2024-07-22T04:20:50Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/588192023-03-06T08:05:00Zcom_10324_32197com_10324_952com_10324_894col_10324_32199
Portillo de la Fuente, Ana María
Varela, E.
García Velasco, J.A.
2023-03-02T12:57:41Z
2023-03-02T12:57:41Z
2023
Mathematical Biosciences
Volume 358, 2023, 108985
0025-5564
https://uvadoc.uva.es/handle/10324/58819
10.1016/j.mbs.2023.108985
108985
Mathematical Biosciences
Producción Científica
A discrete model is proposed for the temporal evolution of a population of cells sorted according to their telomeric length. This model assumes that, during cell division, the distribution of the genetic material to daughter cells is asymmetric, i.e. chromosomes of one daughter cell have the same telomere length as the mother, while in the other daughter cell telomeres are shorter. Telomerase activity and cell death are also taken into account. The continuous model is derived from the discrete model by introducing the generational age as a continuous variable in , being the Hayflick limit, i.e. the number of times that a cell can divide before reaching the senescent state. A partial differential equation with boundary conditions is obtained. The solution to this equation depends on the initial telomere length distribution. The initial and boundary value problem is solved exactly when the initial distribution is of exponential type. For other types of initial distributions, a numerical solution is proposed. The model is applied to the human follicular growth from preantral to preovulatory follicle as a case study and the aging rate is studied as a function of telomerase activity, the initial distribution and the Hayflick limit. Young, middle and old cell-aged initial normal distributions are considered. In all cases, when telomerase activity decreases, the population ages and the smaller the value, the higher the aging rate becomes. However, the influence of these two parameters is different depending on the initial distribution. In conclusion, the worst-case scenario corresponds to an aged initial telomere distribution.
Ministerio de Ciencia e Innovación (PGC2018-101443-B-I00)
CDTI and FEDER (IDI-20190160 and IDI-20181240)
Instituto de Salud Carlos III (Spanish Government) (PI20/00252)
FINOX through FORWARD 2018-6 to E.V. and J.A.G.V. and by IVIRMA (2004-FIVI-041-MV; 1711-FIVI-111-MV; 1707-FIVI-084-MV; 1711-FIVI-112-MV; 2207-MAD-093-MV).
application/pdf
eng
Elsevier
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2023 The Authors
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Matemáticas
Telomere
Follicle
Aging
Partial differential equation
Telómero
Folículo
Envejecimiento
Ecuación diferencial parcial
12 Matemáticas
Influence of telomerase activity and initial distribution on human follicular aging: Moving from a discrete to a continuum model
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
https://www.sciencedirect.com/science/article/pii/S0025556423000263?via%3Dihub
SI