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1.
Nutrients ; 14(14)2022 Jul 10.
Artículo en Inglés | MEDLINE | ID: mdl-35889792

RESUMEN

Vitamin D deficiency is considered a major public health problem worldwide and has been reported as having an association with depression. However, studies on the association between vitamin D deficiency and depressive symptoms in secondary amenorrhea (SA) patients are still scarce. This study examined the relationship between serum 25-hydroxyvitamin D (25(OH)D) levels and depressive symptoms among Korean women with SA. In this cross-sectional observational study, 78 patients with SA were initially recruited. Clinical and biochemical parameters, including serum 25(OH)D level, were measured. Data from 63 SA patients who met the study inclusion criteria and completed psychiatric assessments were finally analyzed. We analyzed their association with depression using a hierarchical regression model. The average serum 25(OH)D level was 34.40 ± 24.02 ng/mL, and 41.3% of the women with SA were vitamin D-deficient (<20 ng/mL). The total score of the Korean version of the Hamilton Depression Rating Scale (K-HDRS) was negatively related to serum 25(OH)D levels, free testosterone, and serum anti-Müllerian hormone (AMH) after adjusting for age and BMI (r = -0.450, p < 0.001; r = -0.258, p = 0.045; and r = -0.339, p = 0.006, respectively). Serum 25(OH)D levels and AMH levels were the most powerful predictors of depressive severity when using the K-HDRS in SA patients (ß = -0.39, p < 0.005; ß = -0.42, p < 0.005, respectively). This study showed that low serum 25(OH)D levels were associated with the severity of depressive symptoms in SA patients. This observation suggests that the evaluation of vitamin D deficiency for the risk of depression may be necessary in patients with SA.


Asunto(s)
Amenorrea , Depresión , Deficiencia de Vitamina D , Amenorrea/epidemiología , Hormona Antimülleriana , Estudios Transversales , Depresión/epidemiología , Femenino , Humanos , República de Corea/epidemiología , Vitamina D/análogos & derivados , Vitamina D/sangre , Deficiencia de Vitamina D/complicaciones
2.
BMC Endocr Disord ; 22(1): 169, 2022 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-35778716

RESUMEN

AIMS: This study aimed to investigate the association between circulating levels of vitamin D binding protein (VDBP) and its genotypes and diabetic retinopathy risk. METHODS: This case-control study recruited 154 patients with type 2 diabetes mellitus; 62 with diabetic retinopathy (DR) and 92 without DR and diabetic nephropathy (DN). Circulating levels of 25-hydroxyvitamin D3 and VDBP levels were measured in the patients. The genotype and phenotype of VDBP were evaluated based on two common VDBP variations; rs7041 and rs4588. RESULTS: Serum levels of VDBP were significantly lower in patients with DR than in patients without DR and/or DN (Ln-VDBP (µg/ml): 6.14 ± 0.92 vs. 6.73 ± 1.45, p = 0.001) even after adjustment for age, sex, body mass index, disease duration, estimated glomerular filtration rate (eGFR), HbA1C, insulin therapy profile, and serum levels of 25(OH)D. The distribution of VDBP phenotypes and genotypes in the two studied groups were nearly the same, and the distribution was similar to that of the general population. CONCLUSIONS: In this study, we found the association between lower circulating levels of VDBP and risk of DR. However, the precise mechanism linking these two remains unknown. Further and more in-depth research is needed to find out the underlying causes of the relationship.


Asunto(s)
Diabetes Mellitus Tipo 2 , Retinopatía Diabética , Proteína de Unión a Vitamina D , Vitamina D , Disponibilidad Biológica , Estudios de Casos y Controles , Diabetes Mellitus Tipo 2/complicaciones , Nefropatías Diabéticas , Retinopatía Diabética/metabolismo , Humanos , Vitamina D/sangre , Proteína de Unión a Vitamina D/sangre , Proteína de Unión a Vitamina D/genética
3.
Arch Osteoporos ; 17(1): 100, 2022 07 27.
Artículo en Inglés | MEDLINE | ID: mdl-35895238

RESUMEN

"Health-based threshold value" is used to define the optimal cutoff of vitamin D. This approach is based on the hypothesis of a secondary hyperparathyroidism associated with hypovitaminosis D. We define the optimal values in a North Algerian population. The optimal value is 25.0 ng/ml in men and 30.0 ng/ml in women. PURPOSE/INTRODUCTION: There is no consensus defining the vitamin D optimal values. The aim of this study is to establish vitamin D optimal values in the Northern Algerian population, based on its skeletal effects as represented by the inverse relationship between 25-hydroxy vitamin D (25(OH) D) and parathyroid hormone (PTH). METHODS: 451 healthy volunteers of both genders, aged 19 to 79 years, were enrolled in a cross-sectional study conducted at the medical analysis laboratory of the University Hospital of Blida, Algeria. 25(OH) D was assessed by a sequential competitive immuno-fluoroassay technique. Determination of vitamin D optimal values was performed based on the kinetic relationship between 25(OH) D and PTH, as explored by inverse nonlinear regression on a spline plots curve. The optimal value represents the 25(OH) D level at which PTH ceases to increase and reaches a virtual plateau. RESULTS: In men and women, respectively, the 25 (OH) D thresholds are estimated at 25.0 ng/ml and 30 ng/ml, above this value, PTH stabilizes in a virtual plateau, estimated at 22.3 pg/ml and 26.8 pg/ml. In warm and cold seasons, respectively, the 25 (OH) D cut-offs are estimated at 30.0 ng/ml and 25.0 ng/ml, from these values, the PTH stabilizes in a virtual plateau, estimated at 21.5 pg/ml and 27.7 pg/ml. CONCLUSION: In this study, the optimal values of 25(OH) D were defined for the first time in a North Algerian adult population. The optimal value is 25.0 ng/ml in men and 30.0 ng/ml in women.


Asunto(s)
Hormona Paratiroidea , Deficiencia de Vitamina D , Vitamina D , Adulto , Anciano , Argelia , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Hormona Paratiroidea/sangre , Estaciones del Año , Vitamina D/sangre , Deficiencia de Vitamina D/epidemiología , Vitaminas , Adulto Joven
4.
Eur Rev Med Pharmacol Sci ; 26(10): 3483-3486, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35647828

RESUMEN

OBJECTIVE: Endocrine Society classified patients with serum 25-hydroxyvitamin D [25(OH)D] levels below 20 ng/ml as deficiency, 20-30 ng/ml as insufficiency, and >30 ng/ml as replete. This study was planned to investigate the relationship between serum vitamin D level and homeobox 10 mRNA expression in women with polycystic ovary syndrome (PCOS). PATIENTS AND METHODS: Thirty women with PCOS who failed the first IVF/ICSI attempt and were decided to have endometrial injury before second attempt were included in the study. Before the endometrial injury, the serum vitamin D levels of the women were measured, and they were divided into three equal groups as proposed by the Endocrine Society. Group 1 consisted of vitamin D deficient women (<20 ng/mL), Group 2 consisted of vitamin D insufficient women (20-30 ng/mL), and Group 3 consisted of vitamin D replete women (>30 ng/mL). Women in each group were injured with a Pipelle cannula during mid-luteal phase. Endometrial samples collected during injury were analyzed for HOXA10 mRNA expression by RT-PCR and correlated with serum vitamin D level. RESULTS: When analyzing the results according to different vitamin D thresholds, as proposed by the Endocrine Society, HOXA10 mRNA expression was comparable between vitamin D deficient and vitamin D insufficient women. The HOXA10 mRNA expression of vitamin D replete women(Group 3) was found to be higher than both vitamin D deficient (Group 1) and vitamin D insufficient women (Group 2). HOXA10 mRNA expression of the women in Group 3 was 3.3-fold higher than Group 1 and 2.6-fold higher than Group 2. HOXA10 mRNA expression was correlated to the levels of vitamin D in the Group 3 (r=0.655, p=0.02). There was no significant correlation between serum vitamin D levels and endometrial HOXA10 mRNA expression of women in both Group 1 (r=0.343, p=0.06) and Group 2 (r=0.456, p=0.08). CONCLUSIONS: Endometrium of women with PCOS with sufficient serum vitamin D levels express significantly higher HOXA10 mRNA than patients with low serum vitamin D levels.


Asunto(s)
Proteínas Homeobox A10 , Síndrome del Ovario Poliquístico , Deficiencia de Vitamina D , Vitamina D , Calcifediol , Endometrio , Femenino , Proteínas Homeobox A10/genética , Humanos , Síndrome del Ovario Poliquístico/genética , Vitamina D/análogos & derivados , Vitamina D/sangre
5.
Eur Rev Med Pharmacol Sci ; 26(10): 3493-3505, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35647830

RESUMEN

OBJECTIVE: Vitamin D deficiency is a significant problem that affects the population living in most countries. This issue is independent by place of residence, sex, age or skin color. It is mainly influenced by the environment we live in and by an unhealthy lifestyle, including bad eating habits. The aim of this study was to evaluate lipid profile, glucose levels, and vitamin D levels, considering sociodemographic variables, smoking and alcohol consumption in perimenopausal women. Depressive mood was also assessed considering sociodemographic variables and vitamin D levels. PATIENTS AND METHODS: The study was conducted on a group of 191 women and performed in two stages. The first of them was carried out using a diagnostic survey with the use of a technique questionnaire. The applied research instruments were the author's questionnaire (concerning sociodemographic and selected medical data), and the Beck Depression Inventory. The second stage of the study involved the collection of peripheral blood from each respondent, in order to determine lipid profile, glycemia and serum vitamin D levels. RESULTS: The age of the female respondents ranged from 45 to 65 years, mean age was 53.1 ± 5.37 years, median 53 years. Vitamin D levels were below normal in 78%; 77% had elevated total cholesterol levels; 91.6% of the respondents had high density lipoprotein (HDL) cholesterol levels within the normal range; 64.4% was characterized by too high (low-density lipoprotein) LDL cholesterol, and 84.8% of the women showed normal triglyceride levels. Among the respondents, 91.1% had normal glycemic levels. Analysis of the collected data showed a weak negative correlation between serum vitamin D levels and the levels of total cholesterol (rho=-0.14; p=0.05), LDL cholesterol (rho=-0.16; p=0.026), and triglycerides (rho=-0.22; p=0.002). Only in the case of HDL cholesterol (p=0.067), there was no statistically significant correlation. There were also no statistically significant correlations between serum vitamin D levels and glycemia or severity of depression. CONCLUSIONS: 1. The majority of the women did not manifest depressive disorders. Of all factors analyzed, only education was associated with the severity of depressiveness. 2. Smoking adversely affected serum vitamin D levels in the studied women. 3. The cessation of menstruation affected carbohydrate metabolism and vitamin D levels. Blood glucose levels increased with the age of the studied women. 4. Relationships were found between the levels of vitamin D and the levels of total cholesterol, LDL cholesterol, and triglycerides. Therefore, it is important to maintain normal vitamin D levels.


Asunto(s)
Depresión , Perimenopausia , Vitamina D , Anciano , Glucemia/metabolismo , LDL-Colesterol , Depresión/epidemiología , Femenino , Humanos , Lípidos/sangre , Persona de Mediana Edad , Triglicéridos , Vitamina D/sangre , Vitaminas
6.
Iran J Immunol ; 19(2): 3, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-35767888

RESUMEN

BACKGROUND: Vitamin D has anti-inflammatory efficacy against ulcerative colitis (UC), however, the mechanism is yet little understood. OBJECTIVE: To investigate the immunomodulatory effects of vitamin D against the UC, and to explore the potential downstream mechanisms. MATERIALS AND METHODS: Serum vitamin D, Interferon-γ (IFN-γ) and Interleukin (IL)-17 levels of the patients with UC were quantified using enzyme-linked immunosorbent assay (ELISA). Long non-coding RNAs (lncRNAs) levels were determined by using quantitative reverse-transcription polymerase chain reaction (qRT-PCR). Peripheral blood mononuclear cells (PBMCs) were collected from healthy control subjects, stimulated with CD4+ T lymphocytes or helper T cells 17(Th17) differentiation conditions, and then exposed to calcitriol (vitamin D active form) or certain lentiviral treatment, followed by subsequent molecular level testing. For in vivo assay, mice were given 3% dextran sulfate sodium (DSS) to induce colitis. RESULTS: Compared with the control group, vitamin D levels in the UCs were statistically lower, and there was a negative correlation between IL-17 and vitamin D in the UCs. The lncRNA OIP5-AS1 could decrease under calcitriol treatment in both CD4+ T cells and Th17 differentiation. The lncRNA OIP5-AS1 was a microRNA (miR)-26a-5p sponge and therefore modulated the Th17 cells and IL-6 expression. The lncRNA OIP5-AS1/miR-26a-5p/IL-6 axis mediated the regulation of calcitriol-induced Th17 differentiation. Calcitriol had therapeutic effects on the UC mouse models by regulating the lncRNA OIP5-AS1 related pathway. CONCLUSION: Vitamin D might have anti-inflammatory potential in the treatment of the UC.


Asunto(s)
Colitis Ulcerosa , Interleucina-6 , MicroARNs , ARN Largo no Codificante , Células Th17 , Vitamina D , Animales , Calcitriol/farmacología , Colitis Ulcerosa/sangre , Colitis Ulcerosa/tratamiento farmacológico , Colitis Ulcerosa/genética , Colitis Ulcerosa/patología , Humanos , Interleucina-6/sangre , Leucocitos Mononucleares/metabolismo , Ratones , MicroARNs/sangre , MicroARNs/genética , MicroARNs/metabolismo , ARN Largo no Codificante/sangre , ARN Largo no Codificante/genética , ARN Largo no Codificante/metabolismo , Transducción de Señal , Células Th17/efectos de los fármacos , Células Th17/metabolismo , Vitamina D/sangre
7.
BMC Pregnancy Childbirth ; 22(1): 400, 2022 May 11.
Artículo en Inglés | MEDLINE | ID: mdl-35545756

RESUMEN

BACKGROUND: The association between serum 25-hydroxy vitamin D (25(OH)D) status and gestational diabetes mellitus (GDM) gained attention in recent years, however the conclusion is still controversial due to many interfering factors, such as region of living, environment, lifestyle, and food supplements. Other metabolites (laboratory parameters) are also important in reflecting gestational states. This study aimed to investigate the association of serum 25(OH)D status in early pregnancy with GDM and other laboratory parameters in pregnant women. METHODS: A total of 1516 pregnant women whose blood glucose were normal before pregnancy in the city of Foshan in Guangdong, China were enrolled in this study. GDM was diagnosed between 24 to 28 weeks of pregnancy following the guidelines from the American Diabetes Association. Maternal serum 25(OH)D and other laboratory parameters-including hematology, coagulation, chemistry, and bone density-were measured utilizing various analytical methods in clinical laboratory at gestational weeks 11 to 14. RESULTS: The average 25(OH)D concentration was 59.1 ± 12.6 nmol/L. None of the study subjects had 25(OH)D < 25 nmol/L; 434 (28.6%) women had 25(OH)D deficiency (< 50 nmol/L), 882 women (58.2%) had 25(OH)D insufficiency (50-74 mmol/L) and 200 women (13.2%) had 25(OH)D sufficiency (≥ 75 nmol/L). There were 264 (17.4%) women diagnosed with GDM. There was not, however, an association between serum 25(OH)D in early pregnancy and GDM. Interestingly, women with more parity and high serum alkaline phosphatase levels had higher serum 25(OH)D levels. There was a possible positive association between serum 25(OH)D and pre-albumin, and a possible negative association between serum 25(OH)D, creatinine, and thrombin time. This study did not find an association between serum 25(OH)D and bone density. CONCLUSIONS: There were no associations between maternal serum 25(OH)D concentration in early pregnancy and the risk of GDM or bone density. There were, however, correlations between serum 25(OH)D and parity, seasoning at sampling, serum alkaline phosphatase, creatinine, pre-albumin, and coagulation factor thrombin time, which need further study to explain their pathophysiology and clinical significance.


Asunto(s)
Diabetes Gestacional , Deficiencia de Vitamina D , Vitamina D , Albúminas , Fosfatasa Alcalina , Creatinina , Diabetes Gestacional/diagnóstico , Diabetes Gestacional/epidemiología , Femenino , Humanos , Embarazo , Mujeres Embarazadas , Factores de Riesgo , Vitamina D/sangre , Deficiencia de Vitamina D/epidemiología , Vitaminas
8.
Nutrients ; 14(10)2022 May 20.
Artículo en Inglés | MEDLINE | ID: mdl-35631274

RESUMEN

Obesity already causes non-communicable diseases during childhood, but the mechanisms of disease development are insufficiently understood. Myokines such as myostatin and irisin are muscle-derived factors possibly involved in obesity-associated diseases. This explorative study aims to investigate whether myostatin and irisin are associated with metabolic parameters, including the vitamin D status in pediatric patients with severe obesity. Clinical, anthropometric and laboratory data from 108 patients with severe obesity (>97th percentile) aged between 9 and 19 years were assessed. Myostatin, its antagonist follistatin, and irisin, were measured from plasma by ELISA. Myostatin concentrations, particularly in males, positively correlated with age and pubertal stage, as well as metabolic parameters such as insulin resistance. Irisin concentrations correlated positively with HDL and negatively with LDL cholesterol values. For follistatin, the associations with age and pubertal stage were inverse. Strikingly, a negative correlation of myostatin with serum vitamin D levels was observed that remained significant after adjusting for age and pubertal stage. In conclusion, there is an independent association of low vitamin D and elevated myostatin levels. Further research may focus on investigating means to prevent increased myostatin levels in interventional studies, which might open several venues to putative options to treat and prevent obesity-associated diseases.


Asunto(s)
Miostatina , Obesidad Mórbida , Obesidad Pediátrica , Vitamina D , Adolescente , Niño , Fibronectinas , Folistatina , Humanos , Masculino , Miostatina/sangre , Vitamina D/sangre , Adulto Joven
9.
BMJ Open ; 12(4): e058164, 2022 04 13.
Artículo en Inglés | MEDLINE | ID: mdl-35418433

RESUMEN

OBJECTIVE: To assess the association of serum vitamin D (VD) levels and Helicobacter pylori (H. pylori) cytotoxic-associated gene A (CagA) seropositivity, and further explore potential effect modifiers in this association. DESIGN: Cross-sectional study. SETTING: Data from phase I of the National Health and Nutrition Examination Survey (NHANES III, 1988-1991) led by the Center for Disease Control and Prevention. PARTICIPANTS: A total of 3512 US adults (≥20 years) with both serum VD levels and H. pylori CagA antibody data from NHANES III were included in the analysis. METHODS: VD deficiency was defined as serum 25(OH)D concentrations<20 ng/mL. Logistic regression models were used to assess the association of serum VD levels and H. pylori CagA seropositivity (VD-Hp CagA+), and stratification analyses were used to explore potential effect modifiers. RESULTS: There was no significant association of VD-Hp CagA+ in the general population. But serum 25(OH)D concentrations were associated with H. pylori CagA+ in non-Hispanic whites (adjusted OR=1.02, 95% CI: 1.00 to 1.03), other races/ethnicities (adjusted OR=1.08, 95% CI: 1.01 to 1.06), populations born in other countries (adjusted OR=1.09, 95% CI: 1.04 to 1.15) or occasional drinkers (adjusted OR=0.93, 95% CI: 0.88 to 0.99). VD deficiency was associated with H. pylori CagA+ in non-Hispanic whites (adjusted OR=0.69, 95% CI: 0.53 to 0.92), populations born in other countries (adjusted OR=0.47, 95% CI: 0.25 to 0.89), non-drinkers (adjusted OR=0.80, 95% CI: 0.65 to 0.99), occasional drinkers (adjusted OR=2.53, 95% CI: 1.06 to 6.05), population with first quartile level of serum ferritin (adjusted OR=0.70, 95% CI: 0.51 to 0.96) or fourth quartile level of serum folate (adjusted OR=0.63, 95% CI: 0.46 to 0.87). CONCLUSIONS: Racial/ethnic differences and different serum ferritin or serum folate levels may be effect modifiers for the association of VD-Hp CagA+.


Asunto(s)
Antígenos Bacterianos , Proteínas Bacterianas , Infecciones por Helicobacter , Vitamina D , Adulto , Anticuerpos Antibacterianos , Antígenos Bacterianos/sangre , Proteínas Bacterianas/sangre , Estudios Transversales , Ferritinas , Ácido Fólico , Infecciones por Helicobacter/complicaciones , Helicobacter pylori , Humanos , Encuestas Nutricionales , Vitamina D/sangre
10.
Pediatr Neonatol ; 63(4): 394-401, 2022 07.
Artículo en Inglés | MEDLINE | ID: mdl-35469764

RESUMEN

BACKGROUND: From the very beginning of life, biological events in the intrauterine environment influence the developing child, its growth, maturation and adaptation. The aim of this study was to assess the impact of maternal vitamin D and adiponectin status on offspring growth, general and bone health. METHODS: 162 healthy pregnant women were included in the study, with their vitaminD and adiponectin levels measured in the 32 nd week of pregnancy. Body weight and bone mineral density measurements of their offspring were performed at birth and at the age of three, six, nine and twelve months. Information on children's infectious, allergic and chronic disease was collected from their medical records. RESULTS: Vitamin D insufficiency/deficiency was present in 44% of pregnant women. There was no significant association between maternal vitamin D during pregnancy and offspring body weight at birth or later, as well as between maternal vitamin D and newborn bone mineral density. Additionally, there was no significant association between maternal vitamin D and infectious, allergic or other chronic diseases in offspring. A negative correlation between maternal adiponectin and offspring's body weight at birth was observed (r = - 0.37, p = 0.002), while association with bone mineral density in newborns was not significant. CONCLUSION: Despite the significant prevalence of vitamin D insufficiency among pregnant women, it did not influence growth or health of their offspring in this study. Maternal adiponectin levels showed an inverse relationship with birth weight of the infants, which may highlight the important link between maternal health and the offspring's growth.


Asunto(s)
Adiponectina , Fenómenos Fisiologicos Nutricionales Maternos , Deficiencia de Vitamina D , Vitamina D , Adiponectina/sangre , Peso al Nacer , Femenino , Humanos , Recién Nacido , Embarazo , Vitamina D/sangre , Deficiencia de Vitamina D/complicaciones , Deficiencia de Vitamina D/epidemiología , Vitaminas
11.
J Korean Med Sci ; 37(14): e110, 2022 Apr 11.
Artículo en Inglés | MEDLINE | ID: mdl-35411730

RESUMEN

BACKGROUND: The role of vitamin D deficiency and vitamin D receptor (VDR) gene polymorphisms has been established in many autoimmune diseases, including vitiligo, but the result is still controversial. OBJECTIVES: The aim of this study was to investigate the serum vitamin D levels in vitiligo patients and to compare the association of VDR gene polymorphisms in vitiligo patients and healthy controls. METHODS: We collected the data of age, sex, serum 25-hydroxy vitamin D (25[OH]D) level, thyroid autoantibodies, disease duration, types of vitiligo, family history and the affected body surface area of vitiligo from 172 patients. And we analyzed the VDR gene polymorphisms in 130 vitiligo and 453 age-sex-matched control subjects. RESULTS: The mean serum level of 25(OH)D in 172 vitiligo patients was 18.75 ± 0.60 ng/mL, which had no significant difference with a mean serum value of 25(OH)D in the Korean population. However, there were significant differences according to the duration of the disease and family history. Also, there were no significant differences in the genotypic and allelic distributions of 37 examined SNPs of VDR gene between vitiligo patients and healthy controls. CONCLUSION: Serum level of 25(OH)D in vitiligo patients was not significantly different from the mean serum value of the Korean population. Also, there were no significant differences in the genotypic distributions of VDR gene between vitiligo patients and healthy controls.


Asunto(s)
Receptores de Calcitriol , Vitamina D , Vitíligo , Calcifediol , Estudios de Casos y Controles , Genotipo , Humanos , Polimorfismo de Nucleótido Simple , Receptores de Calcitriol/genética , Vitamina D/análogos & derivados , Vitamina D/sangre , Vitíligo/genética
12.
J Steroid Biochem Mol Biol ; 220: 106101, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-35351538

RESUMEN

In vitro studies indicate that 25-hydroxyvitamin D3 (25(OH)D3) and 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) inhibits the synthesis of parathyroid hormone (PTH). The degree of PTH inhibition in humans by circulating 25(OH)D and 1,25(OH)2D may be different. Moreover, age and sex as well as confounding factors like calcium and phosphate may likewise affect the relationship between vitamin D and PTH in humans. However, this was not done so far in adequately powered studies. We investigated the relationship between 25(OH)D as well as 1,25(OH)2D and intact parathyroid hormone (iPTH) in 23,134 outpatients (age mean: 59.81 years) from the Berlin-Brandenburg area of Germany with normal serum creatinine considering confounding factors like age, sex, calcium and phosphate. 25(OH)D and iPTH were inversely correlated (r = -0.17, p < 0.0001). The inverse linear correlation was observed over the entire spectrum of 25(OH)D concentrations - from low 25(OH)D concentrations to very high 25(OH)D concentrations. Multiple linear regression analysis revealed that this correlation was independent of age, sex, creatinine, calcium and phosphate (unstandardized coefficients B: -0.16, p < 0.0001). However, 1,25(OH)2D was only positively associated with iPTH in women (r = 0.05, p = 0.033) and in the subgroup of patients with lower 25(OH)D (25(OH)D< 40 ng/ml) (r = 0.09, p < 0.0001), which was also presented in multiple linear regression analysis (unstandardized coefficients B: 0.20, p = 0.001). Circulating 1,25(OH)2D does not contribute substantially to the regulation of PTH in middle aged and vitamin D sufficient outpatients from the Berlin-Brandenburg area of Germany with normal kidney function. Presumably, serum 25(OH)D that is converted to 1,25(OH)2D after uptake in the parathyroid chief cells plays the critical role.


Asunto(s)
Calcio , Hormona Paratiroidea , Vitamina D , Calcifediol , Calcio en la Dieta , Femenino , Alemania , Humanos , Masculino , Persona de Mediana Edad , Pacientes Ambulatorios , Hormona Paratiroidea/sangre , Fosfatos , Vitamina D/sangre , Vitaminas
13.
J Endocrinol Invest ; 45(6): 1255-1263, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-35237949

RESUMEN

PURPOSE: Girls affected with Turner syndrome (TS) present with low bone mineral density (BMD) and osteopenia/osteoporosis. Thus, they have an increased risk to develop fractures compared to normal population. The aim of this study was to deepen the pathophysiology of skeletal fragility in TS subjects by evaluating the serum levels of Dickkopf-1 (DKK-1) and sclerostin, main regulators of bone mass, as well as the percentage of circulating osteoblast precursors (OCPs). METHODS: Thirty-four TS girls and 24 controls were recruited. All subjects underwent anthropometric measures (height, weight, body mass index-BMI). A peripheral venous blood sample was collected to determine serum levels of active intact parathyroid hormone (PTH), 25-OH vitamin D, calcium, phosphorus, bone alkaline phosphatase (bALP), osteocalcin, sclerostin, DKK-1, RANKL and OPG. OCPs were detected by flow cytometry. In TS subjects bone mineralization was measured at lumbar spine by dual energy X-ray absorptiometry (DXA). RESULTS: bALP, 25-OH Vitamin D, and osteocalcin levels were significant lower in TS subjects than in the controls. Statistically significant higher levels of sclerostin, DKK-1 and RANKL were measured in patients compared with the controls. The percentage of OCPs did not show significant differences between patients and controls. Sclerostin and DKK-1 levels were related with anthropometric parameters, bone metabolism markers, HRT, rhGH therapy, RANKL and lumbar BMAD-Z-score. CONCLUSION: TS patients showed higher levels of sclerostin and DKK-1 than controls which can be related to HRT, and to reduced bone formation markers as well as the increased bone resorption activity.


Asunto(s)
Proteínas Adaptadoras Transductoras de Señales , Péptidos y Proteínas de Señalización Intercelular , Osteoporosis , Síndrome de Turner , Vía de Señalización Wnt , Proteínas Adaptadoras Transductoras de Señales/sangre , Fosfatasa Alcalina/sangre , Fosfatasa Alcalina/metabolismo , Biomarcadores/metabolismo , Densidad Ósea , Femenino , Marcadores Genéticos , Humanos , Péptidos y Proteínas de Señalización Intercelular/sangre , Masculino , Osteocalcina/metabolismo , Osteoporosis/sangre , Osteoporosis/metabolismo , Osteoporosis/patología , Síndrome de Turner/sangre , Síndrome de Turner/metabolismo , Síndrome de Turner/patología , Vitamina D/sangre
14.
J Pharm Pharm Sci ; 25: 84-92, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35245430

RESUMEN

PURPOSE: It has been shown that low Vitamin D serum concentration is associated with increased pneumonia and viral respiratory infections. Vitamin D is readily available, inexpensive, and easy to administer to subjects infected with COVID-19. If effective in reducing the severity of COVID-19, it could be an important and feasible therapeutic intervention. METHODS: We performed a systematic review and meta-analysis of the literature to determine the effects of Vitamin D serum concentration on mortality and morbidity in COVID-19 patients. The primary objectives were to determine if Vitamin D serum concentration decrease mortality, ICU admissions, ventilator support, and length of hospital stay in COVID-19 patients. RESULTS: A total of 3572 publications were identified. Ultimately, 20 studies are included. A total of 12,806 patients aged between 42 to 81 years old were analyzed. The pooled estimated RR for mortality, ICU admission, ventilator support and length of hospital stay were 1.49 (95% CI: 1.34, 1.65), 0.87 (95% CI: 0.67, 1.14), 1.29 (95% CI: 0.79, 1.84), and 0.84 (95% CI -0.45, 2.13). CONCLUSION: There is no statistical difference in mortality, ICU admission rate, ventilator support requirement, and length of hospital stay in COVID-19 patients with low and high Vitamin D serum concentration.


Asunto(s)
COVID-19/sangre , COVID-19/mortalidad , Vitamina D/sangre , COVID-19/virología , Humanos , Tiempo de Internación , Morbilidad
16.
Eur Rev Med Pharmacol Sci ; 26(2): 499-505, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-35113426

RESUMEN

OBJECTIVE: The aim of the study was to investigate the relationship between serum level of vitamin D, semen analysis parameters and sperm DNA damage in men with unexplained subfertility. PATIENTS AND METHODS: Fifty-eight men diagnosed with unexplained infertility and 50 age and BMI matched fertile men were included in the study. A participant whose semen parameter is normal but pregnancy is not achieved was accepted as unexplained male infertility. Blood samples were taken from all participants following three-day abstinence for measurement of vitamin D. Sperm DNA damage was assessed by Aniline Blue staining of the collected samples. RESULTS: Compared with the fertile men, male patients with unexplained infertility had significantly lower vit D levels (27.00 ng/mL (12.63-39.30) vs. 23.66 ng/mL (7.50-55.00), p<0.004). While the number of patients with vitamin D levels lower than 20 ng/mL was 26 (44.8%) in the infertile group, it was recorded as 5 (10.0%) in the fertile group (p<0.001). DNA damage was found in 31.50% (9.0-71.0) of the infertile men and 26.00% (11.0-54.0) of the fertile men. DNA damage was found to be significantly higher in the unexplained infertile group (p<0.002). In men with unexplained male infertility, serum vit D levels were positively correlated with total sperm count (r = 0.527, p<0.001), total motility (r = 0.527, p<0.001) and sperm morphology (r = 0.416, p = 0.001). There was a negative and significant correlation between vit D levels and sperm DNA damage (r = -0.605, p<0.001). In the logistic regression analysis, serum vit D > 20 ng/mL led to an improvement in fertility outcome. CONCLUSIONS: Men with unexplained infertility exhibit decreased serum vit D levels and increased sperm DNA damage.


Asunto(s)
Infertilidad Masculina , Semen , Vitamina D , Daño del ADN , Femenino , Humanos , Infertilidad Masculina/genética , Masculino , Embarazo , Recuento de Espermatozoides , Motilidad Espermática , Espermatozoides , Vitamina D/sangre
17.
Sci Rep ; 12(1): 1778, 2022 02 02.
Artículo en Inglés | MEDLINE | ID: mdl-35110608

RESUMEN

Serum total 25-OHD is a main marker of vitamin D which represents the intake and sunlight exposure. Free form of 25-OHD, the small fraction not bound to a transporter protein has been incorporated as a new marker. This cross-sectional study aimed to evaluate the impact of several factors on total and free vitamin D levels in healthy subjects and to find out if the free form of vitamin D could be a better representative of the body's vitamin D status. Total and free 25-OHD were analyzed by ELISA method in a blood sample collected from 391 apparently healthy volunteers (219 female and 172 Male) from Duhok Governorate/Iraq population. Total and free 25-OHD levels were increased proportionally to BMI with lower values seen in the underweight group, also a significant gender differences in total D3 level with higher values in males (23.90 ± 16.41) ng/ml than females (21.24 ± 15.65) ng/ml was observed. Total and Free 25-OHD levels were significantly associated with ages, their deficiency most frequent occurs in the younger ages between (16-25) years old. Smokers had higher level of Total 25-OHD (26.95 ± 19.01) ng/ml and Free 25-OHD (9.47 ± 4.94) pg/ml than nonsmokers (22.14 ± 14.59) ng/ml and (7.87 ± 4.32) pg/ml respectively. A significant increase in Free 25-OHD level in the veiled women (9.12 ± 4.64) ng/ml than unveiled (6.16 ± 3.73) ng/ml with a significant positive correlation between Free 25-OHD level and dress style was also seen. 30% and 33% of the participants whom their daily exposure to sunlight for 30 min and > 1 h respectively were severe deficient in total 25-OHD. 95% of the participants who had Abnormally low level of free D were exposed for ≥ 30 min to sunlight. Daily exposure to sunlight was negatively associated with Free 25-OHD level.


Asunto(s)
Biomarcadores/sangre , Deficiencia de Vitamina D/diagnóstico , Vitamina D/sangre , Vitaminas/sangre , Adolescente , Adulto , Anciano , Estudios Transversales , Femenino , Humanos , Irak/epidemiología , Masculino , Persona de Mediana Edad , Deficiencia de Vitamina D/sangre , Deficiencia de Vitamina D/epidemiología , Adulto Joven
18.
PLoS One ; 17(2): e0263069, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35113901

RESUMEN

OBJECTIVE: Studies have demonstrated a potential correlation between low vitamin D status and both an increased risk of infection with SARS-CoV-2 and poorer clinical outcomes. This retrospective study examines if, and to what degree, a relationship exists between pre-infection serum 25-hydroxyvitamin D (25(OH)D) level and disease severity and mortality due to SARS-CoV-2. PARTICIPANTS: The records of individuals admitted between April 7th, 2020 and February 4th, 2021 to the Galilee Medical Center (GMC) in Nahariya, Israel, with positive polymerase chain reaction (PCR) tests for SARS-CoV-2 (COVID-19) were searched for historical 25(OH)D levels measured 14 to 730 days prior to the positive PCR test. DESIGN: Patients admitted to GMC with COVID-19 were categorized according to disease severity and level of 25(OH)D. An association between pre-infection 25(OH)D levels, divided between four categories (deficient, insufficient, adequate, and high-normal), and COVID-19 severity was ascertained utilizing a multivariable regression analysis. To isolate the possible influence of the sinusoidal pattern of seasonal 25(OH)D changes throughout the year, a cosinor model was used. RESULTS: Of 1176 patients admitted, 253 had records of a 25(OH)D level prior to COVID-19 infection. A lower vitamin D status was more common in patients with the severe or critical disease (<20 ng/mL [87.4%]) than in individuals with mild or moderate disease (<20 ng/mL [34.3%] p < 0.001). Patients with vitamin D deficiency (<20 ng/mL) were 14 times more likely to have severe or critical disease than patients with 25(OH)D ≥40 ng/mL (odds ratio [OR], 14; 95% confidence interval [CI], 4 to 51; p < 0.001). CONCLUSIONS: Among hospitalized COVID-19 patients, pre-infection deficiency of vitamin D was associated with increased disease severity and mortality.


Asunto(s)
COVID-19/sangre , COVID-19/epidemiología , SARS-CoV-2/genética , Índice de Severidad de la Enfermedad , Deficiencia de Vitamina D/sangre , Deficiencia de Vitamina D/epidemiología , Vitamina D/análogos & derivados , Adulto , Anciano , Anciano de 80 o más Años , COVID-19/mortalidad , COVID-19/virología , Comorbilidad , Femenino , Humanos , Israel/epidemiología , Masculino , Persona de Mediana Edad , Admisión del Paciente , Pronóstico , Estudios Retrospectivos , Factores de Riesgo , Vitamina D/sangre
19.
Comput Math Methods Med ; 2022: 3059629, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35140804

RESUMEN

BACKGROUND: Diabetes mellitus type 2 and vitamin D deficiency are both prevalent in the Saudi Arabia. Vitamin D deficiency treatment with supplements carries a risk of intoxication. AIM: The present study is aimed at elucidating the effect of exercise on modulation of metabolic status and vitamin D level in patients with type 2 diabetes mellitus (T2DM). METHODS: A sum of 110 type 2 diabetic patients were voluntarily enrolled for the present investigation by dividing them into two separate groups (55 individuals for each group), the diabetic study group and diabetic control group. The diabetic study group was engaged in the training program using treadmill exercise. Laboratory parameters were monitored before and after the training program. RESULTS: There were significant elevation in the diabetic study group compared to diabetic control group regarding postexercise vitamin D level, high-density lipoprotein (HDL) (p value ≤ 0.001, 0.045; respectively). In addition, triglycerides, low-density lipoprotein (LDL), glycosylated hemoglobin (HbA1C), and homeostatic model assessment-insulin resistance (HOMA-IR) were significantly decreased (p value < 0.001 for all mentioned parameters). Moreover, there were significant higher level in postexercise parameters as compared to preexercise level in the diabetic study group. CONCLUSION: The exercise training program improved the metabolic control and vitamin D level after three months of intervention.


Asunto(s)
Diabetes Mellitus Tipo 2/metabolismo , Diabetes Mellitus Tipo 2/terapia , Terapia por Ejercicio/métodos , Ejercicio Físico/fisiología , Vitamina D/sangre , Adulto , Glucemia/metabolismo , Biología Computacional , Diabetes Mellitus Tipo 2/sangre , Femenino , Hemoglobina A Glucada/metabolismo , Humanos , Resistencia a la Insulina , Lípidos/sangre , Masculino , Persona de Mediana Edad , Arabia Saudita
20.
Biomed Environ Sci ; 35(2): 115-125, 2022 Feb 20.
Artículo en Inglés | MEDLINE | ID: mdl-35197176

RESUMEN

OBJECTIVE: To explore the association of single nucleotide polymorphisms (SNPs) of the vitamin D receptor gene ( VDR) with circulating lipids considering gender differences. METHODS: Of the Han Chinese adults recruited from a health examination center for inclusion in the study, the circulating lipids, 25-hydroxyvitamin D (25OHD), and other parameters were measured. The VDR SNPs of Cdx2 (rs11568820), Fok1 (rs2228570), Apa1 (rs7975232), and Taq1 (rs731236) were genotyped with a qPCR test using blood DNA samples, and their associations with lipids were analyzed using logistic regression. RESULTS: In the female participants ( n = 236 with dyslipidemia and 888 without dyslipidemia), multiple genotype models of Fok1 indicated a positive correlation of B (not A) alleles with LDLC level ( P < 0.05). In the male participants ( n = 299 with dyslipidemia and 564 without dyslipidemia), the recessive model of Cdx2 and the additive and recessive models of Fok1 differed ( P < 0.05) between the HDLC-classified subgroups, respectively, and Fok1 BB and Cdx2 TT presented interactions with 25OHD in the negative associations with HDLC ( P < 0.05). CONCLUSION: In the Chinese Han adults included in the study, the Fok1 B-allele of VDR was associated with higher LDLC in females, and the Fok1 B-allele and the Cdx2 T-allele of VDR were associated with lower HDLC in males. The interaction of VD and Fok1 BB or Cdx2 TT in males synergistically decreased HDLC levels.


Asunto(s)
/genética , Dislipidemias/genética , Predisposición Genética a la Enfermedad/genética , Lípidos/sangre , Polimorfismo de Nucleótido Simple , Receptores de Calcitriol/genética , Adulto , Alelos , China/etnología , Dislipidemias/sangre , Femenino , Predisposición Genética a la Enfermedad/etnología , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Factores Sexuales , Vitamina D/análogos & derivados , Vitamina D/sangre
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