In this episode of Longevity by Design, host Dr. Gil Blander sits down with Dr. Paola Sebastiani, Professor of Biostatistics at Tufts Clinical and Translational Science Institute. They explore what centenarians reveal about reaching 100, and why there’s no single longevity gene.

Paola explains that studies keep finding many small genetic effects, which makes polygenic risk scores hard to use for personal prediction. She says progress depends on bigger cohorts and new analyses that include structural DNA changes and mitochondrial DNA. She also grounds the hype: for people born in 1900, only 0.2% of men and about 1% of women reached 100.

Healthspan sits at the center of the story. Paola ties exceptional aging to delayed disease, lower inflammation, and biomarker profiles that stay more youthful. She highlights diet as a realistic lever, with centenarians showing stable, balanced eating, steadier protein intake, and metabolite signals linked to vegetables and dark chocolate.

Guest-at-a-glance

💡 Name: Dr. Paola Sebastiani
💡 What they do: Professor of Biostatistics
💡 Company: Tufts Clinical and Translational Science Institute
💡 Noteworthy: She analyzes genetic, proteomic, and metabolomic data from centenarians to map longevity signatures, with a focus on APOE, inflammation, and delayed onset of age-related disease.
💡 Where to find her: https://www.linkedin.com/in/paola-sebastiani-5973a646

Episode highlights:

[00:00:00]: Introduction
[00:01:17]: Genetics and Longevity—Centenarian Studies
[00:03:17]: Genome-Wide Association Studies and Technological Advances
[00:04:20]: APOE, Genetic Variants, and Longevity Diversity
[00:05:58]: Polygenic Risk Scores and Longevity Prediction
[00:08:39]: Sample Sizes and Study Challenges in Longevity Research
[00:11:20]: Structural Variants, Mitochondrial DNA, and Data Sharing
[00:12:38]: Odds of Reaching Age 100—Historical Perspective
[00:15:22]: Healthspan, Compression of Morbidity, and Centenarian Quality of Life
[00:17:03]: Supercentenarians and Extreme Longevity
[00:21:02]: APOE Mechanisms, Inflammation, and Proteomic Signatures
[00:25:16]: Inflammation, Biomarkers, and Healthy Aging
[00:29:12]: Nutrition, Diet Balance, and Longevity
[00:32:28]: Food Versus Supplements—Practical Dietary Approaches
[00:35:02]: Molecular Profiles—Proteomics, Metabolomics, and Lipidomics
[00:39:01]: Gut Microbiome, Metabolomics, and Longevity Connections
[00:41:42]: Biological Pathways and Omics Insights in Centenarians
[00:45:01]: Protein Intake Patterns Across the Lifespan
[00:48:23]: Environmental Factors and Longevity
[00:50:18]: Physical Activity, Social Networks, and Objective Tracking
[00:53:45]: Offspring of Centenarians—Inheritance and Health Outcomes
[00:57:05]: Parental Longevity, Gender Differences, and Longevity Bias
[01:00:43]: Key Takeaways—Aging as a Positive Process
[01:03:25]: Closing Remarks and Episode Wrap-Up
[01:03:41]: End of Episode

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