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促甲狀腺素與心血管病危險因素相關性研究進展

2015-04-03 12:59邢萬佳姜兆順
實用醫藥雜志 2015年11期
關鍵詞:心血管病血脂血壓

邢萬佳,姜兆順

促甲狀腺素與心血管病危險因素相關性研究進展

邢萬佳,姜兆順*

[摘要]隨著對亞臨床甲狀腺功能減退的認識及促甲狀腺素受體在甲狀腺外分布的發現,研究者們開始關注促甲狀腺素的甲狀腺外效應及其水平改變的臨床意義。筆者回顧性分析了近年關于亞臨床甲狀腺功能減退及促甲狀腺素水平與血壓、血脂譜、體重指數、代謝綜合征等心血管疾病危險因素相關性的研究,結果提示促甲狀腺素在正常范圍內的高水平時,與高血壓、脂代謝異常、肥胖、代謝綜合征乃至因心血管死亡仍可能存在相關性。

[關鍵詞]促甲狀腺激素;血脂;血壓;亞臨床甲狀腺機能減低;心血管病

心血管系統是甲狀腺激素 (thyroid hormone,TH)的主要靶器官之一,因此甲狀腺功能異常與心血管病變(cardiovascular disease,CVD)密切相關[1]。臨床上甲狀腺功能減退被視為CVD的重要危險因素之一[2],關于其與動脈粥樣硬化之間的相關性已得到共識[3],其主要機制在于TH水平異常。關于以TH水平正常、TSH異常升高為特征的亞臨床甲狀腺功能減退(subclinical hypothyroidism,SCH)與CVD之間是否存在相關性目前尚存在爭議[4-7]。有研究顯示,大多數CVD發生于甲狀腺功能正常個體,在血管病變的患者中,正常較高的TSH水平與心肌梗死危險性增加相關[8]。在肥大型心肌病患者中的研究亦提示[9],TSH在正常高水平的患者左心室舒張功能障礙更為嚴重。但也有研究結論與之相左[10,11],甚至有研究提示在CVD患者中,高的TSH水平與降低的全因及心血管死亡率相關[12]。

TSH的傳統功能被認為是與表達于甲狀腺濾泡細胞膜上的特異性受體TSHR結合而實現的。自發現TSHR mRNA在人眼球后組織中存在表達[13]以來,諸多研究提示,TSHR可廣泛表達于甲狀腺外組織中,包括心肌細胞[14]與脂肪細胞[15]。 不僅在甲狀腺外表達廣泛,而且相當多的研究顯示,在不同的甲狀腺外組織中存在TSH-TSHR相互作用。例如,TSHR在肝細胞具備功能性表達[16],且參與了脂肪細胞的生理調控[17]。迄今為止,關于TSH的甲狀腺外作用尚存在爭議,筆者主要就TSH水平與CVD危險因素的相關性研究進展進行綜述回顧。

1 TSH與血壓

甲狀腺功能亢進與甲狀腺功能減退均與高血壓相關,但SCH是否與升高的血壓(BP)相關并無定論[18,19]。一項基于社區人群的研究[20]顯示,與甲狀腺功能正常者相比,SCH患者的收縮壓(SBP)與舒張壓(DBP)并無顯著差異。部分研究[19,21,22]得到相似結果。但也有研究報道SCH患者SBP與DBP均較甲狀腺功能正常者顯著升高,校正了其他CVD危險因素后,僅SBP與SCH顯著相關[23]。因此,SCH可能與高血壓風險相關[18],針對SCH適當治療將TSH水平降低后或可改善BP,從而對CVD的預防與治療發揮遠期效應。

目前尚不知TSH在正常范圍內的細微變化是否對BP產生影響。在甲狀腺功能正常的女性中[24],與TSH位于下四分位數(0.5~1.31 mIU/L)者相比,TSH水平在上四分位數(2.61~4.49 mIU/L)者SBP顯著升高,TSH每增加 1 mIU/L,相應 SBP增加1.53 mmHg。后續研究亦支持上述結果[25,26]。在兒童與青春期少年中的研究也提示,高的血漿TSH水平與SBP及DBP呈正相關[18]。與之相似,在原發性高血壓患者中,有報道TSH水平與SBP及DBP呈線性正相關[27]。此外,學齡兒童中,在正常范圍內TSH水平的增加與BP增高相關,在男孩中尤為明顯[28]。最新的一項研究亦提示TSH水平與高血壓呈正相關關系[29]。

TSH與BP相關的確切機制不明。有研究者發現TSH水平在正常上限(2.1~4.0 mIU/L)的女性血管反應性出現異常[30],提示TSH或可通過損害血管功能對血壓產生影響。此外,應考慮到遺傳因素對BP及TSH水平的影響。一項針對高血壓家族的研究[31]提示,家族成員聚集性呈現正常高水平的TSH (2.0~5.0 mIU/L)。與對照相比,原發性高血壓動物模型——自發性高血壓大鼠亦表現為TSH水平升高[32]。近期研究[33]提示,血清TSH水平與動脈壓及高血壓呈橫斷面正相關,其中與高血壓相關的OR 為1.76(95%CI=1.24~2.50,P=0.002),但TSH與為期5年的血壓變化之間并無相關性。因此,TSH與血壓之間的關系有待進一步研究闡明。

2 TSH與血脂譜

與甲狀腺功能正常者相比,SCH患者血脂譜是否變化存在爭議[5,34,35]。部分研究提示,SCH患者三酰甘油(TG)顯著升高[36],而高密度脂蛋白膽固醇(HDL-C)顯著降低[37]。最新研究提示,SCH中TSH水平與脂蛋白(a)、低密度脂蛋白膽固醇(LDL-C)及總膽固醇(TC)呈顯著正相關[38]。

關于在正常參考值范圍內TSH水平與血脂譜之間相關性的研究尚無定論。將TSH正常參考值范圍定義為0.3~4.8 mIU/L時,研究發現,在不同TSH水平區間 TG及 HDL-C水平均無顯著差異[39]。Westerink等[40]也報道了相似結果。然而,在Hunt研究[41]中,以0.5~3.5 mIU/L作為正常TSH參考范圍,結果提示,隨著TSH水平在正常范圍內升高,TC、LDL-C及非HDL-C均與TSH呈顯著線性正相關,而HDL-C與TSH呈線性負相關。另一項針對印度女性的研究發現,TSH位于正常參考值范圍上限時 (TSH>2.1 μU/ml),其水平與較高的TC、TG、LDL-C及較低的HDL-C水平相關[29]。來自意大利的一項納入490例無甲狀腺病變且血糖控制基本滿意的2型糖尿病患者的研究發現,將其正常參考值范圍內的TSH水平分組后,TSH在正常最高組(1.91~4.00 mIU/L)者,TG明顯高于TSH在正常最低組(0.28~0.90 mIU/L)[(163.8±102.9)mg/dl vs (128.3±65.5)mg/dl,P=0.002)[42]。有學者推測,即便在正常參考值范圍內,TSH可以通過上調肝羥甲基戊二酰輔酶A還原酶促進膽固醇合成,導致增高的TSH與不利的血脂譜之間呈現相關性[43]。因此,TSH可能對心血管健康具有長期的不利影響。同時,應當注意的是,目前所有關于TSH水平與血脂譜之間的相關性研究均呈現較弱或中等相關,其臨床意義有待進一步闡明。

3 TSH與體重

超重與肥胖是CVD的重要危險因素。鑒于TSHR可在脂肪細胞中表達[17,44,45],有關TSH在脂肪細胞分化及體重(BW)方面的作用受到關注。對比野生型對照及TSHR基因敲除小鼠,發現兩者脂肪細胞平均大小存在顯著差異[17],而來自甲狀腺功能正常者的研究[46]并未發現TSH水平與體重指數(BMI)之間存在相關性(P=0.29)。與之相反,另一項基于人群的研究[47]提示,在正常參考值范圍內的TSH水平與BMI正相關,經校正年齡與吸煙因素后,女性TSH水平每升高1 mIU/L,BMI增加0.41 kg/ m2,男性相應BMI增幅為0.48 kg/m2。針對中國人的研究亦顯示,TSH在0.3~4.8mIU/L的正常參考值范圍內與BMI呈正相關關系 (β coefficient=0.921,P= 0.022)[39]。一項在甲狀腺功能正常女性中的研究[29]亦發現,與TSH低于中位數者相比,TSH超過中位數(>2.1 μU/ml)的個體更加肥胖。Giandalia等[42]對TSH在正常范圍內的2型糖尿病患者的研究亦提示高水平TSH組患者具有更高的BMI。導致上述相關性的確切機制尚不清楚,在喂食誘導的肥胖小鼠及具有較高BMI的人群中,脂肪組織中TSHR表達增加[48]。因此,推測在特定條件下TSHR表達的調控異常,可能通過過多的脂肪生成參與了肥胖的發生。究竟TSHR在脂肪細胞中的表達是否增加及其作用是如何發揮尚有待闡明。

一項為期3.5年前瞻性研究發現,盡管基線TSH水平與BW變化無相關性,但無論男性還是女性,隨訪中TSH水平的增高與BW增加呈正相關[49]。后續一項長達10.5年、基于人群的隨訪研究也得到了相似結論[50]。因此,提示TSH在正常范圍內的中等程度升高可能與體重增加相關。但來自德國的臨床觀察[51]發現,盡管肥胖的女孩TSH水平更高,但減重5%后TSH水平降低,故認為TSH在肥胖個體中的升高似乎是肥胖的結果而非導致肥胖的原因。另有學者推測,TSH水平升高可能是針對BW增加的適應性反應[52]。此外,其他因素,諸如未診斷的SCH,下丘腦-垂體功能異?;騎SH抵抗均應在分析TSH與BW的相關性時加以考慮[53]。

4 TSH與代謝綜合征

代謝綜合征(metabolic syndrome,MS)是肥胖、血脂異常、胰島素抵抗、高血糖、高血壓等諸多代謝異常在個體的聚集,同時也是CVD發生與進展的重要危險因素。盡管SCH亦被認為是MS發生的危險因素之一[54,55],TSH水平與MS是否相關仍存疑。來自甲狀腺功能正常的絕經后女性的研究顯示[56],TSH水平與MS危險性相關 (OR=1.55,P<0.001)。Boggio等[29]的研究也觀察到類似結果。另一項在甲狀腺功能正常的韓國女性中的前瞻性研究[57]顯示,在基線時經校正后的TSH水平與血清胰島素及HOMA胰島素抵抗指數(HOMA-IR)的相關性并不顯著,但隨訪3年后,顯示經校正后的高水平的TSH與胰島素水平變化及HOMA-IR的變化顯著相關(β分別為0.166及0.164,P均為0.008)。進一步的logistic回歸分析提示,MS與增加的TSH水平相關(OR=1.103,P=0.041),故提示在韓國女性中高水平TSH可能預示MS的發生。

5 TSH與CVD事件

盡管部分小規模臨床研究支持SCH與增加的CVD風險相關[4,58],一項在老年人群的研究卻顯示,亞臨床甲狀腺功能異常與增加的全因死亡或心血管病死亡無相關性[59]。大規模的前瞻性隊列研究均顯示,SCH與老年患者的心力衰竭發生及進展相關,但關于SCH與冠心?。–HD)發生及死亡的關系僅見于年齡低于65歲患者[60]。TSH水平與CVD事件是否相關尚無定論[5,12],部分研究甚至認為,高水平的TSH與全因死亡及心血管死亡呈顯著負相關關系(校正后的OR分別為0.47及0.33,P<0.01 及0.05)[12]。研究者認為,在高水平TSH個體中相對低的全因及心血管病死亡可能與低代謝水平有關,此種代謝水平降低的作用超過了因血脂異常導致的動脈粥樣硬化危險,而在較低TSH水平組觀察到的相對較低的死亡率可能與甲狀腺功能亢進相關的抗動脈粥樣硬化作用相關。一項meta分析[61]顯示,CHD事件與CHD死亡率均隨TSH水平增加而升高,TSH水平在4.5~6.9 mIU/L、7.0~9.9 mIU/ L及 10~19.9 mIU/L三組的CHD死亡相對危險(HR)分別為1.09、1.42及1.58。因此,該研究認為SCH是與增加的CHD事件及CHD死亡風險相關,在TSH水平超過10 mIU/L,上述相關性更為顯著。

TSH在正常參考值范圍內與CVD事件相關性的研究較少,一項臨床血管病變患者中的前瞻性隊列研究[8]發現,盡管TSH與中風或全因死亡風險無相關性,但TSH在正常范圍內每升高1單位,心肌梗死的風險提高33%。上述相關性在非內臟型肥胖患者中更為顯著。在著名的HUNT研究中[62],同樣提示女性中正常范圍內TSH水平與CVD死亡率存在線性正相關關系。

6 展 望

鑒于TSHR在甲狀腺外組織的廣泛表達,研究者推測TSH可能參與了大量的機體功能調控。大量證據顯示,在正常范圍內或輕度升高的TSH水平與CVD危險因素之間存在可能的相關性,但仍面臨相當多的挑戰。例如,由于循環中TSH與THs間存在相互作用,研究中很難區分TSH的效應或THs波動的作用,從而對臨床結果的分析造成困擾[63]。此外,由于TSH的正常參考范圍在不同種族、年齡均存在差異[64],臨床難以設定適合的TSH正常參考范圍,需要更多的深入研究,進一步闡明TSH與CVD危險因子之間的相關性,從而為臨床干預提供依據。

【參考文獻】

[1]Klein I,Ojamaa K.Thyroid hormone and the cardiovascular system[J].N Engl J Med,2001,344(7):501-509.

[2]Neves C,Alves M,Medina JL,et al.Thyroid diseases,dyslipidemia and cardiovascular pathology[J].Rev Port Cardiol,2008,27(10):1211-1236.

[3]Cappola AR,Ladenson PW.Hypothyroidism and atherosclerosis [J].J Clin Endocrinol Metab,2003,88(6):2438-2444.

[4]Rodondi N,Newman AB,Vittinghoff E,et al.Subclinical hypothyroidism and the risk of heart failure,other cardiovascular events,and death[J].Arch Intern Med,2005,165(21):2460-2466.

[5]Fiarresga AJ,Feliciano J,Fernandes R,et al.Relationship between coronary disease and subclinical hypothyroidism:an angiographic study[J].Rev Port Cardiol,2009,28(5):535-543.

[6]Schultz M,Kistorp C,Raymond I,et al.Cardiovascular events in thyroid disease:a population based,prospective study[J].Horm Metab Res,2011,43(9):653-659.

[7]Vaya A,Gimenez C,Sarnago A,et al.Subclinical hypothyroidism and cardiovascular risk[J].Clin Hemorheol Microcirc,2014,58 (1):1-7.

[8]Westerink J,van der Graaf Y,Faber DR,et al.Relation between thyroid-stimulating hormone and the occurrence of cardiovascular events and mortality in patients with manifest vascular diseases [J].Eur J Prev Cardiol,2012,19(4):864-873.

[9]Chen S,Yuan J,Qiao S,et al.A high-normal thyrotropin levelis associated with the severity of left ventricular diastolic dysfunction in patients with hypertrophic cardiomyopathy[J].Kardiol Pol,2013,71(2):143-151.

[10]de Jongh RT,Lips P,van Schoor NM,et al.Endogenous subclinical thyroid disorders,physical and cognitive function,depression,and mortality in older individuals[J].Eur J Endocrinol,2011,165(4):545-554.

[11]Nanchen D,Gussekloo J,Westendorp RG,et al.Subclinical thyroid dysfunction and the risk of heart failure in older persons at high cardiovascular risk[J].J Clin Endocrinol Metab,2012,97(3):852-861.

[12]Volzke H,Menzel D,Henzler J,et al.Serum thyrotropin levels predict all-cause and circulatory mortality in patients with invasively treated coronary artery disease[J].Int J Cardiol,2009,133(3):407-410.

[13]Feliciello A,Porcellini A,Ciullo I,et al.Expression of thyrotropin-receptor mRNA in healthy and Graves'disease retroorbital tissue[J].Lancet,1993,342(8867):337-338.

[14]Drvota V,Janson A,Norman C,et al.Evidence for the presence of functional thyrotropin receptor in cardiac muscle[J].Biochem Biophys Res Commun,1995,211(2):426-431.

[15]Nannipieri M,Cecchetti F,Anselmino M,et al.Expression of thyrotropin and thyroid hormone receptors in adipose tissue of patients with morbid obesity and/or type 2 diabetes:effects of weight loss[J].Int J Obes(Lond),2009,33(9):1001-1006.

[16]Zhang W,Tian LM,Han Y,et al.Presence of thyrotropin receptor in hepatocytes:not a case of illegitimate transcription[J]. J Cell Mol Med,2009,13(11/12):4636-4642.

[17]Elgadi A,Zemack H,Marcus C,et al.Tissue-specific knockout of TSHr in white adipose tissue increases adipocyte size and decreases TSH-induced lipolysis[J].Biochem Biophys Res Commun,2010,393(3):526-530.

[18]Ittermann T,Thamm M,Wallaschofski H,et al.Serum Thyroid-Stimulating Hormone Levels Are Associated with Blood Pressure in Children and Adolescents[J].J Clin Endocrinol Metab,2012,97(3):828-834.

[19]Valentina VN,Marijan B,Chedo D,et al.Subclinical hypothyroidism and risk to carotid atherosclerosis[J].Arq Bras Endocrinol Metabol,2011,55(7):475-480.

[20]Liu D,Jiang F,Shan Z,et al.A cross-sectional survey of relationship between serum TSH level and blood pressure[J].J Hum Hypertens,2010,24(2):134-138.

[21]Takashima N,Niwa Y,Mannami T,et al.Characterization of subclinical thyroid dysfunction from cardiovascular and metabolic viewpoints:the Suita study[J].Circ J,2007,71(2):191-195.

[22]Duan Y,Peng W,Wang X,et al.Community-based study of the association of subclinical thyroid dysfunction with blood pressure[J].Endocrine,2009,35(2):136-142.

[23]Razvi S,Weaver JU,Vanderpump MP,et al.The incidence of ischemic heart disease and mortality in people with subclinical hypothyroidism:reanalysis of the Whickham Survey cohort[J]. J Clin Endocrinol Metab,2010,95(4):1734-1740.

[24]Waterhouse DF,McLaughlin AM,Walsh CD,et al.An examination of the relationship between normal range thyrotropin and cardiovascular risk parameters:a study in healthy women[J]. Thyroid,2007,17(3):243-248.

[25]Saltiki K,Voidonikola P,Stamatelopoulos K.Association of thyroid function with arterial pressure in normotensive and hypertensive euthyroid individuals:A cross-sectional study[J].Thyroid Res,2008,1(1):3.

[26]Boekholdt SM,Titan SM,Wiersinga WM,et al.Initial thyroid status and cardiovascular risk factors:the EPIC-Norfolk prospective population study[J].Clin Endocrinol(Oxf),2010,72 (3):404-410.

[27]Turchi F,Ronconi V,di Tizio V,et al.Blood pressure,thyroidstimulating hormone,and thyroid disease prevalence in primary aldosteronism and essential hypertension[J].Am J Hypertens,2011,24(12):1274-1279.

[28]Chen H,Xi Q,Zhang H,et al.Investigation of thyroid function and blood pressure in school-aged subjects without overt thyroid disease[J].Endocrine,2012,41(1):122-129.

[29]Boggio A,Muzio F,Fiscella M,et al.Is thyroid-stimulating hormone within the normal reference range a risk factor for atherosclerosis in women?[J].Intern Emerg Med,2014,9(1):51-57.

[30]Dagre AG,Lekakis JP,Protogerou AD,et al.Abnormal endothelial function in female patients with hypothyroidism and borderline thyroid function[J].Int J Cardiol,2007,114(3):332-338.

[31]Gumieniak O,Hurwitz S,Perlstein TS,et al.Aggregation of high-normal thyroid-stimulating hormone in hypertensive families[J].J Clin Endocrinol Metab,2005,90(11):5985-5990.

[32]Garcia SI,Alvarez AL,Porto PI,et al.Antisense inhibition of thyrotropin-releasing hormone reduces arterial blood pressure in spontaneously hypertensive rats[J].Hypertension,2001,37 (2 Part 2):365-370.

[33]Ittermann T,Tiller D,Meisinger C,et al.High serum thyrotropin levels are associated with current but not with incident hypertension[J].Thyroid,2013,23(8):955-963.

[34]Teixeira Pde F,Reuters VS,Ferreira MM,et al.Lipid profile in different degrees of hypothyroidism and effects of levothyroxine replacement in mild thyroid failure[J].Transl Res,2008,151(4):224-231.

[35]Marwaha RK,Tandon N,Garg MK,et al.Dyslipidemia in subclinical hypothyroidism in an Indian population[J].Clin Biochem,2011,44(14/15):1214-1217.

[36]Toruner F,Altinova AE,Karakoc A,et al.Risk factors for cardiovascular disease in patients with subclinical hypothyroidism [J].Adv Ther,2008,25(5):430-437.

[37]Erdem TY,Ercan M,Ugurlu S,et al.Plasma viscosity,an early cardiovascular risk factor in women with subclinical hypothyroidism[J].Clin Hemorheol Microcirc,2008,38(4):219-225.

[38]Sharma R,Sharma TK,Kaushik GG,et al.Subclinical hypothyroidism and its association with cardiovascular risk factors[J]. Clin Lab,2011,57(9/10):719-724.

[39]Lai Y,Wang J,Jiang F,et al.The relationship between serum thyrotropin and components of metabolic syndrome[J].EndocrJ,2011,58(1):23-30.

[40]Westerink J,van der Graaf Y,Faber DR,et al.The relation between thyroid-stimulating hormone and measures of adiposity in patients with manifest vascular disease[J].Eur J Clin Invest,2011,41(2):159-166.

[41]Asvold BO,Vatten LJ,Nilsen TI,et al.The association between TSH within the reference range and serum lipid concentrations in a population-based study[J].Eur J Endocrinol,2007,156 (2):181-186.

[42]Giandalia A,Russo GT,Romeo EL,et al.Influence of highnormal serum TSH levels on major cardiovascular risk factors and Visceral Adiposity Index in euthyroid type 2 diabetic subjects[J].Endocrine,2014,47(1):152-160.

[43]Tian L,Song Y,Xing M,et al.A novel role for thyroid-stimulating hormone:up-regulation of hepatic 3-hydroxy-3-methylglutaryl-coenzyme A reductase expression through the cyclic adenosine monophosphate/protein kinase A/cyclic adenosine monophosphate-responsive element binding protein pathway[J]. Hepatology,2010,52(4):1401-1409.

[44]Lu M,Lin RY.TSH stimulates adipogenesis in mouse embryonic stem cells[J].J Endocrinol,2008,196(1):159-169.

[45]Endo T,Kobayashi T.Thyroid-stimulating hormone receptor in brown adipose tissue is involved in the regulation of thermogenesis[J].Am J Physiol Endocrinol Metab,2008,295(2):E514-518.

[46]Makepeace AE,Bremner AP,O'Leary P,et al.Significant inverse relationship between serum free T4 concentration and body mass index in euthyroid subjects:differences between smokers and nonsmokers[J].Clin Endocrinol(Oxf),2008,69(4):648-652.

[47]Asvold BO,Bjoro T,Vatten LJ.Association of serum TSH with high body mass differs between smokers and never-smokers[J]. J Clin Endocrinol Metab,2009,94(12):5023-5027.

[48]Lu S,Guan Q,Liu Y,et al.Role of extrathyroidal TSHR expression in adipocyte differentiation and its association with obesity[J].Lipids Health Dis,2012,11(1):17.

[49]Fox CS,Pencina MJ,D'Agostino RB,et al.Relations of thyroid function to body weight:cross-sectional and longitudinal observations in a community-based sample[J].Arch Intern Med,2008,168(6):587-592.

[50]Svare A,Nilsen TI,Bjoro T,et al.Serum TSH related to measures of body mass:longitudinal data from the HUNT Study,Norway[J].Clin Endocrinol(Oxf),2011,74(6):769-775.

[51]Reinehr T,Isa A,de Sousa G,et al.Thyroid hormones and their relation to weight status[J].Horm Res,2008,70(1):51-57.

[52]Panoulas VF,Ahmad N,Fazal AA,et al.The inter-operator variability in measuring waist circumference and its potential impact on the diagnosis of the metabolic syndrome[J].Postgrad Med J,2008,84(993):344-347.

[53]Reinehr T.Obesity and thyroid function[J].Mol Cell Endocrinol,2010,316(2):165-171.

[54]Roos A,Bakker SJ,Links TP,et al.Thyroid function is associated with components of the metabolic syndrome in euthyroid subjects[J].J Clin Endocrinol Metab,2007,92(2):491-496.

[55]Uzunlulu M,Yorulmaz E,Oguz A.Prevalence of subclinical hypothyroidism in patients with metabolic syndrome[J].Endocr J,2007,54(1):71-76.

[56]Park HT,Cho GJ,Ahn KH,et al.Thyroid stimulating hormone is associated with metabolic syndrome in euthyroid postmenopausal women[J].Maturitas,2009,62(3):301-305.

[57]Park SB,Choi HC,Joo NS.The relation of thyroid function to components of the metabolic syndrome in Korean men and women[J].J Korean Med Sci,2011,26(4):540-545.

[58]Cappola AR,Fried LP,Arnold AM,et al.Thyroid status,cardiovascular risk,and mortality in older adults[J].JAMA,2006,295(9):1033-1041.

[59]Waring AC,Harrison S,Samuels MH,et al.Thyroid function and mortality in older men:a prospective study[J].J Clin Endocrinol Metab,2012,97(3):862-870.

[60]Tognini S,Pasqualetti G,Calsolaro V,et al.Cardiovascular risk and quality of life in elderly people with mild thyroid hormone deficiency[J].Front Endocrinol,2014,5(2):153.

[61]Rodondi N,den Elzen WP,Bauer DC,et al.Subclinical hypothyroidism and the risk of coronary heart disease and mortality[J].JAMA,2010,304(12):1365-1374.

[62]Asvold BO,Bjoro T,Nilsen TI,et al.Thyrotropin levels and risk of fatal coronary heart disease:the HUNT study[J].Arch Intern Med,2008,168(8):855-860.

[63]Bassett JH,Williams GR.Critical role of the hypothalamicpituitary-thyroid axis in bone[J].Bone,2008,43(3):418-426.

[64]Boucai L,Surks MI.Reference limits of serum TSH and free T4 are significantly influenced by race and age in an urban outpatient medical practice[J].Clin Endocrinol(Oxf),2009,70(5):788-793.

[2015-05-14收稿,2015-06-13修回][本文編輯:王軍紅]

[中圖分類號]R575+.14

[文獻標志碼]A

[作者單位]250031山東濟南,濟南軍區總醫院內分泌科(邢萬佳,姜兆順)

[通訊作者]姜兆順,Email:jzs012@163.com

Current insight into the associations between thyrotropin and cardiovascular risk factors

XING Wanjia,JIANG Zhao-shun.Department of Endocrinology,the General Hospital of Jinan Military Command,Jinan,Shandong 250031,China

[Abstract]With the recoginition of subclinical hypothyroidism which is characterized by abnormal high thyrotropin(TSH)levels and the wide extra-thyroidal expression of thyrotropin receptor,the clinical implications of TSH outside thyroid gland had aroused great attention.Even within the normal range,TSH might perticipate in the regulation of lipid profiles,blood pressure,body weight and other factors associated with cardiovascular diseases,although the detailed mechanisms remain unclear.TSH might be involved in a wide array of extrathyroidal regulatory mechanisms.There was a possible association between normal or slightly elevated TSH levels and CVD risk factors.

[Key words]Thyroid-stimulating hormone;Blood lipid;Blood pressure;Subclinical hypothyroidism;Cardiovascular disease

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