斯奇康治疗小儿慢性腹泻疗效与T淋巴细胞亚群变化的关系

目的:研究斯奇康治疗慢性腹泻患儿的疗效及与T淋巴细胞亚群变化的关系。方法:对30例慢性腹泻患儿,用斯奇康注射液治疗6周,观察病情变化。同时治疗前后分别测定患儿血清CD3、CD4、CD8及CD4/CD8。来自门诊保健的同龄正常婴幼儿25例为对照组。结果:总有效率达93.34%。慢性腹泻组治疗前CD3、CD4、CD4/CD8降低,CD8升高,与斯奇康治疗后、对照组相比,差异无有统计学意义(P<0.05)。慢性腹泻组治疗后与正常对照组相比CD3、CD4、CD8、CD4/CD8差异无统计学意义(P>0.05)。结论:慢性腹泻患儿存在有细胞免疫缺陷;斯奇康可有效改善慢性腹泻患儿T细胞亚群状况,对提高患儿整体免疫功能水平具有重要意义。     

过敏性鼻炎儿童血清维生素D水平与T淋巴细胞亚群的相关性研究

目的探讨过敏性鼻炎儿童血清维生素D水平与T淋巴细胞亚群之间的关系。方法选择海珠区妇幼保健院1岁以上的过敏性鼻炎患儿200名(实验组)及正常儿童200名(对照组),应用串联质谱仪检测其血清维生素D水平,采用流式细胞技术检测患儿血中CD8+、CD8+CD28+、CD8+CD28-、CD28+T淋巴细胞亚群的表达情况。统计对比维生素D水平与T淋巴细胞亚群、Ig E相关性。结果实验组总维生素D及维生素D3水平低于对照组(p<0.05),两组维生素D2水平无显著性差异(p>0.05)。随着维生素D水平的下降,Ig E显著升高,CD8+变化不明显,CD8+CD28+及CD28+的百分比逐渐上升,CD8+CD28-的百分比则在不断的下降。结论过敏性鼻炎儿童血清维生素D水平比正常儿童偏低,且以维生素D3水平偏低为主。维生素D缺乏越严重,CD8+、CD8+CD28+、CD8+CD28-、CD28+T淋巴细胞亚群失衡越厉害,Ig E水平也越高。     

毛细支气管炎婴幼儿T淋巴细胞亚群、25羟基维生素D水平分析

目的 探讨婴幼儿25羟基维生素D、T淋巴细胞亚群水平与毛细支气管炎的发生和病情程度的关系。方法 选择2019年5月—2020年6月本院收治的72例毛细支气管炎患儿作为观察对象,另外选择同期体检的50例健康儿童作为对照组,比较2组25(OH) D、T淋巴细胞亚群水平,并分析二者水平与毛细支气管炎发病风险和病情程度的关系。结果 观察组CD3⁺、CD4⁺、CD4⁺/CD8⁺、25(OH) D水平明显低于对照组,差异有统计学意义(P<0.05);CD3⁺、CD4⁺、CD4⁺/CD8⁺、25(OH) D与婴幼儿毛细支气管炎的发生显著相关(P<0.05);CD3⁺与病情严重程度评分无显著相关性(P>0.05),CD4⁺、CD4⁺/CD8⁺、25(OH) D与病情程度评分呈负相关关系(r值分别为-0.688、-0.784、...     

血清25-羟维生素D3和T淋巴细胞亚群与儿童哮喘发病风险和控制水平的关系

目的 探讨血清25-羟维生素D₃[25-(OH)D₃]和T淋巴细胞亚群与儿童哮喘发病风险和控制水平的关系。方法 选择2020年5月—2022年4月收治的83例哮喘患儿作为研究对象(哮喘组),另外选择50例健康体检儿童作为健康组,比较2组儿童25-(OH)D₃和T淋巴细胞亚群水平;根据哮喘控制水平分级标准将患儿分为良好控制组53例、部分控制组19例、未控制组11例,比较不同控制水平患儿的25-(OH)D₃和T淋巴细胞亚群水平,分析25-(OH)D₃与T淋巴细胞亚群水平的关系。结果 哮喘组患儿25-(OH)D₃、CD3、CD4、CD4/CD8、NK细胞低于健康组(P<0.05);25-(OH)D₃、CD3、CD4、CD4/CD8是哮喘的主要影响因素(P<0.05);未控制组和部分控制组患儿25-(OH)D₃、CD3、CD4、CD4/CD8、NK细胞水平低于良好控制组(P<0.05),且未控制组患儿水...     

维生素A对实验动物T淋巴细胞亚群的影响

某些研究结果已证实,婴幼儿通常存在潜在维生素A(VA)缺乏的危险性。在局部地区进行VA干预性试验结果表明,接受VA强化的儿童中,呼吸道和消化道感染性疾病的发生率明显下降。这些临床观察说明,VA在免疫功能方面起着重要的作用,但VA和人体免疫反应之间的许多机制还不清楚。本实验的目的是观察VA对兔细胞免疫功能的影响,从而为探索VA和细胞免疫之间的关系提供实验基础。     

维生素E对小鼠胸腺、脾脏T淋巴细胞及亚群的影响

五组初断奶小鼠分别饲喂生育酚（ＶＥ）缺乏，合有Ｖｈ１／３、正常、３倍及２０倍需要量的膳食，８周后观察Ｔ淋巴细胞及亚群的变化。结果表明：补充ＶＥ后，小鼠脾脏指数显著增高，胸腺指数仅略有上升，并提高Ｔ细胞、Ｔ＿Ｈ亚群百分率，降低Ｔ＿ｓ亚群百分率，使Ｔ＿Ｈ／Ｔ＿ｓ比值增高。提示：ＶＥ刺激脾脏细胞增生更为显著，ＶＥ促进Ｔ细胞的成熟、分化。ＶＥ影响免疫反应的作用可能是通过提高Ｔ＿Ｈ／Ｔ＿ｓ比值而进行调节的。除２０倍需要量组外，饲料中ＶＥ重与Ｔ细胞及亚群的提高相关，认为３倍需要量为合适剂量。     

新生儿社区获得性肺炎与血清25羟维生素D、淋巴细胞亚群关系分析

目的 分析新生儿社区获得性肺炎患儿血清25羟维生素D水平及淋巴细胞亚群变化,为临床治疗提供科学依据。方法 随机选取2018年11月-2019年1月在永康市第一人民医院诊断为社区获得性肺炎的68例足月新生儿为观察组,同期在本院产科出生的68例健康足月新生儿为对照组。采用BIO-RAD 680酶标仪ELISA法检测血清25羟维生素D水平及采用BD公司Facs Canto2流式细胞仪检测淋巴细胞亚群。结果 观察组与对照组比较,观察组血清25羟维生素D水平明显低于对照组,差异有统计学意义(t=6.815,P＜0.01)。观察组CD3+ 和CD4+细胞阳性率以及CD4+/CD8+比值,均显著低于照组(t=2.912、2.947、3.115,P＜0.01);观察组CD19+细胞阳性率显著高于对照组(t=5.565,P＜0.01)。观察组中25羟维生素D 缺乏组与正常组比较,缺乏组CD3+和CD4+细胞阳性率以及CD4+/CD8+,均显著低于正常组(t=3.084、4.234、3.021,P＜0.01);而缺乏组CD19+细胞阳性率显著高于正常组(t=3.515,P＜0.01)。结论 社区获得性肺炎新生儿的25羟维生素D缺乏发生率较高;社区获得性肺炎新生儿细胞免疫水平偏低,可能与25维生素D水平低有关。     

中老年脊柱手术后患者血清维生素D和T细胞亚群水平变化与术后感染的关系

目的 探讨维生素D(VitD)和T细胞亚群水平变化与中老年脊柱手术后患者感染的关系。方法 以2013年1月至2017年12月某院脊柱手术后并发感染的中老年患者41例为观察组并分为感染评分高组和低组,选择同期治疗42例手术后未感染者为对照组;抽取静脉血检测患者血清VitD和T细胞亚群(CD3+数目以及CD4+/CD8+)水平情况。结果 感染评分高、低组VitD水平、CD3+数目及CD4+/CD8+比值均低于对照组(P＜0.05);感染评分高组VitD水平、CD3+数目及CD4+/CD8+比值低于低组(P＜0.05);Spearman相关分析显示老年脊柱手术后患者VitD水平、CD3+数目、CD4+/CD8+比值与感染评分呈负相关(P＜0.001);多重线性回归分析显示,VitD水平与CD3+数目及CD4+/CD8+比值呈正相关(t=6.842和6.9333,P<0.001)。结论 VitD和Ｔ淋巴细胞亚群水平降低的中老年脊柱手术后患者感染风险增加;VitD水平与中老年脊柱手术后患者免疫功能相关。     

不同剂量维生素D治疗反复呼吸道感染患儿的疗效及对T淋巴细胞亚群和免疫球蛋白水平的影响

目的 分析不同剂量维生素D治疗反复呼吸道感染患儿的疗效及对T淋巴细胞亚群和免疫球蛋白水平的影响。方法 将2020年4月—2021年4月在丽水市中心医院接受治疗的反复呼吸道感染患儿98例依据入院先后顺序分为对照组(49例)和研究组(49例)。对照组予以低剂量维生素D(400 IU/d)治疗,研究组予以高剂量维生素D(800 IU/d)治疗,两组均连续治疗4周。比较两组患儿治疗前后血清25-羟维生素D₃[25-(OH)D₃]水平、呼吸道感染次数、T淋巴细胞亚群(CD3⁺、CD4⁺、CD8⁺、CD4⁺/CD8⁺)以及免疫球蛋白(IgA、IgG、IgM)水平,并对比两组的治疗效果和安全性。结果 研究组治疗前后呼吸道感染次数分别为(5.48±1.46)次/年和(2.87±0.51)次/年,25-(OH)D₃水平分别为(23.89±5.74)nmol/L和(43.69±8.85)nmol/L;对照组治疗前后呼吸道感染次数分别...     

尘肺病患者外周血维生素D与淋巴细胞亚群、炎症因子的相关性研究

目的 了解尘肺病患者的维生素D水平,并分析维生素D与炎症因子、淋巴细胞亚群各指标之间的相关性.方法 选取60名老年男性健康体检人员为对照组,182名尘肺病患者为研究组,比较两组的维生素D水平;同时分析研究组维生素D水平、尘肺病期别与炎症因子、淋巴细胞亚群的相关性.结果 182名尘肺病患者维生素D缺乏人员的占比高于对照组...     

Effects of Vitamin D3 and Calcium Supplementation on Serum Levels of Tocopherols,Retinol, and Specific Vitamin D Metabolites

γ-Tocopherol (γT) protects against DNA-damaging effects of nitrogen oxides, yet its physiologic regulation in vivo is unknown. Observational studies indicate inverse associations of 25[OH]-vitamin D with γT and leptin. To determine whether vitamin D₃ supplementation alters levels of lipid-soluble micronutrients, serum samples (N = 85 subjects) from a randomized, double-blind, placebo-controlled clinical trial of vitamin D₃ (800 IU) and calcium (2 g), alone and in combination, were analyzed for lipid micronutrients and specific vitamin D metabolites at baseline and after 6 mo of supplementation. Serum 25[OH]-vitaminD₃ levels increased 55% (P < 0.0001) and 48% (P = 0.0005), whereas 25[OH]-vitaminD₂ levels were lower by 48% (P = 0.26) and 21% (P = 0.36) in the vitamin D₃ and vitamin D₃ plus calcium groups, respectively. At baseline, γT levels were inversely associated with 25[OH]D (r = ?0.31, P = 0.004). With vitamin D₃ plus calcium treatment, serum α-tocopherol decreased 14% (P = 0.04), whereas similar changes in γT (19% lower, P = 0.14) were observed. No significant effects were observed for D₃ supplementation on leptin or retinol levels. These results are consistent with the hypothesis that vitamin D₃ ± calcium affects serum tocopherol and 25[OH]D₂ levels; however, studies using larger, more homogeneous populations are warranted.     

Association between Vitamin D Receptor Polymorphism and Serum Vitamin D Levels in Children with Low-Energy Fractures

Objective: Fractures of bones, especially forearm fractures, are very common in children and their number is increasing. This study was designed to determine the impact of vitamin D serum levels and vitamin D receptor (VDR) polymorphisms on the occurrence of low-energy fractures in children.

Methods: The study group consisted of 100 children with clinically relevant bone fractures and a control group consisted of 127 children without fractures. Total vitamin D [25(OH)D3 plus 25(OH)D2] serum concentrations were evaluated in every patient. Genotypes for 4 restriction fragment length polymorphisms of the vitamin D receptor gene (FokI, ApaI, TaqI, and BsmI) were determined by standard polymerase chain reaction–restriction fragment length polymorphism (PCR-RFLP) techniques.

Results: Differences in concentrations of vitamin D were observed between the group with bone fractures (median = 12 ng/ml) and the control group (median = 16 ng/ml; p = 0.000044).

Higher levels of vitamin D reduced the risk of fracture by 1.06 times (p = 0.0005). No impact of particular VDR polymorphism on the occurrence of low-energy fractures in children was detected. However, there were significant differences in the prevalence of FokI polymorphism genotypes between the fracture and control groups (p = 0.05). Furthermore, the recessive “aa” genotype of ApaI polymorphism and the dominant “TT” genotype of TaqI polymorphism were associated with higher levels of vitamin D (p = 0.005 and p = 0.036, respectively).

Conclusions: Vitamin D deficiency is an independent risk factor for fractures in children. ApaI polymorphism recessive “aa” and TaqI polymorphism dominant “TT” genotypes are associated with higher levels of vitamin D in serum.     

The Association between Serum Vitamin D Levels and Helicobacter pylori Presence and Eradication

Background: The success of Helicobacter pylori (H. pylori) eradication depends on several host and treatment factors. Serum vitamin D levels may be associated with H. pylori infection and eradication rates. We investigated the association between vitamin D and H. pylori infection and eradication, using a large electronic database based on medical records from a population-based health maintenance organization. Methods: Data regarding adults who underwent H. pylori testing and had vitamin D measurements within one month of H. pylori testing were collected. H. pylori infection was ascertained using urea breath or stool antigen tests. A negative H. pylori test following a positive result implied eradication. Multivariate regression models were constructed to assess associations between H. pylori infection, eradication, and vitamin D. Results: Among 150,483 members who underwent H. pylori testing from 2009 to 2018, 27,077 (18%) had vitamin D measurements. Vitamin D levels were inversely associated with H. pylori infection, p < 0.001. The odds of a positive H. pylori test were 31% higher among patients with vitamin D levels <20 ng/mL, compared with those with levels ≥20 ng/mL (OR 1.31, 99% CI 1.22–1.4, p < 0.001). Purchase of vitamin D supplements was associated with a negative subsequent H. pylori test (p < 0.001). Mean vitamin D levels were moderately higher in those with successful vs. failed H. pylori eradication (19.34 ± 9.55 vs. 18.64 ± 9.61, p < 0.001). Conclusions: Vitamin D levels are associated with H. pylori infection. Increased vitamin D levels are associated with successful H. pylori eradication. Vitamin D may have a role in H. pylori eradication.     

布地奈德辅助治疗对支气管哮喘患儿血清T淋巴细胞亚群及相关细胞因子的影响

目的探讨布地奈德辅助治疗对支气管哮喘患儿血清T淋巴细胞亚群及相关细胞因子的影响。方法将70例支气管哮喘患儿分为实验组与对照组各35例。对照组予以常规治疗,实验组在对照组基础上采用布地奈德辅助治疗。比较两组患儿治疗前后的血清T淋巴细胞亚群、细胞因子水平以及不良反应。结果治疗后,两组的CD3+、 CD4+、 CD4+/CD8+水平提高,CD8+水平降低(P <0.05);实验组的CD3+、 CD4+、 CD4+/CD8+水平高于对照组,CD8+水平低于对照组(P <0.05)。治疗后,两组的血清IL-12、 IL-1β、 CRP、 TNF-α水平降低,且实验组的血清IL-12、 IL-1β、 CRP、 TNF-α水平低于对照组(P <0.05)。两组患儿治疗期间不良反应发生率比较无统计学差异(P>0.05)。结论布地奈德辅助治疗支气管哮喘患儿的效果满意,可有效改善血清T淋巴细胞亚群与细胞因子水平,值得推广。     

浙江地区健康青少年和成人外周血T淋巴细胞免疫表型调查及正常参考值范围的建立

目的通过对健康青少年和成人外周血T淋巴细胞免疫表型分布调查，建立健康人外周血T淋巴细胞免疫表型正常参考值范围。方法选择浙江地区义务献血和健康体检者385例，血样用Multi TEST四色特异性T淋巴细胞亚群荧光抗体进行荧光标记，FACS Callibur流式细胞仪检测样品，Mulfiset程序获取数据并分析结果，SPSS 12．0软件包进行统计分析。以百分位数法，采用95％可信区间确定正常参考值范围。结果男性和女性的CD3^＋的百分率和CD3^＋CD4^＋百分率和绝对数均有差异，表现为女性高于男性。而CD3^＋绝对数和CD3^＋CD8^＋百分率和绝对数没有性别差异。T淋巴细胞免疫表型各个指标在不同年龄组之间均有差异，表现CD3^＋CD8^＋（相对数和绝对值）随年龄组增大而逐渐下降趋势，而CD3^＋CD4^＋（相对数和绝对值）则随年龄组增大而逐渐增加。浙江省健康人T淋巴细胞免疫表型参考值范围：CD3^＋百分数（％）：47．98～82．60；CD3^＋绝对数（个／μl）：712．49～2367．55；CD8^＋百分率（％）：14．24～41．48；CD8^＋绝对数（个／μl）：219．14～1109．81；CD4^＋百分率（％）：24．15～51．66；CD4^＋绝对数（个／μl）：383．61～1345．60；CD4／CD8：0．70～3．25。结论健康人淋巴细胞免疫表型的分布存在性别和年龄差别。由于这种差别细微，可以在同一种族同一区域建立统一的正常参考值范围。     

Total Duration of Breastfeeding,Vitamin D Supplementation,and Serum Levels of 25-Hydroxyvitamin D

Objectives. To determine the association between total breastfeeding duration and serum 25-hydroxyvitamin D (25-OHD) and to explore whether vitamin D supplementation influences this association.Methods. We conducted a cross-sectional study of healthy children between September 2011 and August 2013 through the TARGet Kids! primary health care research network. Of the 4533 eligible children, we included only the 2508 who had 25-OHD measured. We assessed adjusted associations of total breastfeeding duration (in months) with serum 25-OHD and in supplemented versus nonsupplemented children, with the odds of 25-OHD less than 20 nanograms per milliliter.Results. Each 1-month increase in total breastfeeding duration was associated with a 0.12 nanograms per milliliter lower median serum 25-OHD (95% confidence interval [CI] = –0.21 ng/mL, –0.02 ng/mL) among children who were not supplemented. The odds of serum 25-OHD less than 20 nanograms per milliliter increased by 6% (odds ratio [OR] = 1.06; 95% CI = 1.03, 1.10) for every 1-month increase in total breastfeeding duration among nonsupplemented children. The interaction between vitamin D supplementation, duration of breastfeeding, and median serum 25-OHD was statistically significant (P = .04).Conclusions. Breastfed children who were not supplemented, particularly those breastfed more than 1 year, appear to have lower vitamin D status. Vitamin D supplementation may mitigate this risk. These findings support recommendations for supplementation during breastfeeding of any duration.Vitamin D is a fat-soluble steroid that has numerous biological actions that affect health.1–4 In infants and young children, very low vitamin D intake can lead to rickets.5–8 Exclusively breastfed infants who are not supplemented with vitamin D are at increased risk for developing rickets because of the limited transfer of vitamin D in breast milk.9,10 Although previous research supports the association between exclusive breastfeeding and low serum vitamin D levels in children,11,12 little is known about the effect of total duration of breastfeeding, including the period of nonexclusive breastfeeding, on vitamin D status.Guidelines for vitamin D supplementation during breastfeeding beyond the first year of life vary throughout the world. The American Academy of Pediatrics recommends, “Any breastfeeding infant, regardless of whether he or she is being supplemented with formula, should be supplemented with 400 IU of vitamin D.”10^(p1146) The Committee on Nutrition of the French Society of Pediatrics also suggests continuous vitamin D supplementation beyond the first year of life,13 irrespective of breastfeeding status, and the Canadian Pediatric Society recommends, “400 IU/day for all infants during the first year.”14 An improved understanding of the relationship between breastfeeding beyond the first year of life, vitamin D supplementation, and vitamin D stores may assist with reducing variation in professional recommendations, current practice, and optimizing vitamin D status during breastfeeding beyond the first year.We examined whether total duration of breastfeeding is associated with infant serum 25-hydroxyvitamin D (25-OHD) concentration in a cohort of healthy urban North American children. Our secondary objective was to explore how vitamin D supplementation influences the relationship between total duration of breastfeeding and 25-OHD.     

创伤患者T细胞亚群的变化及意义（综述）

本文简要地综述了T淋巴细胞亚群的分类及功能,并着重阐述机体在经受创伤后CD3＋、CD4＋、CD8＋、CD25＋各T细胞亚群及CD4＋/CD8＋值的变化及意义,总结出创伤后患者出现免疫功能抑制状态的结论。     

Association Between Serum Vitamin D and Metabolic Risk Factors in Korean Schoolgirls

Objectives

Vitamin D, a key regulator of bone metabolism, has been recently been linked with energy homeostasis and metabolic disorders in western countries. However, few studies have focused on the association of vitamin D with metabolic risk factors among Asian children. We studied the prevalence of vitamin D insufficiency and the association of 25-hydroxyvitamin D [25(OH)D] with metabolic risk factors in Korean schoolgirls.

Methods

The sample consisted of 320 13-year-old girls recruited from two middle schools in the city of Gwacheon, Korea (latitude 37°N), in July 2011. Anthropometric and blood biochemistry data were obtained for this cross-sectional observational study. We also obtained lifestyle data from questionnaires and dietary data from 3-day food diaries.

Results

Vitamin D deficiency [25(OH)D < 20 ng/mL] was noted in 63.8% of participants. The mean 25(OH)D level was not significantly lower in the overweight group. Level of physical activity and vitamin D intake did not significantly affect 25(OH)D. However, 25(OH)D levels were positively correlated with milk intake and negatively correlated with soft drink intake. Serum 25(OH)D had a negative relationship with fasting glucose and insulin resistance index (homeostasis model assessment-insulin resistance; HOMA-IR) after adjustment for physical activity and body mass index z score (r = −0.144, p = 0.015), and with metabolic risk score similarly (r = −0.141, p = 0.012). Levels of insulin, HOMA-IR, and systolic blood pressure were higher in girls with deficient 25(OH)D levels than in those with sufficient levels.

Conclusion

We found that low 25(OH)D levels were associated with higher blood glucose and insulin resistance. Korean girls with low 25(OH)D levels could be at increased risk for metabolic disorders.     

Vitamin D Binding Protein and Vitamin D Levels in Multi-Ethnic Population

Introduction

Low levels of 25-hydroxyvitamin D (25(OH)D) has been associated with many negative health outcomes including falls and fractures. 25(OH)D is largely bound to vitamin D binding protein (VDBP). There is increasing evidence that free or bioavailable 25(OH)D may be a better measure of vitamin D deficiency.

Objective

To determine the prevalence of 25(OH)D deficiency and VDBP levels in multi-ethnic population, and its impact on muscle strength.

Design and methods

Cross-sectional study of older adults in Western region of Singapore. 295 participants from three ethnic groups were selected from the Healthy Older People Everyday (HOPE) cohort for measurements of total 25(OH)D and VDBP levels. Total 25(OH)D, VDBP, frailty status, Timed-Up-and-Go (TUG) and grip strength (GS) were assessed. Albumin, free and bioavailable 25(OH)D were only available for 256 participants.

Results

53% of Malay and 55% of Indians were deficient in 25(OH)D compared with 18.2% of ethnic Chinese participants. Chinese also had higher total 25(OH)D concentrations with a mean of 29.1 ug/l, (p = <0.001). Chinese had the lowest level of VDBP (169.6ug/ml) followed by Malay (188.8 ug/ml) and Indian having the highest (220.1 ug/ml). Calculated bioavailable and free 25(OH)D levels were significantly higher in Chinese, followed by Malays and Indians, which also correlated with better grip strength measures amongst the Chinese.

Conclusion

The Malays and Indians had overall lower free, bioavailable and total 25(OH)D compared with ethnic Chinese. Chinese ethnic group also had the lowest VDBP and better overall grip strength.

     

Serum Vitamin D Levels and Polycystic Ovary syndrome: A Systematic Review and Meta-Analysis

Vitamin D deficiency (VDD) is common in women with and without polycystic ovary syndrome (PCOS) and may be associated with metabolic and endocrine disorders in PCOS. The aim of this meta-analysis is to assess the associations of serum vitamin D levels with metabolic and endocrine dysregulations in women with PCOS, and to determine effects of vitamin D supplementation on metabolic and hormonal functions in PCOS patients. The literature search was undertaken through five databases until 16 January 2015 for both observational and experimental studies concerning relationships between vitamin D and PCOS. A total of 366 citations were identified, of which 30 were selected (n = 3182). We found that lower serum vitamin D levels were related to metabolic and hormonal disorders in women with PCOS. Specifically, PCOS patients with VDD were more likely to have dysglycemia (e.g., increased levels of fasting glucose and homeostatic model assessment-insulin resistance index (HOMA-IR)) compared to those without VDD. This meta-analysis found no evidence that vitamin D supplementation reduced or mitigated metabolic and hormonal dysregulations in PCOS. VDD may be a comorbid manifestation of PCOS or a minor pathway in PCOS associated metabolic and hormonal dysregulation. Future prospective observational studies and randomized controlled trials with repeated VDD assessment and better characterization of PCOS disease severity at enrollment are needed to clarify whether VDD is a co-determinant of hormonal and metabolic dysregulations in PCOS, represents a consequence of hormonal and metabolic dysregulations in PCOS or both.