Biomedical subjects

Francisco J González

Publications and source records attributed to Francisco J González.

5 recordsLinked to original sources

PubMed2005

Proteomic analysis of secreted proteins from Trichoderma harzianum. Identification of a fungal cell wall-induced aspartic protease.

Trichoderma mycoparasitic activity depends on the secretion of complex mixtures of hydrolytic enzymes able to degrade the host cell wall. We have analysed the extracellular proteome secreted by T. harzianum CECT 2413 in the presence of different fungal cell walls. Significant differences were detected in 2DE maps, depending on the use of specific cell walls or chitin. A combination of MALDI-TOF and liquid chromatography mass spectrometry allowed the identification of a novel aspartic protease (P6281: MW 33 and pI 4.3) highly induced by fungal cell walls. A broad EST library from T. harzianum CECT 2413 was used to obtain the full-length sequence. The protein showed 44% identity with the polyporopepsin (EC 3.4.23.29) from the basidiomycete Irpex lacteus. Lower identity percentages were found with other pepsin-like proteases from filamentous fungi (<31%) and animals (<29%). Northern blot and promoter sequence analyses support the implication of the protease P6281 in mycoparasitism.

Amino Acid Sequence↗

PubMed2005

[Screening of the delta-F508 mutation and analysis of two Single Nucleotide Polymorphism of the CFTR gene, in a sample of the general population of Valparaíso, Chile].

BACKGROUND: The Cystic Fibrosis (CF) carrier rate in Chile was estimated to be 1/40. CF is caused by mutations in the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene. Delta F508 mutation is the most common in CF patients in Chile and worldwide. Delta F508 has linkage disequilibrium with two Single Nucleotide Polymorphisms (SNP), often used to define the haplotypic frameworks of CF mutations. AIM: To know the frequency of the delta F508 mutation and to establish the SNPs, M470V and T854T, haplotypic frequency, in a Valparaiso general population sample. SUBJECTS AND METHODS: Fifty subjects were studied. Genetic material was obtained from blood samples, amplified by PCR and analyzed by restriction fragment length polymorphism. RESULTS: Two of the 100 chromosomes analyzed, carried the delta F508 mutation. Therefore, the observed frequency carrier rate (0.02) was higher than the expected (0.01). Both carrier chromosomes had the same SNPs haplotypic framework (1-2). In normal chromosomes, the haplotype 2-1 was the most common. DISCUSSION: These results suggest that the chromosomes that bear delta F508 mutation have most likely a Mediterranean European origin, since this haplotypic framework has been reported in that region. We suggest that CF could be more common in Valparaiso than it was previously.

Base Sequence↗

PubMed2004

N-benzoyl-N'-alkylthioureas and their complexes with Ni(II), Co(III) and Pt(II) - crystal structure of 3-benzoyl-1-butyl-1-methyl-thiourea: activity against fungi and yeast.

The thiourea derivatives of N-butylmethylamine (3-benzoyl-1-butyl-1-methyl-thiourea) (1), N-ethylisopropylamine (3-benzoyl-1-ethyl-1-isopropyl-thiourea) (2) and the corresponding complexes of 1 and 2 with Ni(II), Co(III) and Pt(II) have been synthesized. The compounds obtained were characterized by elemental analysis, spectroscopic methods (FT-IR, UV-Vis and NMR) and mass spectrometry. Compound 1, crystallized in the triclinic space group. The antifungal activities of compounds 1 and 2 and their corresponding complexes against the fungus Penicillium digitatum and against the yeast Saccharomyces cerevisiae were investigated. In general, fungal growth inhibition was higher with compound 1 and its complexes than with compound 2, except for the Co(III) complex of 2.

Journal Article↗

PubMed2003

Hematologic and biochemical reference intervals for Spanish ibex.

We studied blood samples from 529 Spanish ibexes (Capra pyrenaica) from different Andalusian mountain ranges in southern Spain, primarily from Sierra Nevada. For each sample, 13 hematologic and 32 biochemical parameters were analyzed. Within this database, we selected values obtained from live, free-ranging, physically restrained, clinically normal animals to determine reference intervals for these parameters. Distribution of values within each parameter was determined and differences in values between sex and age classes also were determined. We found significant differences in eight biochemical parameters among male and female ibexes. Significant differences in values for 20 hematologic and biochemical parameters between age classes also were found.

Age Factors↗

PubMed2002

[Clinical and molecular genetic study of cystic fibrosis in the 5th Region of Chile].

BACKGROUND: Cystic fibrosis (CF) is the most common autosomal recessive disease in Caucasian population. More than 900 mutations have been detected in the Cystic Fibrosis Transmembrane Regulator (CFTR) gene. The most common worldwide, is a deletion of phenylalanine 508 (delta F508). AIM: To analyze the presence of mutations delta F508, G542X, N1303K, G551D, R553X and S549N in patients from the 5th Region of Chile, with a clinical diagnosis of CF. PATIENTS AND METHODS: We studied 17 non-related patients, presenting frequent respiratory tract infections, malabsorption and positive sweat tests, or meconial ileum. Serum immunoglobulins (IgG, IgA, IgM), and total, CD3+ and B-lymphocytes, were determined to discard the presence of an immune deficiency. The molecular study of the gene was performed by Polymerase Chain Reaction amplification and restriction analysis. RESULTS: Immunological parameters were normal in all patients. The delta F508 mutation was detected in 11 chromosomes and the mutation G542X in 3 chromosomes. CONCLUSIONS: The mutation G542X was the second most frequent mutation found in this sample of Chilean CF patients. Since this mutation has a high frequency in Spanish CF patients, we suggest that this mutation might have had its origin in Spain.

Adolescent↗