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Straka B, Koblížek M, Splítková B, Valkovičová R, Krsková L, Kalinová M, Vlčková M, Zámečník J, Laššuthová P, Sedláčková L, Staněk D, Maulisová A, Tichý M, Kynčl M, Kršek P. A 5-year-old boy with super-refractory status epilepticus and RANBP2 variant warranting life-saving hemispherotomy. Epilepsia Open 2024; 9:424-431. [PMID: 37943122 PMCID: PMC10839359 DOI: 10.1002/epi4.12863] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 07/04/2023] [Accepted: 11/05/2023] [Indexed: 11/10/2023] Open
Abstract
Focal cortical dysplasia (FCD) represents the most common cause of drug-resistant epilepsy in adult and pediatric surgical series. However, genetic factors contributing to severe phenotypes of FCD remain unknown. We present a patient with an exceptionally rapid development of drug-resistant epilepsy evolving in super-refractory status epilepticus. We performed multiple clinical (serial EEG, MRI), biochemical (metabolic and immunological screening), genetic (WES from blood- and brain-derived DNA), and histopathological investigations. The patient presented 1 month after an uncomplicated varicella infection. MRI was negative, as well as other biochemical and immunological examinations. Whole-exome sequencing of blood-derived DNA detected a heterozygous paternally inherited variant NM_006267.4(RANBP2):c.5233A>G p.(Ile1745Val) (Chr2[GRCh37]:g.109382228A>G), a gene associated with a susceptibility to infection-induced acute necrotizing encephalopathy. No combination of anti-seizure medication led to a sustained seizure freedom and the patient warranted induction of propofol anesthesia with high-dose intravenous midazolam and continuous respiratory support that however failed to abort seizure activity. Brain biopsy revealed FCD type IIa; this finding led to the indication of an emergency right-sided hemispherotomy that rendered the patient temporarily seizure-free. Postsurgically, he remains on antiseizure medication and experiences rare nondisabling seizures. This report highlights a uniquely severe clinical course of FCD putatively modified by the RANBP2 variant. PLAIN LANGUAGE SUMMARY: We report a case summary of a patient who came to our attention for epilepsy that could not be controlled with medication. His clinical course progressed rapidly to life-threatening status epilepticus with other unusual neurological findings. Therefore, we decided to surgically remove a piece of brain tissue in order to clarify the diagnosis that showed features of a structural brain abnormality associated with severe epilepsy, the focal cortical dysplasia. Later, a genetic variant in a gene associated with another condition, was found, and we hypothesize that this genetic variant could have contributed to this severe clinical course of our patient.
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Affiliation(s)
- Barbora Straka
- Department of Paediatric NeurologyMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Miroslav Koblížek
- Department of Pathology and Molecular MedicineMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Barbora Splítková
- Department of Paediatric NeurologyMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Radka Valkovičová
- Department of Paediatric NeurologyMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Lenka Krsková
- Department of Pathology and Molecular MedicineMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Markéta Kalinová
- Department of Pathology and Molecular MedicineMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
- Present address:
University Hospital Královské VinohradyŠrobárova 1150/50Prague 10100 34Czech Republic
| | - Markéta Vlčková
- Department of Biology and Medical GeneticsMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Josef Zámečník
- Department of Pathology and Molecular MedicineMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Petra Laššuthová
- Department of Paediatric NeurologyMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Lucie Sedláčková
- Department of Paediatric NeurologyMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - David Staněk
- Second Faculty of Medicine, Charles UniversityPragueCzech Republic
- Present address:
DNAnexus Czech RepublicPernerova 697/35, KarlínPrague186 00Czech Republic
| | - Alice Maulisová
- Department of Clinical PsychologyMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Michal Tichý
- Department of NeurosurgeryMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Martin Kynčl
- Department of RadiologyMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
| | - Pavel Kršek
- Department of Paediatric NeurologyMotol University Hospital and Second Faculty of Medicine, Charles UniversityPragueCzech Republic
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2
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Haratek K, Bubeníková A, Entenmann CJ, Tomášek M, Zápotocký M, Sumerauer D, Kynčl M, Koblížek M, Libý P, Tichý M, Bradáč O, Beneš V. Predictors of postoperative complications and functional outcomes in pediatric patients with surgically treated fourth ventricle tumors. Acta Neurochir (Wien) 2023; 165:4279-4292. [PMID: 37535206 DOI: 10.1007/s00701-023-05729-w] [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: 04/07/2023] [Accepted: 07/11/2023] [Indexed: 08/04/2023]
Abstract
BACKGROUND Tumors of the fourth ventricle are frequently treated pathologies in pediatric neurosurgery. Data regarding predictors for permanent neurological deficits, long-term functional outcomes, cerebellar mutism (CM), the extent of resection (EOR), and oncological outcomes are scarce. We attempt to contribute to this topic with an analysis of our institutional cohort. METHODS A retrospective single-center study of patients aged ≤ 19 years who underwent primary surgical resection of a fourth ventricular tumor over a 15-year period (2006-2021). Predictors analyzed included age, gender, surgical approach, anatomical pattern, tumor grade, EOR, tumor volume, and others as appropriate. RESULTS One hundred six patients were included (64 males, mean age 7.3 years). The rate of permanent neurological deficit was 24.2%; lateral tumor extension (p = 0.036) and tumor volume greater than 38 cm3 (p = 0.020) were significant predictors. The presence of a deficit was the only significant predictor of reduced (less than 90) Lansky score (p = 0.005). CM occurred in 20.8% of patients and was influenced by medulloblastoma histology (p = 0.011), lateral tumor extension (p = 0.017), and male gender (p = 0.021). No significant difference between the transvermian and telovelar approach in the development of CM was detected (p = 0.478). No significant predictor was found for the EOR. EOR was not found to be a significant predictor of overall survival for both low-grade and high-grade tumors; however, gross total resection (GTR) was protective against tumor recurrence compared to near-total or subtotal resection (p < 0.001). In addition, survival was found to be better in older patients (≥ 7.0 years, p = 0.019). CONCLUSION The overall rate of postoperative complications remains high due to the eloquent localization. Older patients (> 7 years) have been found to have better outcomes and prognosis. Achieving GTR whenever feasible and safe has been shown to be critical for tumor recurrence. CM was more common in patients with medulloblastoma and in patients with tumors extending through the foramen of Luschka. The telovelar approach uses a safe and anatomically sparing corridor; however, it has not been associated with a lower incidence of CM and neurological sequelae in our series, showing that each case should be assessed on an individual basis.
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Affiliation(s)
- Kryštof Haratek
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
| | - Adéla Bubeníková
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
- Department of Neurosurgery and Neurooncology, First Faculty of Medicine, Charles University and Military University Hospital, Prague, Czech Republic
| | | | - Martin Tomášek
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic
| | - Michal Zápotocký
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic
- Department of Pediatric Haematology and Oncology, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
| | - David Sumerauer
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic
- Department of Pediatric Haematology and Oncology, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
| | - Martin Kynčl
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic
- Department of Radiology, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
| | - Miroslav Koblížek
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic
- Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
| | - Petr Libý
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic
| | - Michal Tichý
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic
| | - Ondřej Bradáč
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic
- Department of Neurosurgery and Neurooncology, First Faculty of Medicine, Charles University and Military University Hospital, Prague, Czech Republic
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic
| | - Vladimír Beneš
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic.
- Center for Pediatric Neuro-Oncology, University Hospital Motol, V Úvalu 84, 150 06, Prague 5, Prague, Czech Republic.
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3
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Lenz J, Klubíčková N, Ptáková N, Hájková V, Grossmann P, Šteiner P, Kinkor Z, Švajdler M, Michal M, Konečná P, Macháčová D, Hurník P, Tichý M, Tichý F, Kyllar M, Fiala L, Kavka M, Michal M. Extraskeletal myxoid chondrosarcoma: A study of 17 cases focusing on the diagnostic utility of INSM1 expression and presenting rare morphological variants associated with non-EWSR1::NR4A3 fusions. Hum Pathol 2022; 134:19-29. [PMID: 36563884 DOI: 10.1016/j.humpath.2022.12.005] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 11/18/2022] [Accepted: 12/15/2022] [Indexed: 12/25/2022]
Abstract
Extraskeletal myxoid chondrosarcoma (EMC) is a rare sarcoma of uncertain lineage. Insulinoma-associated protein 1 (INSM1) has recently been described as a highly specific and sensitive immunohistochemical marker for EMC. The goal of this study was to evaluate the diagnostic significance of INSM1 immunohistochemistry in EMC. Furthermore, correlations between molecular and morphological findings were performed. Sixteen of 17 EMC cases were stained with the INSM1 antibody. Tumors with at least 5% INSM1-positive cells and any staining intensity were considered positive. Molecular testing was successfully performed in 12/17 cases. The immunohistochemical analysis detected 13 INSM1-positive (81%) and 3 INSM1-negative tumors (19%). The extent of the staining was classified as 1+ in 7 cases (44%), 2+ in 2 cases (13%), 3+ in 2 cases (13%) and 4+ in 2 cases (13%). Intensity of immunostaining was weak in 5 cases (31%), moderate in 2 cases (13%) and strong in 6 cases (38%). Molecular assays revealed 8 EWSR1::NR4A3 positive tumors (67%), 2 TAF15::NR4A3 positive tumors (17%), 1 TCF12::NR4A3 positive tumor (8%) and 1 NR4A3 positive tumor (8%) in which no other gene alteration was identified. Two of them, namely TCF12 positive and one TAF15 positive tumors, were highly cellular and partially associated with pseudopapillary architecture. Our study found that moderate/strong expression of INSM1 in more than 25% of tumor cells was present in only 31% of cases. Thus, the diagnostic utility of INSM1 is rather low. Two morphologically unique cases of non-EWSR1 rearranged EMC with an extremely rare pseudopapillary growth pattern are also reported.
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Affiliation(s)
- Jiří Lenz
- Department of Pathology, Znojmo Hospital, MUDr. Jana Janského 2675/11, 669 02 Znojmo, Czech Republic; Cytohisto S.r.o., Bří. Mrštíků 3065, 690 02 Břeclav, Czech Republic; Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Veterinary Sciences Brno, Palackého Tř. 1946/1, 612 42 Brno, Czech Republic.
| | - Natálie Klubíčková
- Department of Pathology, Faculty of Medicine in Pilsen, Charles University, Husova 3, 301 00 Plzeň, Czech Republic; Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
| | - Nikola Ptáková
- Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
| | - Veronika Hájková
- Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
| | - Petr Grossmann
- Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
| | - Petr Šteiner
- Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
| | - Zdeněk Kinkor
- Department of Pathology, Faculty of Medicine in Pilsen, Charles University, Husova 3, 301 00 Plzeň, Czech Republic; Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
| | - Marián Švajdler
- Department of Pathology, Faculty of Medicine in Pilsen, Charles University, Husova 3, 301 00 Plzeň, Czech Republic; Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
| | - Michal Michal
- Department of Pathology, Faculty of Medicine in Pilsen, Charles University, Husova 3, 301 00 Plzeň, Czech Republic; Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
| | - Petra Konečná
- Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Veterinary Sciences Brno, Palackého Tř. 1946/1, 612 42 Brno, Czech Republic.
| | - Dominika Macháčová
- Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Veterinary Sciences Brno, Palackého Tř. 1946/1, 612 42 Brno, Czech Republic.
| | - Pavel Hurník
- Institute of Molecular and Clinical Pathology and Medical Genetics, Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava, Czech Republic.
| | - Michal Tichý
- Department of Pathology, Masaryk Memorial Cancer Institute, Žlutý Kopec 543/7, 602 00, Brno, Czech Republic.
| | - František Tichý
- Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Veterinary Sciences Brno, Palackého Tř. 1946/1, 612 42 Brno, Czech Republic.
| | - Michal Kyllar
- Institute of Morphology, Department of Pathobiology, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria.
| | - Luděk Fiala
- Cytohisto S.r.o., Bří. Mrštíků 3065, 690 02 Břeclav, Czech Republic; Charles University Prague, First Faculty of Medicine, Kateřinská 1660/32, 121 08 Prague, Czech Republic.
| | - Miroslav Kavka
- Department of Surgery, Znojmo Hospital, MUDr. Jana Janského 2675/11, 669 02 Znojmo, Czech Republic.
| | - Michael Michal
- Department of Pathology, Faculty of Medicine in Pilsen, Charles University, Husova 3, 301 00 Plzeň, Czech Republic; Bioptical Laboratory, Ltd., Mikulášské Nám. 4, 326 00 Pilsen, Czech Republic.
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4
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Yang C, Slavětínská LP, Fleuti M, Klepetářová B, Tichý M, Gurská S, Pavliš P, Džubák P, Hajdúch M, Hocek M. Synthesis of Polycyclic Hetero-Fused 7-Deazapurine Heterocycles and Nucleosides through C-H Dibenzothiophenation and Negishi Coupling. J Am Chem Soc 2022; 144:19437-19446. [PMID: 36245092 PMCID: PMC9619403 DOI: 10.1021/jacs.2c07517] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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] [Indexed: 11/07/2022]
Abstract
![]()
A new approach for synthesizing polycyclic heterofused
7-deazapurine
heterocycles and the corresponding nucleosides was developed based
on C–H functionalization of diverse (hetero)aromatics with
dibenzothiophene-S-oxide followed by the Negishi
cross-cooupling with bis(4,6-dichloropyrimidin-5-yl)zinc. This cross-coupling
afforded a series of (het)aryl-pyrimidines that were converted to
fused deazapurine heterocycles through azidation and thermal cyclization.
The fused heterocycles were glycosylated to the corresponding 2′-deoxy-
and ribonucleosides, and a series of derivatives were prepared by
nucleophilic substitutions at position 4. Four series of new polycyclic
thieno-fused 7-deazapurine nucleosides were synthesized using this
strategy. Most of the deoxyribonucleosides showed good cytotoxic activity,
especially for the CCRF-CEM cell line. Phenyl- and thienyl-substituted
thieno-fused 7-deazapurine nucleosides were fluorescent, and the former
one was converted to 2′-deoxyribonucleoside triphosphate for
enzymatic synthesis of labeled oligonucleotides.
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Affiliation(s)
- Chao Yang
- Department
of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic,Institute
of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Lenka Poštová Slavětínská
- Institute
of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Marianne Fleuti
- Department
of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic,Institute
of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Blanka Klepetářová
- Institute
of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Michal Tichý
- Institute
of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Soňa Gurská
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry
& Czech Advanced Technology and Research Institute, Palacky University and University Hospital in Olomouc, Hněvotínská
5, CZ-77515 Olomouc, Czech Republic
| | - Petr Pavliš
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry
& Czech Advanced Technology and Research Institute, Palacky University and University Hospital in Olomouc, Hněvotínská
5, CZ-77515 Olomouc, Czech Republic
| | - Petr Džubák
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry
& Czech Advanced Technology and Research Institute, Palacky University and University Hospital in Olomouc, Hněvotínská
5, CZ-77515 Olomouc, Czech Republic
| | - Marián Hajdúch
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry
& Czech Advanced Technology and Research Institute, Palacky University and University Hospital in Olomouc, Hněvotínská
5, CZ-77515 Olomouc, Czech Republic
| | - Michal Hocek
- Department
of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic,Institute
of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic,E-mail:
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5
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Petr O, Grassner L, Warner FM, Dedeciusová M, Voldřich R, Geiger P, Brawanski K, Gsellmann S, Meiners LC, Bauer R, Freigang S, Mokry M, Resch A, Kretschmer T, Rossmann T, Navarro FR, Stefanits H, Gruber A, Spendel M, Schwartz C, Griessenauer C, Marhold F, Sherif C, Wais JP, Rössler K, Zagata JJ, Ortler M, Pfisterer W, Mühlbauer M, Trivik-Barrientos FA, Burtscher J, Krška L, Lipina R, Kerekanič M, Fiedler J, Kasík P, Přibáň V, Tichý M, Beneš V, Krůpa P, Česák T, Kroupa R, Callo A, Haninec P, Pohlodek D, Krahulík D, Sejkorová A, Sameš M, Dvořák J, Juričeková A, Buchvald P, Tomáš R, Klener J, Juráň V, Smrčka M, Linzer P, Kaiser M, Hrabovský D, Jančálek R, Kramer JLK, Thomé C, Netuka D. Current trends and outcomes of non-elective neurosurgical care in Central Europe during the second year of the COVID-19 pandemic. Sci Rep 2022; 12:14631. [PMID: 36030282 PMCID: PMC9420122 DOI: 10.1038/s41598-022-18426-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 08/10/2022] [Indexed: 11/09/2022] Open
Abstract
Reflecting the first wave COVID-19 pandemic in Central Europe (i.e. March 16th–April 15th, 2020) the neurosurgical community witnessed a general diminution in the incidence of emergency neurosurgical cases, which was impelled by a reduced number of traumatic brain injuries (TBI), spine conditions, and chronic subdural hematomas (CSDH). This appeared to be associated with restrictions imposed on mobility within countries but also to possible delayed patient introduction and interdisciplinary medical counseling. In response to one year of COVID-19 experience, also mapping the third wave of COVID-19 in 2021 (i.e. March 16 to April 15, 2021), we aimed to reevaluate the current prevalence and outcomes for emergency non-elective neurosurgical cases in COVID-19-negative patients across Austria and the Czech Republic. The primary analysis was focused on incidence and 30-day mortality in emergency neurosurgical cases compared to four preceding years (2017–2020). A total of 5077 neurosurgical emergency cases were reviewed. The year 2021 compared to the years 2017–2019 was not significantly related to any increased odds of 30 day mortality in Austria or in the Czech Republic. Recently, there was a significant propensity toward increased incidence rates of emergency non-elective neurosurgical cases during the third COVID-19 pandemic wave in Austria, driven by their lower incidence during the first COVID-19 wave in 2020. Selected neurosurgical conditions commonly associated with traumatic etiologies including TBI, and CSDH roughly reverted to similar incidence rates from the previous non-COVID-19 years. Further resisting the major deleterious effects of the continuing COVID-19 pandemic, it is edifying to notice that the neurosurgical community´s demeanor to the recent third pandemic culmination keeps the very high standards of non-elective neurosurgical care alongside with low periprocedural morbidity. This also reflects the current state of health care quality in the Czech Republic and Austria.
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Affiliation(s)
- Ondra Petr
- Department of Neurosurgery, Medical University Innsbruck, Innsbruck, Austria. .,Department of Neurosurgery and Neuro-Oncology, 1st Medical Faculty, Central Military Hospital, Charles University, Prague, Czech Republic.
| | - Lukas Grassner
- Department of Neurosurgery, Medical University Innsbruck, Innsbruck, Austria
| | - Freda M Warner
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, BC, Canada
| | - Michaela Dedeciusová
- Department of Neurosurgery and Neuro-Oncology, 1st Medical Faculty, Central Military Hospital, Charles University, Prague, Czech Republic
| | - Richard Voldřich
- Department of Neurosurgery and Neuro-Oncology, 1st Medical Faculty, Central Military Hospital, Charles University, Prague, Czech Republic
| | - Philipp Geiger
- Department of Neurosurgery, Medical University Innsbruck, Innsbruck, Austria
| | | | - Sina Gsellmann
- Department of Neurosurgery, Landeskrankenhaus Feldkirch, Feldkirch, Austria
| | - Laura C Meiners
- Department of Neurosurgery, Landeskrankenhaus Feldkirch, Feldkirch, Austria
| | - Richard Bauer
- Department of Neurosurgery, Landeskrankenhaus Feldkirch, Feldkirch, Austria
| | - Sascha Freigang
- Department of Neurosurgery, Medical University Graz, Graz, Austria
| | - Michael Mokry
- Department of Neurosurgery, Medical University Graz, Graz, Austria
| | - Alexandra Resch
- Department of Neurosurgery & Neurorestauration, Klinikum Klagenfurt, Klagenfurt, Austria
| | - Thomas Kretschmer
- Department of Neurosurgery & Neurorestauration, Klinikum Klagenfurt, Klagenfurt, Austria
| | - Tobias Rossmann
- Department of Neurosurgery, Kepler University Hospital GmbH, Johannes Kepler University, Linz, Austria
| | - Francisco Ruiz Navarro
- Department of Neurosurgery, Kepler University Hospital GmbH, Johannes Kepler University, Linz, Austria
| | - Harald Stefanits
- Department of Neurosurgery, Kepler University Hospital GmbH, Johannes Kepler University, Linz, Austria
| | - Andreas Gruber
- Department of Neurosurgery, Kepler University Hospital GmbH, Johannes Kepler University, Linz, Austria
| | - Mathias Spendel
- Department of Neurosurgery, Christian Doppler Clinic, Paracelsus Medical University, Salzburg, Austria
| | - Christoph Schwartz
- Department of Neurosurgery, Christian Doppler Clinic, Paracelsus Medical University, Salzburg, Austria
| | - Christoph Griessenauer
- Department of Neurosurgery, Christian Doppler Clinic, Paracelsus Medical University, Salzburg, Austria
| | - Franz Marhold
- Department of Neurosurgery, University Hospital of St. Poelten, Karl Landsteiner University of Health Sciences, St. Poelten, Austria
| | - Camillo Sherif
- Department of Neurosurgery, University Hospital of St. Poelten, Karl Landsteiner University of Health Sciences, St. Poelten, Austria
| | - Jonathan P Wais
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Karl Rössler
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Jakob J Zagata
- Unit of Neurosurgery, Klinik Landstrasse, Vienna, Austria
| | - Martin Ortler
- Unit of Neurosurgery, Klinik Landstrasse, Vienna, Austria
| | | | | | | | - Johannes Burtscher
- Department of Neurosurgery, General Hospital Wiener Neustadt, Wiener Neustadt, Austria
| | - Lukáš Krška
- Department of Neurosurgery, University Hospital Ostrava, Ostrava, Czech Republic
| | - Radim Lipina
- Department of Neurosurgery, University Hospital Ostrava, Ostrava, Czech Republic
| | - Martin Kerekanič
- Department of Neurosurgery, Ceske Budejovice Hospital, Ceske Budejovice, Czech Republic
| | - Jiří Fiedler
- Department of Neurosurgery, Ceske Budejovice Hospital, Ceske Budejovice, Czech Republic
| | - Petr Kasík
- Department of Neurosurgery, Pilsen University Hospital, Pilsen, Czech Republic
| | - Vladimír Přibáň
- Department of Neurosurgery, Pilsen University Hospital, Pilsen, Czech Republic
| | - Michal Tichý
- Department of Neurosurgery, Motol University Hospital, Prague, Czech Republic
| | - Vladimír Beneš
- Department of Neurosurgery, Motol University Hospital, Prague, Czech Republic
| | - Petr Krůpa
- Department of Neurosurgery, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Tomáš Česák
- Department of Neurosurgery, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Robert Kroupa
- Unit of Neurosurgery, Municipal Hospital - Ostrava Fifejdy, Ostrava, Czech Republic
| | - Andrej Callo
- Department of Neurosurgery, University Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - Pavel Haninec
- Department of Neurosurgery, University Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - Daniel Pohlodek
- Department of Neurosurgery, University Hospital Olomouc, Olomouc, Czech Republic
| | - David Krahulík
- Department of Neurosurgery, University Hospital Olomouc, Olomouc, Czech Republic
| | - Alena Sejkorová
- Department of Neurosurgery, Usti Nad Labem Hospital, Usti Nad Labem, Czech Republic
| | - Martin Sameš
- Department of Neurosurgery, Usti Nad Labem Hospital, Usti Nad Labem, Czech Republic
| | - Josef Dvořák
- Department of Neurosurgery, Liberec Hospital, Liberec, Czech Republic
| | | | - Pavel Buchvald
- Department of Neurosurgery, Liberec Hospital, Liberec, Czech Republic
| | - Robert Tomáš
- Unit of Neurosurgery, Homolka Hospital, Prague, Czech Republic
| | - Jan Klener
- Unit of Neurosurgery, Homolka Hospital, Prague, Czech Republic
| | - Vilém Juráň
- Department of Neurosurgery, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - Martin Smrčka
- Department of Neurosurgery, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - Petr Linzer
- Unit of Neurosurgery, Zlin Hospital, Zlin, Czech Republic
| | - Miroslav Kaiser
- Unit of Neurosurgery, Pardubice Hospital, Pardubice, Czech Republic
| | - Dušan Hrabovský
- Department of Neurosurgery, St. Anne's University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - Radim Jančálek
- Department of Neurosurgery, St. Anne's University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - John L K Kramer
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, BC, Canada
| | - Claudius Thomé
- Department of Neurosurgery, Medical University Innsbruck, Innsbruck, Austria
| | - David Netuka
- Department of Neurosurgery and Neuro-Oncology, 1st Medical Faculty, Central Military Hospital, Charles University, Prague, Czech Republic
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6
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Kajzar J, Janatová M, Hill M, Otáhal J, Nechlebová E, Tichý M, Krejčí M. Performance of Homebalance Test in an Assessment of Standing Balance in Elderly Adults. Physiol Res 2022; 71:305-315. [DOI: 10.33549/physiolres.934828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Balance control is a critical task of daily life, the ability to maintain upright posture becomes of particular concern during aging when the sensory and motor system becomes deteriorated. Falls contribute to the most deaths caused by injury within the aged population, and the mortality rate following a fall is drastically elevated. Longitudinal and reliable assessment of balance control abilities is a critical point in the prediction of increased risk of falling in an elderly population. The primary aim of the study was to evaluate the efficiency of the Homebalance test in the identification of persons being at higher risk of falling. 135 subjects (82 women and 53 men) with geriatric syndrome have been recruited and the Homebalance and the Tinetti Balance test were performed. Results of both tests strongly correlated proving the good performance of the Homebalance test. Standing balance declines with increasing body mass index in both genders. Analysis of fluctuations of the center of pressure (COP) revealed higher frequency and magnitude in mediolateral direction COP movements when compared women to men. A strong negative correlation has been found between Tinetti static balance score and the total length of the COP trajectory during the examination on Homebalance (r = -0.6, p<0.001). Although both methods revealed good performance in detecting balance impairment, Homebalance test possesses higher precision due to the continuous nature of COP-derived parameters. In conclusion, our data proved that the Homebalance test is capable to identify persons with impaired balance control and thus are at higher risk of falling.
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Affiliation(s)
- J Kajzar
- College of Physical Education and Sport PALESTRA, Prague, Czech Republic.
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7
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Sýkorová V, Tichý M, Hocek M. Polymerase Synthesis of DNA Containing Iodinated Pyrimidine or 7-Deazapurine Nucleobases and Their Post-synthetic Modifications through the Suzuki-Miyaura Cross-Coupling Reactions. Chembiochem 2021; 23:e202100608. [PMID: 34821441 DOI: 10.1002/cbic.202100608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/24/2021] [Indexed: 11/08/2022]
Abstract
All four iodinated 2'-deoxyribonucleoside triphosphates (dNTPs) derived from 5-iodouracil, 5-iodocytosine, 7-iodo-7-deazaadenine and 7-iodo-7-deazaguanine were prepared and studied as substrates for KOD XL DNA polymerase. All of the nucleotides were readily incorporated by primer extension and by PCR amplification to form DNA containing iodinated nucleobases. Systematic study of the Suzuki-Miyaura cross-coupling reactions with two bulkier arylboronic acids revealed that the 5-iodopyrimidines were more reactive and gave cross-coupling products both in the terminal or internal position in single-stranded oligonucleotides (ssONs) and in the terminal position of double-stranded DNA (dsDNA), whereas the 7-iodo-7-deazapurines were less reactive and gave cross-coupling products only in the terminal position. None of the four iodinated bases reacted in an internal position of dsDNA. These findings are useful for the use of the iodinated nucleobases for post-synthetic modification of DNA with functional groups for various applications.
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Affiliation(s)
- Veronika Sýkorová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, 16610, Prague 6, Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, 16610, Prague 6, Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, 16610, Prague 6, Czech Republic.,Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 12843, Prague 2, Czech Republic
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8
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Nguyen VH, Tichý M, Rožánková S, Pohl R, Downey AM, Doleželová E, Tloušťová E, Slapničková M, Zíková A, Hocek M. Synthesis and anti-trypanosomal activity of 3'-fluororibonucleosides derived from 7-deazapurine nucleosides. Bioorg Med Chem Lett 2021; 40:127957. [PMID: 33741462 DOI: 10.1016/j.bmcl.2021.127957] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 02/25/2021] [Accepted: 02/27/2021] [Indexed: 10/21/2022]
Abstract
Trypanosoma brucei parasites cause Human African Trypanosomiasis and the current drugs for its treatment are often inefficient and toxic. This urges the need to development of new antitrypanosomal agents. We report the synthesis and biological profiling of 3'-deoxy-3'-fluororibonucleosides derived from 7-deazaadenine nucleosides bearing diverse substituents at position 7. They were synthesized through glycosylation of 6-chloro-7-bromo- or -7-iodo-7-deazapurine with protected 3'-fluororibose followed by cross-coupling reactions at position 7 and/or deprotection. Most of the title nucleosides displayed micromolar or submicromolar activity against Trypanosoma brucei brucei. The most active were the 7-bromo- and 7-iododerivatives which exerted double-digit nanomolar activity against T. b. brucei and T. b. gambiense and no cytotoxicity and thus represent promising candidates for further development.
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Affiliation(s)
- Van Hai Nguyen
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague 6, Czech Republic; Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague 6, Czech Republic
| | - Samanta Rožánková
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague 6, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague 6, Czech Republic
| | - A Michael Downey
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague 6, Czech Republic
| | - Eva Doleželová
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, CZ-37005 České Budějovice, Czech Republic
| | - Eva Tloušťová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague 6, Czech Republic
| | - Martina Slapničková
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, CZ-37005 České Budějovice, Czech Republic
| | - Alena Zíková
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, CZ-37005 České Budějovice, Czech Republic.
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16000 Prague 6, Czech Republic; Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic.
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9
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Mišove A, Krsková L, Sumerauer D, Zámečník J, Váňová K, Starý J, Perníková I, Vícha A, Libý P, Tichý M, Táborský J, Kynčl M, Zápotocký M. LGG-46. MOLECULAR CHARACTERIZATION OF HEMISPHERIC LOW-GRADE GLIOMAS IN CHILDREN. Neuro Oncol 2020. [PMCID: PMC7715722 DOI: 10.1093/neuonc/noaa222.424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Heterogeneous pathology in hemispheric low-grade gliomas (hemLGG) stress the importance of molecular testing in terms of prognosis prediction and targeted therapy options. METHODS Demographic data was collected and targeted genomic approach was employed in the single institutional study. RT-PCR was used to screen for KIAA1549-BRAF fusion and FGFR1 tyrosine-kinase domain duplication (FGFR1-ITD). Direct sequencing evaluated point mutations (BRAF ex15 and ex11, FGFR1 ex12 and ex14). Samples with no detected alteration were subjected to panel RNA-sequencing (FusionPlex Archer Diagnostics). RESULTS Within 2000–2019 were diagnosed 76 patients with hemLGG (median age 11.1y, range 0.0y–18.5y) comprising predominantly of ganglioglioma, dysembryoplastic neuroepithelial tumors, and diffuse astrocytoma. 40 % of hemLGG were characterized by BRAF alterations with over 2/3 of those cases harboring BRAF point mutations (two BRAFex11, 12 BRAFV600E). Notably, BRAF fusions were uncommon and detected only in six patients (two KIAA-BRAF fusion, two minor oncogenic BRAF variants, two non-KIAA BRAF fusion). 25 % of alterations were found in genes for receptor tyrosine kinases, consisting of seven patients with FGFR1-ITD, three FGFR2/3 fusions, two FGFR1 mutations, two ALK fusions, and one ROS fusion. Out of MAP kinase pathway, the most frequent alteration was IDH1 mutations (n=9). Two angiocentric gliomas were characterized by MYB-QKI fusion. CONCLUSION Targeted sequencing combined with RNA-sequencing is feasible to establish molecular diagnosis in majority of cases and reveal new and rare alterations. Significant prevalence of non-BRAF alterations explains heterogeneity among hemLGG.
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Affiliation(s)
- Adéla Mišove
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Lenka Krsková
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - David Sumerauer
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Josef Zámečník
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Kateřina Váňová
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jan Starý
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Ivana Perníková
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Aleš Vícha
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Petr Libý
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Michal Tichý
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jakub Táborský
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Martin Kynčl
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Michal Zápotocký
- University Hospital Motol, Second Faculty of Medicine, Charles University, Prague, Czech Republic
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10
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Bláha M, Tichý M. Implanted vagus nerve stimulation in 126 patients: surgical technique and complications. Rozhl Chir 2020; 99:304-310. [PMID: 32972148 DOI: 10.33699/pis.2020.99.7.304-310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
INTRODUCTION Vagus nerve stimulation is a palliative treatment for patients with refractory epilepsy to reduce the frequency and intensity of seizures. A bipolar helical electrode is placed around the left vagus nerve at the cervical level and is connected to the pulse generator placed in a subcutaneous pocket, most commonly in the subclavian region. METHODS Between March 1998 and October 2019, we performed 196 procedures related to the vagal nerve stimulation at the Neurosurgery Department in Motol University Hospital. Of these, 126 patients were vagal nerve stimulator implantation surgeries for intractable epilepsy. The cases included 69 female and 57 male patients with mean age at the time of the implantation surgery 22±12.4 years (range 2.158.4 years). RESULTS Nine patients (7.1%) were afflicted by complications related to implantation. Surgical complications included postoperative infection in 1.6%, VNS-associated arrhythmias in 1.6%, jugular vein bleeding in 0.8% and vocal cord paresis in 2.4%. One patient with vocal cord palsy also suffered from severe dysphagia. One patient (0.8%) did not tolerate extra stimulation with magnet due to a prolonged spasm in his throat. The extra added benefit of vagus stimulation in one patient was a significant reduction of previously regular severe headaches. CONCLUSION Vagus nerve stimulation is an appropriate treatment for patients with drug-resistant epilepsy who are not candidates for focal resective surgery. Implantation of the vagus nerve stimulator is a relatively safe operative procedure.
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11
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Veselovská L, Kudlová N, Gurská S, Lišková B, Medvedíková M, Hodek O, Tloušťová E, Milisavljevic N, Tichý M, Perlíková P, Mertlíková‐Kaiserová H, Trylčová J, Pohl R, Klepetářová B, Džubák P, Hajdúch M, Hocek M. Synthesis and Cytotoxic and Antiviral Activity Profiling of All‐Four Isomeric Series of Pyrido‐Fused 7‐Deazapurine Ribonucleosides. Chemistry 2020; 26:13002-13015. [DOI: 10.1002/chem.202001124] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Lucia Veselovská
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Natálie Kudlová
- Institute of Molecular and Translational Medicine Faculty of Medicine and Dentistry Palacky University and University Hospital in Olomouc Hněvotínská 5 775 15 Olomouc Czech Republic
- Cancer Research Czech Republic Hněvotínská 5 775 15 Olomouc Czech Republic
| | - Soňa Gurská
- Institute of Molecular and Translational Medicine Faculty of Medicine and Dentistry Palacky University and University Hospital in Olomouc Hněvotínská 5 775 15 Olomouc Czech Republic
- Cancer Research Czech Republic Hněvotínská 5 775 15 Olomouc Czech Republic
| | - Barbora Lišková
- Institute of Molecular and Translational Medicine Faculty of Medicine and Dentistry Palacky University and University Hospital in Olomouc Hněvotínská 5 775 15 Olomouc Czech Republic
| | - Martina Medvedíková
- Institute of Molecular and Translational Medicine Faculty of Medicine and Dentistry Palacky University and University Hospital in Olomouc Hněvotínská 5 775 15 Olomouc Czech Republic
| | - Ondřej Hodek
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Eva Tloušťová
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Nemanja Milisavljevic
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
- Department of Organic Chemistry Faculty of Science Charles University in Prague Hlavova 8 12843 Prague 2 Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Pavla Perlíková
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Helena Mertlíková‐Kaiserová
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Jana Trylčová
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Blanka Klepetářová
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine Faculty of Medicine and Dentistry Palacky University and University Hospital in Olomouc Hněvotínská 5 775 15 Olomouc Czech Republic
- Cancer Research Czech Republic Hněvotínská 5 775 15 Olomouc Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine Faculty of Medicine and Dentistry Palacky University and University Hospital in Olomouc Hněvotínská 5 775 15 Olomouc Czech Republic
- Cancer Research Czech Republic Hněvotínská 5 775 15 Olomouc Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague 6 Czech Republic
- Department of Organic Chemistry Faculty of Science Charles University in Prague Hlavova 8 12843 Prague 2 Czech Republic
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12
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Fleuti M, Bártová K, Slavětínská LP, Tloušt'ová E, Tichý M, Gurská S, Pavliš P, Džubák P, Hajdúch M, Hocek M. Synthesis and Biological Profiling of Pyrazolo-Fused 7-Deazapurine Nucleosides. J Org Chem 2020; 85:10539-10551. [PMID: 32692916 DOI: 10.1021/acs.joc.0c00928] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of 8-substituted 1-methyl-1,4-dihydropyrazolo[3',4':4,5]pyrrolo[2,3-d]pyrimidine (methylpyrazolo-fused 7-deazapurine) ribonucleosides have been designed and synthesized. Two synthetic approaches to the key heterocyclic aglycon 7, (i) a six-step classical heterocyclization starting from 5-chloro-1-methyl-4-nitropyrazole and (ii) a three-step cross-coupling and cyclization approach starting from the zincated 4,6-dichloropyrimidine, gave comparable total yields of 18% vs 13%. The glycosylation of 7 was attempted by three different methods but only the Vorbrüggen silyl-base protocol was efficient and stereoselective to give desired β-anomeric nucleoside intermediate 17A. Its nucleophilic substitutions or cross-coupling reactions at position 8 and deprotection of the sugar moiety gave eight derivatives of pyrazolo-fused deazapurine ribonucleosides, some of which were weakly fluorescent. Methyl, amino, and methylsulfanyl derivatives exerted submicromolar cytotoxic effects in vitro against a panel of cancer and leukemia cell lines as well as antiviral effects against hepatitis C virus in the replicon assay.
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Affiliation(s)
- Marianne Fleuti
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic.,Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Kateřina Bártová
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic.,Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Lenka Poštová Slavětínská
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Eva Tloušt'ová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Soňa Gurská
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry, Hněvotínská 5, CZ-77515 Olomouc, Czech Republic
| | - Petr Pavliš
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry, Hněvotínská 5, CZ-77515 Olomouc, Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry, Hněvotínská 5, CZ-77515 Olomouc, Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry, Hněvotínská 5, CZ-77515 Olomouc, Czech Republic
| | - Michal Hocek
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic.,Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
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13
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Yang C, Pohl R, Tichý M, Gurská S, Pavliš P, Džubák P, Hajdúch M, Hocek M. Synthesis, Photophysical Properties, and Biological Profiling of Benzothieno-Fused 7-Deazapurine Ribonucleosides. J Org Chem 2020; 85:8085-8101. [PMID: 32432875 DOI: 10.1021/acs.joc.0c00927] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Two isomeric series of benzothieno-fused 7-deazapurine (benzo[4',5']thieno[3',2':4,5]- and benzo[4',5']thieno[2',3':4,5]pyrrolo[2,3-d]pyrimidine) ribonucleosides were designed and synthesized. Key steps of the synthesis included the Negishi coupling of zincated dichloropyrimidine with 2- or 3-iodobenzothiophene followed by azidation, thermal or photochemical cyclization, glycosylation, and final functionalization at position 6 through cross-couplings or nucleophilic substitutions. Deprotection gave the final nucleosides, some of which showed moderate cytotoxic and antiviral activity. Most of the free nucleosides showed moderate to strong fluorescence with emission maxima of 362-554 nm. 2'-Deoxyribonucleoside and its 5'-O-triphosphate were also prepared from benzothieno-fused 7-deazaadenine derivative, and the triphosphate was a good substrate for KOD XL DNA polymerase in primer extension synthesis of modified DNA which exerted a weak fluorescence which was slightly enhanced in double-stranded DNA as compared to single-stranded oligonucleotides.
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Affiliation(s)
- Chao Yang
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic.,Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Soňa Gurská
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry, Hněvotínská 5, CZ-77515 Olomouc, Czech Republic
| | - Petr Pavliš
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry, Hněvotínská 5, CZ-77515 Olomouc, Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry, Hněvotínská 5, CZ-77515 Olomouc, Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry, Hněvotínská 5, CZ-77515 Olomouc, Czech Republic
| | - Michal Hocek
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic.,Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
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14
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Jahodová A, Beňová B, Kudr M, Ježdík P, Janča R, Bělohlávková A, Liby P, Leško R, Tichý M, Čelakovský P, Kršek P. A novel effective paradigm of intraoperative electrical stimulation mapping in children. J Neurosurg Pediatr 2020; 26:150-156. [PMID: 32302987 DOI: 10.3171/2020.2.peds19451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 02/05/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Resective epilepsy surgery is an established treatment method for children with focal intractable epilepsy, but the use of this method introduces the risk of postsurgical motor deficits. Electrical stimulation mapping (ESM), used to define motor areas and pathways, frequently fails in children. The authors developed and tested a novel ESM protocol in children of all age categories. METHODS The ESM protocol utilizes high-frequency electric cortical stimulation combined with continuous intraoperative motor-evoked potential (MEP) monitoring. The relationships between stimulation current intensity and selected presurgical and surgery-associated variables were analyzed in 66 children (aged 7 months to 18 years) undergoing 70 resective epilepsy surgeries in proximity to the motor cortex or corticospinal tracts. RESULTS ESM elicited MEP responses in all children. Stimulation current intensity was associated with patient age at surgery and date of surgery (F value = 6.81, p < 0.001). Increase in stimulation current intensity predicted postsurgical motor deficits (F value = 44.5, p < 0.001) without effects on patient postsurgical seizure freedom (p > 0.05). CONCLUSIONS The proposed ESM paradigm developed in our center represents a reliable method for preventing and predicting postsurgical motor deficits in all age groups of children. This novel ESM protocol may increase the safety and possibly also the completeness of epilepsy surgery. It could be adopted in pediatric epilepsy surgery centers.
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Affiliation(s)
| | | | | | | | - Radek Janča
- 4Circuit Theory, Faculty of Electrical Engineering, Czech Technical University in Prague, Czech Republic
| | | | - Petr Liby
- 3Neurosurgery, Second Faculty of Medicine and Motol University Hospital; and
| | - Róbert Leško
- 3Neurosurgery, Second Faculty of Medicine and Motol University Hospital; and
| | - Michal Tichý
- 3Neurosurgery, Second Faculty of Medicine and Motol University Hospital; and
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Havlíčková J, Dolejšová K, Tichý M, Vrkoslav V, Kalinová B, Kyjaková P, Hanus R. (3R,6E)-nerolidol, a fertility-related volatile secreted by the queens of higher termites (Termitidae: Syntermitinae). ACTA ACUST UNITED AC 2020; 74:251-264. [PMID: 30920958 DOI: 10.1515/znc-2018-0197] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/02/2019] [Indexed: 11/15/2022]
Abstract
The queens of advanced social insects maintain their reproductive monopoly by using exocrine chemicals. The chemistry of these "queen pheromones" in termites is poorly known. We show that primary queens of four higher termites from the subfamily Syntermitinae (Embiratermes neotenicus, Silvestritermes heyeri, Labiotermes labralis, and Cyrilliotermes angulariceps) emit significant amounts of the sesquiterpene alcohol (E)-nerolidol. It is the dominant analyte in queen body washes; it is present on the surface of eggs, but absent in kings, workers, and soldiers. In E. neotenicus, it is also produced by replacement neotenic queens, in quantities correlated with their fertility. Using newly synthesised (3R,6E)-nerolidol, we demonstrate that the queens of this species produce only the (R) enantiomer. It is distributed over the surface of their abdomen, in internal tissues, and in the haemolymph, as well as in the headspace of the queens. Both (R) and (S) enantiomers are perceived by the antennae of E. neotenicus workers. The naturally occurring (R) enantiomer elicited a significantly larger antennal response, but it did not show any behavioural effect. In spite of technical difficulties encountered in long-term experiments with the studied species, (3R,6E)-nerolidol remains among eventual candidates for the role in queen fertility signalling.
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Affiliation(s)
- Jana Havlíčková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610, Prague, Czech Republic
| | - Klára Dolejšová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610, Prague, Czech Republic.,Faculty of Science, Charles University in Prague, Prague, Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610, Prague, Czech Republic
| | - Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610, Prague, Czech Republic
| | - Blanka Kalinová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610, Prague, Czech Republic.,Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Prague, Czech Republic
| | - Pavlína Kyjaková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610, Prague, Czech Republic
| | - Robert Hanus
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610, Prague, Czech Republic
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16
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Benova B, Belohlavkova A, Jezdik P, Jahodová A, Kudr M, Komarek V, Novak V, Liby P, Lesko R, Tichý M, Kyncl M, Zamecnik J, Krsek P, Maulisova A. Cognitive performance in distinct groups of children undergoing epilepsy surgery-a single-centre experience. PeerJ 2019; 7:e7790. [PMID: 31608172 PMCID: PMC6788437 DOI: 10.7717/peerj.7790] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 08/29/2019] [Indexed: 11/27/2022] Open
Abstract
Background We aimed first to describe trends in cognitive performance over time in a large patient cohort (n = 203) from a single tertiary centre for paediatric epilepsy surgery over the period of 16 years divided in two (developing—pre-2011 vs. established—post-2011). Secondly, we tried to identify subgroups of epilepsy surgery candidates with distinctive epilepsy-related characteristics that associate with their pre- and post-surgical cognitive performance. Thirdly, we analysed variables affecting pre-surgical and post-surgical IQ/DQ and their change (post- vs. pre-surgical). Methods We analysed IQ/DQ data obtained using standardized neuropsychological tests before epilepsy surgery and one year post-surgically, along with details of patient’s epilepsy, epilepsy surgery and outcomes in terms of freedom from seizures. Using regression analysis, we described the trend in post-operative IQ/DQ. Cognitive outcomes and the associated epilepsy- and epilepsy surgery-related variables were compared between periods before and after 2011. Using multivariate analysis we analysed the effect of individual variables on pre- and post-operative IQ/DQ and its change. Results Epilepsy surgery tends to improve post-surgical IQ/DQ, most significantly in patients with lower pre-surgical IQ/DQ, and post-surgical IQ/DQ strongly correlates with pre-surgical IQ/DQ (Rho = 0.888, p < 0.001). We found no significant difference in pre-, post-surgical IQ/DQ and IQ/DQ change between the periods of pre-2011 and post-2011 (p = 0.7, p = 0.469, p = 0.796, respectively). Patients with temporal or extratemporal epilepsy differed in their pre-surgical IQ/DQ (p = 0.001) and in IQ/DQ change (p = 0.002) from those with hemispheric epilepsy, with no significant difference in post-surgical IQ/DQ (p = 0.888). Groups of patients with different underlying histopathology showed significantly different pre- and post-surgical IQ/DQ (p < 0.001 and p < 0.001 respectively) but not IQ/DQ change (p = 0.345).Variables associated with severe epilepsy showed effect on cognitive performance in multivariate model. Discussion Post-surgical IQ/DQ strongly correlates with pre-surgical IQ/DQ and greatest IQ/DQ gain occurs in patients with lower pre-surgical IQ/DQ scores. Cognitive performance was not affected by changes in paediatric epilepsy surgery practice. Pre- and post-operative cognitive performances, as well as patients’ potential for cognitive recovery, are highly dependent on the underlying aetiology and epileptic syndrome.
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Affiliation(s)
- Barbora Benova
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Paediatric Neurology, Motol University Hospital, Prague, Czech Republic
| | - Anezka Belohlavkova
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Paediatric Neurology, Motol University Hospital, Prague, Czech Republic
| | - Petr Jezdik
- Faculty of Electrical Engineering, Department of Circuit Theory, Czech Technical University of Prague, Prague, Czech Republic
| | - Alena Jahodová
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Paediatric Neurology, Motol University Hospital, Prague, Czech Republic
| | - Martin Kudr
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Paediatric Neurology, Motol University Hospital, Prague, Czech Republic
| | - Vladimir Komarek
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Paediatric Neurology, Motol University Hospital, Prague, Czech Republic
| | - Vilem Novak
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Paediatric Neurology, Ostrava Faculty Hospital, Ostrava, Czech Republic
| | - Petr Liby
- Department of Neurosurgery, Motol University Hospital, Prague, Czech Republic
| | - Robert Lesko
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Neurosurgery, Motol University Hospital, Prague, Czech Republic
| | - Michal Tichý
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Neurosurgery, Motol University Hospital, Prague, Czech Republic
| | - Martin Kyncl
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Radiology, Motol Universiy Hospital, Prague, Czech Republic
| | - Josef Zamecnik
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Pathology and Molecular Medicine, Motol University Hospital, Prague, Czech Republic
| | - Pavel Krsek
- 2nd Faculty of Medicine, Charles University Prague, Prague, Czech Republic.,Department of Paediatric Neurology, Motol University Hospital, Prague, Czech Republic
| | - Alice Maulisova
- Department of Clinical Psychology, Motol University Hospital, Prague, Czech Republic
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Buksakowska I, Szabó N, Martinkovič L, Faragó P, Király A, Vrána J, Kincses ZT, Meluzín J, Šulc V, Kynčl M, Roček M, Tichý M, Charvát F, Hořínek D, Marusič P. Distinctive Patterns of Seizure-Related White Matter Alterations in Right and Left Temporal Lobe Epilepsy. Front Neurol 2019; 10:986. [PMID: 31632330 PMCID: PMC6779711 DOI: 10.3389/fneur.2019.00986] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 05/28/2019] [Accepted: 08/29/2019] [Indexed: 12/14/2022] Open
Abstract
Background: We hypothesized that right and left temporal lobe epilepsy (RTLE and LTLE, respectively) have distinctive spatial patterns of white matter (WM) changes that can be differentiated and interpreted with the use of multiple diffusion parameters. We compared the global microstructure of fiber bundles with regard to WM alterations in both RTLE and LTLE, addressing some of the methodological issues of previous studies. Methods: Diffusion tensor imaging data from 17 patients with RTLE (age: 40.7 ± 10.4), 15 patients with LTLE (age: 37.3 ± 10.4), and 15 controls (age: 34.8 ± 11.2) were used in the study. WM integrity was quantified by fractional anisotropy (FA), mean diffusivity (MD), longitudinal diffusivity (LD), and radial diffusivity (RD). The diffusion parameters were compared between the groups in tracts representing the core of the fiber bundles. The volumes of hippocampi and amygdala were subsequently compared across the groups, while the data were adjusted for the effect of hippocampal sclerosis. Results: Significantly reduced FA and increased MD, LD, and RD were found bilaterally over widespread brain regions in RTLE. An increase in MD and RD values was observed in widespread WM fiber bundles ipsilaterally in LTLE, largely overlapping with regions where FA was lower, while no increase in LD was observed. We also found a difference between the LTLE and RTLE groups for the right hippocampal volume (with and without adjustment for HS), whereas no significant volume differences were found between patients and controls. Conclusions: It appears that patients with RTLE exhibit a more widespread pattern of WM alterations that extend far beyond the temporal lobe in both ipsilateral and contralateral hemisphere; furthermore, these changes seem to reflect more severe damage related to chronic degeneration. Conversely, more restrained changes in the LTLE may imply a pattern of less severe axonal damage, more restricted to ipsilateral hemisphere. Comprehensive finding of more prominent hippocampal atrophy in the RTLE raises an interesting issue of seizure-induced implications on gray matter and WM microstructure that may not necessarily mean a straightforward causal relationship. Further correlations of diffusion-derived metrics with neuropsychological and functional imaging measures may provide complementary information on underlying WM abnormalities with regard to functional hemispheric specialization.
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Affiliation(s)
- Irena Buksakowska
- Department of Radiology, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
| | - Nikoletta Szabó
- Department of Neurology, Faculty of General Medicine, University of Szeged, Szeged, Hungary
| | - Lukáš Martinkovič
- Department of Neurology, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
| | - Péter Faragó
- Department of Neurology, Faculty of General Medicine, University of Szeged, Szeged, Hungary
| | - András Király
- Department of Neurology, Faculty of General Medicine, University of Szeged, Szeged, Hungary
| | - Jiří Vrána
- Department of Radiodiagnostics, University Central Military Hospital, Prague, Czechia
| | - Zsigmond Tamás Kincses
- Department of Neurology, Faculty of General Medicine, University of Szeged, Szeged, Hungary
| | - Jan Meluzín
- Department of Radiology, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
| | - Vlastimil Šulc
- Department of Neurology, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
| | - Martin Kynčl
- Department of Radiology, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
| | - Miloslav Roček
- Department of Radiology, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
| | - Michal Tichý
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
| | - František Charvát
- Department of Radiodiagnostics, University Central Military Hospital, Prague, Czechia
| | - Daniel Hořínek
- Department of Neurosurgery, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
| | - Petr Marusič
- Department of Neurology, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czechia
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18
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Tichý M, Ptáčková H, Plančíková D, Majdan M, Chodacká M. BMI and Odds of Endometrial Adenocarcinoma in Czech Women - a Case Control Study. Klin Onkol 2019; 32:281-287. [PMID: 31426644 DOI: 10.14735/amko2019281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
INTRODUCTION The incidence of malignant tumors of the uterine body is increasing in the Czech Republic. Endometrial adenocarcinoma is one of the most frequent morphological types. Obesity or even overweight is a risk factor for the development of this disease. More accurate stratification of risk relative to body mass index (BMI) has not yet been determined in the Czech Republic, although the risk of overweight (BMI 25-29.9) has been reported in one study as comparable to that of first or second degree obesity (BMI 30-30.9). PATIENTS AND METHODS The study population included 376 women of Caucasian race diagnosed with endometrial adenocarcinoma, with BMI measured simultaneously, in 2005-2017. A control group consisted of an equal number of age-matched women not diagnosed with any oncological or gynecological disease. These two files were statistically processed. RESULTS Odds (OR, 95% CI) relative to normal weight women, overweight women were at 2.26-times higher odds of endometrial adenocarcinoma, and women with obesity were at 5.18-8.67-, and 24.70-times higher odds, depending on the severity of obesity. CONCLUSION The hypothesis that overweight represents same risk for the development of endometrial adenocarcinoma, as lower degrees of obesity was not verified. However overweight is serious risk for endometrial adenocarcinoma development. The odds of endometrial adenocarcinoma is correlated with increasing BMI and in the population studied is higher than reported previously for all endometrial carcinoma subtypes. This work was carried out with the support of an internal grant of Krajská zdravotní, a.s., for the years 2017-2019: IGA217129002. The authors declare they have no potential conflicts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE recommendation for biomedical papers. Submitted: 29. 4. 2019 Accepted: 22. 7. 2019.
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19
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Strašková A, Steinbach G, Konert G, Kotabová E, Komenda J, Tichý M, Kaňa R. Pigment-protein complexes are organized into stable microdomains in cyanobacterial thylakoids. Biochim Biophys Acta Bioenerg 2019; 1860:148053. [PMID: 31344362 DOI: 10.1016/j.bbabio.2019.07.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 06/28/2019] [Accepted: 07/18/2019] [Indexed: 02/03/2023]
Abstract
Thylakoids are the place of the light-photosynthetic reactions. To gain maximal efficiency, these reactions are conditional to proper pigment-pigment and protein-protein interactions. In higher plants thylakoids, the interactions lead to a lateral asymmetry in localization of protein complexes (i.e. granal/stromal thylakoids) that have been defined as a domain-like structures characteristic by different biochemical composition and function (Albertsson P-Å. 2001,Trends Plant Science 6: 349-354). We explored this complex organization of thylakoid pigment-proteins at single cell level in the cyanobacterium Synechocystis sp. PCC 6803. Our 3D confocal images captured heterogeneous distribution of all main photosynthetic pigment-protein complexes (PPCs), Photosystem I (fluorescently tagged by YFP), Photosystem II and Phycobilisomes. The acquired images depicted cyanobacterial thylakoid membrane as a stable, mosaic-like structure formed by microdomains (MDs). These microcompartments are of sub-micrometer in sizes (~0.5-1.5 μm), typical by particular PPCs ratios and importantly without full segregation of observed complexes. The most prevailing MD is represented by MD with high Photosystem I content which allows also partial separation of Photosystems like in higher plants thylakoids. We assume that MDs stability (in minutes) provides optimal conditions for efficient excitation/electron transfer. The cyanobacterial MDs thus define thylakoid membrane organization as a system controlled by co-localization of three main PPCs leading to formation of thylakoid membrane mosaic. This organization might represent evolutional and functional precursor for the granal/stromal spatial heterogeneity in photosystems that is typical for higher plant thylakoids.
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Affiliation(s)
- A Strašková
- Institute of Microbiology, Czech Academy of Sciences, Centre Algatech, Novohradská 237, 379 81 Třeboň, Czech Republic
| | - G Steinbach
- Institute of Microbiology, Czech Academy of Sciences, Centre Algatech, Novohradská 237, 379 81 Třeboň, Czech Republic
| | - G Konert
- Institute of Microbiology, Czech Academy of Sciences, Centre Algatech, Novohradská 237, 379 81 Třeboň, Czech Republic
| | - E Kotabová
- Institute of Microbiology, Czech Academy of Sciences, Centre Algatech, Novohradská 237, 379 81 Třeboň, Czech Republic
| | - J Komenda
- Institute of Microbiology, Czech Academy of Sciences, Centre Algatech, Novohradská 237, 379 81 Třeboň, Czech Republic
| | - M Tichý
- Institute of Microbiology, Czech Academy of Sciences, Centre Algatech, Novohradská 237, 379 81 Třeboň, Czech Republic
| | - R Kaňa
- Institute of Microbiology, Czech Academy of Sciences, Centre Algatech, Novohradská 237, 379 81 Třeboň, Czech Republic.
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20
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Malnuit V, Smoleń S, Tichý M, Poštová Slavětínská L, Hocek M. Synthesis of Cyclic and Acyclic Nucleoside Phosphonates and Sulfonamides Derived from 6-(Thiophen-2-yl)-7-fluoro-7-deazapurine. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Vincent Malnuit
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Sabina Smoleń
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Lenka Poštová Slavětínská
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo nam. 2 16610 Prague 6 Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo nam. 2 16610 Prague 6 Czech Republic
- Department of Organic Chemistry; Faculty of Science; Charles University in Prague; Hlavova 8 12843 Prague 2 Czech Republic
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21
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Tichý M, Knopfová L, Jarkovský J, Vlček P, Katolická J, Čapov I, Hermanová M, Šmarda J, Beneš P. High c-Myb Expression Associates with Good Prognosis in Colorectal Carcinoma. J Cancer 2019; 10:1393-1397. [PMID: 31031849 PMCID: PMC6485226 DOI: 10.7150/jca.29530] [Citation(s) in RCA: 7] [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: 08/28/2018] [Accepted: 01/05/2019] [Indexed: 12/13/2022] Open
Abstract
Colorectal cancer (CRC) represents a serious challenge for oncologists due to high incidence and large heterogeneity. Prognostic factors are needed to stratify patients according to risk of disease progression. In this study, we report that high expression of c-Myb protein, determined by immunohistochemistry (IHC), associates with better overall and disease-free survival (OS, DFS) in a cohort of 103 patients. Although MYB has been previously considered to act as oncogene in CRC, our further analysis of datasets deposited in PrognoScan and SurvExpress databases confirmed that high MYB expression largely associates with good prognosis in CRC. As therapies targeting c-Myb have been developed and tested in preclinical studies, we believe that further studies are needed for detailed understanding of c-Myb function in CRC, before the c-Myb-targeted therapy enters clinical trials.
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Affiliation(s)
- Michal Tichý
- First Department of Pathological Anatomy, St. Anne's University Hospital and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Lucia Knopfová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital, Brno, Czech Republic
| | - Jiří Jarkovský
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Petr Vlček
- 1st Department of Surgery, St. Anne's University Hospital Brno, Czech Republic
| | - Jana Katolická
- Department of Oncology, St. Anne's University Hospital Brno, Czech Republic
| | - Ivan Čapov
- 1st Department of Surgery, St. Anne's University Hospital Brno, Czech Republic
| | - Markéta Hermanová
- First Department of Pathological Anatomy, St. Anne's University Hospital and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jan Šmarda
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Petr Beneš
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital, Brno, Czech Republic
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Tokarenko A, Lišková B, Smoleń S, Táborská N, Tichý M, Gurská S, Perlíková P, Frydrych I, Tloušt’ová E, Znojek P, Mertlíková-Kaiserová H, Poštová Slavětínská L, Pohl R, Klepetářová B, Khalid NUA, Wenren Y, Laposa RR, Džubák P, Hajdúch M, Hocek M. Correction to “Synthesis and Cytotoxic and Antiviral Profiling of Pyrrolo- and Furo-Fused 7-Deazapurine Ribonucleosides”. J Med Chem 2019; 62:1698. [PMID: 30681330 PMCID: PMC6378651 DOI: 10.1021/acs.jmedchem.9b00114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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23
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Tokarenko A, Lišková B, Smoleń S, Táborská N, Tichý M, Gurská S, Perlíková P, Frydrych I, Tloušt'ová E, Znojek P, Mertlíková-Kaiserová H, Poštová Slavětínská L, Pohl R, Klepetářová B, Khalid NUA, Wenren Y, Laposa RR, Džubák P, Hajdúch M, Hocek M. Synthesis and Cytotoxic and Antiviral Profiling of Pyrrolo- and Furo-Fused 7-Deazapurine Ribonucleosides. J Med Chem 2018; 61:9347-9359. [PMID: 30281308 DOI: 10.1021/acs.jmedchem.8b01258] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Three series of isomeric pyrrolo- and furo-fused 7-deazapurine ribonucleosides were synthesized and screened for cytostatic and antiviral activity. The synthesis was based on heterocyclizations of hetaryl-azidopyrimidines to form the tricyclic heterocyclic bases, followed by glycosylation and final derivatizations through cross-coupling reactions or nucleophilic substitutions. The pyrrolo[2',3':4,5]pyrrolo[2,3- d]pyrimidine and furo[2',3':4,5]pyrrolo[2,3- d]pyrimidine ribonucleosides were found to be potent cytostatics, whereas the isomeric pyrrolo[3',2',4,5]pyrrolo[2,3- d]pyrimidine nucleosides were inactive. The most active were the methyl, methoxy, and methylsulfanyl derivatives exerting submicromolar cytostatic effects and good selectivity toward cancer cells. We have shown that the nucleosides are activated by intracellular phosphorylation and the nucleotides get incorporated to both RNA and DNA, where they cause DNA damage. They represent a new type of promising candidates for preclinical development toward antitumor agents.
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Affiliation(s)
- Anna Tokarenko
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic.,Department of Organic Chemistry, Faculty of Science , Charles University in Prague , Hlavova 8 , CZ-12843 Prague 2 , Czech Republic
| | - Barbora Lišková
- Faculty of Medicine and Dentistry, Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Sabina Smoleń
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Natálie Táborská
- Faculty of Medicine and Dentistry, Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Soňa Gurská
- Faculty of Medicine and Dentistry, Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Pavla Perlíková
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Ivo Frydrych
- Faculty of Medicine and Dentistry, Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Eva Tloušt'ová
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Pawel Znojek
- Faculty of Medicine and Dentistry, Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Helena Mertlíková-Kaiserová
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Lenka Poštová Slavětínská
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Blanka Klepetářová
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Noor-Ul-Ain Khalid
- Department of Pharmacology and Toxicology , University of Toronto , 1 King's College Circle, Room 4213 , Toronto , Ontario M5S 1A8 , Canada
| | - Yiqian Wenren
- Department of Pharmacology and Toxicology , University of Toronto , 1 King's College Circle, Room 4213 , Toronto , Ontario M5S 1A8 , Canada
| | - Rebecca R Laposa
- Department of Pharmacology and Toxicology , University of Toronto , 1 King's College Circle, Room 4213 , Toronto , Ontario M5S 1A8 , Canada
| | - Petr Džubák
- Faculty of Medicine and Dentistry, Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic.,Cancer Research Czech Republic , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Marián Hajdúch
- Faculty of Medicine and Dentistry, Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic.,Cancer Research Czech Republic , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic.,Department of Organic Chemistry, Faculty of Science , Charles University in Prague , Hlavova 8 , CZ-12843 Prague 2 , Czech Republic
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Tichý M, Smoleń S, Deingruber T, Džubák P, Pohl R, Slavětínská LP, Hajdúch M, Hocek M. Thienopyrrolo[2, 3- d
]pyrimidines, New Tricyclic Nucleobase Analogues: Synthesis and Biological Activities. ChemistrySelect 2018. [DOI: 10.1002/slct.201802190] [Citation(s) in RCA: 2] [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: 11/06/2022]
Affiliation(s)
- Michal Tichý
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences, Flemingovo nam. 2; CZ-16610 Prague 6 Czech Republic
| | - Sabina Smoleń
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences, Flemingovo nam. 2; CZ-16610 Prague 6 Czech Republic
| | - Tomáš Deingruber
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences, Flemingovo nam. 2; CZ-16610 Prague 6 Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine; Faculty of Medicine and Dentistry; Palacky University and University Hospital in Olomouc, Hněvotínská 5; CZ-775 15 Olomouc Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences, Flemingovo nam. 2; CZ-16610 Prague 6 Czech Republic
| | - Lenka Poštová Slavětínská
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences, Flemingovo nam. 2; CZ-16610 Prague 6 Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine; Faculty of Medicine and Dentistry; Palacky University and University Hospital in Olomouc, Hněvotínská 5; CZ-775 15 Olomouc Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences, Flemingovo nam. 2; CZ-16610 Prague 6 Czech Republic
- Department of Organic Chemistry; Faculty of Science; Charles University in Prague, Hlavova 8; CZ-12843 Prague 2 Czech Republic
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Konč J, Tichý M, Pohl R, Hodek J, Džubák P, Hajdúch M, Hocek M. Sugar modified pyrimido[4,5- b]indole nucleosides: synthesis and antiviral activity. Medchemcomm 2017; 8:1856-1862. [PMID: 30108897 PMCID: PMC6084004 DOI: 10.1039/c7md00319f] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 08/24/2017] [Indexed: 12/12/2022]
Abstract
Three types of sugar modified pyrimido[4,5-b]indole nucleosides (2'-deoxy-2'-fluororibo-, 2'-deoxy-2'-fluoroarabino- and arabinonucleosides) were synthesized by glycosylation of 4,6-dichloropyrimido[4,5-b]indole followed by modification of sugar moiety and introduction of substituents into position 4 by cross-coupling reactions or nucleophilic substitutions. Some 2'-fluororibo- and 2'-fluoroarabinonucleosides displayed interesting anti-HCV activities (IC50 = 1.6-20 μM) and the latter compounds also some anti-dengue activities (IC50 = 10.8-40 μM).
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Affiliation(s)
- Juraj Konč
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic .
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic .
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic .
| | - Jan Hodek
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic .
| | - Petr Džubák
- Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Faculty of Medicine and Dentistry , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine , Palacky University and University Hospital in Olomouc , Faculty of Medicine and Dentistry , Hněvotínská 5 , CZ-775 15 Olomouc , Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry , Czech Academy of Sciences , Flemingovo nam. 2 , CZ-16610 Prague 6 , Czech Republic . .,Department of Organic Chemistry , Faculty of Science , Charles University in Prague , Hlavova 8 , CZ-12843 Prague 2 , Czech Republic
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26
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Kuhn B, Tichý M, Wang L, Robinson S, Martin RE, Kuglstatter A, Benz J, Giroud M, Schirmeister T, Abel R, Diederich F, Hert J. Prospective Evaluation of Free Energy Calculations for the Prioritization of Cathepsin L Inhibitors. J Med Chem 2017; 60:2485-2497. [PMID: 28287264 DOI: 10.1021/acs.jmedchem.6b01881] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Improving the binding affinity of a chemical series by systematically probing one of its exit vectors is a medicinal chemistry activity that can benefit from molecular modeling input. Herein, we compare the effectiveness of four approaches in prioritizing building blocks with better potency: selection by a medicinal chemist, manual modeling, docking followed by manual filtering, and free energy calculations (FEP). Our study focused on identifying novel substituents for the apolar S2 pocket of cathepsin L and was conducted entirely in a prospective manner with synthesis and activity determination of 36 novel compounds. We found that FEP selected compounds with improved affinity for 8 out of 10 picks compared to 1 out of 10 for the other approaches. From this result and other additional analyses, we conclude that FEP can be a useful approach to guide this type of medicinal chemistry optimization once it has been validated for the system under consideration.
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Affiliation(s)
- Bernd Kuhn
- Roche Pharmaceutical Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - Michal Tichý
- Laboratorium für Organische Chemie, ETH Zurich , Vladimir-Prelog-Weg 3, 8093 Zurich, Switzerland
| | - Lingle Wang
- Schrödinger, Inc. , 120 West 45th Street, New York, New York 10036, United States
| | - Shaughnessy Robinson
- Schrödinger, Inc. , 120 West 45th Street, New York, New York 10036, United States
| | - Rainer E Martin
- Roche Pharmaceutical Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - Andreas Kuglstatter
- Roche Pharmaceutical Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - Jörg Benz
- Roche Pharmaceutical Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - Maude Giroud
- Laboratorium für Organische Chemie, ETH Zurich , Vladimir-Prelog-Weg 3, 8093 Zurich, Switzerland
| | - Tanja Schirmeister
- Institut für Pharmazie und Biochemie, Johannes Gutenberg-Universität Mainz , Staudinger Weg 5, 55128 Mainz, Germany
| | - Robert Abel
- Schrödinger, Inc. , 120 West 45th Street, New York, New York 10036, United States
| | - François Diederich
- Laboratorium für Organische Chemie, ETH Zurich , Vladimir-Prelog-Weg 3, 8093 Zurich, Switzerland
| | - Jérôme Hert
- Roche Pharmaceutical Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse 124, 4070 Basel, Switzerland
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Tichý M, Smoleń S, Tloušt'ová E, Pohl R, Oždian T, Hejtmánková K, Lišková B, Gurská S, Džubák P, Hajdúch M, Hocek M. Synthesis and Cytostatic and Antiviral Profiling of Thieno-Fused 7-Deazapurine Ribonucleosides. J Med Chem 2017; 60:2411-2424. [PMID: 28221790 DOI: 10.1021/acs.jmedchem.6b01766] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Two isomeric series of new thieno-fused 7-deazapurine ribonucleosides (derived from 4-substituted thieno[2',3':4,5]pyrrolo[2,3-d]pyrimidines and thieno[3',2':4,5]pyrrolo[2,3-d]pyrimidines) were synthesized by a sequence involving Negishi coupling of 4,6-dichloropyrimidine with iodothiophenes, nucleophilic azidation, and cyclization of tetrazolopyrimidines, followed by glycosylation and cross-couplings or nucleophilic substitutions at position 4. Most nucleosides (from both isomeric series) exerted low micromolar or submicromolar in vitro cytostatic activities against a broad panel of cancer and leukemia cell lines and some antiviral activity against HCV. The most active were the 6-methoxy, 6-methylsulfanyl, and 6-methyl derivatives, which were highly active to cancer cells and less toxic or nontoxic to fibroblasts.
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Affiliation(s)
- Michal Tichý
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Gilead Sciences & IOCB Research Center , Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Sabina Smoleń
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Gilead Sciences & IOCB Research Center , Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Eva Tloušt'ová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Gilead Sciences & IOCB Research Center , Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Gilead Sciences & IOCB Research Center , Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Tomáš Oždian
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry , Hněvotínská 5, CZ-775 15 Olomouc, Czech Republic
| | - Klára Hejtmánková
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry , Hněvotínská 5, CZ-775 15 Olomouc, Czech Republic
| | - Barbora Lišková
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry , Hněvotínská 5, CZ-775 15 Olomouc, Czech Republic
| | - Soňa Gurská
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry , Hněvotínská 5, CZ-775 15 Olomouc, Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry , Hněvotínská 5, CZ-775 15 Olomouc, Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine, Palacky University and University Hospital in Olomouc, Faculty of Medicine and Dentistry , Hněvotínská 5, CZ-775 15 Olomouc, Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Gilead Sciences & IOCB Research Center , Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic.,Department of Organic Chemistry, Faculty of Science, Charles University in Prague , Hlavova 8, CZ-12843 Prague 2, Czech Republic
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Godava J, Krejčí J, Hude P, Ozábalová E, Honek T, Němec P, Tichý M, Pažourková M, Špinarová L. Invasive aspergillosis following the heart transplantation - A case report. Cor Vasa 2016. [DOI: 10.1016/j.crvasa.2015.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bosáková A, Perlíková P, Tichý M, Pohl R, Hocek M. 6-Aryl-4-amino-pyrimido[4,5-b]indole 2'-deoxyribonucleoside triphosphates (benzo-fused 7-deaza-dATP analogues): Synthesis, fluorescent properties, enzymatic incorporation into DNA and DNA-protein binding study. Bioorg Med Chem 2016; 24:4528-4535. [PMID: 27498304 DOI: 10.1016/j.bmc.2016.07.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/22/2016] [Accepted: 07/25/2016] [Indexed: 01/03/2023]
Abstract
Four 6-substituted 4-amino-pyrimido[4,5-b]indole 2'-deoxyribonucleoside triphosphates (dA(BX)TPs) were prepared by glycosylation of 4,6-dichloropyrimidoindole followed by ammonolysis, cross-coupling and triphosphorylation. They were found to be moderate to good substrates for DNA polymerases in primer extension. They also exerted fluorescence with emission maxima 335-378nm. When incorporated to oligonucleotide probes, they did not show significant mismatch discrimination but the 6-benzofuryl 4-amino-pyrimido[4,5-b]indole nucleotide displayed a useful sensitivity to protein binding in experiment with SSB protein.
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Affiliation(s)
- Andrea Bosáková
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Pavla Perlíková
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Michal Tichý
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic; Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-12843 Prague 2, Czech Republic.
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Hoch J, Ferko A, Bláha M, Ryška A, Čapov I, Dušek L, Feit J, Grega M, Hermanová M, Hovorková E, Chmelová R, Kala Z, Klos D, Kodet R, Langer D, Hadži-Nikolov D, Örhalmi J, Páral J, Tichý M, Tučková I, Vjaclovský M, Vlček P. [Parametric monitoring of the quality of total mesorectal excision and surgical treatment of rectal carcinoma results of a multicenter study]. Rozhl Chir 2016; 95:262-271. [PMID: 27523174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
INTRODUCTION Tumour size and the quality of its complete surgical removal are the main prognostic factors in rectal cancer treatment. The number of postoperative local recurrences depends on whether the mesorectum has been completely removed - total mesorectal excision (TME) - and whether tumour-free resection margins have been achieved. The surgery itself and its quality depend on the accuracy of preoperative diagnosis and detection of risk areas in the rectum and mesorectum, on the surgeons skills, and finally on pathological assessment evaluating whether complete tumour excision has been accomplished including circumferential margins of the tumour, and whether mesorectal excision is complete. The aim of our study was to implement and standardize a new method of evaluation of the quality of the surgical procedure - TME - in rectal cancer treatment using an assessment of its circumferential margins (CRO) and completeness of the excision. METHODS The study consisted of two parts. The first, multi-centre retrospective phase with 288 patients analysed individual partial parameters of the diagnosis, operations and histological examinations of the rectal cancer. Critical points were identified and a unified follow-up protocol was prepared. In the second, prospective part of this study 600 patients were monitored parametrically focusing on the quality of the TME and its effect on the oncological treatment results. RESULTS The proportion of patients with restaging following neoadjuvant therapy increased from 60.0% to 81.7% based on preoperative diagnosis. The number of specimens missing an assessment of the mesorectal excision quality decreased from 52.9% in the retrospective part of to the study to 22.8% in the prospective part. The proportion of actually complete TMEs rose from 22.6% to 26.0%, and that of nearly complete TMEs from 10.1% to 24.0%. CONCLUSION The introduction of parametric monitoring into routine clinical practice improved the quality of pre-treatment and preoperative diagnosis, examination of the tissue specimen, and consequently improved quality of the surgical procedure was achieved. KEY WORDS rectal cancer TME - parametric monitoring - quality control.
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Pleško M, Husáková K, Kaiserová E, Tichý M, Zámečník J. [Embryonal Tumors with Multilayer Rosettes--Rare Central Nervous System Tumors in Infants]. Klin Onkol 2015; 28:288-92. [PMID: 26299744 DOI: 10.14735/amko2015288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
INTRODUCTION The most recent findings show a histopathological, genetic and clinical uniformity in cases of tumors called embryonal tumors with multilayer rosettes. This group is composed of medulloepithelioma, ependymoblastoma and embryonal tumor with abundant neuropil and true rosettes. Amplification of locus 19q13.42, which includes C19MC cluster containing genes for microRNA, and also LIN28A positivity are present in all three entities. Dysregulation of epigenetic modifiers is very important in pathogenesis of the disease. These tumors manifest in little children (median less than 3 years of age); overall survival is 5-10%. CASE REPORT Almost three year-old boy diagnosed with brainstem tumor: meduloepithelioma, WHO grade IV confirmed by histological investigation. He presented with dysarthria, bulbar syndrome, central lesion of the facial nerve, quadriparesis with right-side dominancy. He received three induction cycles of chemotherapy from March to May 2014 (according to protocol COG ACNS0334). Only partial improvement of his clinical state was reached. Signs of an intracranial hypertension appeared resulting in VP shunt insertion; impairment of consciousness developed after the induction cycles and before any other treatment could be initiated. He underwent radiotherapy due to vital indication. After application of two fractions (boost in the center of the tumor), the patient became quickly comatose. Spinal cord metastasis was demarked by MRI scan (in the level of 3rd cervical vertebra). A bilateral infiltration in pulmonary parenchyma, according to a radiologist metastasis-wise, was detected by CT scan (histologisation of infiltration was not implemented). The patient died in August 2014--six months after manifestation of first symptoms. CONCLUSION We reported our first documented case of a patient with tumor from embryonal tumors with multilayer rosettes group in Slovakia. Nowadays, there is no effective treatment of these tumors. Research of molecules targeting to epigenetic modifiers would be one of the possible promises for future therapy.
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Žamboch K, Krejčí K, Škarda J, Tichý M, Überall I, Skýpalová P, Langová K, Stejskal D, Švesták M, Zahálková J, Ščudla V, Zadražil J. Histomorphometric diagnostics of renal osteopathy in chronic dialysis patients at high risk of cardiovascular disease. Int Urol Nephrol 2015; 47:1195-201. [PMID: 25931273 DOI: 10.1007/s11255-015-0989-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 04/14/2015] [Indexed: 01/19/2023]
Abstract
UNLABELLED Chronic kidney disease-mineral and bone disorder (CKD-MBD) ranks among clinically and pathogenetically significant complications in patients with CKD. Numerous factors are involved in its development, and histomorphometric analysis of the bone tissue is still necessary for accurate diagnosis. METHODS The open, pilot, prospective study aimed at performing a comprehensive histomorphometric bone analysis in 26 dialysis patients and assessing the relationships of different types of CKD-MBD to selected parameters of calcium and phosphate metabolism, densitometry, activity of parathyroid glands, presence of diabetes mellitus, and duration of dialysis treatment. RESULTS Comparison of the histomorphometric characteristics demonstrated statistically significant correlations between the volume of bone trabeculae and s-procollagen 1 (.754) as well as s-calcitonin (.856). Similarly, there was a positive correlation between the size of tetracycline lines and volume of bone trabeculae (.705) and a strong negative correlation with the thickness of trabeculae (-.442). When assessing the serum levels of s-osteoprotegerin and serum RANKL, there was a correlation with osteoid thickness and bone trabeculae thickness. In case of s-osteoprotegerin, a statistical power was demonstrated in relation to osteoid thickness (.880); in case of s-RANKL, a statistical power was demonstrated in relation to the thickness of trabeculae (.830). When assessing the influence of dialysis duration, relationships to the volume of trabecular bone (.665) and volume of bone trabeculae (.949) were demonstrated. Finally, a relationship between s-1,25-hydroxyvitamin D and s-osteoprotegerin was observed (.739); also the relationships demonstrated were significantly lower volume of bone trabeculae in men (p = 0.067) and lower values of s-osteocalcin and s-procollagen 1 in diabetic patients (p = 0.014). CONCLUSION The results provide new noninvasive possibilities of CKD-MBD detection that are based on selected serum parameters of bone metabolism. Presented are possibilities of noninvasive assessment of different types of CKD-MBD using serum osteomarkers in relation to comprehensive CKD-MBD histomorphometry.
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Affiliation(s)
- K Žamboch
- Department of Internal Medicine III - Nephrology, Rheumatology and Endocrinology, University Hospital Olomouc, I. P. Pavlova 6, 775 20, Olomouc, Czech Republic,
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Cagaš J, Čapov I, Vlček P, Korbička J, Veverková L, Hermanová M, Tichý M. [Intraoperative sentinel lymph node detection in colon cancer resection - preliminary results]. Rozhl Chir 2015; 94:156-159. [PMID: 25866101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
INTRODUCTION The aim of this paper is to evaluate the results of intraoperative sentinel node detection in colon cancer patients and to compare the number of nodes retrieved per specimen in comparison with standard resection. METHODS Patients undergoing elective colon cancer resection were included in the study. The specimen and the sentinel lymph node were sent for histopathological examination. A group of patients from 2011 who underwent elective resection served as the study control. RESULTS The control group comprised 56 patients. The average node count was 12.73 (4-27). The study group included 102 patients; 29 patients had to be excluded because of protocol deviation. Out of the remaining 73 (46 male and 27 female) patients, 24 were N-positive and 2 of them were pN1c. In the remaining 22 patients, the sentinel node was positive in 8 cases, corresponding to a sensitivity of 36.36%. The average lymph node count was 15.97(3-30) after patent blue dye injection. CONCLUSION Intraoperative sentinel lymph node detection is an easy and feasible method. Despite the low sensitivity, the main positive effect of the method is the increased lymph node count per resection specimen.
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Svěcený J, Syková E, Tichý M, Laštůvka J. [New options for therapeutic revascularization in lower extremity limb ischemia linked to the diabetic foot syndrome by autologous stem cell transplantation]. Cas Lek Cesk 2015; 154:161-167. [PMID: 26357857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Type 2 diabetes incidence is growing worldwide. It is in up to 50% cases linked with diabetic foot syndrome. This is associated with peripheral neuropathy and peripheral artery disease which increases risk of defects with impaired healing. Resulting high number of amputations has major influence on the quality of life and constitutes serious clinical issue. In recent years numerous clinical studies have shown positive effect of new treatment modality using regenerative potential of the autologous stem cells transplantation. This review tries to summarize existing results of therapeutic revascularization using stem cell and to outline mechanism of their action.
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Hermanová M, Matěj R, Dušková J, Honsová E, Tichý M. [Evaluation of safe resection margins in tumours of parenchymatous organs]. Rozhl Chir 2014; 93:100-106. [PMID: 24702294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The definition of a safe surgical margin in tumours of parenchymatous organs has been the subject of frequent debates and a number of studies. This topic is not generally unified for parenchymatous organs and has many organ specifics. Moreover, there are still controversies in the diagnostic criteria and the definitions of positive resection margins, in indications of perioperative examinations of resection margins, and in the prognostic significance of margin involvement in different parenchymatous organs. The consensus in terminology and standardization of histopathological examination procedures is also very desirable across the diagnostic areas.
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Doležel M, Vaňásek J, Odrážka K, Kroulík T, Kudelka K, Tichý M, Košťál M, Vocásek Z. [3D MRI-based brachytherapy in patients with locally advanced cervical carcinoma - early clinical results]. Ceska Gynekol 2012; 77:507-513. [PMID: 23521192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To demonstrate the clinical benefit of MRI-based brachytherapy using CT and MRI data fusion. DESIGN Clinical trial. SETTING Oncology Centre, Multiscan and Pardubice Regional Hospital, Pardubice. METHODS Thirty six patients with locally advanced cervical cancer were treated with MRI-based brachytherapy (MRI-based preplanning 15 patients, MRI approximation 21 patients). All patients were continuously followed during and after treatment. Tumor control and toxicity were evaluated at each visit. Late gastrointestinal and genitourinary symptoms were recorded, using Fox Chase (FC) modification of the Radiation Therapy Oncology Group (RTOG) and Late Effects Normal Tissue Task Force (LENT) toxicity criteria. RESULTS We observed no complications during the entire MRI procedure at the radiology department. The cumulative incidence of grade 2 late genitourinary and gastrointestinal toxicity at median follow up of 30.3 months was 4.8% and 9.5% for MRI approximation, respectively 0% and 13.3% for MRI-based preplanning. Local control was 86.7% for MRI-based preplanning and 76.2% for MRI approximation. CONCLUSION 3D MRI-based brachytherapy with consecutive CT/MRI data fusion yields excellent local control with minor toxicity.
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Affiliation(s)
- M Doležel
- Pardubicka krajska nemocnice, Pardubice.
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Tichý M, Pohl R, Xu HY, Chen YL, Yokokawa F, Shi PY, Hocek M. Synthesis and antiviral activity of 4,6-disubstituted pyrimido[4,5-b]indole ribonucleosides. Bioorg Med Chem 2012; 20:6123-33. [PMID: 22985963 DOI: 10.1016/j.bmc.2012.08.021] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 08/14/2012] [Accepted: 08/16/2012] [Indexed: 10/28/2022]
Abstract
A series of new pyrimido[4,5-b]indole ribonucleosides bearing phenyl or hetaryl group at position 4 has been prepared by selective Pd-catalyzed cross-coupling reactions of the corresponding protected 4,6-dichloropyrimido[4,5-b]indole ribonucleoside with (het)arylboronic acids or stannanes followed by deprotection. Further cross-couplings under harsher conditions and employing X-Phos ligand proceeded at the position 6 leading to 4,6-disubstituted pyrimido[4,5-b]indole ribonucleosides. Some of these compounds displayed antiviral activity against Dengue virus.
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Affiliation(s)
- Michal Tichý
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Flemingovo nam. 2, CZ-16610 Prague 6, Czech Republic
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Krasulová J, Hanus R, Kutalová K, Šobotník J, Sillam-Dussès D, Tichý M, Valterová I. Chemistry and anatomy of the frontal gland in soldiers of the sand termite Psammotermes hybostoma. J Chem Ecol 2012; 38:557-65. [PMID: 22549556 DOI: 10.1007/s10886-012-0123-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 03/05/2012] [Accepted: 04/17/2012] [Indexed: 11/26/2022]
Abstract
A great diversity of defensive chemicals has been described in termite soldiers equipped with a unique defensive organ, the frontal gland. Along with the functional diversity of these compounds, reflecting the evolutionary history of particular lineages and their defensive strategies, a considerable degree of chemical variability often occurs among species and populations. Thus, the chemistry of termite defense may provide information on the phylogeny and geographic dispersal of species and populations. In this paper, we report on the anatomy of the frontal gland and on the diversity of soldier defensive chemicals in the sand termite, Psammotermes hybostoma, from nine colonies and five different localities in Egypt. Using gas chromatography-mass spectrometry, a total of 30 sesquiterpene hydrocarbons, or their oxygenated derivatives, were detected, and the chemical identity of most of them identified. In addition, a ketone, an ester, and a diterpene were identified in some colonies. Within colonies, the chemical composition was stable and did not differ among soldier size categories. However, there were pronounced quantitative and qualitative differences in frontal gland chemicals among colonies and geographic locations. The findings are discussed in a broader comparison with other termite taxa.
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Affiliation(s)
- Jana Krasulová
- Institute of Organic Chemistry and Biochemistry, Flemingovo n. 2, 166 10, Prague, Czech Republic
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40
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Adam Z, Elleder M, Moulis M, Tichý M, Cervinková I, Rehák Z, Koukalová R, Fojtík Z, Hanke I, Pour L, Krejčí M, Zahradová L, Szturz P, Hájek R, Král Z, Mayer J. [The role of PET-CT in decision making on the treatment of localized nodular form of pulmonary AL-amyloidosis]. Vnitr Lek 2012; 58:241-252. [PMID: 22486293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Depending on the extent of organism affected, there is a systemic (amyloid is deposited in the interstitial space of multiple tissues and organs) and localized (amyloid is deposited in one or a few solitary lesions) form of amyloidosis. Localized forms of amyloidosis have a significantly better prognosis than the systemic ones. The respiratory tract might be affected by diffuse interstitial involvement, associated with systemic AL-amyloidosis, as well as localised involvement of respiratory tract (localised laryngotracheobronchial amyloidosis) or pulmonary parenchyma called nodular form of localized pulmonary amyloidosis. Tracheobronchial form may affect larynx and bronchial tree, and forms plaques or nodules in the epithelium of the respiratory tract. Nodular form causes spherical or irregular lesions in the pulmonary parenchyma, indistinguishable from pulmonary parenchyma metastases. We describe a two-year follow up of a patient with nodular form of pulmonary amyloidosis. The patient had multiple lesions in both lungs, clearly visible on HRCT (High Resolution Computer Tomography) that intensively accumulated fluorodeoxyglucose (FDG) during the first PET-CT. At the time of diagnosis, the largest lesion SUV for FDG accumulation was 8.2. Histochemical analysis showed that amyloid consisted of the light λ chains, i.e. AL-amyloid. Investigations to detect a systemic form of amyloidosis, if present, were negative. The patient had no monoclonal immunoglobulin either in the urine or serum (negative immunofixation) and had normal levels of free light chains in the serum. Her symptoms were previously suggestive of the Sjögrens syndrome. However, the rheumatologist consulted at the time of diagnosis of the nodular form of pulmonary amyloidosis did not find any signs of an active systemic connective tissue disorder. CRP was repeatedly normal. When systemic AL-amyloidosis was excluded, we decided to only monitor lesion development with no treatment intervention. The patient had 3 PET-CTs. CT showed that no lesions enlarged, some lesions decreased in size slightly. It should be emphasized that follow-up PET-CTs did not show increased FDG accumulation. We assume that the increased FDG accumulation in pulmonary lesions seen during the first PET-CT was due to the activity of the cells that formed this amyloid and that this activity spontaneously ceased, leading to normalization of FDG accumulation in pulmonary nodules. PET-CT is useful for monitoring of the development of pulmonary nodular amyloidosis. Normalization of originally increased FDG accumulation in amyloid lesions suggests cessation of the process of amyloid formation and is a positive prognostic sign.
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Affiliation(s)
- Z Adam
- Interní Hematoonkologická Klinika Lékarské Fakulty MU a Brno, Pracovisté Bohunice, Prednosta prof. MUDr. Jirí Mayer, CSc.
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41
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Tichý M, Tichá V, Scudla V, Sváchová M, Zapletalová J. [Analysis of bone marrow angiogenesis in multiple myeloma]. Cesk Patol 2010; 46:15-19. [PMID: 21280277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The authors studied angiogenesis in trephine biopsy samples taken from the hip bone from a total of 51 patients with an as yet untreated plasma cell myeloma / multiple myeloma (MM). Microvessel density calculated to 1 mm2 was represented by monoclonal antibodies against CD34 and nestin. It was discovered that proliferating vessels labeled with anti-nestin antibody nearly never occur in the interstitial type of infiltration. The amount of proliferating vessels in nodular infiltrates is significantly lower compared to the capillary network labeled with antibodies against CD34. The density of proliferating vessels in nodular infiltrates significantly correlates with the proliferation index Ki67 of myeloma cells, not, however, with the degree of MM differentiation.
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Affiliation(s)
- M Tichý
- Ustav patologie LF UP a FNOI, Olomouc.
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42
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Bláha M, Vajnerová O, Bednár M, Vajner L, Tichý M. [Traumatic brain injuries--effects of alcohol and caffeine on intracranial pressure and cerebral blood flow]. Rozhl Chir 2009; 88:682-686. [PMID: 20662451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
INTRODUCTION Alcohol and caffeine is intermittently or regularly used by majority of people. These drugs may have acute or chronic effects on patients with traumatic brain injury. Alcohol intoxication increases cerebral blood flow from 8 to 24%. Caffeine decreases cerebral blood flow from 10 to 20%. These facts create a theoretical hypothesis that the decrease of CBF may reduce incranial pressure. The aim of this study was to investigate the effect of caffeine on intracranial pressure in rats following traumatic brain injury. METHODS Ten Wistar male rats underwent weight drop closed head injury. The second stage of the experiment was done 12 to 18 hours later. Intracranial pressure, respiration, heart rate and the mean arterial pressure was monitored. Intraperitoneal injection of caffeine (20 mg/kg) was administered and repetitive measurement of vital signs and intracranial pressure was done. RESULTS The baseline ICP after head injury was 8.5 +/- 2.9 mm Hg. Ten minutes after intraperitoneal caffeine administration ICP dropped to 7.6 +/- 3.1 mm Hg (p < 0.05). This represents a 11% decrease from baseline value. Mean arterial pressure, respiration and heart rate were stable. CONCLUSION Intracranial pressure decrease of 11% from baseline value. This drop was compatible with our hypothesis. The exact dosage of caffeine, its form and rate, should be more precisely specified in further studies.
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Affiliation(s)
- M Bláha
- Neurochirurgické oddĕlení FN Motol, Ustav fyziologie 2. LF UK Praha.
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43
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Pudil R, Tichý M. [Natriuretic peptides, renal impairment and onset of cardiovascular complications]. Vnitr Lek 2009; 55:913-914. [PMID: 19947232] [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: 05/28/2023]
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Kost'ál M, Sákra L, Tichý M, Flasar J. [Natural orifice surgery. Hybrid transvaginal cholecystectomy]. Ceska Gynekol 2009; 74:302-305. [PMID: 20564987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To review a current state of the natural orifice surgery. SUBJECT Review article and case report. SETTING Porodnicko-gynekologická klinika Pardubické krajské nemocnice, a.s. METHOD The analysis of published data and case report. CONCLUSION Natural orifice surgery makes it possible to perform intraperitoneal surgical procedures with a minimal number of access points in the abdominal wall entryways, so these procedures are hybrids. The aim is to reduce transabdominal assistance to be minimal or none at all.
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Affiliation(s)
- M Kost'ál
- Porodnicko-gynekologická klinika PKN, a.s., Pardubice
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Hořínek D, Hoza D, Tomek A, Hort J, Häckel M, Tichý M. Lumbar pressure and transcranial Doppler sonography in children with scaphocephaly. Br J Neurosurg 2009; 22:219-23. [DOI: 10.1080/02688690701882014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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46
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Adam Z, Krejcí M, Tichý M, Stepánková S, Pour L, Hájek R. [The treatment of renal failure in multiple myeloma]. Vnitr Lek 2009; 55:570-582. [PMID: 19662889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
While in some patients, renal failure is the only, isolated sign of multiple myeloma, other patients have further simultaneous symptoms (signs of bone destruction, hypercalcaemia, cytopenia). Therefore, differential diagnosis of renal failure should always include monoclonal gametopathy-associated nephropathy. Renal damage is caused dominantly by free light chains. Elevated early mortality reaches 30% during the first 3 months and complicates treatment of patients with multiple myeloma with renal failure. More serious the renal damage caused by monoclonal immunoglobulin is, less likely is the improvement of renal function following treatment. Early diagnosis at the time when renal impairment is still reversible is extremely important for the patient's prognosis. Treatment regimens with high-dose glucocorticoids form the basis of treatment. Combined treatments with new, highly effective drugs (bortezomib or thalidomide) with high-dose glucocorticoids and an alkylating cytostatic agent, or with doxorubicin, have the fastest onset of action and thus provide the highest likelihood that haematological treatment response will be followed by improved renal function. High-dose chemotherapy is recommended in patients with persisting renal failure, particularly in the subgroup of patients with chemotherapy-sensitive disease; melphalan dose should not exceed 140 mg/m2.
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Affiliation(s)
- Z Adam
- Interní hematoonkologická klinika Lékarské fakulty MU a FN Brno.
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Vasatová M, Tichý M, Horácek JM, Pudil R, Horáková L, Palicka V. [Multi-marker approach in the diagnostics of cardiac diseases by protein biochip technology]. Cas Lek Cesk 2009; 148:591-596. [PMID: 20662394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
BACKGROUND Multi-marker approach is recommended for rapid diagnostics and risk stratification of acute coronary syndrome. We tested the analytical performance of protein biochip technology for determination cardiac markers. METHODS Analysis of cardiac markers: CK-MB mass, cTnl, myoglobin, glycogen phosphorylase BB (GPBB), heart type of fatty acid binding protein (h-FABP) and carbonic anhydrase III (CAIII) was performed by system Evidence Investigator (Randox). Analytical parameters of Cardiac array were tested. The Evidence Investigator results were compared with Elecsys 2010 (Roche) CK-MB mass and myoglobin methods. Markers of myocardial injury were determined in 28 blood donors, 28 patients with acute myocardial infarction diagnosis and 21 patients after chemotherapy containing anthracyclines (monitoring of cardiotoxicity). RESULTS The Passing-Bablok regression shows statistically significant differences in results. The reasons for these differences are poor standardization of methods and discrepancies between calibrations. New substances h-FABP and GPBB are promising early markers of acute myocardial infarction and diagnostic sensitivity of h-FABP would be better than myoglobin test. These markers can be useful for monitoring of cardiotoxicity of anthracyclines. CONCLUSIONS In future, the use of biochip technology in cardiology diagnostic represents an important challenge but it is a necessary standardization of immunochemical methods.
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Affiliation(s)
- M Vasatová
- Univerzita Karlova v Praze, LF a FN Hradec Králové, Ustav klinické biochemie a diagnostiky.
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Horínek D, Hoza D, Cerný R, Vyhnálek M, Sturm D, Bojar M, Libý P, Oweimrin M, Tichý M. Two cases of improvement of smooth pursuit eye movements after selective posterior rhizotomy. Childs Nerv Syst 2008; 24:1283-8. [PMID: 18688617 DOI: 10.1007/s00381-008-0673-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Selective posterior rhizotomy (SPR) represents a standard neurosurgical approach in the treatment of spasticity in children with cerebral palsy (CP). Beside the reduction of spasticity in lower limbs, SPR may have suprasegmental effects, considerably above the surgery site. In this communication, we report on the improvement of smooth pursuit eye movements (SPEM) in two children after SPR. MATERIAL AND METHODS Four children with CP underwent SPR. Eye movements were registered by infrared video-oculography before and after the surgery. RESULTS The analysis of SPEM showed the improvement of the correlation coefficient of the eye response to the stimulus after SPR in two subjects. Improvement of SPEM performance was largely due to suppression of spontaneous fixation nystagmus. CONCLUSION SPR may lead to the improvement of SPEM in children with CP. The influence of SPEM improvement on quality of life in a group of severely disabled nonambulant children with CP remains to be assessed.
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Affiliation(s)
- D Horínek
- Department of Neurosurgery, Central Military Hospital, First Faculty of Medicine, Charles University, U Vojenské nemocnice 1200, 160 00, Prague 6, Czech Republic.
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Pudil R, Tichý M, Ulrychová M, Horáková L, Vojácek J. [Biomarkers of myocardial ischemia and necrosis in 2008]. Vnitr Lek 2008; 54:965-970. [PMID: 19009763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In the review article, the authors present current knowledge of biomarkers of myocardial ischemia and necrosis. They comment new definition of myocardial infarction resulted as consensus of European Society of Cardiology and American Heart Association. They added clinically interested data about routinely used cardiomarkers (cardiac troponins and creatinkinase). At the second part, the authors focused on new biomarkers (fatty acids binding proteins, ischemia-modified albumin, glycogen phosphorylase isoenzyme BB) and its significance in diagnosis of myocardial ischemia/necrosis and their prognostic significance. Some of new promising molecules are discussed in the last part of the article.
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Affiliation(s)
- R Pudil
- I. interní klinika Lékarské fakulty UK a FN Hradec Králové.
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50
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Dolezel M, Vanásek J, Odrázka K, Tichý M. [The progress in the treatment of cervical cancer--3D brachytherapy CT/MR-based planning]. Ceska Gynekol 2008; 73:144-149. [PMID: 18646665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Brachytherapy plays a major role in the therapeutic management of patiens with cervix cancer. The rapid dose fall-off provide a very high dose to the tumor, while relative sparing bladder, rektum, sigmoid and small bowel. The CT/MR-based planning provides better information on target and organ volumes and dose-volumes histograms in contrast to radiography-based planning, that provides doses only at selected points.
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Affiliation(s)
- M Dolezel
- KOC Pardubická krajská nemocnice a.s., Multiscan s.r.o., Pardubice
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