SIRT7 could help explain why men and women age differently and also why certain diseases behave differently depending on biological sex. The protein was identified by an international team as a central piece in understanding these health and aging gaps.
The finding, published in Nature, was led by the Josep Carreras Institute in Barcelona and Mass General Brigham in Boston. According to the research, SIRT7 acts as a protector of genome and X chromosome stability, which is especially relevant in women, who have two copies of that chromosome, while men possess one.
SIRT7 and cellular aging
The researchers observed that the absence of SIRT7 alters genomic regulation, favors DNA damage, and generates more pronounced effects in women than in men. This molecular imbalance could help explain differences in health throughout life and open new avenues for studying cellular aging.
In experimental models, the loss of SIRT7 affected mechanisms linked to X chromosome inactivation, an essential process for balancing genetic activity between both sexes. When this system fails, some genes are overly silenced and others are anomalously activated.
SIRT7 and the X chromosome
The most relevant point of the study is that SIRT7 appears to protect the integrity of the active X chromosome and prevent genomic instability. This function is key in blood and immune cells, where small genetic flaws can have major consequences over time.
Additionally, the authors note that these results could be useful for better understanding hematological cancers, a group of diseases in which DNA alterations and the malignant transformation of cells carry decisive weight.
SIRT7 and health: what this finding adds
While the study does not by itself prove a single cause of differential aging between men and women, it does provide a concrete biological basis to investigate why certain diseases, resistance to cellular stress, and age-related decline do not manifest the same way in both sexes.
- SIRT7 protects genetic stability.
- SIRT7 participates in X chromosome regulation.
- SIRT7 could influence aging and certain diseases.
The research suggests that better understanding SIRT7 may be key to studying real biological differences between men and women.
In a field where gaps still persist regarding how biological sex modifies health, SIRT7 joins the list of factors that science will continue to examine in greater detail. If its clinical implications are confirmed, this protein could become a reference for future prevention, diagnosis, and treatment strategies, especially in aging-related diseases and hematological cancers.
