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Sökning: WFRF:(Lopez Otin Carlos)

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  • Hudson, Thomas J., et al. (författare)
  • International network of cancer genome projects
  • 2010
  • Ingår i: Nature. - Nature Publishing Group. - 0028-0836. ; 464:7291, s. 993-998
  • Tidskriftsartikel (refereegranskat)abstract
    • The International Cancer Genome Consortium (ICGC) was launched to coordinate large-scale cancer genome studies in tumours from 50 different cancer types and/or subtypes that are of clinical and societal importance across the globe. Systematic studies of more than 25,000 cancer genomes at the genomic, epigenomic and transcriptomic levels will reveal the repertoire of oncogenic mutations, uncover traces of the mutagenic influences, define clinically relevant subtypes for prognosis and therapeutic management, and enable the development of new cancer therapies.
  • Klionsky, Daniel J., et al. (författare)
  • Guidelines for the use and interpretation of assays for monitoring autophagy in higher eukaryotes
  • 2008
  • Ingår i: Autophagy. - Landes Bioscience. - 1554-8627. ; 4:2, s. 151-175
  • Forskningsöversikt (övrigt vetenskapligt)abstract
    • Research in autophagy continues to accelerate,1 and as a result many new scientists are entering the field. Accordingly, it is important to establish a standard set of criteria for monitoring macroautophagy in different organisms. Recent reviews have described the range of assays that have been used for this purpose.2,3 There are many useful and convenient methods that can be used to monitor macroautophagy in yeast, but relatively few in other model systems, and there is much confusion regarding acceptable methods to measure macroautophagy in higher eukaryotes. A key point that needs to be emphasized is that there is a difference between measurements that monitor the numbers of autophagosomes versus those that measure flux through the autophagy pathway; thus, a block in macroautophagy that results in autophagosome accumulation needs to be differentiated from fully functional autophagy that includes delivery to, and degradation within, lysosomes (in most higher eukaryotes) or the vacuole (in plants and fungi). Here, we present a set of guidelines for the selection and interpretation of the methods that can be used by investigators who are attempting to examine macroautophagy and related processes, as well as by reviewers who need to provide realistic and reasonable critiques of papers that investigate these processes. This set of guidelines is not meant to be a formulaic set of rules, because the appropriate assays depend in part on the question being asked and the system being used. In addition, we emphasize that no individual assay is guaranteed to be the most appropriate one in every situation, and we strongly recommend the use of multiple assays to verify an autophagic response.
  • Alexandrov, Ludmil B., et al. (författare)
  • Signatures of mutational processes in human cancer
  • 2013
  • Ingår i: Nature. - Nature Publishing Group. - 0028-0836. ; 500:7463, s. 415-421
  • Tidskriftsartikel (refereegranskat)abstract
    • All cancers are caused by somatic mutations; however, understanding of the biological processes generating these mutations is limited. The catalogue of somatic mutations from a cancer genome bears the signatures of the mutational processes that have been operative. Here we analysed 4,938,362 mutations from 7,042 cancers and extracted more than 20 distinct mutational signatures. Some are present in many cancer types, notably a signature attributed to the APOBEC family of cytidine deaminases, whereas others are confined to a single cancer class. Certain signatures are associated with age of the patient at cancer diagnosis, known mutagenic exposures or defects in DNA maintenance, but many are of cryptic origin. In addition to these genome-wide mutational signatures, hypermutation localized to small genomic regions, 'kataegis', is found in many cancer types. The results reveal the diversity of mutational processes underlying the development of cancer, with potential implications for understanding of cancer aetiology, prevention and therapy.
  • Aoude, Lauren G, et al. (författare)
  • Nonsense Mutations in the Shelterin Complex Genes ACD and TERF2IP in Familial Melanoma.
  • 2015
  • Ingår i: Journal of the National Cancer Institute. - Oxford University Press. - 1460-2105. ; 107:2, s. 408-408
  • Tidskriftsartikel (refereegranskat)abstract
    • The shelterin complex protects chromosomal ends by regulating how the telomerase complex interacts with telomeres. Following the recent finding in familial melanoma of inactivating germline mutations in POT1, encoding a member of the shelterin complex, we searched for mutations in the other five components of the shelterin complex in melanoma families.
  • Balbin, Milagros, et al. (författare)
  • A sequence variation in the human cystatin D gene resulting in an amino acid (Cys/Arg) polymorphism at the protein level
  • 1993
  • Ingår i: Human Genetics. - Springer. - 1432-1203. ; 90:6, s. 668-669
  • Tidskriftsartikel (refereegranskat)abstract
    • A polymorphism in the coding region of the human cystatin D gene has been detected by direct sequencing of amplified DNA from different individuals. The variation, resulting from a T/C transition in exon 1 of the gene, causes an amino acid variation, Cys/Arg, at the protein level. An allele-specific oligonucleotide hybridization assay was developed and used to demonstrate this polymorphism in the population. The deduced frequencies were 0.55 and 0.45 for the Cys and Arg variant-encoding alleles, respectively.
  • Balbin, Milagros, et al. (författare)
  • Structural and functional characterization of two allelic variants of human cystatin D sharing a characteristic inhibition spectrum against mammalian cysteine proteinases
  • 1994
  • Ingår i: Journal of Biological Chemistry. - ASBMB. - 1083-351X. ; 269:37, s. 23156-23162
  • Tidskriftsartikel (refereegranskat)abstract
    • Human cystatin D is a novel member of the cystatin superfamily of cysteine proteinase inhibitors present in saliva and tears. Two alleles of the cystatin D gene (CST5), encoding protein variants with either Cys or Arg as residue 26 in their 122-residue polypeptide chains, are present in the population. Expression of the two alleles was investigated by immunochemical analyses of the secreted cystatin D in saliva from individuals homozygous for each of the two alleles, with results demonstrating that both are expressed at similar levels. The inhibitory characteristics of the two cystatin D variants were studied, by determination of dissociation equilibrium constants (Ki) for their complexes with papain and with the mammalian cysteine proteinases, cathepsins B, H, L, and S. The results demonstrate that 1) cystatin D has a characteristic inhibition profile since it does not inhibit cathepsin B (Ki > 1 microM), and when compared to cystatin C and all other known cystatins it is a much poorer inhibitor of cathepsin L (mean Ki 25 nM) but binds cathepsin H and S relatively tightly (mean Ki values of 8.5 and 0.24 nM, respectively); and 2) the inhibitory activities of the two cystatin D variants are not significantly different, demonstrating that the presence of an extra cysteine residue in the cystatin D molecule affects neither the stability nor the functional activity of the inhibitor, thus explaining the widespread distribution of the Cys26-cystatin D encoding allele in the population. The inhibitory properties displayed by cystatin D suggest that it has a function in saliva as inhibitor of either endogenous or exogenous enzymes with cathepsin S- or H-like properties.
  • Berndt, Sonja I., et al. (författare)
  • Genome-wide association study identifies multiple risk loci for chronic lymphocytic leukemia
  • 2013
  • Ingår i: Nature Genetics. - 1061-4036 .- 1546-1718. ; 45:8, s. 868-U202
  • Tidskriftsartikel (refereegranskat)abstract
    • Genome-wide association studies (GWAS) have previously identified 13 loci associated with risk of chronic lymphocytic leukemia or small lymphocytic lymphoma (CLL). To identify additional CLL susceptibility loci, we conducted the largest meta-analysis for CLL thus far, including four GWAS with a total of 3,100 individuals with CLL (cases) and 7,667 controls. In the meta-analysis, we identified ten independent associated SNPs in nine new loci at 10q23.31 (ACTA2 or FAS (ACTA2/FAS), P = 1.22 x 10(-14)), 18q21.33 (BCL2, P = 7.76 x 10(-11)), 11p15.5 (C11orf21, P = 2.15 x 10(-10)), 4q25 (LEF1, P = 4.24 x 10(-10)), 2q33.1 (CASP10 or CASP8 (CASP10/CASP8), P = 2.50 x 10(-9)), 9p21.3 (CDKN2B-AS1, P = 1.27 x 10(-8)), 18q21.32 (PMAIP1, P = 2.51 x 10(-8)), 15q15.1 (BMF, P = 2.71 x 10(-10)) and 2p22.2 (QPCT, P = 1.68 x 10(-8)), as well as an independent signal at an established locus (2q13, ACOXL, P = 2.08 x 10(-18)). We also found evidence for two additional promising loci below genome-wide significance at 8q22.3 (ODF1, P = 5.40 x 10(-8)) and 5p15.33 (TERT, P = 1.92 x 10(-7)). Although further studies are required, the proximity of several of these loci to genes involved in apoptosis suggests a plausible underlying biological mechanism.
  • Freije, José P, et al. (författare)
  • Human cystatin D: cDNA cloning, characterization of the E. coli expressed inhibitor, and identification of the native protein in saliva
  • 1993
  • Ingår i: Journal of Biological Chemistry. - ASBMB. - 1083-351X. ; 268:21, s. 15737-15744
  • Tidskriftsartikel (refereegranskat)abstract
    • A cDNA coding for cystatin D, a human member of the cystatin protein family, has been cloned after specific amplification of reverse- transcribed parotid gland RNA. After replacing the segment encoding the putative 20-residue signal peptide with one encoding the Escherichia coli OmpA leader sequence, the cDNA was expressed in E. coli. The isolated recombinant protein exhibited Ki values of 1.2 nM and > 1 microM for papain and cathepsin B, respectively. An antiserum raised against recombinant cystatin D recognized a protein in human saliva with electrophoretical mobility identical to that of the recombinant protein. Immunoenzymatic analysis revealed that this cysteine proteinase inhibitor is present in human saliva and tears at concentrations of 3.8 and 0.5 mg/liter, respectively, while it was not detected in seminal plasma, blood plasma, milk, or cerebrospinal fluid. Cystatin D purified from human saliva by immunosorption displayed a heterogeneous N-terminal end, with sequences starting at residues 5, 7, 9, and 11 of the predicted N-terminal portion of the mature protein. On the basis of structural and functional properties, cystatin D represents a novel cysteine proteinase inhibitor possibly playing a protective role against proteinases present in the oral cavity.
  • Freije, José P, et al. (författare)
  • Structure and expression of the gene encoding cystatin D, a novel human cysteine proteinase inhibitor
  • 1991
  • Ingår i: Journal of Biological Chemistry. - ASBMB. - 1083-351X. ; 266:30, s. 20538-20543
  • Tidskriftsartikel (refereegranskat)abstract
    • A new member of the human cystatin multigene family has been cloned from a genomic library using a cystatin C cDNA probe. The complete nucleotide sequence of a 4.3-kilobase DNA segment, containing a complete gene with structure very similar to those of known Family 2 cystatin genes, was determined. The novel gene, called CST4, is composed of three exons and two introns. It contains the coding information for a protein of 142 amino acid residues, which has been tentatively called cystatin D. The deduced amino acid sequence includes a putative signal peptide and presents 51-55% identical residues with the sequences of either cystatin C or the secretory gland cystatins S, SN, or SA. The cystatin D sequence contains all regions of relevance for cysteine proteinase inhibitory activity and also the 4 cysteine residues that form disulfide bridges in the other members of cystatin Family 2. Northern blot analysis revealed that the cystatin D gene is expressed in parotid gland but not in seminal vesicle, prostate, epididymis, testis, ovary, placenta, thyroid, gastric corpus, small intestine, liver, or gall-bladder tissue. This tissue-restricted expression is in marked contrast with the wider distribution of all the other Family 2 cystatins, since cystatin C is expressed in all these tissues and the secretory gland cystatins are present in saliva, seminal plasma, and tears. Cystatin D, being the first described member of a third subfamily within the cystatin Family 2, thus appears to have a distinct function in the body in contrast to other cystatins.
  • Mikkelsen, Tarjei, et al. (författare)
  • Initial sequence of the chimpanzee genome and comparison with the human genome
  • 2005
  • Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 437:7055, s. 69-87
  • Tidskriftsartikel (refereegranskat)abstract
    • Here we present a draft genome sequence of the common chimpanzee (Pan troglodytes). Through comparison with the human genome, we have generated a largely complete catalogue of the genetic differences that have accumulated since the human and chimpanzee species diverged from our common ancestor, constituting approximately thirty-five million single-nucleotide changes, five million insertion/deletion events, and various chromosomal rearrangements. We use this catalogue to explore the magnitude and regional variation of mutational forces shaping these two genomes, and the strength of positive and negative selection acting on their genes. In particular, we find that the patterns of evolution in human and chimpanzee protein-coding genes are highly correlated and dominated by the fixation of neutral and slightly deleterious alleles. We also use the chimpanzee genome as an outgroup to investigate human population genetics and identify signatures of selective sweeps in recent human evolution.
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