A Population Dynamics Model for Clonal Diversity in a Germinal Center
Germinal centers (GCs) are micro-domains where B cells mature to develop high affinity antibodies. Inside a GC, B cells compete for antigen and T cell help, and the successful ones continue to evolve. New experimental results suggest that, under identical conditions, a wide spectrum of clonal divers...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Frontiers Media S.A.
2017-09-01
|
Series: | Frontiers in Microbiology |
Subjects: | |
Online Access: | http://journal.frontiersin.org/article/10.3389/fmicb.2017.01693/full |
id |
doaj-9263e551fc53488eb6c8686da71b62b1 |
---|---|
record_format |
Article |
spelling |
doaj-9263e551fc53488eb6c8686da71b62b12020-11-24T23:07:36ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2017-09-01810.3389/fmicb.2017.01693280908A Population Dynamics Model for Clonal Diversity in a Germinal CenterAssaf Amitai0Assaf Amitai1Assaf Amitai2Luka Mesin3Gabriel D. Victora4Mehran Kardar5Arup K. Chakraborty6Arup K. Chakraborty7Arup K. Chakraborty8Arup K. Chakraborty9Chemical Engineering, Massachusetts Institute of TechnologyCambridge, MA, United StatesInstitute for Medical Engineering and Science, Massachusetts Institute of TechnologyCambridge, MA, United StatesRagon Institute of MGH, MIT and HarvardCambridge, MA, United StatesLaboratory of Lymphocyte Dynamics, Rockefeller UniversityNew York, NY, United StatesLaboratory of Lymphocyte Dynamics, Rockefeller UniversityNew York, NY, United StatesPhysics, Massachusetts Institute of TechnologyCambridge, MA, United StatesChemical Engineering, Massachusetts Institute of TechnologyCambridge, MA, United StatesInstitute for Medical Engineering and Science, Massachusetts Institute of TechnologyCambridge, MA, United StatesRagon Institute of MGH, MIT and HarvardCambridge, MA, United StatesBiological Engineering and Chemistry, Massachusetts Institute of TechnologyCambridge, MA, United StatesGerminal centers (GCs) are micro-domains where B cells mature to develop high affinity antibodies. Inside a GC, B cells compete for antigen and T cell help, and the successful ones continue to evolve. New experimental results suggest that, under identical conditions, a wide spectrum of clonal diversity is observed in different GCs, and high affinity B cells are not always the ones selected. We use a birth, death and mutation model to study clonal competition in a GC over time. We find that, like all evolutionary processes, diversity loss is inherently stochastic. We study two selection mechanisms, birth-limited and death limited selection. While death limited selection maintains diversity and allows for slow clonal homogenization as affinity increases, birth limited selection results in more rapid takeover of successful clones. Finally, we qualitatively compare our model to experimental observations of clonal selection in mice.http://journal.frontiersin.org/article/10.3389/fmicb.2017.01693/fullgerminal center reactionpopulation dynamicsmodeling and simulationsclonal evolutionaffinity maturation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Assaf Amitai Assaf Amitai Assaf Amitai Luka Mesin Gabriel D. Victora Mehran Kardar Arup K. Chakraborty Arup K. Chakraborty Arup K. Chakraborty Arup K. Chakraborty |
spellingShingle |
Assaf Amitai Assaf Amitai Assaf Amitai Luka Mesin Gabriel D. Victora Mehran Kardar Arup K. Chakraborty Arup K. Chakraborty Arup K. Chakraborty Arup K. Chakraborty A Population Dynamics Model for Clonal Diversity in a Germinal Center Frontiers in Microbiology germinal center reaction population dynamics modeling and simulations clonal evolution affinity maturation |
author_facet |
Assaf Amitai Assaf Amitai Assaf Amitai Luka Mesin Gabriel D. Victora Mehran Kardar Arup K. Chakraborty Arup K. Chakraborty Arup K. Chakraborty Arup K. Chakraborty |
author_sort |
Assaf Amitai |
title |
A Population Dynamics Model for Clonal Diversity in a Germinal Center |
title_short |
A Population Dynamics Model for Clonal Diversity in a Germinal Center |
title_full |
A Population Dynamics Model for Clonal Diversity in a Germinal Center |
title_fullStr |
A Population Dynamics Model for Clonal Diversity in a Germinal Center |
title_full_unstemmed |
A Population Dynamics Model for Clonal Diversity in a Germinal Center |
title_sort |
population dynamics model for clonal diversity in a germinal center |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Microbiology |
issn |
1664-302X |
publishDate |
2017-09-01 |
description |
Germinal centers (GCs) are micro-domains where B cells mature to develop high affinity antibodies. Inside a GC, B cells compete for antigen and T cell help, and the successful ones continue to evolve. New experimental results suggest that, under identical conditions, a wide spectrum of clonal diversity is observed in different GCs, and high affinity B cells are not always the ones selected. We use a birth, death and mutation model to study clonal competition in a GC over time. We find that, like all evolutionary processes, diversity loss is inherently stochastic. We study two selection mechanisms, birth-limited and death limited selection. While death limited selection maintains diversity and allows for slow clonal homogenization as affinity increases, birth limited selection results in more rapid takeover of successful clones. Finally, we qualitatively compare our model to experimental observations of clonal selection in mice. |
topic |
germinal center reaction population dynamics modeling and simulations clonal evolution affinity maturation |
url |
http://journal.frontiersin.org/article/10.3389/fmicb.2017.01693/full |
work_keys_str_mv |
AT assafamitai apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT assafamitai apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT assafamitai apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT lukamesin apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT gabrieldvictora apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT mehrankardar apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT arupkchakraborty apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT arupkchakraborty apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT arupkchakraborty apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT arupkchakraborty apopulationdynamicsmodelforclonaldiversityinagerminalcenter AT assafamitai populationdynamicsmodelforclonaldiversityinagerminalcenter AT assafamitai populationdynamicsmodelforclonaldiversityinagerminalcenter AT assafamitai populationdynamicsmodelforclonaldiversityinagerminalcenter AT lukamesin populationdynamicsmodelforclonaldiversityinagerminalcenter AT gabrieldvictora populationdynamicsmodelforclonaldiversityinagerminalcenter AT mehrankardar populationdynamicsmodelforclonaldiversityinagerminalcenter AT arupkchakraborty populationdynamicsmodelforclonaldiversityinagerminalcenter AT arupkchakraborty populationdynamicsmodelforclonaldiversityinagerminalcenter AT arupkchakraborty populationdynamicsmodelforclonaldiversityinagerminalcenter AT arupkchakraborty populationdynamicsmodelforclonaldiversityinagerminalcenter |
_version_ |
1725618118677495808 |