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Hafner E, Schuchter K, Liebhart E, Philipp K. Results of routine fetal nuchal translucency measurement at weeks 10–13 in 4233 unselected pregnant women. Prenat Diagn 1998. [DOI: 10.1002/(sici)1097-0223(199801)18:1<29::aid-pd213>3.0.co;2-n] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Koenders M, Liebhart E, Wakeman R. Dead-End Filtration with Torsional Shear: Experimental Findings and Theoretical Analysis. Chem Eng Res Des 2001. [DOI: 10.1205/026387601750281626] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Schätzle H, Brouwer EM, Liebhart E, Stevanovic M, Schleiff E. Comparative Phenotypic Analysis of Anabaena sp. PCC 7120 Mutants of Porinlike Genes. J Microbiol Biotechnol 2021; 31:645-658. [PMID: 33879642 PMCID: PMC9705863 DOI: 10.4014/jmb.2103.03009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/05/2021] [Accepted: 04/06/2021] [Indexed: 12/15/2022]
Abstract
Porins are essential for the viability of Gram-negative bacteria. They ensure the uptake of nutrients, can be involved in the maintenance of outer membrane integrity and define the antibiotic or drug resistance of organisms. The function and structure of porins in proteobacteria is well described, while their function in photoautotrophic cyanobacteria has not been systematically explored. We compared the domain architecture of nine putative porins in the filamentous cyanobacterium Anabaena sp. PCC 7120 and analyzed the seven candidates with predicted OprB-domain. Single recombinant mutants of the seven genes were created and their growth capacity under different conditions was analyzed. Most of the putative porins seem to be involved in the transport of salt and copper, as respective mutants were resistant to elevated concentrations of these substances. In turn, only the mutant of alr2231 was less sensitive to elevated zinc concentrations, while mutants of alr0834, alr4741 and all4499 were resistant to high manganese concentrations. Notably the mutant of alr4550 shows a high sensitivity against harmful compounds, which is indicative for a function related to the maintenance of outer membrane integrity. Moreover, the mutant of all5191 exhibited a phenotype which suggests either a higher nitrate demand or an inefficient nitrogen fixation. The dependency of porin membrane insertion on Omp85 proteins was tested exemplarily for Alr4550, and an enhanced aggregation of Alr4550 was observed in two omp85 mutants. The comparative analysis of porin mutants suggests that the proteins in parts perform distinct functions related to envelope integrity and solute uptake.
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research-article |
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Liebhart J, Małolepszy J, Liebhart E, Krusińska E, Bartkowiak A. [Automatic diagnosis of bronchial asthma, chronic bronchitis and pulmonary emphysema]. PNEUMONOLOGIA POLSKA 1984; 52:233-8. [PMID: 6494005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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English Abstract |
41 |
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5
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Liebhart J, Małolepszy J, Wrzyszcz M, Krasnowska M, Liebhart E, Kuliczkowska D, Panaszek B, Machaj Z, Szeliga W. [Nonspecific bronchial hyperreactivity and the degree of allergic sensitization to occupational factors in carpet factory workers]. PNEUMONOLOGIA POLSKA 1987; 55:141-7. [PMID: 3658786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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English Abstract |
38 |
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6
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Yin Z, Liebhart E, Stegmann E, Brötz-Oesterhelt H, Dickschat JS. An isotopic probe to follow the stereochemical course of dehydratase reactions in polyketide and fatty acid biosynthesis. Org Chem Front 2022. [DOI: 10.1039/d2qo00272h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four stereoisomeric and isotopically labelled probes that are suitable to easily follow the stereochemical course of dehydratases have been synthesised.
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Krasnowska M, Liebhart E, Kwaśniewski A, Mołolepszy J. [Effect of pentagastrin on bronchial spasm in patients with bronchial asthma]. PNEUMONOLOGIA POLSKA 1988; 56:513-7. [PMID: 3252192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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English Abstract |
37 |
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8
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Krasnowska M, Liebhart E, Małolepszy J. [Nonspecific bronchial hyperreactivity in patients with hay fever and pollen-induced asthma]. PNEUMONOLOGIA POLSKA 1986; 54:459-63. [PMID: 3575116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Comparative Study |
39 |
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Krasnowska M, Jankowska R, Liebhart E. [Use of lidocaine in the treatment of bronchial asthma]. PNEUMONOLOGIA POLSKA 1982; 50:269-73. [PMID: 6757876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Clinical Trial |
43 |
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Wrzyszcz M, Wolańczyk-Medrala A, Medrala W, Małolepszy J, Liebhart E, Wytrychowski K, Dobek R, Litwa M. [Bronchial hyperreactivity to histamine and levels of serum eosinophil cationic protein in patients with non-atopic asthma]. PNEUMONOLOGIA I ALERGOLOGIA POLSKA 1999; 67:174-9. [PMID: 10570638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
Pathogenesis of non-atopic bronchial asthma remains still an open question. Until now there have been very few studies concerning relationship between eosinophil activation and nonspecific bronchial hyperreactivity to histamine in this form of asthma. Sixteen subjects with mild nonatopic bronchial asthma entered the study. Evaluations of PC 20 for histamine and serum eosinophil cationic protein (ECP) concentration have been performed in all patients. In spite of fact that all patients were considered as mild asthmatic we have observed wide range of PC 20 and serum ECP concentration. Moreover we were able to find statistically significant inverse correlation between PC 20 for histamine and serum eosinophil cationic protein concentration: r = -0.498, p < 0.05. We conclude that eosinophil activation plays an important role in pathophysiology of nonspecific bronchial hyperreactivity in nonatopic bronchial asthma.
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Clinical Trial |
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Wasik F, Małolepszy J, Kibler-Nockowska M, Liebhart J, Blizanowska A, Liebhart E, Baran E, Barancewicz-Losek M. [Contact dermatitis associated with bronchial hyperreactivity in workers chronically exposed to detergents]. PRZEGLAD DERMATOLOGICZNY 1984; 71:127-33. [PMID: 6237390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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English Abstract |
41 |
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Medrala W, Małolepszy J, Wolańczyk-Medrala A, Wrzyszcz M, Liebhart E, Kraus-Filarska M, Dobek R. Is mast cell activation during asthmatic reaction reflected in the circulation? J Investig Allergol Clin Immunol 1995; 5:343-6. [PMID: 8653223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Allergic asthmatic patients were challenged with specific allergen that resulted in early asthmatic reaction (EAR). Serum tryptase concentration (STC) and neutrophil chemotactic activity (NCA) were measured before and during EAR. A significant increase in neutrophil chemotactic activity was noticed in the 60th min, without an accompanying increase in serum tryptase concentration. The rise in neutrophil chemotactic activity in our study confirms previous observations in this field. However, because of the numerous cellular sources for neutrophil chemotactic activity, it does not seem to be a gold standard for measurement of mast cell activation. Undetectable levels of serum tryptase concentration during EAR in our study do not exclude the role of the mast cell in its pathogenesis. To our knowledge, only massive mast cell degranulation is reflected in the circulation as an increased tryptase concentration. In the case of upper respiratory allergic reactions, mast cell degranulation definitely takes place, but does not result in evident changes in serum tryptase concentration. We conclude that mast cell activation during allergen-induced EAR is poorly represented in the circulation.
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Chachaj W, Jaśkiewicz A, Liebhart E, Liebhart J, Małolepszy J, Moroń K, Tuszewski F. [Comparison of the results of radioplanimetric, spirometric and gasometric tests in chronic obstructive lung disease]. PNEUMONOLOGIA POLSKA 1980; 48:437-43. [PMID: 6776498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Comparative Study |
45 |
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Liebhart J, Małolepszy J, Liebhart E, Bartkowiak A, Machaj Z, Panaszek B, Patkowski J, Dec J. [Automatic assistance in the diagnosis of chronic nonspecific lung diseases and bronchial asthma. II. Process of automatic differentiation of diseases with classical methods of discriminative analysis using variables of a quantitative character]. PNEUMONOLOGIA POLSKA 1983; 51:409-14. [PMID: 6647048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Comparative Study |
42 |
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15
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Krasnowska M, Liebhart E, Małolepszy J. [Effect of lidocaine on histamine-induced bronchial spasm]. PNEUMONOLOGIA POLSKA 1983; 51:613-6. [PMID: 6669484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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English Abstract |
42 |
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16
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Krasnowska M, Liebhart E, Małolepszy J. [Nonspecific bronchial hyperreactivity after long-term use of a beta 2 agonist]. PNEUMONOLOGIA POLSKA 1988; 56:501-6. [PMID: 3252190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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English Abstract |
37 |
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Schuchter K, Wald N, Hackshaw AK, Hafner E, Liebhart E. The distribution of nuchal translucency at 10-13 weeks of pregnancy. Prenat Diagn 1998; 18:281-6. [PMID: 9556045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
There is a need for a simple method of expressing nuchal translucency measurement in early pregnancy that will allow for gestational age and be useful in screening for Down's syndrome. To achieve this objective, we conducted a prospective study of 561 women with singleton pregnancies that were not affected by Down's syndrome at 10-13 weeks of gestation. Nuchal translucency measurements and crown rump length measurements were determined. Nuchal translucency measurement increased by about 17 per cent per week. Expressing the result as a multiple of the median (MOM) nuchal translucency for a given crown rump length allowed for this increase with gestational age and yielded a distribution of values that was approximately Gaussian. About 96 per cent of values lay between 0.5 and 2.0 MOM. The variance and therefore the false-positive rate of nuchal translucency were significantly reduced by recording several measurements and using the average: for example, the false-positive rate reduced from 8.3 per cent to 5.0 per cent if the average of six measurements were used instead of one--a potential 40 per cent reduction in the false-positive rate if the test were used in screening. Estimating the distribution of nuchal translucency in MOM values will assist in specifying the statistical parameters to be used in prenatal screening for Down's syndrome and the use of repeated nuchal translucency measurements is expected to have a useful effect on reducing the screening false-positive rate at a given MOM cut-off level.
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Kuźniar T, Patkowski J, Liebhart J, Wytrychowski K, Dobek R, Slusarz R, Liebhart E, Małolepszy J. [Validation of the Polish version of St. George's respiratory questionnaire in patients with bronchial asthma]. PNEUMONOLOGIA I ALERGOLOGIA POLSKA 2001; 67:497-503. [PMID: 11057099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
St George's Respiratory Questionnaire (SGRQ) has been widely used in the assessment of health related quality of life (HRQOL) in patients with asthma and chronic obstructive pulmonary disease. Introduction of the new language version of the HRQOL questionnaire needs to be preceded by a highly structured process of validation. We aimed to validate the Polish version of SGRQ in the group of 83 patients with asthma. Following the comprehension study, we thus evaluated reliability, validity, reproducibility, responsiveness, and measurement equivalence of the Polish version of SGRQ. Disease severity and health status were also concurrently assessed. The reliability was good, with Cronbach's alpha coefficient exceeding 0.75 for global and all subscale scores. There have been highly significant correlations between spirometric parameters, intensity of symptoms, health status self-assessment, and the degree of depression, and quality of life scores. Reproducibility, stability and responsiveness were confirmed in the follow-up study. Minimal clinically important difference was found to be 5.3 points. Polish version of SGRQ was found to be psychometrically equivalent to four other versions of SGRQ, which underscores its validity in the population of Polish asthmatics.
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Validation Study |
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Liebhart E, Suchnicka R, Krasnowska M. [Protective effect of adrenergic alpha blockaders on posthistamine bronchial spasm]. PNEUMONOLOGIA POLSKA 1981; 49:769-74. [PMID: 6123109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Comparative Study |
44 |
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Małolepszy J, Kraus-Filarska M, Szeliga W, Liebhart E. [Effect of desensitization treatment with Pollinex on the T- and B-lymphocyte subpopulations in hay fever]. POLSKIE ARCHIWUM MEDYCYNY WEWNETRZNEJ 1981; 66:197-200. [PMID: 6976564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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English Abstract |
44 |
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Liebhart J, Medrala W, Gladysz U, Barg W, Liebhart E, Dobek R, Dor A, Kulczak A, Gogolewski G, Bigda A, Panaszek B. Production of leukotriene C4 by peripheral blood leukocytes stimulated with anti-fcepsilonRI antibody, PMA, and fMLP does not correlate with irreversible airway obstruction in asthmatics. J Investig Allergol Clin Immunol 2007; 17:1-5. [PMID: 17323856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023] Open
Abstract
BACKGROUND Airway remodeling has recently emerged as a major problem in an increasing percentage of patients with asthma. Reasons for great diversity in the progression of irreversible bronchoconstriction among asthmatics remain unclear. OBJECTIVE The aim of this study was to assess whether the potential ability of leukocytes to produce cysteinyl leukotrienes in response to various stimuli is correlated with magnitude of irreversible airway obstruction in asthmatics. MATERIALS AND METHODS The study sample comprised 76 asthmatics (34 males, mean +/- SD age 52 +/- 13 years), and 35 healthy controls (18 males, 38.2 +/- 15 years). Each subject underwent 2 pulmonary function tests: before and after bronchodilator administration. In addition, approximate annual decline in forced expiratory volume in 1 second (FEV1) (% of predicted) was calculated. Leukotriene C4 (LTC4) production was assessed combining a cellular antigen stimulation test and enzyme-linked immunosorbent assay using Bulhmann Laboratories AG kits. Leukocytes isolated from peripheral blood were stimulated with anti-FcepsilonRI antibody, N-formyl-methionyl-leucyl-phenylalanine (fMLP) and phorbol 12-myristate 13-acetate (PMA). In separate tubes each subject's leukocytes were tested for spontaneous LTC4 production. Finally, stimulated LTC4 production was expressed in pg/mL after subtraction of values of spontaneous production. RESULTS In asthmatics, baseline FVC% and FEV% values ranged from 24.4% to 122.4% (mean, 75.5%) and from 23.4% to 126.6% (mean, 74.4%), respectively. There were no significant differences between asthmatics and controls in LTC4 production stimulated by anti-FcepsilonRI antibody (P = .79), fMLP (P = .33) or PMA (P = .86). We found no correlation between stimulated LTC4 production and spirometric parameters at baseline or after bronchodilator administration or annual decline in FEV1%. CONCLUSION Our results do not confirm the hypothesis that airway remodeling in asthma might be related to enhanced ability of leukocytes to produce cysteinyl leukotrienes in response to various stimuli.
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Liebhart E. [Inhalation provocation tests in the diagnosis of bronchial asthma]. POLSKI TYGODNIK LEKARSKI (WARSAW, POLAND : 1960) 1982; 37:773-6. [PMID: 6755408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Comparative Study |
43 |
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Kraus-Filarska M, Małolepszy J, Liebhart E, Panaszek B, Stankiewicz M, Czaplicka H, Walkiewicz E, Rzuidło Z. [Comparative studies of inhalation and skin provocation tests using bacterial allergens in patients with infectious bronchial asthma]. PNEUMONOLOGIA POLSKA 1986; 54:491-6. [PMID: 3588326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Comparative Study |
39 |
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Wrzyszcz M, Małolepszy J, Krasnowska M, Liebhart E, Medrala W, Kopeć W. [Circulating immune complexes in patients treated with Pollinex vaccine]. POLSKI TYGODNIK LEKARSKI (WARSAW, POLAND : 1960) 1990; 45:737-9. [PMID: 2128120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Twenty six patients with rhinitis were desensitized with Pollinex. Circulating immune complexes were determined in these patients before and after immunotherapy. Two assay techniques - precipitation and PEG-CCT were applied to assay circulating immune complexes. It was found that specific immunotherapy with Pollinex does not produce circulating immune complexes in patients with hay fever.
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English Abstract |
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Illigmann A, Vielberg MT, Lakemeyer M, Wolf F, Dema T, Stange P, Kuttenlochner W, Liebhart E, Kulik A, Staudt ND, Malik I, Grond S, Sieber SA, Kaysser L, Groll M, Brötz-Oesterhelt H. Structure of Staphylococcus aureus ClpP Bound to the Covalent Active-Site Inhibitor Cystargolide A. Angew Chem Int Ed Engl 2024; 63:e202314028. [PMID: 38029352 DOI: 10.1002/anie.202314028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/01/2023]
Abstract
The caseinolytic protease is a highly conserved serine protease, crucial to prokaryotic and eukaryotic protein homeostasis, and a promising antibacterial and anticancer drug target. Herein, we describe the potent cystargolides as the first natural β-lactone inhibitors of the proteolytic core ClpP. Based on the discovery of two clpP genes next to the cystargolide biosynthetic gene cluster in Kitasatospora cystarginea, we explored ClpP as a potential cystargolide target. We show the inhibition of Staphylococcus aureus ClpP by cystargolide A and B by different biochemical methods in vitro. Synthesis of semisynthetic derivatives and probes with improved cell penetration allowed us to confirm ClpP as a specific target in S. aureus cells and to demonstrate the anti-virulence activity of this natural product class. Crystal structures show cystargolide A covalently bound to all 14 active sites of ClpP from S. aureus, Aquifex aeolicus, and Photorhabdus laumondii, and reveal the molecular mechanism of ClpP inhibition by β-lactones, the predominant class of ClpP inhibitors.
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