李君玲 馬雪玲 李玉波 夏愷 王田 薛曉興 趙慧輝 王偉
摘要 目的:研究抑郁癥肝郁脾虛證大鼠中樞分子生物學基礎。方法:慢性不可預知溫和應激方法對大鼠進行造模,磁共振功能成像技術掃描大鼠全腦信息,利用SPM8軟件計算出抑郁癥肝郁脾虛證大鼠與正常組比較在低頻震蕩(Amplitude of the Low-frequency Fluctuations,ALFF)和局部一致性(Regional Homogeneity,ReHo)中存在異常的腦區;高效液相色譜法對所探索的密切相關腦區進行單胺類神經遞質檢測;四逆散方劑反證確定其中樞分子生物學基礎。結果:模型大鼠下丘腦Reho與ALFF均減弱,下丘腦DA、5-HT、5-HIAA和NE含量明顯降低,差異有統計學意義(P<0.05),四逆散組較模型組比較下丘腦5-HT含量顯著升高(P<0.05),NE、DA、5-HIAA存在升高趨勢,差異有統計學意義(P>0.05)。結論:下丘腦5-HT、5-HIAA、NE、DA是肝郁脾虛型抑郁癥的分子生物學基礎之一。
關鍵詞 肝郁脾虛;抑郁癥;生物學基礎;功能核磁
Abstract Objective:To explore the central molecular biological basis of depression with stagnation of liver qi and spleen deficiency syndrome in rats.Methods:The chronic unpredictable mild stress (CUMS) method was used to establish the model.Rat′s brain information was scanned with functional magnetic resonance imaging (fMRI).The amplitude of the low-frequency fluctuations (ALFF) and the abnormal brain region in regional homogeneity (Reho) of rats in normal group and depression with stagnation of liver qi and spleen deficiency syndrome group were calculated and analyzed by SPM8.High performance liquid chromatography(HPLC)was used to detect the monoamine neurotransmitter change of the close related brain region.Sini Powder was used to confirm the biological basis from the perspective of counterevidence.Results:Both ALFF and Reho in the hypothalamus were decreased.The contents of dopamine (DA),serotonin (5-HT),and 5 hydroxyindole acetic acid (5-HIAA) and norepinephrine (NE) were reduced significantly (P<0.05).The content of 5-HT of Sini Powder group increased more significantly than that of normal group (P<0.05).There was improvement tendency in the DA,5-HIAA,and NE (P>0.05).Conclusion:The 5-HT,5-HIAA,NE,DA in the hypothalamus were parts of the central biological basis of depression with stagnation of liver qi and spleen deficiency syndrome.
Key Words Depression with stagnation of liver qi and spleen deficiency syndrome; Depression; Biological basis; Functional magnetic resonance imaging
中圖分類號:R285.6;R749.4+1文獻標識碼:Adoi:10.3969/j.issn.1673-7202.2018.09.008
抑郁癥是以情緒低落、思維遲緩、意志活動減退為主要特征的綜合征[1]。根據世界衛生組織(World Health Organization,WHO)公布的資料顯示,抑郁癥是全球范圍內引起致殘率的第3大疾病,并將于2030年成為最大疾病負擔源[2]。然而,目前臨床中僅有<50%的患者對現代的一線抗抑郁藥有良性反應,<30%的患者能夠得到痊愈[3]。因此,尋找更多有效的治療手段已成為目前的研究熱點。中醫學是祖國傳統文化的寶庫,從中醫學中挖掘抑郁癥的解決方法越來越受到學者們的關注。然而,中醫臨床治療的核心是辨證論治[4],證候是中醫治療的基礎和前提,因此研究中醫對抑郁癥證候認識的生物學基礎是從中醫學中尋找抑郁癥解決辦法的根本途徑。肝郁脾虛證是中醫臨床治療抑郁癥的常見證型,中醫臨床治療肝郁脾虛型抑郁癥往往療效顯著[5-7],因此運用現代手段研究肝郁脾虛型抑郁癥的生物學基礎是從中醫學中尋找治療抑郁癥的重要途徑之一。
單胺類神經遞質是目前研究抑郁證發病機制較為常用的指標,然而,對于抑郁癥肝郁脾虛證的中樞生物學基礎,究竟選擇哪些腦區進行研究更有針對性,一直是研究者們所爭論和探討的。磁共振功能成像(Functional Magnetic Resonance Imaging,fMRI),是一種新型的、無創的、并且可動態進行檢測的技術,可以記錄靜息態大鼠的腦部功能,從全腦范圍內尋找模型動物的異常腦區,從而為系統的探索疾病發病相關的腦區提供了一種影像學方法。……