Plasma 25-Hydroxyvitamin D Concentrations and Serum and Salivary C-Reactive Protein in the Osteoporosis and Periodontal Disease Study

Vitamin D has been hypothesized to play an important role in preventing the development and progression of periodontal disease, but the underlying immune modulatory mechanisms remain understudied. We examined the cross-sectional association between biomarkers of vitamin D status and C-reactive protein (CRP) among postmenopausal women aged 53–81 years. Linear regression was used to examine the association between plasma 25-hydroxyvitamin D (25[OH]D) concentrations, a biomarker of vitamin D status, and both salivary and serum CRP concentrations in 567 women from the Buffalo Osteoporosis and Periodontal Disease (OsteoPerio) Study (1997–2000). CRP concentrations were measured with multiplex arrays and transformed for normality using the natural log. Concentrations above and below the limit of detection were included in analysis as right- and left-censored observations. An inverse association was observed between 25(OH)D and salivary CRP in a model adjusted for age, smoking status, frequency of tooth brushing and flossing, and hormone therapy use (−7.56% difference in salivary CRP concentrations per 10 nmol/L increase in 25(OH)D, 95% CI: −12.78 to −2.03). Further adjustment for percent body fat attenuated this association (−2.48%, 95% CI: −7.88 to 3.24). No significant associations were found between 25(OH)D and serum CRP. Plasma vitamin D concentrations were not associated with salivary or serum CRP concentrations in this cohort of postmenopausal women.

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Deficiency of 25-Hydroxyvitamin D and Dyslipidemia in Indian Subjects

Journal of Lipids ◽

10.1155/2013/623420 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 20

Author(s):

Jaydip Ray Chaudhuri ◽

K. Rukmini Mridula ◽

Alluri Anamika ◽

Demudu Babu Boddu ◽

Pradeep Kumar Misra ◽

...

Keyword(s):

Vitamin D ◽

Alkaline Phosphatase ◽

Vitamin D Deficiency ◽

Serum Glucose ◽

C Reactive Protein ◽

Hydroxyvitamin D ◽

Reactive Protein ◽

Calcium Phosphorus ◽

25 Hydroxyvitamin D ◽

Chemiluminescent Microparticle Immunoassay

Background. Vitamin D deficiency is widespread throughout the world. Several reports have incriminated vitamin D deficiency as the cause of rickets, osteomalacia, and other chronic diseases. Recent studies have suggested a possible link between deficiency of 25-hydroxyvitamin D and dyslipidemia.Aim. To investigate the association between 25-hydroxyvitamin D deficiency and dyslipidemia in Indian subjects.Methodology. We recruited 150 asymptomatic consecutive subjects from patients’ attendees at the Departments of Neurology and Medicine in Yashoda Hospital, Hyderabad, India. Study period was from October 2011 to March 2012. All subjects underwent 25-hydroxyvitamin D assay by chemiluminescent microparticle immunoassay, fasting blood sugar and lipid profile, calcium, phosphorus, alkaline phosphatase, and C-reactive protein (CRP).Results. Out of 150 subjects, men were 82 (54.6%), and mean age was 49.4 (±15.6) years. Among risk factors, hypertension was noted in 63/150 (42%), 25-hydroxyvitamin D deficiency in 59/150 (39.3%), diabetes in 45/150 (30%), dyslipidemia in 60 (40%), smoking in 35/150 (23.3%), and alcoholism in 27/150 (18%). Deficiency of 25-hydroxyvitamin D was significantly associated with dyslipidemia (P=0.0001), mean serum glucose (P=0.0002) mean CRP (P=0.04), and mean alkaline phosphatase (P=0.01). Multivariate analysis showed that 25-hydroxyvitamin D deficiency was independently associated with dyslipidemia (odds ratio: 1.9; 95% CI : 1.1–3.5).Conclusions. We found that deficiency of 25-hydroxyvitamin D was independently associated with dyslipidemia in Indian subjects.

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Associations of 25 Hydroxyvitamin D and High Sensitivity C-reactive Protein Levels in Early Life

Nutrients ◽

10.3390/nu14010015 ◽

2021 ◽

Vol 14 (1) ◽

pp. 15

Author(s):

Nicklas Brustad ◽

Nadia R. Fink ◽

Jakob Stokholm ◽

Klaus Bønnelykke ◽

Nilofar V. Følsgaard ◽

...

Keyword(s):

Vitamin D ◽

Early Life ◽

High Sensitivity ◽

Low Grade ◽

C Reactive Protein ◽

Cross Sectional ◽

Hydroxyvitamin D ◽

Reactive Protein ◽

25 Hydroxyvitamin D ◽

Hs Crp

Vitamin D deficiency and elevated high sensitivity C-reactive protein (hs-CRP) have been associated with several health outcomes, but knowledge on early life trajectories and association between 25 hydroxyvitamin D (25(OH)D) and hs-CRP is lacking. We investigated the association between longitudinal measurements of 25(OH)D and hs-CRP, respectively, from pregnancy to childhood and throughout childhood in two Danish mother–child cohorts—the COPSAC2010 and COPSAC2000. In COPSAC2010, there was an association between 25(OH)D concentrations at week 24 in pregnancy and at age 6 months in childhood (n = 633): estimate (95% CI); 0.114 (0.041;0.187), p = 0.002, and between 25(OH)D at age 6 months and 6 years (n = 475): 0.155 (0.083;0.228), p < 0.001. This was also demonstrated in the COPSAC2000 cohort between 25(OH)D concentrations in cord blood and at age 4 years (n = 188): 0.294 (0.127;0.461), p < 0.001 and at age 6 months and 4 years (n = 264): 0.260 (0.133;0.388), p < 0.001. In COPSAC2000, we also found an association between hs-CRP at age 6 months and 12 years in childhood (n = 232): 0.183 (0.076;0.289), p < 0.001. Finally, we found a negative association between the cross-sectional measurements of 25(OH)D and hs-CRP at age 6 months (n = 613) in COPSAC2010: −0.004 (−0.008;−0.0004), p = 0.030, but this was not replicated in COPSAC2000. In this study, we found evidence of associations across timepoints of 25(OH)D concentrations from mid-pregnancy to infancy and through childhood and associations between hs-CRP levels during childhood, although with weak correlations. We also found a negative cross-sectional association between 25(OH)D and hs-CRP concentrations in COPSAC2010 proposing a role of vitamin D in systemic low-grade inflammation, though this association was not present in COPSAC2000.

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Distribution and Determinants of Vitamin D-Binding Protein, Total, “Non-Bioavailable”, Bioavailable, and Free 25-Hydroxyvitamin D Concentrations among Older Adults

Nutrients ◽

10.3390/nu13113982 ◽

2021 ◽

Vol 13 (11) ◽

pp. 3982

Author(s):

Anna Zhu ◽

Sabine Kuznia ◽

Tobias Niedermaier ◽

Bernd Holleczek ◽

Ben Schöttker ◽

...

Keyword(s):

Older Adults ◽

Vitamin D ◽

Health Outcomes ◽

Binding Protein ◽

Vitamin D Status ◽

Linear Regression Models ◽

Vitamin D Binding Protein ◽

Hydroxyvitamin D ◽

Reactive Protein ◽

25 Hydroxyvitamin D

Background: serum 25-hydroxyvitamin D (25(OH)D) (“total 25 OH(D)”) is the most commonly used indicator of vitamin D status. However, 25(OH)D is mostly bound to the vitamin D binding protein (VDBP) or albumin in blood, and it has been suggested that the remaining bioavailable or free 25(OH)D may be more relevant for vitamin D associated health outcomes. We aimed to explore distributions and determinants of VDBP, total, bioavailable, complementary “non-bioavailable”, and free 25(OH)D in a large cohort of older adults in Germany. Methods: total 25(OH)D, VDBP, and albumin concentrations were measured in blood samples of 5899 men and women aged 50–75 years and used to calculate bioavailable (and complementary “non-bioavailable”) and free 25(OH)D concentrations. Linear regression models were used to evaluate associations of potential determinants of the various vitamin D biomarkers. Results: mean concentrations of VDBP, total, non-bioavailable, bioavailable, and free 25(OH)D were 323.6 µg/mL, 49.8 nmol/L, 43.4 nmol/L, 2.5 ng/mL, and 5.7 pg/mL, respectively. Seasonal variations were observed for all markers, with peak values in spring for VDBP and in summer for total, non-bioavailable, bioavailable, and free 25(OH)D. Consistent inverse associations were seen with age and body mass index for all markers, but divergent associations were seen with C-reactive protein. Strong variations by VDBP genotypes were seen for bioavailable and free 25(OH)D, and, in opposite direction for non-bioavailable 25(OH)D. Conclusion: commonalities and differences in determinants of various markers of vitamin D status were observed, which may help to enable a better understanding of their potential role for various vitamin D related health outcomes.

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Abstract P173: Serum 25-hydroxyvitamin D and Mortality in Middle-aged Men and Women: Results from the MONICA/KORA Augsburg Study

Circulation ◽

10.1161/circ.125.suppl_10.ap173 ◽

2012 ◽

Vol 125 (suppl_10) ◽

Author(s):

Barbara Thorand ◽

Astrid Zierer ◽

Andrea Schneider ◽

Cornelia Huth ◽

Christine S Autenrieth ◽

...

Keyword(s):

Vitamin D ◽

Large Scale ◽

Inverse Association ◽

Vitamin D Status ◽

Hydroxyvitamin D ◽

Markers Of Inflammation ◽

Vitamin D Levels ◽

All Cause Mortality ◽

25 Hydroxyvitamin D ◽

Cvd Mortality

Background: Recent studies found an inverse association between vitamin D status and both morbidity and mortality from major chronic diseases such as cardiovascular diseases (CVD) and cancer. In contrast, some studies have suggested adverse health effects such as increased all-cause mortality at the high end of vitamin D levels. Therefore, the aim of the present study was to further elucidate the relationship between 25-hydroxyvitamin D (25[OH]D) and all-cause as well as CVD and non-CVD mortality. Methods: Our study population comprised 851 men and 774 women aged 35-74 years at baseline selected randomly, stratifying by sex and survey out of 9,531 subjects with available blood samples. All had participated in at least one of the three population-based MONICA/KORA Augsburg surveys between 1984-1995. Participants were followed-up for a mean of 16.8 ± 5.4 years. During this period 197 persons died from CVD (ICD9 390-459, 798) and 226 from non-cardiovascular causes. For three participants the cause of death was missing. 25[OH]D was measured in serum samples collected at baseline using an enzyme immunoassay from IDS, Frankfurt. Results: After adjustment for age, sex, survey, and season of blood sampling we observed a significant inverse association between serum 25[OH]D and all-cause mortality. The hazard ratio (HR) and 95% confidence interval (CI) comparing subjects with levels >75 nmol/l to those with levels ≤25 nmol/l was 0.59 (0.38-0.93); P trend =0.007 across the following four categories: ≤25 nmol/l; >25-≤50 nmol/l; >50-≤75 nmol/l; >75 nmol/l, assigning the median value within each category to the respective category. Further adjustment for BMI, education and lifestyle factors attenuated the association and it became non-significant (HR [95% CI]: 0.78 [0.48-1.27]; P trend =0.205). For CVD mortality, we also observed an inverse association which persisted after adjustment for the above mentioned confounders (HR [95% CI]: 0.49 [0.21-1.11]; P trend =0.012). After further multivariable adjustment including potential intermediate risk factors such as systolic blood pressure, total cholesterol/HDL-cholesterol, diabetes and markers of inflammation the association became non-significant (HR [95% CI]: 0.63 [0.26-1.51]; P trend =0.122). We did not observe any significant association between 25[OH]D and non-CVD mortality regardless of the degree of adjustment. However, there was a trend towards increased non-CVD mortality in women with 25[OH]D >75 nmol/l compared to those with concentrations ≤25 nmol/l (HR [95% CI]: 2.87 [0.99-8.33]; P trend =0.111 for the fully adjusted model). Conclusions: Our data indicate that vitamin D status is inversely related to CVD mortality. However, before large scale measures to improve vitamin D status should be initiated, further studies should evaluate potentially harmful effects of very high levels of 25[OH]D on other outcomes especially among women.

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Vitamin D and COVID-19 severity and related mortality: a prospective study in Italy

BMC Infectious Diseases ◽

10.1186/s12879-021-06281-7 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Irene Campi ◽

Luigi Gennari ◽

Daniela Merlotti ◽

Christian Mingiano ◽

Alessandro Frosali ◽

...

Keyword(s):

Vitamin D ◽

Lactate Dehydrogenase ◽

C Reactive Protein ◽

Icu Admission ◽

Hydroxyvitamin D ◽

Reactive Protein ◽

Respiratory Outcome ◽

25 Hydroxyvitamin D ◽

A Prospective Study ◽

Related Mortality

Abstract Background Vitamin D deficiency has been suggested to favor a poorer outcome of Coronavirus disease-19 (COVID-19). We aimed to assess if 25-hydroxyvitamin-D (25OHD) levels are associated with interleukin 6 (IL-6) levels and with disease severity and mortality in COVID-19. Methods We prospectively studied 103 in-patients admitted to a Northern-Italian hospital (age 66.1 ± 14.1 years, 70 males) for severely-symptomatic COVID-19. Fifty-two subjects with SARS-CoV-2 infection but mild COVID-19 symptoms (mildly-symptomatic COVID-19 patients) and 206 subjects without SARS-CoV-2 infection were controls. We measured 25OHD and IL-6 levels at admission and focused on respiratory outcome during hospitalization. Results Severely-symptomatic COVID-19 patients had lower 25OHD levels (18.2 ± 11.4 ng/mL) than mildly-symptomatic COVID-19 patients and non-SARS-CoV-2-infected controls (30.3 ± 8.5 ng/mL and 25.4 ± 9.4 ng/mL, respectively, p < 0.0001 for both comparisons). 25OHD and IL-6 levels were respectively lower and higher in severely-symptomatic COVID-19 patients admitted to intensive care Unit [(ICU), 14.4 ± 8.6 ng/mL and 43.0 (19.0–56.0) pg/mL, respectively], than in those not requiring ICU admission [22.4 ± 1.4 ng/mL, p = 0.0001 and 16.0 (8.0–32.0) pg/mL, p = 0.0002, respectively]. Similar differences were found when comparing COVID-19 patients who died in hospital [13.2 ± 6.4 ng/mL and 45.0 (28.0–99.0) pg/mL] with survivors [19.3 ± 12.0 ng/mL, p = 0.035 and 21.0 (10.5–45.9) pg/mL, p = 0.018, respectively). 25OHD levels inversely correlated with: i) IL-6 levels (ρ − 0.284, p = 0.004); ii) the subsequent need of the ICU admission [relative risk, RR 0.99, 95% confidence interval (95%CI) 0.98–1.00, p = 0.011] regardless of age, gender, presence of at least 1 comorbidity among obesity, diabetes, arterial hypertension, creatinine, IL-6 and lactate dehydrogenase levels, neutrophil cells, lymphocytes and platelets count; iii) mortality (RR 0.97, 95%CI, 0.95–0.99, p = 0.011) regardless of age, gender, presence of diabetes, IL-6 and C-reactive protein and lactate dehydrogenase levels, neutrophil cells, lymphocytes and platelets count. Conclusion In our COVID-19 patients, low 25OHD levels were inversely correlated with high IL-6 levels and were independent predictors of COVID-19 severity and mortality.

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Comparison of Vitamin D and 25-Hydroxyvitamin D Concentrations in Human Breast Milk between 1989 and 2016–2017

Nutrients ◽

10.3390/nu13020573 ◽

2021 ◽

Vol 13 (2) ◽

pp. 573

Author(s):

Naoko Tsugawa ◽

Mayu Nishino ◽

Akiko Kuwabara ◽

Honami Ogasawara ◽

Maya Kamao ◽

...

Keyword(s):

Vitamin D ◽

Breast Milk ◽

Sun Exposure ◽

Stepwise Multiple Regression ◽

Human Breast Milk ◽

Vitamin D Status ◽

Human Breast ◽

Hydroxyvitamin D ◽

Lactating Mothers ◽

25 Hydroxyvitamin D

Background: Breast milk is considered the optimal source of nutrition during infancy. Although the vitamin D concentration in human breast milk is generally considered poor for infants, vitamin D in breast milk is an important source for exclusively breastfed infants. Increases in vitamin D insufficiency and deficiency in lactating mothers may reduce vitamin D concentrations in breast milk. This study aimed to compare vitamin D and 25-hydroxyvitamin D (25OHD) concentrations in breast milk collected in 1989 and 2016–2017 and simultaneously analyze them with liquid chromatography-tandem mass spectrometry (LC-MS/MS); the association between the lifestyle of recent lactating mothers (2016–2017) and vitamin D status in human breast milk was also evaluated. Method: Lactating mothers were recruited from three regions of Japan in 1989 (n = 72) and 2016–2017 (n = 90), and milk from 3–4 months was collected in summer and winter. The samples were strictly sealed and stored at −80℃ until measurement. Breast milk vitamin D and 25OHD concentrations were analyzed by LC-MS/MS. Vitamin D intake, sun exposure, and sunscreen use of the lactating mothers in 2016–2017 were assessed. Results: Both vitamin D and 25OHD concentrations in breast milk were higher in the summer regardless of the survey year. Significantly lower vitamin D and 25OHD concentrations were observed in 2016–2017 compared with 1989 in summer, but no survey year difference was observed in winter. The stepwise multiple regression analyses identified season, daily outdoor activity, and suntan in the last 12 months as independent factors associated with vitamin D3 concentrations. Conclusion: The results suggest that low vitamin D status in recent lactating mothers may have decreased vitamin D and 25OHD concentrations in breast milk compared with the 1980s. These results are helpful for developing public health strategies to improve vitamin D status in lactating mothers and infants.

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COVID-19 Disease Severity and Death in Relation to Vitamin D Status among SARS-CoV-2-Positive UAE Residents

Nutrients ◽

10.3390/nu13051714 ◽

2021 ◽

Vol 13 (5) ◽

pp. 1714

Author(s):

Habiba AlSafar ◽

William B. Grant ◽

Rafiq Hijazi ◽

Maimunah Uddin ◽

Nawal Alkaabi ◽

...

Keyword(s):

Vitamin D ◽

United Arab Emirates ◽

Blood Levels ◽

Vitamin D Status ◽

Hospital Visit ◽

Serum Samples ◽

Hydroxyvitamin D ◽

Increased Risk ◽

Multiethnic Population ◽

25 Hydroxyvitamin D

Insufficient blood levels of the neurohormone vitamin D are associated with increased risk of COVID-19 severity and mortality. Despite the global rollout of vaccinations and promising preliminary results, the focus remains on additional preventive measures to manage COVID-19. Results conflict on vitamin D’s plausible role in preventing and treating COVID-19. We examined the relation between vitamin D status and COVID-19 severity and mortality among the multiethnic population of the United Arab Emirates. Our observational study used data for 522 participants who tested positive for SARS-CoV-2 at one of the main hospitals in Abu Dhabi and Dubai. Only 464 of those patients were included for data analysis. Demographic and clinical data were retrospectively analyzed. Serum samples immediately drawn at the first hospital visit were used to measure serum 25-hydroxyvitamin D [25(OH)D] concentrations through automated electrochemiluminescence. Levels < 12 ng/mL were significantly associated with higher risk of severe COVID-19 infection and of death. Age was the only other independent risk factor, whereas comorbidities and smoking did not contribute to the outcomes upon adjustment. Sex of patients was not an important predictor for severity or death. Our study is the first conducted in the UAE to measure 25(OH)D levels in SARS-CoV-2-positive patients and confirm the association of levels < 12 ng/mL with COVID-19 severity and mortality.

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Vitamin D Status and Seasonal Variation among Danish Children and Adults: A Descriptive Study

Nutrients ◽

10.3390/nu10111801 ◽

2018 ◽

Vol 10 (11) ◽

pp. 1801 ◽

Cited By ~ 20

Author(s):

Louise Hansen ◽

Anne Tjønneland ◽

Brian Køster ◽

Christine Brot ◽

Rikke Andersen ◽

...

Keyword(s):

Vitamin D ◽

Seasonal Variation ◽

Vitamin D Status ◽

Hydroxyvitamin D ◽

Supplement Use ◽

Wide Range ◽

Adults And Children ◽

25 Hydroxyvitamin D ◽

Vitamin D Supplement ◽

Very High

The aim of the present study was to describe vitamin D status and seasonal variation in the general Danish population. In this study, 3092 persons aged 2 to 69 years (2565 adults, 527 children) had blood drawn twice (spring and autumn) between 2012 and 2014. A sub-sample of participants had blood samples taken monthly over a year. Serum 25-hydroxyvitamin D (25(OH)D) concentrations were measured by liquid chromatography mass spectrometry, and information on supplement use was assessed from questionnaires. Seasonal variations in 25(OH)D concentrations were evaluated graphically and descriptively, and status according to age, sex, and supplement use was described. It was found that 86% of both adults and children were vitamin D-sufficient in either spring and or/autumn; however, many had a spring concentration below 50 nmol/L. A wide range of 25(OH)D concentrations were found in spring and autumn, with very low and very high values in both seasons. Among adults, women in general had higher median 25(OH)D concentrations than men. Furthermore, vitamin D supplement use was substantial and affected the median concentrations markedly, more so during spring than autumn. Seasonal variation was thus found to be substantial, and bi-seasonal measurements are vital in order to capture the sizable fluctuations in vitamin D status in this Nordic population.

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Weight and skin colour as predictors of vitamin D status: results of an epidemiological investigation using nationally representative data

Public Health Nutrition ◽

10.1017/s1368980016000173 ◽

2016 ◽

Vol 20 (10) ◽

pp. 1857-1864 ◽

Cited By ~ 5

Author(s):

Sonali Rajan ◽

Tom Weishaar ◽

Bryan Keller

Keyword(s):

Vitamin D ◽

Body Weight ◽

Skin Colour ◽

Vitamin D Status ◽

Epidemiological Investigation ◽

Dietary Recommendations ◽

Hydroxyvitamin D ◽

25 Hydroxyvitamin D ◽

Nationally Representative ◽

The Impact

AbstractObjectiveCurrent US dietary recommendations for vitamin D vary by age. Recent research suggests that body weight and skin colour are also major determinants of vitamin D status. The objective of the present epidemiological investigation was to clarify the role of age as a predictor of vitamin D status, while accounting for body weight and skin colour, among a nationally representative sample.DesignWe calculated the mean serum 25-hydroxyvitamin D levels for the US population by age and weight, as well as by weight and race/ethnicity group. Multiple regression analyses were utilized to evaluate age and weight as predictors of vitamin D status: serum 25-hydroxyvitamin D levels with age alone, age and body weight, and age, body weight and their two-way interaction were modelled for the entire sample and each age subgroup. Graphical data were developed using B-spline non-linear regression.SettingNational Health and Nutrition Examination Survey (31 934 unweighted cases).SubjectsIndividuals aged 1 year and older.ResultsThere were highly significant differences in mean vitamin D status among US residents by weight and skin colour, with those having darker skin colour or higher body weight having worse vitamin D status. Although a significant factor, the impact of age on vitamin D status was notably less than the impact of body weight.ConclusionsVitamin D status varied predominantly by body weight and skin colour. Recommendations by nutritionists for diet and supplementation needs should take this into account if vitamin D-related health disparities are to be meaningfully reduced across the USA.

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