Effect of ergocalciferol supplementation on serum parathyroid hormone and serum 25-hydroxyvitamin D in chronic kidney disease

AIM: To assess the impact of the administration of ergocalciferol on serum parathyroid hormone levels at different stages of chronic kidney disease (CKD). METHODS: A continuous series of 85 patients with stages 3-5 CKD but excluding patients on dialysis referred to the Kaiser Kidney Program were followed. Baseline serum intact parathyroid hormone (iPTH) and serum 25(OH)D levels were measured. All patients were administered ergocalciferol in doses ranging from 800 iu/day to 100,000 iu/week. We obtained serum levels of iPTH and 25(OH)D for a post-treatment endpoint after a median treatment period of 90 days. RESULTS: Pre- and post-treatment serum iPTH levels displayed a mean difference of 2.8 pmol/L (95% CI 1.3-4.4, P < 0.001). Patients with stage 4 CKD had a mean difference of 3.6 pmol/L (95% CI 1.7-5.5, P < 0.001) between pre- and post-iPTH levels. Serum iPTH levels decreased among CKD stages 3 and 5, but were not statistically significant. All CKD groups analysed in the present study had significant increases in serum 25(OH)D levels. None of the study population required cessation of vitamin D therapy and no adverse outcomes were reported. CONCLUSION: Ergocalciferol supplementation appears a safe and effective treatment for CKD populations which may raise levels of serum 25(OH)D levels and decrease iPTH levels.     

骨质疏松症患者血清25-羟维生素D水平的研究

目的：调查了解西安地区骨质疏松症患者体内维生素D 水平的状况。方法随机选取2012年12月－2013年11月我科440例骨质疏松症患者,采集其清晨空腹静脉血,用Cobase 6000型电化学发光仪（瑞士罗氏诊断）检测血中25（OH）D的水平,按照2012年12月－2013年5月为冬春季和2013年6月－2013年11月为夏秋季进行分组,用SPSS13．0软件进行数据分析。结果共调查了440例骨质疏松症患者,其中女性患者数量远大于男性患者,这些患者普遍存在着维生素D水平不足现象,其中维生素D严重缺乏和缺乏所占比例较大,男女两组在年龄和血清25（ OH） D水平上均无统计学差异,而且冬春季患者体内维生素D的水平要低于夏秋季的患者。结论本研究显示西安地区骨质疏松症患者维生素D不足现象比较普遍,男性女性之间无明显差别,而且体内维生素D水平与季节的变化有关,为骨质疏松症的防治提供一定的数据参考。     

Relationship between vitamin D status, parathyroid hormone levels and bone mineral density in patients with chronic kidney disease stages 3 and 4

AIM: Low vitamin D status is associated with secondary hyperparathyroidism and increased bone turnover in the general population and can aggravate the hyperparathyroidism of chronic kidney disease (CKD) patients. It is also correlated to low bone mineral density (BMD), but this correlation is less clear in CKD patients. Aims of our study were to investigate these associations in CKD stages 3 and 4 patients, and to identify significant predictors of BMD in this population. METHODS: Serum 25-hydroxyvitamin D (25OHD) levels, BMD at the femur and radius, and bone mineral metabolism parameters were measured in 89 CKD stages 3 and 4 patients. Vitamin D status was defined according to the NKF/KDOQI guidelines. RESULTS: Mean 25OHD levels were 53.8+/-32.1 nmol/L and correlated to the severity of proteinuria. Thirty-five patients (39%) had vitamin D insufficiency, 29 (33%) had vitamin D deficiency and five (6%) had severe deficiency. Of the 89 patients, two had osteoporosis and 31 had osteopenia either at femur or radius. Independent predictors for the total femur BMD were the intact parathyroid hormone (iPTH) levels and the body mass index (BMI). For the total radius BMD, independent predictor was only the BMI. Serum 25OHD levels were not directly associated with BMD, but they were independent predictors of iPTH. CONCLUSION: Vitamin D insufficiency and deficiency are very common in CKD stages 3 and 4 population and may indirectly affect, via effects on iPTH, the BMD of these patients.     

2型糖尿病患者血清25-经维生素D水平与骨密度的关系

目的 探讨2型糖尿病患者不同血清25-( OH) D水平与骨密度的关系。方法 选择住院的2型糖尿病患者288例,根据25-( OH) D水平对其进行分组：25-( OH) D>30ng/mL为维生素D充足组;20ng/mL <25-( OH ) D≤30 ng/mL为维生素D不足组;l0 ng/mL <25-( OH) D <20 ng/mL为维生素D缺乏组;25-( OH) D <10ng/mL为维生素D严重缺乏组。采用双能X线骨密度仪(DXA)测量受试者腰椎L1-4、股骨颈及全髓的骨密度。分析不同水平25-( OH ) D与骨密度的关系。结果 维生素D充足组、维生素D不足组、维生素D缺乏组、维生素D严重缺乏组的患者例数(所占比例)分别为10例(3. 5%) ,74例(25.7%) ,177例(61.5%) ,27例(9.3%)。不同性别组25-( OH ) D水平无明显差异,但是女性患者的腰椎L1-4、股骨颈、全髋的骨密度均较男性低。pearscm相关分析显示25-( OH) D水平与腰椎L1-4、股骨颈、全髓的骨密度均无相关性(分别为r=0.080 P=0.262;r=0. 139 P=0. 051;r=0.068 P=0. 342)。结论 2型糖尿病患者25-( OH) D水平与腰椎L1-4、股骨颈、全髓的骨密度均无明显相关性。     

25羟基维生素D与2型糖尿病患者动力性平衡功能的相关性分析

目的了解2型糖尿病患者25羟基维生素D水平与动力性平衡功能的关系及影响因素。方法选取2016年8月至2017年6月在我科住院的2型糖尿病患者235例,并根据25羟基维生素D水平将患者分为严重缺乏组、缺乏组、不足组及充足组。所有患者测定身高、体重、腰围、血压、空腹血糖、Hb A1c、25羟基维生素D,测定股骨骨密度、下肢震动阈值、踝臂指数,测定动力性平衡指标:站起测试(CRT)、走直线步态测试(TGT)、2.4米行走测试。结果四组间年龄、空腹血糖、糖化血红蛋白、收缩压、舒张压、腰围、体重指数之间差异均无统计学意义。与缺乏组、不足组及充足组相比,严重缺乏组股骨骨密度显著降低,差异具有统计学意义(P0.05),踝臂指数也显著降低;与不足组及充足组相比,缺乏组的踝臂指数显著降低,差异具有统计学意义(P0.05)。与不足组及充足组相比,严重缺乏组及缺乏组下肢震动阈值显著降低,差异具有统计学意义(P0.05)。与缺乏组、不足组及充足组相比,严重缺乏组的站起测试时间明显延长,缺乏组的站起测试时间较不足组延长,且缺乏组的站起测试较不足组及充足组延长,差异具有统计学意义。(P0.05)。与缺乏组、不足组及充足组相比,严重缺乏组的2.4米行走测试时间明显延长,缺乏组的2.4米行走测试时间较不足组延长,差异具有统计学意义(P0.05)。与缺乏组、不足组及充足组相比,严重缺乏组走直线步态测试正常的患者比例明显降低,差异具有统计学意义(P0.05)。多元回归分析显示,站起测试、2.4米行走测试为25羟基维生素D的独立影响因素,应用Logistic回归分析,结果显示25羟基维生素D及年龄与走直线步态相关。结论在2型糖尿病患者中25羟基维生素D水平与站起测试、2.4米行走测试之间存在独立负相关,与走直线步态测试之间存在独立的正相关。对糖尿病患者进行25羟基维生素D的筛查及补充仍有待进一步研究。     

2型糖尿病肾脏疾病患者尿白蛋白/肌酐比值与25-羟维生素D3的关系

目的 探讨2型糖尿病肾脏疾病（diabetic kidney disease,DKD）患者尿白蛋白/肌酐比值（UACR）与血清25-羟维生素D3 [25-（OH）-VitD3]之间的关系.方法 90例2型糖尿病患者根据UACR分为非糖尿病肾脏疾病组30例（UACR＜30 mg/g）、早期DKD组30例（30mg/g≤UACR＜300 mg/g）、临床DKD组30例（UACR≥300mg/g）,检测空腹血糖（FPG）、糖化血红蛋白（HbA1C）、血脂、血钙、血磷、血肌酐及C反应蛋白（CRP）,电化学发光法检测3组血清25-（OH）-VitD3水平,采用t检验、Pearson相关分析及Logstic回归分析统计学方法分析.结果 3组中随UACR均值增加（10.32mg/g,156.5mg/g,456.2 mg/g）,血清25-（OH）-VitD3水平逐渐降低[（41.6±10.68） nmol/L,（33.7±7.38） nmol/L,（24.9±6.21） nmol/L],且每2组之间比较均有统计学差异（均P＜0.05）;而CRP逐渐升高[（7.6±3.4） mg/L,（11.8±5.6） mg/L,（15.6±6.9）mg/L],且每2组之间比较均有统计学差异（均P＜0.05）;3组中FPG[（7.12±2.08）mmol/L,（9.84±3.47）mmol/L,（10.97±4.69）mmol/ L]、HbA1C[（7.43±2.06）％,（8.37±1.83）％,（9.52±2.27）％]每2组比较差异均有统计学意义（均P＜0.05）.多因素Logstic回归分析显示,血清25 （OH） VitD3水平与FPG、CRP及UACR呈负相关（r分别为-0.362,-0.421,-0.543,均P＜0.05）,与血钙、血磷、TG及血肌酐无相关性（均P＞0.05）.结论 25-（OH）-VitD3缺乏可能与2型DKD发生、发展相关.     

Serum 25-hydroxyvitamin D levels and testosterone deficiency in middle-aged Korean men: a cross-sectional study

Previous studies have demonstrated that male hypogonadism is associated with a low level of vitamin D. However, no reports have investigated the effects of vitamin D on testosterone levels in Korean men. Our aim was to investigate whether testosterone levels are associated with serum vitamin D levels and whether seasonal variation exists. This cross-sectional study analyzed serum 25-hydroxyvitamin D [25(OH)D], total testosterone (TT), and free testosterone (FT) in 652 Korean men over 40 years of age who had undergone a comprehensive medical examination. The average age of the subjects was 56.7 ± 7.9 years, and the mean serum 25(OH)D, TT and FT levels were 21.23 ± 7.9 ng ml⁻¹, 4.70 ± 1.6 ng ml⁻¹, and 8.12 ± 3.3 pg ml⁻¹, respectively. In the multiple linear regression model, 25(OH)D showed positive association with TT (β =0.137, P < 0.001) and FT (β =0.103, P = 0.008). 25(OH)D and FT showed similar seasonal or monthly variation after adjustment for age. A vitamin D deficiency [25(OH)D < 20 ng ml⁻¹] was associated with an increased risk of deficiencies of TT (<2.30 ng ml⁻¹) (odds ratio [OR]: 2.65; 95% confidence interval [CI]: 1.21–5.78, P = 0.014) and FT (<6.50 pg ml⁻¹) (OR: 1.44; 95% CI: 1.01–2.06 P = 0.048) after adjusting for age, season, body mass index, body composition, chronic disease, smoking, and alcohol use. In conclusion, we demonstrated a positive correlation between 25(OH)D and testosterone, which showed similar seasonal variation in Korean men.     

Renal function and 25-hydroxyvitamin D concentrations predict parathyroid hormone levels in renal transplant patients.

BACKGROUND: Recent guidelines suggest supplementation with ergocalciferol (vitamin D(2)) in chronic kidney disease stages 3 and 4 patients with elevated parathyroid hormone (PTH) levels and 25-hydroxyvitamin D (25OHD) levels <75 nmol/l. These guidelines are also applied to renal transplant patients. However, the prevalence rates of 25OHD deficiency and its association with PTH levels in renal transplant populations have not been extensively examined. We aimed to document the prevalence rates of 25OHD deficiency [defined by serum levels <40 nmol/l (<16 ng/ml)] and insufficiency [<75 nmol/l (<30 ng/ml)] in a single renal transplant centre, and examine its relationship with PTH levels. METHODS: Serum 25OHD and PTH concentrations were measured in 419 transplant patients attending a single renal transplant clinic over a 4-month period. Demographic and biochemical data were also collected, including serum creatinine, calcium, phosphate and albumin. Simple and multiple linear regression analysis were performed. RESULTS: In 27.3% of the patients, 25OHD deficiency was present, and 75.5% had insufficiency. On univariate analysis, 25OHD, serum albumin and estimated glomerular filtration rate (eGFR) were significantly associated with PTH levels (P < 0.0001, P = 0.004 and P < 0.0001, respectively). Multiple linear regression demonstrated that only 25OHD, eGFR and serum phosphate were significantly predictive of PTH levels (R(2) = 0.19, P < 0.0001). In this model, a 75 nmol/l increase in 25OHD will only result in a maximal reduction in PTH of 2.0 pmol/l. CONCLUSIONS: We conclude that 25OHD deficiency and insufficiency are common in renal transplant patients and may exacerbate secondary hyperparathyroidism. However, 25OHD, eGFR and phosphate only account for 19% of the variability in PTH levels. In addition, even a large increase in serum 25OHD levels is likely to result in only a small reduction in PTH. Therefore, alternative approaches to managing hyperparathyroidism in renal transplant recipients rather than supplementation with ergocalciferol are warranted.     

慢性肾脏病患者25-羟维生素D3水平的改变及其影响因素分析

目的检测慢性肾脏病(chronickidneydisease,CKD)患者不同进展阶段25-羟维生素D3[25(OH)D3]的浓度,25(OH)D3水平与CKD发生、发展的关系,进一步探讨活性维生素D在CKD患者中的合理应用。方法收集2014年11月至2015年11月中国医科大学附属第一医院肾脏内科住院的非血液净化的CKD患者885例及急性肾损伤患者11例,分别测定25(OH)D3及血红蛋白(hemoglobin,Hb)、血肌酐(SCr)、尿素氮(BUN)、血清胱抑素C(Cystatin C,Cys-C)、血钙、血磷、血碳酸氢根(HCO)3)、血尿酸(uric acid,UA)、血总胆固醇(total cholesterol,TC)、三酰甘油(triglyceride,TG)、低密度脂蛋白胆固醇(low density lipoprotein cholesterol,LDL-C)、高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)、血白蛋白(albumin,Alb)、血清碱性磷酸酶(alkaline phosphates,ALP)、C反应蛋白(C-reactive protein,CRP)、糖化血红蛋白(-HbAlC)及采用化学发光法测量血清全段甲状旁腺素(immunoreactive parathyroid hormone,讧TH)。统计CKD不同阶段25(OH)D3不足及缺乏的发生率,分析不同维生素D水平分组下各项生化指标的变化趋势并进行相关性分析。结果①随肾脏病的进展,维生素D严重缺乏的发生率呈升高趋势。急性肾损伤患者25(OH)D3水平为(15.8±9.16)ng/ml,明显高于CKD各期(P0.05)。随25(OH)D3水平下降,患者的血压(收缩压、舒张压)水平升高,尿蛋白的程度加重,血白蛋白水平下降,钙磷代谢紊乱(血钙下降,血磷升高)及血脂代谢异常加重,不同维生素D水平分组间差异有统计学意义(P0.05),而年龄、左室射血分数、肾功能相关指标、骨代谢指标、血尿酸、血红蛋白、C反应蛋白则无统计学差异(P0.05);②25(OH)D3水平与尿蛋白程度相关,中度尿蛋白组和大量尿蛋白组25(OH)D3浓度均明显低于正常尿蛋白组和低尿蛋白组(P0.05);且随着蛋白尿病情加重,维生素D严重缺乏的发生率升高,在各尿蛋白组间差异有统计学意义(χ~2=251.75,P=0.000)。③25(OH)D3水平与血白蛋白、血钙、血红蛋白水平呈正相关;与收缩压、舒张压、尿蛋白定量、磷、血脂水平呈负相关。血白蛋白、收缩压、尿蛋白定量、血红蛋白是25(OH)D3水平的独立危险因素。结论我国东北地区CKD患者维生素D缺乏更加严重。25(OH)D3水平与CKD临床重要指标相关。血白蛋白、收缩压、24 h尿蛋白定量、血红蛋白是25(OH)D3水平的独立危险因素。     

Association between vitamin D deficiency and diabetic foot ulcer wound in diabetic subjects: A meta-analysis

A meta-analysis was performed to evaluate the association between vitamin D deficiency and diabetic foot ulcer wounds in diabetic subjects. A systematic literature search up to March 2022 incorporated 7586 subjects with diabetes mellitus at the beginning of the study; 1565 were using diabetic subjects with foot ulcer wounds, and 6021 were non-ulcerated diabetic subjects. Statistical tools like the dichotomous and contentious method were used within a random or fixed-influence model to establish the odds ratio (OR) and mean difference (MD) with 95% confidence intervals (CIs) to evaluate the influence of vitamin D deficiency in managing diabetic foot ulcer wound. Diabetic subjects with foot ulcer wounds had significantly lower vitamin D levels (MD, −6.48; 95% CI, −10.84 to −2.11, P < .004), higher prevalence of vitamin D deficiency (<50 nmoL/L) (OR, 1.82; 95% CI, 1.32-2.52, P < .001), and higher prevalence of severe vitamin D deficiency (OR, 2.53; 95% CI, 1.65-3.89, P < .001) compared with non-ulcerated diabetic subjects. Diabetic subjects with foot ulcer wounds had significantly lower vitamin D levels, higher prevalence of vitamin D deficiency, and higher prevalence of severe vitamin D deficiency compared with non-ulcerated diabetic subjects. Further studies are required to validate these findings.     

未绝经女性甲亢患者血25羟维生素D水平与骨密度的关系

目的 观察未绝经女性甲亢患者骨密度及血钙、血磷、血碱性磷酸酶（ALP）、血浆25羟维生素D[25(OH)D]、血浆甲状旁腺激素（PTH）水平变化,分析未绝经女性甲亢患者血浆25(OH)D与骨密度的关系。方法 选取50例初发或复发的未绝经女性甲亢患者,51例正常对照人群,应用双能X线吸收仪（DXA）测定腰椎1-4、股骨颈、股骨大转子、Ward三角和全股骨的骨密度,电化学发光法测定血浆25(OH)D和PTH,生化法测定血钙、磷、ALP。结果 甲亢组L1、Ward三角骨密度均低于对照组,差异有统计学意义。与对照组相比,甲亢组血钙、血ALP、血浆25(OH)D水平升高,血浆PTH降低,差异均有统计学意义。甲亢组维生素D缺乏17例(34%) , 不足19例(38%) , 充足14例(28%)。对照组维生素D缺乏30例(59%) , 不足18例(35%), 充足3例(6%)。相关分析示,两组血浆25（OH）D与L1、L2、L3、L4、L1-4、股骨颈、股骨大转子、Ward三角、全股骨骨密度均无相关性。Pearson相关分析示,甲亢组血浆25(OH)D与PTH呈负相关（r=-0.378,P<0.01）。结论 未绝经女性甲亢患者L1、Ward三角骨密度降低。未绝经女性甲亢患者血浆25(OH)D升高,可能与高血钙、PTH分泌抑制、高血磷导致1-α-羟化酶活性降低有关。未绝经女性甲亢患者血浆25(OH)D水平与骨密度无直接关系。     

3 326例南京地区人群维生素D水平与季节关系调查

目的通过测定江苏省中医院2017年就诊患者体内25羟维生素D[25(OH)D]水平,分析目前维生素D水平状况并评价其与季节的关系。方法收集2017年1月1日至2017年12月31日在江苏省中医院测25(OH)D水平的门诊及住院患者3 326例,主要来源于内分泌科、生殖医学科、体检中心等就诊的南京市居民,排除相关影响因素,分别比较不同季节、性别的25(OH)D水平和维生素D营养状况差异。结果 3 326例患者的25(OH)D的平均水平为18.38 ng/mL,维生素D缺乏率为63.3%,不足率为29.0%,正常率为7.7%;春夏两季维生素D水平高于秋冬两季(P0.05);女性维生素D水平明显低于男性(P0.05)。结论南京地区人群存在不同程度的维生素D缺乏,且具有季节差异性,秋冬季节25(OH)D的水平更低,与性别也相关联。维生素D作为人体内不可缺少的维生素对骨骼系统具有重要作用,提高公众合理补充维生素D的意识并针对高危人群及时补充钙剂是必要的,定期检测25(OH)D作为评估体内维生素D水平的常规实验室检查,为临床正确应用维生素D提供科学的理论依据。     

Association between quantitative measures of skin color and plasma 25-hydroxyvitamin D

Summary  We examined the relationship between vitamin D and skin color measured by reflectance colorimetry at an exposed and un-exposed site in 321 people. Exposed but not unexposed skin color was associated with better vitamin D status. Sun-exposure was more important than natural skin color in determining vitamin D status in our population. Introduction  Vitamin D is obtained through UV synthesis in the skin where melanin limits its synthesis. Ethnicity is often used as a proxy for skin color, but skin color varies considerably. The relation between quantitative measures of skin color and plasma 25-hydroxyvitamin D (25OHD) concentration has not been well described. Methods  The aim of this study was to determine the association between constitutive (natural) and sun-induced skin color and 25OHD in a group of Pacific People (n = 87) and Europeans (n = 255) living in NZ (46°S) in summer. Plasma 25OHD was determined and sun-induced (outer fore-arm) and constitutive (upper inner-arm) measured by reflectance colorimetry. Results  Mean (SD) 25OHD was significantly higher in Europeans than Pacific People, 88 (31) nmol/L vs. 75 (34) nmol/L, respectively. Based on constitutive skin color, 35% of participants were very light, 45% light, 16% intermediate, 4% tanned, and 0% brown or dark. Skin color at the forearm but not constitutive skin color was a significant predictor of 25OHD. Each 10° lower skin color value at the forearm (more tanning) was associated with a 5 nmol/L higher 25OHD (P < 0.001). Conclusions  Tanning but not natural skin color was an important determinant of 25OHD. Further study is needed in a population with a higher proportion of darker skin people.     

Relation of glycated hemoglobin and vitamin D deficiency with erectile dysfunction in patients with type 2 diabetes mellitus

Erectile dysfunction (ED) is seen very often in the men with type 2 diabetes mellitus (DM). Due to the ability of vitamin D to reduce endothelial damage and oxidative stress, its role in preventing cardiovascular risk has been demonstrated in some studies. Since ED and cardiovascular disease have common pathogenic mechanisms, many studies have evaluated a possible relationship between vitamin D deficiency and ED. Total 120 patients with type 2 diabetes mellitus were evaluated in this study. Vitamin D and HbA1c values were statistically compared according to International Index of Erectile Dysfunction (IIEF-5) scores. 23.3% of 120 patients had mild, 38.3% had mild to moderate, 21.7% had moderate and 16.7% had severe ED. There was statistically difference in vitamin D levels of the patients according to IIEF-5 scores. Also, significant difference was found in HbA1c levels between the patients with severe ED and other groups. Cut-off point for vitamin D and HbA1c were determined according to IIEF-5 score in patients who were divided in to two groups (14.41 and 11.1). A statistically significant correlation was found between both cut-off points and IIEF-5 scores. Our study shows that patients with ED have a vitamin D deficiency and a poor glycemic control.     

肌注维生素D2治疗维持性血液透析患者25羟维生素D缺乏的临床观察

目的分析维持性血液透析患者的血清25-羟维生素D[25(OH)D]水平,探讨肌注维生素D2注射液治疗25羟维生素D缺乏的作用。 方法检测我院2020年12月至2021年2月170例维持性血液透析患者空腹血清25(OH)D水平,根据血清25(OH)D水平将患者分为严重缺乏组、缺乏组、不足组和正常组。分析血清25(OH)D水平与患者性别、年龄、透析龄、血红蛋白、白蛋白、血钙、血磷、全段甲状旁腺激素(iPTH)的相关性。其中86例维生素D缺乏或不足的血透患者,随机分为对照组(n＝43)和治疗组(n＝43),对照组给予常规治疗,治疗组在对照组基础上给予肌注维生素D2 (20万单位,1次/2周),连续3个月。比较患者治疗前后血清25(OH)D、血红蛋白、白蛋白、钙、磷、iPTH水平的变化,并观察不良反应情况。 结果170例患者中,维生素D严重缺乏组33例(19.4%),缺乏组33例(19.4%),不足组70例(41.2%),正常组34例(20%)。男性25(OH)D水平显著高于女性(P<0.05)。正常组与维生素D缺乏组和不足组在透析龄、血红蛋白、白蛋白差异方面均具有统计学意义(P<0.05)。血清25(OH)D与年龄、血钙、血磷、甲状旁腺激素无显著相关性(P>0.05)。多元线性逐步回归分析显示,血清25(OH)D与血红蛋白、白蛋白具有相关性(P<0.05)。肌注维生素D2 3月后可使血液透析患者的25(OH)D水平显著上升(P<0.05),同时血红蛋白、血清白蛋白、磷上升(P<0.05),对血钙、iPTH无显著影响(P>0.1)。 结论维持性血液透析患者维生素D缺乏发生率高,血清25(OH)D水平与性别、贫血、营养不良存在密切关系,肌注维生素D2可改善血透患者贫血、营养不良情况,但可能带来血磷升高。     

Association between vitamin D deficiency and diabetic foot ulcer wound in diabetic subjects: A meta‐analysis

A meta‐analysis was performed to evaluate the association between vitamin D deficiency and diabetic foot ulcer wounds in diabetic subjects. A systematic literature search up to March 2022 incorporated 7586 subjects with diabetes mellitus at the beginning of the study; 1565 were using diabetic subjects with foot ulcer wounds, and 6021 were non‐ulcerated diabetic subjects. Statistical tools like the dichotomous and contentious method were used within a random or fixed‐influence model to establish the odds ratio (OR) and mean difference (MD) with 95% confidence intervals (CIs) to evaluate the influence of vitamin D deficiency in managing diabetic foot ulcer wound. Diabetic subjects with foot ulcer wounds had significantly lower vitamin D levels (MD, −6.48; 95% CI, −10.84 to −2.11, P < .004), higher prevalence of vitamin D deficiency (<50 nmoL/L) (OR, 1.82; 95% CI, 1.32‐2.52, P < .001), and higher prevalence of severe vitamin D deficiency (OR, 2.53; 95% CI, 1.65‐3.89, P < .001) compared with non‐ulcerated diabetic subjects. Diabetic subjects with foot ulcer wounds had significantly lower vitamin D levels, higher prevalence of vitamin D deficiency, and higher prevalence of severe vitamin D deficiency compared with non‐ulcerated diabetic subjects. Further studies are required to validate these findings.     

Insight into the impact of vitamin D on cardiovascular outcomes in chronic kidney disease

Patients with chronic kidney disease (CKD) experience excess cardiovascular morbidity and mortality that is unexplained by traditional cardiovascular risk factors. Vitamin D deficiency is highly prevalent in CKD and is associated with increased cardiovascular mortality in both the general population and in CKD patients. Vitamin D supplementation is a reasonably safe and simple intervention and meta‐analyses of observational studies have suggested that vitamin D supplementation in CKD improves cardiovascular mortality. However, randomized controlled trials examining the impact of vitamin D supplementation in improving surrogate markers of cardiovascular structure and function remain inconclusive. This review investigates the impact of vitamin D supplementation on surrogate end‐points and cardiovascular events from trials in CKD; and discusses why results have been heterogenous, particularly critiquing the effect of different dosing regimens and the failure to take into account the implications of vitamin D supplementation in study participants with differing vitamin D binding protein genotypes.     

2型糖尿病视网膜病变合并骨质疏松患者血清25(OH)D与Betatrophin的关系

目的探讨2型糖尿病视网膜病变(type 2 diabetes mellitus retinopathy,T2DR)合并骨质疏松(osteoporosis,OP)患者血清25羟维生素D[25-hydroxy vitamin D,25(OH)D]与Betatrophin之间的关系。方法选取2016年11月-2017年9月在我院内分泌科就诊的2型糖尿病(Type 2 Diabetes Mellitus,T2DM)患者100例,通过非散瞳眼底检查将T2DM患者分为并发DR组35例和非DR组65例,再据骨密度测定结果将DR组分为合并骨质疏松组(T2DM+DR+OP组)15例及非骨质疏松组(T2DM+DR组)20例,将非DR组分为合并骨质疏松组(T2DM+OP组)25例及非骨质疏松组(T2DM组)40例。同期随机筛选健康体检中心不同年龄健康受试者60例为正常对照(normal control,NC)组。酶联免疫吸附(ELISA)法测定所有受试者血清中Betatrophin水平,电化学发光法测定25(OH)D水平。结果与非骨质疏松的2型糖尿病视网膜病变患者相比,合并骨质疏松的2型糖尿病视网膜病变患者血清25(OH)D水平降低,Betatrophin水平升高,差异具有统计学意义(P0.05)。结论血清中25(OH)D水平降低及Betatrophin水平升高,可能共同参与了2型糖尿病视网膜病变、骨质疏松的发生发展。     

老年女性血清25-羟基维生素D的独立相关因素

目的通过筛选老年女性血清25-羟基维生素D[25(OH)D]的独立相关因素,寻找提高老年女性血清25(OH)D的方法。方法对280例老年女性进行伴随疾病和生活方式的调查,并进行骨代谢、血液生化、性激素和贫血等指标的检测,运用多元回归分析方法筛选老年女性血清25(OH)D的独立相关因素。结果老年女性血清25(OH)D的独立相关因素包括血PTH(β=-0.097,P0.01)、血磷(β=-18.144,P0.01)、血钙(β=19.912,P0.01)、服用复方钙剂(β=5.362,P0.01)和晒太阳(β=0.974,P0.05)。结论坚持晒太阳、服用复方钙剂和补充维生素D,可能是提高老年女性血清25(OH)D水平的重要方法。