All OsHsf genes induced by oxidative stress were also induced by high temperature. On the other hand, induction of 6 and 1 OsHsf genes was noted to be exclusive to high and low temperature stresses, respectively. Seven OsHsf genes showed induced expression in selleck chemicals response to all the three stresses examined. While in silico promoter analysis showed that OsHsf genes contain upstream regulatory elements corresponding to different abiotic stresses, there was lack of correlation noted between the in silico profiling of the elements and their corresponding transcript expression patterns. Apart from stress inducibility, EST database suggests that various OsHsf genes are developmentally
regulated in diverse tissue types. (C) 2009 Elsevier Masson SAS. All rights reserved.”
“Background: A high level of genetic stability has been formerly identified in segments of the gene coding for the liver stage antigen-3 (LSA-3), a subunit vaccine candidate against Plasmodium falciparum. The exploration
of lsa-3 polymorphisms was extended to the whole sequence of this large antigen in 20 clinical isolates from four geographical areas; Senegal, Comoro islands, Brazil and Thailand.
Methods: The whole 4680 bp genomic sequence of lsa-3 was amplified by polymerase chain reaction and sequenced. The clinical isolate sequences were aligned on the sequence of the laboratory reference P. falciparum strain 3D7.
Results: The non-repeated sequence of lsa-3 was very well conserved with only a few allelic variations buy GKT137831 scattered along the sequence. Interestingly, a formerly identified immunodominant region, employed for the majority of pre-clinical vaccine development, was totally
conserved at the genetic level. The most significant variations observed were in PD-1/PD-L1 inhibitor the number and organization of tetrapeptide repeated units, but not in their composition, resulting in different lengths of these repeated regions. The shorter repeated regions were from Brazilian origin. A correlation between the geographical distribution of the parasites with single nucleotide polymorphisms was not detected.
Conclusion: The lack of correlation between allelic polymorphisms with a specific transmission pressure suggests that LSA-3 is a structurally constrained molecule. The unusual characteristics of the lsa-3 gene make the molecule an interesting candidate for a subunit vaccine against malaria.”
“The emergence of new infectious bronchitis virus (IBV) genotypes or serotypes along with the poor cross-protection observed among IBV serotypes have complicated the avian infectious bronchitis (IB) control programs in different geographic regions. In Cuba, the lack of genetic information regarding IBV and the increasing epidemiological importance of this virus in Cuban chicken flocks demand further characterization of IBV isolates. In the present work, studies of genetic diversity and phylogenetic relationships among recent IBV isolates from Cuban chicken flocks showing respiratory disorders were performed.