Results 11 to 20 of about 774,459 (219)

Autoantigen-B Cell Antigen Receptor Interactions That Regulate Expression of B Cell Antigen Receptor Loci [PDF]

The Journal of Immunology, 2007
Abstract Levels of AgR (BCR) expression are regulated during B cell development, activation, and induction of tolerance. The mechanisms responsible for and consequences of this regulation are poorly understood. We have described a class of DNA-based autoantigen-reactive B cell that down-regulates BCR expression during development to ...
Xiaohe, Liu, Lawrence J, Wysocki, Tim, Manser   +2 more
openaire   +2 more sources

Activation of the Rap1 GTPase by the B Cell Antigen Receptor [PDF]

Journal of Biological Chemistry, 1998
The B cell antigen receptor (BCR) activates Ras, a GTPase that promotes cell proliferation by activating the Raf-1/MEK/ERK signaling module and other signaling enzymes. In its active GTP-bound form, the Rap1 GTPase may act as a negative regulator of Ras-mediated signaling by sequestering Ras effectors (e.g., Raf-1) and preventing their activation.
McLeod, S.J., Ingham, R.J., Bos, J.L., Kurisaki, T., Gold, M.R.   +4 more
openaire   +3 more sources

Role of Specific B-Cell Receptor Antigens in Lymphomagenesis [PDF]

Frontiers in Oncology, 2020
The B-cell receptor (BCR) signaling pathway is a crucial pathway of B cells, both for their survival and for antigen-mediated activation, proliferation and differentiation. Its activation is also critical for the genesis of many lymphoma types. BCR-mediated lymphoma proliferation may be caused by activating BCR-pathway mutations and/or by active or ...
Lorenz Thurner, Sylvia Hartmann, Frank Neumann, Markus Hoth, Stephan Stilgenbauer, Ralf Küppers, Ralf Küppers, Klaus-Dieter Preuss, Moritz Bewarder   +8 more
openaire   +5 more sources

The B cell antigen receptor in B-cell development

Current Opinion in Immunology, 1994
During B-cell development, immature and mature forms of the B cell antigen receptor complex are deployed in a regulated fashion; thus, B cell antigen receptor complexes play essential roles in the transit of cells through ontogeny. The past year has seen progress in our understanding of how antigen receptor gene assembly is controlled and in defining ...
openaire   +2 more sources

Memory control by the B cell antigen receptor

Immunological Reviews, 2018
SummaryThe generation of memory B cells (MBCs) that have undergone immunoglobulin class switching from IgM, which dominates primary antibody responses, to other immunoglobulin isoforms is a hallmark of immune memory. Hence, humoral immunological memory is characterized by the presence of serum immunoglobulins of IgG subtypes known as the γ‐globulin ...
Niklas Engels, Jürgen Wienands
openaire   +3 more sources

Antigen footprint governs activation of the B cell receptor

Nature Communications, 2023
Abstract Antigen binding by B cell receptors (BCR) on cognate B cells elicits a response that eventually leads to production of antibodies. However, it is unclear what the distribution of BCRs is on the naïve B cell and how antigen binding triggers the first step in BCR signaling.
Alexey Ferapontov, Marjan Omer, Isabelle Baudrexel, Jesper Sejrup Nielsen, Daniel Miotto Dupont, Kristian Juul-Madsen, Philipp Steen, Alexandra S. Eklund, Steffen Thiel, Thomas Vorup-Jensen, Ralf Jungmann, Jørgen Kjems, Søren Egedal Degn   +12 more
openaire   +5 more sources

Claudin‐6 Protein Expression in Atypical Teratoid/Rhabdoid Tumors Is Strongly Enriched in the Molecular Subgroup AT/RT‐TYR

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Claudin‐6 has emerged as a promising immunotherapeutic target, yet protein‐level data in atypical teratoid/rhabdoid tumors (AT/RTs) have been inconsistent. We analyzed 36 well‐characterized AT/RT samples and found membranous claudin‐6 protein expression in 58% of cases, with striking enrichment in the molecular subgroup AT/RT‐TYR (100%) and ...
Victoria E. Fincke, Christian Thomas, Michael C. Frühwald, Pascal D. Johann, Martin Hasselblatt   +4 more
wiley   +1 more source

Emapalumab for Immune Effector Cell‐Associated Hemophagocytic Lymphohistiocytosis‐Like Syndrome Following CD19‐Directed CAR‐T in Two Patients With B‐ALL: Clinical and Biomarker Correlates

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Immune effector cell‐associated hemophagocytic lymphohistiocytosis‐like syndrome (IEC‐HS) is a life‐threatening hyperinflammatory toxicity distinct from cytokine release syndrome (CRS) and neurotoxicity following chimeric antigen receptor T‐cell (CAR‐T) therapy. In a single‐institution retrospective cohort of pediatric and young adult patients
Thomas J. Galletta, Jeremy D. Rubinstein, Christopher E. Dandoy, Ruby Khoury, Angela Faulhaber, Christine L. Phillips, Christa Krupski   +6 more
wiley   +1 more source

B‐cell antigen‐receptor signalling in lymphocyte development [PDF]

Immunology, 2003
SummarySignalling through the B‐cell antigen receptor (BCR) is required throughout B‐cell development and peripheral maturation. Targeted disruption of BCR components or downstream effectors indicates that specific signalling mechanisms are preferentially required for central B‐cell development, peripheral maturation and repertoire selection ...
Leo D, Wang, Marcus R, Clark
openaire   +2 more sources

The Role of Hematopoietic Cell Transplantation in Ataxia‐Telangiectasia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Ataxia‐telangiectasia (A‐T) is a DNA repair disorder characterized by neurodegeneration, immunodeficiency, and cancer predisposition. Hematopoietic cell transplantation (HCT) is an established therapy in related disorders such as Fanconi anemia (FA) and Nijmegen breakage syndrome (NBS), but its role in A‐T is unclear.
Laila Alkhouli, Seth Rotz, Masatoshi Takagi, Richa Sharma   +3 more
wiley   +1 more source