潘小蘭 牙政闖 王彩冰 黎飛彤 方高根 楊想
【摘要】 目的 探討地塞米松對(duì)小鼠血壓和心率的影響,尋找制備動(dòng)物高血壓模型的藥物。
方法 取KM小鼠40只隨機(jī)分為正常對(duì)照組(給予0.9% NaCl注射液)和地塞米松低、中、高濃度組(分別給予1.25 mg/kg、2.5 mg/kg、5.0 mg/kg地塞米松注射液),肌肉注射每天一次(用量按小鼠體重10 mL/kg計(jì)算),連續(xù)14天。各組小鼠在末次用藥后20 min測(cè)定收縮壓、舒張壓和心率。
結(jié)果 正常對(duì)照組和地塞米松低濃度組的實(shí)驗(yàn)后收縮壓、舒張壓、心率與實(shí)驗(yàn)前比較差異均無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。地塞米松中濃度組和高濃度組實(shí)驗(yàn)后的收縮壓、舒張壓均明顯高于實(shí)驗(yàn)前和正常對(duì)照組(P<0.05或0.01),地塞米松高濃度組實(shí)驗(yàn)后的收縮壓、舒張壓均明顯高于地塞米松低濃度組、中濃度組(P<0.01)。正常對(duì)照組和地塞米松低濃度組、中濃度組的實(shí)驗(yàn)前后心率兩兩比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05)。地塞米松高濃度組的實(shí)驗(yàn)后心率與正常對(duì)照組和地塞米松低濃度組、中濃度組比較差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05),但明顯高于其實(shí)驗(yàn)前(P<0.05)。
結(jié)論 地塞米松可加強(qiáng)心血管興奮引起升高血壓的作用,此作用存在量效關(guān)系;地塞米松用量達(dá)一定高濃度可加快心率。
【關(guān)鍵詞】 地塞米松;收縮壓;舒張壓;心率;小鼠
中圖分類號(hào):R544.1;R965 ? 文獻(xiàn)標(biāo)志碼:A ? DOI:10.3969/j.issn.1003-1383.2020.08.004
【Abstract】 Objective To explore the effect of dexamethasone on blood pressure and heart rate in mice,and to search for drugs for the preparation of animal hypertension model.
Methods 40 KM mice were randomly divided into normal control group(given 0.9% NaCl injection) and dexamethasone low concentration group,dexamethasone medium concentration group and dexamethasone high concentration group(given 1.25 mg/kg,2.5 mg/kg and 5.0 mg/kg dexamethasone injection,respectively).Intramuscular injection was performed once a day(dosage was calculated according to 10 mL/kg of mouse body weight) for 14 consecutive days.And then,systolic blood pressure,diastolic blood pressure and heart rate were measured 20 min after the last administration in each group.
Results There was no statistically significant difference in systolic blood pressure(SBP),diastolic blood pressure(DBP) and heart rate(HR) between the normal control group and dexamethasone low concentration group before and after experiment(P>0.05).After experiment,the systolic and diastolic blood pressure of dexamethasone in the middle and high concentration groups were all significantly higher than those before experiment and those in the normal control group(P<0.05 or 0.01),and those in the dexamethasone high concentration group were significantly higher than those in the dexamethasone low concentration group and dexamethasone medium concentration group(P<0.01).There was no statistically significant difference in heart rates between the normal control group,the dexamethasone low concentration group and the dexamethasone medium concentration group before and after experiment(P>0.05).After experiment,there was no statistically significant difference in heart rate between the dexamethasone high concentration group, the normal control group,the dexamethasone low concentration group and the middle concentration group(P>0.05),but they were all higher than those before experiment(P<0.05).
本研究結(jié)果警示,使用地塞米松治療的患者應(yīng)加強(qiáng)對(duì)血壓的監(jiān)測(cè),高血壓、冠心病、心腦血管意外的患者慎用。
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(收稿日期:2020-03-03 修回日期:2020-05-07)
(編輯:潘明志)