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Articles 511 - 530 of 530
Full-Text Articles in Medicine and Health Sciences
Signal Transducer And Activator Of Transcription (Stat)5 Activation By Bcr/Abl Is Dependent On Intact Src Homology (Sh)3 And Sh2 Domains Of Bcr/Abl And Is Required For Leukemogenesis., M Nieborowska-Skorska, M A Wasik, A Slupianek, P Salomoni, T Kitamura, B Calabretta, T Skorski
Signal Transducer And Activator Of Transcription (Stat)5 Activation By Bcr/Abl Is Dependent On Intact Src Homology (Sh)3 And Sh2 Domains Of Bcr/Abl And Is Required For Leukemogenesis., M Nieborowska-Skorska, M A Wasik, A Slupianek, P Salomoni, T Kitamura, B Calabretta, T Skorski
Department of Microbiology and Immunology Faculty Papers
Signal transducer and activator of transcription (STAT)5 is constitutively activated in BCR/ ABL-expressing cells, but the mechanisms and functional consequences of such activation are unknown. We show here that BCR/ABL induces phosphorylation and activation of STAT5 by a mechanism that requires the BCR/ABL Src homology (SH)2 domain and the proline-rich binding site of the SH3 domain. Upon expression in 32Dcl3 growth factor-dependent myeloid precursor cells, STAT5 activation-deficient BCR/ABL SH3+SH2 domain mutants functioned as tyrosine kinase and activated Ras, but failed to protect from apoptosis induced by withdrawal of interleukin 3 and/or serum and did not induce leukemia in severe combined …
Expression Of Constitutively Active Raf-1 In The Mitochondria Restores Antiapoptotic And Leukemogenic Potential Of A Transformation-Deficient Bcr/Abl Mutant., P Salomoni, M A Wasik, R F Riedel, K Reiss, J K Choi, T Skorski, B Calabretta
Expression Of Constitutively Active Raf-1 In The Mitochondria Restores Antiapoptotic And Leukemogenic Potential Of A Transformation-Deficient Bcr/Abl Mutant., P Salomoni, M A Wasik, R F Riedel, K Reiss, J K Choi, T Skorski, B Calabretta
Department of Microbiology and Immunology Faculty Papers
The oncogenic BCR/ABL protein protects hematopoietic cells from apoptosis induced by growth factor deprivation, but the mechanisms are only partially understood. A BCR/ABL mutant lacking amino acids 176-426 in the BCR domain (p185DeltaBCR) failed to protect interleukin 3-deprived 32Dcl3 myeloid precursor cells from apoptosis, although it possessed tyrosine kinase activity and was capable of activating the Ras-Raf-MAP kinase pathway. Compared to p185 wild-type transfectants, p185DeltaBCR-transfected cells showed markedly reduced levels of Bcl-2 and expressed the hypophosphorylated, proapoptotic form of BAD. Bcl-2 expression in the mitochondrial fraction of p185DeltaBCR cells was also markedly diminished and mitochondrial RAF was undetectable. In p185DeltaBCR …
Oncolog, Volume 43, Number 02, February 1998, Beth W. Allen, Alison Rufffin, Rebecca D. Pentz Ph.D.
Oncolog, Volume 43, Number 02, February 1998, Beth W. Allen, Alison Rufffin, Rebecca D. Pentz Ph.D.
OncoLog MD Anderson's Report to Physicians (All issues)
- Genetic findings prompt cancer survivor to elect surgery
- Protocols: Radiotherapy Protocols Offer Treatment for Range of Sites and Types of Cancer
- Radiation oncology: targeting effective treatment
- House Call: Cancer: Is it in the Genes or in the Stars?
- DiaLog: Genetic Tests Demand New Answers by Rebecca D. Pentz, PhD, Clinical Ethicist
Glanzmann Thrombasthenia. Cooperation Between Sequence Variants In Cis During Splice Site Selection., Ying Jin, Harry C. Dietz, Robert A. Montgomery, William R. Bell, Iain Mcintosh, Barry Coller, Paul F. Bray
Glanzmann Thrombasthenia. Cooperation Between Sequence Variants In Cis During Splice Site Selection., Ying Jin, Harry C. Dietz, Robert A. Montgomery, William R. Bell, Iain Mcintosh, Barry Coller, Paul F. Bray
Cardeza Foundation for Hematologic Research
Glanzmann thrombasthenia (GT), an autosomal recessive bleeding disorder, results from abnormalities in the platelet fibrinogen receptor, GP(IIb)-IIIa (integrin alpha(IIb)beta3). A patient with GT was identified as homozygous for a G-->A mutation 6 bp upstream of the GP(IIIa) exon 9 splice donor site. Patient platelet GP(IIIa) transcripts lacked exon 9 despite normal DNA sequence in all of the cis-acting sequences known to regulate splice site selection. In vitro analysis of transcripts generated from mini-gene constructs demonstrated that exon skipping occurred only when the G-->A mutation was cis to a polymorphism 116 bp upstream, providing precedence that two sequence variations …
Disruption Of The Cbfa2 Gene Causes Necrosis And Hemorrhaging In The Central Nervous System And Blocks Definitive Hematopoiesis., Qing Wang, Terryl Stacy, Michael M Binder, Miguel Marin-Padilla, Arlene H. Sharpe, Nancy A. Speck
Disruption Of The Cbfa2 Gene Causes Necrosis And Hemorrhaging In The Central Nervous System And Blocks Definitive Hematopoiesis., Qing Wang, Terryl Stacy, Michael M Binder, Miguel Marin-Padilla, Arlene H. Sharpe, Nancy A. Speck
Dartmouth Scholarship
The CBFA2 (AML1) gene encodes a DNA-binding subunit of the heterodimeric core-binding factor. The CBFA2 gene is disrupted by the (8;21), (3;21), and (12;21) chromosomal translocations associated with leukemias and myelodysplasias in humans. Mice lacking a CBF alpha 2 protein capable of binding DNA die between embryonic days 11.5 and 12.5 due to hemorrhaging in the central nervous system (CNS), at the nerve/CNS interfaces of cranial and spinal nerves, and in somitic/intersomitic regions along the presumptive spinal cord. Hemorrhaging is preceded by symmetric, bilateral necrosis in these regions. Definitive erythropoiesis and myelopoiesis do not occur in Cbfa2-deficient embryos, and disruption …
A Tandem Duplication Within The Fibrillin 1 Gene Is Associated With The Mouse Tight Skin Mutation., Linda D. Siracusa, Rodney Mcgrath, Qing Ma, John J. Moskow, Jayanthi Manne, Paul J. Christner, Arthur M. Buchberg, Sergio A. Jimenez
A Tandem Duplication Within The Fibrillin 1 Gene Is Associated With The Mouse Tight Skin Mutation., Linda D. Siracusa, Rodney Mcgrath, Qing Ma, John J. Moskow, Jayanthi Manne, Paul J. Christner, Arthur M. Buchberg, Sergio A. Jimenez
Department of Medicine Faculty Papers
Mice carrying the Tight skin (Tsk) mutation have thickened skin and visceral fibrosis resulting from an accumulation of extracellular matrix molecules. These and other connective tissue abnormalities have made Tskl + mice models for scleroderma, hereditary emphysema, and myocardial hypertrophy. Previously we localized Tsk to mouse chromosome 2 in a region syntenic with human chromosome 15. The microfibrillar glycoprotein gene, fibrillin 1 (FBN1), on human chromosome 15q, provided a candidate for the Tsk mutation. We now demonstrate that the Tsk chromosome harbors a 30- to 40-kb genomic duplication within the Fbn1 gene that results in a larger than normal in-frame …
A Requirement For Bone Morphogenetic Protein-7 During Development Of The Mammalian Kidney And Eye., Andrew T. Dudley, K. M. Lyons, E. J. Robertson
A Requirement For Bone Morphogenetic Protein-7 During Development Of The Mammalian Kidney And Eye., Andrew T. Dudley, K. M. Lyons, E. J. Robertson
Journal Articles: Genetics, Cell Biology & Anatomy
BMP-7/OP-1, a member of the transforming growth factor-beta (TGF-beta) family of secreted growth factors, is expressed during mouse embryogenesis in a pattern suggesting potential roles in a variety of inductive tissue interactions. The present study demonstrates that mice lacking BMP-7 display severe defects confined to the developing kidney and eye. Surprisingly, the early inductive tissue interactions responsible for establishing both organs appear largely unaffected. However, the absence of BMP-7 disrupts the subsequent cellular interactions required for their continued growth and development. Consequently, homozygous mutant animals exhibit renal dysplasia and anophthalmia at birth. Overall, these findings identify BMP-7 as an essential …
Subunit Dynamics In Escherichia Coli Preprotein Translocase., John C. Joly, Marilyn R. Leonard, William T. Wickner
Subunit Dynamics In Escherichia Coli Preprotein Translocase., John C. Joly, Marilyn R. Leonard, William T. Wickner
Dartmouth Scholarship
SecY, SecE, and band 1 copurify as the SecY/E integral membrane domain of Escherichia coli preprotein translocase. To measure the in vivo association of these polypeptides and assay possible exchange, plasmid-borne secY and secE genes were placed under control of the ara regulon and fused to DNA encoding the influenza hemagglutinin epitope. Cells were incubated with [35S]methionine, grown for a "chase" period, and then induced with arabinose to express epitope-tagged, nonradioactive SecY and SecE. Both the wild-type and epitope-tagged polypeptides assembled into functional, heterotrimeric SecY/E complex. However, immunoprecipitation with antibody to the epitope tag did not cross-precipitate radiolabeled SecY or …
Estimation Of The Incidence Of A Rare Genetic Disease Through A Two-Tier Mutation Survey., R Chakraborty, M R Srinivasan, S Raskin
Estimation Of The Incidence Of A Rare Genetic Disease Through A Two-Tier Mutation Survey., R Chakraborty, M R Srinivasan, S Raskin
Journal Articles
Recent attempts to detect mutations involving single base changes or small deletions that are specific to genetic diseases provide an opportunity to develop a two-tier mutation-screening program through which incidence of rare genetic disorders and gene carriers may be precisely estimated. A two-tier survey consists of mutation screening in a sample of patients with specific genetic disorders and in a second sample of newborns from the same population in which mutation frequency is evaluated. We provide the statistical basis for evaluating the incidence of affected and gene carriers in such two-tier mutation-screening surveys, from which the precision of the estimates …
Sequencing Of Cdna From 50 Unrelated Patients Reveals That Mutations In The Triple-Helical Domain Of Type Iii Procollagen Are An Infrequent Cause Of Aortic Aneurysms., Gerard Tromp, Yuli Wu, Darwin J. Prockop, Swarna L. Madhatheri, Caren Kleinert, James J. Earley, Jiapiao Zhuang, Orjan Norrgård, R. Clement Darling, William M. Abbott, C. William Cole, Pekka Jaakkola, Markku Ryynanen, William H. Pearce, James S.T. Yao, Kari Majamaa, Stanton N. Smullens, Zoran Gatalica, Robert E. Ferrell, Sergio A. Jimenez, Charles E. Jackson, Virginia V. Michels, Michael Kaye, Helena Kuivaniemi
Sequencing Of Cdna From 50 Unrelated Patients Reveals That Mutations In The Triple-Helical Domain Of Type Iii Procollagen Are An Infrequent Cause Of Aortic Aneurysms., Gerard Tromp, Yuli Wu, Darwin J. Prockop, Swarna L. Madhatheri, Caren Kleinert, James J. Earley, Jiapiao Zhuang, Orjan Norrgård, R. Clement Darling, William M. Abbott, C. William Cole, Pekka Jaakkola, Markku Ryynanen, William H. Pearce, James S.T. Yao, Kari Majamaa, Stanton N. Smullens, Zoran Gatalica, Robert E. Ferrell, Sergio A. Jimenez, Charles E. Jackson, Virginia V. Michels, Michael Kaye, Helena Kuivaniemi
Department of Biochemistry and Molecular Biology Faculty Papers
Detailed DNA sequencing of the triple-helical domain of type III procollagen was carried out on cDNA prepared from 54 patients with aortic aneurysms. The 43 male and 11 female patients originated from 50 different families and five different nationalities. 43 patients had at least one additional blood relative who had aneurysms. Five overlapping asymmetric PCR products, covering all the coding sequences of the triple-helical domain of type III procollagen, were sequenced with 28 specific sequencing primers. Analysis of the sequencing gels revealed only two nucleotide changes that altered the structure of the protein. One was a substitution of threonine for …
The Tight Skin Mouse: Demonstration Of Mutant Fibrillin-1 Production And Assembly Into Abnormal Microfibrils, Cay M. Kielty, Michael Raghunath, Linda D. Siracusa, Michael J. Sherratt, Reiner Peters, C. Adrian Shuttleworth, Sergio A. Jimenez
The Tight Skin Mouse: Demonstration Of Mutant Fibrillin-1 Production And Assembly Into Abnormal Microfibrils, Cay M. Kielty, Michael Raghunath, Linda D. Siracusa, Michael J. Sherratt, Reiner Peters, C. Adrian Shuttleworth, Sergio A. Jimenez
Selected Works of Sergio Jiménez, MD, MACR
Mice carrying the Tight skin (Tsk) mutation harbor a genomic duplication within the fibrillin-1 (Fbn 1) gene that results in a larger than normal in-frame Fbn 1 transcript. In this study, the consequences of the Tsk mutation for fibrillin-containing microfibrils have been examined. Dermal fibroblasts from Tsk/+ mice synthesized and secreted both normal fibrillin (approximately 330 kD) and the mutant oversized Tsk fibrillin-1 (approximately 450 kD) in comparable amounts, and Tsk fibrillin-1 was stably incorporated into cell layers. Immunohistochemical and ultrastructural analyses of normal and Tsk/+ mouse skin highlighted differences in the gross organization and distribution of microfibrillar arrays. Rotary …
Mechanisms Of Interference With Simian Virus 40 (Sv40) Dna Replication By Trans-Dominant Mutants Of Sv40 Large T Antigen, Christine M. Bentivoglio, Jiyue Zhu, Charles Cole
Mechanisms Of Interference With Simian Virus 40 (Sv40) Dna Replication By Trans-Dominant Mutants Of Sv40 Large T Antigen, Christine M. Bentivoglio, Jiyue Zhu, Charles Cole
Dartmouth Scholarship
Mutations at multiple sites within the simian virus 40 (SV40) early region yield large T antigens which interfere trans dominantly with the replicative activities of wild-type T antigen. A series of experiments were conducted to study possible mechanisms of interference with SV40 DNA replication caused by these mutant T antigens. First, the levels of wild-type T antigen expression in cells cotransfected with wild-type and mutant SV40 DNAs were examined; approximately equal levels of wild-type T antigen were seen, regardless of whether the cotransfected mutant was trans dominant or not. Second, double mutants that contained the mutation of inA2827, a strong …
Purification Of Core-Binding Factor, A Protein That Binds The Conserved Core Site In Murine Leukemia Virus Enhancers., Shuwen W. Wang, Nancy A. Speck
Purification Of Core-Binding Factor, A Protein That Binds The Conserved Core Site In Murine Leukemia Virus Enhancers., Shuwen W. Wang, Nancy A. Speck
Dartmouth Scholarship
The Moloney murine leukemia virus causes thymic leukemias when injected into newborn mice. A major genetic determinant of the thymic disease specificity of the Moloney virus genetically maps to two protein binding sites in the Moloney virus enhancer, the leukemia virus factor b site and the adjacent core site. Point mutations introduced into either of these sites significantly shifts the disease specificity of the Moloney virus from thymic leukemia to erythroleukemia (N. A. Speck, B. Renjifo, E. Golemis, T. Frederickson, J. Hartley, and N. Hopkins, Genes Dev. 4:233-242, 1990). We have purified several polypeptides that bind to the core site …
The Growth Of Simian Virus 40 (Sv40) Host Range/Adenovirus Helper Function Mutants In An African Green Monkey Cell Line That Constitutively Expresses The Sv40 Agnoprotein., Terryl P. Stacy, Michele Chamberlain, Susan Carswell, Charles N. Cole
The Growth Of Simian Virus 40 (Sv40) Host Range/Adenovirus Helper Function Mutants In An African Green Monkey Cell Line That Constitutively Expresses The Sv40 Agnoprotein., Terryl P. Stacy, Michele Chamberlain, Susan Carswell, Charles N. Cole
Dartmouth Scholarship
The simian virus 40 T-antigen carboxy-terminal mutants, dlA2459 and dlA2475, are cell line and temperature dependent for growth and plaque formation in monkey kidney cells. Although these mutants did form plaques on BSC-1 cells at 37 degrees C, they were about fivefold less efficient for plaque formation than wild-type simian virus 40. These mutants did not grow in CV-1 cells and did not synthesize agnoprotein in those cells. CV-1 cells which constitutively express the agnoprotein were permissive for mutant plaque formation. However, late mRNAs, virion proteins, and progeny virion yields did not accumulate to wild-type levels during mutant infection of …
Simian Virus 40 Host Range/Helper Function Mutations Cause Multiple Defects In Viral Late Gene Expression., Terryl Stacy, Michele Chamberlain, Charles N. Cole
Simian Virus 40 Host Range/Helper Function Mutations Cause Multiple Defects In Viral Late Gene Expression., Terryl Stacy, Michele Chamberlain, Charles N. Cole
Dartmouth Scholarship
Simian virus 40 (SV40) deletion mutants dlA2459 and dlA2475 express T antigens that lack the normal carboxy terminus. These mutants are called host range/helper function (hr/hf) mutants because they form plaques at 37 degrees C on BSC-1 and Vero monkey kidney cell lines but not on CV-1p monkey kidney cells. Wild-type SV40 can provide a helper function to permit growth of human adenoviruses in monkey kidney cells; the hr/hf mutants cannot. Progeny yields of hr/hf mutants are also cold sensitive in all cell lines tested. Patterns of viral macromolecular synthesis in three cell lines (Vero, BSC-1, and CV-1) at three …
Osteogenesis Imperfecta. The Position Of Substitution For Glycine By Cysteine In The Triple Helical Domain Of The Pro Alpha 1(I) Chains Of Type I Collagen Determines The Clinical Phenotype., Barbra J. Starman, David Eyre, Harry Charbonneau, Maria Harrylock, Mary Ann Weis, Lester Weiss, John M. Graham Jr., Peter H. Byers
Osteogenesis Imperfecta. The Position Of Substitution For Glycine By Cysteine In The Triple Helical Domain Of The Pro Alpha 1(I) Chains Of Type I Collagen Determines The Clinical Phenotype., Barbra J. Starman, David Eyre, Harry Charbonneau, Maria Harrylock, Mary Ann Weis, Lester Weiss, John M. Graham Jr., Peter H. Byers
Dartmouth Scholarship
Skin fibroblasts grown from three individuals with osteogenesis imperfecta (OI) each synthesized a population of normal type I collagen molecules and additional molecules that had one or two alpha 1(I) chains that contained a cysteine residue within the triple-helical domain, a region from which cysteine normally is excluded. The patients had very different phenotypes. One patient with OI type I had a population of alpha 1(I) chains in which glycine at position 94 of the triple helix was substituted by cysteine; a patient with OI type III had a population of alpha 1(I) chains in which glycine at position 526 …
Fine-Structure Analysis Of The Processing And Polyadenylation Region Of The Herpes Simplex Virus Type 1 Thymidine Kinase Gene By Using Linker Scanning, Internal Deletion, And Insertion Mutations., Fang Zhang, Roger M. Denome, Charles N. Cole
Fine-Structure Analysis Of The Processing And Polyadenylation Region Of The Herpes Simplex Virus Type 1 Thymidine Kinase Gene By Using Linker Scanning, Internal Deletion, And Insertion Mutations., Fang Zhang, Roger M. Denome, Charles N. Cole
Dartmouth Scholarship
Most eucaryotic mRNAs are polyadenylated. In higher eucaryotes, the sequence AATAAA is located 7 to 30 base pairs (bp) upstream from the site of processing and polyadenylation and is a critical part of the signal for processing and polyadenylation. Efficient cleavage and polyadenylation also require sequences downstream of polyadenylation sites. The herpes simplex virus type 1 thymidine kinase (tk) gene contains two copies of the AATAAA hexanucleotide and a GT box (18 of 19 consecutive residues are G or T) previously shown to be required for efficient processing and polyadenylation of tk mRNA (C. N. Cole and T. P. Stacy, …
Two Separable Functional Domains Of Simian Virus 40 Large T Antigen: Carboxyl-Terminal Region Of Simian Virus 40 Large T Antigen Is Required For Efficient Capsid Protein Synthesis., Joanne Tornow, Maryellen Polvino-Bodnar, George Santangelo, Charles N. Cole
Two Separable Functional Domains Of Simian Virus 40 Large T Antigen: Carboxyl-Terminal Region Of Simian Virus 40 Large T Antigen Is Required For Efficient Capsid Protein Synthesis., Joanne Tornow, Maryellen Polvino-Bodnar, George Santangelo, Charles N. Cole
Dartmouth Scholarship
The carboxyl-terminal portion of simian virus 40 large T antigen is essential for productive infection of CV-1 and CV-1p green monkey kidney cells. Mutant dlA2459, lacking 14 base pairs at 0.193 map units, was positive for viral DNA replication, but unable to form plaques in CV-1p cells (J. Tornow and C.N. Cole, J. Virol. 47:487-494, 1983). In this report, the defect of dlA2459 is further defined. Simian virus 40 late mRNAs were transcribed, polyadenylated, spliced, and transported in dlA2459-infected cells, but the level of capsid proteins produced in infected CV-1 green monkey kidney cells was extremely low. dlA2459 large T …
Uptake Of Branched-Chain Alpha-Keto Acids In Bacillus Subtilis, Barry J. Goldstein, Stanley A. Zahler
Uptake Of Branched-Chain Alpha-Keto Acids In Bacillus Subtilis, Barry J. Goldstein, Stanley A. Zahler
Department of Medicine Faculty Papers
Bacillus subtilis has a constitutive system for the uptake of alpha-keto-beta-methylvalerate, alpha-ketoisovalerate, and (probably) alpha-ketoisocaproate. A mutation, kauA1, which blocks the uptake of alpha-keto-beta-methylvalerate and alpha-ketoisovalerate, is located between metB and citK on the B. subtilis chromosome.
Abstracts Of Theses For Graduate Degrees
Abstracts Of Theses For Graduate Degrees
MCV/Q, Medical College of Virginia Quarterly
Medical College of Virginia, June, 1968. Summary includes: Studies on Sulfonamides: Physiochemical Properties in Relation to Biological Activity by Richard Charles Allen; The Incisures of Schmidt-Lanterman by Nabil A. Azzam; Loosely Linked Mutations Enhancing L-Arabinose Utilization in Escherichia coli B/r by Robert G. Bost; Induction of Fusion in Cultured Cells in the Presence of Para-influenza 3 Virus by Mildred Kaiser Fleetwood; Correlations Between Acid-Base Behavior and Ion Fluxes in Frog Skin by Ruth Torvik Friedman; The Mating Pattern of Five Strains of Drosophila equinoxialis by Ragnit Geeraets; The Intrinsic Back Musculature of Macaca mulatta by Robert M. George; Mechanical Effects …