2021
			
	    
	
	
    Higher-order connections between stereotyped subsets: implications for improved patient classification in CLL
AGATHANGELIDIS, A.; A. CHATZIDIMITRIOU; K. GEMENETZI; V. GIUDICELLI; M. KARYPIDOU et. al.Basic information
Original name
Higher-order connections between stereotyped subsets: implications for improved patient classification in CLL
	Authors
AGATHANGELIDIS, A.; A. CHATZIDIMITRIOU; K. GEMENETZI; V. GIUDICELLI; M. KARYPIDOU; Karla PLEVOVÁ (203 Czech Republic, belonging to the institution); Z. DAVIS; X.J. YAN; S. JEROMIN; C. SCHNEIDER; L.B. PEDERSEN; R.C. TSCHUMPER; L.A. SUTTON; P. BALIAKAS; L. SCARFO; E.J. VAN GASTEL; M. ARMAND; E. TAUSCH; B. BIDERMAN; C. BAER; D. BAGNARA; A. NAVARRO; A.L. DE SEPTENVILLE; V. GUIDO; G. MITTERBAUER-HOHENDANNER; A. DIMOVSKI; C. BRIEGHEL; S. LAWLESS; M. MEGGENDORFER; Kamila STRÁNSKÁ (203 Czech Republic, belonging to the institution); M. RITGEN; M. FACCO; C. TRESOLDI; A. VISENTIN; A. PATRIARCA; M. CATHERWOOD; L. BONELLO; A. SUDARIKOV; K. VANURA; M. ROUMELIOTI; H.S. FRANCOVA; T. MOYSIADIS; S. VERONESE; K. GIANNOPOULOS; L. MANSOURI; T. KARAN-DJURASEVIC; R. SANDALTZOPOULOS; C. BODOR; F. FAIS; A. KATER; I. PANOVSKA; D. ROSSI; S. ALSHEMMARI; P. PANAGIOTIDIS; P. COSTEAS; B. ESPINET; D. ANTIC; L. FORONI; M. MONTILLO; L. TRENTIN; N. STAVROYIANNI; G. GAIDANO; P.F. DI CELLE; C. NIEMANN; E. CAMPO; A. ANAGNOSTOPOULOS; C. POTT; K. FISCHER; M. HALLEK; D. OSCIER; S. STILGENBAUER; C. HAFERLACH; D. JELINEK; N. CHIORAZZI; Šárka POSPÍŠILOVÁ (203 Czech Republic, guarantor, belonging to the institution); M.P. LEFRANC; S. KOSSIDA; A.W. LANGERAK; Cx. BELESSI; F. DAVI; R. ROSENQUIST; P. GHIA and K. STAMATOPOULOS
			Edition
 Blood, Washington DC, USA, American Society of Hematology, 2021, 0006-4971
			Other information
Language
English
		Type of outcome
Article in a journal
		Field of Study
30205 Hematology
		Country of publisher
United States of America
		Confidentiality degree
is not subject to a state or trade secret
		References:
Impact factor
Impact factor: 25.669
			RIV identification code
RIV/00216224:14740/21:00120185
		Organization unit
Central European Institute of Technology
			UT WoS
000646099500016
		EID Scopus
2-s2.0-85102607193
		Keywords in English
B lymphocyte receptor; immunoglobulin; immunoglobulin heavy chain; immunoglobulin heavy chain
		Tags
International impact, Reviewed
		
				
				Changed: 22/12/2021 16:51, Mgr. Pavla Foltynová, Ph.D.
				
		Abstract
In the original language
Chronic lymphocytic leukemia (CLL) is characterized by the existence of subsets of patients with (quasi)identical, stereotyped B-cell receptor (BcR) immunoglobulins. Patients in certain major stereotyped subsets often display remarkably consistent clinicobiological profiles, suggesting that the study of BcR immunoglobulin stereotypy in CLL has important implications for understanding disease pathophysiology and refining clinical decision-making. Nevertheless, several issues remain open, especially pertaining to the actual frequency of BcR immunoglobulin stereotypy and major subsets, as well as the existence of higher-order connections between individual subsets. To address these issues, we investigated clonotypic IGHV-IGHD-IGHJ gene rearrangements in a series of 29 856 patients with CLL, by far the largest series worldwide. We report that the stereotyped fraction of CLL peaks at 41% of the entire cohort and that all 19 previously identified major subsets retained their relative size and ranking, while 10 new ones emerged; overall, major stereotyped subsets had a cumulative frequency of 13.5%. Higher-level relationships were evident between subsets, particularly for major stereotyped subsets with unmutated IGHV genes (U-CLL), for which close relations with other subsets, termed "satellites," were identified. Satellite subsets accounted for 3% of the entire cohort. These results confirm our previous notion that major subsets can be robustly identified and are consistent in relative size, hence representing distinct disease variants amenable to compartmentalized research with the potential of overcoming the pronounced heterogeneity of CLL. Furthermore, the existence of satellite subsets reveals a novel aspect of repertoire restriction with implications for refined molecular classification of CLL.
				Links
| LQ1601, research and development project | 
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| NV19-03-00091, research and development project | 
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