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Tian F, Guo RC, Wu C, Liu X, Zhang Z, Wang Y, Wang H, Li G, Yu Z. Assembly of Glycopeptides in Living Cells Resembling Viral Infection for Cargo Delivery. Angew Chem Int Ed Engl 2024; 63:e202404703. [PMID: 38655625 DOI: 10.1002/anie.202404703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/18/2024] [Accepted: 04/22/2024] [Indexed: 04/26/2024]
Abstract
Self-assembly in living cells represents one versatile strategy for drug delivery; however, it suffers from the limited precision and efficiency. Inspired by viral traits, we here report a cascade targeting-hydrolysis-transformation (THT) assembly of glycosylated peptides in living cells holistically resembling viral infection for efficient cargo delivery and combined tumor therapy. We design a glycosylated peptide via incorporating a β-galactose-serine residue into bola-amphiphilic sequences. Co-assembling of the glycosylated peptide with two counterparts containing irinotecan (IRI) or ligand TSFAEYWNLLSP (PMI) results in formation of the glycosylated co-assemblies SgVEIP, which target cancer cells via β-galactose-galectin-1 association and undergo galactosidase-induced morphological transformation. While GSH-reduction causes release of IRI from the co-assemblies, the PMI moieties release p53 and facilitate cell death via binding with protein MDM2. Cellular experiments show membrane targeting, endo-/lysosome-mediated internalization and in situ formation of nanofibers in cytoplasm by SgVEIP. This cascade THT process enables efficient delivery of IRI and PMI into cancer cells secreting Gal-1 and overexpressing β-galactosidase. In vivo studies illustrate enhanced tumor accumulation and retention of the glycosylated co-assemblies, thereby suppressing tumor growth. Our findings demonstrate an in situ assembly strategy mimicking viral infection, thus providing a new route for drug delivery and cancer therapy in the future.
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Affiliation(s)
- Feng Tian
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Ruo-Chen Guo
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Chunxia Wu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Xin Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Zeyu Zhang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Yamei Wang
- State Key Laboratory of Medicinal Chemical Biology, Research Center for Analytical Science and Tianjin Key Laboratory of Biosensing and Molecular Recognition, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Hao Wang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Gongyu Li
- State Key Laboratory of Medicinal Chemical Biology, Research Center for Analytical Science and Tianjin Key Laboratory of Biosensing and Molecular Recognition, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Zhilin Yu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
- Haihe Laboratory of Synthetic Biology, 21 West 15th Avenue, Tianjin, 300308, China
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2
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Hu Y, Luo H, Zhao L, Guo X, Wang S, Hu R, Yang G. A chalcone-based ESIPT and AIE fluorophore for β-gal imaging in living cells. Org Biomol Chem 2024; 22:1850-1858. [PMID: 38345427 DOI: 10.1039/d3ob01953e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
β-Galactosidase (β-gal), which is responsible for the hydrolysis of the glycosidic bond of lactose to galactose, has been recognized as an important biomarker of cell or organism status, especially cell senescence and primary ovarian cancer. Extensive efforts have been devoted to develop probes for detecting and visualizing β-gal in cells. Herein, a fluorescent probe gal-HCA which possesses both excited-state intramolecular proton transfer (ESIPT) and aggregation-induced emission (AIE) properties was prepared to monitor β-gal in living cells. The probe consists of 2-hydroxy-4'-dimethylamino-chalcone (HCA) capped with a D-galactose group. The cleavage of the glycosidic bond in gal-HCA triggered by β-gal releases HCA, which results in a significant bathochromic shift in fluorescence from 532 to 615 nm. The probe exhibited high selectivity and sensitivity toward β-gal with a detection limit as low as 0.0122 U mL-1. The confocal imaging investigation demonstrated the potential of gal-HCA in monitoring the endocellular overexpressed β-gal in senescent cells and ovarian cancer cells. This study provides a straightforward approach for the development of fluorescent probes to monitor β-gal and detection of β-gal-associated diseases.
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Affiliation(s)
- Yiran Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China.
| | - Haiyan Luo
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China.
| | - Luyao Zhao
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China.
| | - Xudong Guo
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China.
| | - Shuangqing Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China.
| | - Rui Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China.
| | - Guoqiang Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China.
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Li L, Jia F, Li Y, Peng Y. Design strategies and biological applications of β-galactosidase fluorescent sensor in ovarian cancer research and beyond. RSC Adv 2024; 14:3010-3023. [PMID: 38239445 PMCID: PMC10795002 DOI: 10.1039/d3ra07968f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 01/10/2024] [Indexed: 01/22/2024] Open
Abstract
Beta-galactosidase (β-galactosidase), a lysosomal hydrolytic enzyme, plays a critical role in the catalytic hydrolysis of glycosidic bonds, leading to the conversion of lactose into galactose. This hydrolytic enzyme is used as a biomarker in various applications, including enzyme-linked immunosorbent assays (ELISAs), gene expression studies, tuberculosis classification, and in situ hybridization. β-Galactosidase abnormalities are linked to various diseases, such as ganglioside deposition, primary ovarian cancer, and cell senescence. Thus, effective detection of β-galactosidase activity may aid disease diagnoses and treatment. Activatable optical probes with high sensitivity, specificity, and spatiotemporal resolution imaging capabilities have become powerful tools for visualization and real time tracking in vivo in the past decade. This manuscript reviews the sensing mechanism, molecular design strategies, and advances of fluorescence probes in the biological application of β-galactosidase, particularly in the field of ovarian cancer research. Current challenges in tracking β-galactosidase and future directions are also discussed.
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Affiliation(s)
- Liangliang Li
- Shenzhen Longhua District Central Hospital Guangzhou 518000 People's Republic of China
| | - Feifei Jia
- Shenzhen Longhua District Central Hospital Guangzhou 518000 People's Republic of China
| | - Yunxiu Li
- Shenzhen Longhua District Central Hospital Guangzhou 518000 People's Republic of China
| | - Yan Peng
- Shenzhen Longhua District Central Hospital Guangzhou 518000 People's Republic of China
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Wu Q, Zhou QH, Li W, Ren TB, Zhang XB, Yuan L. Evolving an Ultra-Sensitive Near-Infrared β-Galactosidase Fluorescent Probe for Breast Cancer Imaging and Surgical Resection Navigation. ACS Sens 2022; 7:3829-3837. [PMID: 36383027 DOI: 10.1021/acssensors.2c01752] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Early diagnosis and therapy are clinically crucial in decreasing mortality from breast carcinoma. However, the existing probes have difficulty in accurately identifying the margins and contours of breast carcinoma due to poor sensitivity and specificity. There is an urgent need to develop high-sensitive fluorescent probes for the diagnosis of breast carcinoma and for differentiating tumors from normal tissues during surgery. β-Galactosidase is a significant biomarker, whose overexpression is closely associated with the progression of breast tumors. Herein, we have constructed a β-galactosidase-activated fluorescent probe NIR-βgal-2 through rational design and molecular docking engineering simulations. The probe displayed superior sensitivity (detection limit = 2.0 × 10-3 U/mL), great affinity (Km = 1.84 μM), and catalytic efficiency (kcat/Km = 0.24 μM-1 s-1) for β-galactosidase. Leveraging this probe, we demonstrated the differentiation of cancer cells overexpressing β-galactosidase from normal cells and then applied the probe for intraoperative guided excision of breast tumors. Moreover, we exhibited the application of NIR-βgal-2 for the successful resection of orthotopic breast tumors by "in situ spraying" and monitored a good prognostic recovery. This work may promote the application of enzyme-activated near-infrared fluorescent probes for the development of carcinoma diagnosis and image-guided surgery.
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Affiliation(s)
- Qian Wu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Qian-Hui Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Wei Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Tian-Bing Ren
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Xiao-Bing Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Lin Yuan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
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Senescence-Associated β-Galactosidase Detection in Pathology. Diagnostics (Basel) 2022; 12:diagnostics12102309. [PMID: 36291998 PMCID: PMC9599972 DOI: 10.3390/diagnostics12102309] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/08/2022] [Accepted: 09/21/2022] [Indexed: 11/22/2022] Open
Abstract
Activity of β-galactosidase at pH 6 is a classic maker of senescence in cellular biology. Cellular senescence, a state of highly stable cell cycle arrest, is often compared to apoptosis as an intrinsic tumor suppression mechanism. It is also thought that SA-β-gal is crucial in malignant cell transformation. High levels of senescence-associated β-galactosidase (SA-β-gal) can be found in cancer and benign lesions of various localizations making the enzyme a highly promising diagnostic marker for visualization of tumor margins and metastases. These findings facilitate the research of therapy induced senescence as a promising therapeutic strategy. In this review, we address the need to collect and analyze the bulk of clinical and biological data on SA-β-gal mechanisms of action to support wider implementation of this enzyme in medical diagnostics. The review will be of interest to pathologists, biologists, and biotechnologists investigating cellular senescence for purposes of regenerative medicine and oncology.
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Rosa-Fernandes L, Oba-Shinjo SM, Macedo-da-Silva J, Marie SKN, Palmisano G. Aberrant Protein Glycosylation in Brain Cancers, with Emphasis on Glioblastoma. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1382:39-70. [DOI: 10.1007/978-3-031-05460-0_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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Martin H, Lázaro LR, Gunnlaugsson T, Scanlan EM. Glycosidase activated prodrugs for targeted cancer therapy. Chem Soc Rev 2022; 51:9694-9716. [DOI: 10.1039/d2cs00379a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this review glycosidase activated prodrugs that target cancer cells are discussed.
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Affiliation(s)
- Harlei Martin
- School of Chemistry and Trinity Bioscience Institute, The University of Dublin, Trinity College Dublin, Dublin 2, Ireland
| | - Laura Ramírez Lázaro
- School of Chemistry and Trinity Bioscience Institute, The University of Dublin, Trinity College Dublin, Dublin 2, Ireland
- SFI Synthesis and Solid State Pharmaceutical Centre (SSPC), Ireland
| | - Thorfinnur Gunnlaugsson
- School of Chemistry and Trinity Bioscience Institute, The University of Dublin, Trinity College Dublin, Dublin 2, Ireland
- SFI Synthesis and Solid State Pharmaceutical Centre (SSPC), Ireland
| | - Eoin M. Scanlan
- School of Chemistry and Trinity Bioscience Institute, The University of Dublin, Trinity College Dublin, Dublin 2, Ireland
- SFI Synthesis and Solid State Pharmaceutical Centre (SSPC), Ireland
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Zhang Y, Zhang G, Zeng Z, Pu K. Activatable molecular probes for fluorescence-guided surgery, endoscopy and tissue biopsy. Chem Soc Rev 2021; 51:566-593. [PMID: 34928283 DOI: 10.1039/d1cs00525a] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The real-time, dynamic optical visualization of lesions and margins ensures not only complete resection of the malignant tissues but also better preservation of the vital organs/tissues during surgical procedures. Most imaging probes with an "always-on" signal encounter high background noise due to their non-specific accumulation in normal tissues. By contrast, activatable molecular probes only "turn on" their signals upon reaction with the targeted biomolecules that are overexpressed in malignant cells, offering high target-to-background ratios with high specificity and sensitivity. This review summarizes the recent progress of activatable molecular probes in surgical imaging and diagnosis. The design principle and mechanism of activatable molecular probes are discussed, followed by specific emphasis on applications ranging from fluorescence-guided surgery to endoscopy and tissue biopsy. Finally, potential challenges and perspectives in the field of activatable molecular probe-enabled surgical imaging are discussed.
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Affiliation(s)
- Yan Zhang
- National Engineering Research Centre for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.,Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medical, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guopeng Zhang
- Department of Nuclear Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. China
| | - Ziling Zeng
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637457, Singapore
| | - Kanyi Pu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637457, Singapore
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9
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Lee HW, Juvekar V, Lee DJ, Kim SM, Kim HM. Highly Stable Red-Emissive Ratiometric Probe for Monitoring β-Galactosidase Activity Using Fluorescence Microscopy and Flow Cytometry. Anal Chem 2021; 93:14778-14783. [PMID: 34705435 DOI: 10.1021/acs.analchem.1c03453] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
β-Galactosidase (β-gal), well known as a useful reporter enzyme, is a potent biomarker for various diseases such as colorectal and ovarian cancers. We have developed a highly stable red-emissive ratiometric fluorescent probe (CCGal1) for quantitatively monitoring the β-gal enzyme activity in live cells and tissues. This ratiometric probe showed a fast emission color change (620-662 nm) in response to β-gal selectively, which was accompanied by high enzyme reaction efficacy, cell-staining ability, and outstanding stability with minimized cytotoxicity. Confocal fluorescence microscopy ratiometric images, combined with fluorescence-activated cell sorting flow cytometry, demonstrated that CCGal1 could provide useful information for the diagnosis, prognosis, and treatment of β-gal enzyme activity-related diseases such as colorectal and ovarian cancers. Further, it may yield meaningful strategies for designing and modifying multifunctional bioprobes with different biomedical applications.
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Affiliation(s)
- Hyo Won Lee
- Department of Energy Systems Research and Department of Chemistry, Ajou University, Suwon 16499, Korea
| | - Vinayak Juvekar
- Department of Energy Systems Research and Department of Chemistry, Ajou University, Suwon 16499, Korea
| | - Dong Joon Lee
- Department of Energy Systems Research and Department of Chemistry, Ajou University, Suwon 16499, Korea
| | - Sun Mi Kim
- Department of Energy Systems Research and Department of Chemistry, Ajou University, Suwon 16499, Korea
| | - Hwan Myung Kim
- Department of Energy Systems Research and Department of Chemistry, Ajou University, Suwon 16499, Korea
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Ogawa S, Kubo H, Murayama Y, Kubota T, Yubakami M, Matsumoto T, Yamamoto Y, Morimura R, Ikoma H, Okamoto K, Kamiya M, Urano Y, Otsuji E. Rapid fluorescence imaging of human hepatocellular carcinoma using the β-galactosidase-activatable fluorescence probe SPiDER-βGal. Sci Rep 2021; 11:17946. [PMID: 34504174 PMCID: PMC8429424 DOI: 10.1038/s41598-021-97073-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 08/17/2021] [Indexed: 12/11/2022] Open
Abstract
Fluorescence imaging of tumours facilitates rapid intraoperative diagnosis. Thus far, a promising activatable fluorescence probe for hepatocellular carcinoma (HCC) has not been developed. Herein, the utility of the fluorescence imaging of HCC using a β-galactosidase (β-Gal)-activatable fluorescence probe SPiDER-βGal was examined. β-Gal activity was measured in cryopreserved tissues from 68 patients. Live cell imaging of HCC cell lines and imaging of tumour-bearing model mice were performed using SPiDER-βGal. Furthermore, fluorescence imaging was performed in 27 freshly resected human HCC specimens. In cryopreserved samples, β-Gal activity was significantly higher in tumour tissues than in non-tumour tissues. Fluorescence was observed in HCC cell lines. In mouse models, tumours displayed stronger fluorescence than normal liver tissue. In freshly resected specimens, fluorescence intensity in the tumour was significantly higher than that in non-tumour liver specimens as early as 2 min after spraying. Receiver operating characteristic curves were generated to determine the diagnostic value of SPiDER-βGal 10 min after its spraying; an area under the curve of 0.864, sensitivity of 85.2%, and specificity of 74.1% were observed for SPiDER-βGal. SPiDER-βGal is useful for the rapid fluorescence imaging of HCC. Fluorescence imaging guided by SPiDER-βGal would help surgeons detect tumours rapidly and achieve complete liver resection.
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Affiliation(s)
- Soichiro Ogawa
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Hidemasa Kubo
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan.
| | - Yasutoshi Murayama
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Takeshi Kubota
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Masayuki Yubakami
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Tatsuya Matsumoto
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Yusuke Yamamoto
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Ryo Morimura
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Hisashi Ikoma
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Kazuma Okamoto
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Mako Kamiya
- Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yasuteru Urano
- Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- CREST (Japan) Agency for Medical Research and Development (AMED), 1-7-1 Otemachi, Chiyoda-ku, Tokyo, 100-0004, Japan
| | - Eigo Otsuji
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto, 602-8566, Japan
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11
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Wang Y, Mu S, Li S, Fu G, Liu X, Gao H, Zhang H. A fluorescent probe for bioimaging of Hexosaminidases activity and exploration of drug-induced kidney injury in living cell. Talanta 2021; 228:122189. [PMID: 33773709 DOI: 10.1016/j.talanta.2021.122189] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 01/11/2021] [Accepted: 01/30/2021] [Indexed: 02/06/2023]
Abstract
Hexosaminidases (Hexs) as an exoglycosidase participates in the catalytic hydrolysis of non-reducing end of glycoconjugates in the biological system. The fluctuation of Hexs level could cause many hereditary neurodegenerative diseases such as Tay-Sachs and Sandhoff. The Hexs activity is significantly up-regulated in colorectal cancer and kidney injury tissue so that it is particularly important to construct a fluorescent probe with significant signal change to understand its physiological role. In this work, DyOH was selected as fluorophore scaffolds to synthesize probe Hex-1 for detection of Hexs with good water solubility, high specificity, large stokes shift and quick response. Hex-1 can sensitively detect Hexs with the low detection limit (0.025 mU mL-1) in vitro by "naked eye" due to superior spectral properties of DyOH. Furthermore, Hex-1 was not only employed for imaging Hexs in living cells with low toxicity, but also successfully applied to evaluate the fluctuation of Hexs activity during drug induced kindey injury in living HK-2 cells. These results indicated that Hex-1 could be used as a potential image tool to further explore the pathogenesis of kidney disease and cancer.
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Affiliation(s)
- Yaya Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Shuai Mu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Shuangqin Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Guoqing Fu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Xiaoyan Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Hong Gao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
| | - Haixia Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
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12
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β-Galactosidase is a target enzyme for detecting peritoneal metastasis of gastric cancer. Sci Rep 2021; 11:10664. [PMID: 34021168 PMCID: PMC8139979 DOI: 10.1038/s41598-021-88982-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 04/19/2021] [Indexed: 12/23/2022] Open
Abstract
Diagnosis of peritoneal metastasis in gastric cancer (GC) is essential for determining appropriate therapeutic strategies and avoiding non-essential laparotomy or gastrectomy. Recently, a variety of activatable fluorescence probes that can detect enzyme activities have been developed for cancer imaging. The aim of this study was to identify the key enzyme involved in peritoneal metastasis in GC. The enzymatic activity of gamma-glutamyl transpeptidase, dipeptidyl peptidase IV, and β-galactosidase (β-Gal) was assessed in lysates prepared from preserved human GC (n = 89) and normal peritoneal (NP; n = 20) samples. β-Gal activity was significantly higher in the human GC samples than in NP samples, whereas no differences were observed in the activities of the other enzymes. Therefore, we used SPiDER-βGal, a fluorescent probe that can be activated by β-Gal, for imaging GC cell lines, peritoneal metastasis in a mouse model, and fresh human resected GC samples (n = 13). All cell lines showed fluorescence after applying SPiDER-βGal, and metastatic nodules in the mice gradually developed high fluorescence that could be visualized with SPiDER-βGal. The human GC samples showed significantly higher fluorescence than NP samples. β-Gal is a useful target enzyme for fluorescence imaging of peritoneal metastasis in GC.
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13
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Fujita K, Kamiya M, Yoshioka T, Ogasawara A, Hino R, Kojima R, Ueo H, Urano Y. Rapid and Accurate Visualization of Breast Tumors with a Fluorescent Probe Targeting α-Mannosidase 2C1. ACS CENTRAL SCIENCE 2020; 6:2217-2227. [PMID: 33376783 PMCID: PMC7760471 DOI: 10.1021/acscentsci.0c01189] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Indexed: 05/21/2023]
Abstract
Accurate detection of breast tumors and discrimination of tumor from normal tissues during breast-conserving surgery are essential to reduce the risk of misdiagnosis or recurrence. However, existing probes show substantial background signals in normal breast tissues. In this study, we focus on glycosidase activities in breast tumors. We synthesized a series of 12 fluorescent probes and performed imaging-based evaluation on surgically resected human breast specimens. Among them, the α-mannosidase-reactive fluorescent probe HMRef-αMan detected breast cancer with 90% sensitivity and 100% specificity. We identified α-mannosidase 2C1 as the target enzyme and confirmed its overexpression in various breast tumors. We found that fibroadenoma, the most common benign breast lesion in young woman, tends to have higher α-mannosidase 2C1 activity than malignant cancer. Combined application of green-emitting HMRef-αMan and a red-emitting γ-glutamyltranspeptidase probe enabled efficient dual-color, dual-target optical discrimination of malignant and benign tumors.
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Affiliation(s)
- Kyohhei Fujita
- Graduate School of Medicine and Graduate School
of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Mako Kamiya
- Graduate School of Medicine and Graduate School
of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- PRESTO,
Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Takafusa Yoshioka
- Graduate School of Medicine and Graduate School
of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Akira Ogasawara
- Graduate School of Medicine and Graduate School
of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Rumi Hino
- Daito
Bunka University, Department of Sports and
Health Science, 560 Iwadono, Higashimatsuyama, Saitama 355-8501, Japan
| | - Ryosuke Kojima
- Graduate School of Medicine and Graduate School
of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- PRESTO,
Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hiroaki Ueo
- Ueo
Breast Cancer Hospital, 1-3-5 Futamatacho, Oita, Oita 870-0887, Japan
| | - Yasuteru Urano
- Graduate School of Medicine and Graduate School
of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- CREST,
Japan
Agency for Medical Research and Development, 1-7-1 Otemachi, Chiyoda,
Tokyo 100-0004, Japan
- E-mail
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14
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Baillet J, Gaubert A, Verget J, Latxague L, Barthélémy P. β-Galactosidase instructed self-assembly of supramolecular bolaamphiphiles hydrogelators. SOFT MATTER 2020; 16:7648-7651. [PMID: 32657300 DOI: 10.1039/d0sm01055c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
β-Galactosidase instructed supramolecular assemblies of Low Molecular Weight Gelators (LMWGs) derived from glyconucleo-bolaamphiphiles have been designed. These precursors, comprising galactose sensitive units at both polar heads, showed the formation of hydrogels upon the action of β-galactosidase.
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Affiliation(s)
- Julie Baillet
- University of Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France.
| | - Alexandra Gaubert
- University of Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France.
| | - Julien Verget
- University of Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France.
| | - Laurent Latxague
- University of Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France.
| | - Philippe Barthélémy
- University of Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France.
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15
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Lou J, Best MD. A General Approach to Enzyme‐Responsive Liposomes. Chemistry 2020; 26:8597-8607. [DOI: 10.1002/chem.202000529] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/14/2020] [Indexed: 01/06/2023]
Affiliation(s)
- Jinchao Lou
- Department of Chemistry University of Tennessee 1420 Circle Drive Knoxville TN 37996 USA
| | - Michael D. Best
- Department of Chemistry University of Tennessee 1420 Circle Drive Knoxville TN 37996 USA
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16
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Mensah SA, Nersesyan AA, Harding IC, Lee CI, Tan X, Banerjee S, Niedre M, Torchilin VP, Ebong EE. Flow-regulated endothelial glycocalyx determines metastatic cancer cell activity. FASEB J 2020; 34:6166-6184. [PMID: 32167209 DOI: 10.1096/fj.201901920r] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 01/30/2020] [Accepted: 02/22/2020] [Indexed: 12/14/2022]
Abstract
Cancer metastasis and secondary tumor initiation largely depend on circulating tumor cell (CTC) and vascular endothelial cell (EC) interactions by incompletely understood mechanisms. Endothelial glycocalyx (GCX) dysfunction may play a significant role in this process. GCX structure depends on vascular flow patterns, which are irregular in tumor environments. This work presents evidence that disturbed flow (DF) induces GCX degradation, leading to CTC homing to the endothelium, a first step in secondary tumor formation. A 2-fold greater attachment of CTCs to human ECs was found to occur under DF conditions, compared to uniform flow (UF) conditions. These results corresponded to an approximately 50% decrease in wheat germ agglutinin (WGA)-labeled components of the GCX under DF conditions, vs UF conditions, with undifferentiated levels of CTC-recruiting E-selectin under DF vs UF conditions. Confirming the role of the GCX, neuraminidase induced the degradation of WGA-labeled GCX under UF cell culture conditions or in Balb/C mice and led to an over 2-fold increase in CTC attachment to ECs or Balb/C mouse lungs, respectively, compared to untreated conditions. These experiments confirm that flow-induced GCX degradation can enable metastatic CTC arrest. This work, therefore, provides new insight into pathways of secondary tumor formation.
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Affiliation(s)
- Solomon A Mensah
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Alina A Nersesyan
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Ian C Harding
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Claire I Lee
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Xuefei Tan
- Department of Electrical and Computer Engineering, Northeastern University, Boston, MA, USA
| | - Selina Banerjee
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Mark Niedre
- Department of Bioengineering, Northeastern University, Boston, MA, USA.,Department of Electrical and Computer Engineering, Northeastern University, Boston, MA, USA
| | | | - Eno E Ebong
- Department of Bioengineering, Northeastern University, Boston, MA, USA.,Department of Chemical Engineering, Northeastern University, Boston, MA, USA.,Neuroscience Department, Albert Einstein College of Medicine, New York, NY, USA
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17
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Roy S, Kumar R, Mittal V, Gupta D. Classification models for Invasive Ductal Carcinoma Progression, based on gene expression data-trained supervised machine learning. Sci Rep 2020; 10:4113. [PMID: 32139710 PMCID: PMC7057992 DOI: 10.1038/s41598-020-60740-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 02/12/2020] [Indexed: 12/20/2022] Open
Abstract
Early detection of breast cancer and its correct stage determination are important for prognosis and rendering appropriate personalized clinical treatment to breast cancer patients. However, despite considerable efforts and progress, there is a need to identify the specific genomic factors responsible for, or accompanying Invasive Ductal Carcinoma (IDC) progression stages, which can aid the determination of the correct cancer stages. We have developed two-class machine-learning classification models to differentiate the early and late stages of IDC. The prediction models are trained with RNA-seq gene expression profiles representing different IDC stages of 610 patients, obtained from The Cancer Genome Atlas (TCGA). Different supervised learning algorithms were trained and evaluated with an enriched model learning, facilitated by different feature selection methods. We also developed a machine-learning classifier trained on the same datasets with training sets reduced data corresponding to IDC driver genes. Based on these two classifiers, we have developed a web-server Duct-BRCA-CSP to predict early stage from late stages of IDC based on input RNA-seq gene expression profiles. The analysis conducted by us also enables deeper insights into the stage-dependent molecular events accompanying IDC progression. The server is publicly available at http://bioinfo.icgeb.res.in/duct-BRCA-CSP.
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Affiliation(s)
- Shikha Roy
- International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Rakesh Kumar
- International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Vaibhav Mittal
- International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Dinesh Gupta
- International Centre for Genetic Engineering and Biotechnology, New Delhi, India.
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18
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Chen Z, Chen M, Cheng Y, Kowada T, Xie J, Zheng X, Rao J. Exploring the Condensation Reaction between Aromatic Nitriles and Amino Thiols To Optimize In Situ Nanoparticle Formation for the Imaging of Proteases and Glycosidases in Cells. Angew Chem Int Ed Engl 2020; 59:3272-3279. [PMID: 31828913 DOI: 10.1002/anie.201913314] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Indexed: 12/31/2022]
Abstract
The condensation reaction between 6-hydroxy-2-cyanobenzothiazole (CBT) and cysteine has been shown for various applications such as site-specific protein labelling and in vivo cancer imaging. This report further expands the substrate scope of this reaction by varying the substituents on aromatic nitriles and amino thiols and testing their reactivity and ability to form nanoparticles for cell imaging. The structure-activity relationship study leads to the identification of the minimum structural requirement for the macrocyclization and assembly process in forming nanoparticles. One of the scaffolds made of 2-pyrimidinecarbonitrile and cysteine joined by a benzyl linker was applied to design fluorescent probes for imaging caspase-3/7 and β-galactosidase activity in live cells. These results demonstrate the generality of this system for imaging hydrolytic enzymes.
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Affiliation(s)
- Zixin Chen
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Min Chen
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Yunfeng Cheng
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Toshiyuki Kowada
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
| | - Jinghang Xie
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Xianchuang Zheng
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Jianghong Rao
- Departments of Radiology and Chemistry, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA, 94305, USA
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19
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Chen Z, Chen M, Cheng Y, Kowada T, Xie J, Zheng X, Rao J. Exploring the Condensation Reaction between Aromatic Nitriles and Amino Thiols To Optimize In Situ Nanoparticle Formation for the Imaging of Proteases and Glycosidases in Cells. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913314] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zixin Chen
- Departments of Radiology and Chemistry Molecular Imaging Program at Stanford Stanford University School of Medicine Stanford CA 94305 USA
| | - Min Chen
- Departments of Radiology and Chemistry Molecular Imaging Program at Stanford Stanford University School of Medicine Stanford CA 94305 USA
| | - Yunfeng Cheng
- Departments of Radiology and Chemistry Molecular Imaging Program at Stanford Stanford University School of Medicine Stanford CA 94305 USA
| | - Toshiyuki Kowada
- Institute of Multidisciplinary Research for Advanced Materials Tohoku University 2-1-1 Katahira, Aoba-ku Sendai Miyagi 980-8577 Japan
| | - Jinghang Xie
- Departments of Radiology and Chemistry Molecular Imaging Program at Stanford Stanford University School of Medicine Stanford CA 94305 USA
| | - Xianchuang Zheng
- Departments of Radiology and Chemistry Molecular Imaging Program at Stanford Stanford University School of Medicine Stanford CA 94305 USA
| | - Jianghong Rao
- Departments of Radiology and Chemistry Molecular Imaging Program at Stanford Stanford University School of Medicine Stanford CA 94305 USA
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20
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Wang Q, Li C, Chen Q, Zhang P, Wang D, Kang M, Jiang G, Wang J. Lysosome-Targeting Red-Emitting Aggregation-Induced Emission Probe with Large Stokes Shift for Light-Up in Situ Visualization of β- N-Acetylhexosaminidase. Anal Chem 2019; 91:12611-12614. [PMID: 31558016 DOI: 10.1021/acs.analchem.9b03832] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Lysosomal β-N-acetylhexosaminidase (Hex) has been reported to possess unique physiological performances. Detection and visualization of Hex in lysosome will be favorable to reveal the basis of its functions. However, Hex-specific fluorescent probes are rarely reported. In this study, we reported the first lysosome-targeting Hex-lighting-up aggregation-induced emission (AIE)-active fluorescent probe (GlcNAc-TPE) with remarkably large Stokes shift and high sensitivity and selectivity. GlcNAc-TPE can selectively locate in lysosome and visualize endogenous Hex in live HCT116 cells and in live mice with high stability and good biocompatibility, providing a useful AIE probe for real-time visualization of Hex in live samples.
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Affiliation(s)
- Qiang Wang
- College of Chemistry and Chemical Engineering , Inner Mongolia University , Hohhot 010021 , P. R. China.,Key Laboratory of Organo-Pharmaceutical Chemistry , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Chunbin Li
- Key Laboratory of Organo-Pharmaceutical Chemistry , Gannan Normal University , Ganzhou 341000 , P. R. China.,Guangdong Key Laboratory of Nanomedicine, Shenzhen, Engineering Laboratory of Nanomedicine and Nanoformulations, CAS Key Lab for Health Informatics , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , P. R. China
| | - Qingqing Chen
- College of Chemistry and Chemical Engineering , Inner Mongolia University , Hohhot 010021 , P. R. China.,Key Laboratory of Organo-Pharmaceutical Chemistry , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Pengfei Zhang
- Guangdong Key Laboratory of Nanomedicine, Shenzhen, Engineering Laboratory of Nanomedicine and Nanoformulations, CAS Key Lab for Health Informatics , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , P. R. China
| | - Dong Wang
- Center for AIE Research, College of Materials Science and Engineering , Shenzhen University , Shenzhen 518060 , P. R. China
| | - Miaomiao Kang
- Center for AIE Research, College of Materials Science and Engineering , Shenzhen University , Shenzhen 518060 , P. R. China
| | - Guoyu Jiang
- College of Chemistry and Chemical Engineering , Inner Mongolia University , Hohhot 010021 , P. R. China.,Key Laboratory of Organo-Pharmaceutical Chemistry , Gannan Normal University , Ganzhou 341000 , P. R. China
| | - Jianguo Wang
- College of Chemistry and Chemical Engineering , Inner Mongolia University , Hohhot 010021 , P. R. China.,Key Laboratory of Organo-Pharmaceutical Chemistry , Gannan Normal University , Ganzhou 341000 , P. R. China
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21
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Abstract
Sialic acids are cytoprotectors, mainly localized on the surface of cell membranes with multiple and outstanding cell biological functions. The history of their structural analysis, occurrence, and functions is fascinating and described in this review. Reports from different researchers on apparently similar substances from a variety of biological materials led to the identification of a 9-carbon monosaccharide, which in 1957 was designated "sialic acid." The most frequently occurring member of the sialic acid family is N-acetylneuraminic acid, followed by N-glycolylneuraminic acid and O-acetylated derivatives, and up to now over about 80 neuraminic acid derivatives have been described. They appeared first in the animal kingdom, ranging from echinoderms up to higher animals, in many microorganisms, and are also expressed in insects, but are absent in higher plants. Sialic acids are masks and ligands and play as such dual roles in biology. Their involvement in immunology and tumor biology, as well as in hereditary diseases, cannot be underestimated. N-Glycolylneuraminic acid is very special, as this sugar cannot be expressed by humans, but is a xenoantigen with pathogenetic potential. Sialidases (neuraminidases), which liberate sialic acids from cellular compounds, had been known from very early on from studies with influenza viruses. Sialyltransferases, which are responsible for the sialylation of glycans and elongation of polysialic acids, are studied because of their significance in development and, for instance, in cancer. As more information about the functions in health and disease is acquired, the use of sialic acids in the treatment of diseases is also envisaged.
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Affiliation(s)
- Roland Schauer
- Biochemisches Institut, Christian-Albrechts-Universität zu Kiel, Kiel, Germany.
| | - Johannis P Kamerling
- Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands.
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22
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Sofi MS, Sateesh MK, Bashir M, Ganie MA, Nabi S. Chemopreventive and anti-breast cancer activity of compounds isolated from leaves of Abrus precatorius L. 3 Biotech 2018; 8:371. [PMID: 30105196 PMCID: PMC6087508 DOI: 10.1007/s13205-018-1395-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 08/07/2018] [Indexed: 10/28/2022] Open
Abstract
The present study focuses on isolation and evaluation of the anti-cancer activity of compounds from the leaves of Abrus precatorius. The bioassay-directed strategy was adopted using chromatographic, gas chromatographic-mass spectrum analysis, nuclear magnetic resonance and X-ray crystallography techniques for purification and characterization of active cytotoxic compounds. Further, MDA-MB-231 breast cancer cell lines and 7,12-dimethylbenz (a) anthracene (DMBA) induced virgin female Sprague Dawley (SD) rats were used for in vitro and in vivo cytotoxicity evaluation. Stigmasterol hemihydrate and 9,12-Octadecadienoic acid (Z,Z)-2-hydroxy-1-(hydroxymethyl)ethyl ester or (β-monolinolein) were the two main cytotoxic constituents of leaf extract of A. precatorius, with an IC50 value of 74.2 and 13.2 µg/ml, respectively, in MDA-MB-231 cells. Additionally, the treatment with the stigmasterol and β-monolinolein as a combinatorial drug therapy in DMBA-induced female SD rats led to recovery of body weight, decreased tumor weight and volume, without any toxic side effects. Immunohistochemical examination showed extensive cell death and low proliferation in the treated tumor tissues that was confirmed by results from H and E staining, TUNEL assay and Ki-67 index as compared to control animal group. The reversion of glycoprotein, lysosomal and tumor marker enzyme levels back to near-normal levels after treatment with the plant compounds clearly demonstrated the reduction of tumor burden in these animals. This is the first report on isolation and characterization of the two active cytotoxic components from leaves of A. precatorius. Additionally, the profound cytotoxic and tumor-suppressive effect of these two compounds as a combinatorial therapy provide an alternative option for breast cancer treatment.
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Affiliation(s)
- Mohammed Shafi Sofi
- Molecular Diagnostics and Nanobiotechnology Laboratories, Department of Microbiology and Biotechnology, Bangalore University, J.B. Campus, Bangalore, Karnataka India
| | - M. K. Sateesh
- Molecular Diagnostics and Nanobiotechnology Laboratories, Department of Microbiology and Biotechnology, Bangalore University, J.B. Campus, Bangalore, Karnataka India
| | - Mohsin Bashir
- Molecular Reproduction and Developmental Genetics Laboratory, Indian Institute of Science, Bangalore, Karnataka India
| | - Mohd Ashraf Ganie
- Department of Endocrinology, Sheri-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir India
| | - Shabnum Nabi
- Interdisciplinary Brain Research Centre, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, 202002 India
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23
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Yuan SS, Li ML, Chen JS, Zhou L, Zhou W. Application of Mono- and Disaccharides in Drug Targeting and Efficacy. ChemMedChem 2018; 13:764-778. [DOI: 10.1002/cmdc.201700762] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 02/10/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Si S. Yuan
- School of Pharmaceutical Sciences; Guangzhou University of Chinese Medicine; E. 232 University Town, Waihuan Road Panyu Guangzhou 510006 China
| | - Mao L. Li
- School of Pharmaceutical Sciences; Guangzhou University of Chinese Medicine; E. 232 University Town, Waihuan Road Panyu Guangzhou 510006 China
| | - Jian S. Chen
- College of Horticulture; South China Agricultural University; 483 Wushan Road Guangzhou 510642 China
| | - Li Zhou
- College of Science; Hunan Agricultural University; Furong Road Changsha 410128 China
| | - Wen Zhou
- School of Pharmaceutical Sciences; Guangzhou University of Chinese Medicine; E. 232 University Town, Waihuan Road Panyu Guangzhou 510006 China
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24
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Doura T, Takahashi K, Ogra Y, Suzuki N. Combretastatin A4-β-Galactosyl Conjugates for Ovarian Cancer Prodrug Monotherapy. ACS Med Chem Lett 2017; 8:211-214. [PMID: 28197314 DOI: 10.1021/acsmedchemlett.6b00427] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 01/20/2017] [Indexed: 02/06/2023] Open
Abstract
Chemotherapy for ovarian cancer often causes severe side effects. As candidates for combretastatin A4 (CA4) prodrug for ovarian cancer prodrug monotherapy (PMT), we designed and synthesized two β-galactose-conjugated CA4s (CA4-βGals), CA4-βGal-1 and CA4-βGal-2. CA4 was liberated from CA4-βGals by β-galactosidase, an enzyme more strongly expressed in ovarian cancer cells than normal cells. CA4-βGal-2, which has a self-immolative benzyl linker between CA4 and the β-galactose moiety, was more cytotoxic to ovarian cancer cell lines than CA4-βGal-1 without a linker. Therefore, CA4-βGal-2 can serve as a platform for the design and manufacture of prodrugs for ovarian cancer PMT.
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Affiliation(s)
- Tomohiro Doura
- Graduate School of Pharmaceutical
Sciences, Chiba University, 1-8-1 Inohana,
Chuo-ku, Chiba 260-8675, Japan
| | - Kazuaki Takahashi
- Graduate School of Pharmaceutical
Sciences, Chiba University, 1-8-1 Inohana,
Chuo-ku, Chiba 260-8675, Japan
| | - Yasumitsu Ogra
- Graduate School of Pharmaceutical
Sciences, Chiba University, 1-8-1 Inohana,
Chuo-ku, Chiba 260-8675, Japan
| | - Noriyuki Suzuki
- Graduate School of Pharmaceutical
Sciences, Chiba University, 1-8-1 Inohana,
Chuo-ku, Chiba 260-8675, Japan
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25
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Thasnim P, Bahulayan D. Click-on fluorescent triazolyl coumarin peptidomimetics as inhibitors of human breast cancer cell line MCF-7. NEW J CHEM 2017. [DOI: 10.1039/c7nj02712e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A fluorogenic click reaction which enables the formation of fluorescent and bioactive triazolylcoumarinsviaa photoinduced electron transfer process is described.
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Affiliation(s)
- P. Thasnim
- Department of Chemistry
- University of Calicut
- Malappuram 673635
- India
| | - D. Bahulayan
- Department of Chemistry
- University of Calicut
- Malappuram 673635
- India
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26
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Nakada-Tsukui K, Nozaki T. Immune Response of Amebiasis and Immune Evasion by Entamoeba histolytica. Front Immunol 2016; 7:175. [PMID: 27242782 PMCID: PMC4863898 DOI: 10.3389/fimmu.2016.00175] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 04/20/2016] [Indexed: 12/27/2022] Open
Abstract
Entamoeba histolytica is a protozoan parasite and the causative agent of amebiasis. It is estimated approximately 1% of humans are infected with E. histolytica, resulting in an estimate of 100,000 deaths annually. Clinical manifestations of amebic infection range widely from asymptomatic to severe symptoms, including dysentery and extra-intestinal abscesses. Like other infectious diseases, it is assumed that only ~20% of infected individuals develop symptoms, and genetic factors of both the parasite and humans as well as the environmental factors, e.g., microbiota, determine outcome of infection. There are multiple essential steps in amebic infection: degradation of and invasion into the mucosal layer, adherence to the intestinal epithelium, invasion into the tissues, and dissemination to other organs. While the mechanisms of invasion and destruction of the host tissues by the amebae during infection have been elucidated at the molecular levels, it remains largely uncharacterized how the parasite survive in the host by evading and attacking host immune system. Recently, the strategies for immune evasion by the parasite have been unraveled, including immunomodulation to suppress IFN-γ production, elimination of immune cells and soluble immune mediators, and metabolic alterations against reactive oxygen and nitrogen species to fend off the attack from immune system. In this review, we summarized the latest knowledge on immune reaction and immune evasion during amebiasis.
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Affiliation(s)
- Kumiko Nakada-Tsukui
- Department of Parasitology, National Institute of Infectious Diseases , Tokyo , Japan
| | - Tomoyoshi Nozaki
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo, Japan; Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
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27
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Matsuzaki H, Kamiya M, Iwatate RJ, Asanuma D, Watanabe T, Urano Y. Novel Hexosaminidase-Targeting Fluorescence Probe for Visualizing Human Colorectal Cancer. Bioconjug Chem 2016; 27:973-81. [PMID: 27009615 DOI: 10.1021/acs.bioconjchem.6b00037] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Precise tumor diagnosis and evaluation of disease extent are crucial for treatment of solid cancers. In order to complement the limited ability of the unaided human eye to discriminate tumor tissue and normal tissue, we have developed a series of fluorescence probes activatable specifically in cancer tissues. Here, we describe the design, synthesis, and application of a new fluorescence probe targeting hexosaminidase (HMRef-βGlcNAc), which is located in lysosomes and is overexpressed in several carcinomas, including colorectal cancer. This probe could sensitively detect intracellular hexosaminidase activity in human colorectal cancer cell lines, and could visualize tiny metastatic nodules (smaller than 1 mm) in a mouse model of disseminated human peritoneal colorectal cancer (HCT116). In human colorectal cancer specimens obtained at surgery, the probe showed high tumor sensitivity/specificity, together with a high tumor-to-normal signal ratio. HMRef-βGlcNAc is a promising candidate for clinical application during surgical or endoscopic procedures to treat colorectal cancer.
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Affiliation(s)
- Hiroyuki Matsuzaki
- Department of Surgical Oncology, The University of Tokyo Hospital , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Mako Kamiya
- PRESTO, Japan Science and Technology Agency , 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | | | | | - Toshiaki Watanabe
- Department of Surgical Oncology, The University of Tokyo Hospital , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Yasuteru Urano
- CREST, Japan Agency for Medical Research and Development , 1-7-1 Otemachi, Chiyoda-ku, Tokyo 100-0004, Japan
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28
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Sensitive β-galactosidase-targeting fluorescence probe for visualizing small peritoneal metastatic tumours in vivo. Nat Commun 2015; 6:6463. [PMID: 25765713 PMCID: PMC4382686 DOI: 10.1038/ncomms7463] [Citation(s) in RCA: 288] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 02/02/2015] [Indexed: 12/18/2022] Open
Abstract
Fluorescence-guided diagnostics is one of the most promising approaches for facile detection of cancer in situ. Here we focus on β-galactosidase, which is overexpressed in primary ovarian cancers, as a molecular target for visualizing peritoneal metastases from ovarian cancers. As existing fluorescence probes are unsuitable, we have designed membrane-permeable HMRef-βGal, in which the optimized intramolecular spirocyclic function affords >1,400-fold fluorescence enhancement on activation. We confirm that HMRef-βGal sensitively detects intracellular β-galactosidase activity in several ovarian cancer lines. In vivo, this probe visualizes metastases as small as <1 mm in diameter in seven mouse models of disseminated human peritoneal ovarian cancer (SHIN3, SKOV3, OVK18, OVCAR3, OVCAR4, OVCAR5 and OVCAR8). Because of its high brightness, real-time detection of metastases with the naked eye is possible. Endoscopic fluorescence detection of metastases is also demonstrated. The results clearly indicate preclinical potential value of the probe for fluorescence-guided diagnosis of peritoneal metastases from ovarian cancers.
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Barat R, Legigan T, Tranoy-Opalinski I, Renoux B, Péraudeau E, Clarhaut J, Poinot P, Fernandes AE, Aucagne V, Leigh DA, Papot S. A mechanically interlocked molecular system programmed for the delivery of an anticancer drug. Chem Sci 2015; 6:2608-2613. [PMID: 29308165 PMCID: PMC5649224 DOI: 10.1039/c5sc00648a] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 02/23/2015] [Indexed: 11/21/2022] Open
Abstract
The development of mechanically interlocked molecular systems programmed to operate autonomously in biological environments is an emerging field of research with potential medicinal applications.
The development of mechanically interlocked molecular systems programmed to operate autonomously in biological environments is an emerging field of research with potential medicinal applications. Within this framework, functional rotaxane- and pseudorotaxane-based architectures are starting to attract interest for the delivery of anticancer drugs, with the ultimate goal to improve the efficiency of cancer chemotherapy. Here, we report an enzyme-sensitive [2]-rotaxane designed to release a potent anticancer drug within tumor cells. The molecular device includes a protective ring that prevents the premature liberation of the drug in plasma. However, once located inside cancer cells the [2]-rotaxane leads to the release of the drug through the controlled disassembly of the mechanically interlocked components, in response to a determined sequence of two distinct enzymatic activations. Furthermore, in vitro biological evaluations reveal that this biocompatible functional system exhibits a noticeable level of selectivity for cancer cells overexpressing β-galactosidase.
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Affiliation(s)
- Romain Barat
- Université de Poitiers , UMR-CNRS 7285 , Institut de Chimie des Milieux et des Matériaux de Poitiers , groupe « Systèmes Moléculaires Programmés » , 4 rue Michel Brunet, TSA 51106 , 86073 Poitiers , France .
| | - Thibaut Legigan
- Université de Poitiers , UMR-CNRS 7285 , Institut de Chimie des Milieux et des Matériaux de Poitiers , groupe « Systèmes Moléculaires Programmés » , 4 rue Michel Brunet, TSA 51106 , 86073 Poitiers , France .
| | - Isabelle Tranoy-Opalinski
- Université de Poitiers , UMR-CNRS 7285 , Institut de Chimie des Milieux et des Matériaux de Poitiers , groupe « Systèmes Moléculaires Programmés » , 4 rue Michel Brunet, TSA 51106 , 86073 Poitiers , France .
| | - Brigitte Renoux
- Université de Poitiers , UMR-CNRS 7285 , Institut de Chimie des Milieux et des Matériaux de Poitiers , groupe « Systèmes Moléculaires Programmés » , 4 rue Michel Brunet, TSA 51106 , 86073 Poitiers , France .
| | - Elodie Péraudeau
- Université de Poitiers , CNRS ERL 7368 , 1 rue Georges Bonnet, TSA 51106 , 86073 Poitiers , France.,CHU de Poitiers , 2 rue de la Milétrie, CS 90577 , 86021 Poitiers , France
| | - Jonathan Clarhaut
- Université de Poitiers , UMR-CNRS 7285 , Institut de Chimie des Milieux et des Matériaux de Poitiers , groupe « Systèmes Moléculaires Programmés » , 4 rue Michel Brunet, TSA 51106 , 86073 Poitiers , France . .,CHU de Poitiers , 2 rue de la Milétrie, CS 90577 , 86021 Poitiers , France
| | - Pauline Poinot
- Université de Poitiers , UMR-CNRS 7285 , Institut de Chimie des Milieux et des Matériaux de Poitiers , Equipe Eau, Géochimie Organique, Santé (EGS) , 4 rue Michel Brunet, TSA 51106 , 86073 Poitiers , France
| | - Antony E Fernandes
- Institute of Condensed Matter and Nanoscience , Université catholique de Louvain , place Croix du Sud , 1348 Louvain-la-Neuve , Belgium
| | - Vincent Aucagne
- Centre de Biophysique Moléculaire , CNRS , rue Charles Sadron , 45071 Orléans Cedex 2 , France
| | - David A Leigh
- School of Chemistry University of Manchester , Oxford road , Manchester MP13 9PL , UK
| | - Sébastien Papot
- Université de Poitiers , UMR-CNRS 7285 , Institut de Chimie des Milieux et des Matériaux de Poitiers , groupe « Systèmes Moléculaires Programmés » , 4 rue Michel Brunet, TSA 51106 , 86073 Poitiers , France .
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Abstract
Alkyne-hinged 3-fluorosialyl fluoride (DFSA) containing an alkyne group was shown to be a mechanism-based target-specific irreversible inhibitor of sialidases. The ester-protected analog DFSA (PDFSA) is a membrane-permeable precursor of DFSA designed to be used in living cells, and it was shown to form covalent adducts with virus, bacteria, and human sialidases. The fluorosialyl-enzyme adduct can be ligated with an azide-annexed biotin via click reaction and detected by the streptavidin-specific reporting signals. Liquid chromatography-mass spectrometry/mass spectrometry analysis on the tryptic peptide fragments indicates that the 3-fluorosialyl moiety modifies tyrosine residues of the sialidases. DFSA was used to demonstrate influenza infection and the diagnosis of the viral susceptibility to the anti-influenza drug oseltamivir acid, whereas PDFSA was used for in situ imaging of the changes of sialidase activity in live cells.
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Sokolosky ML, Wargovich MJ. Homeostatic imbalance and colon cancer: the dynamic epigenetic interplay of inflammation, environmental toxins, and chemopreventive plant compounds. Front Oncol 2012; 2:57. [PMID: 22675672 PMCID: PMC3365481 DOI: 10.3389/fonc.2012.00057] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Accepted: 05/14/2012] [Indexed: 12/18/2022] Open
Abstract
The advent of modern medicine has allowed for significant advances within the fields of emergency care, surgery, and infectious disease control. Health threats that were historically responsible for immeasurable tolls on human life are now all but eradicated within certain populations, specifically those that enjoy higher degrees of socio-economic status and access to healthcare. However, modernization and its resulting lifestyle trends have ushered in a new era of chronic illness; one in which an unprecedented number of people are estimated to contract cancer and other inflammatory diseases. Here, we explore the idea that homeostasis has been redefined within just a few generations, and that diseases such as colorectal cancer are the result of fluctuating physiological and molecular imbalances. Phytochemical-deprived, pro-inflammatory diets combined with low-dose exposures to environmental toxins, including bisphenol-A (BPA) and other endocrine disruptors, are now linked to increasing incidences of cancer in westernized societies and developing countries. There is recent evidence that disease determinants are likely set in utero and further perpetuated into adulthood dependent upon the innate and environmentally-acquired phenotype unique to each individual. In order to address a disease as multi-factorial, case-specific, and remarkably adaptive as cancer, research must focus on its root causes in order to elucidate the molecular mechanisms by which they can be prevented or counteracted via plant-derived compounds such as epigallocatechin-3-gallate (EGCG) and resveratrol. The significant role of epigenetics in the regulation of these complex processes is emphasized here to form a comprehensive view of the dynamic interactions that influence modern-day carcinogenesis, and how sensibly restoring homeostatic balance may be the key to the cancer riddle.
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Affiliation(s)
- Melissa L Sokolosky
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Hollings Cancer Center, Medical University of South Carolina Charleston, SC, USA
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Balog CIA, Stavenhagen K, Fung WLJ, Koeleman CA, McDonnell LA, Verhoeven A, Mesker WE, Tollenaar RAEM, Deelder AM, Wuhrer M. N-glycosylation of colorectal cancer tissues: a liquid chromatography and mass spectrometry-based investigation. Mol Cell Proteomics 2012; 11:571-85. [PMID: 22573871 PMCID: PMC3434767 DOI: 10.1074/mcp.m111.011601] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Colorectal cancer is the third most common cancer worldwide with an annual incidence of ∼1 million cases and an annual mortality rate of ∼655,000 individuals. There is an urgent need for identifying novel targets to develop more sensitive, reliable, and specific tests for early stage detection of colon cancer. Post-translational modifications are known to play an important role in cancer progression and immune surveillance of tumors. In the present study, we compared the N-glycan profiles from 13 colorectal cancer tumor tissues and corresponding control colon tissues. The N-glycans were enzymatically released, purified, and labeled with 2-aminobenzoic acid. Aliquots were profiled by hydrophilic interaction liquid chromatography (HILIC-HPLC) with fluorescence detection and by negative mode MALDI-TOF-MS. Using partial least squares discriminant analysis to investigate the N-glycosylation changes in colorectal cancer, an excellent separation and prediction ability were observed for both HILIC-HPLC and MALDI-TOF-MS data. For structure elucidation, information from positive mode ESI-ion trap-MS/MS and negative mode MALDI-TOF/TOF-MS was combined. Among the features with a high separation power, structures containing a bisecting GlcNAc were found to be decreased in the tumor, whereas sulfated glycans, paucimannosidic glycans, and glycans containing a sialylated Lewis type epitope were shown to be increased in tumor tissues. In addition, core-fucosylated high mannose N-glycans were detected in tumor samples. In conclusion, the combination of HILIC and MALDI-TOF-MS profiling of N-glycans with multivariate statistical analysis demonstrated its potential for identifying N-glycosylation changes in colorectal cancer tissues and provided new leads that might be used as candidate biomarkers.
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Affiliation(s)
- Crina I A Balog
- Biomolecular Mass Spectrometry Unit, Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.
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Real-Time PCR Data Processing Shown by the Analysis of Colorectal Specific Candidate Genes, ERCC1, RRM1 and TS in Relation to β2M as Endogenous Control. APPLIED SCIENCES-BASEL 2012. [DOI: 10.3390/app2010139] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Li X, Zhang L, Shao Y, Liang Z, Shao C, Wang B, Guo B, Li N, Zhao X, Li Y, Xu D. Effects of a human plasma membrane-associated sialidase siRNA on prostate cancer invasion. Biochem Biophys Res Commun 2011; 416:270-6. [PMID: 22093819 DOI: 10.1016/j.bbrc.2011.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 11/01/2011] [Indexed: 10/15/2022]
Abstract
Human plasma membrane-associated sialidase (Neu3) is one of several sialidases that hydrolyze sialic acids in the terminal position of the carbohydrate groups of glycolipids and glycoproteins. Neu3 is mainly localized in plasma membranes and plays crucial roles in the regulation of cell surface functions. In this study, we investigated the effects and molecular mechanisms of Neu3 on cell invasion and migration in vivo and in vitro. Initially, we found that the levels of Neu3 expression were higher in prostate cancer tissues and cell lines than in normal prostate tissues based on RT-PCR and Western blotting analyses. We then applied a Neu3 siRNA approach to block Neu3 signaling using PC-3M cells as model cells. Transwell invasion assays and wound assays showed significantly decreased invasion and migration potential in the Neu3 siRNA-transfected cells. RT-PCR and Western blotting analyses revealed that Neu3 knockdown decreased the expressions of the matrix metalloproteinases MMP-2 and MMP-9. In vivo, mice injected with PC-3M cell tumors were evaluated by SPECT/CT to determine the presence of bone metastases. Mice treated with attenuated Salmonella carrying the Neu3 siRNA developed fewer bone metastases than mice treated with attenuated Salmonella carrying a control Scramble siRNA, attenuated Salmonella alone or PBS. The results for bone metastasis detection by pathology were consistent with the data obtained by SPECT/CT. Tumor blocks were evaluated by histochemical, RT-PCR and Western blotting analyses. The results revealed decreased expressions of MMP-2 and MMP-9 at the mRNA and protein levels. Taken together, the present findings suggest that Neu3 is a promising molecular target for the prevention of prostate cancer metastasis.
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Affiliation(s)
- Xiaojie Li
- Department of Pathophysiology, Prostate Diseases Prevention and Treatment Research Centre, Norman Bethune Medical School, Jilin University, Changchun, China
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Pugalendhi P, Manoharan S, Suresh K, Baskaran N. Genistein and daidzein, in combination, protect cellular integrity during 7,12-dimethylbenz[a]anthracene (DMBA) induced mammary carcinogenesis in Sprague-Dawley rats. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES : AJTCAM 2010; 8:91-7. [PMID: 22238489 PMCID: PMC3252688 DOI: 10.4314/ajtcam.v8i2.63196] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The status of glycoconjugates (protein bound hexose, hexosamine, sialic acid and fucose) in plasma or serum serve as potential biomarkers for assessing tumor progression and therapeutic interventions. Aim of the present study was to investigate the protective effect of two major soy isoflavones, genistein and daidzein, in combination on the status of glycoconjugates in plasma, erythrocyte membrane and mammary tissues during 7,12-dimethylbenz[a]anthracene (DMBA) induced mammary carcinogenesis in female Sprague-Dawley rats. A single subcutaneous injection of DMBA (25 mg rat(-1)) in the mammary gland developed mammary carcinoma in female Sprague-Dawley rats. Elevated levels of plasma and mammary tissue glycoconjugates accompanied by reduction in erythrocyte membrane glycoconjugates were observed in rats bearing mammary tumors. Oral administration of genistein + daidzein (20 mg + 20 mg kg(-1) bw/day) to DMBA treated rats significantly (p< 0.05) brought back the status of glycoconjugates to near normal range. The present study thus demonstrated that genistein and daidzein in combination protected the structural integrity of the cell surface and membranes during DMBA-induced mammary carcinogenesis.
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Affiliation(s)
- Pachaiappan Pugalendhi
- Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, Tamil Nadu, India
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Potapenko IO, Haakensen VD, Lüders T, Helland A, Bukholm I, Sørlie T, Kristensen VN, Lingjaerde OC, Børresen-Dale AL. Glycan gene expression signatures in normal and malignant breast tissue; possible role in diagnosis and progression. Mol Oncol 2009; 4:98-118. [PMID: 20060370 DOI: 10.1016/j.molonc.2009.12.001] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2009] [Revised: 12/02/2009] [Accepted: 12/02/2009] [Indexed: 01/24/2023] Open
Abstract
Glycosylation is the stepwise procedure of covalent attachment of oligosaccharide chains to proteins or lipids, and alterations in this process have been associated with malignant transformation. Simultaneous analysis of the expression of all glycan-related genes clearly gives the advantage of enabling a comprehensive view of the genetic background of the glycobiological changes in cancer cells. Studies focusing on the expression of the whole glycome have now become possible, which prompted us to review the present knowledge on glycosylation in relation to breast cancer diagnosis and progression, in the light of available expression data from tumors and breast tissue of healthy individuals. We used various data resources to select a set of 419 functionally relevant genes involved in synthesis, degradation and binding of N-linked and O-linked glycans, Lewis antigens, glycosaminoglycans (chondroitin, heparin and keratan sulfate in addition to hyaluronan) and glycosphingolipids. Such glycans are involved in a number of processes relevant to carcinogenesis, including regulation of growth factors/growth factor receptors, cell-cell adhesion and motility as well as immune system modulation. Expression analysis of these glycan-related genes revealed that mRNA levels for many of them differ significantly between normal and malignant breast tissue. An associative analysis of these genes in the context of current knowledge of their function in protein glycosylation and connection(s) to cancer indicated that synthesis, degradation and adhesion mediated by glycans may be altered drastically in mammary carcinomas. Although further analysis is needed to assess how changes in mRNA levels of glycan genes influence a cell's glycome and the precise role that such altered glycan structures play in the pathogenesis of the disease, lessons drawn from this study may help in determining directions for future research in the rapidly-developing field of glycobiology.
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Affiliation(s)
- Ivan O Potapenko
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway
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Abd Hamid UM, Royle L, Saldova R, Radcliffe CM, Harvey DJ, Storr SJ, Pardo M, Antrobus R, Chapman CJ, Zitzmann N, Robertson JF, Dwek RA, Rudd PM. A strategy to reveal potential glycan markers from serum glycoproteins associated with breast cancer progression. Glycobiology 2008; 18:1105-18. [PMID: 18818422 DOI: 10.1093/glycob/cwn095] [Citation(s) in RCA: 168] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Aberrant glycosylation on glycoproteins that are either presented on the surface or secreted by cancer cells is a potential source of disease biomarkers and provides insights into disease pathogenesis. N-Glycans of the total serum glycoproteins from advanced breast cancer patients and healthy individuals were sequenced by HPLC with fluorescence detection coupled with exoglycosidase digestions and mass spectrometry. We observed a significant increase in a trisialylated triantennary glycan containing alpha1,3-linked fucose which forms part of the sialyl Lewis x epitope. Following digestion of the total glycan pool with a combination of sialidase and beta-galactosidase, we segregated and quantified a digestion product, a monogalactosylated triantennary structure containing alpha1,3-linked fucose. We compared breast cancer patients and controls and detected a 2-fold increase in this glycan marker in patients. In 10 patients monitored longitudinally, we showed a positive correlation between this glycan marker and disease progression and also demonstrated its potential as a better indicator of metastasis compared to the currently used biomarkers, CA 15-3 and carcinoembryonic antigen (CEA). A pilot glycoproteomic study of advanced breast cancer serum highlighted acute-phase proteins alpha1-acid glycoprotein, alpha1-antichymotrypsin, and haptoglobin beta-chain as contributors to the increase in the glycan marker which, when quantified from each of these proteins, marked the onset of metastasis in advance of the CA 15-3 marker. These preliminary findings suggest that specific glycans and glycoforms of proteins may be candidates for improved markers in the monitoring of breast cancer progression.
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Affiliation(s)
- Umi M Abd Hamid
- Oxford Glycobiology Institute, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX13QU, UK
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Miyagi T. Aberrant expression of sialidase and cancer progression. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2008; 84:407-418. [PMID: 19075514 PMCID: PMC3720545 DOI: 10.2183/pjab.84.407] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Accepted: 09/30/2008] [Indexed: 05/27/2023]
Abstract
Aberrant sialylation is closely associated with the malignant phenotype of cancer cells including metastatic potential and invasiveness. However, its biological significance and molecular mechanisms have yet to be fully elucidated. To determine causes and consequences, we have focused attention on mammalian sialidases, which cleave sialic acids from gangliosides and glycoproteins. The four types of human sialidases identified to date behave in different manners during carcinogenesis. One, found in the lysosomes, shows down-regulation in cancers, promoting anchorage-independent growth and contributing to metastatic ability, while another, found in the plasma membranes, exhibits marked up-regulation, resulting in suppression of apoptosis. The present review summarizes mostly our results on aberrant expression of sialidases and their possible roles in cancer progression.
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Affiliation(s)
- Taeko Miyagi
- Division of Biochemistry, Miyagi Cancer Center Research Institute, Natori, Miyagi, Japan.
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Borzym-Kluczyk M, Olszewska E, Radziejewska I, Lewszuk A, Zwierz K. Isoenzymes of N-acetyl-β-hexosaminidase in human pleomorphic adenoma and healthy salivary glands: a preliminary study. Clin Chem Lab Med 2008; 46:131-6. [DOI: 10.1515/cclm.2008.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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40
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Devalapally H, Navath RS, Yenamandra V, Akkinepally RR, Devarakonda RK. Beta-galactoside prodrugs of doxorubicin for application in antibody directed enzyme prodrug therapy/prodrug monotherapy. Arch Pharm Res 2007; 30:723-32. [PMID: 17679550 DOI: 10.1007/bf02977634] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Anthracycline antibiotics, particularly doxorubicin and daunorubicin, have been used exten sively in the treatment of human malignancies. However cardiotoxicity and multidrug resistance are significant problems that limit the clinical efficacy of such agents. Rational design to avoid these side effects includes strategies such as drug targeting and prodrug synthesis. Described here are the synthesis and preliminary biological evaluation of the enzymatically activated two new prodrugs (6 & 11) of doxorubicin. These prodrugs were designed as potential candidates for selective chemotherapy in ADEPT or PMT strategies. They are constituted of a galactose moiety, a spacer and the cytotoxic drug and they differ by the type of spacer. The prodrugs were stable in a buffer, and the in vitro studies showed good detoxification and hydrolysis kinetics. As prodrug 11 was readily hydrolyzed, this could be a valuable candidate for further development.
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Affiliation(s)
- HariKrishna Devalapally
- Drug Metabolism, Pharmacokinetics, Cancer & Aging Research Division, University College of Pharmaceutical Sciences, Kakatiya University, Warangal-9, AP, India
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Flowers HM, Sharon N. Glycosidases--properties and application to the study of complex carbohydrates and cell surfaces. ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY 2006; 48:29-95. [PMID: 367104 DOI: 10.1002/9780470122938.ch2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Wielgat P, Walczuk U, Szajda S, Bień M, Zimnoch L, Mariak Z, Zwierz K. Activity of lysosomal exoglycosidases in human gliomas. J Neurooncol 2006; 80:243-9. [PMID: 16710745 DOI: 10.1007/s11060-006-9188-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2005] [Accepted: 04/25/2006] [Indexed: 11/30/2022]
Abstract
There is a lot of data suggesting that modifications of cell glycoconjugates may be important in progression of cancer. In the present work we studied activities of lysosomal exoglycosidases: beta-hexosaminidase and its isoenzymes A and B, beta-galactosidase and alpha-mannosidase, in human gliomas. Enzyme activity was determined spectrophotometrically based on the release of p-nitrophenol from p-nitrophenyl-derivative of appropriate sugars. The activities of the exoglycosidases tested were significantly higher in malignant glial tumors than in control tissue (normal brain tissue) and non-glial tumors. The highest activities of exoglycosidases were observed in high-grade gliomas, and a positive correlation of enzyme activities and degree of malignancy was noted. Our results suggest that lysosomal exoglycosidases may participate in the progression and dynamical development of glial tumors.
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Affiliation(s)
- P Wielgat
- Department of Pharmaceutical Biochemistry, Medical University of Bialystok, ul. Mickiewicza 2A , 15-089, Bialystok, Poland.
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Schiel KA. An etiologic model proposing that sporadic adult-onset carcinoma is extramedullary hematopoiesis. Med Hypotheses 2006; 67:93-109. [PMID: 16540257 DOI: 10.1016/j.mehy.2006.01.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2006] [Accepted: 01/16/2006] [Indexed: 11/30/2022]
Abstract
This model proposes that primary carcinomatous tumors and almost all metastases are extramedullary hematopoietic tissue formed to compensate for reduced hematopoietic activity in the bone marrow. These marrow lesions are currently considered to be metastatic in origin, but as fibrosis and sclerosis are identifying features they are here equated to myelofibrosis. Myelofibrotic marrow is characterized by an increase in the number and size of vascular sinusoids. The increased blood flow suggested by this morphology, and observed in myelofibrosis patients, causes a rise in marrow pressure which may trigger the fibrosis. Specific carcinoma morphologies are equated to stages in endochondral bone and marrow formation and, as such, cancer cell identity varies with morphology. For example, infiltrating carcinomas of the breast consist of collagen and mucoid secreting cells in single file formation. This morphology is equated to the cartilagenous stage of marrow formation, when mesenchymal stem cells proliferate and differentiate into chondroblasts. In this model "infiltrating" cells arise in situ from stem cells located in the connective tissue. Tubular breast carcinoma, with its single layer of osteoblast-like carcinoma cells encircling small lumens and long branching tubules, is equated to the trabecular stage of marrow formation during which osteoblasts surround small pieces of calcified cartilage and begin secreting osteoid that will form the trabeculae. Lobular carcinoma in situ consists of cancer cell clusters separated by narrow clear spaces that, under high magnification, appear vascular. This morphology is equated to hematopoietic tissue in which primitive hematopoietic cells lie between anastomosing sinusoids. Similar cartilagenous, trabecular and hematopoietic morphologies can be found in carcinomatous tumors of most organs, but the nomenclature is variable. The hematopoietic carcinomas share numerous features with hematopoietic tissue including a structure composed of intermingled normoxic and hypoxic regions and a metabolism characterized by elevated levels of glycolysis. They also contain similar proportions of clonal cells. If this model is correct it necessitates a change in the treatment of carcinoma. If cancer cells are not the enemy, but desperately needed immature blood cells, and the medical problem is not the presence of tumors, but the inefficiency of this extramedullary hematopoietic tissue, then treatment should focus on increasing marrow hematopoiesis. As evidence suggests that the marrow lesion is the result of increased hydrostatic pressure this could be done by reducing blood volume. One way to accomplish this may be through the ingestion of ephedrine, as it is hypothesized to increase vascular tone.
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Abstract
Aberrant sialylation in cancer cells is thought to be a characteristic feature associated with malignant properties including invasiveness and metastatic potential. Sialidase which catalyzes the removal of sialic acid residues from glycoproteins and glycolipids, has been suggested to play important roles in many biological processes through regulation of cellular sialic acid contents. The altered expression of sialidase observed in cancer would, therefore, suggest its involvement in the malignant process. In mammalian cells, three types of sialidase cloned and characterized to date were found to behave in different manners during carcinogenesis. Recent progress in molecular cloning of these sialidases has facilitated elucidation of the molecular mechanisms and significance of these alterations. Herein we briefly describe our own studies on sialidase changes associated with malignant transformation and summarize the topic from both a retrospective and a prospective viewpoint. Sialidases are indeed closely related to malignancy and are thus potential targets for cancer diagnosis and therapy.
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Affiliation(s)
- Taeko Miyagi
- Division of Biochemistry, Research Institute, Miyagi Prefectural Cancer Center, Natori, Miyagi 981-1293, Japan.
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Griffiths JB, Electricwala A. Production of tissue plasminogen activators from animal cells. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2005; 34:147-66. [PMID: 3113182 DOI: 10.1007/bfb0000678] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Hsu CC, Lin TW, Chang WW, Wu CY, Lo WH, Wang PH, Tsai YC. Soyasaponin-I-modified invasive behavior of cancer by changing cell surface sialic acids. Gynecol Oncol 2005; 96:415-22. [PMID: 15661230 DOI: 10.1016/j.ygyno.2004.10.010] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2003] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Sialylation involving tumor formation and invasive behavior goes along with altered sialyltransferase (ST) activity. A potent ST inhibitor, soyasaponin I (SsaI), was discovered to selectively inhibit the cellular alpha2,3-sialyltranserase activity. In this study, we further test the effects of SsaI on modifying the metastatic and invasive behaviors of cancer cell lines. METHODS Nonmetastatic breast cancer cell line, MCF-7, and highly metastastic breast cancer cell line, MDA-MB-231, were used to investigate the effects of SsaI on tumor cells. RESULTS SsaI did not affect cell growth cycle and also failed to inhibit cell growth in this study (the concentration of SsaI < or=100 muM). SsaI was as predicted to successfully inhibit cellular alpha2,3-ST activity and depressed the dose-dependent tumor cell surface alpha2,3-sialic acid expression. In addition, different concentrations of SsaI did stimulate MCF-7 cell adhesion to collagen type I linearly and significantly enhanced cell adhesion to the Matrigel-matrix. Furthermore, SsaI significantly decreased MDA-MB-231 cell migration. Reverse transcriptase polymerase chain reaction for evaluating mRNA expression of ST3Gal I, III and IV showed that SsaI also down-regulated the expression of ST3Gal IV but did not affect the other two. CONCLUSIONS The results showed that SsaI was implicated in the invasive behavior of tumor cells, suggesting that altered alpha2,3-sialylation pathway played a crucial role in the adhesion and tumor metastases. SsaI is a good candidate for studying the biological roles of ST, and might provide a new preventive strategy in tumor metastasis.
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Affiliation(s)
- Chi-Cheng Hsu
- Institute of Biochemistry, National Yang-Ming University, Taipei, Taiwan
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Journet A, Ferro M. The potentials of MS-based subproteomic approaches in medical science: the case of lysosomes and breast cancer. MASS SPECTROMETRY REVIEWS 2004; 23:393-442. [PMID: 15290709 DOI: 10.1002/mas.20001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Because of the great number of women who are diagnosed with breast cancer each year, and though this disease presents the lowest mortality rate among cancers, breast cancer remains a major public health problem. As for any cancer, the tumorigenic and metastatic processes are still hardly understood, and the biochemical markers that allow either a precise monitoring of the disease or the classification of the numerous forms of breast cancer remain too scarce. Therefore, great hopes are put on the development of high-throughput genomic and proteomic technologies. Such comprehensive techniques should help in understanding the processes and in defining steps of the disease by depicting specific genes or protein profiles. Because techniques dedicated to the current proteomic challenges are continuously improving, the probability of the discovery of new potential protein biomarkers is rapidly increasing. In addition, the identification of such markers should be eased by lowering the sample complexity; e.g., by sample fractionation, either according to specific physico-chemical properties of the proteins, or by focusing on definite subcellular compartments. In particular, proteins of the lysosomal compartment have been shown to be prone to alterations in their localization, expression, or post-translational modifications (PTMs) during the cancer process. Some of them, such as the aspartic protease cathepsin D (CatD), have even been proven as participating actively in the disease progression. The present review aims at giving an overview of the implication of the lysosome in breast cancer, and at showing how subproteomics and the constantly refining MS-based proteomic techniques may help in making breast cancer research progress, and thus, hopefully, in improving disease treatment.
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Affiliation(s)
- Agnès Journet
- Laboratoire de Chimie des Protéines, ERM-0201 Inserm, DRDC, CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble, France.
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Gullbo J, Dhar S, Luthman K, Ehrsson H, Lewensohn R, Nygren P, Larsson R. Antitumor activity of the alkylating oligopeptides J1 (L-melphalanyl-p-L-fluorophenylalanine ethyl ester) and P2 (L-prolyl-m-L-sarcolysyl-p-L-fluorophenylalanine ethyl ester): comparison with melphalan. Anticancer Drugs 2004; 14:617-24. [PMID: 14501383 DOI: 10.1097/00001813-200309000-00006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Peptichemio, a mixture of six short oligopeptides all comprising the alkylating amino acid m-L-sarcolysin, has shown clinical activity in several malignancies. Previous studies have suggested that activity mainly resides in one of the peptides, P2 (L-prolyl-m-L-sarcolysyl-p-L-fluorophenylalanine ethyl ester). In the present study the in vitro activity of P2 was further investigated and compared to melphalan and the novel alkylating dipeptide J1 (L-melphalanyl-p-L-fluorophenylalanine ethyl ester), which is structurally related to P2 and melphalan. Cytotoxic activity was studied using patient tumor cells in a non-clonogenic cytotoxicity assay, whereas cellular response, and kinetics thereof, were studied in the lymphoma cell line U-937 GTB. Cellular metabolism was studied using microphysiometry, kinetic effects on macromolecular synthesis by radiolabeled substrate incorporation and, finally, the microculture kinetic assay of apoptosis was used to monitor morphologic changes following drug exposure. The assays compared P2 favorably with melphalan. Interestingly J1 was even more cytotoxic, and produced more pronounced effects in the kinetic assays for macromolecular synthesis, metabolic activity and apoptosis. The results indicate that the delivery properties of J1 are improved compared to those of melphalan and P2.
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Affiliation(s)
- Joachim Gullbo
- Department of Medical Sciences, Division of Clinical Pharmacology, Uppsala University, Uppsala, Sweden.
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Slawson C, Pidala J, Potter R. Increased N-acetyl-beta-glucosaminidase activity in primary breast carcinomas corresponds to a decrease in N-acetylglucosamine containing proteins. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1537:147-57. [PMID: 11566258 DOI: 10.1016/s0925-4439(01)00067-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
N-acetylglucosamine (O-GlcNAc) modification on serine or threonine residues of cytoplasmic and nuclear proteins has become a more recognized intracellular covalent modification. Removal of this modification is carried out by N-acetyl-beta-glucosaminidase (O-GlcNAcase). Since little information exists on monoglycosylation and O-GlcNAcase activity in mitogenic systems, we investigated O-GlcNAcase activity in primary breast tumors compared to matched normal adjacent breast tissue and examined enzymatic activity in relationship to the level of protein monoglycosylation. Using a variation of the acidic hexosaminidase activity assay, we demonstrated an increase in both O-GlcNAcase and lysosomal hexosaminidase activity in breast tumor tissue compared to matched adjacent tissue. Although no clear correlation with tumor grade or type was apparent among the samples examined (12 matched pairs), the increase in O-GlcNAcase and lysosomal hexosaminidase activity in tumor tissue was consistently elevated and statistically significant (P<0.05). Protein monoglycosylation was evaluated using immunoblotting, affinity blotting, and radioactive labeling. While the variety of modified proteins was greater in tumor tissue compared to adjacent tissue, the total amount of O-GlcNAc monoglycosylation was significantly decreased in the tumor tissue especially on proteins in the molecular mass range of 45-65 kDa. O-GlcNAcase may be involved in the selective removal of O-GlcNAc on certain proteins in breast tumor tissue.
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Affiliation(s)
- C Slawson
- Department of Chemistry and Institute for Biomolecular Science, University of South Florida, 4202 Fowler Avenue, Tampa, FL 33620, USA
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Wu CY, Hsu CC, Chen ST, Tsai YC. Soyasaponin I, a potent and specific sialyltransferase inhibitor. Biochem Biophys Res Commun 2001; 284:466-9. [PMID: 11394903 DOI: 10.1006/bbrc.2001.5002] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A growing number of reports demonstrate that hypersialylation, which is observed in certain pathological processes, such as oncogenic transformation, tumor metastasis, and invasion, is associated with enhanced sialyltransferase (ST) activity. There is therefore a need for the development of ST inhibitors to modulate ST activity and thus alleviate the disease processes caused by STs. In the present study, soyasaponin I had been discovered to be a potent and specific ST inhibitor by screening strategy from 7500 samples including micribial extracts and natural products. Kinetic analysis shows that it is a CMP-Neu5Ac competitive inhibitor with for ST3Gal I with an inhibition constant (K(i)) of 2.1 microM. In addition, it is only active against ST, but not against the other tested glycosyltransferases and glycosidases. Our study is the first report to discover ST inhibitor by screening method and also to provide the new chemical structure information that should be useful in the development of other novel ST inhibitors.
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Affiliation(s)
- C Y Wu
- Institute of Biochemistry, National Yang-Ming University, Taipei, Taiwan
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