Assessing the impact of long-term storage on the quality and integrity of biological specimens in a reproductive biobank

Biobanks hold a pivotal role in facilitating translational and clinical research endeavors. However, the effects of prolonged storage on frozen blood samples analytes are not well defined yet. The aim of this study was to investigate the long-term stability of the quality of DNA, RNA, and endocrine markers within blood samples amassed from the biobank over the past 11 years. The results show that the overall quality and integrity of DNA remained not significantly influenced. However, RNA integrity and purity displayed substantial deterioration as storage duration increased, to ensure high-quality RNA for downstream analyses, advised to prioritize using blood samples stored within 3 years. Furthermore, the study examined the influence of storage time on endocrine markers. Through repeated measures ANOVA and linear regression analyses, it was evident that storage duration significantly influenced the levels of endocrine markers. This insight aids researchers in selecting appropriate markers for their investigations and augments the precision and dependability of results when dealing with long-term stored samples.