2021
Higher-order immunoglobulin repertoire restrictions in CLL: the illustrative case of stereotyped subsets 2 and 169
GEMENETZI, K., F. PSOMOPOULOS, A. A. CARRILES, M. GOUNARI, C. MINICI et. al.Základní údaje
Originální název
Higher-order immunoglobulin repertoire restrictions in CLL: the illustrative case of stereotyped subsets 2 and 169
Autoři
GEMENETZI, K., F. PSOMOPOULOS, A. A. CARRILES, M. GOUNARI, C. MINICI, Karla PLEVOVÁ (203 Česká republika, domácí), LA SUTTON, M. TSAGIOPOULOU, P. BALIAKAS, K. PASENTSIS, A. ANAGNOSTOPOULOS, R. SANDALTZOPOULOS, R. ROSENQUIST, F. DAVI, Šárka POSPÍŠILOVÁ (203 Česká republika, domácí), P. GHIA, K. STAMATOPOULOS, M. DEGANO a A. CHATZIDIMITRIOU (garant)
Vydání
Blood, Washington DC, USA, American Society of Hematology, 2021, 0006-4971
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
30205 Hematology
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 25.476
Kód RIV
RIV/00216224:14740/21:00124275
Organizační jednotka
Středoevropský technologický institut
UT WoS
000646123500011
Klíčová slova anglicky
CLL; subsets 2 and 169; immunoglobulin
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 28. 2. 2022 16:45, Mgr. Pavla Foltynová, Ph.D.
Anotace
V originále
Chronic lymphocytic leukemia (CLL) major stereotyped subset 2 (IGHV3-21/IGLV3-21, similar to 2.5% of all cases of CLL) is an aggressive disease variant, irrespective of the somatic hypermutation (SHM) status of the clonotypic IGHV gene. Minor stereotyped subset 169 (IGHV3-48/IGLV3-21, similar to 0.2% of all cases of CLL) is related to subset 2, as it displays a highly similar variable antigen-binding site. We further explored this relationship through next-generation sequencing and crystallographic analysis of the clonotypic B-cell receptor immunoglobulin. Branching evolution of the predominant clonotype through intraclonal diversification in the context of ongoing SHM was evident in both heavy and light chain genes of both subsets. Molecular similarities between the 2 subsets were highlighted by the finding of shared SHMs within both the heavy and light chain genes in all analyzed cases at either the clonal or subclonal level. Particularly noteworthy in this respect was a ubiquitous SHM at the linker region between the variable and the constant domain of the IGLV3-21 light chains, previously reported as critical for immunoglobulin homotypic interactions underlying cell-autonomous signaling capacity. Notably, crystallographic analysis revealed that the IGLV3-21-bearing CLL subset 169 immunoglobulin retains the same geometry and contact residues for the homotypic intermolecular interaction observed in subset 2, including the SHM at the linker region, and, from a molecular standpoint, belong to a common structural mode of autologous recognition. Collectively, our findings document that stereotyped subsets 2 and 169 are very closely related, displaying shared immunoglobulin features that can be explained only in the context of shared functional selection.
Návaznosti
LQ1601, projekt VaV |
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