Direct effects of ethanol on bone resorption and formation in vitro.

Direct effects of ethanol on bone resorption and formation in vitro.
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乙醇对体外骨吸收和形成的直接影响。

DOI:
10.1016/0003-9861(85)90169-9
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发表时间:
1985
影响因子:
3.9
通讯作者:
Lau,KH
Lau,KH
中科院分区:
生物学3区
文献类型:
--
作者:
Farley,JR;Fitzsimmons,R;Taylor,AK;Jorch,UM;Lau,KH

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体外研究表明,低浓度乙醇对骨形成和骨吸收有直接影响。0.03 ~ 0.3%(v / v)乙醇对鸡胚胎胫骨骨吸收有促进作用,在NaF和甲状旁腺激素存在下,0.2%乙醇对胫骨骨形成有抑制作用(P< 0.01)。乙醇对体外分离的骨细胞也有直接影响,增加cAMP和pge2的产生(P< 0.001),并以双相、时间和剂量依赖的方式影响细胞增殖。暴露24 h后,0.03%乙醇对骨细胞增殖有促进作用(P< 0.001), 0.3%乙醇有抑制作用(P< 0.01)。矛盾的是,有丝分裂剂量的乙醇阻止了另外两种有丝分裂原NaF和人类骨骼生长因子增加骨细胞增殖的作用(P< 0.001)。但是这些效应是如何产生的呢?一些观察结果表明,乙醇对体外骨组织的这些直接影响是由骨细胞膜流动性的变化介导的,(a)二甲亚砜、乙二醇和卵磷脂,它们的作用与乙醇一样,增加膜流动性,模拟乙醇对骨细胞增殖的影响。二甲亚砜也能模拟乙醇增加cAMP的作用(P< 0.001)。(b)胆固醇降低细胞膜流动性,与乙醇相反,增强了对人类骨骼生长因子的有丝分裂反应(P< 0.001)。(c)颅骨细胞与乙醇或胆固醇一起预孵育改变了膜结合酶碱性磷酸酶的原位反应动力学。综上所述,这些数据表明乙醇在体外对骨组织有直接影响,并表明这些影响可能是继发于骨细胞膜流动性的变化。
In vitro studies indicate that low concentrations of ethanol can have direct effects on bone formation and resorption. Bone resorption was increased when embryonic chick tibiae were exposed to ethanol at 0.03–0.3%(v v), and bone formation was inhibited when tibiae were exposed to 0.2% ethanol in the presence of NaF or parathyroid hormone (P< 0.01 for each). Ethanol also had direct effects on isolated bone cells in vitro, increasing both cAMP and PGE 2 production (P< 0.001 for each), and affecting cell proliferation in a biphasic, time-and dose-dependent manner. After 24 h of exposure, 0.03% ethanol increased bone cell proliferation (P< 0.001), but 0.3% ethanol was inhibitory (P< 0.01). Paradoxically, mitogenic doses of ethanol prevented the effects of two other mitogens, NaF and human skeletal growth factor, to increase bone cell proliferation (P< 0.001). But how were these effects produced? Several observations suggest that these direct effects of ethanol on skeletal tissues in vitro were mediated by changes in bone cell membrane fluidity,(a) Dimethyl sulfoxide, ethylene glycol, and lecithin, which act, like ethanol, to increase membrane fluidity, mimicked the effects of ethanol on bone cell proliferation. Dimethyl sulfoxide also mimicked the effect of ethanol to increase cAMP (P< 0.001).(b) Cholesterol, which decreases cell membrane fluidity, acted oppositely to ethanol and enhanced the mitogenic response to human skeletal growth factor (P< 0.001).(c) Preincubation of calvarial cells with ethanol or with cholesterol altered the in situ reaction kinetics of the membrane-bound enzyme, alkaline phosphatase. Together, these data demonstrate that ethanol has direct effects on skeletal tissue in vitro, and suggest that those effects may be secondary to changes in bone cell membrane fluidity.
磷脂对提取物、原位和循环中骨骼碱性磷酸酶活性的不同影响。
DOI: --
发表时间: 1983
影响因子: 3.9
作者:
J. Farley;U. Jorch
通讯作者: U. Jorch
通过喂食含乙醇的流质饮食刺激离体大鼠肠粘膜细胞中胸苷的掺入。
DOI: 10.1159/000198711
发表时间: 1982
期刊: Digestion
影响因子: 3.2
作者:
H. Seitz;P. Czygan;B. Kommerell
通讯作者: B. Kommerell
从人骨中纯化骨骼生长因子。
DOI: 10.1021/bi00257a037
发表时间: 1982
期刊: Biochemistry
影响因子: 2.9
作者:
Farley,JR;Baylink,DJ
通讯作者: Baylink,DJ
DOI: 10.1111/j.1600-0773.1980.tb02026.x
发表时间: 2009
期刊: Acta pharmacologica et toxicologica
影响因子: --
作者:
S. Hynie;F. Lanefelt;B. Fredholm
通讯作者: B. Fredholm
使用培养的甲状腺细胞进行人甲状腺刺激剂的新体外测定:氯化钠对腺苷 3,5-单磷酸增加的影响。
DOI: 10.1210/jcem-54-1-108
发表时间: 1982
期刊: The Journal of clinical endocrinology and metabolism
影响因子: --
作者:
K. Kasagi;J. Konishi;Y. Iida;K. Ikekubo;T. Mori;K. Kuma;K. Torizuka
通讯作者: K. Torizuka