Synthesis of haemoglobin Wayne in erythroid cells.
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Erythrocytes↗
Biomedical subjects
S M Hanash
Publications and source records attributed to S M Hanash.
Mining protein data from two-dimensional gels: tools for systematic post-planned analyses.
There is a considerable need to develop comprehensive, systematic mechanisms to analyze the vast number of proteins that orchestrate various cellular functions and to identify proteins associated with disease or that are affected by pharmacological agents. Two-dimensional polyacrylamide gel electrophoresis (2-D PAGE) continues to be relied upon to analyze protein constituents of cells and tissues. We have developed a Laboratory Information Processing System (LIPS) as a computer-based tool for capturing quantitative and qualitative changes in thousands of proteins detected in 2-D gels of various types. Protein databases have been developed to serve as a repository for data processing of the basic and derived data and of findings derived from different studies. There have been remarkable advances both in database technology as well as in the computer hardware that have benefited our effort at mining protein data from 2-D gels. We here review our current efforts aimed at improving the performance and features of our 2-D related protein databases, with particular emphasis on the tools we utilize for database mining via a systematic analysis of information known as post-planned analysis.
Acrylic Resins↗
Overexpressed genes/ESTs and characterization of distinct amplicons on 17q23 in breast cancer cells.
17q23 is a frequent site of gene amplification in breast cancer. Several lines of evidence suggest the presence of multiple amplicons on 17q23. To characterize distinct amplicons on 17q23 and localize putative oncogenes, we screened genes and expressed sequence tags (ESTs) in existing physical and radiation hybrid maps for amplification and overexpression in breast cancer cell lines by semiquantitative duplex PCR, semiquantitative duplex RT-PCR, Southern blot, and Northern blot analyses. We identified two distinct amplicons on 17q23, one including TBX2 and another proximal region including RPS6KB1 (PS6K) and MUL. In addition to these previously reported overexpressed genes, we also identified amplification and overexpression of additional uncharacterized genes and ESTs, some of which suggest potential oncogenic activity. In conclusion, we have further defined two distinct regions of gene amplification and overexpression on 17q23 with identification of new potential oncogene candidates. Based on the amplification and overexpression patterns of known and as of yet unrecognized genes on 17q23, it is likely that some of these genes mapping to the discrete amplicons function as oncogenes and contribute to tumor progression in breast cancer cells.
Blotting, Northern↗
Quantitative analysis of a new marker for common acute lymphoblastic leukemia detected by two-dimensional electrophoresis.
A major subtype of childhood lymphoblastic leukemia has been previously defined on the basis of expression of a cell surface marker referred to as the common acute lymphoblastic leukemia antigen. In this study we provide evidence that leukemic cells from most of the patients with common acute lymphoblastic leukemia contain a cytosolic polypeptide designated L4, the occurrence of which is strongly correlated with the expression of the common acute lymphoblastic leukemia antigen. The detection and quantitation of L4 was accomplished by analysis of cellular polypeptides resolved by two-dimensional polyacrylamide gel electrophoresis. This approach provides a powerful tool for the delineation of distinct polypeptides corresponding to different types of leukemia and complements immunological analysis of the cell surface marker phenotype.
Antigens, Differentiation↗