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Biomedical subjects

A Carracedo

Publications and source records attributed to A Carracedo.

At least 127 records · Page 7Linked to original sources
PubMed1992

A report of an international collaborative experiment to demonstrate the uniformity obtainable using DNA profiling techniques.

This paper describes a collaborative exercise intended to demonstrate whether uniformity of DNA profile results could be achieved between different European laboratories. It was shown that this goal can be obtained provided that a common protocol is followed (specifically the use of a common electrophoretic buffer as being the most important parameter). Generally, lower molecular weight loci (with lower molecular weight fragments) such as YNH24 perform better than higher molecular weight loci such as MS43a. The results of the exercise are discussed in relation to the objectives of the European DNA profiling group (EDNAP).

Autoradiography↗
PubMed1992

Genetic markers in alcoholic liver cirrhosis.

11 genetic markers were typed in 157 individuals suffering from alcoholic cirrhosis, and compared with a random sample of healthy individuals. No significant differences were found for transferrin, specific group component, orosomucoid, esterase D, phosphogluconate dehydrogenase and adenylate kinase. Strong associations between alcoholic cirrhosis and alpha-1-antitrypsin PI*Z allele, haptoglobin HP*1 allele and acid phosphatase ACP AC phenotype were observed. The biological significance of these associations and their relationships with the development of alcoholic cirrhosis are also discussed.

Adult↗
PubMed1992

Isoelectric focusing of human hair keratins: correlation with sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) patterns and effect of cosmetic treatments.

A new isoelectric focusing (IEF) technique in polyacrylamide gels with 6M urea and 1.5% Nonidet P40 has been developed to characterize human hair samples. The phenotypes demonstrated with this procedure has been correlated with the sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) patterns described by other authors. The method described can be applied in the forensic science analysis of a single human hair. Using the same IEF technique we have studied the changes in electrophoretic patterns of cosmetically treated hair. The characteristics of the modifications observed and its utility in forensic science work are also discussed in this paper.

Detergents↗
PubMed1991

Electrophoretic human leukocyte antigen HLA-DQA1 DNA typing after polymerase chain reaction amplification.

An electrophoretic method (sodium dodecyl sulfate-polyacrylamide gel electrophoresis) is described which permits the identification of human leukocyte antigen HLA-DQA1 types and subtypes without using allele-specific oligonucleotide probes and dot-blot methodology. The procedure can be used in miniaturized gels in combination with automated electrophoretic systems. The PhastSystem is particularly recommended since temperature control is essential. HLA-DQA1*01 and DQA1*0301 can be distinguished in homoduplexes and DQA1*01 subtypes, DQA1*0201 and DQA1*0401 in heteroduplexes (in only 5 h including DNA extraction and PCR amplification). Additional variations to those recognized using commercially available dot-blot methods can be provided since this procedure permits the identification of single base-pair substitutions. In addition, this method is faster and less expensive than commercial methods.

Base Sequence↗
PubMed1990

Orosomucoid (ORM1 and ORM2) types in the Spanish Basque Country, Galicia and northern Portugal.

The genetic variation of orosomucoid (ORM1 and ORM2) in three south-western European populations (Galicia, Spanish Basque Country and northern Portugal) was investigated using hybrid isoelectric focusing. Three common ORM1 alleles were observed in these populations, the frequencies of ORM1 *S observed in Galicia and northern Portugal being the highest found among populations of European origin. Rare variants were observed for both the ORM1 and ORM2 loci.

Gene Frequency↗
PubMed1989

The use of hybrid isoelectric focusing for the detection of polymorphic proteins in blood stains.

alpha1-Antitrypsin (Pi), transferrin (Tf) and orosomucoid (ORM) were determined in bloodstain extracts by isoelectric focusing (IEF) with carrier ampholytes (CA) and also with a mixture of immobilines (HIEF). HIEF yields superior results from proteins typing in bloodstain extracts, since phenotypes are better distinguished and the bands are straighter and sharper. Also the sensitivity of HIEF is similar to IEF with CA.

Blood Stains↗
PubMed1988

Comparison between isoelectric focusing methods for the detection of orosomucoid phenotypes.

Orosomucoid (ORM) polymorphism was investigated by different methods including isoelectric focusing in acid pH ranges followed by silver staining, print immunofixation of desialyzed ORM, fixation using a lectin from the sea-weed Codium tomentosum, isoelectric focusing followed by immunofixation in miniaturized gels and isoelectric focusing in immobilized pH gradients. Population genetics studies were carried out in Galicia (NW Spain) and two new ORM variants were found.

Alleles↗
PubMed1988

Correlation between native and desialyzed forms of orosomucoid.

The correlation between ORM phenotypes in untreated serum and ORM phenotypes after isoelectric focusing of neuraminidase-treated serum is demonstrated. ORM subtypes were determined using isoelectric focusing in immobilized pH gradients. Population genetic studies of ORM polymorphism in the Galician population were also carried out.

Asialoglycoproteins↗
PubMed1987

Plasma protein and red cell enzyme groups in Galicia (north west Spain).

Galactose-1-phosphate uridyl transferase (GALT), esterase D (EsD), and plasminogen (PLG) phenotypes were determined by isoelectric focusing in thin-layer polyacrylamide gels (PAGIF) in a random sample from Galicia. Haptoglobins (Hp) were determined by conventional electrophoresis. The following gene frequencies were observed: for GALT: GALTN: 0.930; GALTD1: 0.044; GALTD2: 0.025; for EsD: EsD1: 0.874; EsD2: 0.104; EsD3: 0.021; for PLG: PLG1: 0.800; PLG2: 0.199; for Hp: Hp1: 0.426; Hp2: 0.573. Population data results of all electrophoretic markers typed until now in Galician population are also included.

Blood Proteins↗
PubMed1987

A simplified procedure for simultaneous detection of salivary proteins and its application in paternity testing.

An alternative simplified procedure for the genetic analysis of salivary protein complex (SPC) which eliminates the need for a specific concentrated parotid sample is proposed. After the technique is applied isoelectric focusing and protein detection is carried out by silver staining. The chance of exclusion of non-fathers for these systems in our population is 0.161711 for Pr, 0.07948 for Db, 0.07836 for Pa and 0.00995 for PIF. The total exclusion rate for these systems is 0.30042.

Alleles↗