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Busby-Whitehead J, Whitehead WE, Sperber AD, Palsson OS, Simrén M. The aging gut: Symptoms compatible with disorders of gut-brain interaction (DGBI) in older adults in the general population. J Am Geriatr Soc 2024; 72:479-489. [PMID: 37945291 DOI: 10.1111/jgs.18679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/02/2023] [Accepted: 10/15/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND Little is known about changes in gastrointestinal symptoms compatible with disorders of gut-brain interaction (DGBI) with increasing age at the population level. The objective of this study was to describe the patterns of DGBI in individuals 65 years of age and above and contrasting them with those of younger adults. METHODS A community sample of 6300 individuals ages 18 and older in the US, UK, and Canada completed an online survey. Quota-based sampling was used to ensure equal proportion of sex and age groups (40% aged 18-39, 40% aged 40-64, 20% aged 65+) across countries, and to control education distributions. The survey included the Rome IV Diagnostic Questionnaire for DGBI, demographic questions, questionnaires measuring overall somatic symptom severity and quality of life, and questions on healthcare utilization, medications, and surgical history. RESULTS We included 5926 individuals in our analyses; 4700 were 18-64 years of age and 1226 were ages 65+. Symptoms compatible with at least one DGBI were less prevalent in participants ages 65+ vs. ages 18-64 years (34.1% vs. 41.3%, p < 0.0001). For symptoms compatible with upper GI DGBI, lower prevalence for most disorders was noted in the 65+ group. For lower GI DGBI, a different pattern was seen. Prevalence was lower in ages 65+ for irritable bowel syndrome and anorectal pain, but no differences from younger participants for the disorders defined by abnormal bowel habits (constipation and/or diarrhea) were seen. Fecal incontinence was the only DGBI that was more common in ages 65+. Having a DGBI was associated with reduced quality of life, more severe non-GI somatic symptoms, and increased healthcare seeking, both in younger and older participants. CONCLUSION Symptoms compatible with DGBI are common, but most of these decrease in older adults at the population level, with the exception of fecal incontinence which increases. This pattern needs to be taken into account when planning GI health care for the growing population of older adults.
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Affiliation(s)
- Jan Busby-Whitehead
- Division of Geriatric Medicine, Department of Medicine and Center for Aging and Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - William E Whitehead
- Center for Functional Gastrointestinal and Motility Disorders, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Ami D Sperber
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Olafur S Palsson
- Center for Functional Gastrointestinal and Motility Disorders, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Magnus Simrén
- Center for Functional Gastrointestinal and Motility Disorders, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Molecular and Clinical Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
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Benner SE, Zhu X, Hussain S, Florman S, Eby Y, Fernandez RE, Ostrander D, Rana M, Ottmann S, Hand J, Price JC, Pereira MR, Wojciechowski D, Simkins J, Stosor V, Mehta SA, Aslam S, Malinis M, Haidar G, Massie A, Smith ML, Odim J, Morsheimer M, Quinn TC, Laird GM, Siliciano R, Balagopal A, Segev DL, Durand CM, Redd AD, Tobian AAR. HIV-Positive Liver Transplant Does not Alter the Latent Viral Reservoir in Recipients With Antiretroviral Therapy-Suppressed HIV. J Infect Dis 2023; 228:1274-1279. [PMID: 37379584 PMCID: PMC10629701 DOI: 10.1093/infdis/jiad241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/02/2023] [Accepted: 06/22/2023] [Indexed: 06/30/2023] Open
Abstract
The latent viral reservoir (LVR) remains a major barrier to HIV-1 curative strategies. It is unknown whether receiving a liver transplant from a donor with HIV might lead to an increase in the LVR because the liver is a large lymphoid organ. We found no differences in intact provirus, defective provirus, or the ratio of intact to defective provirus between recipients with ART-suppressed HIV who received a liver from a donor with (n = 19) or without HIV (n = 10). All measures remained stable from baseline by 1 year posttransplant. These data demonstrate that the LVR is stable after liver transplantation in people with HIV. Clinical Trials Registration. NCT02602262 and NCT03734393.
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Affiliation(s)
- Sarah E Benner
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Xianming Zhu
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Sarah Hussain
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Sander Florman
- Recanati/Miller Transplantation Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Yolanda Eby
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Reinaldo E Fernandez
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Darin Ostrander
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Meenakshi Rana
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Shane Ottmann
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jonathan Hand
- Department of Infectious Diseases, Ochsner Health, New Orleans, Louisiana, USA
| | - Jennifer C Price
- Department of Medicine, University of California San Francisco, San Francisco, California, USA
| | - Marcus R Pereira
- Department of Medicine, Columbia University Irving Medical Center, New York, New York, USA
| | - David Wojciechowski
- Division of Nephrology, University of Texas Southwestern, Dallas, Texas, USA
| | - Jacques Simkins
- Department of Medicine/Division of Infectious Diseases, University of Miami School of Medicine, Miami, Florida, USA
| | - Valentina Stosor
- Departments of Medicine and Surgery, Divisions of Infectious Diseases and Organ Transplantation, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Sapna A Mehta
- Department of Medicine, New York University Grossman School of Medicine, New York University Langone Health, New York, New York, USA
| | - Saima Aslam
- Department of Medicine, Division of Infectious Diseases and Global Public Health, University of California San Diego, La Jolla, California, USA
| | - Maricar Malinis
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Ghady Haidar
- Department of Medicine, Division of Infectious Diseases, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Allan Massie
- Department of Surgery, New York University Grossman School of Medicine, New York University Langone Health, New York, New York, USA
| | - Melissa L Smith
- Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, Kentucky, USA
| | - Jonah Odim
- Division of Extramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Megan Morsheimer
- Division of Extramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Thomas C Quinn
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
- Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | | | - Robert Siliciano
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Ashwin Balagopal
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Dorry L Segev
- Department of Surgery, New York University Grossman School of Medicine, New York University Langone Health, New York, New York, USA
| | - Christine M Durand
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Andrew D Redd
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
- Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Aaron A R Tobian
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
- Department of Medicine, Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
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Zheng S, Parikh RV, Tan TC, Pravoverov L, Patel JK, Horiuchi KM, Go AS. CKD stage-specific utility of two equations for predicting 1-year risk of ESKD. PLoS One 2023; 18:e0293293. [PMID: 37910454 PMCID: PMC10619781 DOI: 10.1371/journal.pone.0293293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 10/09/2023] [Indexed: 11/03/2023] Open
Abstract
BACKGROUND The Kidney Failure Risk Equation (KFRE) and Kaiser Permanente Northwest (KPNW) models have been proposed to predict progression to ESKD among adults with CKD within 2 and 5 years. We evaluated the utility of these equations to predict the 1-year risk of ESKD in a contemporary, ethnically diverse CKD population. METHODS We conducted a retrospective cohort study of adult members of Kaiser Permanente Northern California (KPNC) with CKD Stages 3-5 from January 2008-September 2015. We ascertained the onset of ESKD through September 2016, and calculated stage-specific estimates of model discrimination and calibration for the KFRE and KPNW equations. RESULTS We identified 108,091 eligible adults with CKD (98,757 CKD Stage 3; 8,384 CKD Stage 4; and 950 CKD Stage 5 not yet receiving kidney replacement therapy), with mean age of 75 years, 55% women, and 37% being non-white. The overall 1-year risk of ESKD was 0.8% (95%CI: 0.8-0.9%). The KFRE displayed only moderate discrimination for CKD 3 and 5 (c = 0.76) but excellent discrimination for CKD 4 (c = 0.86), with good calibration for CKD 3-4 patients but suboptimal calibration for CKD 5. Calibration by CKD stage was similar to KFRE for the KPNW equation but displayed worse calibration across CKD stages for 1-year ESKD prediction. CONCLUSIONS In a large, ethnically diverse, community-based CKD 3-5 population, both the KFRE and KPNW equation were suboptimal in accurately predicting the 1-year risk of ESKD within CKD stage 3 and 5, but more accurate for stage 4. Our findings suggest these equations can be used in1-year prediction for CKD 4 patients, but also highlight the need for more personalized, stage-specific equations that predicted various short- and long-term adverse outcomes to better inform overall decision-making.
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Affiliation(s)
- Sijie Zheng
- Department of Nephrology, Kaiser Permanente Oakland Medical Center, Oakland, California, United States of America
- Division of Research, Kaiser Permanente Northern California, Oakland, California, United States of America
- Department of Medicine, University of California, San Francisco, San Francisco, California, United States of America
| | - Rishi V. Parikh
- Division of Research, Kaiser Permanente Northern California, Oakland, California, United States of America
| | - Thida C. Tan
- Division of Research, Kaiser Permanente Northern California, Oakland, California, United States of America
| | - Leonid Pravoverov
- Department of Nephrology, Kaiser Permanente Oakland Medical Center, Oakland, California, United States of America
| | - Jignesh K. Patel
- Department of Nephrology, Kaiser Permanente Sacramento Medical Center, Sacramento, California, United States of America
| | - Kate M. Horiuchi
- Division of Research, Kaiser Permanente Northern California, Oakland, California, United States of America
| | - Alan S. Go
- Division of Research, Kaiser Permanente Northern California, Oakland, California, United States of America
- Department of Health Systems Science, Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, California, United States of America
- Departments of Epidemiology, Biostatistics and Medicine, University of California, San Francisco, San Francisco, California, United States of America
- Department of Medicine, Stanford University School of Medicine, Stanford, California, United States of America
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Tsay A, Wang JC. The Role of PIK3R1 in Metabolic Function and Insulin Sensitivity. Int J Mol Sci 2023; 24:12665. [PMID: 37628845 PMCID: PMC10454413 DOI: 10.3390/ijms241612665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/04/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
PIK3R1 (also known as p85α) is a regulatory subunit of phosphoinositide 3-kinases (PI3Ks). PI3K, a heterodimer of a regulatory subunit and a catalytic subunit, phosphorylates phosphatidylinositol into secondary signaling molecules involved in regulating metabolic homeostasis. PI3K converts phosphatidylinositol 4,5-bisphosphate (PIP2) to phosphatidylinositol 3,4,5-triphosphate (PIP3), which recruits protein kinase AKT to the inner leaflet of the cell membrane to be activated and to participate in various metabolic functions. PIK3R1 stabilizes and inhibits p110 catalytic activity and serves as an adaptor to interact with insulin receptor substrate (IRS) proteins and growth factor receptors. Thus, mutations in PIK3R1 or altered expression of PIK3R1 could modulate the activity of PI3K and result in significant metabolic outcomes. Interestingly, recent studies also found PI3K-independent functions of PIK3R1. Overall, in this article, we will provide an updated review of the metabolic functions of PIK3R1 that includes studies of PIK3R1 in various metabolic tissues using animal models, the mechanisms modulating PIK3R1 activity, and studies on the mutations of human PIK3R1 gene.
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Affiliation(s)
- Ariel Tsay
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, CA 94720, USA;
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Jen-Chywan Wang
- Metabolic Biology Graduate Program, University of California Berkeley, Berkeley, CA 94720, USA;
- Department of Nutritional Sciences & Toxicology, University of California Berkeley, Berkeley, CA 94720, USA
- Endocrinology Graduate Program, University of California Berkeley, Berkeley, CA 94720, USA
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Bloch EM, Zhu X, Krause PJ, Patel EU, Grabowski MK, Goel R, Auwaerter PG, Tobian AAR. Comparing the Epidemiology and Health Burden of Lyme Disease and Babesiosis Hospitalizations in the United States. Open Forum Infect Dis 2022; 9:ofac597. [PMID: 36467296 PMCID: PMC9709699 DOI: 10.1093/ofid/ofac597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022] Open
Abstract
Background Lyme disease (LD) and babesiosis are increasing in the United States. We sought to characterize and compare their epidemiology and health burden using a nationally representative sample of hospitalizations. Methods Data were extracted from the National Inpatient Sample (NIS) pertaining to LD and babesiosis for 2018 and 2019. The NIS is a comprehensive database of all-payer inpatient hospitalizations, representing a stratified systematic random sample of discharges from US hospitals. Patient demographics, clinical outcomes, and admission costs were evaluated, in addition to hospital-level variables (eg, location/teaching status and census division). Annual incidence of hospitalizations was calculated using US Census Bureau data. Results The annual incidence of hospitalizations of LD-related and babesiosis-related hospitalizations were 6.98 and 2.03 per 1 000 000 persons/year. Of the 4585 LD hospitalizations in 2018-2019, 60.9% were among male patients, 85.3% were White, and 39.0% were ≥60 years. Of the 1330 babesiosis hospitalizations in 2018-2019, 72.2% were among male patients, 78.9% were White, and 74.1% were ≥60 years; 70.0% of LD and 91.7% of babesiosis hospitalizations occurred in Middle Atlantic or New England. Lower disease severity was noted in 81.8% of LD hospitalizations compared with 49.3% of babesiosis hospitalizations, whereas those suffering from high severity were 2.3% and 6.0%, respectively. The mean hospital charges for LD and babesiosis hospitalizations were $33 440.8 and $40 689.8, respectively. Conclusions Despite overlap between the 2 diseases, LD has a broader geographic range and a greater number of hospital admissions, whereas babesiosis is more severe, incurring longer hospital stays, higher inpatient costs, and deaths.
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Affiliation(s)
- Evan M Bloch
- Correspondence: Evan M. Bloch, MBChB, MS, Associate Professor of Pathology, Associate Director, Transfusion Medicine, Department of Pathology, Johns Hopkins University, School of Medicine, 600 N. Wolfe Street, Carnegie 446 D1, Baltimore, MD 21287 ()
| | - Xianming Zhu
- Division of Transfusion Medicine, Department of Pathology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Peter J Krause
- Department of Epidemiology and Public Health, Yale School of Public Health and Yale School of Medicine, New Haven, Connecticut, USA
| | - Eshan U Patel
- Division of Transfusion Medicine, Department of Pathology, Johns Hopkins University, Baltimore, Maryland, USA
| | - M Kate Grabowski
- Division of Transfusion Medicine, Department of Pathology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Ruchika Goel
- Division of Transfusion Medicine, Department of Pathology, Johns Hopkins University, Baltimore, Maryland, USA
- Department of Internal Medicine, Simmons Cancer Institute at Southern Illinois University, Springfield, Illinois, USA
| | - Paul G Auwaerter
- Sherrilyn and Ken Fisher Center for Environmental Infectious Diseases, Division of Infectious Diseases, Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
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Zheng S, Yang J, Tan TC, Belani S, Law D, Pravoverov LV, Kim SS, Go AS. Dialysis therapy and mortality in older adults with heart failure and advanced chronic kidney disease: A high-dimensional propensity-matched cohort study. PLoS One 2022; 17:e0262706. [PMID: 35061809 PMCID: PMC8782375 DOI: 10.1371/journal.pone.0262706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/03/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Heart failure (HF) and chronic kidney disease (CKD) frequently coexist, and the combination is linked to poor outcomes, but limited data exist to guide optimal management. We evaluated the outcome of dialysis therapy in older patients with HF and advanced CKD. METHODS We examined adults aged ≥70 years with HF and eGFR ≤20 ml/min/1.73 m2 between 2008-2012 and no prior renal replacement therapy, cancer, cirrhosis or organ transplant. We identified patients who initiated chronic dialysis through 2013 and matched patients who did not initiate dialysis on age, gender, diabetes status, being alive on dialysis initiation date, and a high-dimensional propensity score for starting dialysis. Deaths were identified through 2013. We used Cox regression to evaluate the association of chronic dialysis and all-cause death. RESULTS Among 348 adults with HF and advanced CKD who initiated dialysis and 947 matched patients who did not start dialysis, mean age was 80±5 years, 51% were women and 33% were Black. The crude rate of death was high overall but lower in those initiating vs. not initiating chronic dialysis (26.1 vs. 32.1 per 100 person-years, respectively, P = 0.02). In multivariable analysis, dialysis was associated with a 33% (95% Confidence Interval:17-46%) lower adjusted rate of death compared with not initiating dialysis. CONCLUSIONS Among older adults with HF and advanced CKD, dialysis initiation was associated with lower mortality, but absolute rates of death were very high in both groups. Randomized trials should evaluate net outcomes of dialysis vs. conservative management on length and quality of life in this high-risk population.
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Affiliation(s)
- Sijie Zheng
- Department of Nephrology, Kaiser Permanente Oakland Medical Center, Oakland, CA, United States of America
- Department of Medicine, University of California, San Francisco, CA, United States of America
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, United States of America
| | - Jingrong Yang
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, United States of America
| | - Thida C. Tan
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, United States of America
| | - Sharina Belani
- Department of Nephrology, Kaiser Permanente San Rafael Medical Center, San Rafael, CA, United States of America
| | - David Law
- Department of Nephrology, Kaiser Permanente Oakland Medical Center, Oakland, CA, United States of America
| | - Leonid V. Pravoverov
- Department of Nephrology, Kaiser Permanente Oakland Medical Center, Oakland, CA, United States of America
| | - Susan S. Kim
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, United States of America
| | - Alan S. Go
- Department of Medicine, University of California, San Francisco, CA, United States of America
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, United States of America
- Department of Health System Sciences, Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, CA, United States of America
- Departments of Epidemiology and Biostatistics, University of California, San Francisco, CA, United States of America
- Departments of Medicine, Health Research and Policy, Stanford University School of Medicine, Palo Alto, CA, United States of America
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Appiah D, Lewis CE, Jacobs DR, Shikany JM, Quesenberry CP, Gross M, Carr J, Sidney S, Gunderson EP. The Association of Lactation Duration with Visceral and Pericardial Fat Volumes in Parous Women: The CARDIA Study. J Clin Endocrinol Metab 2021; 106:1821-1831. [PMID: 33524143 PMCID: PMC8118361 DOI: 10.1210/clinem/dgaa980] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Lactation is associated with lower risks for cardiovascular disease in women. Organ-related adiposity, which plays significant roles in the development of cardiometabolic diseases, could help explain this observation. We evaluated the association of lactation duration with visceral (VAT) and pericardial (PAT) fat volumes in women. METHODS Data were obtained from 910 women enrolled in the Coronary Artery Risk Development in Young Adults (CARDIA) study (1985-1986) without diabetes prior to pregnancy who had ≥1 birth during 25 years of follow-up and had VAT and PAT measured from computed tomographic scans in 2010-2011. Cumulative lactation duration across all births since baseline was calculated from self-reports collected at periodic exams. RESULTS At baseline, the average age of women (48% black, 52% white) was 24 ± 3.7 years. After controlling for baseline age, race, smoking status, body mass index, fasting glucose, family history of diabetes, fat intake, total cholesterol, physical activity, and follow-up covariates (parity, gestational diabetes), the mean fat volumes across categories of lactation [none (n = 221), 1-5 months (n = 306), 6-11 months (n = 210), and ≥12 months (n = 173)] were 122.0, 113.7 105.0, and 110.1 cm3 for VAT and 52.2, 46.7, 44.5, and 43.4 cm3 for PAT, respectively. Changes in body weight from the first post-baseline birth to the end of follow-up mediated 21% and 18% of the associations of lactation with VAT and PAT, respectively. CONCLUSIONS In this prospective study, longer cumulative lactation duration was associated with lower VAT and PAT volumes, with weight gain partially mediating these associations.
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Affiliation(s)
- Duke Appiah
- Department of Public Health, Texas Tech University Health Sciences Center, Lubbock, TX, USA
- Correspondence: Duke Appiah, Department of Public Health, Texas Tech University Health Sciences Center, 3601 4th Street, STOP 9430. Lubbock, TX 79430, USA.
| | - Cora E Lewis
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - David R Jacobs
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - James M Shikany
- Division of Preventive Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Myron Gross
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Jeff Carr
- Departments of Radiology, Biomedical Informatics, and Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Stephen Sidney
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA
| | - Erica P Gunderson
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA
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