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Swanson CM, Blatchford PJ, Stone KL, Cauley JA, Lane NE, Rogers-Soeder TS, Redline S, Bauer DC, Wright KP, Wierman ME, Kohrt WM, Orwoll ES. Sleep duration and bone health measures in older men. Osteoporos Int 2021; 32:515-527. [PMID: 32930851 PMCID: PMC7933119 DOI: 10.1007/s00198-020-05619-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 05/12/2020] [Accepted: 09/01/2020] [Indexed: 01/11/2023]
Abstract
UNLABELLED The associations between objective measures of sleep duration and bone outcomes in older men are unknown. No consistent, significant association was identified between sleep duration and bone mineral density (BMD) in the current analysis. However, future research should determine if vitamin D status modifies this relationship. INTRODUCTION Prior studies, predominantly in women, reported that long and short self-reported sleep duration are associated with lower BMD. Associations between actigraphy-determined sleep duration and BMD or bone turnover markers (BTMs) in older men are unknown. METHODS Men in The Osteoporotic Fractures in Men (MrOS) Study with wrist actigraphy and concurrent BMD assessment but without comorbidities affecting bone health were included. Sleep duration was considered as a continuous (N = 1926) and dichotomized variable where men were classified as getting the recommended (7-8 h/night; N = 478) or short (< 6 h/night; N = 577) sleep. The cross-sectional association between BMD, BTMs, and sleep duration was examined using a t test or linear regression, where appropriate, in unadjusted and adjusted models. RESULTS There were no clinically or statistically significant differences in BMD at the L-spine, total hip, or femoral neck between men getting the recommended vs. short sleep duration, using actigraphy or self-reported sleep duration (all p ≥ 0.07). When sleep duration was considered as a continuous variable, femoral neck BMD was higher in men with longer self-reported sleep duration (β = 0.006 ±0.003, p = 0.02), but this was not significant after further adjustment. In men with low 25OHD (< 20 ng/mL), longer actigraphy-determined sleep duration was associated with higher total hip BMD (β = 0.016 ± 0.008; p = 0.04). Sleep duration and BTMs were not associated. CONCLUSION Sleep duration was not associated with hip or L-spine BMD or BTMs in older men. Future research should determine if vitamin D status or other factors modify this relationship.
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Affiliation(s)
- C M Swanson
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado Anschutz Medical Campus, 12801 E. 17th Ave. Mail Stop 8106, Aurora, CO, 80045, USA.
| | - P J Blatchford
- Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, CO, USA
| | - K L Stone
- Research Institute, California Pacific Medical Center, San Francisco, CA, USA
- San Francisco Coordinating Center, University of California San Francisco, San Francisco, CA, USA
| | - J A Cauley
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - N E Lane
- Center for Musculoskeletal Health, University of California, Davis Health, Davis, CA, USA
| | | | - S Redline
- Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, MA, USA
- Division of Pulmonary Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - D C Bauer
- San Francisco Coordinating Center, University of California San Francisco, San Francisco, CA, USA
- University of California San Francisco Medical Center, San Francisco, CO, USA
| | - K P Wright
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado Anschutz Medical Campus, 12801 E. 17th Ave. Mail Stop 8106, Aurora, CO, 80045, USA
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, USA
| | - M E Wierman
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado Anschutz Medical Campus, 12801 E. 17th Ave. Mail Stop 8106, Aurora, CO, 80045, USA
- Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, CO, USA
| | - W M Kohrt
- Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Eastern Colorado VA Geriatric, Research, Education, and Clinical Center (GRECC), Aurora, CO, USA
| | - E S Orwoll
- Division of Endocrinology and Bone & Mineral Unit, Oregon Health & Science University, Portland, OR, USA
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Leary EB, Watson KT, Ancoli-Israel S, Redline S, Yaffe K, Ravelo LA, Peppard PE, Zou J, Goodman S, Mignot E, Stone KL. 0048 The Association Between REM Sleep and Risk of Mortality in Three Independent Cohorts. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Sleep disorders and sleep characteristics have been linked to higher risk of mortality. Despite the emerging evidence of a sleep-mortality association, the relationship between sleep architecture and mortality aren’t well understood. We hypothesize that reduced REM is associated with increased mortality risk.
Methods
The Osteoporotic Fractures in Men (MrOS) study is a population-based study of 2,675 older men. Cox regression was used to evaluate the association between %REM and mortality rate. Potential covariates were evaluated using 6-fold cross validation. Sensitivity analyses were performed to rule out alternative explanations. Wisconsin Sleep Cohort (WSC) and Sleep Heart Health Study (SHHS) data were used to replicate the findings.
Results
The MrOS sample mean age was 76.3 years (SD=5.51) and the median follow-up time was 12.1 years. There was a 13% higher rate of mortality for every absolute 5% reduction in REM sleep (HR=1.13, 95%CI, 1.08–1.19) after adjusting for multiple demographic, sleep, and health covariates. The association persisted for cardiovascular disease-related mortality (CVD) (HR=1.18, 95%CI, 1.09–1.28), cancer-related mortality (HR=1.14, 95%CI, 1.03–1.26), and other mortality (HR=1.19, 95%CI, 1.10–1.28). The WSC included 45.7% women. The mean age of the 1,388 individuals analyzed was 51.5 (SD=8.5); the median follow-up time was 20.8 years. The effect size for 5% reduction in REM on rate of all-cause mortality was similar in this cohort despite the younger age, inclusion of women, and longer follow-up period (HR=1.17, 95%CI, 1.03–1.34). SHHS data is still being analyzed; however the unadjusted model is consistent with the other cohorts.
Conclusion
We found an association between reduced REM and mortality in two, possibly three independent cohorts, which persisted across different causes of death and multiple sensitivity analyses. Mechanistic studies are needed and strategies to preserve REM may influence clinical therapies and reduce mortality risk.
Support
NHLBI provides funding for the MrOS Sleep ancillary study “Outcomes of Sleep Disorders in Older Men” under grant numbers: R01 HL071194, R01 HL070848, R01 HL070847, R01 HL070842, R01 HL070841, R01 HL070837, R01 HL070838, and R01 HL070839. Wisconsin Sleep Cohort was supported by R01HL62252, RR03186, and R01AG14124 from the NIH. Dr. Redline was partially supported by NHLBI R35 HL135818.
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Affiliation(s)
| | | | | | - S Redline
- Brigham and Women’s Hospital, Boston, MA
| | - K Yaffe
- University of California, San Francisco, San Francisco, CA
| | - L A Ravelo
- University of Wisconsin-Madison, Madison, WI
| | - P E Peppard
- University of Wisconsin-Madison, Madison, WI
| | - J Zou
- Stanford University, Palo Alto, CA
| | | | - E Mignot
- Stanford University, Palo Alto, CA
| | - K L Stone
- University of California, San Francisco, San Francisco, CA
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Miner B, Vaz Fragoso CA, Han L, Yaggi HK, Redeker NS, Stone KL. 0852 Geriatric Health Conditions And The Combined Outcome Of Poor Sleep Quality With Objective Short Sleep Duration. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Poor sleep quality with objective short sleep duration (≤6 hours) is a high-risk phenotype. The associations of geriatric health conditions with this sleep phenotype have not been described.
Methods
Using data on 3,127 older women from the Study of Osteoporotic Fractures (SOF), mean age 84 years, and 3,058 older men from the Osteoporotic Fractures in Men Sleep Study (MrOS), mean age 76 years, we evaluated cross-sectional associations between geriatric health conditions and the combined outcome of poor sleep quality with actigraphic short sleep duration. Geriatric health conditions included cognitive impairment (modified MMSE score 1.5SD below the cohort mean value), physical impairment (inability to do a chair stand), falls (≥2 in past year), and vision impairment (acuity ≤20/40). Poor sleep quality was defined by Pittsburgh Sleep Quality Index (PSQI) score >5 and short sleep duration by average total sleep time ≤6 hours from wrist actigraphy (averaged over ~5 days). Women (SOF) and men (MrOS) were evaluated separately and multivariate logistic regression models also included age, race, education, comorbidities (medical, psychiatric, and primary sleep disorders), and medication use.
Results
Poor sleep quality with actigraphic short sleep duration was present in 475 (15.6%) men and 400 (13.1%) women. In men, the unadjusted odds of having combined poor sleep quality with actigraphic short sleep duration were statistically higher with cognitive impairment (OR=1.45 [CI 1.05, 1.98]), physical impairment (2.90 [1.87, 4.51]), and falls (1.97 [1.48, 2.62]). In women, the unadjusted odds of having combined poor sleep quality with actigraphic short sleep duration were statistically higher with physical impairment (1.54 [1.16, 2.04]) and falls (1.63 [1.21, 2.20]). However, these associations were no longer statistically significant in adjusted models (men and women).
Conclusion
Older persons with geriatric health conditions are more likely to have the combined phenotype of poor sleep quality with actigraphic short sleep duration, but this association is likely explained by comorbidity and medication use.
Support
Dr. Miner is supported by the Yale Claude D. Pepper Older Americans Independence Center (P30AG021342), the American Academy of Sleep Medicine Foundation, a foundation of the American Academy of Sleep Medicine, and the National Institute on Aging T32AG019134.
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Affiliation(s)
- B Miner
- Yale University School of Medicine, New Haven, CT
| | | | - L Han
- Yale University School of Medicine, New Haven, CT
| | - H K Yaggi
- Yale University School of Medicine, New Haven, CT
| | | | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA
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Miner B, Vaz Fragoso CA, Han L, Stone KL, Redeker NS, Yaggi HK. 0855 Primary Sleep Disorders And The Combined Outcome Of Poor Sleep Quality With Objective Short Sleep Duration In Older Persons. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Introduction
Poor sleep quality with short sleep duration (SSD) is a high-risk phenotype that is likely to be associated with primary sleep disorders (obstructive sleep apnea [OSA], periodic limb movements of sleep [PLMS], and restless legs syndrome [RLS]) in older persons. We evaluated the associations among primary sleep disorders and this high-risk phenotype in older persons.
Methods
Using data on 3,058 men from the Osteoporotic Fractures in Men Sleep Study and 3,127 women from the Study of Osteoporotic Fractures, mean ages 76 and 84 years, respectively, we evaluated cross-sectional associations between primary sleep disorders and the combined outcome of poor sleep quality with actigraphic SSD. In women, OSA and RLS were evaluated by self-report. In men, OSA and PLMS were evaluated by polysomnography and RLS by self-report. Poor sleep quality was defined by Pittsburgh Sleep Quality Index score >5 and SSD by average total sleep time ≤6 hours from wrist actigraphy (averaged over ~5 days). Men and women were evaluated separately. Multivariate logistic regression models also included demographics, self-reported chronic conditions, anxiety, depression, and medication use.
Results
Poor sleep quality with actigraphic SSD was more prevalent in men (475 [15.6%]) than women (400 [13.1%]). In unadjusted models in men, odds of poor sleep quality with actigraphic SSD were significantly higher with OSA, PLMS, and RLS (ORs [95% Cis] = 1.99 [1.57, 2.52], 2.11 [1.41, 3.18], and 5.58 [2.51, 12.43], respectively). In multivariable models in men, odds of poor sleep quality with actigraphic SSD were significantly higher with OSA (1.59 [1.18, 2.14]) but not with PLMS or RLS. In unadjusted models in women, odds of poor sleep quality with actigraphic SSD were significantly higher with OSA (3.57 [0.40, 31.88]) and RLS (5.60 [3.04, 10.32]), but results were not significant in multivariable models in women.
Conclusion
Older persons with primary sleep disorders have higher odds of poor sleep quality with actigraphic SSD. However, the predominant mechanisms underlying this high-risk phenotype may be driven more by medical and psychiatric comorbidity than by primary sleep disorders.
Support
The American Academy of Sleep Medicine Foundation and the Yale Claude D. Pepper Older Americans Independence Center
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Affiliation(s)
- B Miner
- Yale University School of Medicine, New Haven, CT
| | | | - L Han
- Yale University School of Medicine, New Haven, CT
| | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA
| | | | - H K Yaggi
- Yale University School of Medicine, New Haven, CT
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Wallace ML, Lee S, Hall MH, Stone KL, Langsetmo L, Redline S, Schousboe JT, Ensrud K, LeBlanc ES, Buysse DJ. Heightened sleep propensity: a novel and high-risk sleep health phenotype in older adults. Sleep Health 2019; 5:630-638. [PMID: 31678177 PMCID: PMC6993140 DOI: 10.1016/j.sleh.2019.08.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 05/04/2019] [Revised: 07/12/2019] [Accepted: 08/01/2019] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To reveal sleep health phenotypes in older adults and examine their associations with time to 5-year all-cause and cardiovascular mortality. DESIGN Prospective longitudinal cohorts. SETTING The Study of Osteoporotic Fractures and Outcomes of Sleep Disorders in Older Men Study. PARTICIPANTS N = 1722 men and women aged ≥65 years matched 1:1 on sociodemographic and clinical measures. MEASUREMENTS Self-reported habitual sleep health characteristics (satisfaction, daytime sleepiness, timing, efficiency, and duration) measured at an initial visit and longitudinal follow-up for mortality. RESULTS Latent class analysis revealed 3 sleep health phenotypes: (1) heightened sleep propensity (HSP; medium to long duration, high sleepiness, high efficiency/satisfaction; n = 322), (2) average sleep (AS; medium duration, average efficiency, high satisfaction, low sleepiness; n = 1,109), and (3) insomnia with short sleep (ISS; short to medium duration, low efficiency/satisfaction, moderate sleepiness; n = 291). Phenotype predicted time to all-cause mortality (χ2 = 9.4, P = .01), with HSP conferring greater risk than AS (hazard ratio [95% confidence interval] = 1.48 [1.15-1.92]) or ISS (1.52 [1.07-2.17]), despite ISS reporting the poorest mental and physical health. Although sex did not formally moderate the relationship between phenotype and mortality, subgroup analyses indicated that these findings were driven primarily by women. Phenotype did not predict cardiovascular mortality. CONCLUSIONS These analyses support the utility of examining multidimensional sleep health profiles by suggesting that the combination of long sleep, high efficiency/satisfaction, and daytime sleepiness-previously identified as independent risk factors-may be components of a single high-risk sleep phenotype, HSP. Further investigation of sex differences and the mechanisms underlying mortality risk associated with HSP is warranted.
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Affiliation(s)
- M L Wallace
- Department of Psychiatry, University of Pittsburgh, 3811 O'Hara St, Pittsburgh, PA, 15213, USA; Department of Biostatistics, University of Pittsburgh, 130 De Soto St, Pittsburgh, PA, 15261, USA.
| | - S Lee
- School of Aging Studies, College of Behavioral and Community Sciences, University of South Florida, 4202 E Fowler Ave, Tampa, FL 33620, USA
| | - M H Hall
- Department of Psychiatry, University of Pittsburgh, 3811 O'Hara St, Pittsburgh, PA, 15213, USA
| | - K L Stone
- California Pacific Medical Center Research Institute, Mission Hall, Second Floor, 550 16th St, San Francisco, CA 94158, USA
| | - L Langsetmo
- Division of Epidemiology and Community Health, University of Minnesota, 1300 S 2nd St, Suite 300, Minneapolis, MN, 55454, USA
| | - S Redline
- Departments of Medicine, Brigham and Women's Hospital and Beth Israel Deaconess Medical Center, Harvard Medical School, 25 Shattuck St, Boston, MA 02115, USA
| | - J T Schousboe
- Park Nicollet Clinic and Health Partners Institute, HealthPartners Inc, 3311 Old Shakopee Road, Bloomington, MN 55425, USA
| | - K Ensrud
- Division of Epidemiology and Community Health, University of Minnesota, 1300 S 2nd St, Suite 300, Minneapolis, MN, 55454, USA; Department of Medicine, University of Minnesota, 401 E River Pkwy, VCRC Suite 131, Minneapolis, MN 55455, USA
| | - E S LeBlanc
- Kaiser Permanente Center for Health Research NW, 3800 N Interstate Ave, Portland, OR 97227-1098, USA
| | - D J Buysse
- Department of Psychiatry, University of Pittsburgh, 3811 O'Hara St, Pittsburgh, PA, 15213, USA
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Swanson CM, Blatchford PJ, Orwoll ES, Cauley JA, LeBlanc ES, Fink HA, Wright KP, Wierman ME, Kohrt WM, Stone KL. Association between objective sleep duration and bone mineral density in older postmenopausal women from the Study of Osteoporotic Fractures (SOF). Osteoporos Int 2019; 30:2087-2098. [PMID: 31139855 PMCID: PMC6800619 DOI: 10.1007/s00198-019-05007-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 01/21/2019] [Accepted: 05/02/2019] [Indexed: 10/26/2022]
Abstract
Methodological limitations preclude determination of the association between sleep duration and bone mineral density (BMD) from existing literature. This was the first study to use objective sleep duration to determine its association with BMD. Nocturnal sleep duration, assessed objectively (actigraphy) or subjectively (questionnaire), was not independently associated with BMD in postmenopausal women. INTRODUCTION Both long and short self-reported sleep durations are associated with low bone mineral density (BMD) in men and women. The association between sleep duration measured by actigraphy and BMD in postmenopausal women is unknown. METHODS The Study of Osteoporotic Fractures (SOF) ancillary sleep study was used to determine the association between sleep duration and BMD at the total hip and femoral neck in postmenopausal women ≥ 75 years old. Sleep duration was assessed by wrist actigraphy (average 4 nights) and questionnaire. BMD was compared between postmenopausal women with short (< 6 h/night) vs. NIH-recommended (7-8 h/night) sleep durations. Data were analyzed using a 2-sample t test (unadjusted) and multivariate regression model (adjusted). Simple linear regression was used to estimate the difference in BMD per additional hour of sleep when sleep duration was considered as a continuous, rather than dichotomized, variable. RESULTS Total hip BMD was higher in women with actigraphically assessed shorter sleep duration in unadjusted models only. No clinically or statistically significant differences in total hip or femoral neck BMD were observed according to nocturnal sleep duration after adjusting for body mass index (BMI) in dichotomized (N = 874) or continuous (N = 1624) sleep duration models or when subjective sleep duration was used. When sleep duration included daytime naps, longer sleep duration was associated with lower total hip BMD (β = - 0.005, p = 0.04). CONCLUSIONS Nocturnal sleep duration, whether assessed objectively (actigraphy) or subjectively (questionnaire), was not independently associated with BMD in older postmenopausal women.
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Affiliation(s)
- C M Swanson
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA.
| | - P J Blatchford
- Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, CO, USA
| | - E S Orwoll
- Division of Endocrinology and Bone & Mineral Unit, Oregon Health & Science University, Portland, OR, USA
| | - J A Cauley
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - E S LeBlanc
- Kaiser Permanente Center for Health Research NW, Portland, OR, USA
| | - H A Fink
- Geriatric Research Education and Clinical Center, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, USA
| | - K P Wright
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, USA
| | - M E Wierman
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
- Research Service, Rocky Mountain Regional Veterans Affairs Medical Center Aurora, Aurora, CO, USA
| | - W M Kohrt
- Division of Geriatric Medicine, and Eastern Colorado VA Geriatric, Research, Education, and Clinical Center (GRECC), University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - K L Stone
- Research Institute, California Pacific Medical Center, San Francisco, CA, USA
- San Francisco Coordinating Center, University of California San Francisco, San Francisco, CA, USA
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Buysse DJ, Blackwell T, Ancoli-Israel S, Ensrud KE, Wallace M, Cawthon PM, Spira AP, Stone KL. MULTI-DIMENSIONAL SUBJECTIVE SLEEP HEALTH AND AGE-RELATED OUTCOMES. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- D J Buysse
- University of Pittsburgh, Pittsburgh, PA, USA
| | - T Blackwell
- California Pacific Medical Center Research Institute, San Francisco, CA, USA
| | | | - K E Ensrud
- University of Minnesota, Minneapolis, MN, USA.edu
| | - M Wallace
- University of Pittsburgh, Pittsburgh, PA, USA
| | - P M Cawthon
- California Pacific Medical Center Research Institute, San Francisco, CA, USA
| | - A P Spira
- Johns Hopkins University, Baltimore, MD, USA
| | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, California, United States
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Renner SW, Boudreau RM, Strotmeyer ES, Cawthon PM, Stone KL, Cauley JA, Glynn NW. PERCEIVED PHYSICAL FATIGABILITY INCREASES PROSPECTIVE FALL RISK: THE OSTEOPOROTIC FRACTURES IN MEN STUDY (MROS). Innov Aging 2018. [DOI: 10.1093/geroni/igy023.734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S W Renner
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA, Pittsburgh, Pennsylvania, United States
| | - R M Boudreau
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, United States
| | - E S Strotmeyer
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, United States
| | - P M Cawthon
- Research Institute, California Pacific Medical Center, San Francisco, CA, United States
| | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA, United States
| | - J A Cauley
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, United States
| | - N W Glynn
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, United States
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Stone KL, Blackwell T, Ancoli-Israel S, Ensrud KE, Kado DM, Wallace ML, Cawthon PM, Buysse DJ. SLEEP HEALTH AND FUNCTIONAL LIMITATIONS IN OLDER ADULTS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K L Stone
- California Pacific Medical Center Research Institute, San Francisco, California, United States
| | - T Blackwell
- California Pacific Medical Center Research Institute, San Francisco, CA, USA
| | | | - K E Ensrud
- University of Minnesota, Minneapolis, MN, USA
| | - D M Kado
- University of California, San Diego, CA, USA
| | - M L Wallace
- University of Pittsburgh, Pittsburgh, PA, USA
| | - P M Cawthon
- California Pacific Medical Center Research Institute, San Francisco, CA, USA
| | - D J Buysse
- University of Pittsburgh, Pittsburgh, PA, USA
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Holingue C, T Owusu J, Tzuang M, Yaffe K, Stone KL, W Rebok G, Ancoli-Israel S, P Spira A. OBJECTIVELY MEASURED SLEEP AND DECLINE IN PERFORMANCE-BASED PHYSICAL FUNCTION IN OLDER MEN. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- C Holingue
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States
| | - J T Owusu
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - M Tzuang
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - K Yaffe
- Departments of Psychiatry, Neurology, Epidemiology and Biostatistics, University of California, San Francisco, CA, USA; San Francisco VA Medical Center, San Francisco, CA, USA
| | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA, USA; Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
| | - G W Rebok
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA; Johns Hopkins Center on Aging and Health, Baltimore, MD, USA
| | - S Ancoli-Israel
- Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | - A P Spira
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA; Johns Hopkins Center on Aging and Health, Baltimore, MD, USA
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Lee S, Stone KL, Engeland CG, Buxton OM. POOR SLEEP HEALTH MEDIATES THE ASSOCIATION BETWEEN OLDER MEN’S ARTHRITIS AND SYSTEMIC INFLAMMATION. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- S Lee
- Penn State University, University Park, Pennsylvania, United States
| | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA, USA
| | - C G Engeland
- Pennsylvania State University, University Park, PA, USA
| | - O M Buxton
- Pennsylvania State University, University Park, PA, USA; Harvard Medical School, Boston, MA, USA; Harvard Chan School of Public Health, Boston, MA, USA; Brigham and Women’s Hospital, Boston, MA, USA
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12
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Murillo-de-Ozores AR, Rodríguez-Gama A, Bazúa-Valenti S, Leyva-Ríos K, Vázquez N, Pacheco-Álvarez D, De La Rosa-Velázquez IA, Wengi A, Stone KL, Zhang J, Loffing J, Lifton RP, Yang CL, Ellison DH, Gamba G, Castañeda-Bueno M. C-terminally truncated, kidney-specific variants of the WNK4 kinase lack several sites that regulate its activity. J Biol Chem 2018; 293:12209-12221. [PMID: 29921588 DOI: 10.1074/jbc.ra118.003037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 06/14/2018] [Indexed: 12/13/2022] Open
Abstract
WNK lysine-deficient protein kinase 4 (WNK4) is an important regulator of renal salt handling. Mutations in its gene cause pseudohypoaldosteronism type II, mainly arising from overactivation of the renal Na+/Cl- cotransporter (NCC). In addition to full-length WNK4, we have observed faster migrating bands (between 95 and 130 kDa) in Western blots of kidney lysates. Therefore, we hypothesized that these could correspond to uncharacterized WNK4 variants. Here, using several WNK4 antibodies and WNK4-/- mice as controls, we showed that these bands indeed correspond to short WNK4 variants that are not observed in other tissue lysates. LC-MS/MS confirmed these bands as WNK4 variants that lack C-terminal segments. In HEK293 cells, truncation of WNK4's C terminus at several positions increased its kinase activity toward Ste20-related proline/alanine-rich kinase (SPAK), unless the truncated segment included the SPAK-binding site. Of note, this gain-of-function effect was due to the loss of a protein phosphatase 1 (PP1)-binding site in WNK4. Cotransfection with PP1 resulted in WNK4 dephosphorylation, an activity that was abrogated in the PP1-binding site WNK4 mutant. The electrophoretic mobility of the in vivo short variants of renal WNK4 suggested that they lack the SPAK-binding site and thus may not behave as constitutively active kinases toward SPAK. Finally, we show that at least one of the WNK4 short variants may be produced by proteolysis involving a Zn2+-dependent metalloprotease, as recombinant full-length WNK4 was cleaved when incubated with kidney lysate.
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Affiliation(s)
| | - Alejandro Rodríguez-Gama
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico
| | - Silvana Bazúa-Valenti
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico
| | - Karla Leyva-Ríos
- Escuela de Medicina, Universidad Panamericana, Mexico City 03920, Mexico
| | - Norma Vázquez
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico
| | | | - Inti A De La Rosa-Velázquez
- Genomics Laboratory, RAI, Universidad Nacional Autónoma de México-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico
| | - Agnieszka Wengi
- Institute of Anatomy and Swiss National Centre of Competence in Research "Kidney Control of Homeostasis," University of Zurich, Zurich 8057, Switzerland
| | - Kathryn L Stone
- MS and Proteomics Resource, W. M. Keck Biotechnology Resource Laboratory, Yale University School of Medicine, New Haven 06510, Connecticut
| | - Junhui Zhang
- Department of Genetics, Yale University School of Medicine, New Haven 06510, Connecticut
| | - Johannes Loffing
- Institute of Anatomy and Swiss National Centre of Competence in Research "Kidney Control of Homeostasis," University of Zurich, Zurich 8057, Switzerland
| | - Richard P Lifton
- Department of Genetics, Yale University School of Medicine, New Haven 06510, Connecticut; Laboratory of Human Genetics and Genomics, Rockefeller University, New York, New York 10065
| | - Chao-Ling Yang
- Division of Nephrology and Hypertension, Department of Medicine, Oregon Health and Science University, Portland, Oregon 97239; Veterans Affairs Portland Health Care System, Portland, Oregon 97239
| | - David H Ellison
- Division of Nephrology and Hypertension, Department of Medicine, Oregon Health and Science University, Portland, Oregon 97239; Veterans Affairs Portland Health Care System, Portland, Oregon 97239
| | - Gerardo Gamba
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico; Department of Nephrology and Mineral Metabolism, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico; Tecnológico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey 64710, Nuevo León, Mexico
| | - Maria Castañeda-Bueno
- Department of Nephrology and Mineral Metabolism, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico.
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13
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Rauniyar N, Yu X, Cantley J, Voss EZ, Belcher J, Colangelo CM, Stone KL, Dahl N, Parikh C, Lam TT, Cantley LG. Quantification of Urinary Protein Biomarkers of Autosomal Dominant Polycystic Kidney Disease by Parallel Reaction Monitoring. Proteomics Clin Appl 2018; 12:e1700157. [PMID: 29573172 DOI: 10.1002/prca.201700157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 03/01/2018] [Indexed: 01/21/2023]
Abstract
PURPOSE Autosomal dominant polycystic kidney disease (ADPKD) is a life-long disease in which the genes responsible are known, but the pathogenesis of cyst formation and cyst growth are not understood. Cyst growth ultimately leads to end-stage renal failure in most patients. Analysis of the urinary proteome offers the potential to identify proteins that indicate the presence of cysts (and thus provides diagnosis) as well as the rates of cyst growth (providing prognostic information). EXPERIMENTAL DESIGN A scheduled parallel reaction monitoring (sPRM) assay is performed on urine samples from 14 patients and 18 normal controls. For relative quantification, stable isotope-labeled synthetic peptides are spiked in the urinary protein digests prior to data collection. The data are subsequently normalized to creatinine and protein concentration in the respective urine samples to control for variations in water intake between individuals. RESULTS Out of the 143 urinary proteins targeted for sPRM assay, 69 proteins are observed to be significantly dysregulated in ADPKD. The dysregulated proteins are used to cluster ADPKD patients into those who are more or less similar to normal controls. CONCLUSIONS AND CLINICAL RELEVANCE This study shows that sPRM is a promising approach to rapidly screen large numbers of proteins in urine in order to provide earlier diagnosis and potentially better understand the pathogenesis of ADPKD development and progression.
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Affiliation(s)
- Navin Rauniyar
- Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, 06520, New Haven, CT, USA.,MS and Proteomics Resource, W.M. Keck Biotechnology Resource Laboratory, Yale University School of Medicine, 06511, New Haven, CT, USA
| | - Xiaoqing Yu
- Department of Biostatistics and Bioinformatics, H. Lee Moffitt Cancer Center and Research Institute, 33612, Tampa, FL, USA
| | - Jennifer Cantley
- Section of Nephrology, Yale University School of Medicine, 06520, New Haven, CT, USA
| | - Edward Z Voss
- MS and Proteomics Resource, W.M. Keck Biotechnology Resource Laboratory, Yale University School of Medicine, 06511, New Haven, CT, USA
| | - Justin Belcher
- Section of Nephrology, Yale University School of Medicine, 06520, New Haven, CT, USA
| | - Christopher M Colangelo
- MS and Proteomics Resource, W.M. Keck Biotechnology Resource Laboratory, Yale University School of Medicine, 06511, New Haven, CT, USA
| | - Kathryn L Stone
- MS and Proteomics Resource, W.M. Keck Biotechnology Resource Laboratory, Yale University School of Medicine, 06511, New Haven, CT, USA
| | - Neera Dahl
- Section of Nephrology, Yale University School of Medicine, 06520, New Haven, CT, USA
| | - Chirag Parikh
- Section of Nephrology, Yale University School of Medicine, 06520, New Haven, CT, USA.,Program of Applied Translational Research, Yale University School of Medicine, 06520, New Haven, CT, USA
| | - TuKiet T Lam
- Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, 06520, New Haven, CT, USA.,MS and Proteomics Resource, W.M. Keck Biotechnology Resource Laboratory, Yale University School of Medicine, 06511, New Haven, CT, USA
| | - Lloyd G Cantley
- Section of Nephrology, Yale University School of Medicine, 06520, New Haven, CT, USA
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14
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Holingue C, Owusu JT, Yaffe K, Stone KL, Rebok GW, Ancoli-Israel S, Spira AP. 0698 Actigraphic Sleep and Functional Decline in Older Men. Sleep 2018. [DOI: 10.1093/sleep/zsy061.697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- C Holingue
- Department of Mental Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD
| | - J T Owusu
- Department of Mental Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD
| | - K Yaffe
- Departments of Psychiatry, Neurology, Epidemiology and Biostatistics, University of California San Francisco & San Francisco VA Medical Center, San Francsico, CA
| | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA
| | - G W Rebok
- Department of Mental Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD
- Center on Aging and Health, Johns Hopkins University, Baltimore, MD
| | - S Ancoli-Israel
- Department of Psychiatry, University of California San Diego, San Diego, CA
| | - A P Spira
- Department of Mental Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD
- Center on Aging and Health, Johns Hopkins University, Baltimore, MD
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15
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May AM, Koo B, Yaffe K, Leng Y, Cawthon PM, Redline S, Stone KL, Mehra R. 1015 Frequent Periodic Limb Movements During Sleep and Risk of Incident Stroke. Sleep 2018. [DOI: 10.1093/sleep/zsy061.1014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A M May
- Louis Stokes Cleveland VA Medical Center, Cleveland, OH
| | - B Koo
- Yale School of Medicine, New Haven, CT
| | - K Yaffe
- University of California San Francisco, San Francisco, CA
| | - Y Leng
- University of California San Francisco, San Francisco, CA
| | - P M Cawthon
- California Pacific Medical Center Research Institute, San Francisco, CA
- University of California, San Francisco, San Francisco, CA
| | - S Redline
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
- Brigham and Women’s Hospitals, Harvard Medical School, Boston, MA
| | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA
| | - R Mehra
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH
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16
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Tzuang M, Alfini AJ, Yaffe K, Ancoli-Israel S, Redline S, Stone KL, Spira AP. 0697 Prospective Association of Sleep-Disordered Breathing with Functional Decline in Older Men. Sleep 2018. [DOI: 10.1093/sleep/zsy061.696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M Tzuang
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - A J Alfini
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - K Yaffe
- Departments of Psychiatry, Neurology, Epidemiology and Biostatistics, San Francisco, CA
| | - S Ancoli-Israel
- Department of Psychiatry, University of California San Diego, San Diego, CA
| | - S Redline
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA
- Division of Sleep Medicine, Harvard Medical School, Boston, MA
| | - K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA
| | - A P Spira
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD
- Center on Aging and Health, Johns Hopkins University, Baltimore, MD
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17
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Blackwell TL, Robinson S, Thompson N, Dean-Gilley L, Yu P, Pressman A, Stone KL. 1057 Objectively and Subjectively Measured Sleep Quality in an Acute-Care Hospital Setting: A Pilot Study. Sleep 2018. [DOI: 10.1093/sleep/zsy061.1056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T L Blackwell
- California Pacific Medical Center, San Francisco, CA
| | - S Robinson
- Sutter Health, Research, Development & Dissemination, Walnut Creek, CA
| | - N Thompson
- Sutter Tracy Community Hospital, Tracy, CA
| | - L Dean-Gilley
- Sutter Health, Research, Development & Dissemination, Walnut Creek, CA
| | - P Yu
- Sutter Tracy Community Hospital, Tracy, CA
| | - A Pressman
- Sutter Health, Research, Development & Dissemination, Walnut Creek, CA
| | - K L Stone
- California Pacific Medical Center, San Francisco, CA
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18
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Stone KL, Blackwell T, Ancoli-Israel S, Ensrud KE, Kado DM, Wallace MJ, Cawthon PM, Redline S, Buysse DJ. 0702 Sleep Health and Risk of Prevalent and Incident Functional Limitations in Older Adults. Sleep 2018. [DOI: 10.1093/sleep/zsy061.701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA
| | - T Blackwell
- California Pacific Medical Center Research Institute, San Francisco, CA
| | | | - K E Ensrud
- University of Minnesota, Minneapolis, MN
| | - D M Kado
- University of California, San Diego, San Diego, CA
| | | | - P M Cawthon
- California Pacific Medical Center Research Institute, San Francisco, CA
| | - S Redline
- Brigham and Women’s Hospital, Boston, MA
| | - D J Buysse
- University of Pittsburgh, Pittsburgh, PA
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19
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Stone KL, Peters KE, Redline S, Yaffe K, Purcell SM, Mariani S, Djonlagic I, Younes M. 1013 Novel Quantitative EEG Exposures and Risk of Incident MCI and Dementia in Older Women. Sleep 2018. [DOI: 10.1093/sleep/zsy061.1012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K L Stone
- California Pacific Medical Center Research Institute, San Francisco, CA
| | - K E Peters
- California Pacific Medical Center Research Institute, San Francisco, CA
| | - S Redline
- Brigham and Women’s Hospital, Boston, MA
| | - K Yaffe
- University of California, San Francisco, San Francisco, CA
| | | | - S Mariani
- Brigham and Women’s Hospital, Boston, MA
| | | | - M Younes
- University of Manitoba, Winnipeg, MB, CANADA
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20
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Stone KL, Blackwell T, Yu PS, Robinson SC, Dean LM, Ruiz A, Pressman AR. 0857 PILOT STUDY OF SLEEP CHARACTERISTICS IN HOSPITALIZED OLDER ADULTS. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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21
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Full KM, Stone KL, Godbole S, Crist K, Kerr J. 0852 SLEEP DISTURBANCES AND FEAR OF FALLING IN OLDEST ADULTS LIVING IN RETIREMENT COMMUNITY CAMPUS SETTINGS. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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22
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May AM, May RD, Bena J, Wang L, Monahan K, Stone KL, Cawthon PM, Barrett-Connor E, Koo BB, Winkelman JW, Redline S, Mittleman MA, Mehra R. 0720 ASSOCIATION OF INDIVIDUAL PERIODIC LIMB MOVEMENTS AND NON-SUSTAINED TACHYCARDIA DURING SLEEP: A CASE-CROSSOVER ANALYSIS. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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23
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Schwaid AG, Su C, Loos P, Wu J, Nguyen C, Stone KL, Kanyo J, Geoghegan KF, Bhattacharya SK, Dow RL, Buckbinder L, Carpino PA. MAP4K4 Is a Threonine Kinase That Phosphorylates FARP1. ACS Chem Biol 2015; 10:2667-71. [PMID: 26422651 DOI: 10.1021/acschembio.5b00679] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Mitogen-activated protein kinase 4 (MAP4K4) regulates the MEK kinase cascade and is implicated in cytoskeletal rearrangement and migration; however, identifying MAP4K4 substrates has remained a challenge. To ascertain MAP4K4-dependent phosphorylation events, we combined phosphoproteomic studies of MAP4K4 inhibition with in vitro assessment of its kinase specificity. We identified 235 phosphosites affected by MAP4K4 inhibition in cells and found that pTP and pSP motifs were predominant among them. In contrast, in vitro assessment of kinase specificity showed that MAP4K4 favors a pTL motif. We showed that MAP4K4 directly phosphorylates and coimmunoprecipitates with FERM, RhoGEF, and pleckstrin domain-containing protein 1 (FARP1). MAP4K4 inhibition in SH-SY5Y cells increases neurite outgrowth, a process known to involve FARP1. As FARP1 and MAP4K4 both contribute to cytoskeletal rearrangement, the results suggest that MAP4K4 exerts some of its effects on the cytoskeleton via phosphorylation of FARP1.
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Affiliation(s)
| | | | | | - Jiang Wu
- Structural
Biology and Biophysics, Center for Chemistry Innovation and Excellence, Pfizer Pharmatherapeutics Research and Development, Groton, Connecticut 06340, United States
| | - Chuong Nguyen
- Structural
Biology and Biophysics, Center for Chemistry Innovation and Excellence, Pfizer Pharmatherapeutics Research and Development, Groton, Connecticut 06340, United States
| | - Kathryn L. Stone
- W.M.
Keck Foundation Biotechnology Resource Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Jean Kanyo
- W.M.
Keck Foundation Biotechnology Resource Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Kieran F. Geoghegan
- Structural
Biology and Biophysics, Center for Chemistry Innovation and Excellence, Pfizer Pharmatherapeutics Research and Development, Groton, Connecticut 06340, United States
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24
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Cantley LG, Colangelo CM, Stone KL, Chung L, Belcher J, Abbott T, Cantley JL, Williams KR, Parikh CR. Development of a Targeted Urine Proteome Assay for kidney diseases. Proteomics Clin Appl 2015. [PMID: 26220717 DOI: 10.1002/prca.201500020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
PURPOSE Since human urine is the most readily available biofluid whose proteome changes in response to disease, it is a logical sample for identifying protein biomarkers for kidney diseases. EXPERIMENTAL DESIGN Potential biomarkers were identified by using a multiproteomics workflow to compare urine proteomes of kidney transplant patients with immediate and delayed graft function. Differentially expressed proteins were identified, and corresponding stable isotope labeled internal peptide standards were synthesized for scheduled MRM. RESULTS The Targeted Urine Proteome Assay (TUPA) was then developed by identifying those peptides for which there were at least two transitions for which interference in a urine matrix across 156 MRM runs was <30%. This resulted in an assay that monitors 224 peptides from 167 quantifiable proteins. CONCLUSIONS AND CLINICAL RELEVANCE TUPA opens the way for using a robust mass spectrometric technology, MRM, for quantifying and validating biomarkers from among 167 urinary proteins. This approach, while developed using differentially expressed urinary proteins from patients with delayed versus immediate graft function after kidney transplant, can be expanded to include differentially expressed urinary proteins in multiple kidney diseases. Thus, TUPA could provide a single assay to help diagnose, prognose, and manage many kidney diseases.
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Affiliation(s)
- Lloyd G Cantley
- Department of Internal Medicine, School of Medicine, Yale University, New Haven, CT, USA
| | | | - Kathryn L Stone
- W.M. Keck Foundation Biotechnology Laboratory, School of Medicine, Yale University, New Haven, CT, USA
| | - Lisa Chung
- W.M. Keck Foundation Biotechnology Laboratory, School of Medicine, Yale University, New Haven, CT, USA
| | - Justin Belcher
- Department of Internal Medicine, School of Medicine, Yale University, New Haven, CT, USA
| | - Thomas Abbott
- W.M. Keck Foundation Biotechnology Laboratory, School of Medicine, Yale University, New Haven, CT, USA
| | - Jennifer L Cantley
- Department of Internal Medicine, School of Medicine, Yale University, New Haven, CT, USA
| | - Kenneth R Williams
- W.M. Keck Foundation Biotechnology Laboratory, School of Medicine, Yale University, New Haven, CT, USA.,Department of Molecular Biophysics and Biochemistry, School of Medicine, Yale University, New Haven, CT, USA
| | - Chirag R Parikh
- Department of Internal Medicine, School of Medicine, Yale University, New Haven, CT, USA.,Program of Applied Translational Research, Yale University School of Medicine, New Haven, CT, USA
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25
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Colangelo CM, Shifman M, Cheung KH, Stone KL, Carriero NJ, Gulcicek EE, Lam TT, Wu T, Bjornson RD, Bruce C, Nairn AC, Rinehart J, Miller PL, Williams KR. YPED: an integrated bioinformatics suite and database for mass spectrometry-based proteomics research. Genomics Proteomics Bioinformatics 2015; 13:25-35. [PMID: 25712262 PMCID: PMC4411476 DOI: 10.1016/j.gpb.2014.11.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/13/2014] [Accepted: 11/11/2014] [Indexed: 10/25/2022]
Abstract
We report a significantly-enhanced bioinformatics suite and database for proteomics research called Yale Protein Expression Database (YPED) that is used by investigators at more than 300 institutions worldwide. YPED meets the data management, archival, and analysis needs of a high-throughput mass spectrometry-based proteomics research ranging from a single laboratory, group of laboratories within and beyond an institution, to the entire proteomics community. The current version is a significant improvement over the first version in that it contains new modules for liquid chromatography-tandem mass spectrometry (LC-MS/MS) database search results, label and label-free quantitative proteomic analysis, and several scoring outputs for phosphopeptide site localization. In addition, we have added both peptide and protein comparative analysis tools to enable pairwise analysis of distinct peptides/proteins in each sample and of overlapping peptides/proteins between all samples in multiple datasets. We have also implemented a targeted proteomics module for automated multiple reaction monitoring (MRM)/selective reaction monitoring (SRM) assay development. We have linked YPED's database search results and both label-based and label-free fold-change analysis to the Skyline Panorama repository for online spectra visualization. In addition, we have built enhanced functionality to curate peptide identifications into an MS/MS peptide spectral library for all of our protein database search identification results.
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Affiliation(s)
- Christopher M Colangelo
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA.
| | - Mark Shifman
- Yale Center for Medical Informatics, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Anesthesiology, School of Medicine, Yale University, New Haven, CT 06510, USA
| | - Kei-Hoi Cheung
- Yale Center for Medical Informatics, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Emergency Medicine, School of Medicine, Yale University, New Haven, CT 06510, USA; VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Kathryn L Stone
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA
| | - Nicholas J Carriero
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Computer Science, Yale University, New Haven, CT 06520, USA; Yale Center for Genome Analysis, West Campus, Yale University, Orange, CT 06477, USA
| | - Erol E Gulcicek
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA
| | - TuKiet T Lam
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA
| | - Terence Wu
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA; Yale West Campus Analytical Core, West Campus, Yale University, West Haven, CT 06516, USA
| | - Robert D Bjornson
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Computer Science, Yale University, New Haven, CT 06520, USA; Yale Center for Genome Analysis, West Campus, Yale University, Orange, CT 06477, USA
| | - Can Bruce
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA; Yale Bioinformatics Resource, School of Medicine, Yale University, New Haven, CT 06510, USA
| | - Angus C Nairn
- Department of Psychiatry, School of Medicine, Yale University, New Haven, CT 06510, USA
| | - Jesse Rinehart
- Department of Cellular & Molecular Physiology, School of Medicine, Yale University, New Haven, CT 06510, USA; Systems Biology Institute, Yale University, West Haven, CT 06516, USA
| | - Perry L Miller
- Yale Center for Medical Informatics, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Anesthesiology, School of Medicine, Yale University, New Haven, CT 06510, USA; VA Connecticut Healthcare System, West Haven, CT 06516, USA
| | - Kenneth R Williams
- W.M. Keck Foundation Biotechnology Resource Laboratory, School of Medicine, Yale University, New Haven, CT 06510, USA; Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA
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McClure-Begley TD, Papke RL, Stone KL, Stokes C, Levy AD, Gelernter J, Xie P, Lindstrom J, Picciotto MR. Rare human nicotinic acetylcholine receptor α4 subunit (CHRNA4) variants affect expression and function of high-affinity nicotinic acetylcholine receptors. J Pharmacol Exp Ther 2014; 348:410-20. [PMID: 24385388 DOI: 10.1124/jpet.113.209767] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Nicotine, the primary psychoactive component in tobacco smoke, produces its behavioral effects through interactions with neuronal nicotinic acetylcholine receptors (nAChRs). α4β2 nAChRs are the most abundant in mammalian brain, and converging evidence shows that this subtype mediates the rewarding and reinforcing effects of nicotine. A number of rare variants in the CHRNA4 gene that encode the α4 nAChR subunit have been identified in human subjects and appear to be underrepresented in a cohort of smokers. We compared three of these variants (α4R336C, α4P451L, and α4R487Q) to the common variant to determine their effects on α4β2 nAChR pharmacology. We examined [(3)H]epibatidine binding, interacting proteins, and phosphorylation of the α4 nAChR subunit with liquid chromatography and tandem mass spectrometry (LC-MS/MS) in HEK 293 cells and voltage-clamp electrophysiology in Xenopus laevis oocytes. We observed significant effects of the α4 variants on nAChR expression, subcellular distribution, and sensitivity to nicotine-induced receptor upregulation. Proteomic analysis of immunopurified α4β2 nAChRs incorporating the rare variants identified considerable differences in the intracellular interactomes due to these single amino acid substitutions. Electrophysiological characterization in X. laevis oocytes revealed alterations in the functional parameters of activation by nAChR agonists conferred by these α4 rare variants, as well as shifts in receptor function after incubation with nicotine. Taken together, these experiments suggest that genetic variation at CHRNA4 alters the assembly and expression of human α4β2 nAChRs, resulting in receptors that are more sensitive to nicotine exposure than those assembled with the common α4 variant. The changes in nAChR pharmacology could contribute to differences in responses to smoked nicotine in individuals harboring these rare variants.
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Affiliation(s)
- T D McClure-Begley
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut (T.D.M.-B., A.D.L., J.G., M.R.P.); Institute for Behavioral Genetics, University of Colorado, Boulder, Boulder, Colorado (T.D.M.-B.); Department of Pharmacology and Therapeutics, University of Florida, Gainesville, Florida (R.L.P., C.S.); W.M. Keck Biotechnology Research Laboratory (K.S.), Interdepartmental Neuroscience Program (A.D.L., M.R.P.), Department of Genetics (J.G., P.X.), and Department of Neurobiology, Yale University School of Medicine, New Haven, Connecticut (M.R.P.); Department of Psychiatry, Veterans Affairs Connecticut Healthcare Center, West Haven, Connecticut (J.G.); Center for Human Genome Variation, Duke University, Durham, North Carolina (P.X.); and Department of Neuroscience, Medical School of the University of Pennsylvania, Philadelphia, Pennsylvania (J.L.)
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Diem SJ, Harrison SL, Haney E, Cauley JA, Stone KL, Orwoll E, Ensrud KE. Depressive symptoms and rates of bone loss at the hip in older men. Osteoporos Int 2013; 24:111-9. [PMID: 22461074 PMCID: PMC3833356 DOI: 10.1007/s00198-012-1975-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [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: 10/24/2011] [Accepted: 01/04/2012] [Indexed: 10/28/2022]
Abstract
UNLABELLED In this prospective cohort study, depressive symptoms were associated with higher rates of bone loss in older men. Poorer performance on physical function tests partly explained the association between depressive symptoms and bone loss, suggesting that efforts to increase exercise and improve physical performance in depressed men may be beneficial. INTRODUCTION The aim of this study was to ascertain whether depressive symptoms are associated with increased rates of bone loss at the hip in older men. METHODS A population-based prospective cohort study of 2,464 community-dwelling men, aged 68 and older, enrolled in the Osteoporosis in Men Sleep Ancillary Study had depressive symptoms assessed by the Geriatric Depression Scale (GDS). Subjects were categorized as depressed if GDS ≥6 at the initial examination. Bone mineral density (BMD) at the hip was measured using dual-energy X-ray absorptiometry at the initial and follow-up examination (average 3.4 years between exams). Use of antidepressant medications was assessed by interview and verified from medication containers at the two examinations. A computerized dictionary was used to categorize type of medication. RESULTS In a base model adjusted for age, race/ethnicity, and clinic site, the mean total hip BMD decreased 0.70 %/year in 136 men with a GDS score of ≥6 compared to 0.39 %/year in 2,328 men with a GDS score of <6 (p = 0.001). Walking speed and timed chair stand partly explained the association between depressive symptoms and rates of bone loss. CONCLUSION Depression, as defined by a score of 6 or greater on the Geriatric Depression Scale, is associated with an increased rate of bone loss at the hip in this cohort of older men. Adjustment for walking speed and timed chair stand attenuated the strength of the association, suggesting that differences in physical functioning do partially explain the observed association.
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Affiliation(s)
- S J Diem
- Department of Medicine and Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN 55415, USA.
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Shabman RS, Leung DW, Johnson J, Glennon N, Gulcicek EE, Stone KL, Leung L, Hensley L, Amarasinghe GK, Basler CF. DRBP76 associates with Ebola virus VP35 and suppresses viral polymerase function. J Infect Dis 2011; 204 Suppl 3:S911-8. [PMID: 21987769 DOI: 10.1093/infdis/jir343] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The Zaire Ebola virus (EBOV) protein VP35 is multifunctional; it inhibits IFN-α/β production and functions as a cofactor of the viral RNA polymerase. Mass spectrometry identified the double stranded RNA binding protein 76 (DRBP76/NFAR-1/NF90) as a cellular factor that associates with the VP35 C-terminal interferon inhibitory domain (IID). DRBP76 is described to regulate host cell protein synthesis and play an important role in host defense. The VP35-IID-DRBP76 interaction required the addition of exogenous dsRNA, but full-length VP35 associated with DRBP76 in the absence of exogenous dsRNA. Cells infected with a Newcastle disease virus (NDV)-expressing VP35 redistributed DRBP76 from the nucleus to the cytoplasm, the compartment in which EBOV replicates. Overexpression of DRBP76 did not alter the ability of VP35 to inhibit type I IFN production but did impair the function of the EBOV transcription/replication complex. These data suggest that DRBP76, via its association with VP35, exerts an anti-EBOV function.
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Affiliation(s)
- Reed S Shabman
- Department of Microbiology, Mount Sinai School of Medicine, New York, New York 10029, USA
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Shabman RS, Gulcicek EE, Stone KL, Basler CF. The Ebola virus VP24 protein prevents hnRNP C1/C2 binding to karyopherin α1 and partially alters its nuclear import. J Infect Dis 2011; 204 Suppl 3:S904-10. [PMID: 21987768 DOI: 10.1093/infdis/jir323] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The Ebola virus (EBOV) protein VP24 inhibits type I and II interferon (IFN) signaling by binding to NPI-1 subfamily karyopherin α (KPNA) nuclear import proteins, preventing their interaction with tyrosine-phosphorylated STAT1 (phospho-STAT1). This inhibits phospho-STAT1 nuclear import. A biochemical screen now identifies heterogeneous nuclear ribonuclear protein complex C1/C2 (hnRNP C1/C2) nuclear import as an additional target of VP24. Co-immunoprecipitation studies demonstrate that hnRNP C1/C2 interacts with multiple KPNA family members, including KPNA1. Interaction with hnRNP C1/C2 occurs through the same KPNA1 C-terminal region (amino acids 424-457) that binds VP24 and phospho-STAT1. The ability of hnRNP C1/C2 to bind KPNA1 is diminished in the presence of VP24, and cells transiently expressing VP24 redistribute hnRNP C1/C2 from the nucleus to the cytoplasm. These data further define the mechanism of hnRNP C1/C2 nuclear import and demonstrate that the impact of EBOV VP24 on nuclear import extends beyond STAT1.
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Affiliation(s)
- Reed S Shabman
- Mount Sinai School of Medicine, New York, New York 10029, USA
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Noga EJ, Stone KL, Wood A, Gordon WL, Robinette D. Primary structure and cellular localization of callinectin, an antimicrobial peptide from the blue crab. Dev Comp Immunol 2011; 35:409-15. [PMID: 21115038 PMCID: PMC3046215 DOI: 10.1016/j.dci.2010.11.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2010] [Accepted: 11/23/2010] [Indexed: 05/04/2023]
Abstract
We report the complete amino acid sequence of callinectin, a 32 amino acid, proline-, arginine-rich antimicrobial peptide (AMP) with four cysteines and having the sequence WNSNRRFRVGRPPVVGRPGCVCFRAPCPCSNY-amide. The primary structure of callinectin is highly similar to arasins, AMPs recently identified in the small spider crab (Hyas araneus). Callinectin exists in three isomers that vary in the functional group on the tryptophan (W) residue. The most prevalent isomer had a hydroxy-N-formylkynurenine group, while the other two isomers had either N-formylkynurenine or hydroxy-tryptophan. Using a sequence highly similar to native callinectin, we chemically synthesized a peptide which we called callinectin-like peptide (CLP). Via immuno-electron microscopy, affinity-purified rabbit antibodies raised to CLP successfully localized the site of callinectin in blue crab hemocytes to the large electron-dense granules that are found primarily in large granule hemocytes.
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Affiliation(s)
- Edward J Noga
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, NC 27606, USA.
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Bordner KA, George ED, Carlyle BC, Duque A, Kitchen RR, Lam TT, Colangelo CM, Stone KL, Abbott TB, Mane SM, Nairn AC, Simen AA. Functional genomic and proteomic analysis reveals disruption of myelin-related genes and translation in a mouse model of early life neglect. Front Psychiatry 2011; 2:18. [PMID: 21629843 PMCID: PMC3098717 DOI: 10.3389/fpsyt.2011.00018] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Accepted: 04/11/2011] [Indexed: 12/13/2022] Open
Abstract
Early life neglect is an important public health problem which can lead to lasting psychological dysfunction. Good animal models are necessary to understand the mechanisms responsible for the behavioral and anatomical pathology that results. We recently described a novel model of early life neglect, maternal separation with early weaning (MSEW), that produces behavioral changes in the mouse that persist into adulthood. To begin to understand the mechanism by which MSEW leads to these changes we applied cDNA microarray, next-generation RNA-sequencing (RNA-seq), label-free proteomics, multiple reaction monitoring (MRM) proteomics, and methylation analysis to tissue samples obtained from medial prefrontal cortex to determine the molecular changes induced by MSEW that persist into adulthood. The results show that MSEW leads to dysregulation of markers of mature oligodendrocytes and genes involved in protein translation and other categories, an apparent downward biasing of translation, and methylation changes in the promoter regions of selected dysregulated genes. These findings are likely to prove useful in understanding the mechanism by which early life neglect affects brain structure, cognition, and behavior.
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Affiliation(s)
- Kelly A Bordner
- Department of Psychiatry, Yale University School of Medicine New Haven, CT, USA
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Seo JK, Stephenson J, Crawford JM, Stone KL, Noga EJ. American oyster, Crassostrea virginica, expresses a potent antibacterial histone H2B protein. Mar Biotechnol (NY) 2010; 12:543-551. [PMID: 19949827 DOI: 10.1007/s10126-009-9240-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2009] [Accepted: 10/27/2009] [Indexed: 05/28/2023]
Abstract
An antibacterial protein was purified from acidified gill extract of a bivalve mollusk, the American oyster (Crassostrea virginica). Protein isolation was best accomplished by briefly boiling the tissues in a weak acetic acid solution. Adding protease inhibitors while boiling did not have a major effect on activity recovery. In contrast, use of only protease inhibitors (without boiling) resulted in virtually no recovery of this activity. The amino acid sequence of this antibacterial protein was identified as a histone H2B and was designated cvH2B. cvH2B had potent activity against gram-negative bacteria, including the human pathogens Vibrio parahaemolyticus and Vibrio vulnificus, which commonly reside in oyster tissues. We estimated that the concentration of this protein was well within the concentration that was inhibitory to these bacterial pathogens in vitro. This is the first report of the antimicrobial function of histone H2B from any mollusk.
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Affiliation(s)
- Jung-Kil Seo
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, NC 27606, USA
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Rajagopal C, Stone KL, Mains RE, Eipper BA. Secretion stimulates intramembrane proteolysis of a secretory granule membrane enzyme. J Biol Chem 2010; 285:34632-42. [PMID: 20817724 DOI: 10.1074/jbc.m110.145334] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Regulated intramembrane proteolysis, a highly conserved process employed by diverse regulatory pathways, can release soluble fragments that directly or indirectly modulate gene expression. In this study we used pharmacological tools to identify peptidylglycine α-amidating monooxygenase (PAM), a type I secretory granule membrane protein, as a γ-secretase substrate. PAM, an essential enzyme, catalyzes the final step in the synthesis of the majority of neuropeptides that control metabolic homeostasis. Mass spectroscopy was most consistent with the presence of multiple closely spaced NH(2) termini, suggesting that cleavage occurred near the middle of the PAM transmembrane domain. The luminal domains of PAM must undergo a series of prohormone convertase or α-secretase-mediated cleavages before the remaining transmembrane domain/cytosolic domain fragment can undergo a γ-secretase-like cleavage. Cleavage by γ-secretase generates a soluble fragment of the cytosolic domain (sf-CD) that is known to localize to the nucleus. Although PAM sf-CD is unstable in AtT-20 corticotroph tumor cells, it is readily detected in primary rat anterior pituitary cells. PAM isoform expression, which is tissue-specific and developmentally regulated, affects the efficiency with which sf-CD is produced. sf-CD levels are also modulated by the phosphorylation status of the cytosolic domain and by the ability of the cytosolic domain to interact with cytosolic proteins. sf-CD is produced by primary rat anterior pituitary cells in response to secretogogue, suggesting that sf-CD acts as a signaling molecule relaying information about secretion from the secretory granule to the nucleus.
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Affiliation(s)
- Chitra Rajagopal
- Departments of Molecular, Microbial, and Structural Biology, University of Connecticut Health Center, Farmington, Connecticut 06030, USA
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Chong R, Swiss R, Briones G, Stone KL, Gulcicek EE, Agaisse H. Regulatory mimicry in Listeria monocytogenes actin-based motility. Cell Host Microbe 2009; 6:268-78. [PMID: 19748468 DOI: 10.1016/j.chom.2009.08.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Revised: 06/17/2009] [Accepted: 08/25/2009] [Indexed: 12/22/2022]
Abstract
The actin-based motility of the intracellular pathogen Listeria monocytogenes relies on ActA, a bacterial factor with a structural domain allowing it to mimic the actin nucleation-promoting activity of host cell proteins of the WASP/WAVE family. Here, we used an RNAi-based genetic approach in combination with computer-assisted image analysis to investigate the role of host factors in L. monocytogenes cell-to-cell spread. We showed that the host cell serine/threonine kinase CK2 is required for efficient actin tail formation by L. monocytogenes. Furthermore, CK2-mediated phosphorylation of ActA regulated its affinity for the actin-nucleating ARP2/3 complex, as is the case for CK2-mediated phosphorylation of WASP and WAVE. Thus, ActA not only displays structural mimicry of WASP/WAVE family members, but also regulatory mimicry, having precisely co-opted the host machinery regulating these proteins. Comparisons based on ActA amino acid sequence suggest that unrelated pathogens that display actin-based motility may have evolved a similar strategy of regulatory mimicry.
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Affiliation(s)
- Ryan Chong
- Section of Microbial Pathogenesis, Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, CT, USA
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Rinehart J, Maksimova YD, Tanis JE, Stone KL, Hodson CA, Zhang J, Risinger M, Pan W, Wu D, Colangelo CM, Forbush B, Joiner CH, Gulcicek EE, Gallagher PG, Lifton RP. Sites of regulated phosphorylation that control K-Cl cotransporter activity. Cell 2009; 138:525-36. [PMID: 19665974 PMCID: PMC2811214 DOI: 10.1016/j.cell.2009.05.031] [Citation(s) in RCA: 225] [Impact Index Per Article: 15.0] [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: 08/07/2008] [Revised: 12/29/2008] [Accepted: 05/07/2009] [Indexed: 10/20/2022]
Abstract
Modulation of intracellular chloride concentration ([Cl(-)](i)) plays a fundamental role in cell volume regulation and neuronal response to GABA. Cl(-) exit via K-Cl cotransporters (KCCs) is a major determinant of [Cl(-)](I); however, mechanisms governing KCC activities are poorly understood. We identified two sites in KCC3 that are rapidly dephosphorylated in hypotonic conditions in cultured cells and human red blood cells in parallel with increased transport activity. Alanine substitutions at these sites result in constitutively active cotransport. These sites are highly phosphorylated in plasma membrane KCC3 in isotonic conditions, suggesting that dephosphorylation increases KCC3's intrinsic transport activity. Reduction of WNK1 expression via RNA interference reduces phosphorylation at these sites. Homologous sites are phosphorylated in all human KCCs. KCC2 is partially phosphorylated in neonatal mouse brain and dephosphorylated in parallel with KCC2 activation. These findings provide insight into regulation of [Cl(-)](i) and have implications for control of cell volume and neuronal function.
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Affiliation(s)
- Jesse Rinehart
- Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06510, USA
- Yale/National Heart, Lung, and Blood Institute Proteomics Center, Yale University, New Haven, CT 06511, USA
| | - Yelena D. Maksimova
- Department of Pediatrics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Jessica E. Tanis
- Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Kathryn L. Stone
- Yale/National Heart, Lung, and Blood Institute Proteomics Center, Yale University, New Haven, CT 06511, USA
- Keck Biotechnology Resource Laboratory, Yale University, New Haven, CT 06511, USA
| | - Caleb A. Hodson
- Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Junhui Zhang
- Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Mary Risinger
- Cincinnati Comprehensive Sickle Cell Center, Division of Hematology/Oncology, University of Cincinnati College of Medicine and Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Weijun Pan
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Dianqing Wu
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Christopher M. Colangelo
- Yale/National Heart, Lung, and Blood Institute Proteomics Center, Yale University, New Haven, CT 06511, USA
- Keck Biotechnology Resource Laboratory, Yale University, New Haven, CT 06511, USA
| | - Biff Forbush
- Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Clinton H. Joiner
- Cincinnati Comprehensive Sickle Cell Center, Division of Hematology/Oncology, University of Cincinnati College of Medicine and Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Erol E. Gulcicek
- Yale/National Heart, Lung, and Blood Institute Proteomics Center, Yale University, New Haven, CT 06511, USA
- Keck Biotechnology Resource Laboratory, Yale University, New Haven, CT 06511, USA
| | - Patrick G. Gallagher
- Department of Pediatrics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Richard P. Lifton
- Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06510, USA
- Yale/National Heart, Lung, and Blood Institute Proteomics Center, Yale University, New Haven, CT 06511, USA
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Rajagopal C, Stone KL, Francone VP, Mains RE, Eipper BA. Secretory granule to the nucleus: role of a multiply phosphorylated intrinsically unstructured domain. J Biol Chem 2009; 284:25723-34. [PMID: 19635792 DOI: 10.1074/jbc.m109.035782] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Intrinsically unstructured domains occur in one-third of all proteins and are characterized by conformational flexibility, protease sensitivity, and the occurrence of multiple phosphorylation. They provide large interfaces for diverse protein-protein interactions. Peptidylglycine alpha-amidating monooxygenase (PAM), an enzyme essential for neuropeptide biosynthesis, is a secretory granule membrane protein. As one of the few proteins spanning the granule membrane, PAM is a candidate to relay information about the status of the granule pool and conditions in the granule lumen. Here, we show that the PAM cytosolic domain is unstructured. Mass spectroscopy and two-dimensional gel electrophoresis demonstrated phosphorylation at 10-12 sites in the cytosolic domain. Stimulation of exocytosis resulted in coupled phosphorylation and dephosphorylation of specific sites and in the endoproteolytic release of a soluble, proteasome-sensitive cytosolic domain fragment. Analysis of granule-rich tissues, such as pituitary and heart, showed that a similar fragment was generated endogenously and translocated to the nucleus. This multiply phosphorylated unstructured domain may act as a signaling molecule that relays information from secretory granules to both cytosol and nucleus.
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Affiliation(s)
- Chitra Rajagopal
- Department of Molecular, Microbial, and Structural Biology, University of Connecticut Health Center, Farmington, Connecticut 06030, USA
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Stone KL, Williams KR. Enzymatic digestion of proteins in gels for mass spectrometric identification and structural analysis. ACTA ACUST UNITED AC 2008; Chapter 11:11.3.1-11.3.10. [PMID: 18429249 DOI: 10.1002/0471140864.ps1103s38] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Enzymatic digestion of proteins is a key technique used in protein identification. By combining the digestion with mass spectrometric detection, proteins at very low femtomole levels, and in some cases subfemtomole levels, can be identified. Typically, one- or two-dimensional SDS-PAGE is used to isolate the proteins of interest, followed by staining with Coomassie blue, digestion-compatible silver stain, or Sypro Ruby for detection. Two-dimensional (2-D) fluorescence difference gel electrophoresis (DIGE), which uses Cy3 and Cy5 dyes for detection, allows comparison of two different sample states in order to locate proteins that are up- or down-regulated. In each case, an in-gel digestion, usually tryptic, is used with mass spectrometry to identify these proteins of interest. For large numbers of gel spots, robotic digestion can save time and money.
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Affiliation(s)
- Kathryn L Stone
- W.M. Keck Foundation Biotechnology Resource Laboratory, Yale University School of Medicine, New Haven, Connecticut, USA
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Stone KL, Bjornson RD, Blasko GG, Bruce C, Cofrancesco R, Carriero NJ, Colangelo CM, Crawford JK, Crawford JM, daSilva NC, Deluca JD, Elliott JI, Elliott MM, Flory PJ, Folta-Stogniew EJ, Gulcicek E, Kong Y, Lam TT, Lee JY, Lin A, LoPresti MB, Mane SM, McMurray WJ, Tikhonova IR, Westman S, Williams NA, Wu TL, Hongyu Z, Williams KR. Keck Foundation Biotechnology Resource Laboratory, Yale University. Yale J Biol Med 2007; 80:195-211. [PMID: 18449392 PMCID: PMC2347368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kathryn L. Stone
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Robert D. Bjornson
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Gregory G. Blasko
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Can Bruce
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Renee Cofrancesco
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Nicholas J. Carriero
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Christopher M. Colangelo
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Janet K. Crawford
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - J. Myron Crawford
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Nancy C. daSilva
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Joseph D. Deluca
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - James I. Elliott
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Margaret M. Elliott
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - P. John Flory
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Ewa J. Folta-Stogniew
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Erol Gulcicek
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Yong Kong
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - TuKiet T. Lam
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Ji Y. Lee
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Aiping Lin
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Mary B. LoPresti
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Shrikant M. Mane
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Walter J. McMurray
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Irina R. Tikhonova
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Sheila Westman
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Nancy A. Williams
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Terence L. Wu
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Zhao Hongyu
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
| | - Kenneth R. Williams
- Keck Foundation Biotechnology Resource Laboratory, Yale University, 300 George Street, New Haven, Connecticut
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Shifman MA, Li Y, Colangelo CM, Stone KL, Wu TL, Cheung KH, Miller PL, Williams KR. YPED: a web-accessible database system for protein expression analysis. J Proteome Res 2007; 6:4019-24. [PMID: 17867667 PMCID: PMC3863627 DOI: 10.1021/pr070325f] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [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] [Indexed: 12/16/2022]
Abstract
We have developed an integrated web-accessible software system called the Yale Protein Expression Database (YPED) to address the need for storage, retrieval, and integrated analysis of large amounts of data from high throughput proteomic technologies. YPED is an open source system which integrates gel analysis results with protein identifications from DIGE experiments. The system associates the DIGE gel spots and image, analyzed with DeCyder, with mass spectrometric protein identifications from selected gel spots. Following in gel trypsin digestion, proteins in spots of interest are analyzed using MALDI-TOF/TOF on an AB 4700 or, more recently, on an AB 4800 with protein identifications performed by Mascot in conjunction with the AB GPS Explorer system. In addition to DIGE, YPED currently handles protein identifications from MudPIT, iTRAQ, and ICAT experiments. Sample descriptions are compatible with the evolving MIAPE standards. Tandem MS/MS results from MudPIT, and ICAT analyses are validated with the Trans-Proteomic Pipeline and then stored in the database for viewing and linking to the identified proteins. Researchers can view, subset, and download their data through a secure Web interface that includes a table containing proteins identified, a sample summary, the sample description, and a clickable gel image for DIGE samples. Tools are available to facilitate sample comparison and the viewing of phosphoproteins. A summary report with PANTHER Classification System annotations is also available to aid in biological interpretation of the results. The source code is open-source and is available from http://yped.med.yale.edu/yped_dist.
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Affiliation(s)
- Mark A Shifman
- Center for Medical Informatics, Department of Anesthesiology, Yale University, New Haven, Connecticut 06520, USA.
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Abstract
OBJECTIVE To determine whether longitudinal cognitive decline is associated with increased risk of sleep disturbance in older, nondemented, community-dwelling women. METHODS We studied 2,474 women (mean age 68.9 years) who were part of a prospective study started in 1986; women with baseline or follow-up evidence of possible dementia were excluded. Cognitive data were gathered over 15 years for modified Mini-Mental State Examination (mMMSE) and 13 years for Trails B; cognitive decline was defined as declining >1.5 SDs on the mMMSE (> or =3 points) or Trails B (>92 seconds). Sleep disturbance was measured objectively using actigraphy (Sleepwatch-O, Ambulatory Monitoring) at the 15-year follow-up visit; measures included total sleep hours, sleep efficiency, sleep latency, napping, and time awake after sleep onset (WASO). RESULTS During follow-up, 11% of women declined on mMMSE and 15% on Trails B. Cognitive decliners were more likely than non-decliners to experience sleep disturbance at follow-up on most measures. For women who declined on mMMSE, adjusted ORs (aOR) (95% CI) were 1.71 (1.24, 2.37) for sleep efficiency <70%, 1.57 (1.12, 2.21) for sleep latency > or =1 hour, and 1.43 (1.07, 1.92) for WASO > or =90 minutes. Results were similar for women who declined on Trails B; in addition, these women were more likely to nap >2 hours per day (aOR: 1.73; 95% CI: 1.28, 2.33). Cognitive decline on either test was not associated with total sleep time. CONCLUSIONS Cognitive decline is associated with sleep disturbance in nondemented community-dwelling elderly women.
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Affiliation(s)
- K Yaffe
- Department of Psychiatry, University of California, San Francisco, and the San Francisco VA Medical Center, San Francisco, CA, USA.
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Shannon J, Shikany JM, Barrett-Connor E, Marshall LM, Bunker CH, Chan JM, Stone KL, Orwoll E. Demographic factors associated with the diet quality of older US men: baseline data from the Osteoporotic Fractures in Men (MrOS) study. Public Health Nutr 2007; 10:810-8. [PMID: 17381915 DOI: 10.1017/s1368980007258604] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Throughout the world, the proportion of the male population aged 65 years and older is increasing. Yet, we have limited information regarding diet quality and predictors of diet quality in this segment of the population. The objectives of the current analyses are to describe the diet quality of a cohort of men >65 years of age, and identify lifestyle factors associated with poor diet quality. METHODS We present a cross-sectional analysis of the diet quality of 5928 men, aged 65-100 years, who are participants in the Osteoporotic Fractures in Men (MrOS) cohort study. Dietary intake was determined using a modified Block 98 food-frequency questionnaire. Diet quality was calculated using the previously validated Diet Quality Index-Revised (DQI-R). Univariate and multivariate modelling was used to estimate the variance in diet quality predicted by a number of sociodemographic factors, including age, race/ethnicity, body mass index (BMI), marital status, education, smoking status, physical activity, self-perceived health and nutritional supplement use. RESULTS Overall, we found that in this geographically diverse group of older men, diet quality was low, with a mean modified DQI-R for the entire study population of 62.5 (standard deviation 13.1) out of an ideal of 100. Further, younger age, very low total calorie intake (< or = 1187 kcal day- 1), higher BMI, residence in a North or Southeast community, being of African-American or Hispanic race, being less educated, not using dietary supplements and smoking were each significant independent predictors of a poorer diet. CONCLUSION These data may prove useful in both understanding the dietary intake of older US men as it relates to published dietary guidelines, and for targeting future dietary intervention programmes.
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Affiliation(s)
- J Shannon
- Oregon Health and Science University, Portland, OR, USA.
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Seo JK, Crawford JM, Stone KL, Noga EJ. Purification of a novel arthropod defensin from the American oyster, Crassostrea virginica. Biochem Biophys Res Commun 2005; 338:1998-2004. [PMID: 16297885 DOI: 10.1016/j.bbrc.2005.11.013] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2005] [Accepted: 11/02/2005] [Indexed: 11/29/2022]
Abstract
An antimicrobial peptide was purified from acidified gill extract of a bivalve mollusk, the American oyster (Crassostrea virginica), by preparative acid-urea--polyacrylamide gel electrophoresis and reversed-phase high performance liquid chromatography. The 4265.0 Da peptide had 38 amino acids, including 6 cysteines. It showed strongest activity against Gram-positive bacteria (Lactococcus lactis subsp. lactis and Staphylococcus aureus; minimum effective concentrations [MECs] 2.4 and 3.0 microg/ml, respectively) but also had significant activity against Gram-negative bacteria (Escherichia coli D31 and Vibrio parahemolyticus; MECs 7.6 and 15.0 microg/ml, respectively). Comparison of the amino acid sequence with those of other known antimicrobial peptides revealed that the novel peptide had high sequence homology to arthropod defensins, including those from other bivalves, the mussels Mytilus edulis and Mytilus galloprovincialis. This is the first antimicrobial peptide to be isolated from any oyster species and we have named it American oyster defensin (AOD).
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Affiliation(s)
- Jung-Kil Seo
- Department of Clinical Sciences, College of Veterinary Medicine North Carolina State University, 4700 Hillsborough Street, Raleigh, NC 27606, USA
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Moffett SP, Zmuda JM, Oakley JI, Beck TJ, Cauley JA, Stone KL, Lui LY, Ensrud KE, Hillier TA, Hochberg MC, Morin P, Peltz G, Greene D, Cummings SR. Tumor necrosis factor-alpha polymorphism, bone strength phenotypes, and the risk of fracture in older women. J Clin Endocrinol Metab 2005; 90:3491-7. [PMID: 15797957 DOI: 10.1210/jc.2004-2235] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
TNFalpha is a proinflammatory cytokine that promotes osteoclastic bone resorption. We evaluated the association between a G-308A polymorphism (rs1800629) at the TNFA locus and osteoporosis phenotypes in 4306 older women participating in the Study of Osteoporotic Fractures. Femoral neck bone mineral density (BMD) and structural geometry were measured using dual-energy x-ray absorptiometry and hip structural analysis. Incident fractures were confirmed by physician adjudication of radiology reports. Despite similar femoral neck BMD, women with the A/A genotype had greater subperiosteal width (P = 0.01) and endocortical diameter (P = 0.03) than those with the G/G genotype. The net result of these structural differences was that there was a greater distribution of bone mass away from the neutral axis of the femoral neck in women with the A/A genotype, resulting in greater indices of bone bending strength (cross-sectional moment of inertia: P = 0.004; section modulus: P = 0.003). Among 376 incident hip fractures during 12.1 yr of follow-up, a 22% decrease in the risk of hip fracture was seen per copy of the A allele (relative risk 0.78; 95% confidence interval 0.63, 0.96), which was not influenced by adjustments for potential confounding factors, BMD, or bone strength indices. The G-308A polymorphism was not associated with a reduced risk of other fractures. These results suggest a potential role of genetic variation in TNFalpha in the etiology of osteoporosis.
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Affiliation(s)
- S P Moffett
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, 130 DeSoto Street, Pittsburgh, Pennsylvania 15261, USA.
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Abstract
OBJECTIVE To test the hypothesis that older women with antiepileptic drug (AED) use have increased rates of bone loss. METHODS AED use was ascertained and calcaneal and hip bone mineral density (BMD) measured in a cohort of 9,704 elderly community-dwelling women enrolled in the Study of Osteoporotic Fractures, and they were followed prospectively for changes in BMD. Current use of AED was assessed by interview, with verification of use from medication containers at baseline and follow-up examinations. Women were classified as continuous users, partial (intermittent) users, or nonusers. Rates of change in BMD were measured at the total hip and two subregions (average 4.4 years between examinations) and at the calcaneus (average 5.7 years between examinations). RESULTS After adjustment for confounders, the average rate of decline in total hip BMD steadily increased from -0.70%/year in nonusers to -0.87%/year in partial AED users to -1.16%/year in continuous AED users (p value for trend = 0.015). Higher rates of bone loss were also observed among continuous AED users at subregions of the hip and at the calcaneus. In particular, continuous phenytoin users had an adjusted 1.8-fold greater mean rate of loss at the calcaneus compared with nonusers of AED (-2.68 vs -1.46%/year; p < 0.001) and an adjusted 1.7-fold greater mean rate of loss at the total hip compared with nonusers of AED (-1.16 vs -0.70%/year; p = 0.069). CONCLUSIONS Continuous AED use in elderly women is associated with increased rates of bone loss at the calcaneus and hip. If unabated, the rate of hip bone loss among continuous AED users is sufficient to increase the risk of hip fracture by 29% over 5 years among women age 65 years and older.
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Affiliation(s)
- K E Ensrud
- Department of Medicine and Center for Chronic Disease Outcomes Research, VA Medical Center, Minneapolis, MN 55417, USA.
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Affiliation(s)
- K R Williams
- W. M. Keck Foundation Biotechnology Resource Laboratory, Yale University, New Haven, CT, USA
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Kado DM, Duong T, Stone KL, Ensrud KE, Nevitt MC, Greendale GA, Cummings SR. Incident vertebral fractures and mortality in older women: a prospective study. Osteoporos Int 2003; 14:589-94. [PMID: 12827222 DOI: 10.1007/s00198-003-1412-5] [Citation(s) in RCA: 188] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2002] [Accepted: 02/19/2003] [Indexed: 10/26/2022]
Abstract
Older persons who have prevalent vertebral fractures have an increased risk of mortality. It is not known whether incident vertebral fractures are also associated with an increased risk of mortality. To determine whether older women with incident vertebral fractures have an increased risk of mortality, we conducted a prospective cohort study of 7233 community-dwelling older women aged 65 years or older who were enrolled in the Study of Osteoporotic Fractures. We measured incident vertebral fractures by radiographic morphometry of paired lateral spine X-rays taken an average of 3.7 years apart. We also collected information on baseline prevalent vertebral fractures; calcaneal bone density; anthropometric measures; and demographic, medical history, and lifestyle variables. Overall mortality was assessed and confirmed by receipt of death certificates. Over an average of 3.7 years, 389 (5.4%) women developed at least one incident vertebral fracture. During an additional 8 years of follow-up, 1617 (22%) women died. Women with at least one new fracture had an age-adjusted 32% increased risk of mortality (RH=1.32; 95% CI=1.10-1.58, P=0.003) compared to those without incident vertebral fractures. After adjustment for weight loss, physical frailty markers, and nine other predictors of mortality, there was no longer an independent association between incident vertebral fractures and mortality (RH=1.06; 95% CI=0.88 1.28). Older women with incident vertebral fractures have an increased risk of mortality that may be explained by weight loss and physical frailty.
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Affiliation(s)
- D M Kado
- Division of Geriatrics, Department of Medicine, The David Geffen School of Medicine at University of California, 10945 Le Conte Avenue, Suite 2339, Los Angeles, CA 90095, USA.
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Beck TJ, Stone KL, Oreskovic TL, Hochberg MC, Nevitt MC, Genant HK, Cummings SR. Effects of current and discontinued estrogen replacement therapy on hip structural geometry: the study of osteoporotic fractures. J Bone Miner Res 2001; 16:2103-10. [PMID: 11697807 DOI: 10.1359/jbmr.2001.16.11.2103] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
It is assumed that estrogen influences bone strength and risk of fractures by affecting bone mineral density (BMD). However, estrogen may influence the mechanical strength of bones by altering the structural geometry in ways that may not be apparent in the density. Repeated dual energy X-ray absorptiometry (DXA) hip scan data were analyzed for bone density and structural geometry in elderly women participating in the Study of Osteoporotic Fractures (SOF). Scans were studied with a hip structural analysis program for the effects of estrogen replacement therapy (ERT) on BMD and structural geometry. Of the 3,964 women with ERT-use data, 588 used ERT at both the start and end of the approximately 3.5-year study, 1,203 had past use which was discontinued by clinic visit 4, and 2,163 women had never used ERT. All groups lost BMD at the femoral neck, but the reduced BMD among users of ERT was entirely due to subperiosteal expansion and not bone loss, whereas both bone loss and expansion occurred in past or nonusers. BMD increased 0.8%/year at the femoral shaft among ERT users but decreased 0.8%/year among nonusers. Section moduli increased at both the neck and shaft among ERT users but remained unchanged in past and nonusers. Current, but not past, use of estrogen therapy in elderly women seems to increase mechanical strength of the proximal femur by improving its geometric properties. These effects are not evident from changes in femoral neck BMD.
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Affiliation(s)
- T J Beck
- Department of Radiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Sebastian A, Sellmeyer DE, Stone KL, Cummings SR. Dietary ratio of animal to vegetable protein and rate of bone loss and risk of fracture in postmenopausal women. Am J Clin Nutr 2001; 74:411-2. [PMID: 11522569 DOI: 10.1093/ajcn/74.3.411] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Beck TJ, Oreskovic TL, Stone KL, Ruff CB, Ensrud K, Nevitt MC, Genant HK, Cummings SR. Structural adaptation to changing skeletal load in the progression toward hip fragility: the study of osteoporotic fractures. J Bone Miner Res 2001; 16:1108-19. [PMID: 11393788 DOI: 10.1359/jbmr.2001.16.6.1108] [Citation(s) in RCA: 189] [Impact Index Per Article: 8.2] [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] [Indexed: 11/18/2022]
Abstract
Longitudinal, dual-energy X-ray absorptiometry (DXA) hip data from 4187 mostly white, elderly women from the Study of Osteoporotic Fractures were studied with a structural analysis program. Cross-sectional geometry and bone mineral density (BMD) were measured in narrow regions across the femoral neck and proximal shaft We hypothesized that altered skeletal load should stimulate adaptive increases or decreases in the section modulus (bending strength index) and that dimensional details would provide insight into hip fragility. Weight change in the approximately 35 years between scan time points was used as the primary indicator of altered skeletal load. "Static" weight was defined as within 5% of baseline weight, whereas "gain" and 'loss" were those who gained or lost >5%, respectively. In addition, we used a frailty index to better identify those subjects undergoing changing in skeletal loading. Subjects were classified as frail if unable to rise from a chair five times without using arm support. Subjects who were both frail and lost weight (reduced loading) were compared with those who were not frail and either maintained weight (unchanged loading) or gained weight (increased loading). Sixty percent of subjects (n = 2,559) with unchanged loads lost BMD at the neck but not at the shaft, while section moduli increased slightly at both regions. Subjects with increasing load (n = 580) lost neck BMD but gained shaft BMD; section moduli increased markedly at both locations. Those with declining skeletal loads (n = 105) showed the greatest loss of BMD at both neck and shaft; loss at the neck was caused by both increased loss of bone mass and greater subperiosteal expansion; loss in shaft BMD decline was only caused by greater loss of bone mass. This group also showed significant declines in section modulus at both sites. These results support the contention that mechanical homeostasis in the hip is evident in section moduli but not in bone mass or density. The adaptive response to declining skeletal loads, with greater rates of subperiosteal expansion and cortical thinning, may increase fragility beyond that expected from the reduction in section modulus or bone mass alone.
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Affiliation(s)
- T J Beck
- Department of Radiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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