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  1. Article ; Online: Vascular Calcification and Osteoprotegrin in Chronic Kidney Disease.

    Lenhard, M James / Maser, Raelene E

    American journal of nephrology

    2017  Volume 46, Issue 1, Page(s) 37–38

    MeSH term(s) Biomarkers/blood ; Humans ; Kidney Failure, Chronic/complications ; Kidney Failure, Chronic/therapy ; Osteoprotegerin/blood ; Renal Dialysis/adverse effects ; Vascular Calcification/blood ; Vascular Calcification/etiology
    Chemical Substances Biomarkers ; Osteoprotegerin
    Language English
    Publishing date 2017-06-15
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 604540-6
    ISSN 1421-9670 ; 0250-8095
    ISSN (online) 1421-9670
    ISSN 0250-8095
    DOI 10.1159/000477381
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Vascular Calcification and Osteoprotegrin in Chronic Kidney Disease

    Lenhard, M. James / Maser, Raelene E.

    American Journal of Nephrology

    2017  Volume 46, Issue 1, Page(s) 37–38

    Institution Diabetes and Metabolic Research Center, Christiana Care Health System, and Department of Medical Laboratory Sciences, University of Delaware, Newark, and Diabetes and Metabolic Diseases Center, Christiana Care Health System, Wilmington, DE, USA
    Language English
    Publishing date 2017-06-15
    Publisher S. Karger AG
    Publishing place Basel, Switzerland
    Document type Article
    Note Editorial
    ZDB-ID 604540-6
    ISSN 1421-9670 ; 0250-8095
    ISSN (online) 1421-9670
    ISSN 0250-8095
    DOI 10.1159/000477381
    Database Karger publisher's database

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  3. Article ; Online: Osteopontin and osteoprotegerin levels in type 2 diabetes and their association with cardiovascular autonomic function.

    Maser, Raelene E / Lenhard, M James / Pohlig, Ryan T / Balagopal, P Babu

    Journal of diabetes and its complications

    2016  Volume 30, Issue 3, Page(s) 507–510

    Abstract: ... breathing (i.e., mean circular resultant (MCR) and expiration/inspiration (E/I) ratio) was used to assess ... multiple linear regression analysis with MCR or E/I ratio as the dependent variable, OPN was independently ... 598, p<0.001; E/I model R2=0.594, p<0.001).: Conclusion: Our results suggest that OPN is associated ...

    Abstract Aims: Osteopontin (OPN) and osteoprotegerin (OPG) are bone metabolism biomarkers potentially associated with nerve function. We evaluated the association of cardiovascular autonomic nerve function, OPN, and OPG in 50 individuals with type 2 diabetes mellitus (T2DM).
    Methods: RR-variation during deep breathing (i.e., mean circular resultant (MCR) and expiration/inspiration (E/I) ratio) was used to assess parasympathetic nerve function. Participants' demographics, HbA1c, 25-hydroxyvitamin D (25(OH)D), BMI, HOMA-IR, calcium, parathyroid hormone, creatinine, OPN, and OPG were determined.
    Results: Using stepwise multiple linear regression analysis with MCR or E/I ratio as the dependent variable, OPN was independently associated with reduced autonomic function. A previous report showed a significant association of cardiovascular autonomic function with age, 25(OH)D insufficiency, and the interaction of age×25(OH)D insufficiency. Here we report a novel association for OPN and its interaction with age indicating that for those who are younger, elevated OPN levels are related to a greater loss of autonomic function (MCR model R2=0.598, p<0.001; E/I model R2=0.594, p<0.001).
    Conclusion: Our results suggest that OPN is associated with reduced parasympathetic function, particularly in younger individuals with T2DM. Further studies are needed to determine if OPN is neuroprotective, involved in the pathogenesis of autonomic dysfunction, or a bystander.
    MeSH term(s) Adult ; Autonomic Nervous System/physiopathology ; Biomarkers/blood ; Cardiovascular System/physiopathology ; Diabetes Mellitus, Type 2/blood ; Diabetes Mellitus, Type 2/physiopathology ; Female ; Humans ; Male ; Middle Aged ; Osteopontin/blood ; Osteoprotegerin/blood ; Respiration ; Young Adult
    Chemical Substances Biomarkers ; Osteoprotegerin ; SPP1 protein, human ; TNFRSF11B protein, human ; Osteopontin (106441-73-0)
    Language English
    Publishing date 2016-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1105840-7
    ISSN 1873-460X ; 1056-8727
    ISSN (online) 1873-460X
    ISSN 1056-8727
    DOI 10.1016/j.jdiacomp.2015.12.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Pre-heparin lipoprotein lipase mass as a potential mediator in the association between adiponectin and HDL-cholesterol in type 2 diabetes.

    Maser, Raelene E / Lenhard, M James / Pohlig, Ryan T / Balagopal, P Babu

    Journal of clinical & translational endocrinology

    2016  Volume 7, Page(s) 7–11

    Abstract: Aim: Lipoprotein lipase (LPL) is a major enzyme in lipid metabolism. Dyslipidemia, characterized by decreased high-density lipoprotein cholesterol (HDL-C), is prevalent in persons with type 2 diabetes mellitus (T2DM). The aim of this study was to ... ...

    Abstract Aim: Lipoprotein lipase (LPL) is a major enzyme in lipid metabolism. Dyslipidemia, characterized by decreased high-density lipoprotein cholesterol (HDL-C), is prevalent in persons with type 2 diabetes mellitus (T2DM). The aim of this study was to determine whether pre-heparin LPL mass mediates the association between adiponectin and HDL-C in individuals with T2DM.
    Methods: Pre-heparin LPL mass was measured via an enzyme-linked immunosorbent assay, adiponectin by radioimmunoassay, and HDL-C was determined enzymatically. Participants' (n = 50) demographics, HbA1c, adiposity, homeostasis model assessment for insulin resistance (HOMA-IR), serum creatinine, and lipids were measured. Path analysis was utilized to test whether pre-heparin LPL mass is a mediator in the relationship between adiponectin and HDL-C.
    Results: All four criteria for mediation were satisfied in the path analysis. The indirect effect of adiponectin on HDL-C through pre-heparin LPL mass was significant, p = 0.001, whereas the direct effect of adiponectin on HDL-C was not significant, p = 0.074. These results remained consistent even after adjustments for age, gender, body mass index, HOMA-IR, and serum creatinine in the model.
    Conclusion: The findings in this study suggest that pre-heparin LPL mass may mediate the association between adiponectin and HDL-C in T2DM. This relationship for measures of HDL-C functionality requires future investigation.
    Language English
    Publishing date 2016-12-10
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2834222-7
    ISSN 2214-6237
    ISSN 2214-6237
    DOI 10.1016/j.jcte.2016.12.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Autonomic modulation in gestational diabetes mellitus.

    Maser, Raelene E / Lenhard, M James / Kolm, Paul

    Journal of diabetes and its complications

    2014  Volume 28, Issue 5, Page(s) 684–688

    Abstract: Aims: The aim of this study was to evaluate the influence of gestational diabetes mellitus (GDM) and positional aortocaval compression on cardiovascular autonomic nervous system (ANS) function in late pregnancy.: Methods: Pregnant women with (n=31) ... ...

    Abstract Aims: The aim of this study was to evaluate the influence of gestational diabetes mellitus (GDM) and positional aortocaval compression on cardiovascular autonomic nervous system (ANS) function in late pregnancy.
    Methods: Pregnant women with (n=31) and without (n=12) GDM were evaluated at 30-35weeks gestation and 2-3months postpartum. Measures of ANS function included power spectral analysis (performed sitting) and RR-variation during deep breathing (performed supine). Time-related changes (late pregnancy versus 2-3months postpartum) for measurements of cardiovascular ANS function were analyzed using multivariate analysis of variance for repeated measures.
    Results: Baseline characteristics were similar for both groups. Comparing ANS measures for GDM+versus GDM- women during pregnancy and postpartum revealed no significant differences. Time related changes indicated that during late pregnancy total spectral power, low frequency (LF) power, high frequency (HF) power, and RR-variation during deep breathing were significantly reduced (p<0.001 for all). The LF/HF ratio, however, was not significantly affected during late pregnancy (p=0.678).
    Conclusions: Our results suggest decreased activity in both branches of the ANS during mid-third trimester pregnancy, but no significant change in sympathovagal balance. Aortocaval compression appears to affect ANS function whether tests were performed sitting or supine for GDM+and GDM- women.
    MeSH term(s) Adolescent ; Adult ; Autonomic Nervous System/physiopathology ; Cardiovascular System/physiopathology ; Diabetes, Gestational/physiopathology ; Female ; Follow-Up Studies ; Heart Rate/physiology ; Humans ; Postpartum Period/physiology ; Posture ; Pregnancy ; Pregnancy Trimester, Third ; Supine Position/physiology ; Young Adult
    Language English
    Publishing date 2014-09
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1105840-7
    ISSN 1873-460X ; 1056-8727
    ISSN (online) 1873-460X
    ISSN 1056-8727
    DOI 10.1016/j.jdiacomp.2014.05.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Vitamin D Insufficiency is Associated with Reduced Parasympathetic Nerve Fiber Function in Type 2 Diabetes.

    Maser, Raelene E / Lenhard, M James / Pohlig, Ryan T

    Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists

    2014  Volume 21, Issue 2, Page(s) 174–181

    Abstract: ... the association of cardiovascular autonomic function, 25-hydroxyvitamin D (25[OH]D) insufficiency (i.e., levels ... individuals with T2DM. Cardiovascular autonomic function (i.e., parasympathetic function) was assessed by RR ... variation during deep breathing (i.e., mean circular resultant [MCR] and expiration/inspiration [E/I] ratio ...

    Abstract Objective: Vitamin D insufficiency is prevalent in subjects with type 2 diabetes mellitus (T2DM) and is associated with peripheral neuropathy. However, there are little data regarding vitamin D status in patients with cardiovascular autonomic neuropathy. Our objective was to evaluate the association of cardiovascular autonomic function, 25-hydroxyvitamin D (25[OH]D) insufficiency (i.e., levels <30 ng/mL), and multiple metabolic parameters in subjects with T2DM.
    Methods: We examined 50 individuals with T2DM. Cardiovascular autonomic function (i.e., parasympathetic function) was assessed by RR-variation during deep breathing (i.e., mean circular resultant [MCR] and expiration/inspiration [E/I] ratio). Metabolic parameters included measures of adiposity, glycemic control, insulin resistance, calcium metabolism, and 25(OH)D.
    Results: Participants with 25(OH)D insufficiency (n = 26) were younger (66 ± 9 vs. 60 ± 10 years, P<.05), more insulin resistant, had a higher body mass index (BMI) and lower adiponectin levels. The MCR (39.5 ± 26.3 vs. 27.6 ± 17.2, P<.01) and E/I ratio (1.21 ± 0.17 vs. 1.15 ± 0.09, P<.01) were lower for those with 25(OH)D insufficiency after controlling for age. A stepwise selection procedure regressing MCR and E/I ratio on a number of metabolic parameters resulted in a model identifying age and 25(OH)D insufficiency as significant determinants for both measures. The interaction of age x 25(OH)D insufficiency was also included (MCR model, R2 = 0.491, P<.001; E/I ratio, R2 = 0.455, P<.001). Neither glycemic control nor other metabolic parameters were selected.
    Conclusion: Our results suggest that 25(OH)D insufficiency is associated with reduced parasympathetic function, with a stronger association in younger persons with T2DM. Studies are needed to determine if vitamin D supplementation into the sufficient range could prevent or delay the onset of cardiovascular autonomic dysfunction.
    MeSH term(s) Aged ; Diabetes Mellitus, Type 2/blood ; Diabetes Mellitus, Type 2/complications ; Diabetes Mellitus, Type 2/physiopathology ; Female ; Humans ; Male ; Middle Aged ; Nerve Fibers/physiology ; Parasympathetic Nervous System/physiopathology ; Vitamin D/analogs & derivatives ; Vitamin D/blood ; Vitamin D Deficiency/physiopathology
    Chemical Substances Vitamin D (1406-16-2) ; 25-hydroxyvitamin D (A288AR3C9H)
    Language English
    Publishing date 2014-10-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1473503-9
    ISSN 1530-891X
    ISSN 1530-891X
    DOI 10.4158/EP14332.OR
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Screening for asymptomatic coronary artery disease in patients with type 2 diabetes.

    Vinik, Aaron I / Maser, Raelene E

    JAMA

    2009  Volume 302, Issue 7, Page(s) 735–6; author reply 736–7

    MeSH term(s) Coronary Artery Disease/diagnostic imaging ; Coronary Artery Disease/etiology ; Diabetes Mellitus, Type 2/complications ; Diabetic Angiopathies/diagnostic imaging ; Diabetic Angiopathies/etiology ; Exercise Test ; Humans ; Myocardial Perfusion Imaging
    Language English
    Publishing date 2009-08-19
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 2958-0
    ISSN 1538-3598 ; 0254-9077 ; 0002-9955 ; 0098-7484
    ISSN (online) 1538-3598
    ISSN 0254-9077 ; 0002-9955 ; 0098-7484
    DOI 10.1001/jama.2009.1188
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Effect of parathyroidectomy on osteopontin and undercarboxylated osteocalcin in patients with primary hyperparathyroidism.

    Maser, Raelene E / Lenhard, M James / Pohlig, Ryan T / Balagopal, P Babu / Abdel-Misih, Raafat

    Endocrine research

    2017  Volume 43, Issue 1, Page(s) 21–28

    Abstract: ... with inflammatory markers (e.g., interleukin-6 [IL-6], lipocalin-2), insulin resistance (i.e., homeostasis model ... assessment for insulin resistance [HOMA-IR]), adiposity (i.e., leptin, adiponectin), PTH, calcium, 25 ...

    Abstract Purpose: Surgical treatment for primary hyperparathyroidism (PHPT) improves bone metabolism. Osteocalcin (OC) and its undercarboxylated form (ucOC) are associated with bone and energy metabolism. Osteopontin (OPN), a multifunctional protein expressed in bone, is involved in resorption, along with β-carboxyl-terminal cross-linking telopeptide of type 1 collagen (β-CTX), and osteoprotegerin (OPG). Our aim was to investigate these biomarkers of bone metabolism in patients with PHPT.
    Methods: We examined 30 individuals with PHPT, in a clinical research facility, before and 1 month following parathyroidectomy. Circulating levels of OC, ucOC, OPN, β-CTX, and OPG were examined as bone biomarkers along with inflammatory markers (e.g., interleukin-6 [IL-6], lipocalin-2), insulin resistance (i.e., homeostasis model assessment for insulin resistance [HOMA-IR]), adiposity (i.e., leptin, adiponectin), PTH, calcium, 25-hydroxyvitamin D, creatinine, and demographics.
    Results: Participants (27 females/3 males) were 60 ± 9 (mean±SD) years old. There was a significant reduction of ucOC (7.9 ± 5.1 [median±SIQR] vs. 6.6 ± 3.7 ng/mL, p = 0.022) and OPN (75.4 ± 14.5 vs. 54.5 ± 9.2 ng/mL, p < 0.001) pre- versus post-parathyroidectomy. There were no univariate differences postoperatively for IL-6, HOMA-IR, leptin, or adiponectin. Regression analysis showed that postoperative levels of adiponectin, IL-6, and OPN were significantly associated with ucOC, while adjusting for PTH and albumin corrected calcium levels (model R
    Conclusion: The lower 1-month postoperative OPN and ucOC levels in PHPT seem to indicate reduced bone resorption. Decreased ucOC levels may also suggest lower energy demands postoperatively.
    MeSH term(s) Adiponectin/blood ; Aged ; Female ; Follow-Up Studies ; Humans ; Hyperparathyroidism, Primary/blood ; Hyperparathyroidism, Primary/surgery ; Insulin Resistance/physiology ; Interleukin-6/blood ; Leptin/blood ; Male ; Middle Aged ; Osteocalcin/blood ; Osteopontin/blood ; Osteoprotegerin/blood ; Parathyroidectomy
    Chemical Substances ADIPOQ protein, human ; Adiponectin ; IL6 protein, human ; Interleukin-6 ; Leptin ; Osteoprotegerin ; SPP1 protein, human ; TNFRSF11B protein, human ; Osteocalcin (104982-03-8) ; Osteopontin (106441-73-0)
    Language English
    Publishing date 2017-09-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 605823-1
    ISSN 1532-4206 ; 0743-5800
    ISSN (online) 1532-4206
    ISSN 0743-5800
    DOI 10.1080/07435800.2017.1369432
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Osteopontin and clusterin levels in type 2 diabetes mellitus: differential association with peripheral autonomic nerve function.

    Maser, Raelene E / James Lenhard, M / Pohlig, Ryan T / Babu Balagopal, P

    Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology

    2017  Volume 38, Issue 9, Page(s) 1645–1650

    Abstract: ... of this study was to investigate the potential relationship of OPN and clusterin with sudomotor function (i.e ... feet. Demographics (e.g., age, gender, race, body mass index (BMI)), HbA1c, 25-hydroxyvitamin D ...

    Abstract Osteopontin (OPN) and clusterin are secreted glycoproteins potentially associated with nerve function. Sudomotor dysfunction is associated with the development of foot ulcerations. The purpose of this study was to investigate the potential relationship of OPN and clusterin with sudomotor function (i.e., autonomic nerves that control sweating) in participants with type 2 diabetes mellitus (T2DM). Sudomotor function was assessed using SUDOSCAN® which measures electrochemical skin conductance (ESC) of the hands and feet. Demographics (e.g., age, gender, race, body mass index (BMI)), HbA1c, 25-hydroxyvitamin D, creatinine, OPN, and clusterin were also determined for the participants. Fifty individuals with T2DM (age = 59±11 years; 23/27 male/female; 13 African Americans) participated in this study. Lower ESC for the hands and feet were observed in African Americans versus Caucasians/Asians (p < 0.05). No significant ESC differences were observed for good [HbA1c <7%] versus poor [HbA1c ≥7%] glycemic control. With regard to gender, ESC values were lower for the hands for females (p < 0.05). In linear regression with ESC for the hands or feet as the dependent variable, increased OPN levels, but not clusterin, were independently associated with reduced sudomotor function while adjusting for age, gender, race, BMI, and glycemic control (ESC hands model R
    MeSH term(s) Autonomic Nervous System/metabolism ; Autonomic Nervous System Diseases/blood ; Autonomic Nervous System Diseases/ethnology ; Clusterin/blood ; Cross-Sectional Studies ; Diabetes Mellitus, Type 2/blood ; Diabetes Mellitus, Type 2/ethnology ; Diabetic Neuropathies/blood ; Diabetic Neuropathies/ethnology ; Female ; Foot/physiopathology ; Galvanic Skin Response/physiology ; Glycated Hemoglobin/metabolism ; Hand/physiopathology ; Humans ; Linear Models ; Male ; Middle Aged ; Osteopontin/blood ; Sweating/physiology ; Vitamin D/analogs & derivatives ; Vitamin D/blood
    Chemical Substances CLU protein, human ; Clusterin ; Glycated Hemoglobin A ; SPP1 protein, human ; hemoglobin A1c protein, human ; Osteopontin (106441-73-0) ; Vitamin D (1406-16-2) ; 25-hydroxyvitamin D (A288AR3C9H)
    Language English
    Publishing date 2017-06-21
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 2016546-8
    ISSN 1590-3478 ; 1590-1874
    ISSN (online) 1590-3478
    ISSN 1590-1874
    DOI 10.1007/s10072-017-3019-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Neuropathy: the crystal ball for cardiovascular disease?

    Vinik, Aaron I / Maser, Raelene E / Ziegler, Dan

    Diabetes care

    2010  Volume 33, Issue 7, Page(s) 1688–1690

    MeSH term(s) Cardiovascular Diseases/epidemiology ; Diabetes Mellitus, Type 2/epidemiology ; Diabetic Neuropathies/epidemiology ; Humans ; Risk Factors
    Language English
    Publishing date 2010-06-28
    Publishing country United States
    Document type Comment ; Editorial
    ZDB-ID 441231-x
    ISSN 1935-5548 ; 0149-5992
    ISSN (online) 1935-5548
    ISSN 0149-5992
    DOI 10.2337/dc10-0745
    Database MEDical Literature Analysis and Retrieval System OnLINE

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