scholarly journals Threshold for Relationship between Vitamin D and Parathyroid Hormone in Chinese Women of Childbearing Age

2021 ◽  
Vol 18 (24) ◽  
pp. 13060
Author(s):  
Yichun Hu ◽  
Siran Li ◽  
Jun Wang ◽  
Deqiang Zheng ◽  
Huidi Zhang ◽  
...  
Keyword(s):  
Vitamin D ◽  
Parathyroid Hormone ◽  
Chinese Women ◽  
Nonlinear Least Squares ◽  
Childbearing Age ◽  
Serum Samples ◽  
Nutrition Survey ◽  
Serum Pth ◽  
The Relationship ◽  
Childbearing Women

Background: The aim of this study was to assess the relationship between serum 25-hydroxyvitamin D [25(OH)D] and serum intact parathyroid hormone (PTH) in Chinese childbearing women, and to estimate the optimum threshold of 25(OH)D that maximally inhibits the PTH, which is considered to be the optimal status for vitamin D sufficiency. Methods: Serum samples were selected from the biological samples’ bank of the Chinese Chronic Diseases and Nutrition Survey (CCDNS) 2015. The serum 25(OH)D concentration was determined by liquid chromatography tandem mass spectrometry and the serum PTH was determined by electronic chemiluminescence. Simple linear and partial correlation analysis, locally weighted regression smooth scatterplot (LOESS), nonlinear least squares estimation (NLS), and segmented regression (SR) were utilized to estimate the relationship of 25(OH)D and PTH, and to determine the threshold of 25(OH)D. Results: A total of 1568 serum samples of 25(OH)D concentration and PTH concentration were analyzed. A significant inverse relationship between 25(OH)D and PTH concentration was observed below 15.25 (14.22–16.28) ng/mL, and PTH decreased slowly with the increase of 25(OH)D above 16.75 (15.43–18.06) ng/mL after adjusting by age, latitude, city type, season, corrected calcium, and phosphorus. A very short plateau of PTH was found at 15.25 ng/mL and 16.75 ng/mL in terms of 25(OH)D according to LOESS, NLS, and SR. Conclusions: The serum 25(OH)D was negatively correlated with the serum PTH. The threshold of VitD sufficiency was found in the range of 14.22–18.06 ng/mL in terms of serum 25(OH)D concentration for Chinese childbearing women aged 18–44 years old.

scholarly journals Study on the Relationship of 25-hydroxyvitamin D and Intact Parathyroid Hormone in Chinese Adults

2020 ◽  
Author(s):  
Yichun Hu ◽  
Siran Li ◽  
Zhen Liu ◽  
Lichen Yang ◽  
Xiaoguang Yang
Keyword(s):  
Vitamin D ◽  
Parathyroid Hormone ◽  
Intact Parathyroid Hormone ◽  
Chinese Adults ◽  
Serum Samples ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D ◽  
Relationship Of ◽  
The Relationship ◽  
Ipth Concentration

Abstract Background:Vitamin D plays an important role in bone health and other diseases, however, there is no consensus over the optimal serum 25-hydroxyvitamin D (25(OH)D) concentration. Many studies consider that the 25(OH)D concerntration which maximally inhibit serum intact parathyroid hormone (iPTH) might be the optimal status for vitamin D sufficiency. This study was performed to study the relationship between 25(OH)D concentration and intact parathyroid hormone (iPTH) concentration in the Chinese non-clinical population aged 18-44y. Methods: The serum samples of adults aged 18-44 years old were selected from the established serum bank of Chinese Chronic Diseases and Nutrition Survey (CCDNS, 2015-2018). The serum 25(OH)D concentration was determined by high performance liquid chromatography tandem mass spectrometer, and the iPTH was determined by electronic chemiluminescence method. The relationship of 25(OH)D and iPTH were analyzed by correlation analysis, segmented linear regression and the confidence interval was determined by bootstrap method. Results: 623 serum samples (293 male, 330 female) of 25(OH)D concentration and iPTH concentration were analyzed. Significant higher 25(OH)D concentration was found in male than female. And the samples from the southern China had higher 25(OH)D concentration than those from the northern China. Samples from autumn had higher 25(OH)D concentration than those from spring and winter. The inversely relationship between 25(OH)D concentration and iPTH concentration was observed in both male and female. The concentration of 25(OH)D was 19.2 (10.1-27.2) ng/mL (P=0.02) when iPTH entered the plateau in women and no plateau for iPTH was found in men. Conclusions: The relationship between 25(OH)D and iPTH differs by sex among Chinese adults aged 18-44y. Further study is needed to evaluate the sex-specific ranges of optimal vitamin D. Trial registration: Not applicable. Keywords: 25-hydroxyvitamin D; parathyroid hormone; plateau; Chinese adults

scholarly journals Relationship Between Parathyroid Hormone Levels and Abdominal Aortic Calcification in Incident Hemodialysis Patients Not Treated with Calcium or Vitamin D

2021 ◽  
Author(s):  
Jin He ◽  
Shubei Chen ◽  
Kewen Mao ◽  
Xiaoyan Sun ◽  
Rongjian Nie
Keyword(s):  
Vitamin D ◽  
Parathyroid Hormone ◽  
Cardiovascular Events ◽  
Hemodialysis Patients ◽  
Aortic Calcification ◽  
Abdominal Aortic Calcification ◽  
Abdominal Aortic ◽  
High Incidence ◽  
Serum Pth ◽  
The Relationship

Abstract Vascular calcification (VC) and secondary hyperparathyroidism (SHPT) are important causes of high incidence of cardiovascular events in chronic kidney disease (CKD) patients. The relationship between parathyroid hormone (PTH) and VC is very complex. Different studies have inconsistent reports on the effect of PTH on VC. The present study investigated the correlation between PTH levels and abdominal aortic calcification (AAC) in incident hemodialysis patients who did not receive calcium, calcium-containing phosphorus binders, calcitriol or vitamin D analogs. Our data confirm that serum PTH levels is significantly negatively correlated with AAC within a certain concentration range in incident hemodialysis patients who not treated with calcium or vitamin D.

scholarly journals Study on the Relationship of 25-hydroxyvitamin D and Intact Parathyroid Hormone in Chinese Young Adults

2020 ◽  
Author(s):  
Yichun Hu ◽  
Siran Li ◽  
Zhen Liu ◽  
Lichen Yang ◽  
Xiaoguang Yang
Keyword(s):  
Vitamin D ◽  
Young Adults ◽  
Parathyroid Hormone ◽  
Intact Parathyroid Hormone ◽  
Serum Samples ◽  
Hydroxyvitamin D ◽  
Chinese Young Adults ◽  
Relationship Of ◽  
The Relationship ◽  
Ipth Concentration

Abstract Background : Vitamin D plays an important role in bone health and other diseases, however, there is no consensus over the optimal serum 25-hydroxyvitamin D (25(OH)D) concentration. Many studies defined a level of serum 25(OH)D at which serum intact parathyroid hormone (iPTH) levels decreased and reached a plateau might be the optimal status for vitamin D sufficiency. This study was performed to study the relationship between 25(OH)D concentration and intact parathyroid hormone (iPTH) concentration in the Chinese non-clinical young population aged 18-44y. Methods : The serum samples of young adults aged 18-44 years old were selected from the established serum bank of Chinese Chronic Diseases and Nutrition Survey (CCDNS, 2015-2018). The serum 25(OH)D concentration was determined by high performance liquid chromatography tandem mass spectrometer, and the iPTH was determined by electronic chemiluminescence method. The relationship of 25(OH)D and iPTH were analyzed by partial correlation analysis, and the threshold of 25(OH)D was analyzed by locally weighted scatter plot smoothing method after adjusting the iPTH by age, season of blood draw, BMI, waist, sex and latitude. Results : 623 serum samples (293 male, 330 female) of 25(OH)D concentration and iPTH concentration were analyzed. Significant higher 25(OH)D concentration was found in male than female. And the samples from the southern China had higher 25(OH)D concentration than those from the northern China. Samples from autumn had higher 25(OH)D concentration than those from spring and winter. The inversely relationship between 25(OH)D concentration and iPTH concentration was observed when the 25(OH)D was below 17.6 ng/mL for both sexes. The threshold for male was 16.2 ng/mL and it was 25.6 ng/mL for female. Conclusions : The threshold and the relationship between 25(OH)D and iPTH differs by sex among Chinese young adults aged 18-44y. Further study is needed to evaluate the sex-specific ranges of optimal vitamin D. Trial registration : Not applicable.

Aging alters calcium regulation of serum concentration of parathyroid hormone in healthy men

1997 ◽  
Vol 272 (1) ◽  
pp. E139-E146 ◽  
Author(s):  
A. A. Portale ◽  
E. T. Lonergan ◽  
D. M. Tanney ◽  
B. P. Halloran
Keyword(s):  
Parathyroid Hormone ◽  
Young Men ◽  
The Elderly ◽  
Ionized Calcium ◽  
Elderly Men ◽  
Elderly Age ◽  
Healthy Men ◽  
Age Related ◽  
Serum Pth ◽  
The Relationship

We examined the effect of aging on the relationship between the concentrations of blood ionized calcium and of serum parathyroid hormone (PTH) in 22 healthy men [9 elderly (age 74 +/- 2 yr) and 13 young (age 39 +/- 1 yr)] in whom the glomerular filtration rate was > 70 ml/min. Throughout a 24-h period, serum concentrations of PTH in the elderly men were twice those in the young men, whereas blood ionized calcium did not differ between the two groups. With intravenous infusion of calcium gluconate, the minimum PTH concentration was two- to threefold higher in the elderly men. With infusion of NaEDTA. the maximum PTH concentration was 20% higher in the elderly men. The calcium set point for PTH release was higher in the elderly than in the young men (4.71 +/- 0.04 vs. 4.54 +/- 0.03 mg/dl, respectively, P < 0.005). In these healthy men, the age-related increase in serum PTH could not be attributed to a sustained decrease in concentration of either blood ionized calcium or 1,25-hydroxyvitamin D. These findings suggest that, with aging, the relationship between calcium and PTH is altered such that at any given level of calcium, the concentration of PTH is higher.

scholarly journals Vitamin D Serum Levels in the UK Population, including a Mathematical Approach to Evaluate the Impact of Vitamin D Fortified Ready-to-Eat Breakfast Cereals: Application of the NDNS Database

Nutrients ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1868
Author(s):  
Wim Calame ◽  
Laura Street ◽  
Toine Hulshof
Keyword(s):  
Vitamin D ◽  
Daily Intake ◽  
Serum Levels ◽  
Vitamin D Status ◽  
Nutrition Survey ◽  
Breakfast Cereals ◽  
Vitamin D Intake ◽  
The Uk ◽  
The Impact ◽  
The Relationship

Vitamin D status is relatively poor in the general population, potentially leading to various conditions. The present study evaluates the relationship between vitamin D status and intake in the UK population and the impact of vitamin D fortified ready-to-eat cereals (RTEC) on this status via data from the National Diet and Nutrition Survey (NDNS: 2008–2012). Four cohorts were addressed: ages 4–10 (n = 803), ages 11–18 (n = 884), ages 19–64 (n = 1655) and ages 65 and higher (n = 428). The impact of fortification by 4.2 μg vitamin D per 100 g of RTEC on vitamin D intake and status was mathematically modelled. Average vitamin D daily intake was age-dependent, ranging from ~2.6 (age range 4–18 years) to ~5.0 μg (older than 64 years). Average 25(OH)D concentration ranged from 43 to 51 nmol/L, the highest in children. The relationship between vitamin D intake and status followed an asymptotic curve with a predicted plateau concentration ranging from 52 in children to 83 nmol/L in elderly. The fortification model showed that serum concentrations increased with ~1.0 in children to ~6.5 nmol/L in the elderly. This study revealed that vitamin D intake in the UK population is low with 25(OH)D concentrations being suboptimal for general health. Fortification of breakfast cereals can contribute to improve overall vitamin D status.

Seasonal levels of serum parathyroid hormone, calcitonin and alkaline phosphatase in relation to antler cycles in white-tailed deer

1984 ◽  
Vol 106 (2) ◽  
pp. 234-240 ◽  
Author(s):  
Chun Chin Chao ◽  
Robert D. Brown ◽  
Leonard J. Deftos
Keyword(s):  
Alkaline Phosphatase ◽  
Body Weight ◽  
Parathyroid Hormone ◽  
Feed Intake ◽  
Feed Consumption ◽  
Late Winter ◽  
Serum Parathyroid Hormone ◽  
Serum Samples ◽  
Antler Growth ◽  
Serum Pth

Abstract. Seasonal levels of serum parathyroid hormone (PTH), calcitonin (CT), and alkaline phosphatase (AP) were studied in relation to antler growth cycles in 8 male (2.5–6 years old) white-tailed deer. Feed consumption was recorded weekly, whereas body weight was recorded biweekly. Antler length was measured from the pedicle to the tip after velvet growth was initiated. Serum samples were obtained biweekly while animals were tranquilized with xylazine hydrochloride. Serum Ca was significantly (P < 0.05) elevated during the summer. Serum P was significantly (P < 0.05) elevated only during early fall. There was an increase in serum PTH during velvet initiation in April–May, but not thereafter. CT increased during the rapid antler growth period. Serum PTH levels were significantly (P < 0.05) elevated (0.628 vs 0.884 ng/ml) during post-velvet shedding and decreased (0.602 vs 0.346 ng/ml, P < 0.05) during postantler casting. Serum AP activity was highest during rapid velvet antler growth. Feed intake was lowest in early winter, but a compensatory increase was found in late winter. Feed intake peaked in May, then gradually decreased. Body weight was maximum in November and minimum in March. It is concluded that increased PTH during velvet initiation is responsible for Ca absorption and/or mobilization. Increasing PTH levels are related to final mineralization of antlers post-velvet shedding. Higher levels of serum Ca in June–July inhibit continued increase in PTH. Increased CT during rapid antler growth may have prevented excessive bone resorption.

scholarly journals Prevalence and Risk Factors for Anemia in Non-pregnant Childbearing Women from the Chinese Fifth National Health and Nutrition Survey

2019 ◽  
Vol 16 (7) ◽  
pp. 1290
Author(s):  
Yichun Hu ◽  
Min Li ◽  
Jinghuan Wu ◽  
Rui Wang ◽  
Deqian Mao ◽  
...  
Keyword(s):  
Risk Factors ◽  
Hemoglobin Concentration ◽  
Middle School Education ◽  
Public Health Issue ◽  
Women Of Childbearing Age ◽  
Childbearing Age ◽  
Nutrition Survey ◽  
Health And Nutrition ◽  
Childbearing Women ◽  
Prevalence Of Anemia

Anemia is a public health issue for developing countries, especially for women of childbearing age. The aim of this study was to assess the anemia status and analyze the risk factors for anemia in Chinese childbearing women aged 18–49 years. Hemoglobin concentration was measured by the HiCN method in the Fifth Chinese National Nutrition and Health Survey (CNNHS) in 2010–2012. Age, region type, ethnicity, bodyweight, height, education, season and smoke habit were recorded in unified questionnaires. Latitude was divided by China’s Qinling Mountains and Huaihe River. Childbearing women (28,289) from the CNNHS 2010–2012 were included in this study. The median hemoglobin concentration was 136.2(126.6–145.0) g/L, and it was significantly higher than in CNNHS 2002 (132.5 (122.3–141.6) g/L). The prevalence of anemia was 15.0%, and it was significantly lower than 10 years ago. The logistic regression analysis showed anemia in Chinese childbearing women was specifically related to 30–39 age group (P = 0.004), in spring (P < 0.0001) or in winter (P = 0.006), small and medium-sized cities (P = 0.044) and middle school education level (P = 0.027). The results showed that anemia status among childbearing women was greatly improved over 10 years since 2002, but it was still more severe than the rest of the populations. The nutrition propaganda and education is recommended for childbearing women to help them to improve the nutritional status on their own.

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