Plasma Klotho and Frailty in Older Adults: Findings from the InCHIANTI Study

Michelle Shardell, Richard David Semba, Rita R. Kalyani, Stefania Bandinelli, Aric A. Prather, Chee W. Chia, Luigi Ferrucci

Research output: Contribution to journalArticle

Abstract

Background: The hormone klotho, encoded by the gene klotho, is primarily expressed in the kidney and choroid plexus of the brain. Higher klotho concentrations have been linked to better physical performance; however, it is unknown whether klotho relates to frailty status in older adults. Methods: Plasma klotho was measured in 774 participants aged ≤65 years enrolled in InCHIANTI, a prospective cohort study comprising Italian adults. Frailty status was assessed at 3 and 6 years after enrollment. Frailty was defined as presence of at least three out of five criteria of unintentional weight loss, exhaustion, sedentariness, muscle weakness, and slow walking speed; prefrailty was defined as presence of one or two criteria; and robustness was defined as zero criteria. We assessed whether plasma klotho concentrations measured at the 3-year visit related to frailty. Results: Each additional natural logarithm of klotho (pg/mL) was associated with lower odds of frailty versus robustness after adjustment for covariates (odds ratio [OR] 0.46; 95% confidence interval 0.21, 0.98; p-value =.045). Higher klotho was particularly associated with lower odds of exhaustion (OR 0.57; 95% CI 0.36, 0.89; p-value =.014). Participants with higher klotho also had lower estimated odds of weight loss and weakness, but these findings were not statistically significant. Conclusions: Higher plasma klotho concentrations were associated with lower likelihoods of frailty and particularly exhaustion. Future studies should investigate modifiable mechanisms through which klotho may affect the frailty syndrome.

Original languageEnglish (US)
Pages (from-to)1052-1058
Number of pages7
JournalJournals of Gerontology - Series A Biological Sciences and Medical Sciences
Volume74
Issue number7
DOIs
StatePublished - Jun 18 2019

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Weight Loss
Odds Ratio
Choroid Plexus
Muscle Weakness
Cohort Studies
Hormones
Prospective Studies
Confidence Intervals
Kidney
Brain
Genes
Walking Speed

Keywords

  • Biomarkers
  • Endocrinology
  • Epidemiology
  • Frailty syndrome

ASJC Scopus subject areas

  • Aging
  • Geriatrics and Gerontology

Cite this

Plasma Klotho and Frailty in Older Adults : Findings from the InCHIANTI Study. / Shardell, Michelle; Semba, Richard David; Kalyani, Rita R.; Bandinelli, Stefania; Prather, Aric A.; Chia, Chee W.; Ferrucci, Luigi.

In: Journals of Gerontology - Series A Biological Sciences and Medical Sciences, Vol. 74, No. 7, 18.06.2019, p. 1052-1058.

Research output: Contribution to journalArticle

Shardell, Michelle ; Semba, Richard David ; Kalyani, Rita R. ; Bandinelli, Stefania ; Prather, Aric A. ; Chia, Chee W. ; Ferrucci, Luigi. / Plasma Klotho and Frailty in Older Adults : Findings from the InCHIANTI Study. In: Journals of Gerontology - Series A Biological Sciences and Medical Sciences. 2019 ; Vol. 74, No. 7. pp. 1052-1058.
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abstract = "Background: The hormone klotho, encoded by the gene klotho, is primarily expressed in the kidney and choroid plexus of the brain. Higher klotho concentrations have been linked to better physical performance; however, it is unknown whether klotho relates to frailty status in older adults. Methods: Plasma klotho was measured in 774 participants aged ≤65 years enrolled in InCHIANTI, a prospective cohort study comprising Italian adults. Frailty status was assessed at 3 and 6 years after enrollment. Frailty was defined as presence of at least three out of five criteria of unintentional weight loss, exhaustion, sedentariness, muscle weakness, and slow walking speed; prefrailty was defined as presence of one or two criteria; and robustness was defined as zero criteria. We assessed whether plasma klotho concentrations measured at the 3-year visit related to frailty. Results: Each additional natural logarithm of klotho (pg/mL) was associated with lower odds of frailty versus robustness after adjustment for covariates (odds ratio [OR] 0.46; 95{\%} confidence interval 0.21, 0.98; p-value =.045). Higher klotho was particularly associated with lower odds of exhaustion (OR 0.57; 95{\%} CI 0.36, 0.89; p-value =.014). Participants with higher klotho also had lower estimated odds of weight loss and weakness, but these findings were not statistically significant. Conclusions: Higher plasma klotho concentrations were associated with lower likelihoods of frailty and particularly exhaustion. Future studies should investigate modifiable mechanisms through which klotho may affect the frailty syndrome.",
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AU - Shardell, Michelle

AU - Semba, Richard David

AU - Kalyani, Rita R.

AU - Bandinelli, Stefania

AU - Prather, Aric A.

AU - Chia, Chee W.

AU - Ferrucci, Luigi

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N2 - Background: The hormone klotho, encoded by the gene klotho, is primarily expressed in the kidney and choroid plexus of the brain. Higher klotho concentrations have been linked to better physical performance; however, it is unknown whether klotho relates to frailty status in older adults. Methods: Plasma klotho was measured in 774 participants aged ≤65 years enrolled in InCHIANTI, a prospective cohort study comprising Italian adults. Frailty status was assessed at 3 and 6 years after enrollment. Frailty was defined as presence of at least three out of five criteria of unintentional weight loss, exhaustion, sedentariness, muscle weakness, and slow walking speed; prefrailty was defined as presence of one or two criteria; and robustness was defined as zero criteria. We assessed whether plasma klotho concentrations measured at the 3-year visit related to frailty. Results: Each additional natural logarithm of klotho (pg/mL) was associated with lower odds of frailty versus robustness after adjustment for covariates (odds ratio [OR] 0.46; 95% confidence interval 0.21, 0.98; p-value =.045). Higher klotho was particularly associated with lower odds of exhaustion (OR 0.57; 95% CI 0.36, 0.89; p-value =.014). Participants with higher klotho also had lower estimated odds of weight loss and weakness, but these findings were not statistically significant. Conclusions: Higher plasma klotho concentrations were associated with lower likelihoods of frailty and particularly exhaustion. Future studies should investigate modifiable mechanisms through which klotho may affect the frailty syndrome.

AB - Background: The hormone klotho, encoded by the gene klotho, is primarily expressed in the kidney and choroid plexus of the brain. Higher klotho concentrations have been linked to better physical performance; however, it is unknown whether klotho relates to frailty status in older adults. Methods: Plasma klotho was measured in 774 participants aged ≤65 years enrolled in InCHIANTI, a prospective cohort study comprising Italian adults. Frailty status was assessed at 3 and 6 years after enrollment. Frailty was defined as presence of at least three out of five criteria of unintentional weight loss, exhaustion, sedentariness, muscle weakness, and slow walking speed; prefrailty was defined as presence of one or two criteria; and robustness was defined as zero criteria. We assessed whether plasma klotho concentrations measured at the 3-year visit related to frailty. Results: Each additional natural logarithm of klotho (pg/mL) was associated with lower odds of frailty versus robustness after adjustment for covariates (odds ratio [OR] 0.46; 95% confidence interval 0.21, 0.98; p-value =.045). Higher klotho was particularly associated with lower odds of exhaustion (OR 0.57; 95% CI 0.36, 0.89; p-value =.014). Participants with higher klotho also had lower estimated odds of weight loss and weakness, but these findings were not statistically significant. Conclusions: Higher plasma klotho concentrations were associated with lower likelihoods of frailty and particularly exhaustion. Future studies should investigate modifiable mechanisms through which klotho may affect the frailty syndrome.

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