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Find video protocols related to scientific articles indexed in Pubmed.
Translocations activating IRF4 identify a subtype of germinal center-derived B-cell lymphoma affecting predominantly children and young adults.
Blood
PUBLISHED: 04-12-2011
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The prognosis of germinal center-derived B-cell (GCB) lymphomas, including follicular lymphoma and diffuse large-B-cell lymphoma (DLBCL), strongly depends on age. Children have a more favorable outcome than adults. It is not known whether this is because of differences in host characteristics, treatment protocols, or tumor biology, including the presence of chromosomal alterations. By screening for novel IGH translocation partners in pediatric and adult lymphomas, we identified chromosomal translocations juxtaposing the IRF4 oncogene next to one of the immunoglobulin (IG) loci as a novel recurrent aberration in mature B-cell lymphoma. FISH revealed 20 of 427 lymphomas to carry an IG/IRF4-fusion. Those were predominantly GCB-type DLBCL or follicular lymphoma grade 3, shared strong expression of IRF4/MUM1 and BCL6, and lacked PRDM1/BLIMP1 expression and t(14;18)/BCL2 breaks. BCL6 aberrations were common. The gene expression profile of IG/IRF4-positive lymphomas differed from other subtypes of DLBCL. A classifier for IG/IRF4 positivity containing 27 genes allowed accurate prediction. IG/IRF4 positivity was associated with young age and a favorable outcome. Our results suggest IRF4 translocations to be primary alterations in a molecularly defined subset of GCB-derived lymphomas. The probability for this subtype of lymphoma significantly decreases with age, suggesting that diversity in tumor biology might contribute to the age-dependent differences in prognosis of lymphoma.
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Mutation analysis of the TNFAIP3 (A20) tumor suppressor gene in CLL.
Int. J. Cancer
PUBLISHED: 01-25-2010
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Chronic lymphocytic leukemia (CLL) cells show constitutive nuclear factor kappa B (NF-?B) activation, which may have a pathogenetic role. The mechanisms causing this NF-?B activity are poorly understood. A20, encoded by the TNFAIP3 gene, is a repressor of the NF-?B pathway and was recently shown to be frequently inactivated by deletions and/or point mutations in several types of B-cell lymphomas. Here, we studied 48 CLL, including at least 12 cases with a deletion of one allele of TNFAIP3, for mutations. However, only one case harboured a silent mutation, all other cases were unmutated. Therefore, A20 inactivation plays no significant role in the pathogenesis of CLL, and the recurrent deletion in CLL on 6q21-23, where TNFAIP3 is located, likely affects other gene(s).
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First total synthesis of 1,2-dipalmitoyl-3-(N-palmitoyl-6-amino-6-deoxy-alpha-D-glucosyl)-sn-glycerol--a glycoglycerolipid of a marine alga with a high inhibitor activity against human Myt1-kinase.
Carbohydr. Res.
PUBLISHED: 03-16-2009
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The first total synthesis of 1,2-dipalmitoyl-3-(N-palmitoyl-6-amino-6-deoxy-alpha-D-glucosyl)-sn-glycerol, a glycoglycerolipid isolated from a marine alga extract, is described. Starting from alpha-methylglucopyranoside the multistep strategy allows the stereoselective synthesis of the final compound using various protective group procedures as well as derivatization of partial molecule domains. The latter offers the development of lead structures for inhibitors of human Myt1-kinase.
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What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

How does it work?

We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

Video X seems to be unrelated to Abstract Y...

In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.