for each tracer). The other group was first screened by bioluminescent imaging (BLI) to select only mice with visible infection (region of interest > 108 ph/s) for PET/CT imaging with 18F-FDS (n = 12). For the inflammation group, 5 mice each were imaged with PET/CT using either 18F-FDS or 18F-FDG from days 1 to 4 after inoculation. Results: For studies of disease progression, BLI showed noticeable lung infection on day 2 after inoculation and significantly greater infection on day 3. Baseline imaging before inoculation showed no focal areas of lung consolidation on CT and low uptake in the lung for both PET radiotracers. On day 2, an area of lung consolidation was identified on CT, with a corresponding 2.5-fold increase over baseline for both PET radiotracers. On day 3, widespread areas of patchy lung consolidation were found on CT, with a drastic increase in uptake for both 18F-FDS and 18F-FDG (9.2 and 3.9). PET and BLI studies showed a marginal correlation between 18F-FDG uptake and colony-forming units (r = 0.63) but a much better correlation for 18F-FDS (r = 0.85). The uptake ratio of infected lung over inflamed lung was 8.5 and 1.7 for 18F-FDS and 18F-FDG on day 3. Conclusion: Uptake of both 18F-FDS and 18F-FDG in infected lung could be used to track the degree of bacterial infection measured by BLI, with a minimum detection limit of 107 bacteria. 18F-FDS, however, is more specific than 18F-FDG in differentiating K. pneumoniae lung infection from lung inflammation.
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Affiliation(s)
- Junling Li
- University of Louisville School of Medicine, Louisville, Kentucky
| | - Huaiyu Zheng
- University of Louisville School of Medicine, Louisville, Kentucky
| | - Ramy Fodah
- University of Louisville School of Medicine, Louisville, Kentucky
| | | | - Chin K Ng
- University of Louisville School of Medicine, Louisville, Kentucky
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15
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Raoufi Rad N, McRobb LS, Zhao Z, Lee VS, Patel NJ, Qureshi AS, Grace M, McHattan JJ, Amal Raj JV, Duong H, Kashba SR, Stoodley MA. Phosphatidylserine Translocation after Radiosurgery in an Animal Model of Arteriovenous Malformation. Radiat Res 2017; 187:701-707. [PMID: 28414573 DOI: 10.1667/rr14646.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Phosphatidylserine (PS) is asymmetrically distributed across the plasma membrane, located predominantly on the inner leaflet in healthy cells. Translocation of PS to the outer leaflet makes it available as a target for biological therapies. We examined PS translocation after radiosurgery in an animal model of brain arteriovenous malformation (AVM). An arteriovenous fistula was created by end-to-side anastomosis of the left external jugular vein to the common carotid artery in 6-week-old, male Sprague Dawley rats. Six weeks after AVM creation, 15 rats underwent Gamma Knife stereotactic radiosurgery receiving a single 15 Gy dose to the margin of the fistula; 15 rats received sham treatment. Externalization of PS was examined by intravenous injection of a PS-specific near-infrared probe, PSVue-794, and in vivo fluorescence optical imaging at 1, 7, 21, 42, 63 and 84 days postirradiation. Fluorescent signaling indicative of PS translocation to the luminal cell surface accumulated in the AVM region, in both irradiated and nonirradiated animals, at all time points. Fluorescence was localized specifically to the AVM region and was not present in any other anatomical sites. Translocated PS increased over time in irradiated rats (P < 0.001) but not in sham-irradiated rats and this difference reached statistical significance at day 84 (P < 0.05). In summary, vessels within the mature rat AVM demonstrate elevated PS externalization compared to normal vessels. A single dose of ionizing radiation can increase PS externalization in a time-dependent manner. Strict localization of PS externalization within the AVM region suggests that stereotactic radiosurgery can serve as an effective priming agent and PS may be a suitable candidate for vascular-targeting approaches to AVM treatment.
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Affiliation(s)
- Newsha Raoufi Rad
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Lucinda S McRobb
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Zhenjun Zhao
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Vivienne S Lee
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Nirav J Patel
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Anas Sarwar Qureshi
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Michael Grace
- b Genesis Cancer Care, Macquarie University Hospital, New South Wales, Australia
| | | | - Jude V Amal Raj
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Hong Duong
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
| | - Saleh R Kashba
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia.,d Department of Neurosurgery, Misurata Cancer Institute, Misurata University, Misurata, Libya
| | - Marcus A Stoodley
- a Department of Clinical Medicine, Faculty of Medicine and Health Sciences, Macquarie University, New South Wales, Australia
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16
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Rice DR, Clear KJ, Smith BD. Imaging and therapeutic applications of zinc(ii)-dipicolylamine molecular probes for anionic biomembranes. Chem Commun (Camb) 2016; 52:8787-801. [PMID: 27302091 PMCID: PMC4949593 DOI: 10.1039/c6cc03669d] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This feature article describes the development of synthetic zinc(ii)-dipicolylamine (ZnDPA) receptors as selective targeting agents for anionic membranes in cell culture and living subjects. There is a strong connection between anionic cell surface charge and disease, and ZnDPA probes have been employed extensively for molecular imaging and targeted therapeutics. Fluorescence and nuclear imaging applications include detection of diseases such as cancer, neurodegeneration, arthritis, and microbial infection, and also quantification of cell death caused by therapy. Therapeutic applications include selective targeting of cytotoxic agents and drug delivery systems, photodynamic inactivation, and modulation of the immune system. The article concludes with a summary of expected future directions.
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Affiliation(s)
- Douglas R Rice
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, 46556 IN, USA.
| | - Kasey J Clear
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, 46556 IN, USA.
| | - Bradley D Smith
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, 46556 IN, USA.
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17
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Smith BD. Smart molecules for imaging, sensing and health (SMITH). Beilstein J Org Chem 2015; 11:2540-8. [PMID: 26734100 PMCID: PMC4685796 DOI: 10.3762/bjoc.11.274] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 11/28/2015] [Indexed: 12/11/2022] Open
Abstract
This autobiographical review provides a personal account of the author's academic journey in supramolecular chemistry, including brief summaries of research efforts in membrane transport, molecular imaging, ion-pair receptors, rotaxane synthesis, squaraine rotaxanes, and synthtavidin technology. The article concludes with a short perspective of likely future directions in biomedical supramolecular chemistry.
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18
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Clear KJ, Harmatys KM, Rice DR, Wolter WR, Suckow MA, Wang Y, Rusckowski M, Smith BD. Phenoxide-Bridged Zinc(II)-Bis(dipicolylamine) Probes for Molecular Imaging of Cell Death. Bioconjug Chem 2015; 27:363-75. [PMID: 26334386 DOI: 10.1021/acs.bioconjchem.5b00447] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Cell death is involved in many pathological conditions, and there is a need for clinical and preclinical imaging agents that can target and report cell death. One of the best known biomarkers of cell death is exposure of the anionic phospholipid phosphatidylserine (PS) on the surface of dead and dying cells. Synthetic zinc(II)-bis(dipicolylamine) (Zn2BDPA) coordination complexes are known to selectively recognize PS-rich membranes and act as cell death molecular imaging agents. However, there is a need to improve in vivo imaging performance by selectively increasing target affinity and decreasing off-target accumulation. This present study compared the cell death targeting ability of two new deep-red fluorescent probes containing phenoxide-bridged Zn2BDPA complexes. One probe was a bivalent version of the other and associated more strongly with PS-rich liposome membranes. However, the bivalent probe exhibited self-quenching on the membrane surface, so the monovalent version produced brighter micrographs of dead and dying cells in cell culture and also better fluorescence imaging contrast in two living animal models of cell death (rat implanted tumor with necrotic core and mouse thymus atrophy). An (111)In-labeled radiotracer version of the monovalent probe also exhibited selective cell death targeting ability in the mouse thymus atrophy model, with relatively high amounts detected in dead and dying tissue and low off-target accumulation in nonclearance organs. The in vivo biodistribution profile is the most favorable yet reported for a Zn2BDPA complex; thus, the monovalent phenoxide-bridged Zn2BDPA scaffold is a promising candidate for further development as a cell death imaging agent in living subjects.
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Affiliation(s)
- Kasey J Clear
- Department of Chemistry and Biochemistry, University of Notre Dame , 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Kara M Harmatys
- Department of Chemistry and Biochemistry, University of Notre Dame , 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Douglas R Rice
- Department of Chemistry and Biochemistry, University of Notre Dame , 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - William R Wolter
- Freimann Life Science Center, University of Notre Dame , 400 Galvin Life Science, Notre Dame, Indiana 46556, United States
| | - Mark A Suckow
- Freimann Life Science Center, University of Notre Dame , 400 Galvin Life Science, Notre Dame, Indiana 46556, United States
| | - Yuzhen Wang
- Division of Nuclear Medicine, Department of Radiology, University of Massachusetts Medical School , Worcester, Massachusetts 01655, United States
| | - Mary Rusckowski
- Division of Nuclear Medicine, Department of Radiology, University of Massachusetts Medical School , Worcester, Massachusetts 01655, United States
| | - Bradley D Smith
- Department of Chemistry and Biochemistry, University of Notre Dame , 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
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Chan MM, Gray BD, Pak KY, Fong D. Non-invasive in vivo imaging of arthritis in a collagen-induced murine model with phosphatidylserine-binding near-infrared (NIR) dye. Arthritis Res Ther 2015; 17:50. [PMID: 25889786 PMCID: PMC4396543 DOI: 10.1186/s13075-015-0565-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 02/18/2015] [Indexed: 01/30/2023] Open
Abstract
Introduction Development of non-invasive molecular imaging techniques that are based on cellular changes in inflammation has been of active interest for arthritis diagnosis. This technology will allow real-time detection of tissue damage and facilitate earlier treatment of the disease, thus representing an improvement over X-rays, which detect bone damage at the advanced stage. Tracing apoptosis, an event occurring in inflammation, has been a strategy used. PSVue 794 is a low-molecular-weight, near-infrared (NIR)-emitting complex of bis(zinc2+-dipicolylamine) (Zn-DPA) that binds to phosphatidylserine (PS), a plasma membrane anionic phospholipid that becomes flipped externally upon cell death by apoptosis. In this study, we evaluated the capacity of PSVue 794 to act as an in vivo probe for non-invasive molecular imaging assessment of rheumatoid arthritis (RA) via metabolic function in murine collagen-induced arthritis, a widely adopted animal model for RA. Methods Male DBA/1 strain mice were treated twice with chicken collagen type II in Freund’s adjuvant. Their arthritis development was determined by measuring footpad thickness and confirmed with X-ray analysis and histology. In vivo imaging was performed with the NIR dye and the LI-COR Odyssey Image System. The level of emission was compared among mice with different disease severity, non-arthritic mice and arthritic mice injected with a control dye without the Zn-DPA targeting moiety. Results Fluorescent emission correlated reliably with the degree of footpad swelling and the manifestation of arthritis. Ex vivo examination showed emission was from the joint. Specificity of binding was confirmed by the lack of emission when arthritic mice were given the control dye. Furthermore, the PS-binding protein annexin V displaced the NIR dye from binding, and the difference in emission was numerically measurable on a scale. Conclusions This report introduces an economical alternative method for assessing arthritis non-invasively in murine models. Inflammation in feet and ankles can be measured longitudinally using the PSVue 794 probe for cell death and with a commonly available multipurpose imager. This technique provides metabolic and functional information that anatomical measurement of footpad swelling or visual determination of arthritic index cannot. It also may decrease the number of animals required per experiment because tissue damage will not necessarily require evaluation by harvesting joints for histology.
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Affiliation(s)
- Marion M Chan
- Department of Microbiology and Immunology, Temple University School of Medicine, 3400 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Brian D Gray
- Molecular Targeting Technologies, Inc., 833 Lincoln Avenue, West Chester, PA, 19380, USA.
| | - Koon Y Pak
- Molecular Targeting Technologies, Inc., 833 Lincoln Avenue, West Chester, PA, 19380, USA.
| | - Dunne Fong
- Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, 604 Allison Road, Piscataway, NJ, 08854, USA.
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20
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Characterization of 18F-dipicolylamine (DPA) derivatives in cells infected with influenza virus. Nucl Med Biol 2015; 42:283-91. [DOI: 10.1016/j.nucmedbio.2014.11.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 10/08/2014] [Accepted: 11/24/2014] [Indexed: 01/03/2023]
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21
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Zeng W, Wang X, Xu P, Liu G, Eden HS, Chen X. Molecular imaging of apoptosis: from micro to macro. Theranostics 2015; 5:559-82. [PMID: 25825597 PMCID: PMC4377726 DOI: 10.7150/thno.11548] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 02/18/2015] [Indexed: 12/21/2022] Open
Abstract
Apoptosis, or programmed cell death, is involved in numerous human conditions including neurodegenerative diseases, ischemic damage, autoimmune disorders and many types of cancer, and is often confused with other types of cell death. Therefore strategies that enable visualized detection of apoptosis would be of enormous benefit in the clinic for diagnosis, patient management, and development of new therapies. In recent years, improved understanding of the apoptotic machinery and progress in imaging modalities have provided opportunities for researchers to formulate microscopic and macroscopic imaging strategies based on well-defined molecular markers and/or physiological features. Correspondingly, a large collection of apoptosis imaging probes and approaches have been documented in preclinical and clinical studies. In this review, we mainly discuss microscopic imaging assays and macroscopic imaging probes, ranging in complexity from simple attachments of reporter moieties to proteins that interact with apoptotic biomarkers, to rationally designed probes that target biochemical changes. Their clinical translation will also be our focus.
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22
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Palmowski K, Rix A, Lederle W, Behrendt FF, Mottaghy FM, Gray BD, Pak KY, Palmowski M, Kiessling F. A low molecular weight zinc2+-dipicolylamine-based probe detects apoptosis during tumour treatment better than an annexin V-based probe. Eur Radiol 2014; 24:363-70. [PMID: 24121671 DOI: 10.1007/s00330-013-3014-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 08/26/2013] [Accepted: 08/28/2013] [Indexed: 02/01/2023]
Abstract
OBJECTIVES Molecular imaging of apoptosis is frequently discussed for monitoring cancer therapies. Here, we compare the low molecular weight phosphatidylserine-targeting ligand zinc2+-dipicolylamine (Zn2+-DPA) with the established but reasonably larger protein annexin V. METHODS Molecular apoptosis imaging with the fluorescently labelled probes annexin V (750 nm, 36 kDa) and Zn2+-DPA (794 nm, 1.84 kDa) was performed in tumour-bearing mice (A431). Three animal groups were investigated: untreated controls and treated tumours after 1 or 4 days of anti-angiogenic therapy (SU11248). Additionally, μPET with 18 F-FDG was performed. Imaging data were displayed as tumour-to-muscle ratio (TMR) and validated by quantitative immunohistochemistry. RESULTS Compared with untreated control tumours, TUNEL staining indicated significant apoptosis after 1 day (P < 0.05) and 4 days (P < 0.01) of treatment. Concordantly, Zn2+-DPA uptake increased significantly after 1 day (P < 0.05) and 4 days (P < 0.01). Surprisingly, annexin V failed to detect significant differences between control and treated animals. Contrary to the increasing uptake of Zn2+-DPA, 18 F-FDG tumour uptake decreased significantly at days 1 (P < 0.05) and 4 (P < 0.01). CONCLUSIONS Increase in apoptosis during anti-angiogenic therapy was detected significantly better with the low molecular weight probe Zn2+-DPA than with the annexin V-based probe. Additionally, significant treatment effects were detectable as early using Zn2+-DPA as with measurements of the glucose metabolism using 18 F-FDG. KEY POINTS • The detection of apoptosis by non-invasive imaging is important in oncology. • A new low molecular weight probe Zn2+-DPA shows promise in depicting anti-angiogenic effects. • The small Zn2+-DPA ligand appears well suited for monitoring therapy. • Treatment effects are detectable just as early with Zn2+-DPA as with 18F-FDG.
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23
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Turkyilmaz S, Rice DR, Palumbo R, Smith BD. Selective recognition of anionic cell membranes using targeted liposomes coated with zinc(ii)-bis(dipicolylamine) affinity units. Org Biomol Chem 2014; 12:5645-55. [PMID: 24962330 PMCID: PMC4128505 DOI: 10.1039/c4ob00924j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 06/18/2014] [Indexed: 01/18/2023]
Abstract
Zinc(ii)-bis(dipicolylamine) (Zn2BDPA) coated liposomes are shown to have high recognition selectivity towards vesicle and cell membranes with anionic surfaces. Robust synthetic methods were developed to produce Zn2BDPA-PEG-lipid conjugates with varying PEG linker chain length. One conjugate (Zn2BDPA-PEG2000-DSPE) was used in liposome formulations doped with the lipophilic near-infrared fluorophore DiR. Fluorescence cell microscopy studies demonstrated that the multivalent liposomes selectively and efficiently target bacteria in the presence of healthy mammalian cells and cause bacterial cell agglutination. The liposomes also exhibited selective staining of the surfaces of dead or dying human cancer cells that had been treated with a chemotherapeutic agent.
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Affiliation(s)
- Serhan Turkyilmaz
- Department of Chemistry and Biochemistry , 236 Nieuwland Science Hall and University of Notre Dame , Notre Dame , IN 46556 , USA .
- Faculty of Pharmacy , Department of Pharmaceutical Chemistry , Istanbul University , 34116 Beyazit , Istanbul , Turkey
| | - Douglas R. Rice
- Department of Chemistry and Biochemistry , 236 Nieuwland Science Hall and University of Notre Dame , Notre Dame , IN 46556 , USA .
| | - Rachael Palumbo
- Department of Chemistry and Biochemistry , 236 Nieuwland Science Hall and University of Notre Dame , Notre Dame , IN 46556 , USA .
| | - Bradley D. Smith
- Department of Chemistry and Biochemistry , 236 Nieuwland Science Hall and University of Notre Dame , Notre Dame , IN 46556 , USA .
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24
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Kwong JMK, Hoang C, Dukes RT, Yee RW, Gray BD, Pak KY, Caprioli J. Bis(zinc-dipicolylamine), Zn-DPA, a new marker for apoptosis. Invest Ophthalmol Vis Sci 2014; 55:4913-21. [PMID: 25034598 DOI: 10.1167/iovs.13-13346] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To characterize the labeling of apoptotic cells with a molecular probe of bis(zinc(II)-dipicolylamine) (Zn-DPA) conjugated with a fluorescent reporter in a rat model of retinal ganglion cell (RGC) degeneration induced by N-methyl-D-aspartate (NMDA). METHODS Adult Wistar rats were given unilateral intravitreal injections of 3 μL 40 mM neutralized NMDA and euthanized at 1, 2, 4, 24, and 48 hours. One hour before euthanasia, 3 μL Zn-DPA conjugated with fluorescein (Zn-DPA 480) was intravitreally injected. Prelabeling of RGC with retrograde fluorogold (FG), TUNEL, and immunohistochemistry with III β-tubulin and vimentin were performed. RESULTS Fluorescence labeling of Zn-DPA 480 was observed in the retinas from 1 hour up to 24 hours after NMDA injection, whereas the labeling was reduced at 48 hours postinjection. At both 4 and 24 hours postinjection, most Zn-DPA 480-positive cells in the RGC layer were labeled by FG and III β-tubulin. The number of TUNEL-positive cells increased from 4 to 24 hours. At 24 hours, 95.7% of Zn-DPA 480-positive cells were TUNEL positive, whereas 95.1% of TUNEL-positive cells were Zn-DPA 480 positive. The numbers of Zn-DPA 480-positive cells at 1 and 2 hours after NMDA injection were significantly higher than TUNEL. CONCLUSIONS Our findings demonstrate that intravitreal injection of fluorescent Zn-DPA 480 labels retinal neurons undergoing apoptosis and that recognition of exposed phosphatidylserine appears earlier than detection of DNA fragmentation, indicating the potential of Zn-DPA as an imaging probe for tracking degenerating retinal neurons.
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Affiliation(s)
- Jacky M K Kwong
- Jules Stein Eye Institute, University of California Los Angeles, Los Angeles, California, United States
| | - Celia Hoang
- Jules Stein Eye Institute, University of California Los Angeles, Los Angeles, California, United States
| | - Reshil T Dukes
- Jules Stein Eye Institute, University of California Los Angeles, Los Angeles, California, United States
| | - Richard W Yee
- Cizik Eye Clinic, Hermann University Eye Associates, Houston, Texas, United States
| | - Brian D Gray
- Molecular Targeting Technologies, Inc., West Chester, Pennsylvania, United States
| | - Koon Y Pak
- Molecular Targeting Technologies, Inc., West Chester, Pennsylvania, United States
| | - Joseph Caprioli
- Jules Stein Eye Institute, University of California Los Angeles, Los Angeles, California, United States
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25
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Cooley CM, Hettie KS, Klockow JL, Garrison S, Glass TE. A selective fluorescent chemosensor for phosphoserine. Org Biomol Chem 2014; 11:7387-92. [PMID: 24065122 DOI: 10.1039/c3ob41677a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fluorescent chemosensor for the detection of phosphoserine is reported. The ditopic sensor features a phosphate-coordinating zinc(II)-dipicolylamine (Zn(2+)-DPA) unit tethered to an amine-binding coumarin aldehyde fluorophore. With phosphoserine, the sensor demonstrates a 30-fold fluorescence enhancement under buffered aqueous conditions.
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Affiliation(s)
- Chad M Cooley
- Department of Chemistry, University of Missouri, 601 South College Avenue, Columbia, MO 65211, USA.
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26
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Plaunt AJ, Harmatys KM, Wolter WR, Suckow MA, Smith BD. Library synthesis, screening, and discovery of modified Zinc(II)-Bis(dipicolylamine) probe for enhanced molecular imaging of cell death. Bioconjug Chem 2014; 25:724-37. [PMID: 24575875 PMCID: PMC3993938 DOI: 10.1021/bc500003x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
![]()
Zinc(II)-bis(dipicolylamine)
(Zn-BDPA) coordination complexes selectively
target the surfaces of dead and dying mammalian cells, and they have
promise as molecular probes for imaging cell death. A necessary step
toward eventual clinical imaging applications is the development of
next-generation Zn-BDPA complexes with enhanced affinity for the cell
death membrane biomarker, phosphatidylserine (PS). This study employed
an iterative cycle of library synthesis and screening, using a novel
rapid equilibrium dialysis assay, to discover a modified Zn-BDPA structure
with high and selective affinity for vesicles containing PS. The lead
structure was converted into a deep-red fluorescent probe and its
targeting and imaging performance was compared with an unmodified
control Zn-BDPA probe. The evaluation process included a series of
FRET-based vesicle titration studies, cell microscopy experiments,
and rat tumor biodistribution measurements. In all cases, the modified
probe exhibited comparatively higher affinity and selectivity for
the target membranes of dead and dying cells. The results show that
this next-generation deep-red fluorescent Zn-BDPA probe is well suited
for preclinical molecular imaging of cell death in cell cultures and
animal models. Furthermore, it should be possible to substitute the
deep-red fluorophore with alternative reporter groups that enable
clinically useful, deep-tissue imaging modalities, such as MRI and
nuclear imaging.
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Affiliation(s)
- Adam J Plaunt
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall and ‡Department of Biological Science, Galvin Life Sciences, University of Notre Dame , Notre Dame, 46556 Indiana, United States
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27
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Bunschoten A, Welling MM, Termaat MF, Sathekge M, van Leeuwen FWB. Development and Prospects of Dedicated Tracers for the Molecular Imaging of Bacterial Infections. Bioconjug Chem 2013; 24:1971-89. [PMID: 24200346 DOI: 10.1021/bc4003037] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- A. Bunschoten
- Department
of Radiology, Interventional Molecular Imaging Laboratory, Leiden University Medical Center, Leiden, The Netherlands
| | - M. M. Welling
- Department
of Radiology, Interventional Molecular Imaging Laboratory, Leiden University Medical Center, Leiden, The Netherlands
| | - M. F. Termaat
- Department
of Trauma Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - M. Sathekge
- Department of Nuclear Medicine, University of Pretoria & Steve Biko Academic Hospital, Pretoria, South Africa
| | - F. W. B. van Leeuwen
- Department
of Radiology, Interventional Molecular Imaging Laboratory, Leiden University Medical Center, Leiden, The Netherlands
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28
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Illuminating the lipidome to advance biomedical research: peptide-based probes of membrane lipids. Future Med Chem 2013; 5:947-59. [PMID: 23682570 DOI: 10.4155/fmc.13.66] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Systematic investigation of the lipidome will reveal new opportunities for disease diagnosis and intervention. However, lipidomic research has been hampered by the lack of molecular tools to track specific lipids of interest. Accumulating reports indicate lipid recognition can be achieved with properly constructed short peptides in addition to large proteins. This review summarizes the key developments of this area within the past decade. Select lantibiotic peptides present the best examples of low-molecular-weight probes of membrane lipids, displaying selectivity comparable to lipid-binding proteins. Designed peptides, through biomimetic approaches and combinational screening, have begun to demonstrate their potential for lipid tracking in cultured cells and even in living organisms. Biophysical characterization of these lipid-targeting peptides has revealed certain features critical for selective membrane binding, including preorganized scaffolds and the balance of polar and nonpolar interactions. The knowledge summarized herein should facilitate the development of molecular tools to target a variety of membrane lipids.
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29
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Park D, Xie BW, Van Beek ER, Blankevoort V, Que I, Löwik CWGM, Hogg PJ. Optical Imaging of Treatment-Related Tumor Cell Death Using a Heat Shock Protein-90 Alkylator. Mol Pharm 2013; 10:3882-91. [DOI: 10.1021/mp4003464] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Danielle Park
- Lowy
Cancer Research Centre and Prince of Wales Clinical School, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Bang-Wen Xie
- Experimental
Molecular Imaging, Department of Radiology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Ermond R. Van Beek
- Experimental
Molecular Imaging, Department of Radiology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Vicky Blankevoort
- Experimental
Molecular Imaging, Department of Radiology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Ivo Que
- Experimental
Molecular Imaging, Department of Radiology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Clemens W. G. M. Löwik
- Experimental
Molecular Imaging, Department of Radiology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Philip J. Hogg
- Lowy
Cancer Research Centre and Prince of Wales Clinical School, University of New South Wales, Sydney, New South Wales 2052, Australia
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30
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Smith BA, Harmatys KM, Xiao S, Cole EL, Plaunt AJ, Wolter W, Suckow MA, Smith BD. Enhanced cell death imaging using multivalent zinc(II)-bis(dipicolylamine) fluorescent probes. Mol Pharm 2013; 10:3296-303. [PMID: 23915311 DOI: 10.1021/mp300720k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
There is a clinical need for imaging technologies that can accurately detect cell death in a multitude of pathological conditions. Zinc(II)-bis(dipicolylamine) (Zn2BDPA) coordination complexes are known to associate with the anionic phosphatidylserine that is exposed on the surface of dead and dying cells, and fluorescent monovalent Zn2BDPA probes are successful cell death imaging agents. This present study compared the membrane targeting ability of two structurally related deep-red fluorescent probes, bis-Zn2BDPA-SR and tetra-Zn2BDPA-SR, with two and four appended Zn2BDPA units, respectively. Vesicle and cell microscopy studies indicated that a higher number of Zn2BDPA targeting units improved probe selectivity for phosphatidylserine-rich vesicles, and increased probe localization at the plasma membrane of dead and dying cells. The fluorescent probes were also tested in three separate animal models, (1) necrotic prostate tumor rat model, (2) thymus atrophy mouse model, and (3) traumatic brain injury mouse model. In each case, there was more tetra-Zn2BDPA-SR accumulation at the site of cell death than bis-Zn2BDPA-SR. The results indicate that multivalent Zn2BDPA probes are promising molecules for effective imaging of cell death processes in cell culture and in living subjects.
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Affiliation(s)
- Bryan A Smith
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame , Notre Dame, Indiana 46556, United States
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O'Neil EJ, Jiang H, Smith BD. Effect of Bridging Anions on the Structure and Stability of Phenoxide Bridged Zinc Dipicolylamine Coordination Complexes. Supramol Chem 2013; 25:315-322. [PMID: 23914128 PMCID: PMC3728083 DOI: 10.1080/10610278.2013.776170] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A series of four related phenol derivatives, with 2,2'-dipicolylamine substituents at the ortho positions, were prepared and their Zn2+ coordination complexes studied by spectroscopic methods. X-ray crystal diffraction analysis of a dinuclear zinc complex with two bridging acetate anions showed a ternary structure with highly charged interior and lipophilic exterior, which helps explain why this class of water-soluble complexes can effectively diffuse through cell membranes. The stability of the dinuclear zinc complexes in aqueous solution was found to be strongly anion dependent; that is, bridging oxyanions, such as acetate and pyrophosphate, lock the two Zn2+ cations to the surrounding ligand and greatly enhance ligand/zinc affinity. Overall, the results provide new insight into the structural and mechanistic factors that control the recognition and chemosensing performance of phenoxide bridged dipicolylamine molecular probes.
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Affiliation(s)
- Edward J. O'Neil
- Department of Chemistry and Biochemistry, University of Notre Dame, 2365 Nieuwland Science Hall, Notre Dame, IN 46556
| | - Hua Jiang
- Department of Chemistry and Biochemistry, University of Notre Dame, 2365 Nieuwland Science Hall, Notre Dame, IN 46556
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Bradley D. Smith
- Department of Chemistry and Biochemistry, University of Notre Dame, 2365 Nieuwland Science Hall, Notre Dame, IN 46556
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Xiao S, Turkyilmaz S, Smith BD. Convenient Synthesis of Multivalent Zinc(II)-Dipicolylamine Complexes for Molecular Recognition. Tetrahedron Lett 2013; 54:861-864. [PMID: 23459472 PMCID: PMC3580864 DOI: 10.1016/j.tetlet.2012.11.103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A pair of novel dipicolylamine ligands bearing isothiocyanate groups were used as conjugation reagents to prepare multivalent molecules with anionic recognition capability. The isothiocyanates were reacted with two classes of dendritic scaffolds bearing primary amines, squaraine rotaxanes and PAMAM dendrimers, and the products were converted into water soluble zinc(II) coordination complexes. The multivalent squaraine rotaxanes exhibit high fluorescence quantum yields in water and are very well suited for biological imaging applications.
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Affiliation(s)
- Shuzhang Xiao
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Serhan Turkyilmaz
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Bradley D. Smith
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556, USA
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Smith BA, Smith BD. Biomarkers and molecular probes for cell death imaging and targeted therapeutics. Bioconjug Chem 2012; 23:1989-2006. [PMID: 22989049 DOI: 10.1021/bc3003309] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cell death is a critically important biological process. Disruption of homeostasis, either by excessive or deficient cell death, is a hallmark of many pathological conditions. Recent research advances have greatly increased our molecular understanding of cell death and its role in a range of diseases and therapeutic treatments. Central to these ongoing research and clinical efforts is the need for imaging technologies that can locate and identify cell death in a wide array of in vitro and in vivo biomedical samples with varied spatiotemporal requirements. This review article summarizes community efforts over the past five years to identify useful biomarkers for dead and dying cells, and to develop molecular probes that target these biomarkers for optical, radionuclear, or magnetic resonance imaging. Apoptosis biomarkers are classified as either intracellular (caspase enzymes, mitochondrial membrane potential, cytosolic proteins) or extracellular (plasma membrane phospholipids, membrane potential, surface exposed histones). Necrosis, autophagy, and senescence biomarkers are described, as well as unexplored cell death biomarkers. The article discusses possible chemotherapeutic and theranostic strategies, and concludes with a summary of current challenges and expected eventual rewards of clinical cell death imaging.
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Affiliation(s)
- Bryan A Smith
- Department of Chemistry and Biochemistry, Notre Dame Integrated Imaging Facility, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556, USA
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Plaunt AJ, Courbanou MB, Cuison KD, Harmatys KM, Smith BD. Selective non-covalent triggered release from liposomes. Chem Commun (Camb) 2012; 48:8123-5. [PMID: 22772732 PMCID: PMC3417318 DOI: 10.1039/c2cc32962j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A zinc(II)-dipicolylamine coordination complex selectively associates with anionic liposomes, including sterically protected PEGylated liposomes, and causes rapid leakage of encapsulated contents.
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Affiliation(s)
| | | | | | | | - Bradley D. Smith
- Department of Chemistry and Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN, USA
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Smith BA, Xie BW, van Beek ER, Que I, Blankevoort V, Xiao S, Cole EL, Hoehn M, Kaijzel EL, Löwik CWGM, Smith BD. Multicolor fluorescence imaging of traumatic brain injury in a cryolesion mouse model. ACS Chem Neurosci 2012; 3:530-7. [PMID: 22860222 DOI: 10.1021/cn3000197] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 04/07/2012] [Indexed: 12/20/2022] Open
Abstract
Traumatic brain injury is characterized by initial tissue damage, which then can lead to secondary processes such as cell death and blood-brain-barrier disruption. Clinical and preclinical studies of traumatic brain injury typically employ anatomical imaging techniques and there is a need for new molecular imaging methods that provide complementary biochemical information. Here, we assess the ability of a targeted, near-infrared fluorescent probe, named PSS-794, to detect cell death in a brain cryolesion mouse model that replicates certain features of traumatic brain injury. In short, the model involves brief contact of a cold rod to the head of a living, anesthetized mouse. Using noninvasive whole-body fluorescence imaging, PSS-794 permitted visualization of the cryolesion in the living animal. Ex vivo imaging and histological analysis confirmed PSS-794 localization to site of brain cell death. The nontargeted, deep-red Tracer-653 was validated as a tracer dye for monitoring blood-brain-barrier disruption, and a binary mixture of PSS-794 and Tracer-653 was employed for multicolor imaging of cell death and blood-brain-barrier permeability in a single animal. The imaging data indicates that at 3 days after brain cryoinjury the amount of cell death had decreased significantly, but the integrity of the blood-brain-barrier was still impaired; at 7 days, the blood-brain-barrier was still three times more permeable than before cryoinjury.
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Affiliation(s)
- Bryan A. Smith
- Department of Chemistry and
Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Bang-Wen Xie
- Molecular Endocrinology and
Molecular Imaging, Department of Endocrinology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden,
The Netherlands
| | - Ermond R. van Beek
- Molecular Endocrinology and
Molecular Imaging, Department of Endocrinology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden,
The Netherlands
| | - Ivo Que
- Molecular Endocrinology and
Molecular Imaging, Department of Endocrinology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden,
The Netherlands
| | - Vicky Blankevoort
- Molecular Endocrinology and
Molecular Imaging, Department of Endocrinology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden,
The Netherlands
| | - Shuzhang Xiao
- Department of Chemistry and
Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Erin L. Cole
- Department of Chemistry and
Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mathias Hoehn
- Max Planck Institute for Neurological Research, Gleuelerstrasse 50, D-50931,
Cologne, Germany
| | - Eric L. Kaijzel
- Molecular Endocrinology and
Molecular Imaging, Department of Endocrinology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden,
The Netherlands
| | - Clemens W. G. M. Löwik
- Molecular Endocrinology and
Molecular Imaging, Department of Endocrinology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden,
The Netherlands
| | - Bradley D. Smith
- Department of Chemistry and
Biochemistry, 236 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, United States
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Demchenko AP. Beyond annexin V: fluorescence response of cellular membranes to apoptosis. Cytotechnology 2012; 65:157-72. [PMID: 22797774 DOI: 10.1007/s10616-012-9481-y] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 06/24/2012] [Indexed: 02/07/2023] Open
Abstract
Dramatic changes in the structure of cell membranes on apoptosis allow easy, sensitive and non-destructive analysis of this process with the application of fluorescence methods. The strong plasma membrane asymmetry is present in living cells, and its loss on apoptosis is commonly detected with the probes interacting strongly and specifically with phosphatidylserine (PS). This phospholipid becomes exposed to the cell surface, and the application of annexin V labeled with fluorescent dye is presently the most popular tool for its detection. Several methods have been suggested recently that offer important advantages over annexin V assay with the ability to study apoptosis by spectroscopy of cell suspensions, flow cytometry and confocal or two-photon microscopy. The PS exposure marks the integrated changes in the outer leaflet of cell membrane that involve electrostatic potential and hydration, and the attempts are being made to provide direct probing of these changes. This review describes the basic mechanisms underlying the loss of membrane asymmetry during apoptosis and discusses, in comparison with the annexin V-binding assay, the novel fluorescence techniques of detecting apoptosis on cellular membrane level. In more detail we describe the detection method based on smart fluorescent dye F2N12S incorporated into outer leaflet of cell membrane and reporting on apoptotic cell transformation by easily detectable change of the spectral distribution of fluorescent emission. It can be adapted to any assay format.
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Affiliation(s)
- Alexander P Demchenko
- Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kiev, 01030, Ukraine,
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Li J, Gray BD, Pak KY, Ng CK. Optimization of labeling dipicolylamine derivative, N,N'-(5-(4-aminobutoxy)-1,3-phenylene)bis(methylene)bis(1-(pyridin-2-yl)-N-(pyridin-2-ylmethyl)methanamine), with three 18F-prosthetic groups as potential imaging agents for metastatic infectious disease. J Labelled Comp Radiopharm 2012. [DOI: 10.1002/jlcr.2911] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Junling Li
- Department of Diagnostic Radiology; University of Louisville; Louisville; KY; USA
| | - Brian D. Gray
- Molecular Targeting Technologies, Inc.; West Chester; PA; USA
| | - Koon Y Pak
- Molecular Targeting Technologies, Inc.; West Chester; PA; USA
| | - Chin K. Ng
- Department of Diagnostic Radiology; University of Louisville; Louisville; KY; USA
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Bioactive component, cantharidin from Mylabris cichorii and its antitumor activity against Ehrlich ascites carcinoma. Cell Biol Toxicol 2012; 28:133-47. [DOI: 10.1007/s10565-011-9206-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 12/01/2011] [Indexed: 10/28/2022]
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39
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Scott JL, Musselman CA, Adu-Gyamfi E, Kutateladze TG, Stahelin RV. Emerging methodologies to investigate lipid-protein interactions. Integr Biol (Camb) 2012; 4:247-58. [PMID: 22327461 DOI: 10.1039/c2ib00143h] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Cellular membranes are composed of hundreds of different lipids, ion channels, receptors and scaffolding complexes that act as signalling and trafficking platforms for processes fundamental to life. Cellular signalling and membrane trafficking are often regulated by peripheral proteins, which reversibly interact with lipid molecules in highly regulated spatial and temporal fashions. In most cases, one or more modular lipid-binding domain(s) mediate recruitment of peripheral proteins to specific cellular membranes. These domains, of which more than 10 have been identified since 1989, harbour structurally selective lipid-binding sites. Traditional in vitro and in vivo studies have elucidated how these domains coordinate their cognate lipids and thus how the parent proteins associate with membranes. Cellular activities of peripheral proteins and subsequent physiological processes depend upon lipid binding affinities and selectivity. Thus, the development of novel sensitive and quantitative tools is essential in furthering our understanding of the function and regulation of these proteins. As this field expands into new areas such as computational biology, cellular lipid mapping, single molecule imaging, and lipidomics, there is an urgent need to integrate technologies to detail the molecular architecture and mechanisms of lipid signalling. This review surveys emerging cellular and in vitro approaches for studying protein-lipid interactions and provides perspective on how integration of methodologies directs the future development of the field.
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Affiliation(s)
- Jordan L Scott
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
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