Characterization of a natural model of adult mice with different rate of aging.

Judith Félix, Estefanía Díaz-Del Cerro, Antonio Garrido, Mónica De La Fuente

Department of Genetics, Physiology and Microbiology (Animal Physiology Unit), Faculty of Biological Sciences, Complutense University of Madrid, Spain; Institute of Investigation Hospital 12 Octubre (imas12), Madrid, Spain. Electronic address: [email protected]. · pubmed

Paper

Abstract

Aging is a heterogeneous process, so individuals of the same age may be aging at a different rate. A natural model of premature aging in mice have been proposed based on the poor response to the T-maze. Those that take longer to cross the intersection are known as Prematurely Aging Mice (PAM), while those that show an exceptional response are known as Exceptional non-PAM (E-NPAM), being the rest non-PAM (NPAM). Although many aspects of PAM and E-NPAM have been described, some aspects of their brain aging have not been studied. Similarly, it is known that PAM, NPAM and E-NPAM show a different rate of aging and longevity, but the differences between these three groups in behavior, immune function and oxidative-inflammatory state are unknown. The present study aims to deepen the study of brain aging in PAM and E-NPAM, and to study the differences in behavior, immunity, and oxidative-inflammatory state of peritoneal leukocytes between PAM, NPAM and E-NPAM. Results show deteriorated brains in PAM. Moreover, NPAM show an oxidative state similar to E-NPAM, an anxiety similar to PAM, and an intermediate immunity and lifespan between PAM and E-NPAM. In conclusion, immune function seems to be more associated with the longevity achieved.

The following analysis is generated by AI and may contain errors. It is separate from the authors’ abstract and is not peer review.

Research summary

The paper investigates differences in aging rates and associated biological factors in a natural mouse model, which is relevant to understanding the mechanisms of aging and longevity. However, the findings appear to be incremental and primarily descriptive, lacking novel insights that could significantly advance the field of longevity research. The focus on behavioral and immune differences among aging groups is interesting but does not address root causes or mechanisms of aging directly, limiting its overall impact.

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