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RF32 | PSUN60 Bioactive Natriuretic Peptides Measured By Mass Spectrometry and Associations With BMI, Race, and Metabolic Markers

BACKGROUND: Natriuretic peptide (NP) hormones, atrial NP (ANP) and B-type NP (BNP), exert cardiovascular and metabolically protective effects. When measured by conventional immunoassay methods, NP levels are lower in obese, black, and insulin-resistant individuals, suggesting these groups may experi...

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Autores principales: Palacios, Julia, Gupta, Deepak K, Wei, Shouzuo D, Turgeon, Rachel, Reynolds, Cassandra F, Niswender, Kevin D, Brown, Nancy J, Wang, Thomas J, Ikizler, Talat Alp, Bachmann, Katherine N, Garner, Erica M
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9624773/
http://dx.doi.org/10.1210/jendso/bvac150.537
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author Palacios, Julia
Gupta, Deepak K
Wei, Shouzuo D
Turgeon, Rachel
Reynolds, Cassandra F
Niswender, Kevin D
Brown, Nancy J
Wang, Thomas J
Ikizler, Talat Alp
Bachmann, Katherine N
Garner, Erica M
author_facet Palacios, Julia
Gupta, Deepak K
Wei, Shouzuo D
Turgeon, Rachel
Reynolds, Cassandra F
Niswender, Kevin D
Brown, Nancy J
Wang, Thomas J
Ikizler, Talat Alp
Bachmann, Katherine N
Garner, Erica M
author_sort Palacios, Julia
collection PubMed
description BACKGROUND: Natriuretic peptide (NP) hormones, atrial NP (ANP) and B-type NP (BNP), exert cardiovascular and metabolically protective effects. When measured by conventional immunoassay methods, NP levels are lower in obese, black, and insulin-resistant individuals, suggesting these groups may experience a relative NP deficiency. However, immunoassay measurements are likely poor determinants of physiologically relevant NPs as the immunoassay inadvertently captures predominantly inactive truncated peptides due to poor specificity and rapid degradation of the bioactive form. We have developed and validated a novel ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) assay(1) that specifically measures bioactive BNP (BNPMS) and ANP (ANPMS). Relationships between bioactive NPs measured by mass spectrometry (MS) with BMI, race, and glucose metabolism are not well-understood. METHODS: We measured bioactive BNP and ANP using a novel UPLC-MS/MS assay in 26 veterans without heart failure, diabetes, or significant cardiac/pulmonary/renal/hepatic disease. We also determined BNP using conventional immunoassay (BNPia), age, sex, race, BMI, fasting glucose, and HbA1c. We assessed relationships of NPs with continuous variables using Spearman's correlation and multivariable linear regression, and with categorical variables using Wilcoxon rank-sum. RESULTS: Among 26 veterans (aged 25-55, 69% male), 8 were lean (BMI 23.1 +/- 1.4 kg/m(2)) and 18 were obese (BMI 34 +/- 2.9 kg/m(2)). ANPMS was negatively associated with BMI (rs=-0.59, p=0.0015). Moreover, when analyzed by BMI category, ANPMS was lower in obese compared with lean individuals (mean 113.9 +/- 74.9 vs. mean 220 +/- 173.7 pg/mL, respectively, p=0.020). BNPMS was lower in blacks; all 5 black individuals had undetectably low BNPMS (<5 pg/mL), whereas whites had a higher mean BNPMS (19.3 pg/mL, p=0.011). BNPMS was negatively associated with fasting glucose (p=0.03) in multivariable regression models adjusted for age, sex, race, and BMI. BNPMS was not significantly associated with BNPia, possibly partially due to the large percentage whose BNPMS and/or BNPia was undetectably low (44% and 56%, respectively) in this non-heart failure cohort. DISCUSSION: Using a novel UPLC-MS/MS technique, we found that ANPMS is lower in obesity, and BNPMS is lower in black individuals and in those with higher fasting glucose. Our results are consistent with relationships of NPs assessed by traditional immunoassay methods from large epidemiologic studies. Our findings are particularly striking as our sample size was relatively small compared with epidemiologic studies. Our analyses of bioactive NP levels by this specific methodology support the emerging hypothesis that obese and black individuals experience a relative NP deficiency. Future large-scale studies quantifying bioactive NPs by MS are warranted to refine the phenotyping of individuals with relative NP deficiency and determine whether relative NP deficiency contributes to greater cardiometabolic risk. (1)Reference: Dillon EM et al. Active BNP Measured by Mass Spectrometry and Response to Sacubitril/Valsartan. Journal of Cardiac Failure. 2021 Nov. Presentation: Sunday, June 12, 2022 12:30 p.m. - 2:30 p.m., Monday, June 13, 2022 1:12 p.m. - 1:17 p.m.
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spelling pubmed-96247732022-11-14 RF32 | PSUN60 Bioactive Natriuretic Peptides Measured By Mass Spectrometry and Associations With BMI, Race, and Metabolic Markers Palacios, Julia Gupta, Deepak K Wei, Shouzuo D Turgeon, Rachel Reynolds, Cassandra F Niswender, Kevin D Brown, Nancy J Wang, Thomas J Ikizler, Talat Alp Bachmann, Katherine N Garner, Erica M J Endocr Soc Cardiovascular Endocrinology BACKGROUND: Natriuretic peptide (NP) hormones, atrial NP (ANP) and B-type NP (BNP), exert cardiovascular and metabolically protective effects. When measured by conventional immunoassay methods, NP levels are lower in obese, black, and insulin-resistant individuals, suggesting these groups may experience a relative NP deficiency. However, immunoassay measurements are likely poor determinants of physiologically relevant NPs as the immunoassay inadvertently captures predominantly inactive truncated peptides due to poor specificity and rapid degradation of the bioactive form. We have developed and validated a novel ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) assay(1) that specifically measures bioactive BNP (BNPMS) and ANP (ANPMS). Relationships between bioactive NPs measured by mass spectrometry (MS) with BMI, race, and glucose metabolism are not well-understood. METHODS: We measured bioactive BNP and ANP using a novel UPLC-MS/MS assay in 26 veterans without heart failure, diabetes, or significant cardiac/pulmonary/renal/hepatic disease. We also determined BNP using conventional immunoassay (BNPia), age, sex, race, BMI, fasting glucose, and HbA1c. We assessed relationships of NPs with continuous variables using Spearman's correlation and multivariable linear regression, and with categorical variables using Wilcoxon rank-sum. RESULTS: Among 26 veterans (aged 25-55, 69% male), 8 were lean (BMI 23.1 +/- 1.4 kg/m(2)) and 18 were obese (BMI 34 +/- 2.9 kg/m(2)). ANPMS was negatively associated with BMI (rs=-0.59, p=0.0015). Moreover, when analyzed by BMI category, ANPMS was lower in obese compared with lean individuals (mean 113.9 +/- 74.9 vs. mean 220 +/- 173.7 pg/mL, respectively, p=0.020). BNPMS was lower in blacks; all 5 black individuals had undetectably low BNPMS (<5 pg/mL), whereas whites had a higher mean BNPMS (19.3 pg/mL, p=0.011). BNPMS was negatively associated with fasting glucose (p=0.03) in multivariable regression models adjusted for age, sex, race, and BMI. BNPMS was not significantly associated with BNPia, possibly partially due to the large percentage whose BNPMS and/or BNPia was undetectably low (44% and 56%, respectively) in this non-heart failure cohort. DISCUSSION: Using a novel UPLC-MS/MS technique, we found that ANPMS is lower in obesity, and BNPMS is lower in black individuals and in those with higher fasting glucose. Our results are consistent with relationships of NPs assessed by traditional immunoassay methods from large epidemiologic studies. Our findings are particularly striking as our sample size was relatively small compared with epidemiologic studies. Our analyses of bioactive NP levels by this specific methodology support the emerging hypothesis that obese and black individuals experience a relative NP deficiency. Future large-scale studies quantifying bioactive NPs by MS are warranted to refine the phenotyping of individuals with relative NP deficiency and determine whether relative NP deficiency contributes to greater cardiometabolic risk. (1)Reference: Dillon EM et al. Active BNP Measured by Mass Spectrometry and Response to Sacubitril/Valsartan. Journal of Cardiac Failure. 2021 Nov. Presentation: Sunday, June 12, 2022 12:30 p.m. - 2:30 p.m., Monday, June 13, 2022 1:12 p.m. - 1:17 p.m. Oxford University Press 2022-11-01 /pmc/articles/PMC9624773/ http://dx.doi.org/10.1210/jendso/bvac150.537 Text en © The Author(s) 2022. Published by Oxford University Press on behalf of the Endocrine Society. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
spellingShingle Cardiovascular Endocrinology
Palacios, Julia
Gupta, Deepak K
Wei, Shouzuo D
Turgeon, Rachel
Reynolds, Cassandra F
Niswender, Kevin D
Brown, Nancy J
Wang, Thomas J
Ikizler, Talat Alp
Bachmann, Katherine N
Garner, Erica M
RF32 | PSUN60 Bioactive Natriuretic Peptides Measured By Mass Spectrometry and Associations With BMI, Race, and Metabolic Markers
title RF32 | PSUN60 Bioactive Natriuretic Peptides Measured By Mass Spectrometry and Associations With BMI, Race, and Metabolic Markers
title_full RF32 | PSUN60 Bioactive Natriuretic Peptides Measured By Mass Spectrometry and Associations With BMI, Race, and Metabolic Markers
title_fullStr RF32 | PSUN60 Bioactive Natriuretic Peptides Measured By Mass Spectrometry and Associations With BMI, Race, and Metabolic Markers
title_full_unstemmed RF32 | PSUN60 Bioactive Natriuretic Peptides Measured By Mass Spectrometry and Associations With BMI, Race, and Metabolic Markers
title_short RF32 | PSUN60 Bioactive Natriuretic Peptides Measured By Mass Spectrometry and Associations With BMI, Race, and Metabolic Markers
title_sort rf32 | psun60 bioactive natriuretic peptides measured by mass spectrometry and associations with bmi, race, and metabolic markers
topic Cardiovascular Endocrinology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9624773/
http://dx.doi.org/10.1210/jendso/bvac150.537
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