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Colomba M, Lo Verde G, Liberto F, Gregorini A, Sparacio I. Molecular and biometric data on Carabus (Macrothorax) morbillosus Fabricius, 1792 (Coleoptera, Carabidae) from Mid Mediterranean areas. Zookeys 2022; 1127:119-134. [PMID: 36760356 PMCID: PMC9836721 DOI: 10.3897/zookeys.1127.84920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 09/28/2022] [Indexed: 02/11/2023] Open
Abstract
The present study was carried out using molecular and biometric data of Carabus (Macrothorax) morbillosus from mid-Mediterranean areas to determine additional information on basal relationships among its representative subspecies. To this aim, two different kinds of approach were employed, including a morphometric analysis of four morphological parameters (i.e., elytra length, elytra width, pronotum length, pronotum width) of 128 specimens, and a Bayesian genetic analysis of 44 cytochrome oxidase subunit I (COI) partial sequences (i.e., 38 examined for the first time and six retrieved from GenBank database). Representative populations of C. (M.) morbillosus were sampled in four countries, namely Italy, Malta, Spain, and Tunisia. The present findings support the validity of four C. (M.) morbillosus subspecies, specifically C. (M.) m. alternans, C. (M.) m. bruttianus, C. (M.) m. constantinus, and C. (M.) m. macilentus, and redefine these subspecies' distributions. Notably, within the C. (M.) m. constantinus clade, two (i.e., Sardinia/Tuscany and Lampedusa) out of the three subgroups appear as homogeneous geographical groupings.
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Affiliation(s)
- Mariastella Colomba
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Via Maggetti 22, 61029 Urbino (PU), ItalyUniversity of Urbino Carlo BoUrbinoItaly
| | - Gabriella Lo Verde
- Dipartimento di Scienze Agrarie, Alimentari e Forestali (SAAF), Università degli Studi di Palermo, Viale delle Scienze edificio 5, 90128 Palermo, ItalyUniversità degli Studi di PalermoPalermoItaly
| | - Fabio Liberto
- Via del Giubileo Magno 93, 90015 Cefalù (PA), ItalyUnaffiliatedCefalùItaly
| | - Armando Gregorini
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Via Maggetti 22, 61029 Urbino (PU), ItalyUniversity of Urbino Carlo BoUrbinoItaly
| | - Ignazio Sparacio
- Via Principe di Paternò 3, 90144 Palermo, ItalyUnaffiliatedPalermoItaly
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Brouns F, Geisslitz S, Guzman C, Ikeda TM, Arzani A, Latella G, Simsek S, Colomba M, Gregorini A, Zevallos V, Lullien‐Pellerin V, Jonkers D, Shewry PR. Do ancient wheats contain less gluten than modern bread wheat, in favour of better health? NUTR BULL 2022; 47:157-167. [PMID: 35915783 PMCID: PMC9322029 DOI: 10.1111/nbu.12551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/25/2022] [Revised: 04/02/2022] [Accepted: 04/04/2022] [Indexed: 12/14/2022]
Abstract
Popular media messaging has led to increased public perception that gluten‐containing foods are bad for health. In parallel, ‘ancient grains’ have been promoted with claims that they contain less gluten. There appears to be no clear definition of ‘ancient grains’ but the term usually includes einkorn, emmer, spelt and Khorasan wheat. Gluten is present in all wheat grains and all can induce coeliac disease (CD) in genetically susceptible individuals. Analyses of ‘ancient’ and ‘modern’ wheats show that the protein content of modern bread wheat (Triticum aestivum) has decreased over time while the starch content increased. In addition, it was shown that, compared to bread wheat, ancient wheats contain more protein and gluten and greater contents of many CD‐active epitopes. Consequently, no single wheat type can be recommended as better for reducing the risks of or mitigating the severity of CD. An estimated 10% of the population of Western countries suffers from gastrointestinal symptoms that lack a clear organic cause and is often referred to as irritable bowel syndrome (IBS). Many of these patients consider themselves gluten sensitive, but in most cases this is not confirmed when tested in a medical setting. Instead, it may be caused by gas formation due to fermentation of fructans present in wheat or, in some patients, effects of non‐gluten proteins. A significant overlap of symptoms with those of CD, IBS and inflammatory bowel disease makes a medical diagnosis a priority. This critical narrative review examines the suggestion that ‘ancient’ wheat types are preferred for health and better tolerance.
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Affiliation(s)
- Fred Brouns
- NUTRIM‐School for Nutrition and Translational Research in Metabolism Maastricht University Maastricht The Netherlands
| | - Sabrina Geisslitz
- Institute of Applied Biosciences Karlsruhe Institute of Technology (KIT) Karlsruhe Germany
| | - Carlos Guzman
- ETSIAM Edificio Gregor Mendel Universidad de Córdoba Córdoba Spain
| | - Tatsuya M. Ikeda
- Western Region Agricultural Research Centre National Agriculture and Food Research Organization (NAR0) Hiroshima Japan
| | - Ahmad Arzani
- College of Agriculture Isfahan University of Technology Isfahan Iran
| | - Giovanni Latella
- Gastroenterology, Hepatology and Nutrition Division University of L’Aquila L’Aquila Italy
| | | | | | | | | | | | - Daisy Jonkers
- NUTRIM School for Nutrition and Translational Research in Metabolism Maastricht University Maastricht The Netherlands
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Colomba M, Sigwart JD, Renda W, Gregorini A, Sosso M, Dell’Angelo B. Molecular analysis of Lepidopleuruscajetanus (Poli, 1791) (Polyplacophora, Leptochitonidae) from the Mediterranean and near Atlantic. Zookeys 2022; 1099:29-40. [PMID: 36761442 PMCID: PMC9848924 DOI: 10.3897/zookeys.1099.75837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 03/28/2022] [Indexed: 11/12/2022] Open
Abstract
In the present paper we used a molecular data set (including mitochondrial partial 16S rRNA and COI gene sequences) to examine the genetic structure of Lepidopleuruscajetanus (Poli, 1791) (Polyplacophora, Leptochitonidae) - a distinctive shallow water chiton and member of the basal branching Lepidopleurida, which is widespread in and adjacent to the Mediterranean. The analyses of the two mt-standard marker fragments resolved two main discrete clusters reported as L.cajetanus s.s. and L.aff.cajetanus, respectively. Lepidopleuruscajetanus s.s. is widespread throughout the area under study, while the second distinct lineage apparently co-occurs on the eastern Spanish mainland coast of the Balearic Sea. This result is discussed comparing our data with those reported, in 2014, by Fernández and colleagues who described L.cajetanus as exhibiting "a 'chaotic patchiness' pattern defined by a high genetic variability with locality-exclusive haplotypes, high genetic divergence, and a lack of geographic structure". Although genetic data alone are not sufficient to draw any definitive conclusions, nevertheless we believe that present results shed new light on L.cajetanus which apparently shows more geographically patterned genetic structure than supposed so far.
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Affiliation(s)
- Mariastella Colomba
- University of Urbino, Dept. of Biomolecular Sciences, via I. Maggetti 22, 61029 Urbino (PU), Italy
| | - Julia D. Sigwart
- Senckenberg Research Institute and Museum, Senckenberganlage 25, 60325 Frankfurt, Germany
| | | | - Armando Gregorini
- University of Urbino, Dept. of Biomolecular Sciences, via I. Maggetti 22, 61029 Urbino (PU), Italy
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Geisslitz S, Weegels P, Shewry P, Zevallos V, Masci S, Sorrells M, Gregorini A, Colomba M, Jonkers D, Huang X, De Giorgio R, Caio GP, D'Amico S, Larré C, Brouns F. Wheat amylase/trypsin inhibitors (ATIs): occurrence, function and health aspects. Eur J Nutr 2022; 61:2873-2880. [PMID: 35235033 PMCID: PMC9363355 DOI: 10.1007/s00394-022-02841-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 02/11/2022] [Indexed: 12/20/2022]
Abstract
Amylase/trypsin inhibitors (ATIs) are widely consumed in cereal-based foods and have been implicated in adverse reactions to wheat exposure, such as respiratory and food allergy, and intestinal responses associated with coeliac disease and non-coeliac wheat sensitivity. ATIs occur in multiple isoforms which differ in the amounts present in different types of wheat (including ancient and modern ones). Measuring ATIs and their isoforms is an analytical challenge as is their isolation for use in studies addressing their potential effects on the human body. ATI isoforms differ in their spectrum of bioactive effects in the human gastrointestinal (GI), which may include enzyme inhibition, inflammation and immune responses and of which much is not known. Similarly, although modifications during food processing (exposure to heat, moisture, salt, acid, fermentation) may affect their structure and activity as shown in vitro, it is important to relate these changes to effects that may present in the GI tract. Finally, much of our knowledge of their potential biological effects is based on studies in vitro and in animal models. Validation by human studies using processed foods as commonly consumed is warranted. We conclude that more detailed understanding of these factors may allow the effects of ATIs on human health to be better understood and when possible, to be ameliorated, for example by innovative food processing. We therefore review in short our current knowledge of these proteins, focusing on features which relate to their biological activity and identifying gaps in our knowledge and research priorities.
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Affiliation(s)
| | - Peter Weegels
- Netherlands and European Bakery Innovation Centre, Sonneveld Group BV, Papendrecht, and Wageningen University and Research, Wageningen, Netherlands
| | - Peter Shewry
- Laboratory of Food Chemistry, Rothamsted Research, Harpenden, UK
| | - Victor Zevallos
- Nutrition and Food Research Group, Department of Applied and Health Sciences, University of Northumbria, Newcastle Upon Tyne, UK
| | - Stefania Masci
- Department of Agricultural and Forestry Sciences, University of Tuscia, Tuscia, Italy
| | - Mark Sorrells
- School of Integrative Plant Science, Plant Breeding and Genetics Section, Cornell University, Ithaca, USA
| | - Armando Gregorini
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Mariastella Colomba
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Daisy Jonkers
- Division of Gastroenterology-Hepatology, Department Internal Medicine, School for Nutrition and Translational Research in Metabolism Maastricht, Maastricht University, Maastricht, Netherlands
| | - Xin Huang
- Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Roberto De Giorgio
- Department of Translational Medicine, St. Anna Hospital, University of Ferrara, Ferrara, Italy
| | - Giacomo P Caio
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Ferrara, Italy
| | - Stefano D'Amico
- Institute for Animal Nutrition and Feed, AGES - Austrian Agency for Health and Food Safety, Vienna, Austria
| | - Colette Larré
- INRAE UR1268 BIA, Impasse Thérèse Bertrand-Fontaine, 44000, Nantes, France
| | - Fred Brouns
- Department of Human Biology, School for Nutrition and Translational Research in Metabolism Maastricht, Maastricht University, Maastricht, Netherlands
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Colomba MS, Gregorini A, Cilia DP, Liberto F, Reitano A, Sparacio I. Molecular studies on the genus Muticaria Lindholm, 1925 (Pulmonata, Clausiliidae) from the Maltese Islands. Biodiversity Journal 2019. [DOI: 10.31396/biodiv.jour.2019.10.4.517.526] [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: 11/23/2022] Open
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Bouaziz-Yahiatene H, Inäbnit T, Medjdoub-Bensaad F, Colomba MS, Sparacio I, Gregorini A, Liberto F, Neubert E. Revisited - the species of Tweeting vineyard snails, genus Cantareus Risso, 1826 (Stylommatophora, Helicidae, Helicinae, Otalini). Zookeys 2019; 876:1-26. [PMID: 31582884 PMCID: PMC6761209 DOI: 10.3897/zookeys.876.36472] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 08/19/2019] [Indexed: 11/26/2022] Open
Abstract
The generic allocation of Helixsubaperta is clarified by using genetic data and morphological traits of the genital organs; its position within the hitherto monotypic genus Cantareus is corroborated. Further analysis of several specimens of Cantareusapertus from Algeria and Italy revealed that this taxon is composed of two species, C.apertus from Italy, and C.koraegaelius from Algeria. The morphological traits of the genital organs of all three species are discussed, and the definition of the genus Cantareus is amended. All three species confined to Cantareus are re-described, and the syntype specimen of H.aperta is illustrated.
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Affiliation(s)
- Houria Bouaziz-Yahiatene
- Laboratoire de Production, sauvegarde des espèces menacées et des récoltes, Influence des variations climatiques, Département de Biologie, Faculté des Sciences Biologiques et des Sciences Agronomiques, Université Mouloud Mammeri de Tizi-Ouzou, 15000, Algeria
| | - Thomas Inäbnit
- Natural History Museum of the Burgergemeinde Bern, Bernastrasse 15, CH-3005 Bern, Switzerland.,Institute of Ecology and Evolution, University of Bern, 3012 Bern, Switzerland
| | - Ferroudja Medjdoub-Bensaad
- Laboratoire de Production, sauvegarde des espèces menacées et des récoltes, Influence des variations climatiques, Département de Biologie, Faculté des Sciences Biologiques et des Sciences Agronomiques, Université Mouloud Mammeri de Tizi-Ouzou, 15000, Algeria
| | - Maria Stella Colomba
- University of Urbino, Dept. of Biomolecular Sciences, Via I. Maggetti 22, 61029 Urbino (PU), Italy
| | | | - Armando Gregorini
- University of Urbino, Dept. of Biomolecular Sciences, Via I. Maggetti 22, 61029 Urbino (PU), Italy
| | - Fabio Liberto
- Via del Giubileo Magno n 93, 90015 Cefalù (PA), Italy
| | - Eike Neubert
- Natural History Museum of the Burgergemeinde Bern, Bernastrasse 15, CH-3005 Bern, Switzerland.,Institute of Ecology and Evolution, University of Bern, 3012 Bern, Switzerland
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Tomasetti M, Re M, Monaco F, Gaetani S, Rubini C, Bertini A, Pasquini E, Bersaglieri C, Bracci M, Staffolani S, Colomba M, Gregorini A, Valentino M, Tagliabracci A, Bovenzi M, Neuzil J, Amati M, Santarelli L. MiR-126 in intestinal-type sinonasal adenocarcinomas: exosomal transfer of MiR-126 promotes anti-tumour responses. BMC Cancer 2018; 18:896. [PMID: 30223817 PMCID: PMC6142309 DOI: 10.1186/s12885-018-4801-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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] [Received: 04/09/2018] [Accepted: 09/05/2018] [Indexed: 12/14/2022] Open
Abstract
Background Intestinal-type sinonasal adenocarcinomas (ITACs) are aggressive malignancies related to wood dust and leather exposure. ITACs are generally associated with advanced stage at presentation due to the insidious growth pattern and non-specific symptoms. Therefore, biomarkers that can detect the switch from the benign disease to malignancy are needed. Essential for tumour growth, angiogenesis is an important step in tumour development and progression. This process is strictly regulated, and MiR-126 considered its master modulator. Methods We have investigated MiR-126 levels in ITACs and compared them to benign sinonasal lesions, such as sinonasal-inverted papillomas (SIPs) and inflammatory polyps (NIPs). The tumour-suppressive functions of MiR-126 were also evaluated. Results We found that MiR-126 can significantly distinguish malignancy from benign nasal forms. The low levels of MiR-126 in ITACs point to its role in tumour progression. In this context, restoration of MiR-126 induced metabolic changes, and inhibited cell growth and the tumorigenic potential of MNSC cells. Conclusions We report that MiR-126 delivered via exosomes from endothelial cells promotes anti-tumour responses. This paracrine transfer of MiRs may represent a new approach towards MiR-based therapy. Electronic supplementary material The online version of this article (10.1186/s12885-018-4801-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Marco Tomasetti
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy. .,International Society of Doctors for the Environment (ISDE), Arezzo, Italy.
| | - Massimo Re
- Department of Clinical and Molecular Sciences, Section of Otorhinolaryngology, Polytechnic University of Marche, Ancona, Italy
| | - Federica Monaco
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy
| | - Simona Gaetani
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy
| | - Corrado Rubini
- Department of Biomedical Sciences and Public Health, Section of Anatomical Pathology, Polytechnic University of Marche, Ancona, Italy
| | - Andrea Bertini
- Department of Clinical and Molecular Sciences, Section of Otorhinolaryngology, Polytechnic University of Marche, Ancona, Italy
| | - Ernesto Pasquini
- Surgical Department, ENT Metropolitan Unit, Bellaria & Budrio Hospital, Bologna, Italy
| | - Cristiana Bersaglieri
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy
| | - Massimo Bracci
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy
| | - Sara Staffolani
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy
| | - Mariastella Colomba
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, PU, Italy
| | - Armando Gregorini
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, PU, Italy
| | - Matteo Valentino
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy
| | - Adriano Tagliabracci
- Department of Biomedical Sciences and Public Health, Section of Legal Medicine, Polytechnic University of Marche, Ancona, Italy
| | - Massimo Bovenzi
- Department of Medical Sciences, Clinical Unit of Occupational Medicine, School of Medicine, University of Trieste, Trieste, Italy
| | - Jiri Neuzil
- School of Medical Science, Griffith University, Southport, Australia.,Institute of Biotechnology, Czech Academy of Sciences, Prague-West, Czech Republic
| | - Monica Amati
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy
| | - Lory Santarelli
- Department of Clinical and Molecular Sciences, Section of Occupational Medicine, Polytechnic University of Marche, Via Tronto 10/a, 60020, Ancona, Italy.
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Šuligoj T, Gregorini A, Colomba M, Ellis HJ, Ciclitira PJ. Evaluation of the safety of ancient strains of wheat in coeliac disease reveals heterogeneous small intestinal T cell responses suggestive of coeliac toxicity. Clin Nutr 2013; 32:1043-9. [DOI: 10.1016/j.clnu.2013.02.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 01/23/2013] [Accepted: 02/08/2013] [Indexed: 01/31/2023]
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Gregorini A, Ruiz ME, Volonté MG. A derivative UV spectrophotometric method for the determination of levothyroxine sodium in tablets. J Anal Chem 2013. [DOI: 10.1134/s1061934813060075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Colomba MS, Gregorini A. Are ancient durum wheats less toxic to celiac patients? A study of α-gliadin from Graziella Ra and Kamut. ScientificWorldJournal 2012; 2012:837416. [PMID: 22629212 PMCID: PMC3354720 DOI: 10.1100/2012/837416] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [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: 10/26/2011] [Accepted: 01/12/2012] [Indexed: 01/27/2023] Open
Abstract
In the present paper, the controversial hypothesis suggesting ancient grains might show lower immunogenic properties and therefore the possibility to introduce them in the diet of wheat-sensitive people, including celiac patients, was investigated. The immunogenic potential of the ancient durum wheats Graziella Ra and Kamut was studied by comparison to the durum accessions Cappelli, Flaminio, Grazia and Svevo. Experiments were carried out with two monoclonal antibodies (mAbs) raised against α-gliadin peptides p31–49 and p56–75 (the latter containing the overlapping DQ2-Glia-α1 and DQ2-Glia-α2 epitopes), toxic for celiac patients. For all accessions, a few α-gliadin alleles were also cloned, sequenced and translated into aminoacid sequences. Several aminoacid substitutions or deletions were detected in p31–49, DQ2-Glia-α1 and DQ2-Glia-α2 epitopes, nevertheless, ELISA constantly showed antibody-antigen positive reactions which led us to suggest that mAbs binding was not apparently affected by polymorphisms. Moreover, a few substitutions were also observed in DQ2-Glia-α3 and DQ8-Glia-α1 epitopes. Although some DQ2-Glia-α1 and DQ2-Glia-α2 variants evidenced herein were previously reported to have a diminished or abolished T cell stimulatory capacity, present results cannot confirm that ancient durum wheats would be less CD-toxic. In conclusion, we strongly advice celiac patients from consuming ancient wheats including Graziella Ra or Kamut.
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Affiliation(s)
- M Stella Colomba
- Dipartimento di Scienze della Terra, della Vita e dell'Ambiente, Università di Urbino Carlo Bo, Via Maggetti 22, 61029 Urbino, Italy.
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Libertini A, Vitturi R, Gregorini A, Colomba M. Karyotypes, Banding Patterns and Nuclear DNA Content inCrepidula unguiformisLamarck, 1822, andNaticarius stercusmuscarum(Gmelin, 1791) (Mollusca, Caenogastropoda). Malacologia 2009. [DOI: 10.4002/040.051.0107] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Gregorini A, Tomasetti M, Cinti C, Colomba D, Colomba S. CD38 expression enhances sensitivity of lymphoma T and B cell lines to biochemical and receptor-mediated apoptosis. Cell Biol Int 2006; 30:727-32. [PMID: 16839787 DOI: 10.1016/j.cellbi.2006.05.004] [Citation(s) in RCA: 7] [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] [Received: 02/15/2006] [Revised: 04/11/2006] [Accepted: 05/10/2006] [Indexed: 11/26/2022]
Abstract
CD38 has been widely characterised both as an ectoenzyme and as a receptor. In the present paper, we investigated the role of CD38 as possible modulator of apoptosis. CD38-positive (CD38(+)) and negative (CD38(-)) fractions, obtained by sorting CD38(+) cells from lymphoma T (Jurkat) and lymphoma B (Raji) and by transfecting lymphoma LG14 and myeloid leukemia K562 cell lines, were used. Cellular subpopulations were exposed to different triggers (H(2)O(2), UV-B, alpha-TOS and hrTRAIL) and the extent of apoptosis was determined by Annexin V-FITC/PI assay. Our data showed that, in lymphoma cells, propensity to apoptosis was significantly linked to CD38 expression and that, remarkably, such response was independent of the nature of the trigger used. Inhibition of CD38 expression by antisense oligonucleotides treatment resulted in CD38-silenced fractions which were as prone to apoptosis as CD38(-) ones. Notably, susceptibility of K562 to apoptosis-inducing challenges was not affected by CD38 expression.
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Affiliation(s)
- Armando Gregorini
- Istituto di Psicologia L. Meschieri, Università di Urbino Carlo Bo, via O. Ubaldini 17, 61029 Urbino (PU), Italy.
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Colomba M, Vitturi R, Libertini A, Gregorini A, Zunino M. Heterochromatin of the scarab beetle, Bubas bison (Coleoptera: Scarabaeidae) II. Evidence for AT-rich compartmentalization and a high amount of rDNA copies. Micron 2006; 37:47-51. [PMID: 16140020 DOI: 10.1016/j.micron.2005.06.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2005] [Revised: 05/16/2005] [Accepted: 06/17/2005] [Indexed: 11/17/2022]
Abstract
An unexpected result arising from a previous characterization of the scarab beetle Bubas bison (Coleoptera: Scarabaeidae) heterochromatin was its unusual homogeneous reaction to different staining methods. In particular, silver stainability of heterochromatic ends of all chromosomes prevented identification of the number of rDNA transcriptionally active regions. Data formerly obtained using silver impregnation (Ag-NOR), C- G- and DAPI banding are here improved and completed by application of CMA(3) staining and rDNA FISH with the aim to investigate heterochromatin base composition and locate rDNA regions with respect to NOR-associated heterochromatin. Our results show that B. bison has a high amount of heterochromatin (almost 50%) and that--as revealed by rDNA FISH--major rRNA genes are spread over the heterochromatic telomeric regions of eight chromosomes, thus suggesting that only a portion, although consistent, of total heterochromatin is associated with ribosomal clusters. Moreover, DAPI-positive (AT-specific) and CMA(3)-negative (GC-specific) reactions of heterochromatic DNA confirm its AT-rich composition. Finally, possible explanations for the bright DAPI-fluorescence of both heterochromatin and rDNA sequences are discussed.
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Affiliation(s)
- Mariastella Colomba
- Istituto di Ecologia e Biologia Ambientale, Università di Urbino Carlo Bo, Urbino, Italy.
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Vitturi R, Libertini A, Sineo L, Sparacio I, Lannino A, Gregorini A, Colomba M. Cytogenetics of the land snails Cantareus aspersus and C. mazzullii (Mollusca: Gastropoda: Pulmonata). Micron 2005; 36:351-7. [PMID: 15857774 DOI: 10.1016/j.micron.2004.12.010] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2004] [Revised: 11/01/2004] [Accepted: 12/02/2004] [Indexed: 10/25/2022]
Abstract
A cytogenetic study was carried out on the chromosomes and nuclear DNA contents of the land snails Cantareus aspersus and C. mazzullii (Gastropoda: Pulmonata). Chromosomes were studied using Giemsa staining, banding methods and fluorescent in situ hybridization (FISH) with three repetitive DNA probes [18S rDNA, (GATA)(n) and (TTAGGG)(n)]. Results were very similar in the two species both showing (1) 54 bi-armed chromosomes [submetacentrics (SM) + metacentrics (M) + subtelocentrics (ST)]; (2) 10 terminal NORs after sequential application of rDNA FISH and silver staining; (3) uniform DNA fluorescence with CMA(3) and DAPI staining and (4) genomic composition considerably enriched both in highly- and moderately-repeated DNAs. The telomeric (TTAGGG)(n) sequence hybridized with the termini of all of the chromosomes in the two species. In spite of their apparent karyological uniformity, flow cytometry DNA assays showed that C. aspersus and C. mazzullii are characterized by different nuclear DNA content (C values are 3.58 and 3.08 pg, respectively) and slightly different base composition in their genomes. Present data on GS and AT% in C. mazzullii and C. aspersus confirm the trend toward high GS values and GC percentages among land snails.
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Affiliation(s)
- Roberto Vitturi
- Dipartimento di Biologia Animale, Università di Palermo, Via Archirafi 18, 90123 Palermo, Italy
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15
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Righi L, Deaglio S, Pecchioni C, Gregorini A, Horenstein AL, Bussolati G, Sapino A, Malavasi F. Role of CD31/platelet endothelial cell adhesion molecule-1 expression in in vitro and in vivo growth and differentiation of human breast cancer cells. Am J Pathol 2003; 162:1163-74. [PMID: 12651608 PMCID: PMC1851235 DOI: 10.1016/s0002-9440(10)63912-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Breast ductal carcinoma in situ is an intraductal proliferation of malignant epithelial cells that diffuse within the ductal system without stromal invasion. Our finding that a subset of these tumors express CD31/platelet endothelial cell adhesion molecule-1 suggests that breast cancer represents an informative model for studying the involvement of the molecule in the morphogenesis, differentiation, and diffusion of this disease. Transfection of CD31 in MDA-MB-231 cells caused reduction in growth, loss of CD44, and acquisition of a ductal morphology. The same effects were maintained in vivo, in which CD31(+) tumors grew with in situ-like aspects, papillary differentiation, and a secretory phenotype. CD44 was down-modulated, with the CD31(+) cells blocked in the G(1) phase. The morphology was highly similar to what was observed in some human CD31(+) ductal carcinomas in situ. MDA-MB-231 mock cells grew in solid sheets, lacking stromal material, and displaying high levels of CD44 and proliferation. CD31(+) cells acquired motility characteristics in in vitro assays, a finding confirmed in vivo by the diffusion of human tumor cells throughout the normal ducts residual in the murine mammary gland. In conclusion, CD31 expression reverts the undifferentiated morphology and aggressive behavior of MDA-MB-231 cells, indicating its active role in the morphogenesis of breast ductal in situ carcinomas.
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Affiliation(s)
- Luisella Righi
- Department of Genetics, Biology, and Biochemistry, Laboratory of Immunogenetics, University of Torino Medical School, Torino, Italy
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16
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Gregorini A, Cinti C, Pigliapoco F, Deaglio S, Ferrero E, Papa S, Palma F. Rapid and sensitive detection of recombinant soluble proteins in the supernatant of transfected mammalian cells. J BIOL REG HOMEOS AG 2002; 16:93-7. [PMID: 12144132] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Cloning and expression of recombinant soluble proteins could be quite a difficult task, especially when it comes to reliably detect minute amounts of the soluble protein in the supernatant of transfected mammalian cells. Timing and sensitivity are of the essence in order to optimise the benefits/costs balance and to decide which clones to grow further and which ones to discard. Here we propose a modified inhibition assay. The key feature of this approach is the development of a sensitive and quantitative test to detect the presence of the recombinant soluble protein by exploiting its ability to compete with the binding of a specific monoclonal antibody to a target cell. The described procedure is a sensitive, efficient, dependable and low cost method.
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Affiliation(s)
- A Gregorini
- Institute of Biology and Genetics, University of Ancona, Italy.
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17
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Deaglio S, Zubiaur M, Gregorini A, Bottarel F, Ausiello CM, Dianzani U, Sancho J, Malavasi F. Human CD38 and CD16 are functionally dependent and physically associated in natural killer cells. Blood 2002; 99:2490-8. [PMID: 11895784 DOI: 10.1182/blood.v99.7.2490] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.9] [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: 11/20/2022] Open
Abstract
CD38, a surface glycoprotein of unrestricted lineage, is an ectoenzyme (adenosine diphosphate [ADP] ribosyl cyclase/cyclic ADP-ribose hydrolase) that regulates cytoplasmic calcium. The molecule also performs as a receptor, modulating cell-cell interactions and delivering transmembrane signals, despite showing a structural ineptitude to the scope. CD38 ligation by agonistic monoclonal antibodies induced signals leading to activation of the lytic machinery of natural killer (NK) cells from adults; similar signals could not be reproduced in YT and NKL, 2 CD16(-) human NK-like lines. It was hypothesized that CD38 establishes a functional cooperation with professional signaling molecules of the NK cell surface. The present work answers the question about the molecule exploited by CD38 for signaling in NK cells, using as a model CD16(-) NK lines genetically corrected for CD16 expression. Our results indicate that a functional CD16 molecule is a necessary and sufficient requisite for CD38 to control an activation pathway, which includes calcium fluxes, tyrosine phosphorylation of ZAP70 and mitogen-activated protein kinase, secretion of interferon-gamma, and cytotoxic responses. Fluorescence resonance energy transfer and cocapping experiments also showed a surface proximity between CD38 and CD16. These results were confirmed by using the NKL cell line, in which CD16(+) and CD16(-) variants were obtained without genetic manipulation. Together, our findings show CD38 to be a unique receptor molecule that cannot signal by itself but whose receptor function is rescued by functional and physical associations with a professional signaling structure that varies according to lineage and environment. This molecule is CD16 in NK cells.
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Affiliation(s)
- Silvia Deaglio
- Laboratory of Immunogenetics, Department of Genetics, Biology and Biochemistry, University of Torino Medical School, Via Santena 19, Turin, Italy
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18
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Abstract
This survey is an overview of the applications of murine, humanized and recombinant monoclonal antibodies for in vivo diagnostic and therapeutic applications. Monoclonal antibodies (mAb) have been applied to the diagnosis and therapy of an array of human diseases. The initial failures of early clinical trials have been overcome through the production of a new generation of mAb which features reduced immunogenicity and improved targeting abilities. The early models of mAb therapy were focused on enhancing the cytolytic mechanisms against the tumor cells. More recently, successful mAb-based therapies were targeted to molecules involved in the regulation of growth of cancer cells. This has highlighted the relevance of understanding receptor-mediated signaling events, and may provide new opportunities for anti-tumor antibody targeting. Despite all the difficulties, clinical data is outlining an increasingly significant role for antibody-mediated cancer therapy as a versatile and powerful instrument in cancer treatment. One reasonable expectation is that treatment at an earlier stage in the disease process or in minimal residual disease may be more advantageous.
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Affiliation(s)
- A Funaro
- Department of Genetics, Biology and Biochemistry, University of Turin, Turin, Italy
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19
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McCullagh P, Chaplin T, Meerabux J, Grenzelias D, Lillington D, Poulsom R, Gregorini A, Saha V, Young BD. The cloning, mapping and expression of a novel gene, BRL, related to the AF10 leukaemia gene. Oncogene 1999; 18:7442-52. [PMID: 10602503 DOI: 10.1038/sj.onc.1203117] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/08/2022]
Abstract
The MLL gene is reciprocally translocated with one of a number of different partner genes in a proportion of human acute leukaemias. The precise mechanism of oncogenic transformation is unclear since most of the partner genes encode unrelated proteins. However, two partner genes, AF10 and AF17 are related through the presence of a cysteine rich region and a leucine zipper. The identification of other proteins with these structures will aid our understanding of their role in normal and leukaemic cells. We report the cloning of a novel human gene (BRL) which encodes a protein containing a cysteine rich region related to that of AF10 and AF17 and is overall most closely related to the previously known protein BR140. BRL maps to chromosome 22q13 and shows high levels of expression in testis and several cell lines. The deduced protein sequence also contains a bromodomain, four potential LXXLL motifs and four predicted nuclear localization signals. A monoclonal antibody raised to a BRL peptide sequence confirmed its widespread expression as a 120 Kd protein and demonstrated localization to the nucleus within spermatocytes.
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Affiliation(s)
- P McCullagh
- Imperial Cancer Research Fund, Department of Medical Oncology, St Bartholomew's and the Royal London School of Medicine and Dentistry, Charterhouse Square, London ECIM 6BQ, UK
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20
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Luchetti F, Gregorini A, Papa S, Burattini S, Canonico B, Valentini M, Falcieri E. The K562 chronic myeloid leukemia cell line undergoes apoptosis in response to interferon-alpha. Haematologica 1998; 83:974-80. [PMID: 9864915] [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: 02/09/2023] Open
Abstract
BACKGROUND AND OBJECTIVE The K562 cell line, derived from a chronic myeloid leukemia (CML) patient and expressing B3A2 bcr-abl hybrid gene, is known to be particularly resistant to apoptotic death. IFN-alpha treatment of CML patients impairs malignant cell clone, apparently protecting from progression to terminal blast crisis. The mechanisms underlying this kind of cell deletion are analyzed here by multiple technical approaches. DESIGN AND METHODS K562 cells, variably treated with IFN-alpha, were examined by agarose gel DNA electrophoresis, light and electron microscopy. The presence of bcr-abl rearrangement was revealed by RT-PCR. RESULTS At 4 day treatment both DNA ladder and apoptotic nuclear changes were identified, consistently in the presence of bcr-abl expression. INTERPRETATION AND CONCLUSIONS Even cells expressing bcr-abl, such as K562, can be triggered to apoptosis. Therefore, this genetic condition, commonly preventing PCD, does not prevent IFN-alpha-mediated apoptosis. PCD seems thus to be the mechanism underlying IFN-alpha-treated K562 cell deletion and it could be the basis of malignant clone reduction in IFN-alpha treated CML patients.
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Affiliation(s)
- F Luchetti
- Istituto di Scienze Morfologiche, Università di Urbino, Italy
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21
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Gregorini A, Cinti C, Young BD. Molecular abnormalities in leukemia: the 11q23 story so far. J BIOL REG HOMEOS AG 1998; 12:95-105. [PMID: 10022000] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Various hematopoietic malignant disorders have been shown to bear chromosome abnormalities of the 11q23 band, which can be rearranged with many different chromosomal regions in a wide variety of different leukemia subtypes. Several laboratories have identified a trithorax-related gene that is involved in most of the 11q23 abnormalities. Although some patterns and associations between the partner genes are beginning to emerge, it is not yet possible to frame a single unifying hypothesis for 11q23 leukaemic transformation. The aim of this review is to summarise the recent data concerning these 11q23 rearrangements and the understanding of their consequences.
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Affiliation(s)
- A Gregorini
- Istituto di Biologia e Genetica, Università degli Studi, Ancona, Italy.
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22
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Gregorini A, Filippetti A, Luchetti F, Walker A, Lillington DM, Papa S, Valentini M. The onset of CML in blastic crisis: molecular features. J BIOL REG HOMEOS AG 1997; 11:111-4. [PMID: 9498160] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The lack of distinguishing characteristics between lymphoid blastic crisis (BC) of Philadelphia (Ph)+ chronic myeloid leukemia (CML) and Ph+ acute lymphoblastic leukemia (ALL) remains an exciting dilemma. Indeed, the genetic defect of approximately half of Ph+ ALL patients is identical to that identified in CML. Here we report the case of one patient admitted with immunological and molecular patterns indicative of Ph+ ALL. The patient was brought into complete remission by chemotherapy and was transplanted with an HLA identical sibling donor, but relapsed a few months later with immunological and molecular evidence of BC of CML, displaying myeloid markers and lacking lymphoid antigens and immunoglobulin heavy chain (IgH) rearrangement. This suggest a CML case with an initial BC without a previous chronic phase or supervening on a subclinical CML.
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MESH Headings
- Adult
- Blast Crisis/genetics
- Blast Crisis/immunology
- Bone Marrow Transplantation
- Female
- Fusion Proteins, bcr-abl/genetics
- Humans
- Immunophenotyping
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/immunology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/therapy
- Recurrence
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Affiliation(s)
- A Gregorini
- Istituto di Biologia e Genetica, Università degli Studi, Ancona, Italy
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23
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Gregorini A, Sahin FI, Lillington DM, Meerabux J, Saha V, McCullagh P, Bocci M, Menevse S, Papa S, Young BD. Gene BR140, which is related to AF10 and AF17, maps to chromosome band 3p25. Genes Chromosomes Cancer 1996; 17:269-72. [PMID: 8946209 DOI: 10.1002/1098-2264(199612)17:4<269::aid-gcc2870170402>3.0.co;2-a] [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: 02/03/2023] Open
Abstract
The genes AF10 and AF17 have been identified as the basis of the t(10;11) and t(11;17) translocations, events that result in their fusion to the MLL/HRX gene in acute myeloid leukaemias. AF10 and AF17 bear significant homology to each other within their putative zinc finger and leucine zipper domains, although they are diverged outside these regions. The BR140 gene encodes a 140 kDa protein of unknown function that contains a putative zinc finger domain, a leucine zipper region, and, in addition, a bromo domain. The zinc finger and leucine zipper domains of BR140 have significant homology to those of AF10 and AF17, suggesting that it belongs to this newly described gene family and, therefore, could be a target for chromosome translocation. To assess the potential involvement of BR140 in chromosome translocations in leukaemia, the chromosomal location of the BR140 gene has been determined by using several independent methods. A combination of Southern analysis, polymerase chain reactions (PCR) on monochromosomal cell hybrids, and fluorescence in situ hybridisation (FISH) has been used to show that the BR140 gene maps to chromosome band 3p25.
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Affiliation(s)
- A Gregorini
- Imperial Cancer Research Fund, Department of Medical Oncology, St. Bartholomew's Hospital, London, United Kingdom
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24
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Reno F, Luchetti F, Vitale M, Gregorini A, Valentini M, Papa S. Sorting of cells from different cell cycle phases using surface antigen expression. ACTA ACUST UNITED AC 1996. [DOI: 10.1007/bf00122159] [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: 10/26/2022]
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25
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Saha V, Chaplin T, Gregorini A, Ayton P, Young BD. The leukemia-associated-protein (LAP) domain, a cysteine-rich motif, is present in a wide range of proteins, including MLL, AF10, and MLLT6 proteins. Proc Natl Acad Sci U S A 1995; 92:9737-41. [PMID: 7568208 PMCID: PMC40877 DOI: 10.1073/pnas.92.21.9737] [Citation(s) in RCA: 115] [Impact Index Per Article: 4.0] [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: 01/26/2023] Open
Abstract
We have identified and further characterized a Caenorhabditis elegans gene, CEZF, that encodes a protein with substantial homology to the zinc finger and leucine zipper motifs of the human gene products AF10, MLLT6, and BR140. The first part of the zinc finger region of CEZF has strong similarity to the corresponding regions of AF10 (66%) and MLLT6 (64%) at the cDNA level. As this region is structurally different from previously described zinc finger motifs, sequence homology searches were done. Twenty-five other proteins with a similar motif were identified. Because the functional domain of this motif is potentially disrupted in leukemia-associated chromosomal translocations, we propose the name of leukemia-associated protein (LAP) finger. On the basis of these comparisons, the LAP domain consensus sequence is Cys1-Xaa1-2-Cys2-Xaa9-21-Cys3-Xaa2-4 -Cys4-Xaa4-5-His5-Xaa2-Cys6-Xaa12-46 - Cys7-Xaa2-Cys8, where subscripted numbers represent the number of amino acid residues. We review the evidence that this motif binds zinc, is the important DNA-binding domain in this group of regulatory proteins, and may be involved in leukemogenesis.
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Affiliation(s)
- V Saha
- Department of Medical Oncology, Medical College of St. Bartholomew's Hospital, London, United Kingdom
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26
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Chaplin T, Ayton P, Bernard OA, Saha V, Della Valle V, Hillion J, Gregorini A, Lillington D, Berger R, Young BD. A novel class of zinc finger/leucine zipper genes identified from the molecular cloning of the t(10;11) translocation in acute leukemia. Blood 1995; 85:1435-41. [PMID: 7888665] [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: 01/27/2023] Open
Abstract
A novel class of conserved transcription factors has been identified from the molecular cloning of AF10, the gene involved in the t(10;11)(p12;q23) translocation of acute myeloid leukemias. AF10 encodes a 109-kD protein of 1,027 amino acids and contains an N-terminal zinc finger region and a C-terminal leucine zipper. These structures have been found to be conserved in sequence and position in three other proteins, AF17, BR140, and a previously unrecognized Caenorhabditis elegans gene, provisionally named CEZF. The overall structure, level of sequence conservation, and expression pattern suggest that these genes encode a new class of transcription factors, some of which are targets for chromosomal translocation in acute leukemia.
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Affiliation(s)
- T Chaplin
- Department of Medical Oncology, St Bartholomew's Hospital Medical College, London, UK
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