What are the secrets to a long and healthy Life?

Some families have the good fortune to live very
long lives . . .We want to know about those families!

Welcome to Long Life Family Study

The multicenter LLFS enrolled and studied a unique sample of 4,953 participants in 539 pedigrees in the USA and Denmark which are enriched for familial EL. Through two extensive in-home visits, approximately 8 years apart, these families possess key healthy aging phenotypes (HAPs) in major domains of the aging process (cognitive, cardiovascular, metabolic, inflammatory, etc.)

Further, the measured phenotypes are highly heritable cross-sectionally and longitudinally; however considerable familial phenotypic heterogeneity is present. To better understand this heterogeneity and the why and how these families are protected we will: conduct a third in-home visit with existing participants; recruit and enroll the grandchildren of the proband generation for their initial visit; combine linkage and association analyses to identify rare and lineage specific variants for cross-sectional and longitudinal HAPs and EL and their interaction with lifestyle exposures; perform comprehensive OMICs on LLFS pedigrees to discover biologic mechanisms leading to the heterogeneous familial patterns of HAPs and EL in LLFS pedigrees, and discover additional causal variants. Finally, we will combine all the data using systems biology and data integration to more comprehensively explain the biology of healthy aging.

The purpose of the LLFS is to study families in the United States and Denmark that are ALL enriched for exceptional longevity (EL). EL is a complex trait that is likely influenced by multiple genes with small effects interacting with lifetime exposures. The knowledge gained from studying these families will be in why and how they are protected and thus living exceptionally healthy long lives.

This project is supported by the National Institutes of Health’s National Institute on Aging, grant U19AG063893.

Alzheimer’s Disease Related Research Findings from LLFS

Xicota, Barral, and colleagues (https://pubmed.ncbi.nlm.nih.gov/38380866/) performed a genome wide search using the short read whole genome sequence (WGS) data from the LLFS dataset (n=3475) to understand the genetic contributions to delayed onset of late onset AD (LOAD) and confirmed the association in 6 external datasets (n=14,260). We identified several tightly linked SNPs in the MTUS2 gene (rs73154407, p = 7.6 × 10−9) that were significantly associated with LOAD, and the association of MTUS2 variants with LOAD was confirmed in 5 independent datasets. Subsequently, this study showed that the allelic association was stronger in those with high levels of Aβ42/40 ratio than in those with lower levels of Aβ42/40 ratio. This finding sheds light on AD biology in that MTUS2 encodes a microtubule associated protein implicated in the development and function of the nervous system, making it a plausible candidate to investigate LOAD biology.

Genes associated with physiological dysregulation may play a role in AD onset. Arbeev and colleagues (https://pubmed.ncbi.nlm.nih.gov/32235003/) found that genes associated with the age-related increase in physiological dysregulation (PD) frequently represented pathways implicated in axon guidance and synaptic function, which in turn were linked to AD and related traits (e.g., amyloid, tau, neurodegeneration). As a follow-up, Arbeev et al (https://pubmed.ncbi.nlm.nih.gov/37719713/)  then investigated the hypothesis that genes involved in PD and axon guidance/synapse function may jointly influence onset of AD. We found significant interactions between SNPs in the UNC5C and CNTN6, and PLXNA4 and EPHB2 genes that influenced AD onset in both datasets. Our findings suggest the joint contribution of genes involved in PD and axon guidance/synapse function (essential for the maintenance of complex neural networks) to AD development.

 

Welcome to Long Life Family Study

Kathryn Lunetta, PhD

Kathryn Lunetta, PhD

Biostatistician, Framingham Heart Study Liason

Contact

Phone: 617-358-2589

Email: klunetta@bu.edu

Isabelle Messina

Isabelle Messina

Research Specialist

Contact

Phone: 617-353-0963

Email: imessina@bu.edu

Vidhi Patel

Vidhi Patel

Research Specialist

Contact

Phone: 617-358-0094

Email: vidhi@bu.edu

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Lawrence S. Honig, MD, PhD

Lawrence S. Honig, MD, PhD

LLFS Morbidity and Mortality Adjudication; Telomeres in Aging; AD Biomarkers

Contact

Email: lh456@columbia.edu

Samantha Dargie, BS

Samantha Dargie, BS

Research Assistant

Contact

Phone: 646-819-3436

Email: sd3552@cumc.columbia.edu

R. Graham Barr, MD, DrPH

R. Graham Barr, MD, DrPH

LLFS Spirometry Reading Center and Training

Contact

Email: rgb9@cumc.columbia.edu

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Lars Hvidberg, MSc

Lars Hvidberg, MSc

Data Manager

Contact

Phone: +45 6550 3050

Email: lhvidberg@health.sdu.dk

Anita Hagelskær

Anita Hagelskær

Nurse, Site Coordinator

Contact

Phone: +45 65 50 41 52

Email: ahagelskaer@health.sdu.dk

Susanne Klojgaard, MA

Susanne Klojgaard, MA

IT Staff Member

Contact

Phone: +45 6550 3173

Email: sklojgaard@health.sdu.dk

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Emma Barinas-Mitchell, PhD

Emma Barinas-Mitchell, PhD

LLFS Co-Investigator; Director of the Ultrasound Reading Laboratory

Contact

Email: barinas@edc.pitt.edu

Pam Ruffing

Pam Ruffing

University of Pittsburgh Field Site Coordinator

Contact

Phone: 412-383-1306

Email: pcr12@pitt.edu

Nancy W. Glynn, PhD

Nancy W. Glynn, PhD

LLFS Co-Investigator; Director of LLFS Field Operations

Contact

Email: epidnwg@pitt.edu

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