Biomaterial Database

Chronic lymphocytic leukemia B cells express restricted sets of mutated and unmutated antigen receptors. 1998

F Fais, and F Ghiotto, and S Hashimoto, and B Sellars, and A Valetto, and S L Allen, and P Schulman, and V P Vinciguerra, and K Rai, and L Z Rassenti, and T J Kipps, and G Dighiero, and H W Schroeder, and M Ferrarini, and N Chiorazzi

Department of Medicine, North Shore University Hospital and New York University School of Medicine, Manhasset, New York 11030, USA.

To better understand the stage(s) of differentiation reached by B-type chronic lymphocytic leukemia (B-CLL) cells and to gain insight into the potential role of antigenic stimulation in the development and diversification of these cells, we analyzed the rearranged VH genes expressed by 83 B-CLL cells (64 IgM+ and 19 non-IgM+). Our results confirm and extend the observations of a bias in the use of certain VH, D, and JH genes among B-CLL cells. In addition, they indicate that the VH genes of approximately 50% of the IgM+ B-CLL cells and approximately 75% of the non-IgM+ B-CLL cells can exhibit somatic mutations. The presence of mutation varies according to the VH family expressed by the B-CLL cell (VH3 expressers displaying more mutation than VH1 and VH4 expressers). In addition, the extent of mutation can be sizeable with approximately 32% of the IgM+ cases and approximately 68% of the non-IgM+ cases differing by > 5% from the most similar germline gene. Approximately 20% of the mutated VH genes display replacement mutations in a pattern consistent with antigen selection. However, CDR3 characteristics (D and JH gene use and association and HCDR3 length, composition, and charge) suggest that selection for distinct B cell receptors (BCR) occurs in many more B-CLL cells. Based on these data, we suggest three prototypic BCR, representing the VH genes most frequently encountered in our study. These data suggest that many B-CLL cells have been previously stimulated, placing them in the "experienced" or "memory" CD5(+) B cell subset.

UI	MeSH Term	Description	Entries
D007075	Immunoglobulin M	A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin.	Gamma Globulin, 19S,IgM,IgM Antibody,IgM1,IgM2,19S Gamma Globulin,Antibody, IgM
D008969	Molecular Sequence Data	Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.	Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009154	Mutation	Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.	Mutations
D011947	Receptors, Antigen, B-Cell	IMMUNOGLOBULINS on the surface of B-LYMPHOCYTES. Their MESSENGER RNA contains an EXON with a membrane spanning sequence, producing immunoglobulins in the form of type I transmembrane proteins as opposed to secreted immunoglobulins (ANTIBODIES) which do not contain the membrane spanning segment.	Antigen Receptors, B-Cell,B-Cell Antigen Receptor,B-Cell Antigen Receptors,Surface Immunoglobulin,Immunoglobulins, Membrane-Bound,Immunoglobulins, Surface,Membrane Bound Immunoglobulin,Membrane-Bound Immunoglobulins,Receptors, Antigen, B Cell,Surface Immunoglobulins,Antigen Receptor, B-Cell,Antigen Receptors, B Cell,B Cell Antigen Receptor,B Cell Antigen Receptors,Bound Immunoglobulin, Membrane,Immunoglobulin, Membrane Bound,Immunoglobulin, Surface,Immunoglobulins, Membrane Bound,Membrane Bound Immunoglobulins,Receptor, B-Cell Antigen,Receptors, B-Cell Antigen
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000595	Amino Acid Sequence	The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.	Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D001402	B-Lymphocytes	Lymphoid cells concerned with humoral immunity. They are short-lived cells resembling bursa-derived lymphocytes of birds in their production of immunoglobulin upon appropriate stimulation.	B-Cells, Lymphocyte,B-Lymphocyte,Bursa-Dependent Lymphocytes,B Cells, Lymphocyte,B Lymphocyte,B Lymphocytes,B-Cell, Lymphocyte,Bursa Dependent Lymphocytes,Bursa-Dependent Lymphocyte,Lymphocyte B-Cell,Lymphocyte B-Cells,Lymphocyte, Bursa-Dependent,Lymphocytes, Bursa-Dependent
D001665	Binding Sites	The parts of a macromolecule that directly participate in its specific combination with another molecule.	Combining Site,Binding Site,Combining Sites,Site, Binding,Site, Combining,Sites, Binding,Sites, Combining
D015326	Gene Rearrangement, B-Lymphocyte, Heavy Chain	Ordered rearrangement of B-lymphocyte variable gene regions of the IMMUNOGLOBULIN HEAVY CHAINS, thereby contributing to antibody diversity. It occurs during the first stage of differentiation of the IMMATURE B-LYMPHOCYTES.	B-Cell Heavy Chain Gene Rearrangement,B-Lymphocyte Heavy Chain Gene Rearrangement,B-Lymphocyte Mu Chain Gene Rearrangement,B Cell Heavy Chain Gene Rearrangement,B Cell Mu Chain Gene Rearrangement,B Lymphocyte Heavy Chain Gene Rearrangement,B Lymphocyte Mu Chain Gene Rearrangement
D015451	Leukemia, Lymphocytic, Chronic, B-Cell	A chronic leukemia characterized by abnormal B-lymphocytes and often generalized lymphadenopathy. In patients presenting predominately with blood and bone marrow involvement it is called chronic lymphocytic leukemia (CLL); in those predominately with enlarged lymph nodes it is called small lymphocytic lymphoma. These terms represent spectrums of the same disease.	B-Cell Leukemia, Chronic,B-Lymphocytic Leukemia, Chronic,Chronic Lymphocytic Leukemia,Leukemia, B-Cell, Chronic,Leukemia, Lymphocytic, Chronic,Lymphocytic Leukemia, Chronic, B-Cell,Lymphoma, Small Lymphocytic,B-Cell Chronic Lymphocytic Leukemia,B-Cell Malignancy, Low-Grade,Diffuse Well-Differentiated Lymphocytic Lymphoma,Disrupted In B-Cell Malignancy,Leukemia, B Cell, Chronic,Leukemia, Chronic Lymphatic,Leukemia, Chronic Lymphocytic,Leukemia, Chronic Lymphocytic, B-Cell,Leukemia, Lymphoblastic, Chronic,Leukemia, Lymphocytic, Chronic, B Cell,Lymphoblastic Leukemia, Chronic,Lymphocytic Leukemia, Chronic,Lymphocytic Leukemia, Chronic, B Cell,Lymphocytic Lymphoma,Lymphocytic Lymphoma, Diffuse, Well Differentiated,Lymphocytic Lymphoma, Diffuse, Well-Differentiated,Lymphocytic Lymphoma, Well Differentiated,Lymphocytic Lymphoma, Well-Differentiated,Lymphoma, Lymphocytic,Lymphoma, Lymphocytic, Diffuse, Well Differentiated,Lymphoma, Lymphocytic, Diffuse, Well-Differentiated,Lymphoma, Lymphocytic, Well Differentiated,Lymphoma, Lymphocytic, Well-Differentiated,Lymphoma, Lymphoplasmacytoid, CLL,Lymphoma, Small Lymphocytic, Plasmacytoid,Lymphoma, Small-Cell,Lymphoplasmacytoid Lymphoma, CLL,Small-Cell Lymphoma,B Cell Chronic Lymphocytic Leukemia,B Cell Leukemia, Chronic,B Cell Malignancy, Low Grade,B Lymphocytic Leukemia, Chronic,B-Cell Leukemias, Chronic,B-Cell Malignancies, Low-Grade,B-Lymphocytic Leukemias, Chronic,CLL Lymphoplasmacytoid Lymphoma,CLL Lymphoplasmacytoid Lymphomas,Chronic B-Cell Leukemia,Chronic B-Cell Leukemias,Chronic B-Lymphocytic Leukemia,Chronic B-Lymphocytic Leukemias,Chronic Lymphatic Leukemia,Chronic Lymphatic Leukemias,Chronic Lymphoblastic Leukemia,Chronic Lymphoblastic Leukemias,Chronic Lymphocytic Leukemias,Diffuse Well Differentiated Lymphocytic Lymphoma,Disrupted In B Cell Malignancy,Leukemia, Chronic B-Cell,Leukemia, Chronic B-Lymphocytic,Leukemias, Chronic B-Cell,Leukemias, Chronic B-Lymphocytic,Leukemias, Chronic Lymphatic,Leukemias, Chronic Lymphoblastic,Low-Grade B-Cell Malignancies,Low-Grade B-Cell Malignancy,Lymphatic Leukemia, Chronic,Lymphatic Leukemias, Chronic,Lymphoblastic Leukemias, Chronic,Lymphocytic Leukemias, Chronic,Lymphocytic Lymphoma, Small,Lymphocytic Lymphomas,Lymphocytic Lymphomas, Small,Lymphocytic Lymphomas, Well-Differentiated,Lymphoma, CLL Lymphoplasmacytoid,Lymphoma, Small Cell,Lymphoma, Well-Differentiated Lymphocytic,Lymphomas, CLL Lymphoplasmacytoid,Lymphomas, Lymphocytic,Lymphomas, Small Lymphocytic,Lymphomas, Small-Cell,Lymphomas, Well-Differentiated Lymphocytic,Lymphoplasmacytoid Lymphomas, CLL,Malignancies, Low-Grade B-Cell,Malignancy, Low-Grade B-Cell,Small Cell Lymphoma,Small Lymphocytic Lymphoma,Small Lymphocytic Lymphomas,Small-Cell Lymphomas,Well-Differentiated Lymphocytic Lymphoma,Well-Differentiated Lymphocytic Lymphomas