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Małecki P, Mania A, Tracz J, Łuczak M, Mazur-Melewska K, Figlerowicz M. Adipocytokines as Risk Factors for Development of Nonalcoholic Fatty Liver Disease in Children. J Clin Exp Hepatol 2021; 11:646-653. [PMID: 34866842 PMCID: PMC8617538 DOI: 10.1016/j.jceh.2021.03.002] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 03/03/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Noninvasive diagnostics of nonalcoholic fatty liver disease (NAFLD), the most common cause of liver dysfunction in children, are based on imaging, biochemical tests and their compilation. The study aimed to evaluate the serological biomarkers of steatosis, inflammation and liver fibrosis to assess the risk of NAFLD in children. METHODS A total of 73 children were included in the prospective study; 50 of them were diagnosed with NAFLD based on ultrasound, and 23 formed a control group. Basic anthropometric parameters were measured, blood samples were taken for laboratory tests and evaluated proteins were assessed by enzyme-linked immunosorbent assay-adiponectin, tumour necrosis factor alpha, fibroblast growth factor 21, liver fatty acid-binding protein (L-FABP) and interleukin 6. RESULTS Statistically significant differences between the levels of two proteins were found: the adiponectin level was lower in the NAFLD group (12.24 ± 7.01 vs 16.88 ± 9.21 μg/mL, P = 0.024), and L-FABP levels were higher (21.48 ± 20.61 vs 11.74 ± 8.39 ng/mL, P = 0.031). In the group of children with body mass index (BMI)-for-age >1 standard deviation (SD), adiponectin concentration was also significantly lower (12.18 ± 6.43 μg/mL) than in the group with BMI ≤1 SD (17.29 ± 9.42 μg/mL, P = 0.015). The odds ratios and 95% confidence interval for the relation between adiponectin and NAFLD and obesity were 0.868 (0.767-0.982) and 0.838 (0.719-0.977), respectively. CONCLUSION Adiponectin may be useful in evaluating the risk of NAFLD and obesity in children.
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Key Words
- ALF, acute liver failure
- ALT, alanine aminotransferase
- AMPK, adenosine monophosphate–activated protein kinase
- APRI, AST to Platelet Ratio Index
- AST, aspartate aminotransferase
- BMI, body mass index
- ER, endoplasmic reticulum
- FFA, free fatty acid
- FGF-21, fibroblast growth factor 21
- HMW, high-molecular-weight
- IR, insulin resistance
- L-FABP, liver fatty acid-binding protein
- LPS, lipopolysaccharide
- NAFLD, nonalcoholic fatty liver disease
- NASH, nonalcoholic steatohepatitis
- OR, odds ratio
- PNFS, Paediatric NAFLD Fibrosis Scale
- PPAR-α, peroxisome proliferator–activated receptor-α
- SD, standard deviation
- SOCS3, suppressor of cytokine signalling 3
- TNF-α, tumour necrosis factor α
- US-FLI, ultrasound fatty liver indicator
- WHO, World Health Organization
- adipokines
- children
- nonalcoholic fatty liver disease
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Affiliation(s)
- Paweł Małecki
- Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences, Poznan, Poland
| | - Anna Mania
- Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences, Poznan, Poland
| | - Joanna Tracz
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
| | - Magdalena Łuczak
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
| | - Katarzyna Mazur-Melewska
- Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences, Poznan, Poland
| | - Magdalena Figlerowicz
- Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences, Poznan, Poland
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Łuczak M, Krajewski W, Nowak Ł, Chorbińska J, Galik K, Kiełb P, Tukiendorf A, Kościelska-Kasprzak K, Małkiewicz B, Zdrojowy R. Influence of the virtual reality devices on pain and anxiety in patients undergoing cystoscopy performed under local anesthesia. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)01110-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Małecki P, Tracz J, Łuczak M, Figlerowicz M, Mazur-Melewska K, Służewski W, Mania A. Serum proteome assessment in nonalcoholic fatty liver disease in children: a preliminary study. Expert Rev Proteomics 2020; 17:623-632. [PMID: 32921203 DOI: 10.1080/14789450.2020.1810020] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Nonalcoholic fatty disease (NAFLD) affects 3-10% of the pediatric population, making it the most common chronic liver disease among children. The aim of the study is to identify potential biomarkers enabling the diagnosis of NAFLD and monitoring the course of the disease. METHODS Proteome analysis was performed in a group of 30 patients (19 boys and 11 girls) in total, of whom 16 children had previously diagnosed NAFLD based on the abdominal ultrasound after excluding other diseases of this organ. RESULTS A total of 297 proteins have been identified. Thirty-seven proteins (responsible for inflammation, stress response, and regulation of this process) differentiating both experimental groups were identified. Up-regulated proteins included afamin, retinol-binding protein-4, complement components, and hemopexin; while serum protease inhibitors, clusterin, immunoglobulin chains, and vitamin D binding protein were found in the down-regulated group. The correlation between selected proteins and indicators of noninvasive assessment of liver fibrosis (APRI, FIB-4) as well as differences between the serum proteome of patients with normal weight, overweight, and obesity were also assessed. CONCLUSION The plasma protein profile is significantly altered in nonalcoholic liver disease in children and may prove to be a valuable source of biomarkers to evaluate the extent of liver disease.
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Affiliation(s)
- Paweł Małecki
- Department of Infectious Diseases, Poznan University of Medical Sciences , Poznan, Poland
| | - Joanna Tracz
- Institute of Bioorganic Chemistry Polish Academy of Sciences , Poznań, Poland
| | - Magdalena Łuczak
- Institute of Bioorganic Chemistry Polish Academy of Sciences , Poznań, Poland
| | - Magdalena Figlerowicz
- Department of Infectious Diseases, Poznan University of Medical Sciences , Poznan, Poland
| | | | - Wojciech Służewski
- Department of Infectious Diseases, Poznan University of Medical Sciences , Poznan, Poland
| | - Anna Mania
- Department of Infectious Diseases, Poznan University of Medical Sciences , Poznan, Poland
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Uchida Y, Goto R, Takeuchi H, Łuczak M, Usui T, Tachikawa M, Terasaki T. Abundant Expression of OCT2, MATE1, OAT1, OAT3, PEPT2, BCRP, MDR1, and xCT Transporters in Blood-Arachnoid Barrier of Pig and Polarized Localizations at CSF- and Blood-Facing Plasma Membranes. Drug Metab Dispos 2019; 48:135-145. [PMID: 31771948 DOI: 10.1124/dmd.119.089516] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 11/19/2019] [Indexed: 11/22/2022] Open
Abstract
The physiologic and pharmacologic roles of the blood-arachnoid barrier (BAB) remain unclear. Therefore, the purpose of the present study was to comprehensively evaluate and compare the absolute protein expression levels of transporters in the leptomeninges and plexus per cerebrum, and to determine the localizations of transporters at the cerebrospinal fluid (CSF)-facing and blood (dura)-facing plasma membranes of the BAB in pig. Using multidrug resistance protein 1 (MDR1) and organic anion transporter (OAT) 1 as blood (dura)-facing and CSF-facing plasma membrane marker proteins, respectively, we established that breast cancer resistance protein (BCRP), multidrug resistance-associated protein (MRP) 4, organic anion-transporting polypeptide (OATP) 2B1, multidrug and toxin extrusion protein 1 (MATE1), and glucose transporter 1 (GLUT1) are localized at the blood-facing plasma membrane, and OAT3, peptide transporter (PEPT) 2, MRP3, organic cation transporter (OCT) 2, xCT, monocarboxylate transporter (MCT) 1, MCT4, and MCT8 are localized at the CSF-facing plasma membrane of the BAB. The absolute protein expression levels of OAT1, OAT3, MDR1, BCRP, PEPT2, xCT, MATE1, OCT2, and 4f2hc in the whole BAB surrounding the entire cerebrum were much larger than those in the total of the choroid plexuses forming the blood-cerebrospinal fluid barrier (BCSFB). Although MRP4, OATP2B1, MCT8, GLUT1, and MCT1 were also statistically significantly more abundant in the BAB than in the choroid plexuses per porcine cerebrum, these transporters were nevertheless almost equally distributed between the two barriers. In contrast, OATP1A2, MRP1, OATP3A1, and OCTN2 were specifically expressed in the choroid plexus. These results should be helpful in understanding the relative overall importance of transport at the BAB compared with that at the BCSFB, as well as the rank order of transport capacities among different transporters at the BAB, and the directions of transport mediated by individual transporters. SIGNIFICANCE STATEMENT: We found that BCRP, MRP4, OATP2B1, MATE1, and GLUT1 localize at the blood-facing plasma membrane of the blood-arachnoid barrier (BAB), while OAT3, PEPT2, MRP3, OCT2, xCT, MCT1, MCT4, and MCT8 localize at the CSF-facing plasma membrane. 4F2hc is expressed in both membranes. For OAT1, OAT3, MDR1, BCRP, PEPT2, xCT, MATE1, OCT2, and 4f2hc, the absolute protein expression levels in the whole BAB surrounding the entire cerebrum are much greater than the total amounts in the choroid plexuses.
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Affiliation(s)
- Yasuo Uchida
- Graduate School of Pharmaceutical Sciences (Y.U., M.Ł., T.U., M.T., T.T.) and Faculty of Pharmaceutical Sciences (Y.U., R.G., H.T., M.T., T.T.), Tohoku University, Sendai, Japan; and Institute of Bioorganic Chemistry, Polish Academy of Sciences, Warsaw, Poland (M.Ł.)
| | - Ryohei Goto
- Graduate School of Pharmaceutical Sciences (Y.U., M.Ł., T.U., M.T., T.T.) and Faculty of Pharmaceutical Sciences (Y.U., R.G., H.T., M.T., T.T.), Tohoku University, Sendai, Japan; and Institute of Bioorganic Chemistry, Polish Academy of Sciences, Warsaw, Poland (M.Ł.)
| | - Hina Takeuchi
- Graduate School of Pharmaceutical Sciences (Y.U., M.Ł., T.U., M.T., T.T.) and Faculty of Pharmaceutical Sciences (Y.U., R.G., H.T., M.T., T.T.), Tohoku University, Sendai, Japan; and Institute of Bioorganic Chemistry, Polish Academy of Sciences, Warsaw, Poland (M.Ł.)
| | - Magdalena Łuczak
- Graduate School of Pharmaceutical Sciences (Y.U., M.Ł., T.U., M.T., T.T.) and Faculty of Pharmaceutical Sciences (Y.U., R.G., H.T., M.T., T.T.), Tohoku University, Sendai, Japan; and Institute of Bioorganic Chemistry, Polish Academy of Sciences, Warsaw, Poland (M.Ł.)
| | - Takuya Usui
- Graduate School of Pharmaceutical Sciences (Y.U., M.Ł., T.U., M.T., T.T.) and Faculty of Pharmaceutical Sciences (Y.U., R.G., H.T., M.T., T.T.), Tohoku University, Sendai, Japan; and Institute of Bioorganic Chemistry, Polish Academy of Sciences, Warsaw, Poland (M.Ł.)
| | - Masanori Tachikawa
- Graduate School of Pharmaceutical Sciences (Y.U., M.Ł., T.U., M.T., T.T.) and Faculty of Pharmaceutical Sciences (Y.U., R.G., H.T., M.T., T.T.), Tohoku University, Sendai, Japan; and Institute of Bioorganic Chemistry, Polish Academy of Sciences, Warsaw, Poland (M.Ł.)
| | - Tetsuya Terasaki
- Graduate School of Pharmaceutical Sciences (Y.U., M.Ł., T.U., M.T., T.T.) and Faculty of Pharmaceutical Sciences (Y.U., R.G., H.T., M.T., T.T.), Tohoku University, Sendai, Japan; and Institute of Bioorganic Chemistry, Polish Academy of Sciences, Warsaw, Poland (M.Ł.)
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Rodziewicz P, Chmielewska K, Sawikowska A, Marczak Ł, Łuczak M, Bednarek P, Mikołajczak K, Ogrodowicz P, Kuczyńska A, Krajewski P, Stobiecki M. Identification of drought responsive proteins and related proteomic QTLs in barley. J Exp Bot 2019; 70:2823-2837. [PMID: 30816960 PMCID: PMC6506773 DOI: 10.1093/jxb/erz075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 02/11/2019] [Indexed: 05/08/2023]
Abstract
Drought is a major abiotic stress that negatively influences crop yield. Breeding strategies for improved drought resistance require an improved knowledge of plant drought responses. We therefore applied drought to barley recombinant inbred lines and their parental genotypes shortly before tillering. A large-scale proteomic analysis of leaf and root tissue revealed proteins that respond to drought in a genotype-specific manner. Of these, Rubisco activase in chloroplast, luminal binding protein in endoplasmic reticulum, phosphoglycerate mutase, glutathione S-transferase, heat shock proteins and enzymes involved in phenylpropanoid biosynthesis showed strong genotype×environment interactions. These data were subjected to genetic linkage analysis and the identification of proteomic QTLs that have potential value in marker-assisted breeding programs.
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Affiliation(s)
- Paweł Rodziewicz
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61–704 Poznań, Poland
| | - Klaudia Chmielewska
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61–704 Poznań, Poland
| | - Aneta Sawikowska
- Institute of Plant Genetics Polish Academy of Sciences, Strzeszyńska 34, 60–479 Poznań, Poland
- Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, Wojska Polskiego 28, Poznań, Poland
| | - Łukasz Marczak
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61–704 Poznań, Poland
| | - Magdalena Łuczak
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61–704 Poznań, Poland
| | - Paweł Bednarek
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61–704 Poznań, Poland
| | - Krzysztof Mikołajczak
- Institute of Plant Genetics Polish Academy of Sciences, Strzeszyńska 34, 60–479 Poznań, Poland
| | - Piotr Ogrodowicz
- Institute of Plant Genetics Polish Academy of Sciences, Strzeszyńska 34, 60–479 Poznań, Poland
| | - Anetta Kuczyńska
- Institute of Plant Genetics Polish Academy of Sciences, Strzeszyńska 34, 60–479 Poznań, Poland
| | - Paweł Krajewski
- Institute of Plant Genetics Polish Academy of Sciences, Strzeszyńska 34, 60–479 Poznań, Poland
- Correspondence: or
| | - Maciej Stobiecki
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Noskowskiego 12/14, 61–704 Poznań, Poland
- Correspondence: or
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Waliczek M, Bąchor R, Kijewska M, Gąszczyk D, Panek-Laszczyńska K, Konieczny A, Dąbrowska K, Witkiewicz W, Marek-Bukowiec K, Tracz J, Łuczak M, Szewczuk Z, Stefanowicz P. Isobaric duplex based on a combination of 16O/18O enzymatic exchange and labeling with pyrylium salts. Anal Chim Acta 2019; 1048:96-104. [DOI: 10.1016/j.aca.2018.10.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 10/04/2018] [Accepted: 10/07/2018] [Indexed: 11/30/2022]
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Zdarta J, Antecka K, Jędrzak A, Synoradzki K, Łuczak M, Jesionowski T. Biopolymers conjugated with magnetite as support materials for trypsin immobilization and protein digestion. Colloids Surf B Biointerfaces 2018; 169:118-125. [DOI: 10.1016/j.colsurfb.2018.05.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 05/06/2018] [Accepted: 05/07/2018] [Indexed: 02/02/2023]
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Handschuh L, Kaźmierczak M, Milewski MC, Góralski M, Łuczak M, Wojtaszewska M, Uszczyńska-Ratajczak B, Lewandowski K, Komarnicki M, Figlerowicz M. Gene expression profiling of acute myeloid leukemia samples from adult patients with AML-M1 and -M2 through boutique microarrays, real-time PCR and droplet digital PCR. Int J Oncol 2017; 52:656-678. [PMID: 29286103 PMCID: PMC5807040 DOI: 10.3892/ijo.2017.4233] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 12/12/2017] [Indexed: 01/25/2023] Open
Abstract
Acute myeloid leukemia (AML) is the most common and severe form of acute leukemia diagnosed in adults. Owing to its heterogeneity, AML is divided into classes associated with different treatment outcomes and specific gene expression profiles. Based on previous studies on AML, in this study, we designed and generated an AML-array containing 900 oligonucleotide probes complementary to human genes implicated in hematopoietic cell differentiation and maturation, proliferation, apoptosis and leukemic transformation. The AML-array was used to hybridize 118 samples from 33 patients with AML of the M1 and M2 subtypes of the French-American-British (FAB) classification and 15 healthy volunteers (HV). Rigorous analysis of the microarray data revealed that 83 genes were differentially expressed between the patients with AML and the HV, including genes not yet discussed in the context of AML pathogenesis. The most overexpressed genes in AML were STMN1, KITLG, CDK6, MCM5, KRAS, CEBPA, MYC, ANGPT1, SRGN, RPLP0, ENO1 and SET, whereas the most underexpressed genes were IFITM1, LTB, FCN1, BIRC3, LYZ, ADD3, S100A9, FCER1G, PTRPE, CD74 and TMSB4X. The overexpression of the CPA3 gene was specific for AML with mutated NPM1 and FLT3. Although the microarray-based method was insufficient to differentiate between any other AML subgroups, quantitative PCR approaches enabled us to identify 3 genes (ANXA3, S100A9 and WT1) whose expression can be used to discriminate between the 2 studied AML FAB subtypes. The expression levels of the ANXA3 and S100A9 genes were increased, whereas those of WT1 were decreased in the AML-M2 compared to the AML-M1 group. We also examined the association between the STMN1, CAT and ABL1 genes, and the FLT3 and NPM1 mutation status. FLT3+/NPM1− AML was associated with the highest expression of STMN1, and ABL1 was upregulated in FLT3+ AML and CAT in FLT3− AML, irrespectively of the NPM1 mutation status. Moreover, our results indicated that CAT and WT1 gene expression levels correlated with the response to therapy. CAT expression was highest in patients who remained longer under complete remission, whereas WT1 expression increased with treatment resistance. On the whole, this study demonstrates that the AML-array can potentially serve as a first-line screening tool, and may be helpful for the diagnosis of AML, whereas the differentiation between AML subgroups can be more successfully performed with PCR-based analysis of a few marker genes.
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Affiliation(s)
- Luiza Handschuh
- European Center for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland
| | - Maciej Kaźmierczak
- Department of Hematology and Bone Marrow Transplantation, Poznan University of Medical Sciences, 60-569 Poznan, Poland
| | - Marek C Milewski
- European Center for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland
| | - Michał Góralski
- European Center for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland
| | - Magdalena Łuczak
- European Center for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland
| | - Marzena Wojtaszewska
- Department of Hematology and Bone Marrow Transplantation, Poznan University of Medical Sciences, 60-569 Poznan, Poland
| | - Barbara Uszczyńska-Ratajczak
- European Center for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland
| | - Krzysztof Lewandowski
- Department of Hematology and Bone Marrow Transplantation, Poznan University of Medical Sciences, 60-569 Poznan, Poland
| | - Mieczysław Komarnicki
- Department of Hematology and Bone Marrow Transplantation, Poznan University of Medical Sciences, 60-569 Poznan, Poland
| | - Marek Figlerowicz
- European Center for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704 Poznan, Poland
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Łuczak M, Kubicki T, Rzetelska Z, Szczepaniak T, Przybyłowicz-Chalecka A, Ratajczak B, Czerwińska-Rybak J, Nowicki A, Joks M, Jakubowiak A, Komarnicki M, Dytfeld D. Comparative proteomic profiling of sera from patients with refractory multiple myeloma reveals potential biomarkers predicting response to bortezomib-based therapy. Pol Arch Intern Med 2017; 127:392-400. [PMID: 28546528 DOI: 10.20452/pamw.4032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
INTRODUCTION In the era of implementing novel agents in multiple myeloma (MM) regimens, drug resistance has become a key factor undermining the results of treatment. Identifying biomarkers allows the prediction of therapy outcomes with specific agents and may lead to the avoidance of resistance. OBJECTIVES This study aimed to identify biomarkers in the pretreatment sera of patients with refractory/ relapsed MM that differ from those in the sera of patients who achieved a better depth of response with bortezomib-containing therapy. PATIENTS AND METHODS Pretreatment serum samples were obtained from 61 proteasome inhibitor-naive, transplant-eligible patients who were eligible for salvage PAD (bortezomib, doxorubicin, and dexamethasone) or VTD (bortezomib, thalidomide, and dexamethasone) chemotherapy. Based on their response to therapy, patients were classified into 3 groups: complete or very good partial response, partial response, and progressive or stable disease. A comparative proteomic analysis of the groups was performed. RESULTS The analyzed groups significantly differed in terms of both overall survival and progression‑free survival. In total, 632 proteins were identified. The proteomic signature revealed 54 proteins that differentiated each analyzed experimental group. Functional analysis revealed that the main identified pathways (17 proteins) involved the regulation of hydrolase activity and cellular response to stimuli. The identified proteins included apolipoprotein C1, complement components, and sulfhydryl oxidase 1. CONCLUSIONS Our results demonstrated that the label-free proteomic analysis is a useful method for describing proteins differentially expressed in the sera of patients with MM. Further studies are needed to analyze the use of identified proteins as biomarkers.
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Gadher SJ, Marczak Ł, Łuczak M, Stobiecki M, Widlak P, Kovarova H. Proteomic landscape in Central and Eastern Europe: the 9th Central and Eastern European Proteomic Conference, Poznań, Poland. Expert Rev Proteomics 2015; 13:5-7. [DOI: 10.1586/14789450.2016.1116391] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sobieszczuk-Nowicka E, Zmienko A, Samelak-Czajka A, Łuczak M, Pietrowska-Borek M, Iorio R, Del Duca S, Figlerowicz M, Legocka J. Dark-induced senescence of barley leaves involves activation of plastid transglutaminases. Amino Acids 2015; 47:825-38. [PMID: 25583605 PMCID: PMC4361728 DOI: 10.1007/s00726-014-1912-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 12/27/2014] [Indexed: 12/13/2022]
Abstract
Transglutaminases (E.C. 2.3.2.13) catalyze the post-translational modification of proteins by establishing ε-(γ-glutamyl) lysine isopeptide bonds and by the covalent conjugation of polyamines to endo-glutamyl residues of proteins. In light of the confirmed role of transglutaminases in animal cell apoptosis and only limited information on the role of these enzymes in plant senescence, we decided to investigate the activity of chloroplast transglutaminases (ChlTGases) and the fate of chloroplast-associated polyamines in Hordeum vulgare L. 'Nagrad' leaves, where the senescence process was induced by darkness (day 0) and continued until chloroplast degradation (day 12). Using an anti-TGase antibody, we detected on a subcellular level, the ChlTGases that were associated with destacked/degraded thylakoid membranes, and beginning on day 5, were also found in the stroma. Colorimetric and radiometric assays revealed during senescence an increase in ChlTGases enzymatic activity. The MS/MS identification of plastid proteins conjugated with exogenous polyamines had shown that the ChlTGases are engaged in the post-translational modification of proteins involved in photosystem organization, stress response, and oxidation processes. We also computationally identified the cDNA of Hv-Png1-like, a barley homologue of the Arabidopsis AtPng1 gene. Its mRNA level was raised from days 3 to 10, indicating that transcriptional regulation controls the activity of barley ChlTGases. Together, the presented results deepen our knowledge of the mechanisms of the events happened in dark-induced senescence of barley leaves that might be activation of plastid transglutaminases.
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Affiliation(s)
- E Sobieszczuk-Nowicka
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University of Poznań, ul. Umultowska 89, 61-614, Poznań, Poland,
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Suszyńska-Zajczyk J, Łuczak M, Marczak Ł, Jakubowski H. Hyperhomocysteinemia and Bleomycin Hydrolase Modulate the Expression of Mouse Brain Proteins Involved in Neurodegeneration. ACTA ACUST UNITED AC 2014; 40:713-26. [DOI: 10.3233/jad-132033] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
| | | | | | - Hieronim Jakubowski
- Institute of Bioorganic Chemistry, Poznań, Poland
- Department of Biochemistry and Biotechnology, University of Life Sciences, Poznań, Poland
- Department of Microbiology & Molecular Genetics, Rutgers-New Jersey Medical School, International Center for Public Health, Newark, NJ, USA
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Młynarczyk A, Młynarczyk G, Pupek J, Bilewska A, Kawecki D, Łuczak M, Gozdowska J, Durlik M, Paczek L, Chmura A, Rowińnski W. Serratia marcescens isolated in 2005 from clinical specimens from patients with diminished immunity. Transplant Proc 2008; 39:2879-82. [PMID: 18022007 DOI: 10.1016/j.transproceed.2007.08.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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]
Abstract
Serratia marcescens is an important agent in hospital infections. The aim of this paper was to compare the resistance patterns of S. marcescens strains isolated during 1 year from patients of various wards of the Institute of Transplantology. The mechanisms of beta-lactam antibiotic resistance were of especial interest. We investigated the 81 strains of S. marcescens, isolated during 2005 from patients on 3 wards and 1 clinic of the Transplantation Institute. An unusually high resistance to most antibiotics was observed among S. marcescens strains. Extended spectrum beta-lactamases (ESBLs) were probably produced by 63.2% to 84.6% of strains, depending on the ward. Additionally, about 30% of them were probably derepressed AmpC producers. The patterns of resistance indicated that at least 2 resistant clones of S. marcescens spread among the patients. One of the clones demonstrated both ESBL and derepressed AmpC production and was susceptible only to carbapenems. The second, producing ESBL, was susceptible to piperacillin/tazobactam and carbapenems. All investigated strains were resistant to nitrofurantoin. Strains of the second group were rarely susceptible to other antibiotics: aminoglycosides, ciprofloxacin, cotrimoxazole, or fosfomycin.
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Affiliation(s)
- A Młynarczyk
- Department of Medical Microbiology, Warsaw Medical University, Warsaw, Poland.
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14
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Młynarczyk G, Grzybowska W, Młynarczyk A, Tyski S, Kawecki D, Łuczak M, Durlik M, Pączek L, Chmura A, Rowiński W. Occurrence of Glycopeptide-Resistant Enterococci in Transplant Medicine Internal Wards in 2001–2005. Transplant Proc 2007; 39:2886-9. [DOI: 10.1016/j.transproceed.2007.08.072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Sawicka-Grzelak A, Rokosz A, Przybylski M, Kawecki D, Krawczyk E, Rowiński W, Durlik M, Paczek L, Łuczak M. Clinical Glycopeptide-Resistant Enterococci Isolated From Patients After Solid Organ Transplantation. Transplant Proc 2006; 38:144-6. [PMID: 16504687 DOI: 10.1016/j.transproceed.2005.11.095] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to confirm the identification and resistance to vancomycin and teicoplanin of nosocomial enterococcal strains using molecular biology methods. Glycopeptide-resistant enterococci (GRE) strains were isolated from clinical specimens of hospitalized patients. Bacterial identification was performed in an automatic ATB Expression system (bioMérieux SA). Susceptibility to glycopeptides was determined by the disc diffusion method and Etest (AB BIODISK, Sweden). We performed polymerase chain reactions (PCR) for Enterococcus faecium and E. faecalis identification and van genes detection. Fifteen GRE strains were cultured over 2 years (2003-2004). Fourteen isolates were highly resistant to vancomycin (MIC range, 128->256 mg/L) and teicoplanin (MIC range, 32->256 mg/L). Twelve strains harbored van A gene (Van A phenotype). Seven isolates were identified as E. faecium and seven as E. faecalis by the multiplex-PCR method. One strain-E. casseliflavus-showed low resistance to vancomycin (MIC 8 mg/L) with retained susceptibility to teicoplanin (MIC 4 mg/L). It harbored the van C2/C3 gene and was identified as the Van C2/C3 phenotype. GRE strains were more often isolated from hospitalized patients in Poland. Constant monitoring by reliable microbiological methods has become necessary to prevent the spread of these strains in the hospital environment.
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Affiliation(s)
- A Sawicka-Grzelak
- Department of Medical Microbiology, Warsaw Medical University, ul. Chałubińskiego 5, 02-004 Warsaw, Poland.
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16
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Swoboda-Kopeć E, Rokosz A, Sawicka-Grzelak A, Wróblewska M, Krawczyk E, Stelmach E, Łuczak M. [Etiologic agents of fungemia in hospitalized patients]. Med Dosw Mikrobiol 2002; 53:291-5. [PMID: 11785187] [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: 02/23/2023]
Abstract
The aim of performed examinations was the analysis of fungi as etiological agents of blood infections in patients hospitalized in surgical wards, internal medicine wards and intensive care units of the Medical Academy Central Clinical Hospital in Warsaw. Blood samples from patients hospitalized in 1997 were examined. Peripheral blood samples were incubated in BacT/Alert system (Organon Teknika, USA). Positive blood samples were inoculated on Sabouraud medium with chloramphenicol (bioMerieux, France or Oxoid, England). The time of cultivation was from 48 hours to 7 days at 30 degrees C. Fungal strains were identified by standard mycological procedures with the use of chromogenic medium BBL CHROMagar Candida (Becton Dickinson, USA) and biochemical test ID 32 C (bioMerieux, France). Susceptibility of strains to antifungal agents was determined by ATB FUNGUS method (bioMerieux, France). The total number of positive blood cultures in 1997 was 1380. Forty-two fungal strains were isolated from blood samples (3%). Strains belonged to the following species: C. albicans (17 isolates), C. parapsilosis (15), C. glabrata (3), melibiosica (2), C. pelliculosa (2), C. guilliermondii (1), C. tropicalis (1) and T. beigelii (1). Among fungi cultured from patients hospitalized in operative wards dominated C. parapsilosis (11) and C. albicans (10) strains, whereas from patients hospitalized in conservative wards most often C. albicans (6) strains were isolated. Candida strains were mostly susceptible to antifungal agents tested. It was interesting to culture Trichosporon beigelii (T. cutaneum) strain as an etiological agent of fungemia. This strain was multidrug-resistant.
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Młynarczyk A, Młynarczyk G, Łuczak M, Grzesik A, Lewandowska M, Jeljaszewicz J. [Antibiotic resistance of Staphylococcus aureus strains isolated in two different Warsaw hospitals]. Med Dosw Mikrobiol 2002; 53:217-25. [PMID: 11785178] [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: 02/23/2023]
Abstract
S. aureus strains isolated in the same period from different specimens obtained from patients of two different hospitals were compared. The significant differences were observed in the frequency of resistance determinants between strains of these hospitals. The most important was the difference in the prevalence of MRSA. In the first hospital the percentage of MRSA was 40% whereas in the second one only 20%. The resistance to the other antibiotics was also compared, and independently from the compared group: MRSA, MSSA or all, the prevalence of resistance determinants was higher in the first hospital than in the second. Although the frequencies of MRSA in both investigated hospitals were relatively high comparing to the other European countries and in the first hospital even alarming, isolated MRSA strains are less resistant to other antibiotics than MRSA in other countries.
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Affiliation(s)
- A Młynarczyk
- Katedra i Zakład Mikrobiologii Lekarskiej Centrum Biostruktury AM w Warszawie
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Kobus M, Krawczyk E, Kopczacki P, Daniewski W, Łuczak M. [Influence of newly synthesized sesquiterpenes--analogs of taxol on multiplication of herpes simplex virus (HSV-1MC) and retrovirus (Mo-MSV)]. Med Dosw Mikrobiol 2002; 53:283-9. [PMID: 11785186] [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: 02/23/2023]
Abstract
The study comprised newly synthesized sesquiterpenoid analogs of taxol. The synthesis of the compounds was performed at the Institute of Organic Chemistry, Polish Academy of Sciences. Cytotoxicity of the compound was assessed using formazan method. In in vitro studies the cell cultures were infected with HSV-1MC. The tested compounds were added in different concentrations to the cell culture after viral infection. Titer of the virus was expressed in TCID50/ml at particular stages of the experiments. In in vivo experiments NMRI mice were infected intramuscularly with a Moloney murine sarcoma virus (Mo-MSV). Tested compounds were administered to the mice intravenously on the day of virus inoculation. In Mo-MSV-infected mice dynamics of tumor progression and regression was assessed, as well as a mean time interval of tumor disappearance. Among the compounds tested: isovellerol-13-N-benzoyl-(2'R,3'S)-3'-phenylisoserinate, 5-deoxy-lactarolid B 8-[N-benzoyl-(2'R,3'S)-3'-phenylisoserinate] and isolactarorufin 8-epi-[N-benzoyl-(2'R,3'S)-3'-phenylisoserinate] showed significant antiviral activity in in vitro experiments. In in vivo experiments only lactarorufin A 8-[N-benzoyl-(2'R,3'S)-3'-phenylisoserinate] significantly inhibited the development of tumors and shortened the time of their total regression in the course of Mo-MSV infection.
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Affiliation(s)
- M Kobus
- Katedra i Zakład Mikrobiologii Lekarskiej, Centrum Biostruktury, Akademia Medyczna w Warszawie
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19
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Rokosz A, Sawicka-Grzelak A, Kot K, Meszaros J, Łuczak M. [Use of the Etest method for antimicrobial susceptibility testing of obligate anaerobes]. Med Dosw Mikrobiol 2002; 53:167-75. [PMID: 11757426] [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: 02/23/2023]
Abstract
The aim of this study was to evaluate Etest usefulness for antimicrobial susceptibility testing of obligate anaerobes and to compare the activity of five antibacterial drugs against clinical strains of anaerobes. One hundred strains of obligate anaerobes were tested: 2 reference strains (B. fragilis ATCC 25285 and B. thetaiotaomicron ATCC 29741) and 98 clinical strains isolated from patients of the Infant Jesus Clinical Hospital--Center for Trauma Treatment in Warsaw during the last three years (1997-1999). Strains of seven genera of obligate nonsporeforming anaerobes (Bacteroides, Prevotella, Porphyromonas, Fusobacterium, Peptostreptococcus, Propionibacterium and Actinomyces) and strains of two sporeforming species (C. perfringens and C. difficile) were examined. The MIC values were determined by the gradient diffusion method Etest (AB BIODISK, Sweden). Wilkins-Chalgren solid medium supplemented with 5% of sheep blood was used. Test plates were incubated at 35 degrees C for 48 hours in glove-box (85% N2, 10% H2, 5% CO2). The MIC values for each strain and antimicrobial agent, and the MIC ranges for bacteria of the same species were established. Ten strains resistant to clindamycin, ten resistant to piperacillin, and ten resistant to imipenem were detected. Seven strains were resistant to metronidazole and two strains to piperacillin combined with tazobactam. Tazobactam restored the susceptibility of eight strains to piperacillin. Obtained results confirm that Etest method is useful for antimicrobial susceptibility testing of obligate anaerobes. Older (clindamycin and metronidazole) and newer (piperacillin, piperacillin/tazobactam and imipenem) antimicrobial agents revealed high and comparable activity against clinical strains of obligate anaerobes. The percentage of strains susceptible to tested antimicrobials was > or = 90. These antimicrobials may be still useful in the empiric treatment of infections caused by medically important anaerobes.
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Affiliation(s)
- A Rokosz
- Katedra i Zakład Mikrobiologii Lekarskiej AM w Warszawie
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20
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Swoboda-Kopeć E, Kobus M, Krawczyk E, Stelmach E, Olszewski WL, Tripathi FM, Łuczak M. [Contribution of fungi to chronic dermatitis and lymphangitis in patients with filariasis]. Med Dosw Mikrobiol 2002; 53:207-12. [PMID: 11757430] [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: 02/23/2023]
Abstract
Adenolymphangitis is a common occurrence in filarial lymphedema. Damage to the lymphatics by F. bancrofti is followed by obliteration of lymph vessel and lymph stasis. Obstruction of lymphatics prevents the microbs skin penetration. Presented studies were performed to evaluate the role of fungi colonization of the skin among patients with filarial lymphedema. The fungal colonization of skin in patients with filarial lymphedema may be an important reason for chronic inflammatory disorders.
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Affiliation(s)
- E Swoboda-Kopeć
- Katedra i Zakład Mikrobiologii Lekarskiej CB, Akademii Medycznej w Warszawie
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21
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Pituch H, van den Braak N, van Leeuwen W, van Belkum A, Martirosian G, Obuch-Woszczatyński P, Łuczak M, Meisel-Mikołajczyk F. Clonal dissemination of a toxin-A-negative/toxin-B-positive Clostridium difficile strain from patients with antibiotic-associated diarrhea in Poland. Clin Microbiol Infect 2001; 7:442-6. [PMID: 11591209 DOI: 10.1046/j.1198-743x.2001.00312.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine the incidence of toxin-A-negative/toxin-B-positive Clostridium difficile strains and their genetic relatedness in the feces of patients suffering from antibiotic-associated diarrhea (AAD) in Polish hospitals. METHODS C. difficile strains were cultured from patients' stool samples. The present study characterises these strains with respect to their cytopathogenicity on McCoy cells and the absence of toxin A despite a functional toxin B as determined with commercial test kits (Culturette Brand Toxin CD-TCD toxin A test and C. difficile Tox A/B test). In addition, PCR using different primer pairs aiming at non-repeating or repeating regions of the toxin A and B genes were used to confirm the findings. All toxin A(-)B(+) strains were genetically characterised by random amplification of polymorphic DNA (RAPD) analysis, PCR ribotyping and, in part, pulsed-field gel electrophoresis (PFGE) of DNA macrorestriction fragments. RESULTS We here present the presence of 17 toxin A(-)B(+) strains among 159 C. difficile strains (11%) isolated from fecal samples from 413 patients with antibiotic-associated diarrhea. All 17 strains possessed the toxin B gene, demonstrated a cytopathogenic effect on the McCoy cells, and were positive in the Tox A/B test. Molecular typing of these 17 C. difficile strains revealed that 7 of 17 (41%) toxin A(-)/B(+) C. difficile strains could not be discriminated. It appeared that these strains had a genotype that could not be distinguished from that of a Japanese control strain. CONCLUSION Our observations imply that a particular genotype of toxin A(-)B(+) C. difficile has spread extensively, not only in Poland but possibly even worldwide.
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Affiliation(s)
- H Pituch
- Department of Medical Microbiology, Center of Biostructure Research, The Medical University of Warsaw, Warsaw, Poland.
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Pituch H, Martirosian G, Obuch-Woszczatyński P, Meisel-Mikołajczyk F, Łuczak M. [Intestinal flora of patients with suspected antibiotic associated diarrhea (AAD). I. Clostridium perfringens]. Med Dosw Mikrobiol 2001; 52:375-82. [PMID: 11286179] [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: 02/19/2023]
Abstract
Stool samples of 158 patients suspected of antibiotic-associated diarrhoea (AAD) were studied. Toxin A of C. difficile and enterotoxin of C. perfringens were detected in stool samples by immunoenzymatic assays and PCR. In 35 stool samples toxin A of C. difficile was detected and in 48 cases (30%) C. difficile strains were cultured from 21 stool samples (13%). The presence of the cpe gene of C. perfringens, enabling the production of enterotoxin, could not be detected by PCR, both in stool samples and in isolated strains, using ent 1 and ent 2 primer pairs. C. difficile and C. perfringens were isolated from the same stool samples in 4 cases. From stool samples of two patients with AAD C. perfringens strains, thermoresistant spores were cultured.
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Affiliation(s)
- H Pituch
- Katedra i Zakład Mikrobiologii Lekarskiej AM w Warszawie
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23
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Zabicka D, Młynarczyk G, Łuczak M. [Interspecies lysogenization in staphylococci: transfer of bacteriophage converting enterotoxin A from a clinical strain of Staphylococcus aureus to Staphylococcus intermedius]. Med Dosw Mikrobiol 2001; 52:317-26. [PMID: 11286173] [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: 02/19/2023]
Abstract
The ability of lysogenization was examined of 50 S. intermedius strains and of 77 strains belonging to 14 different species of coagulase-negative staphylococci using 8 enterotoxin A converting bacteriophages isolated from S. aureus. All the examined bacteriophages showed lytic activity against at least 1 of 11 susceptible strains of S. intermedius to them. Lytic activity towards coagulase-negative staphylococci was observed for 6 of 8 examined bacteriophages. Two bacteriophages were active against 1 of 9 examined S. capitis strains, one against 1 of 11 examined S. haemolyticus strains, four against 1 of 6 examined S. lugdunensis strains, three against 1 of 6 examined S. warneri strains and one against 1 of 5 examined S. xylosus strains. Lysogenization with bacteriophage f421-1 able to convert positively enterotoxin A and staphylokinase and negatively beta-haemolysin of one S. intermedius strain was successful. S. intermedius lysogenized with phi 421-1 was able to produce both enterotoxin A and staphylokinase and lost ability to produce beta-haemolysin. Our results showed a broad lytic spectrum and interspecies host range of some S. aureus bacteriophages and the ability of interspecies transfer of bacteriophages between S. aureus and S. intermedius.
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Affiliation(s)
- D Zabicka
- Katedra i Zakład Mikrobiologii Lekarskiej, Centrum Biostruktury Akademii Medycznej w Warszawie
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Łuczak M, Obuch-Woszczatyński P, Pituch H, Leszczyński P, Martirosian G, Patrick S, Poxton I, Wintermans RG, Dubreuil L, Meisel-Mikołajczyk F. Search for enterotoxin gene in Bacteroides fragilis strains isolated from clinical specimens in Poland, Great Britain, The Netherlands and France. Med Sci Monit 2001; 7:222-5. [PMID: 11257725] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
BACKGROUND Bacteroides fragilis is a member of normal human flora and well known pathogenic agent. This bacterium produces many virulence factors. In 1984 new virulence factor--enterotoxin was described. The aim of the study was to search for enterotoxin gene in B. fragilis strains isolated from clinical specimens. MATERIAL AND METHODS Strains isolated in Poland, Great Britain, France and the Netherlands were cultured on BBE medium. For DNA isolation Genomic DNA PREP PLUS isolation kit manufactured by A&A Biotechnology (Poland) was used. In order to detect enterotoxin (fragilysin) gene, polymerase chain reaction (PCR) was applied utilizing the following primers: 404 (GAG CGG AAG ACG GTG TAT GTG ATT TGT) and 407 (TGC TCA GCG CCC AGT ATA TGA CCT AGT). DNA obtained from bacterial cells was amplified in thermocycler Techne. The amplification products were detected by the electrophoresis in 1% agarose gel. RESULTS Among 65 investigated B. fragilis strains, the enterotoxin gene was detected in DNA isolated from 12 strains. CONCLUSION The enterotoxin producing B. fragilis strains were detected among strains isolated from different clinical specimens in Poland, Great Britain, the Netherlands and France.
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Affiliation(s)
- M Łuczak
- Department of Medical Microbiology, Center of Biostructure Research, Medical University of Warsaw, 5 Chałubińskiego St., 02-004 Warsaw, Poland
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Obuch-Woszczatyński P, Pituch H, Martirosian G, Silva J, Meisel-Mikołajczyk F, Łuczak M. [Enterotoxin-producing Bacteroides fragilis strains isolated from horses]. Med Dosw Mikrobiol 2001; 53:161-6. [PMID: 11757425] [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: 04/17/2023]
Abstract
Seven Bacteroides fragilis strains were cultured from samples collected from horses. From all the tested strains, as well as from the reference B. fragilis strains: enterotoxigenic NCTC 11925 and nonenterotoxigenic IPL 323 strain, DNA was isolated using Genomic DNA PREP PLUS isolation kit manufactured by A&A Biotechnology (Poland). To detect the enterotoxin (fragilysin) gene, polymerase chain reaction (PCR) was applied, using the following starters: 404 (GAG CCG AAG ACG GTG TAT GTG ATT TGT) and 407 (TGC TCA GCG CCC AGT ATA TGA CCT AGT). DNA obtained from bacterial cells was amplified in a thermocycler (Techne). The temperature profile was as follows: 1 cycle (4 min. 94 degrees C), 40 cycles (1 min. 94 degrees C, 1 min. 52 degrees C, 1 min. 74 degrees C). Amplification products were detected by electrophoresis in agarose gel (1%) with ethidium bromide added. The presence of the fragilysin gene was detected in two strains. Among the strains isolated from horses enterotoxin gene-possessing Bacteroides fragilis strains (ETBF) can be detected.
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Affiliation(s)
- P Obuch-Woszczatyński
- Katedra i Zakład Mikrobiologii Lekarskiej Centrum Biostruktury, Akademia Medyczna w Warszawie
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