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飲食中添加精胺酸對敗血症時免疫黏著分子及器官中 飲食中添加精胺酸對敗血症時免疫黏著分子及器官中

myeloperoxidase

myeloperoxidase活性的影響 活性的影響

實驗目的

實驗目的::當敗血症發生時白血球會表現整合素當敗血症發生時白血球會表現整合素((integrinintegrin))並與血管內皮細胞上所呈現的細胞黏著並與血管內皮細胞上所呈現的細胞黏著 分子

分子(intracellular adhesion molecules, ICAM)(intracellular adhesion molecules, ICAM)相結合相結合,,而在血管壁上發生滾動、黏著並遷移至而在血管壁上發生滾動、黏著並遷移至 器官組織中發生去顆粒現象,組織受到過多的過氧化酵素如

器官組織中發生去顆粒現象,組織受到過多的過氧化酵素如myeloperoxidase(MPOmyeloperoxidase(MPO))及蛋白質水及蛋白質水 解酵素的作用後,會發展成多重器官衰竭致死。精胺酸

解酵素的作用後,會發展成多重器官衰竭致死。精胺酸((Arginine,ArgArginine,Arg))為一非必需之胺基酸為一非必需之胺基酸,,研究研究 顯示敗血症時血漿中之

顯示敗血症時血漿中之ArgArg濃度會下降,添加濃度會下降,添加Arg可提升血中Arg可提升血中ArgArg之濃度,減少重症病患之感染率之濃度,減少重症病患之感染率 及住院天數,並改善敗血症動物之存活率,故本實驗希望探討在飲食中添加

及住院天數,並改善敗血症動物之存活率,故本實驗希望探討在飲食中添加Arg對敗血症小鼠白Arg對敗血症小鼠白 血球上整合素

血球上整合素CD11a/CD18CD11a/CD18、CD11b/CD18CD11b/CD18、、細胞黏著分子及器官中細胞黏著分子及器官中MPO活性的影響。MPO活性的影響。

實驗方法實驗方法::

Control group:

Control group:餵食餵食semi purified semi purified 飲食飲食 Arg

Arg group:部分group:部分caseincasein由Arg取代的飲食Arg取代的飲食

00 適應期適應期 11 44

雄性雄性ICR miceICR mice

實驗結果 實驗結果 : :

Sepsis Sepsis 後2424小時犧牲老鼠小時犧牲老鼠 0,6,12及0,6,12

利用利用cecalcecal ligation ligation and and puncture(CLP) puncture(CLP)引 致敗血症致敗血症(sepsis)(sepsis)

Component Component (g/kg)

(g/kg) ControlControl ArgArg Soybean oil

Soybean oil 100100 100100 Casein

Casein 200200 158158

Arginine

Arginine 00 20.920.9

Salt mixture

Salt mixture 3535 3535 Vitamin

Vitamin mixture

mixture 1010 1010

Methy Methy cellulose

cellulose 3131 3131

Choline Choline chloride

chloride 11 11

Methionine

Methionine 33 33

Corn starch

Corn starch 620620 641.1641.1

結論:給予小鼠飲食中添加Arg對敗血症後白血球上的整合素CD11a/CD18及CD11b/CD18表現、

血中sICAM-1濃度及器官組織中MPO的活性均顯著較控制組高,顯示Arg添加使敗血症後白血球 與細胞之黏著增加,白血球在組織中浸潤更為嚴重。

Table 1.

Table 1. Composition of the experimental dietsComposition of the experimental diets

0 10 20 30 40 50

0h 6h 12h 24h

Arg control

0 5 1 0 1 5 2 0 2 5 3 0

0 h 6 h 1 2 h 2 4 h

Arg control

0 200 400 600 800 1000

0 6 12 24

a rg c ontrol

*

*

*

*

* * * *

(ng/ml)

(%)

(%)

LungLung LiverLiver

U/mgU/mg KidneyKidney protein

protein IntestinesIntestines 0h

0h

Control group Control group Arg

Arggroupgroup

0.53 0.53±±0.0810.081 0.52 0.52±±0.1190.119

0.54 0.54±±0.0430.043 0.53 0.53±±0.080.08 1.11 1.11±±0.2420.242 1.06±1.06±1.061.06

1.19±1.19±0.240.24 0.92±0.92±0.980.98

0.82±0.82±0.190.19 1.09 1.09±±1.121.12**

0.80 0.80±±0.110.11 0.64 0.64±±0.180.18

0.54 0.54±±0.090.09 0.53 0.53±±0.130.13 6h6h

Control group Control group Arg

Arggroupgroup 2.062.06±±1.041.04 1.78 1.78±±0.560.56

1.56 1.56±±0.490.49 1.15 1.15±±0.360.36

1.12 1.12±±0.110.11 1.06 1.06±±0.260.26 12h12h

Control group Control group

ArgArggroupgroup 2.852.85±±0.520.52

2.632.63±±0.320.32 2.1562.156±±0.490.49

2.412.41±±0.32 0.32 ** 1.19±1.19±0.140.14 0.92±0.92±0.130.13 24h

24h

Control group Control group

ArgArggroupgroup 0.930.93±±0.450.45

2.092.09±±0.79 0.79 ** 2.702.70±±0.470.47

1.931.93±±0.26 0.26 ** 0.82±0.82±0.030.03 1.09±1.09±0.07 0.07 ** Table 2. The activity of MPO in organs tissue during sepsis

Table 2. The activity of MPO in organs tissue during sepsis

*: significantly different from correspondent group in the same time point

Fig. 1 The expression of lymphocyte CD11a/CD18 after CLP

Time after CLP (h) Time after CLP (h)

Fig. 2 The expression of neutrophil CD11b/CD18 after sepsis

Time after CLP (h)

Time after CLP (h) Time after CLP (h)Time after CLP (h)

Fig. 3 The concentration of sICAN-1 in circulation after CLP-induced sepsis

葉秋莉 葉松鈴 陳維昭

台北醫學大學藥學研究所 保健營養學系 國立台灣大學醫學院外科

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