摘要:
We found mutations of the R132 residue of isocitrate dehydrogenase 1 (IDH1) in the majority of grade II and III astrocytomas and oligodendrogliomas as well as in glioblastomas that develop from these lower grade lesions. Those tumors without mutations in IDH1 often had mutations at the analogous R172 residue of the closely related IDH2 gene. These findings have important implications for the pathogenesis and diagnosis of malignant gliomas.
摘要:
Phosphatidylinositol 3-kinases (PI3Ks) are known to be important regulators of signaling pathways. To determine whether PI3Ks are genetically altered in cancers, we analyzed the sequences of the P13K gene family and discovered that one family member, PIK3CA, is frequently mutated in cancers of the colon and other organs. The majority of mutations clustered near two positions within the P13K helical or kinase domains. PIK3CA represents one of the most highly mutated oncogenes yet identified in human cancers and is useful as a diagnostic and therapeutic target.
摘要:
The presently disclosed subject matter provides methods and kits for treating solid tumors in a subject by using a combination of anti-CTLA-4 and/or anti-PD-1 antibodies with at least one member of the group consisting of a bacterium, bacterial product, and an immunoregulatory entity. In particular embodiments, the bacteria are toxin-depleted, anaerobic bacteria, such as Clostridium novyi-NT.
摘要:
The identification of mutations that are present in a small fraction of DNA templates is essential for progress in several areas of biomedical research. Though massively parallel sequencing instruments are in principle well-suited to this task, the error rates in such instruments are generally too high to allow confident identification of rare variants. We here describe an approach that can substantially increase the sensitivity of massively parallel sequencing instruments for this purpose. One example of this approach, called "Safe-SeqS" for (Safe-Sequencing System) includes (i) assignment of a unique identifier (UID) to each template molecule; (ii) amplification of each uniquely tagged template molecule to create UID-families; and (iii) redundant sequencing of the amplification products. PCR fragments with the same UID are truly mutant ("super-mutants") if =95% of them contain the identical mutation. We illustrate the utility of this approach for determining the fidelity of a polymerase, the accuracy of oligonucleotides synthesized in vitro, and the prevalence of mutations in the nuclear and mitochondrial genomes of normal cells.
摘要:
During routine screening of a patient with a family history of colorectal cancer for truncating APC mutations, a novel missence mutation was identified. Upon further evaluation, it was found that 6 % of Ashkenazi Jews carry this mutation, and that it was present in ∩20 % of Ashkenazis with a family history of CRC. Probes, methods, and kits for identifying individuals affected with this missense mutation are provided.
摘要:
Inactivation of the APC tumor suppressor gene plays an important role in the development of both sporadic and familial forms of colorectal cancers. The majority of these mutations result in the loss of the carboxyl terminus of the APC protein. A cellular protein, EB1, that associates with the carboxyl terminus of APC both in vitro and in vivo has been identified. The EB1 gene is predicted to encode a 268 amino acid protein without significant homology to any protein with known function.