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Falcone M, Preto M, Ferro I, Lavagno F, Cirigliano L, Peretti F, Plamadeala N, Timpano M, Ceruti C, Gontero P. Subtotal penectomy and perineostomy configuration in locally advanced penile cancer. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01417-3] [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: 02/12/2023]
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2
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Falcone M, Capogrosso P, Cirigliano L, Preto M, Timpano M, Peretti F, Ferro I, Plamadeala N, Schifano N, Ceruti C, Giorgio F, Bettocchi C, Cai T, Vitarelli A, Carrino M, Paradiso M, Pescatori E, Colombo F, Caraceni E, Dehò F, Palmieri A, Gontero P. Surgical and functional outcomes of penile prosthesis implantation in men with neurological conditions. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01300-3] [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: 02/12/2023]
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3
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Peretti F, Falcone M, Preto M, Timpano M, Ferro I, Plamadeala N, Cirigliano L, Gontero P. The outcomes of pics technique for the management of end-stage peyronie’s disease. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)01031-x] [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: 11/06/2022] Open
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Falcone M, Preto M, Timpano M, Ferro I, Peretti F, Cirigliano L, Plamadeala N, Gontero P. Surgical, functional and patients’ reported outcomes of adult acquired buried penis surgical management. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)01032-1] [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: 11/06/2022] Open
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5
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Falcone M, Sedigh O, Preto M, Timpano M, Ceruti C, Pizzuto G, Mangione C, Peretti F, Ferro I, Gontero P. Do we have valuable predicting factors for recurrence and cancer specific mortality after organ-sparing treatment in the management of superficial or localized penile cancer? EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)00766-7] [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: 10/20/2022] Open
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Preto M, Falcone M, Timpano M, Sedigh O, Ceruti C, Peretti F, Ferro I, Gontero P. Surgical, functional outcomes and patients’ reported outcomes of glansectomy and split thickness skin graft reconstruction for localized penile cancer. EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)00761-8] [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: 11/24/2022] Open
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7
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Falcone M, Preto M, Timpano M, Peretti F, Ferro I, Verla W, Spinoit A, Lumen N, Goedertier W, Hoebeke P, Gontero P. A multicenter cohort analysis of the surgical outcomes after ZSI 475 ftm erectile deviceimplantation in transmen. EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)00768-0] [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: 11/16/2022] Open
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8
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Timpano M, Falcone M, Preto M, De Rooij F, Pigot G, Lumen N, Verla W, Hoebeke P, Spinoit A, Peretti F, Ferro I, Gontero P. Surgical outcomes after treatment of urethral complications following metoidioplasty in transgender men. EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)00769-2] [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: 11/16/2022] Open
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9
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Preto M, Falcone M, Sedigh O, Timpano M, Ceruti C, Pizzuto G, Mangione C, Peretti F, Ferro I, Gontero P. Surgical outcomes of organ-sparing treatments in the management of superficial or localized penile cancer: which approach may guarantee the best oncological outcomes? EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)00767-9] [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: 10/20/2022] Open
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10
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Ferro I, Gavini J, Gallo S, Bracher L, Landolfo M, Candinas D, Stroka DM, Polacek N. The human vault RNA enhances tumorigenesis and chemoresistance through the lysosome in hepatocellular carcinoma. Autophagy 2021; 18:191-203. [PMID: 33960270 PMCID: PMC8865259 DOI: 10.1080/15548627.2021.1922983] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The small non-coding VTRNA1-1 (vault RNA 1–1) is known to confer resistance to apoptosis in several malignant cell lines and to also modulate the macroautophagic/autophagic flux in hepatocytes, thus highlighting its pro-survival role. Here we describe a new function of VTRNA1-1 in regulating in vitro and in vivo tumor cell proliferation, tumorigenesis and chemoresistance. Knockout (KO) of VTRNA1-1 in human hepatocellular carcinoma cells reduced nuclear localization of TFEB (transcription factor EB), leading to a downregulation of the coordinated lysosomal expression and regulation (CLEAR) network genes and lysosomal compartment dysfunction. We demonstrate further that impaired lysosome function due to loss of VTRNA1-1 potentiates the anticancer effect of conventional chemotherapeutic drugs. Finally, loss of VTRNA1-1 reduced drug lysosomotropism allowing higher intracellular compound availability and thereby significantly reducing tumor cell proliferation in vitro and in vivo. These findings reveal a so far unknown role of VTRNA1-1 in the intracellular catabolic compartment and describe its contribution to lysosome-mediated chemotherapy resistance. Abbreviations: ATP6V0D2: ATPase H+ transporting V0 subunit d2; BafA: bafilomycin A1; CLEAR: coordinated lysosomal expression and regulation; CQ: chloroquine; DMSO: dimethyl sulfoxide; GST-BHMT: glutathionine S-transferase N-terminal to betaine–homocysteine S-methyltransferase; HCC: hepatocellular carcinoma; LAMP1: lysosomal associated membrane protein 1; LLOMe: L-leucyl-L-leucine methyl ester; MAP1LC3B/LC3: microtubule associated protein 1 light chain 3 beta; MAPK: mitogen-activated protein kinase; MITF: melanocyte inducing transcription factor; MTT: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide; ncRNA: non-coding RNA; RNP: ribonucleoprotein; SF: sorafenib; SQSTM1/p62: sequestosome 1; STS: staurosporine; tdRs: tRNA-derived RNAs; TFE3: transcription factor binding to IGHM enhancer 3; TFEB: transcription factor EB; vtRNA: vault RNA transcript.
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Affiliation(s)
- Iolanda Ferro
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Jacopo Gavini
- Department of Visceral Surgery and Medicine, Department for BioMedical Research, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Stefano Gallo
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Lisamaria Bracher
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Marc Landolfo
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Daniel Candinas
- Department of Visceral Surgery and Medicine, Department for BioMedical Research, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Deborah M Stroka
- Department of Visceral Surgery and Medicine, Department for BioMedical Research, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Norbert Polacek
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
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Bracher L, Ferro I, Pulido-Quetglas C, Ruepp MD, Johnson R, Polacek N. Human vtRNA1-1 Levels Modulate Signaling Pathways and Regulate Apoptosis in Human Cancer Cells. Biomolecules 2020; 10:biom10040614. [PMID: 32316166 PMCID: PMC7226377 DOI: 10.3390/biom10040614] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/06/2020] [Accepted: 04/14/2020] [Indexed: 12/17/2022] Open
Abstract
Regulatory non-protein coding RNAs perform a remarkable variety of complex biological functions. Previously, we demonstrated a role of the human non-coding vault RNA1-1 (vtRNA1-1) in inhibiting intrinsic and extrinsic apoptosis in several cancer cell lines. Yet on the molecular level, the function of the vtRNA1-1 is still not fully clear. Here, we created HeLa knock-out cell lines revealing that prolonged starvation triggers elevated levels of apoptosis in the absence of vtRNA1-1 but not in vtRNA1-3 knock-out cells. Next-generation deep sequencing of the mRNome identified the PI3K/Akt pathway and the ERK1/2 MAPK cascade, two prominent signaling axes, to be misregulated in the absence of vtRNA1-1 during starvation-mediated cell death conditions. Expression of vtRNA1-1 mutants identified a short stretch of 24 nucleotides of the vtRNA1-1 central domain as being essential for successful maintenance of apoptosis resistance. This study describes a cell signaling-dependent contribution of the human vtRNA1-1 to starvation-induced programmed cell death.
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Affiliation(s)
- Lisamaria Bracher
- Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland; (L.B.); (I.F.); (M.-D.R.)
- Graduate School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland;
| | - Iolanda Ferro
- Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland; (L.B.); (I.F.); (M.-D.R.)
| | - Carlos Pulido-Quetglas
- Graduate School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland;
- Department of Medical Oncology, Inselspital, University Hospital and University of Bern, 3010 Bern, Switzerland;
- Department of BioMedical Research, University of Bern, 3008 Bern, Switzerland
| | - Marc-David Ruepp
- Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland; (L.B.); (I.F.); (M.-D.R.)
- United Kingdom Dementia Research Institute, King’s College London, Institute of Psychiatry, Psychology and Neuroscience, Maurice Wohl Clinical Neuroscience Institute, London SE5 9NU, UK
| | - Rory Johnson
- Department of Medical Oncology, Inselspital, University Hospital and University of Bern, 3010 Bern, Switzerland;
- Department of BioMedical Research, University of Bern, 3008 Bern, Switzerland
| | - Norbert Polacek
- Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland; (L.B.); (I.F.); (M.-D.R.)
- Correspondence:
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12
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Abstract
Transfer-tRNAs (tRNAs) are central entities for translation that deliver amino acids to the ribosome to translate genetic information in an mRNA-template dependent manner. Recent discoveries from our laboratory show that in E. coli and B. licheniformis, some tRNAs are poorly charged despite the plentiful intracellular cognate amino acid. Specifically, tRNAs carrying amino acids that exert toxicity and inhibit bacterial growth when added separately to the growth medium are poorly charged. Here, we discuss various evolutionary strategies different bacterial cells have adopted to precisely hone the competition between amino acid utilization for translation and proliferation and combat the inhibitory effect toward maximizing bacterial fitness. These data add a new twist to the amino acid flux models and to our understanding of the complex intimate link between dynamics of translation and bacterial growth.
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Affiliation(s)
- Iolanda Ferro
- a Institute of Biochemistry and Molecular Biology, University of Hamburg , Germany
| | - Irina Chelysheva
- a Institute of Biochemistry and Molecular Biology, University of Hamburg , Germany
| | - Zoya Ignatova
- a Institute of Biochemistry and Molecular Biology, University of Hamburg , Germany
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13
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Gandini G, Franchini M, Vassanelli A, De Gironcoli M, Ferro I, Bertuzzo D, Antonello O, Aprili G. Immunohematological aspects of bone marrow transplantation. Hematology 2002; 7:89-93. [PMID: 12186697 DOI: 10.1080/10245330290022151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 10/28/2022] Open
Abstract
Allogeneic bone marrow transplantation (BMT) is an effective treatment for some severe hematologic or nonhematologic diseases. The blood group antigen mismatch between donor and recipient may cause immunohematological complications during or after BMT. In this review, we analyze the ABO, Rh and other red cell antigen mismatches between donor and recipient, the main immunohematological complications and the techniques to prevent them. The data reported are derived from the experience of the authors and from the medical literature. The clinical implications of the immunohematological aspects of BMT emphasize the importance of close immunohematological monitoring in patients undergoing allogeneic BMT with ABO, Rh or other red cell antigen mismatches between donor and recipient.
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Affiliation(s)
- G Gandini
- Servizio di Immunoematologia e transfusione, Azienda Ospedaliera di Verona, Verona, Italy.
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14
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Gandini G, Franchini M, de Gironcoli M, Giuffrida A, Bertuzzo D, Zanolla L, Ferro I, Regis D, Aprili G. Preoperative autologous blood donation by elderly patients undergoing orthopaedic surgery. Vox Sang 2001; 80:95-100. [PMID: 11378971 DOI: 10.1046/j.1423-0410.2001.00020.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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
BACKGROUND AND OBJECTIVES To assess the feasibility of a programme of predeposit in elderly patients undergoing elective orthopaedic surgery. PATIENTS AND METHODS We retrospectively studied 789 elderly patient candidates (> 65 years of age) for orthopaedic surgery (total hip and knee replacement and spinal surgery), who were undergoing a programme of preoperative autologous blood donation (PABD) in our city hospital between January 1990 and December 1998. RESULTS Six hundred and eighty-eight patients (87.2%) were transfused with autologous blood; 128 (16.2%) also received allogeneic blood. Hip arthroplasty revision was characterized by the greatest blood consumption. The predeposit programme was discontinued in 96 patients (12.2%) because of the following complications: the onset of anaemia (11.0%); vasovagal reactions (0.5%); lack of venous access (0.4%); or cardiac complications (0.2%). No episodes of reaction to autologous transfusion were recorded. CONCLUSIONS Our study confirms the feasibility of PABD in elderly patients undergoing elective orthopaedic surgery.
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Affiliation(s)
- G Gandini
- Servizio di Immunoematologia e Trasfusione Ospedale Policlinico, Via delle Menegone, 10-37134 Verona, Italy.
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Piacentini GL, Mazzi P, Vinco S, Peroni DG, Ferro I, Vicentini L, Boner AL. The effect of cetirizine on the integrin-dependent respiratory burst of normodense eosinophils. J Asthma 1996; 33:417-23. [PMID: 8968296 DOI: 10.3109/02770909609068186] [Citation(s) in RCA: 3] [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: 02/03/2023]
Abstract
It has been proposed that cetirizine inhibits eosinophil migration and adherence. We evaluated the possible effect of cetirizine on integrin-induced eosinophil proinflammatory activation. Normodense eosinophils were triggered with monoclonal antibodies to integrins in the presence of different concentrations of certirizine. Proinflammatory activation was measured by evaluation of O2- production. Only at high concentrations (250 micrograms/ml) and in the first 15 min did certirizine significantly inhibit (p < 0.02) the eosinophil respiratory burst. No effect was shown for lower concentrations (50 and 100 micrograms/ml) or after 15 min. These data suggest that, only at very high concentrations, cetirizine may induce a transient inhibition of the integrin-induced eosinophil respiratory burst.
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Abstract
Different regions of the body of an animal have their own shape and location within visual space. Accordingly, in the superior colliculus there are somatosensory-visual bimodal neurons receiving tactile and visual input from the same region of space. In newborn mice, we changed the position of some body parts within visual space in order to see what happened to the alignment of the somatosensory and visual receptive fields of superior colliculus bimodal neurons. To do this, we modified the shape of the head by displacing the superior vibrissae and the ears, normally in the superior portion of visual space, into the inferior visual space. Analogously, we bent the inferior vibrissae into the superior visual space. At the sixth postnatal week we recorded from somatosensory-visual bimodal neurons of the deep layers of the superior colliculus and found that the tactile and visual receptive fields were aligned. Neurons receiving tactile input from the downward-displaced superior vibrissae and ears showed visual receptive fields in the inferior portion of visual space, whereas neurons receiving input from the upward-displaced inferior vibrissae showed visual receptive fields in the superior visual space. These results show that an experience-dependent interaction between visual and somatosensory inputs occurs during development, and that early exposure to abnormal visual-somatosensory experience modifies the organization of multisensory neurons in the superior colliculus.
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Affiliation(s)
- F Benedetti
- Dipartimento di Anatomia e Fisiologia Umana, Università di Torino, Italy
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17
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Abstract
In newborn mice, we modified the body scheme by implanting artificial whiskers (pig hair) on the ears, which are located in the superior and temporal portions of the visual field. In normal mice, multisensory neurons in the deep layers of the superior colliculus receiving somatosensory input from the ears showed visual receptive fields in the superior and temporal portions of visual space. By contrast, in the implanted mice, there was a modification of the visual receptive fields strictly related to the direction of the artificial whiskers. If these were directed toward the nose, visual receptive fields expanded in the nasal direction. If the whiskers were directed downward, visual receptive fields expanded downward. These results show that an interaction between visual and somatosensory inputs occurs in the superior colliculus during development, and that the collicular visual topography undergoes a re-mapping on the basis of the altered tactile experience.
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Affiliation(s)
- F Benedetti
- Dipartimento di Anatomia e Fisiologia Umana, Università di Torino, Italy
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Bellavite P, Chirumbolo S, Lippi G, Andrioli G, Bonazzi L, Ferro I. Dual effects of formylpeptides on the adhesion of endotoxin-primed human neutrophils. Cell Biochem Funct 1993; 11:231-9. [PMID: 7903912 DOI: 10.1002/cbf.290110403] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Neutrophils, treated with sequential additions of bacterial products such as endotoxin (E. Coli lipopolysaccharide, LPS) and the chemotactic peptide N-formyl-methionyl-leucyl-phenylalanine (fMLP), undergo to metabolic activation and express membrane-anchoring proteins that promote adhesion to serum-coated culture wells. By investigating the dose-response relationships of these phenomena, we have found that: (a) resting neutrophils do not produce a significant amount of superoxide (O2-) and show only minimal adhesion to serum-coated plastic surfaces; (b) fully activatory doses (> 5 x 10(-8) M) of fMLP induce the release of O2- and a significant increase of the cell adhesion; (c) pretreatment of the cells for 1 h with LPS augments cell adhesion to serum-coated culture wells in the absence of further stimulation and primes the neutrophils to enhanced fMLP-dependent O2- release; (d) addition of low, substimulatory doses of fMLP (from 10(-10) M to 5 x 10(-9) M) inhibits and reverses the adhesion of LPS-treated cells, (e) high fMLP doses ( > 10(-7) M) are additive to LPS in promoting adhesion. Phorbol-myristate acetate (> 10(-9) M) increased adhesion in both normal and LPS-treated neutrophils, but low doses of this stimulant did not inhibit adhesion. Low doses (10(-9) M) of fMLP increased intracellular cyclic AMP in both normal and LPS-treated neutrophils, suggesting that stimulus-induced rises in cAMP may be the negative signal responsible for down-modulation of adhesion.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- P Bellavite
- Istituto di Chimica e Microscopia Clinica, University of Verona, Italy
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Cassatella MA, Bazzoni F, Ceska M, Ferro I, Baggiolini M, Berton G. IL-8 production by human polymorphonuclear leukocytes. The chemoattractant formyl-methionyl-leucyl-phenylalanine induces the gene expression and release of IL-8 through a pertussis toxin-sensitive pathway. J Immunol 1992; 148:3216-20. [PMID: 1578146] [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: 12/27/2022]
Abstract
IL-8 is a novel chemotactic cytokine, produced by a variety of blood and tissue cells, that has marked activating effects on polymorphonuclear leukocytes (PMN). We report that IL-8 is produced and released by human PMN after stimulation with the chemotactic agonist FMLP. Release of IL-8 in response to FMLP was transient and not influenced by PMN adherence or by the absence of serum in the medium. Maximum yields were usually obtained with 10 nM FMLP within 2 h of stimulation (0.5-3.5 ng/ml/7 x 10(6) cells, range of 17 different donors). IL-8 release was dependent on FMLP-induced de novo protein synthesis because it was inhibited by cycloheximide, was paralleled by enhanced expression of IL-8 mRNA and was potentiated from two- to sixfold after preincubation of PMN with cytochalasin B. The FMLP effect was direct and not dependent on LPS or on contaminating monocytes, which showed only low responsiveness to FMLP. Pretreatment of PMN with pertussis toxin prevented FMLP-dependent IL-8 production, the effect being evident both at the level of mRNA expression and protein secretion. In addition, two other chemoattractans, platelet-activating factor and C5a, were found capable to induce release of IL-8 by PMN. The results of this study suggest that chemotactically stimulated PMN may be able to amplify the recruitment process of PMN to the inflammatory site by releasing IL-8. As a long-lived cytokine, IL-8 could markedly prolong the attractant effect.
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Affiliation(s)
- M A Cassatella
- Institute of General Pathology, University of Verona, Italy
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20
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Cassatella MA, Bazzoni F, Ceska M, Ferro I, Baggiolini M, Berton G. IL-8 production by human polymorphonuclear leukocytes. The chemoattractant formyl-methionyl-leucyl-phenylalanine induces the gene expression and release of IL-8 through a pertussis toxin-sensitive pathway. The Journal of Immunology 1992. [DOI: 10.4049/jimmunol.148.10.3216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
IL-8 is a novel chemotactic cytokine, produced by a variety of blood and tissue cells, that has marked activating effects on polymorphonuclear leukocytes (PMN). We report that IL-8 is produced and released by human PMN after stimulation with the chemotactic agonist FMLP. Release of IL-8 in response to FMLP was transient and not influenced by PMN adherence or by the absence of serum in the medium. Maximum yields were usually obtained with 10 nM FMLP within 2 h of stimulation (0.5-3.5 ng/ml/7 x 10(6) cells, range of 17 different donors). IL-8 release was dependent on FMLP-induced de novo protein synthesis because it was inhibited by cycloheximide, was paralleled by enhanced expression of IL-8 mRNA and was potentiated from two- to sixfold after preincubation of PMN with cytochalasin B. The FMLP effect was direct and not dependent on LPS or on contaminating monocytes, which showed only low responsiveness to FMLP. Pretreatment of PMN with pertussis toxin prevented FMLP-dependent IL-8 production, the effect being evident both at the level of mRNA expression and protein secretion. In addition, two other chemoattractans, platelet-activating factor and C5a, were found capable to induce release of IL-8 by PMN. The results of this study suggest that chemotactically stimulated PMN may be able to amplify the recruitment process of PMN to the inflammatory site by releasing IL-8. As a long-lived cytokine, IL-8 could markedly prolong the attractant effect.
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Affiliation(s)
- M A Cassatella
- Institute of General Pathology, University of Verona, Italy
| | - F Bazzoni
- Institute of General Pathology, University of Verona, Italy
| | - M Ceska
- Institute of General Pathology, University of Verona, Italy
| | - I Ferro
- Institute of General Pathology, University of Verona, Italy
| | - M Baggiolini
- Institute of General Pathology, University of Verona, Italy
| | - G Berton
- Institute of General Pathology, University of Verona, Italy
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21
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Ciaffoni S, Ferro I, Potenza R, Campo G. Evans syndrome: a case of autoimmune thrombocytopenia and autoimmune hemolytic anemia caused by anti-Jka. Haematologica 1987; 72:245-7. [PMID: 3114092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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