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Branca C, Magazù S, Maisano G, Migliardo F, Migliardo P, Romeo G. Hydration Study of PEG/Water Mixtures by Quasi Elastic Light Scattering, Acoustic and Rheological Measurements. J Phys Chem B 2002. [DOI: 10.1021/jp014345v] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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327
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Romeo G, Branca C, Magazu S, Maisano G, Migliardo F, Migliardo P. Comparative SANS and PCS investigations of the influence of trehalose and glycerol on the temperature dependent conformational properties of a hydrosoluble model system: poly(ethylene oxide). Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302095375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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328
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Puppo F, Griseri P, Fanelli M, Schena F, Romeo G, Pelicci P, Ceccherini I, Ravazzolo R, Patrone G. Cell-line specific chromatin acetylation at the Sox10-Pax3 enhancer site modulates the RET proto-oncogene expression. FEBS Lett 2002; 523:123-7. [PMID: 12123817 DOI: 10.1016/s0014-5793(02)02957-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The RET gene is expressed with high tissue and stage specificity during development. Understanding its transcriptional regulation might provide new clues to clarify developmental mechanisms. Here we show that the histone deacetylase inhibitor sodium butyrate (NaB) increases RET transcription in cells displaying low levels of its mRNA, while it has no effect in cells expressing at high levels. Chromatin immunoprecipitation (ChIP) experiments showed increased histone acetylation within the 5' flanking [corrected] region, in particular the Sox10-Pax3 enhancer site, due to NaB. Accordingly, ChIP showed different acetylation levels at the Sox10-Pax3 site associated with cell-line specific RET transcription rates. Concluding, chromatin acetylation targeted to functional sequences in the RET regulatory region may control its transcription.
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329
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Chiacchio U, Corsaro A, Iannazzo D, Piperno A, Procopio A, Rescifina A, Romeo G, Romeo R. Intramolecular cycloadditions of alpha-allyloxycarbonylnitrones: stereoselective synthesis of 3-amino-2(5H)furanones. J Org Chem 2002; 67:4380-3. [PMID: 12054980 DOI: 10.1021/jo025626h] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of furoisoxazolidines with NaH leads to functionalized 3-amino-2(5H)-furanones through a new rearrangement pattern of the isoxazolidine nucleus. This process has been usefully exploited for the synthesis of enantiomerically pure (5R)-3-alkylamino-5-methyl-2(5H)-furanones.
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Corsaro A, Pistarà V, Rescifina A, Romeo G, Romeo R, Chiacchio U. 1,3-Dipolar cycloadditions of acridine with nitrile oxides. ARKIVOC 2002. [DOI: 10.3998/ark.5550190.0003.802] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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331
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Perri P, Longo L, McConville C, Cusano R, Rees SA, Seri M, Conte M, Romeo G, Devoto M, Tonini GP. Linkage analysis in families with recurrent neuroblastoma. Ann N Y Acad Sci 2002; 963:74-84. [PMID: 12095931 DOI: 10.1111/j.1749-6632.2002.tb04097.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Neuroblastoma is a neural crest-derived tumor of childhood with a serious prognosis; only 20% of patients with stage 4 disease survive 5 years from diagnosis. Mechanisms involved in neuroblastoma development are unclear, but the engagement of many neuroblastoma-related gene(s) is suggested by specific chromosomal alterations. Most prominent among these is the amplification of the MYCN oncogene and the deletion of the 1p36 region. Other genetic aberrations have been discovered over the years such as deletions of 11q and 14q and gain of 17q. Although tumor aggressiveness greatly depends on the most frequent genetic abnormalities, to date no neuroblastoma-related gene has been discovered. Neuroblastoma usually occurs sporadically, but 1.5% of all diagnosed cases show familial recurrence with an autosomal dominant inheritance and incomplete penetrance. A comparison between hereditary and sporadic neuroblastomas led Knudson and Strong to gather that the two-hit hypothesis, proposed for retinoblastoma, could be applied to neuroblastoma. To determine if the 1p36 region harbors a predisposition gene for familial neuroblastoma, we carried out linkage analysis at 1p36 loci in two families with recurrent neuroblastoma. Similarly, we analyzed loci of chromosome 16, where a predisposition locus was recently mapped. We also analyzed markers located close to several candidate genes (RET, NF1, GDNF, GFRA1, EDNRB, and EDN3) involved to a different extent in other neurocristopathies. Our findings indicate that the candidate chromosomal regions and genes analyzed are not in linkage with neuroblastoma.
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Salerno L, Sorrenti V, Di Giacomo C, Romeo G, Siracusa MA. Progress in the development of selective nitric oxide synthase (NOS) inhibitors. Curr Pharm Des 2002; 8:177-200. [PMID: 11812267 DOI: 10.2174/1381612023396375] [Citation(s) in RCA: 175] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nitric oxide (NO), a molecular messenger synthesized by nitric oxide synthase (NOS) from L-arginine and molecular oxygen, is involved in a number of physiological and pathological processes in mammalians. Three structurally distinct isoforms of NOS have been identified: neuronal (nNOS), endothelial (eNOS) and inducible (iNOS). Although NO mediates several physiological functions, overproduction of NO by nNOS has been reported in a number of clinical disorders including acute (stroke) and chronic (schizophrenia, Alzheimer s, Parkinson s and AIDS dementia) neurodegenerative diseases, convulsions and pain; overproduction of NO by iNOS has been implicated in various pathological processes including septic shock, tissue damage following inflammation and rheumatoid arthritis. On the contrary, NO produced by eNOS has only physiological roles such as maintaining physiological vascular tone. Accordingly, selective inhibition of nNOS or iNOS vs eNOS may provide a novel therapeutic approach to various diseases; in addition selective inhibitors may represent useful tools for investigating other biological functions of NO. For these reasons, after the identification of N-methyl-L-arginine (L-NMA) as the first inhibitor of NO biosynthesis, design of selective NOS inhibitors has received much attention. In this article the recent developments of new molecules endowed with inhibitory properties against the various isoforms of NOS are reviewed. Major focus is placed on structure-activity-selectivity relationships especially concerning compounds belonging to the non-amino acid-based inhibitors.
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333
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Richichi B, Cicchi S, Chiacchio U, Romeo G, Brandi A. Chemo-, regio- and stereoselective Mitsunobu reaction of unprotected pyrimidine bases with hydroxypyrrolidines. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00712-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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334
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Chiacchio U, Corsaro A, Pistarà V, Rescifina A, Iannazzo D, Piperno A, Romeo G, Romeo R, Grassi G. Diastereoselective Synthesis ofN,O-Psiconucleosides, a New Class of Modified Nucleosides. European J Org Chem 2002. [DOI: 10.1002/1099-0690(200204)2002:7<1206::aid-ejoc1206>3.0.co;2-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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335
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Lesueur F, Corbex M, McKay JD, Lima J, Soares P, Griseri P, Burgess J, Ceccherini I, Landolfi S, Papotti M, Amorim A, Goldgar DE, Romeo G. Specific haplotypes of the RET proto-oncogene are over-represented in patients with sporadic papillary thyroid carcinoma. J Med Genet 2002; 39:260-5. [PMID: 11950855 PMCID: PMC1735081 DOI: 10.1136/jmg.39.4.260] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Papillary thyroid carcinoma (PTC), which may be sporadic (95%) or familial (5%), has a prevalence adjusted for age in the general population of 1:100 000. Somatic rearrangements of the RET proto-oncogene are present in up to 66% of sporadic tumours, while they are rarely found in familial cases. PURPOSE In order to determine if some variants of this gene, or a combination of them, might predispose to PTC, we looked for an association of RET haplotype(s) in PTC cases and in controls from four countries matched for sex, age, and population. METHODS Four single nucleotide polymorphisms (SNPs) across the RET coding sequence were typed and haplotype frequencies were estimated. Genotype and haplotype distributions were compared among these cases and controls. RESULTS Ten haplotypes were observed, the seven most frequent of which have been previously described in sporadic Hirschsprung patients and controls. The single locus analyses suggested association of exon 2 and exon 13 SNPs with sporadic PTC. The haplotype analysis showed over-representation of one haplotype in French and Italian sporadic PTC, whereas a different haplotype was significantly under-represented in French familial PTC. CONCLUSIONS Our data suggest that some variants of RET and some specific haplotypes may act as low penetrance alleles in the predisposition to PTC.
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336
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Merino P, Revuelta J, Tejero T, Chiacchio U, Rescifina A, Piperno A, Romeo G. Enantioselective synthesis of 4-hydroxy-d-pyroglutamic acid derivatives by an asymmetric 1,3-dipolar cycloaddition. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0957-4166(02)00072-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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337
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Sobol H, Benziane A, Kerangueven F, Yin L, Noguchi T, Pauly S, Eisinger F, Longy M, Romeo G, Lenoir G, Birnbaum D. Genome-wide search for loss of heterozygosity in Burkitt lymphoma cell lines. Genes Chromosomes Cancer 2002; 33:217-24. [PMID: 11793449 DOI: 10.1002/gcc.10022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The molecular biological characteristics of Burkitt lymphoma (BL), in addition to the presence of the Epstein-Barr virus (EBV) in some forms, relies on well-characterized alterations, such as MYC translocations and TP53 inactivations. To ascertain the number and location of other genome alterations, we used 191 polymorphic markers in a genome-wide search for loss of heterozygosity (LOH) in 31 Burkitt lymphoma cell lines and their normal counterparts. We were able to distinguish two types of altered allelic patterns: a bona fide LOH profile, indicative of deletion (LOH), and a profile indicative of increased dosage (ID). The former type was most frequent at chromosome arm 17p, most likely indicating TP53 gene inactivation. Increased dosage at 1q was found almost exclusively in non-EBV cell lines (P < 0.00004) and correlated well with karyotypic abnormalities affecting region 1q21-25. Our results suggest that a gene important for BL pathogenesis is located in region 1q21-25 and that the activation of this gene mimics the effects of EBV.
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338
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Panetta D, Yin L, Barale R, Romeo G, Ravazzolo R, Ceccherini I, Puliti A. Genomic organisation of the mouse Ret proto-oncogene. DNA SEQUENCE : THE JOURNAL OF DNA SEQUENCING AND MAPPING 2002; 11:501-6. [PMID: 11696976 DOI: 10.3109/10425170109041333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The RET proto-oncogene is involved in the development of both kidney and neural crests derived tissues. RET deleterious mutations cause hereditary neuroendocrine tumours and congenital intestinal aganglionosis. Ongoing efforts aimed at elucidating the function of this gene include expression studies in different species and in transgenic mice. As first step in the study of Ret expression in mouse, we obtained the mouse Ret genomic structure. Intron-exon boundaries were determined and sequenced, all introns but the first one were amplified and cloned, and exons positioned in a restriction map. Mouse and human genes comparison indicates a highly conserved genomic organisation, except for exon 21 which is not conserved in mouse. A region extending 386 bp 5' to the first exon was sequenced and compared with its human counterpart. Some features, reported for the human promoter, like the absence of TATA or CAAT boxes and a high GC content, are conserved.
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Falsaperla R, Romeo G, Di Giorgio A, Pavone P, Parano E, Connolly AM. Long-term survival in a child with arthrogryposis multiplex congenita and spinal muscular atrophy. J Child Neurol 2001; 16:934-6. [PMID: 11785510 DOI: 10.1177/088307380101601213] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Spinal muscular atrophy type 0 is a severe form of spinal muscular atrophy that is usually fatal in the first months of life. These children present with arthrogryposis multiplex congenita and respiratory compromise. We describe a child with spinal muscular atrophy and arthrogryposis multiplex congenita who has had a much better course and is alive without ventilator support at age 6 years. This case illustrates that the prognosis for spinal muscular atrophy and arthrogryposis multiplex congenita cannot always be predicted with certainty.
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Corvi R, Martinez-Alfaro M, Harach HR, Zini M, Papotti M, Romeo G. Frequent RET rearrangements in thyroid papillary microcarcinoma detected by interphase fluorescence in situ hybridization. J Transl Med 2001; 81:1639-45. [PMID: 11742034 DOI: 10.1038/labinvest.3780377] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Papillary thyroid microcarcinomas (measuring 1 cm or less in diameter) are very common thyroid tumors, which are present in 10% to 35% of post-mortem histopathological examinations of individuals whose death was due to a cause other than thyroid cancer. The molecular basis of this tumor is still poorly understood. Somatic mutations are better characterized in clinically evident papillary thyroid carcinomas (PTCs), the most common involving the proto-oncogene RET, which maps to 10q11.2. Molecular alterations of RET always lead to intra- or interchromosomal rearrangements. In this study we have investigated the status of RET in 21 microcarcinomas, by means of interphase fluorescence in situ hybridization (FISH). RET was rearranged in 52% of microcarcinomas, a statistically significant higher frequency than that found previously in clinically evident PTCs using the same technique. Moreover, interphase FISH allowed us to detect a putative novel type of rearrangement in a microcarcinoma, and we observed trisomies of chromosome 10 and other chromosomes in two adenomas surrounding two of the microcarcinomas. The strikingly high frequency of RET rearrangements in microcarcinomas strongly suggests that RET plays a role in the initiation of thyroid tumorigenesis but does not seem to be necessary for the further progression of the tumor.
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341
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Federico M, Percario Z, Olivetta E, Fiorucci G, Muratori C, Micheli A, Romeo G, Affabris E. HIV-1 Nef activates STAT1 in human monocytes/macrophages through the release of soluble factors. Blood 2001; 98:2752-61. [PMID: 11675348 DOI: 10.1182/blood.v98.9.2752] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Monocytes/macrophages play a predominant role in the immunologic network by secreting and reacting to a wide range of soluble factors. Human immunodeficiency virus (HIV) infection leads to deep immunologic dysfunctions, also as a consequence of alterations in the pattern of cytokine release. Recent studies on in vivo models demonstrated that the expression of HIV Nef alone mimics many pathogenetic effects of HIV infection. In particular, Nef expression in monocytes/macrophages has been correlated with remarkable modifications in the pattern of secreted soluble factors, suggesting that the interaction of Nef with monocytes/macrophages plays a role in the pathogenesis of acquired immunodeficiency syndrome (AIDS). This study sought to define possible alterations in intracellular signaling induced by Nef in monocytes/macrophages. Results demonstrate that HIV-1 Nef specifically activates both alpha and beta isoforms of the signal transducer and activator of transcription 1 (STAT1). This was observed both by infecting human monocyte-derived macrophages (MDMs) with HIV-1 deletion mutants, and by exploiting the ability of MDMs to internalize soluble, recombinant Nef protein (rNef). STAT1-alpha activation occurs on phosphorylation of both C-terminal Tyr701 and Ser727 and leads to a strong binding activity. Nef-dependent STAT1 activation is followed by increased expression of both STAT1 and interferon regulatory factor-1, a transcription factor transcriptionally regulated by STAT1 activation. It was also established that Nef-induced STAT1- alpha/beta activation occurs through the secretion of soluble factors. Taken together, the results indicate that HIV-1 Nef could interfere with STAT1-governed intracellular signaling in human monocytes/macrophages.
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342
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Leto G, Pricci F, Amadio L, Iacobini C, Cordone S, Diaz-Horta O, Romeo G, Barsotti P, Rotella CM, di Mario U, Pugliese G. Increased retinal endothelial cell monolayer permeability induced by the diabetic milieu: role of advanced non-enzymatic glycation and polyol pathway activation. Diabetes Metab Res Rev 2001; 17:448-58. [PMID: 11757081 DOI: 10.1002/dmrr.227] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Increased vascular permeability could be involved in the pathogenesis of diabetic retinopathy. The present study was aimed at assessing whether high glucose concentrations can impair retinal endothelial cell barrier function directly, irrespective of changes in other determinants of permeability, and the role of non-enzymatic glycation and polyol pathway activation in these alterations. METHODS Bovine retinal endothelial cells (BREC) were exposed for various periods to high glucose vs iso-osmolar mannitol and normal glucose containing media+/-agents mimicking or inhibiting advanced glycation end product (AGE) formation and polyol pathway activation. Monolayer permeability was assessed by measuring the transendothelial passage of (125)I-labeled proteins. RESULTS Permeability increased significantly (up to +70%) in BREC exposed to high glucose, but not to mannitol, for 1-30 days, vs normal glucose control cells. Exposure to AGE-modified bovine serum albumin (BSA) (> or = 90%) and, to a lesser extent, sorbitol (+28%) mimicked the high glucose effect. The AGE formation and nitric oxide synthase (NOS) inhibitor aminoguanidine significantly reduced (by 60%) changes induced by 30-day exposure to high glucose, whereas methylguanidine, which inhibits only NOS activity, did not affect permeability. Aldose reductase or sorbitol dehydrogenase inhibitors decreased (by approximately 40%) the enhanced leakage produced by 1-day, but not 30-day, incubation in high glucose. CONCLUSIONS The present results indicate that high glucose is capable of impairing retinal endothelial cell barrier function directly and that non-enzymatic glycation and polyol pathway activation may mediate these changes, with AGEs participating in the long-term alterations and increased flux through the sorbitol pathway in the short-term effect.
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343
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Mograbi B, Bocciardi R, Bourget I, Juhel T, Farahi-Far D, Romeo G, Ceccherini I, Rossi B. The sensitivity of activated Cys Ret mutants to glial cell line-derived neurotrophic factor is mandatory to rescue neuroectodermic cells from apoptosis. Mol Cell Biol 2001; 21:6719-30. [PMID: 11564857 PMCID: PMC99850 DOI: 10.1128/mcb.21.20.6719-6730.2001] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Hirschsprung's disease (HSCR), a frequent developmental defect of the enteric nervous system is due to loss-of-function mutations of RET, a receptor tyrosine kinase essential for the mediation of glial cell-derived neurotrophic factor (GDNF)-induced cell survival. Instead, gain-of-function Cys mutations (e.g., Cys(609), Cys(620), and Cys(634)) of the same gene are responsible for thyroid carcinoma (MEN2A/familial medullary thyroid carcinoma) by causing a covalent Ret dimerization, leading to ligand-independent activation of its tyrosine kinase. In this context, the association of Cys(609)- or Cys(620)-activating mutations with HSCR is still an unresolved paradox. To address this issue, we have compared these two mutants with the Cys(634) Ret variant, which has never been associated with HSCR, for their ability to rescue neuroectodermic cells (SK-N-MC cells) from apoptosis. We show here that despite their constitutively activated kinase, the mere expression of these three mutants does not allow cell rescue. Instead, we demonstrate that like the wild-type Ret, the Cys(634) Ret variant can trigger antiapoptotic pathways only in response to GDNF. In contrast, Cys(609) or Cys(620) mutations, which impair the terminal Ret glycosylation required for its insertion at the plasma membrane, abrogate GDNF-induced cell rescue. Taken together, these data support the idea that sensitivity to GDNF is the mandatory condition, even for constitutively activated Ret mutants, to rescue neuroectodermic cells from apoptosis. These findings may help clarify how a gain-of-function mutation can be associated with a developmental defect.
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344
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Matera I, De Miguel-Rodríguez M, Fernández-Santos JM, Santamaria G, Puliti A, Ravazzolo R, Romeo G, Galera-Davidson H, Ceccherini I. cDNA sequence and genomic structure of the rat RET proto-oncogene. DNA SEQUENCE : THE JOURNAL OF DNA SEQUENCING AND MAPPING 2001; 11:405-17. [PMID: 11328649 DOI: 10.3109/10425170009033991] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The RET proto-oncogene, a member of the Receptor Tyrosine Kinase family, plays a crucial role during the development of the excretory system and the enteric nervous system, as demonstrated by in vivo animal studies and by its involvement in the pathogenesis of several human neurocristopathies like Hirschsprung disease and Multiple Endocrine Neoplasia type 2. Using a multistep RT-PCR approach we have isolated and sequenced the cDNA of the whole rat RET proto-oncogene, reporting the deduced amino acid sequence in comparison with the human and mouse counterparts. Moreover, two different isoforms (RET9 and RET51) have been confirmed in the rat, while a third RET isoform demonstrated in human (RET43) has not resulted to be conserved in this species. Finally, we have determined the genomic structure of the rat RET proto-oncogene comparing the exon-intron boundaries and intron sizes with the known structure of the human homologous gene. Our findings will facilitate the molecular study of appropriate rat models of RET related human diseases.
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345
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Branca C, Magazù S, Maisano G, Migliardo F, Migliardo P, Romeo G. α,α-Trehalose/Water Solutions. 5. Hydration and Viscosity in Dilute and Semidilute Disaccharide Solutions. J Phys Chem B 2001. [DOI: 10.1021/jp010179f] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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346
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Corvi R, Lesueur F, Martinez-Alfaro M, Zini M, Decaussin M, Murat A, Romeo G. RET rearrangements in familial papillary thyroid carcinomas. Cancer Lett 2001; 170:191-8. [PMID: 11463498 DOI: 10.1016/s0304-3835(01)00596-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Familial papillary thyroid carcinoma (FPTC) is an inherited tumor characterized by a more aggressive phenotype than that of its sporadic counterpart. Its mode of inheritance as well as its genetic and molecular bases are still poorly understood. On the contrary, genetic alterations in sporadic papillary thyroid carcinoma (PTC) are better characterized, the most common one involving the activation of the proto-oncogene RET through somatic rearrangements. In the present study, we investigated by interphase fluorescence in situ hybridization the presence of RET rearrangements in a series of 20 FPTC. We show that one FPTC and the adenoma from the same patient carry a RET rearrangement (type PTC1) and that this rearrangement is absent in the germline. Furthermore, we excluded a RET haplotype sharing in two brothers of the same family. These results show that RET rearrangements can indeed be found in FPTC and confirm that RET is not involved in the inherited predisposition to FPTC.
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347
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Griseri P, Mishto M, Priolo M, Pesce B, Hamel BCJ, Romeo G, Ravazzolo R, Ceccherini I. An intronic nucleotide variant of the RET proto-oncogene causes Hirschsprung disease by interfering with RNA splicing. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/1438-826x(200012)1:5/6<184::aid-gnfd184>3.0.co;2-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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348
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Patrone G, Puppo F, Scaranari M, Cusano R, Griseri P, Romeo G, Ceccherini I, Puliti A, Ravazzolo R. Cell-line specific transcription rates of the RET gene and functional domains in its minimal promoter. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/1438-826x(200010)1:3/4<145::aid-gnfd145>3.0.co;2-o] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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349
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McKay JD, Lesueur F, Jonard L, Pastore A, Williamson J, Hoffman L, Burgess J, Duffield A, Papotti M, Stark M, Sobol H, Maes B, Murat A, Kääriäinen H, Bertholon-Grégoire M, Zini M, Rossing MA, Toubert ME, Bonichon F, Cavarec M, Bernard AM, Boneu A, Leprat F, Haas O, Lasset C, Schlumberger M, Canzian F, Goldgar DE, Romeo G. Localization of a susceptibility gene for familial nonmedullary thyroid carcinoma to chromosome 2q21. Am J Hum Genet 2001; 69:440-6. [PMID: 11438887 PMCID: PMC1235316 DOI: 10.1086/321979] [Citation(s) in RCA: 149] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2001] [Accepted: 06/12/2001] [Indexed: 11/03/2022] Open
Abstract
The familial form of nonmedullary thyroid carcinoma (NMTC) is a complex genetic disorder characterized by multifocal neoplasia and a higher degree of aggressiveness than its sporadic counterpart. In a large Tasmanian pedigree (Tas1) with recurrence of papillary thyroid carcinoma (PTC), the most common form of NMTC, an extensive genomewide scan revealed a common haplotype on chromosome 2q21 in seven of the eight patients with PTC. To verify the significance of the 2q21 locus, we performed linkage analysis in an independent sample set of 80 pedigrees, yielding a multipoint heterogeneity LOD score (HLOD) of 3.07 (alpha=0.42), nonparametric linkage (NPL) 3.19, (P=.001) at marker D2S2271. Stratification based on the presence of at least one case of the follicular variant of PTC, the phenotype observed in the Tas1 family, identified 17 such pedigrees, yielding a maximal HLOD score of 4.17 (alpha=0.80) and NPL=4.99 (P=.00002) at markers AFMa272zg9 and D2S2271, respectively. These results indicate the existence of a susceptibility locus for familial NMTC on chromosome 2q21.
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Romeo G. Aesthetic stratification of metal-ceramic crown restorations for natural manipulation of light. PRACTICAL PROCEDURES & AESTHETIC DENTISTRY : PPAD 2001; 13:411-5. [PMID: 11504461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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