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Fodelianakis S, Antoniou E, Mapelli F, Magagnini M, Nikolopoulou M, Marasco R, Barbato M, Tsiola A, Tsikopoulou I, Giaccaglia L, Mahjoubi M, Jaouani A, Amer R, Hussein E, Al-Horani FA, Benzha F, Blaghen M, Malkawi HI, Abdel-Fattah Y, Cherif A, Daffonchio D, Kalogerakis N. Allochthonous bioaugmentation in ex situ treatment of crude oil-polluted sediments in the presence of an effective degrading indigenous microbiome. J Hazard Mater 2015; 287:78-86. [PMID: 25621834 DOI: 10.1016/j.jhazmat.2015.01.038] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 12/12/2014] [Accepted: 01/13/2015] [Indexed: 06/04/2023]
Abstract
Oil-polluted sediment bioremediation depends on both physicochemical and biological parameters, but the effect of the latter cannot be evaluated without the optimization of the former. We aimed in optimizing the physicochemical parameters related to biodegradation by applying an ex-situ landfarming set-up combined with biostimulation to oil-polluted sediment, in order to determine the added effect of bioaugmentation by four allochthonous oil-degrading bacterial consortia in relation to the degradation efficiency of the indigenous community. We monitored hydrocarbon degradation, sediment ecotoxicity and hydrolytic activity, bacterial population sizes and bacterial community dynamics, characterizing the dominant taxa through time and at each treatment. We observed no significant differences in total degradation, but increased ecotoxicity between the different treatments receiving both biostimulation and bioaugmentation and the biostimulated-only control. Moreover, the added allochthonous bacteria quickly perished and were rarely detected, their addition inducing minimal shifts in community structure although it altered the distribution of the residual hydrocarbons in two treatments. Therefore, we concluded that biodegradation was mostly performed by the autochthonous populations while bioaugmentation, in contrast to biostimulation, did not enhance the remediation process. Our results indicate that when environmental conditions are optimized, the indigenous microbiome at a polluted site will likely outperform any allochthonous consortium.
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Affiliation(s)
- S Fodelianakis
- School of Environmental Engineering, Technical University of Crete, Chania, Greece; King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - E Antoniou
- School of Environmental Engineering, Technical University of Crete, Chania, Greece
| | - F Mapelli
- Department of Food, Environment and Nutritional Sciences, University of Milan, Italy
| | | | - M Nikolopoulou
- School of Environmental Engineering, Technical University of Crete, Chania, Greece
| | - R Marasco
- King Abdullah University of Science and Technology, Thuwal, Saudi Arabia; Department of Food, Environment and Nutritional Sciences, University of Milan, Italy
| | - M Barbato
- Department of Food, Environment and Nutritional Sciences, University of Milan, Italy
| | - A Tsiola
- Hellenic Center for Marine Research, Heraklion, Crete, Greece
| | - I Tsikopoulou
- Hellenic Center for Marine Research, Heraklion, Crete, Greece; Department of Biology, University of Crete,Heraklion, Crete, Greece
| | | | - M Mahjoubi
- LR11-ES31 Biotechnology and Bio-Geo Resources Valorization, Higher Institute for Biotechnology, Biotechpole SidiThabet, University of Manouba, 2020 Ariana, Tunisia
| | - A Jaouani
- Laboratory of Microorganisms and Active Biomolecules, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 Tunis, Tunisia
| | - R Amer
- Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Technology Applications (SRTA-City), Alexandria, Egypt
| | - E Hussein
- Department of Biological Sciences, Yarmouk University, 211-63 Irbid, Jordan
| | - F A Al-Horani
- Faculty of Marine Sciences, The University of Jordan-Aqaba, 7110 Aqaba, Jordan
| | - F Benzha
- Laboratory of Microbiolgy, Biotechnology and Environmrent, University Hassan II Casablanca, Faculty of Sciences aîn-chock, B.P. 5366 Morocco
| | - M Blaghen
- Laboratory of Microbiolgy, Biotechnology and Environmrent, University Hassan II Casablanca, Faculty of Sciences aîn-chock, B.P. 5366 Morocco
| | - H I Malkawi
- Department of Biological Sciences, Yarmouk University, 211-63 Irbid, Jordan; Hamdan Bin Mohammed Smart University, Academic City, Dubai, United Arab Emirates
| | - Y Abdel-Fattah
- Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Technology Applications (SRTA-City), Alexandria, Egypt
| | - A Cherif
- LR11-ES31 Biotechnology and Bio-Geo Resources Valorization, Higher Institute for Biotechnology, Biotechpole SidiThabet, University of Manouba, 2020 Ariana, Tunisia; Laboratory of Microorganisms and Active Biomolecules, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 Tunis, Tunisia
| | - D Daffonchio
- King Abdullah University of Science and Technology, Thuwal, Saudi Arabia; Department of Food, Environment and Nutritional Sciences, University of Milan, Italy
| | - N Kalogerakis
- School of Environmental Engineering, Technical University of Crete, Chania, Greece.
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Orlando G, Luppino IM, Gervasi R, Lerose MA, Amato B, Spagnuolo R, Marasco R, Doldo P, Puzziello A. Surgery for a gastric Dieulafoy's lesion reveals an occult bleeding jejunal diverticulum. A case report. BMC Surg 2012; 12 Suppl 1:S29. [PMID: 23173883 PMCID: PMC3499193 DOI: 10.1186/1471-2482-12-s1-s29] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 12/11/2022] Open
Abstract
Background Jejunal diverticulosis is an uncommon disease and usually asymptomatic. It can be complicated not only by diverticulitis, but by hemorrhage, perforation, intussusception, volvulus, malabsorption and even small bowel obstruction due to enteroliths formed and expelled from these diverticula. Methods We describe a case of an occult bleeding jejunal diverticulum, casually discovered in a patient that was taken to surgery for a Dieulafoy’s lesion after unsuccessful endoscopic treatment. We performed a gastric resection together with an ileocecal resection. Macroscopic and microscopic examinations confirmed the gastric Dieulafoy’s lesion and demonstrated the presence of another source of occult bleeding in asymptomatic jejunal diverticulum. Discussion The current case emphasizes that some gastrointestinal bleeding lesions, although rare, can be multiple and result in potentially life-threatening bleeding. The clinician must be mindful to the possibility of multisite lesions and to the correlation between results of the investigations and clinical condition of the bleeding patient.
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Affiliation(s)
- G Orlando
- Gastroenterology and Endoscopy Unit, T Campanella Oncological Foundation, Catanzaro, Italy
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Causin F, Pascarella R, Pavesi G, Marasco R, Zambon G, Battaglia R, Munari M. Acute endovascular treatment (< 48 hours) of uncoilable ruptured aneurysms at non-branching sites using silk flow-diverting devices. Interv Neuroradiol 2011; 17:357-64. [PMID: 22005700 DOI: 10.1177/159101991101700313] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Accepted: 04/24/2011] [Indexed: 12/21/2022] Open
Abstract
A blood blister-like (BBL) or dissecting aneurysm should be carefully considered if located at a non-branching site of the supra-clinoid internal carotid artery (ICA). Several surgical and endovascular treatment methods have been proposed but they all carry a relatively high risk of morbidity and mortality. This study evaluated the effectiveness of a novel Silk flow-diverting device (SFD) placed in the early acute stage. Three patients presenting with acute subarachnoid haemorrhage caused by small blister-like aneurysms of the carotid siphon were treated within 48 hours after admission by placement of SFDs. More than one device was placed to cover the lesion. None of the patients were premedicated and started anti-platelet therapy during the procedure. All aneurysms were successfully occluded. A good outcome was observed in two out of three treated patients. No thromboembolic or haemorrhagic event occurred during or after the procedures, or during follow-up (6-14 months). SFD prevented rebleeding and the use of these devices could be proposed as an option to treat fragile uncoilable BBL aneurysms, even in the early acute phase without anti-platelet premedication. Larger studies and long-terms results are necessary.
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Affiliation(s)
- F Causin
- Neurosurgery Department, Padua University Hospital, Padua, Italy.
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Marasco R, Spagnoli M, Leonardi M. Association between Developmental Venous Anomalies and Cavernous Angiomas: a Retrospective MR Study. Neuroradiol J 2009; 22:179-85. [PMID: 24207037 DOI: 10.1177/197140090902200207] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Accepted: 04/24/2009] [Indexed: 11/16/2022] Open
Abstract
Developmental venous anomalies (DVA) are large veins usually arranged in a cluster around a collector vein draining directly into the superficial and deep venous systems. Since the introduction of magnetic resonance imaging DVA have been disclosed more frequently. Many studies suggested and then confirmed the association between cavernous angioma and developmental venous anomaly, described for the first time by Roberson in 1974. The aim of our study was a retrospective assessment of the case series at our institution, namely to determine the frequency of the association between developmental venous anomaly and cavernous and analyse the relation between the two lesions.
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Affiliation(s)
- R Marasco
- Neuroradiology Department, University of Bologna, Bellaria Hospital; Bologna, Italy -
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Leonardi M, Dall'olio M, Raffi L, Cenni P, Simonetti L, Marasco R, Giagnorio F. Carotid Stenting without Angioplasty and without Protection: The Advantages of a Less Invasive Procedure. Interv Neuroradiol 2008; 14:153-63. [PMID: 20557756 DOI: 10.1177/159101990801400206] [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] [Received: 03/14/2008] [Accepted: 05/30/2008] [Indexed: 11/15/2022] Open
Abstract
SUMMARY Endovascular stenting is a consolidated alternative to thrombendarterectomy in the treatment of extracranial carotid artery atheromasic stenosis. The most common complication of stenting is a distal embolism causing clinically silent orsymptomatic cerebral ischaemia. To prevent this complication distal embolism protection devices are often used but their effectiveness remains unsettled. In addition, there is some evidence that distal embolism may actually be triggered by the protection systems due to clot formationat their distal surface or in the intimal lesions these systems cause. Another rarer complicationis hyperperfusion syndrome arising during both stenting and thrombendarterectomy but more common in endovascular procedures. To avoid these complications the Neuroradiology Service at Bellaria Hospital (Bologna Local Health Trust) has devised a mini-invasive carotid stenting technique that does not require either distal embolism protection or angioplasty. The technique uses only the radial force exerted by the self-expanding stent to widen the atherosclerotic stenosis slowly and gradually. The goal of treatment has also changed from a prompt restoration of the atheromasic vessel's original calibre to slow transformation of the hemodynamic significance of the stenosis. The technique's success lies mainly in selecting the stenosis to treat using CT angiography to analyse plaque morphology and structure.We used the technique to treat 83 stenotic lesions in 75 patients. The study aims to describe and discussour experience.
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Affiliation(s)
- M Leonardi
- Neuroradiology Department, Bellaria Hospital; Bologna, Italy -
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Bartalena T, Pascali E, Rinaldi MF, Marasco R, Bassi F, Alboni C, Gavelli G. Transmigrated intrauterine device discovered 17 years after its insertion. ACTA ACUST UNITED AC 2007; 51 Suppl:B284-6. [DOI: 10.1111/j.1440-1673.2007.01760.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Muscariello L, Marasco R, De Felice M, Sacco M. The functional ccpA gene is required for carbon catabolite repression in Lactobacillus plantarum. Appl Environ Microbiol 2001; 67:2903-7. [PMID: 11425700 PMCID: PMC92959 DOI: 10.1128/aem.67.7.2903-2907.2001] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [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] Open
Abstract
We report the characterization of the ccpA gene of Lactobacillus plantarum, coding for catabolite control protein A. The gene is linked to the pepQ gene, encoding a proline peptidase, in the order ccpA-pepQ, with the two genes transcribed in tandem from the same strand as distinct transcriptional units. Two ccpA transcription start sites corresponding to two functional promoters were found, expression from the upstream promoter being autogenously regulated through a catabolite-responsive element (cre) sequence overlapping the upstream +1 site. During growth on ribose, the upstream promoter showed maximal expression, while growth on glucose led to transcription from the downstream promoter. In a ccpA mutant strain, the gene was transcribed mainly from the upstream promoter in both repressing and non repressing conditions. Expression of two enzyme activities, beta-glucosidase and beta-galactosidase, was relieved from carbon catabolite repression in the ccpA mutant strain. In vivo footprinting analysis of the catabolite-controlled bglH gene regulatory region in the ccpA mutant strain showed loss of protection of the cre under repressing conditions.
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Affiliation(s)
- L Muscariello
- Istituto Internazionale di Genetica e Biofisica, Consiglio Nazionale delle Ricerche, 80125 Naples, Italy
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Marasco R, Salatiello I, De Felice M, Sacco M. A physical and functional analysis of the newly-identified bglGPT operon of Lactobacillus plantarum. FEMS Microbiol Lett 2000; 186:269-73. [PMID: 10802183 DOI: 10.1111/j.1574-6968.2000.tb09116.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [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: 11/26/2022] Open
Abstract
A newly-identified bglGPT operon of Lactobacillus plantarum was isolated and expressed in Escherichia coli. The sequence analysis of the cloned DNA fragment showed three open reading frames encoding (i) a 237-amino acid protein (BglG), (ii) a 577-amino acid protein (BglP) and (iii) a 486-amino acid protein (BglT). BglG, BglP and BglT were shown to be homologous to the BglG family of transcriptional antiterminators, to permeases of the phosphoenolpyruvate-dependent phosphotransferase system and to beta-glucosidases, respectively. Complementation of E. coli mutant strains showed that BglP and BglT are a permease and a beta-glucosidase active on the beta-glucosides, 5-bromo-4-chloro-3-indolyl-beta-D-glucopyranoside and p-nitrophenyl-beta-D-glucoside, respectively. BglG was also shown to promote expression of a bglG-lacZ gene fusion in an E. coli bglG(-) background. A ribonucleic antiterminator sequence, the antiterminator-responsive cis-element and a 'catabolite responsive element', were found downstream of the transcriptional start point. Transcription of the operon was repressed 10-fold in L. plantarum cells grown on glucose as compared to ribose.
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Affiliation(s)
- R Marasco
- Facoltà di Scienze MM, FF e NN, Università degli Studi del Sannio, via Caio Ponzio Telesino 11, 82100, Benevento, Italy
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Biancone L, Monteleone G, Marasco R, Pallone F. Autoimmunity to tropomyosin isoforms in ulcerative colitis (UC) patients and unaffected relatives. Clin Exp Immunol 1998; 113:198-205. [PMID: 9717968 PMCID: PMC1905040 DOI: 10.1046/j.1365-2249.1998.00610.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/02/1998] [Indexed: 12/17/2022] Open
Abstract
Autoimmunity to cytoskeletal protein tropomyosin (TM) has been demonstrated in UC. However, the TM isoforms involved in this IgG-mediated autoimmune response in UC and the possible presence of serum IgG antibodies against TM (hTMs IgG) in unaffected UC relatives are unknown. The aim of this study was to investigate the human TM (hTM) isoforms recognized by serum IgG from UC and to explore whether hTM IgG antibodies are present in healthy UC relatives. We studied 33 UC patients with 58 unaffected relatives, 31 Crohn's disease (CD) patients with 31 unaffected relatives and 20 controls (C). Serum IgG against four recombinant hTM isoforms (hTM1, 2, 3, 5) were tested by ELISA. p-ANCA were tested by ELISA and immunofluorescence. Serum hTM1 and hTM5 IgG were higher in UC patients than in CD and C (P<0.005). Among UC patients 52% were seropositive for hTM1 and 64% for hTM5 (P<0.001 versus CD and C). In UC, hTM5 IgG were higher in p-ANCA+ than in ANCA- patients (P=0.04). In UC relatives hTM1 IgG were higher than in CD relatives and C (P<0.01). UC relatives were more frequently seropositive for hTM1 than hTM5 IgG (P=0.001). while probands were more frequently seropositive for hTM5 IgG (P=0.008). We conclude that autoimmunity to hTMI and hTM5 is a feature of UC, while hTM1 IgG differentiate UC relatives from controls. A genetic susceptibility to immune recognition of hTM isoforms in UC is suggested.
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Affiliation(s)
- L Biancone
- Clinica Medica 2, Università La Sapienza, Roma, Italy
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Marasco R, Muscariello L, Varcamonti M, De Felice M, Sacco M. Expression of the bglH gene of Lactobacillus plantarum is controlled by carbon catabolite repression. J Bacteriol 1998; 180:3400-4. [PMID: 9642194 PMCID: PMC107296 DOI: 10.1128/jb.180.13.3400-3404.1998] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [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: 02/07/2023] Open
Abstract
A newly identified bglH gene coding for a phospho-beta-glucosidase of Lactobacillus plantarum was isolated and expressed in Escherichia coli. The sequence analysis of the cloned DNA fragment showed an open reading frame encoding a 480-amino-acid protein with a calculated molecular mass of 53 kDa. The bglH gene was shown to be expressed on a monocistronic transcriptional unit. Its transcription was repressed 10-fold in L. plantarum cells grown on glucose compared to the beta-glucoside salicin as a sole carbon source. A catabolite-responsive element (CRE) spanning from -3 to +11 with respect to the transcriptional start point was found, and its functionality was assessed by mutational analysis. In vitro and in vivo DNA binding experiments suggested the occurrence of a DNA-protein complex at the CRE site, which would mediate glucose repression of bglH expression.
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Affiliation(s)
- R Marasco
- Dipartimento di Chimica, Università degli Studi di Salerno, Italy
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11
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Luzza F, Imeneo M, Maletta M, Graziano P, Marasco R, Monteleone G, Caradonna M, Pallone F. Evaluation of a commercial serological kit for detection of salivary immunoglobulin G to Helicobacter pylori. Eur J Clin Microbiol Infect Dis 1997; 16:775-7. [PMID: 9405955 DOI: 10.1007/bf01709266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Monteleone G, Biancone L, Marasco R, Morrone G, Marasco O, Luzza F, Pallone F. Interleukin 12 is expressed and actively released by Crohn's disease intestinal lamina propria mononuclear cells. Gastroenterology 1997; 112:1169-78. [PMID: 9098000 DOI: 10.1016/s0016-5085(97)70128-8] [Citation(s) in RCA: 386] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND & AIMS Cell-mediated immunity is a feature of Crohn's disease (CD). The heterodimer interleukin (IL)-12, produced by phagocytes, induces T-cell cytokines, primarily interferon (IFN)-gamma. This study examined whether CD lamina propria mononuclear cells (LPMCs) express and release bioactive IL-12. METHODS LPMCs were isolated from 13 patients with CD, 9 with ulcerative colitis (UC), and 13 controls. Messenger RNA for p40 and p35 IL-12 subunits was evaluated by reverse-transcription polymerase chain reaction. IL-12 was measured by enzyme-linked immunosorbent assay in LPMC culture supernatants. The INF-gamma-inducing effect of unstimulated LPMC supernatants was evaluated. RESULTS Messenger RNA for both IL-12 subunits was detected in LPMCs of 11 of 13 patients with CD, 1 of 9 patients with UC, and 1 of 13 controls (P < 0.001). IL-12 was measured (10.5 +/- 2 pg/mL at 24 hours) in unstimulated CD LPMCs and was enhanced by pokeweed mitogen, lipopolysaccharide, and staphylococcal enterotoxin B. No IL-12 was detectable in 8 of 9 patients with UC and 12 of 13 control-unstimulated LPMCs. IL-12 induced by pokeweed mitogen and staphylococcal enterotoxin B in UC was lower than in CD and did not differ from controls. An IFN-gamma-inducing effect was restricted to unstimulated CD LPMC supernatants and was inhibited by an anti-IL-12 antibody in a dose-dependent fashion. CONCLUSIONS IL-12 transcripts are expressed in CD intestinal tissues. CD LPMCs are up-regulated in their capability of releasing bioactive IL-12. Expression and release of bioactive IL-12 seem to differentiate CD from UC.
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Affiliation(s)
- G Monteleone
- Dipartimento di Medicina Sperimentale e Clinica, Università di Reggio Calabria, Catanzaro, Italy
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Abstract
We report the cloning of a 2-kb PstI-BamHI fragment of Bacillus subtilis DNA carrying an open reading frame of 1398 bp, herein designated orfRM1. This orf was shown to be transcribed only during vegetative growth from a putative sigma A-specific promoter. The deduced amino acid sequence predicted a polypeptide of 51 kDa (466 aa), which shows significant percentage of identity with the Escherichia coli Prc protein. However no Prc-like phenotypes were observed in a B. subtilis orfRM1 deletion-insertion mutant.
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Affiliation(s)
- R Marasco
- Dipartimento di Chimica, Università degli Studi di Salerno, Fisciano, (SA) Italy
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14
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Luzza F, Maletta M, Imeneo M, Monteleone G, Marasco R, Biancone L, Pallone F. Evidence against colonic mucosa colonisation by Helicobacter pylori. Lack of a specific antibody response in homogenates of rectal endoscopic biopsies. Ital J Gastroenterol 1996; 28:447-51. [PMID: 9032587] [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: 02/03/2023]
Abstract
Aim of this study is to provide indirect evidence that human colonic mucosa harbour Helicobacter pylori. The antibody response of IgG and IgA class against Helicobacter pylori was examined in autologous homogenate of gastric and rectal endoscopic biopsies from 26 patients and in rectal samples of a further 36. All had a documented (histology and/or serology) Helicobacter pylori status. Helicobacter pylori specific IgG and IgA were measured by an in-house ELISA. In Helicobacter pylori positive patients having both gastric and rectal homogenate, mean level of Helicobacter pylori IgG and IgA was higher in gastric than in rectal samples (0.810 +/- 0.668 optical density vs 0.329 +/- 0.509 optical density for IgG, p = 0.007 and 0.660 +/- 0.477 vs 0.116 +/- 0.229 for IgA, p < 0.001, respectively). In each patient, level of the two isotypes was clearly higher in gastric than in autologous rectal sample. In the overall study population, mean level of Helicobacter pylori IgG in rectal homogenate was not significantly (p = 0.16) different between Helicobacter pylori positive (48/62, 77%, 0.243 +/- 0.388 optical density) and negative (14/62, 23%; 0.095 +/- 0.088) patients. In same material, levels of Helicobacter pylori IgA were very low and undetectable either in Helicobacter pylori positive or negative patients. Although Helicobacter pylori IgG are detectable in rectal homogenates of Helicobacter pylori positive patients, present data suggest that these antibodies may not be local in origin but rather reflect circulating response. These observations do not support the view that large bowel mucosa is colonised by Helicobacter pylori.
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Affiliation(s)
- F Luzza
- Dipartimento de Medicina Sperimentale, Unversità di Reggio Calabria, Catanzaro, Italy
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15
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Baccigalupi L, Marasco R, Ricca E, De Felice M, Sacco M. Control of ilvIH transcription during amino acid downshift in stringent and relaxed strains of Escherichia coli. FEMS Microbiol Lett 1995; 131:95-8. [PMID: 7557316 DOI: 10.1111/j.1574-6968.1995.tb07760.x] [Citation(s) in RCA: 4] [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: 01/25/2023] Open
Abstract
Transcription of the ilvIH operon was reduced during amino acid starvation of wild-type Escherichia coli. The effect was abolished by a relA mutation and was enhanced by a spoT mutation, thus suggesting a possible negative role of ppGpp accumulation on ilvIH transcription. No effect of amino acid downshift was observed on the synthesis of lrp mRNA, encoding the positive regulator (Lrp) of ilvIH transcription.
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Affiliation(s)
- L Baccigalupi
- Istituto di Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche, Avellino, Italy
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Abstract
Agrobacterium tumefaciens strain C58 was able to utilize carbon from cellobiose and some other beta-D-glucosides as efficiently as from glucose. beta-D-glucoside utilization was partially inducible and the induction was subject to catabolite repression by glucose, independently of the presence of cyclic AMP in the medium. It was also independent of Ti plasmid-encoded functions. beta-D-glucosides were hydrolysed by a single, cytoplasmic and constitutively expressed beta-glucosidase, which was active on non-phosphorylated substrates and insensitive to glucose inhibition.
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Affiliation(s)
- R Marasco
- Dipartimento di Fisiologia Generale ed Ambientale, Naples, Italy
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Luzza F, Maletta M, Imeneo M, Doldo P, Marasco R, Biancone L, Pallone F. Salivary specific IgG is a sensitive indicator of the humoral immune response to Helicobacter pylori. FEMS Immunol Med Microbiol 1995; 10:281-3. [PMID: 7773244 DOI: 10.1111/j.1574-695x.1995.tb00044.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
In humans, salivary antibodies are secreted during humoral immune response. Helicobacter pylori infection is associated with systemic humoral immune response reflected by raised serum levels of specific IgG. The present study was aimed at exploring whether salivary concentrations of specific H. pylori IgG are a reliable indicator of H. pylori infection. Serum and salivary samples were obtained from 291 subjects attending the GI clinic and tested for H. pylori-specific IgG by a direct ELISA (94% sensitivity, 95% specificity for serum determinations) using a crude H. pylori sonicate as antigen. Data are given as optical density (mean +/- S.D.). Levels of salivary H. pylori IgG paralleled those of circulating specific IgG in the 291 subjects studied (0.981 +/- 0.431 vs. 0.777 +/- 0.682, respectively). A significant positive correlation was found between specific H. pylori IgG in sera and saliva samples (r = 0.981, P < 0.0001). An overall concordance between circulating and salivary H. pylori IgG was observed in 238 out of the 291 (81.7%) subjects. Salivary H. pylori IgG represent a sensitive marker of specific humoral immune response and they may substitute circulating H. pylori IgG measurement when sera samples are not available.
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Affiliation(s)
- F Luzza
- Dipartimento di Medicina Sperimentale, Università di Reggio Calabria, Catanzaro, Italy
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Marasco R, Varcamonti M, La Cara F, Ricca E, De Felice M, Sacco M. In vivo footprinting analysis of Lrp binding to the ilvIH promoter region of Escherichia coli. J Bacteriol 1994; 176:5197-201. [PMID: 8071194 PMCID: PMC196701 DOI: 10.1128/jb.176.17.5197-5201.1994] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [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: 01/28/2023] Open
Abstract
An in vivo footprinting analysis of the ilvIH regulatory region of Escherichia coli showed that the transcription activator Lrp binds to six sites, scattered over 250 bp upstream of the transcriptional start point. When Lrp-mediated activation was impaired by the presence of exogenous leucine, only one promoter-distal site (site 2) was partially protected by Lrp binding. Equilibrium dialysis experiments showed the formation of an Lrp-leucine complex in vitro. These results suggest that leucine negatively affects ilvIH transcription because its interaction with Lrp reduces the efficiency of binding of the regulatory protein to the promoter region.
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Affiliation(s)
- R Marasco
- Dipartimento di Fisiologia Generale ed Ambientale, Università Federico II, Naples, Italy
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Sacco M, Ricca E, Marasco R, Paradiso R, De Felice M. A stereospecific alignment between the promoter and the cis-acting sequence is required for Lrp-dependent activation of ilvIH transcription in Escherichia coli. FEMS Microbiol Lett 1993; 107:331-6. [PMID: 8472914 DOI: 10.1111/j.1574-6968.1993.tb06053.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 01/31/2023] Open
Abstract
The leucine-responsive regulatory protein (Lrp) is a DNA binding protein that affects, either positively or negatively, the expression of several E. coli genes. The ilvIH operon is positively regulated by Lrp and leucine counteracts this effect reducing 5- to 10-fold the efficiency of ilvIH transcription. An investigation of the mechanism of transcription activation of the ilvIH operon by Lrp indicated that: (i) a stereospecific alignment between the ilvIH promoter and the cis-acting sequence upstream of it is required for activation; (ii) a correct distance between the promoter and the adjacent cis-acting sequence is needed for leucine to counteract the positive role of Lrp; (iii) Lrp fails to activate transcription when the cis-acting region is placed several hundred base pairs upstream of the ilvIH promoter.
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Affiliation(s)
- M Sacco
- International Institute of Genetics and Biophysics, CNR, Naples, Italy
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20
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Campanile C, Forlani G, Basso AL, Marasco R, Ricca E, Sacco M, Ferrara L, De Felice M. Identification and characterization of the proBA operon of Streptococcus bovis. Appl Environ Microbiol 1993; 59:519-22. [PMID: 8382022 PMCID: PMC202136 DOI: 10.1128/aem.59.2.519-522.1993] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 01/30/2023] Open
Abstract
A genomic DNA library of the rumen bacterium Streptococcus bovis was constructed in Escherichia coli, and recombinant plasmids able to complement proA and proB mutations of the host were found. Southern hybridization and restriction analysis showed that a 3.5-kb fragment of S. bovis DNA contained two genes, organized in an operon and coding for enzymes functionally similar to the glutamyl phosphate reductase-glutamyl kinase enzyme complex that in E. coli catalyzes the first step of proline biosynthesis. Complementation of the E. coli mutations was observed with the fragment inserted in both orientations, which suggested that the S. bovis proBA operon was transcribed from its own promoter. Genetic and biochemical data suggested that the proline biosynthetic pathway of S. bovis is similar to the one previously characterized for E. coli.
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Affiliation(s)
- C Campanile
- Istituto Adattamento Bovini e Bufali all'Ambiente del Mezzogiorno, Consiglio Nazionale delle Ricerche, Naples, Italy
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Famiglietti B, Rossi A, Cammarano G, De Luca A, Longo C, Marasco R, Venditto A, Carbone R, Ortolani G. [Epidemiological studies of aspecific chronic bronchopneumopathies in homogenous groups of employees of the city of Naples: preliminary results]. Arch Monaldi 1975; 30:114-24. [PMID: 1225229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Famiglietti B, Talarico M, Nigro G, Imbimbo B, La Fianza F, Granata V, Marasco R, Lampitella P, Caruso E, Iliceto N, Albano V, Fidanza F. [Epidemiological studies of ischemic heart diseases in a group of employees of the city of Naples. I. General program of the research and preliminary results]. Ann Sanita Pubblica 1966; 27:939-59. [PMID: 5993991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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