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Sansee A, Kostka L, Marcalíková A, Kudláčová J, Sedlák F, Kotrchová L, Šácha P, Etrych T, Kielar F. Iridium-based Polymeric Multifunctional Imaging Tools for Biochemistry. Chempluschem 2024; 89:e202300647. [PMID: 38217401 DOI: 10.1002/cplu.202300647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/15/2024]
Abstract
Herein, we report the development of a macromolecular multifunctional imaging tool for biological investigations, which is comprised of an N-(2-hydroxypropyl)methacrylamide backbone, iridium-based luminescent probe, glutamate carboxypeptidase II (GCPII) targeting ligand, and biotin affinity tag. The iridium luminophore is a tris-cyclometalated complex based on [Ir(ppy)3] with one of its 2-phenylpyridine ligands functionalized to allow conjugation. Synthesized macromolecular probes differed in the structure of the polymer and content of the iridium complex. The applicability of the developed imaging tools has been tested in flow cytometry (FACS) based assay, laser confocal microscopy, and fluorescence lifetime imaging microscopy (FLIM). The FACS analysis has shown that the targeted iBodies containing the iridium luminophore exhibit selective labelling of GCPII expressing cells. This observation was also confirmed in the imaging experiments with laser confocal microscopy. The FLIM experiment has shown that the iBodies with the iridium label exhibit a lifetime greater than 100 ns, which distinguishes them from typically used systems labelled with organic fluorophores exhibiting short fluorescence lifetimes. The results of this investigation indicate that the system exhibits interesting properties, which supports the development of additional biological tools utilizing the key components (iridium complexes, iBody concept), primarily focusing on the longer lifetime of the iridium emitter.
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Affiliation(s)
- Anuson Sansee
- Department of Chemistry and Center of Excellence in Biomaterials, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
| | - Libor Kostka
- Department of Biomedicinal Polymers, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám 2, 160 00, Prague, Czech Republic
| | - Adéla Marcalíková
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám 542/2, 160 00, Prague, Czech Republic
| | - Júlia Kudláčová
- Department of Biomedicinal Polymers, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám 2, 160 00, Prague, Czech Republic
| | - František Sedlák
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám 542/2, 160 00, Prague, Czech Republic
- Department of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, Kateřinská 32, 121 08, Prague, Czech Republic
| | - Lenka Kotrchová
- Department of Biomedicinal Polymers, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám 2, 160 00, Prague, Czech Republic
| | - Pavel Šácha
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám 542/2, 160 00, Prague, Czech Republic
| | - Tomáš Etrych
- Department of Biomedicinal Polymers, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám 2, 160 00, Prague, Czech Republic
| | - Filip Kielar
- Department of Chemistry and Center of Excellence in Biomaterials, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
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Sedlák F, Kvasnička A, Marešová B, Brumarová R, Dobešová D, Dostálová K, Šrámková K, Pehr M, Šácha P, Friedecký D, Konvalinka J. Parallel Metabolomics and Lipidomics of a PSMA/GCPII Deficient Mouse Model Reveal Alteration of NAAG Levels and Brain Lipid Composition. ACS Chem Neurosci 2024; 15:1342-1355. [PMID: 38377674 PMCID: PMC10995945 DOI: 10.1021/acschemneuro.3c00494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 01/10/2024] [Accepted: 02/05/2024] [Indexed: 02/22/2024] Open
Abstract
Glutamate carboxypeptidase II (GCPII, also known as PSMA or FOLH1) is responsible for the cleavage of N-acetyl-aspartyl-glutamate (NAAG) to N-acetyl-aspartate and glutamate in the central nervous system and facilitates the intestinal absorption of folate by processing dietary folyl-poly-γ-glutamate in the small intestine. The physiological function of GCPII in other organs like kidneys is still not known. GCPII inhibitors are neuroprotective in various conditions (e.g., ischemic brain injury) in vivo; however, their utilization as potential drug candidates has not been investigated in regard to not yet known GCPII activities. To explore the GCPII role and possible side effects of GCPII inhibitors, we performed parallel metabolomic and lipidomic analysis of the cerebrospinal fluid (CSF), urine, plasma, and brain tissue of mice with varying degrees of GCPII deficiency (fully deficient in Folh1, -/-; one allele deficient in Folh1, +/-; and wild type, +/+). Multivariate analysis of metabolites showed no significant differences between wild-type and GCPII-deficient mice (except for NAAG), although changes were observed between the sex and age. NAAG levels were statistically significantly increased in the CSF, urine, and plasma of GCPII-deficient mice. However, no difference in NAAG concentrations was found in the whole brain lysate likely because GCPII, as an extracellular enzyme, can affect only extracellular and not intracellular NAAG concentrations. Regarding the lipidome, the most pronounced genotype-linked changes were found in the brain tissue. In brains of GCPII-deficient mice, we observed statistically significant enrichment in phosphatidylcholine-based lipids and reduction of sphingolipids and phosphatidylethanolamine plasmalogens. We hypothesize that the alteration of the NAA-NAAG axis by absent GCPII activity affected myelin composition. In summary, the absence of GCPII and thus similarly its inhibition do not have detrimental effects on metabolism, with just minor changes in the brain lipidome.
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Affiliation(s)
- František Sedlák
- Institute
of Organic Chemistry and Biochemistry, Czech
Academy of Sciences, Prague 6 166 10, Czechia
- Institute
of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, Prague 2 110 01, Czechia
- First
Department of Internal Medicine - Hematology, Charles University General Hospital in Prague, Prague 110 01, Czechia
| | - Aleš Kvasnička
- Laboratory
for Inherited Metabolic Disorders, Department of Clinical Biochemistry, University Hospital Olomouc, and Faculty of Medicine
and Dentistry, Palacký University Olomouc, Zdravotníku° 248/7, Olomouc 779 00, Czechia
| | - Barbora Marešová
- Institute
of Organic Chemistry and Biochemistry, Czech
Academy of Sciences, Prague 6 166 10, Czechia
- Institute
of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, Prague 2 110 01, Czechia
| | - Radana Brumarová
- Laboratory
for Inherited Metabolic Disorders, Department of Clinical Biochemistry, University Hospital Olomouc, and Faculty of Medicine
and Dentistry, Palacký University Olomouc, Zdravotníku° 248/7, Olomouc 779 00, Czechia
| | - Dana Dobešová
- Laboratory
for Inherited Metabolic Disorders, Department of Clinical Biochemistry, University Hospital Olomouc, and Faculty of Medicine
and Dentistry, Palacký University Olomouc, Zdravotníku° 248/7, Olomouc 779 00, Czechia
| | - Kateřina Dostálová
- Laboratory
for Inherited Metabolic Disorders, Department of Clinical Biochemistry, University Hospital Olomouc, and Faculty of Medicine
and Dentistry, Palacký University Olomouc, Zdravotníku° 248/7, Olomouc 779 00, Czechia
| | - Karolína Šrámková
- Institute
of Organic Chemistry and Biochemistry, Czech
Academy of Sciences, Prague 6 166 10, Czechia
| | - Martin Pehr
- Institute
of Organic Chemistry and Biochemistry, Czech
Academy of Sciences, Prague 6 166 10, Czechia
- Third
Department of Medicine − Department of Endocrinology and Metabolism
of the first Faculty of Medicine and General University Hospital in
Prague, Charles University, Prague 110 01, Czechia
| | - Pavel Šácha
- Institute
of Organic Chemistry and Biochemistry, Czech
Academy of Sciences, Prague 6 166 10, Czechia
| | - David Friedecký
- Laboratory
for Inherited Metabolic Disorders, Department of Clinical Biochemistry, University Hospital Olomouc, and Faculty of Medicine
and Dentistry, Palacký University Olomouc, Zdravotníku° 248/7, Olomouc 779 00, Czechia
| | - Jan Konvalinka
- Institute
of Organic Chemistry and Biochemistry, Czech
Academy of Sciences, Prague 6 166 10, Czechia
- Department
of Biochemistry, Faculty of Science, Charles
University, Hlavova 8, Prague 128 00, Czechia
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Lobaz V, Liščáková V, Sedlák F, Musil D, Petrova SL, Šeděnková I, Pánek J, Kučka J, Konefał R, Tihlaříková E, Neděla V, Pankrác J, Šefc L, Hrubý M, Šácha P, Štěpánek P. Tuning polymer-blood and polymer-cytoplasm membrane interactions by manipulating the architecture of poly(2-oxazoline) triblock copolymers. Colloids Surf B Biointerfaces 2023; 231:113564. [PMID: 37742364 DOI: 10.1016/j.colsurfb.2023.113564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 09/26/2023]
Abstract
Bioactive moieties designed to bind to cell membrane receptors benefit from coupling with polymeric carriers that have enhanced affinity to the cell membrane. When bound to the cell surface, such carriers create a "2D solution" of a ligand with a significantly increased concentration near a membrane-bound receptor compared to a freely water-soluble ligand. Bifunctional polymeric carriers based on amphiphilic triblock copolymers were synthesized from 2-pent-4-ynyl oxazoline, 2-nonyl oxazoline and 2-ethyl oxazoline. Their self-assembly and interactions with plasma proteins and HEK 293 cells were studied in detail. The affinity of these triblock copolymers to HEK 293 cell membranes and organ tissues was tunable by the overall hydrophobicity of the polymer molecule, which is determined by the length of the hydrophobic and hydrophilic blocks. The circulation time and biodistribution of three representative triblock copolymers were monitored after intravenous administration to C57BL/6 albino mice. A prolonged circulation time was observed for polymers with longer hydrophobic blocks, despite their molecular weight being below the renal threshold.
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Affiliation(s)
- Volodymyr Lobaz
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského n. 1888/2, 162 06 Prague 6, Czechia.
| | - Veronika Liščáková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 542/2, 160 00 Prague 6, Czechia; Laboratory of Theranostics, Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, U Nemocnice 5, 128 53 Prague 2, Czechia
| | - František Sedlák
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 542/2, 160 00 Prague 6, Czechia; Laboratory of Theranostics, Institute of Biochemistry and Experimental Oncology, First Faculty of Medicine, U Nemocnice 5, 128 53 Prague 2, Czechia
| | - Dominik Musil
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 542/2, 160 00 Prague 6, Czechia; Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 44 Prague 2, Czechia
| | - Svetlana Lukáš Petrova
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského n. 1888/2, 162 06 Prague 6, Czechia
| | - Ivana Šeděnková
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského n. 1888/2, 162 06 Prague 6, Czechia
| | - Jiří Pánek
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského n. 1888/2, 162 06 Prague 6, Czechia
| | - Jan Kučka
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského n. 1888/2, 162 06 Prague 6, Czechia
| | - Rafał Konefał
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského n. 1888/2, 162 06 Prague 6, Czechia
| | - Eva Tihlaříková
- Environmental Electron Microscopy Group, Institute of Scientific Instruments of the Czech Academy of Sciences, Královopolská 147, 61 200 Brno, Czechia
| | - Vilém Neděla
- Environmental Electron Microscopy Group, Institute of Scientific Instruments of the Czech Academy of Sciences, Královopolská 147, 61 200 Brno, Czechia
| | - Jan Pankrác
- Center for Advanced Preclinical Imaging (CAPI), First Faculty of Medicine, Charles University, Salmovská 3, Prague 2, Czechia
| | - Luděk Šefc
- Center for Advanced Preclinical Imaging (CAPI), First Faculty of Medicine, Charles University, Salmovská 3, Prague 2, Czechia
| | - Martin Hrubý
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského n. 1888/2, 162 06 Prague 6, Czechia
| | - Pavel Šácha
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 542/2, 160 00 Prague 6, Czechia
| | - Petr Štěpánek
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského n. 1888/2, 162 06 Prague 6, Czechia
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Fassmannová D, Sedlák F, Sedláček J, Špička I, Grantz Šašková K. Nelfinavir Inhibits the TCF11/Nrf1-Mediated Proteasome Recovery Pathway in Multiple Myeloma. Cancers (Basel) 2020; 12:cancers12051065. [PMID: 32344880 PMCID: PMC7281108 DOI: 10.3390/cancers12051065] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 04/23/2020] [Indexed: 12/26/2022] Open
Abstract
Proteasome inhibitors are the backbone of multiple myeloma therapy. However, disease progression or early relapse occur due to development of resistance to the therapy. One important cause of resistance to proteasome inhibition is the so-called bounce-back response, a recovery pathway driven by the TCF11/Nrf1 transcription factor, which activates proteasome gene re-synthesis upon impairment of the proteasome function. Thus, inhibiting this recovery pathway potentiates the cytotoxic effect of proteasome inhibitors and could benefit treatment outcomes. DDI2 protease, the 3D structure of which resembles the HIV protease, serves as the key player in TCF11/Nrf1 activation. Previous work found that some HIV protease inhibitors block DDI2 in cell-based experiments. Nelfinavir, an oral anti-HIV drug, inhibits the proteasome and/or pAKT pathway and has shown promise for treatment of relapsed/refractory multiple myeloma. Here, we describe how nelfinavir inhibits the TCF11/Nrf1-driven recovery pathway by a dual mode of action. Nelfinavir decreases the total protein level of TCF11/Nrf1 and inhibits TCF11/Nrf1 proteolytic processing, likely by interfering with the DDI2 protease, and therefore reduces the TCF11/Nrf1 protein level in the nucleus. We propose an overall mechanism that explains nelfinavir’s effectiveness in the treatment of multiple myeloma.
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Affiliation(s)
- Dominika Fassmannová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
- Department of Genetics and Microbiology, Charles University, Viničná 5, 12843 Prague, Czech Republic
- First Faculty of Medicine, Charles University, Kateřinská 32, 12108 Prague, Czech Republic
| | - František Sedlák
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
- Department of Genetics and Microbiology, Charles University, Viničná 5, 12843 Prague, Czech Republic
- First Faculty of Medicine, Charles University, Kateřinská 32, 12108 Prague, Czech Republic
- 1st Department Medicine—Department of Hematology, Charles University, U Nemocnice 2, 12808 Prague, Czech Republic
| | - Jindřich Sedláček
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
- Department of Genetics and Microbiology, Charles University, Viničná 5, 12843 Prague, Czech Republic
| | - Ivan Špička
- First Faculty of Medicine, Charles University, Kateřinská 32, 12108 Prague, Czech Republic
- 1st Department Medicine—Department of Hematology, Charles University, U Nemocnice 2, 12808 Prague, Czech Republic
| | - Klára Grantz Šašková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
- Department of Genetics and Microbiology, Charles University, Viničná 5, 12843 Prague, Czech Republic
- Correspondence: ; Tel.: +420-220-183-518
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Vorlová B, Sedlák F, Kašpárek P, Šrámková K, Malý M, Zámečník J, Šácha P, Konvalinka J. A novel PSMA/GCPII-deficient mouse model shows enlarged seminal vesicles upon aging. Prostate 2019; 79:126-139. [PMID: 30256431 DOI: 10.1002/pros.23717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 08/21/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Prostate-specific membrane antigen (PSMA), also known as glutamate carboxypeptidase II (GCPII), is an important diagnostic and therapeutic target in prostate cancer. PSMA/GCPII is also expressed in many healthy tissues, but its function has only been established in the brain and small intestine. Several research groups have attempted to produce PSMA/GCPII-deficient mice to study the physiological role of PSMA/GCPII in detail. The outcomes of these studies differ dramatically, ranging from embryonic lethality to production of viable PSMA/GCPII-deficient mice without any obvious phenotype. METHODS We produced PSMA/GCPII-deficient mice (hereafter also referred as Folh1-/- mice) by TALEN-mediated mutagenesis on a C57BL/6NCrl background. Using Western blot and an enzyme activity assay, we confirmed the absence of PSMA/GCPII in our Folh1-/- mice. We performed anatomical and histopathological examination of selected tissues with a focus on urogenital system. We also examined the PSMA/GCPII expression profile within the mouse urogenital system using an enzyme activity assay and confirmed the presence of PSMA/GCPII in selected tissues by immunohistochemistry. RESULTS Our Folh1-/- mice are viable, breed normally, and do not show any obvious phenotype. Nevertheless, aged Folh1-/- mice of 69-72 weeks exhibit seminal vesicle dilation, which is caused by accumulation of luminal fluid. This phenotype was also observed in Folh1+/- mice; the overall difference between our three cohorts (Folh1-/- , Folh1+/- , and Folh1+/+ ) was highly significant (P < 0.002). Of all studied tissues of the mouse urogenital system, only the epididymis appeared to have a physiologically relevant level of PSMA/GCPII expression. Additional experiments demonstrated that PSMA/GCPII is also present in the human epididymis. CONCLUSIONS In this study, we provide the first evidence characterizing the reproductive tissue phenotype of PSMA/GCPII-deficient mice. These findings will help lay the groundwork for future studies to reveal PSMA/GCPII function in human reproduction.
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Affiliation(s)
- Barbora Vorlová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
- First Faculty of Medicine, Charles University, Prague 2, Czech Republic
| | - František Sedlák
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
- First Faculty of Medicine, Charles University, Prague 2, Czech Republic
- Faculty of Science, Department of Genetics and Microbiology, Charles University, Prague 2, Czech Republic
| | - Petr Kašpárek
- Laboratory of Transgenic Models of Diseases, Institute of Molecular Genetics of the Czech Academy of Sciences, Vestec, Czech Republic
- Czech Centre for Phenogenomics, Institute of Molecular Genetics of the Czech Academy of Sciences, Vestec, Czech Republic
| | - Karolína Šrámková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Marek Malý
- National Institute of Public Health, Prague 10, Czech Republic
| | - Josef Zámečník
- Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague 5, Czech Republic
| | - Pavel Šácha
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Jan Konvalinka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
- Department of Biochemistry, Faculty of Science, Charles University, Prague 2, Czech Republic
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Knedlík T, Vorlová B, Navrátil V, Tykvart J, Sedlák F, Vaculín Š, Franěk M, Šácha P, Konvalinka J. Mouse glutamate carboxypeptidase II (GCPII) has a similar enzyme activity and inhibition profile but a different tissue distribution to human GCPII. FEBS Open Bio 2017; 7:1362-1378. [PMID: 28904865 PMCID: PMC5586342 DOI: 10.1002/2211-5463.12276] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 06/23/2017] [Accepted: 07/19/2017] [Indexed: 11/09/2022] Open
Abstract
Glutamate carboxypeptidase II (GCPII), also known as prostate-specific membrane antigen (PSMA) or folate hydrolase, is a metallopeptidase expressed predominantly in the human brain and prostate. GCPII expression is considerably increased in prostate carcinoma, and the enzyme also participates in glutamate excitotoxicity in the brain. Therefore, GCPII represents an important diagnostic marker of prostate cancer progression and a putative target for the treatment of both prostate cancer and neuronal disorders associated with glutamate excitotoxicity. For the development of novel therapeutics, mouse models are widely used. However, although mouse GCPII activity has been characterized, a detailed comparison of the enzymatic activity and tissue distribution of the mouse and human GCPII orthologs remains lacking. In this study, we prepared extracellular mouse GCPII and compared it with human GCPII. We found that mouse GCPII possesses lower catalytic efficiency but similar substrate specificity compared with the human protein. Using a panel of GCPII inhibitors, we discovered that inhibition constants are generally similar for mouse and human GCPII. Furthermore, we observed highest expression of GCPII protein in the mouse kidney, brain, and salivary glands. Importantly, we did not detect GCPII in the mouse prostate. Our data suggest that the differences in enzymatic activity and inhibition profile are rather small; therefore, mouse GCPII can approximate human GCPII in drug development and testing. On the other hand, significant differences in GCPII tissue expression must be taken into account when developing novel GCPII-based anticancer and therapeutic methods, including targeted anticancer drug delivery systems, and when using mice as a model organism.
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Affiliation(s)
- Tomáš Knedlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Prague Czech Republic.,Department of Biochemistry Faculty of Science Charles University Prague Czech Republic
| | - Barbora Vorlová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Prague Czech Republic.,First Faculty of Medicine Charles University Prague Czech Republic
| | - Václav Navrátil
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Prague Czech Republic.,Department of Biochemistry Faculty of Science Charles University Prague Czech Republic
| | - Jan Tykvart
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Prague Czech Republic.,Department of Biochemistry Faculty of Science Charles University Prague Czech Republic.,Present address: Donnelly Centre for Cellular and Biomolecular Research University of Toronto Toronto ON Canada
| | - František Sedlák
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Prague Czech Republic.,First Faculty of Medicine Charles University Prague Czech Republic.,Department of Genetics and Microbiology Faculty of Science Charles University Prague Czech Republic
| | - Šimon Vaculín
- Department of Normal, Pathological and Clinical Physiology Third Faculty of Medicine Charles University Prague Czech Republic
| | - Miloslav Franěk
- Department of Normal, Pathological and Clinical Physiology Third Faculty of Medicine Charles University Prague Czech Republic
| | - Pavel Šácha
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Prague Czech Republic
| | - Jan Konvalinka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Prague Czech Republic.,Department of Biochemistry Faculty of Science Charles University Prague Czech Republic
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Kostka L, Sedlák F, Blažková K, Etrych T, Šácha P, Šubr V, Konvalinka J. Polymers as tools for studying the internalization of membrane protein glutamate carboxypeptidase II. J Control Release 2017. [DOI: 10.1016/j.jconrel.2017.03.180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sivá M, Svoboda M, Veverka V, Trempe JF, Hofmann K, Kožíšek M, Hexnerová R, Sedlák F, Belza J, Brynda J, Šácha P, Hubálek M, Starková J, Flaisigová I, Konvalinka J, Šašková KG. Human DNA-Damage-Inducible 2 Protein Is Structurally and Functionally Distinct from Its Yeast Ortholog. Sci Rep 2016; 6:30443. [PMID: 27461074 PMCID: PMC4962041 DOI: 10.1038/srep30443] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 07/04/2016] [Indexed: 01/26/2023] Open
Abstract
Although Ddi1-like proteins are conserved among eukaryotes, their biological functions remain poorly characterized. Yeast Ddi1 has been implicated in cell cycle regulation, DNA-damage response, and exocytosis. By virtue of its ubiquitin-like (UBL) and ubiquitin-associated (UBA) domains, it has been proposed to serve as a proteasomal shuttle factor. All Ddi1-like family members also contain a highly conserved retroviral protease-like (RVP) domain with unknown substrate specificity. While the structure and biological function of yeast Ddi1 have been investigated, no such analysis is available for the human homologs. To address this, we solved the 3D structures of the human Ddi2 UBL and RVP domains and identified a new helical domain that extends on either side of the RVP dimer. While Ddi1-like proteins from all vertebrates lack a UBA domain, we identify a novel ubiquitin-interacting motif (UIM) located at the C-terminus of the protein. The UIM showed a weak yet specific affinity towards ubiquitin, as did the Ddi2 UBL domain. However, the full-length Ddi2 protein is unable to bind to di-ubiquitin chains. While proteomic analysis revealed no activity, implying that the protease requires other factors for activation, our structural characterization of all domains of human Ddi2 sets the stage for further characterization.
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Affiliation(s)
- Monika Sivá
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic.,First Faculty of Medicine, Charles University in Prague, Katerinska 32, 121 08, Prague 2, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 128 00 Prague 2, Czech Republic
| | - Michal Svoboda
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic.,Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 00 Prague 2, Czech Republic
| | - Václav Veverka
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | - Jean-François Trempe
- Groupe de Recherche Axé sur la Structure des Protéines, Department of Pharmacology &Therapeutics, McGill University, Montreal, QC, H3G 1Y6, Canada
| | - Kay Hofmann
- Institute for Genetics, University of Cologne, Zülpicher Str. 47a, 50647 Cologne, Germany
| | - Milan Kožíšek
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | - Rozálie Hexnerová
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | - František Sedlák
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic.,First Faculty of Medicine, Charles University in Prague, Katerinska 32, 121 08, Prague 2, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 128 00 Prague 2, Czech Republic
| | - Jan Belza
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 128 00 Prague 2, Czech Republic
| | - Jiří Brynda
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | - Pavel Šácha
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | - Martin Hubálek
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | - Jana Starková
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | - Iva Flaisigová
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic
| | - Jan Konvalinka
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 128 00 Prague 2, Czech Republic
| | - Klára Grantz Šašková
- Gilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 128 00 Prague 2, Czech Republic
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Šácha P, Knedlík T, Schimer J, Tykvart J, Parolek J, Navrátil V, Dvořáková P, Sedlák F, Ulbrich K, Strohalm J, Majer P, Šubr V, Konvalinka J. iBodies: Modular Synthetic Antibody Mimetics Based on Hydrophilic Polymers Decorated with Functional Moieties. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201508642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Pavel Šácha
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
- Department of Biochemistry; Faculty of Science; Charles University; Hlavova 8 12843 Prague 2 Czech Republic
| | - Tomáš Knedlík
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
- Department of Biochemistry; Faculty of Science; Charles University; Hlavova 8 12843 Prague 2 Czech Republic
| | - Jiří Schimer
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
- Department of Biochemistry; Faculty of Science; Charles University; Hlavova 8 12843 Prague 2 Czech Republic
| | - Jan Tykvart
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
- Department of Biochemistry; Faculty of Science; Charles University; Hlavova 8 12843 Prague 2 Czech Republic
| | - Jan Parolek
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
- Department of Biochemistry; Faculty of Science; Charles University; Hlavova 8 12843 Prague 2 Czech Republic
| | - Václav Navrátil
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
- Department of Biochemistry; Faculty of Science; Charles University; Hlavova 8 12843 Prague 2 Czech Republic
| | - Petra Dvořáková
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
| | - František Sedlák
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
- First Faculty of Medicine; Charles University; Kateřinská 32 12108 Prague 2 Czech Republic
| | - Karel Ulbrich
- Institute of Macromolecular Chemistry; Academy of Science of the Czech Republic; Heyrovského n. 2 16206 Prague 6 Czech Republic
| | - Jiří Strohalm
- Institute of Macromolecular Chemistry; Academy of Science of the Czech Republic; Heyrovského n. 2 16206 Prague 6 Czech Republic
| | - Pavel Majer
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
| | - Vladimír Šubr
- Institute of Macromolecular Chemistry; Academy of Science of the Czech Republic; Heyrovského n. 2 16206 Prague 6 Czech Republic
| | - Jan Konvalinka
- Institute of Organic Chemistry and Biochemistry; Academy of Science of the Czech Republic; Flemingovo n. 2 16610 Prague 6 Czech Republic
- Department of Biochemistry; Faculty of Science; Charles University; Hlavova 8 12843 Prague 2 Czech Republic
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10
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Šácha P, Knedlík T, Schimer J, Tykvart J, Parolek J, Navrátil V, Dvořáková P, Sedlák F, Ulbrich K, Strohalm J, Majer P, Šubr V, Konvalinka J. iBodies: Modular Synthetic Antibody Mimetics Based on Hydrophilic Polymers Decorated with Functional Moieties. Angew Chem Int Ed Engl 2016; 55:2356-60. [PMID: 26749427 PMCID: PMC4755222 DOI: 10.1002/anie.201508642] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Indexed: 11/17/2022]
Abstract
Antibodies are indispensable tools for biomedicine and anticancer therapy. Nevertheless, their use is compromised by high production costs, limited stability, and difficulty of chemical modification. The design and preparation of synthetic polymer conjugates capable of replacing antibodies in biomedical applications such as ELISA, flow cytometry, immunocytochemistry, and immunoprecipitation is reported. The conjugates, named “iBodies”, consist of an HPMA copolymer decorated with low‐molecular‐weight compounds that function as targeting ligands, affinity anchors, and imaging probes. We prepared specific conjugates targeting several proteins with known ligands and used these iBodies for enzyme inhibition, protein isolation, immobilization, quantification, and live‐cell imaging. Our data indicate that this highly modular and versatile polymer system can be used to produce inexpensive and stable antibody substitutes directed toward virtually any protein of interest with a known ligand.
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Affiliation(s)
- Pavel Šácha
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 12843, Prague 2, Czech Republic
| | - Tomáš Knedlík
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 12843, Prague 2, Czech Republic
| | - Jiří Schimer
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 12843, Prague 2, Czech Republic
| | - Jan Tykvart
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 12843, Prague 2, Czech Republic
| | - Jan Parolek
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 12843, Prague 2, Czech Republic
| | - Václav Navrátil
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 12843, Prague 2, Czech Republic
| | - Petra Dvořáková
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic
| | - František Sedlák
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic.,First Faculty of Medicine, Charles University, Kateřinská 32, 12108, Prague 2, Czech Republic
| | - Karel Ulbrich
- Institute of Macromolecular Chemistry, Academy of Science of the Czech Republic, Heyrovského n. 2, 16206, Prague 6, Czech Republic
| | - Jiří Strohalm
- Institute of Macromolecular Chemistry, Academy of Science of the Czech Republic, Heyrovského n. 2, 16206, Prague 6, Czech Republic
| | - Pavel Majer
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic
| | - Vladimír Šubr
- Institute of Macromolecular Chemistry, Academy of Science of the Czech Republic, Heyrovského n. 2, 16206, Prague 6, Czech Republic.
| | - Jan Konvalinka
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, Flemingovo n. 2, 16610, Prague 6, Czech Republic. .,Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 12843, Prague 2, Czech Republic.
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11
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Tykvart J, Navrátil V, Sedlák F, Corey E, Colombatti M, Fracasso G, Koukolík F, Bařinka C, Sácha P, Konvalinka J. Comparative analysis of monoclonal antibodies against prostate-specific membrane antigen (PSMA). Prostate 2014; 74:1674-90. [PMID: 25262926 DOI: 10.1002/pros.22887] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 08/05/2014] [Indexed: 12/26/2022]
Abstract
BACKGROUND Prostate-specific membrane antigen (PSMA), also known as glutamate carboxypeptidase II (GCPII), is generally recognized as a diagnostic and therapeutic cancer antigen and a molecular address for targeted imaging and drug delivery studies. Due to its significance in cancer research, numerous monoclonal antibodies (mAbs) against GCPII have been described and marketed in the past decades. Unfortunately, some of these mAbs are poorly characterized, which might lead to their inappropriate use and misinterpretation of the acquired results. METHODS We collected the 13 most frequently used mAbs against GCPII and quantitatively characterized their binding to GCPII by enzyme-linked immunosorbent assay (ELISA) and surface plasmon resonance (SPR). Using a peptide library, we mapped epitopes recognized by a given mAb. Finally, we assessed the applicability of these mAbs to routine experimental setups, including Western blotting, immunohistochemistry, and flow cytometry. RESULTS ELISA and SPR analyses revealed that mAbs J591, J415, D2B, 107-1A4, GCP-05, and 2G7 bind preferentially to GCPII in native form, while mAbs YPSMA-1, YPSMA-2, GCP-02, GCP-04, and 3E6 bind solely to denatured GCPII. mAbs 24.4E6 and 7E11-C5.3 recognize both forms of GCPII. Additionally, we determined that GCP-02 and 3E6 cross-react with mouse GCPII, while GCP-04 recognizes GCPII and GCPIII proteins from both human and mouse. CONCLUSION This comparative analysis provides the first detailed quantitative characterization of the most commonly used mAbs against GCPII and can serve as a guideline for the scientific community to use them in a proper and efficient way.
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Affiliation(s)
- J Tykvart
- Gilead Sciences and IOCB Research Centre, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Czech Republic; Department of Biochemistry, Faculty of Natural Science, Charles University, Czech Republic
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12
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Sedlák F, Šácha P, Blechová M, B&rnezinová A, Šafařík M, Šebestík J, Konvalinka J. Glutamate carboxypeptidase II does not process amyloid‐β peptide. FASEB J 2013; 27:2626-32. [DOI: 10.1096/fj.12-225094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- František Sedlák
- Gilead SciencesPragueCzech Republic
- Institute of Organic Chemistry and Biochemistry (IOCB) Research Center, IOCB, Academy of Sciences of the Czech RepublicPragueCzech Republic
| | - Pavel Šácha
- Gilead SciencesPragueCzech Republic
- Institute of Organic Chemistry and Biochemistry (IOCB) Research Center, IOCB, Academy of Sciences of the Czech RepublicPragueCzech Republic
- Department of BiochemistryFaculty of ScienceCharles UniversityPragueCzech Republic
| | - Miroslava Blechová
- Gilead SciencesPragueCzech Republic
- Institute of Organic Chemistry and Biochemistry (IOCB) Research Center, IOCB, Academy of Sciences of the Czech RepublicPragueCzech Republic
| | - Anna B&rnezinová
- Gilead SciencesPragueCzech Republic
- Institute of Organic Chemistry and Biochemistry (IOCB) Research Center, IOCB, Academy of Sciences of the Czech RepublicPragueCzech Republic
| | - Martin Šafařík
- Gilead SciencesPragueCzech Republic
- Institute of Organic Chemistry and Biochemistry (IOCB) Research Center, IOCB, Academy of Sciences of the Czech RepublicPragueCzech Republic
| | - Jaroslav Šebestík
- Gilead SciencesPragueCzech Republic
- Institute of Organic Chemistry and Biochemistry (IOCB) Research Center, IOCB, Academy of Sciences of the Czech RepublicPragueCzech Republic
| | - Jan Konvalinka
- Gilead SciencesPragueCzech Republic
- Institute of Organic Chemistry and Biochemistry (IOCB) Research Center, IOCB, Academy of Sciences of the Czech RepublicPragueCzech Republic
- Department of BiochemistryFaculty of ScienceCharles UniversityPragueCzech Republic
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13
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Sedlák F, Choluj B. [Lipid, lipoprotein and apolipoprotein levels in men after myocardial infarct]. Vnitr Lek 1987; 33:424-8. [PMID: 3604062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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14
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Choluj B, Zichová M, Vodák M, Klestincová J, Votruba T, Sedlák F. [The importance of lecithin-cholesterol acyltransferase (LCAT) in the detection of early forms of atherosclerosis]. Vnitr Lek 1986; 32:1073-8. [PMID: 3798774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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15
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Choluj B, Votruba T, Klestincová J, Sedlák F, Matyska L, Hrudková M. [Levels of blood apolipoproteins A-I and B in persons with normal blood lipids and persons with hyperlipidemia and proven atherosclerosis]. Vnitr Lek 1985; 31:464-8. [PMID: 3927589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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16
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Choluj B, Votruba T, Sedlák F, Klestincová J, Matyska L. [Plasma levels of apolipoproteins A-I, B and H in men after myocardial infarct]. Cas Lek Cesk 1984; 123:1433-6. [PMID: 6439411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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17
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Zeman B, Velan J, Cervenka V, Sedlák F, Salamoun V, Vycichl J, Prazák M. [Diagnosing atrial septum defect (author's transl)]. Cas Lek Cesk 1979; 118:1378-86. [PMID: 535012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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18
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Sulan Z, Sedlák F, Herout V, Kovár Z, Dobiás V. [On the problem of chronic gastritis in soldiers]. Vojen Zdrav Listy 1965; 34:99-101. [PMID: 5897281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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