人参皂苷Rg1和Rb1改善慢性不可预测应激致大鼠抑郁、焦虑样行为的作用比较

目的研究人参皂苷Rg1和Rb1改善慢性不可预测应激诱导大鼠的抑郁样和焦虑样行为的作用及比较。方法SPF级SD雄性大鼠70只,适应5 d后进行糖水偏爱实验检测,根据糖水偏爱指数将动物分为7组,即对照组、模型组、氟西汀组、人参皂苷Rg124 mg/kg剂量组、人参皂苷Rg148 mg/kg剂量组、人参皂苷Rb133 mg/kg剂量组、人参皂苷Rb167 mg/kg剂量组。除对照组外,其余大鼠每天随机接受1~2种不同的刺激,造模时间共35 d。于第36天进行糖水偏爱、旷场实验、新奇环境摄食抑制实验、大鼠高架十字迷宫实验、强迫游泳等行为学实验,考察其抗抑郁、抗焦虑作用。采用ELISA法测定大鼠血清和海马IL⁃1β、IL⁃6、TNF⁃α炎症因子水平,血清皮质酮(CORT)水平。结果与模型组相比,人参皂苷Rg1、Rb1组大鼠糖水偏爱指数提升,强迫游泳不动时间显著减少,人参皂苷Rg148 mg/kg剂量组新奇抑制摄食潜伏期显著减少,人参皂苷Rg1(24和48 mg/kg)剂量组开臂时间的比例显著上升,人参皂苷Rg1、Rb1两个剂量组血清中皮质酮的含量显著减少,人参皂苷Rg124 mg/kg剂量组血清中IL⁃1β和IL⁃6的水平显著降低,人参皂苷Rb133 mg/kg剂量组血清中TNF⁃α和IL⁃6的水平显著降低,人参皂苷Rg1(48 mg/kg)、Rb1(67 mg/kg)剂量组海马中IL⁃1β、IL⁃6和TNF⁃α的含量显著降低。结论两种人参皂苷均可能通过调节HPA轴、抑制神经炎症,从而改善慢性不可预测应激致大鼠抑郁、焦虑样行为,此外人参皂苷Rg1的抗焦虑作用优于Rb1。

Ginsenoside Rb1 induces hepatic stellate cell ferroptosis to alleviate liver fibrosis via the BECN1/SLC7A11 axis

Liver fibrosis is primarily driven by the activation of hepatic stellate cells(HSCs),a process associated with ferroptosis.Ginsenoside Rb1(GRb1),a major active component extracted from Panax ginseng,inhibits HSC activation.However,the potential role of GRb1 in mediating HSC ferroptosis remains unclear.This study examined the effect of GRb1 on liver fibrosis both in vivo and in vitro,using CCl4-induced liver fibrosis mouse model and primary HSCs,LX-2 cells.The findings revealed that GRb1 effectively inactivated HSCs in vitro,reducing alpha-smooth muscle actin(a-SMA)and type I collagen(Col1A1)levels.Moreover,GRb1 significantly alleviated CCl4-induced liver fibrosis in vivo.From a mechanistic standpoint,the ferroptosis pathway appeared to be central to the antifibrotic effects of GRb1.Specifically,GRb1 promoted HSC ferroptosis both in vivo and in vitro,characterized by increased glutathione depletion,malondialdehyde production,iron overload,and accumulation of reactive oxygen species(ROS).Intriguingly,GRb1 increased Beclin 1(BECN1)levels and decreased the System Xc-key subunit SLC7A11.Further experiments showed that BECN1 silencing inhibited GRb1-induced effects on HSC ferroptosis and mitigated the reduction of SLC7A11 caused by GRb1.Moreover,BECN1 could directly interact with SLC7A11,initiating HSC ferroptosis.In conclusion,the suppression of BECN1 counteracted the effects of GRb1 on HSC inactivation both in vivo and in vitro.Overall,this study highlights the novel role of GRb1 in inducing HSC ferroptosis and promoting HSC inactivation,at least partly through its modulation of BECN1 and SLC7A11.

Crosstalk among Oxidative Stress,Autophagy,and Apoptosis in the Protective Effects of Ginsenoside Rb1 on Brain Microvascular Endothelial Cells:A Mixed Computational and Experimental Study

Objective Brain microvascular endothelial cells (BMECs) were found to shift from their usually inactive state to an active state in ischemic stroke (IS) and cause neuronal damage. Ginsenoside Rb1 (GRb1),a component derived from medicinal plants,is known for its pharmacological benefits in IS,but its protective effects on BMECs have yet to be explored. This study aimed to investigate the potential protective effects of GRb1 on BMECs. Methods An in vitro oxygen-glucose deprivation/reperfusion (OGD/R) model was established to mimic ischemia-reperfusion (I/R) injury. Bulk RNA-sequencing data were analyzed by using the Human Autophagy Database and various bioinformatic tools,including gene set enrichment analysis (GSEA),Gene Ontology (GO) classification and enrichment analysis,Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis,protein-protein interaction network analysis,and molecular docking. Experimental validation was also performed to ensure the reliability of our findings. Results Rb1 had a protective effect on BMECs subjected to OGD/R injury. Specifically,GRb1 was found to modulate the interplay between oxidative stress,apoptosis,and autophagy in BMECs. Key targets such as sequestosome 1 (SQSTM1/p62),autophagy related 5 (ATG5),and hypoxia-inducible factor 1-alpha (HIF-1α) were identified,highlighting their potential roles in mediating the protective effects of GRb1 against IS-induced damage. Conclusion GRbl protects BMECs against OGD/R injury by influencing oxidative stress,apoptosis,and autophagy. The identification of SQSTM1/p62,ATG5,and HIF-1α as promising targets further supports the potential of GRb1 as a therapeutic agent for IS,providing a foundation for future research into its mechanisms and applications in IS treatment.

GPCR-Gs mediates the protective effects of ginsenoside Rb1 against oxygen-glucose deprivation/re-oxygenation-induced astrocyte injury

Objectives:To investigate whether the protective actions of ginsenoside Rb1(Rb1)on astrocytes are mediated through the G_(s)-type G-protein-coupled receptor(GPCR-G_(s)).Methods:Primary astrocyte cultures derived from neonatal mouse brain were used.Astrocyte injury was induced via oxygen-glucose deprivation/re-oxygenation(OGD/R).Cell morphology,viability,lactate dehydrogenase(LDH)leakage,apoptosis,glutamate uptake,and brain-derived neurotrophic factor(BDNF)secretion were assessed to gauge cell survival and functionality.Western blot was used to investigate the cyclic adenosine monophosphate(cAMP)and protein kinase B(Akt)signaling pathways.GPCR-G_(s)-specific inhibitors and molecular docking were used to identify target receptors.Results:Rb1 at concentrations ranging from 0.8 to 5μM did not significantly affect the viability,glutamate uptake,or BDNF secretion in normal astrocytes.OGD/R reduced astrocyte viability,increasing their LDH leakage and apoptosis rate.It also decreased glutamate uptake and BDNF secretion by these cells.Rb1 had protective effects of astrocytes challenged by OGD/R,by improving viability,reducing apoptosis,and enhancing glutamate uptake and BDNF secretion.Additionally,Rb1 activated the cAMP and Akt pathways in these cells.When the GPCR-G_(s) inhibitor NF449 was introduced,the protective effects of Rb1 completely disappeared,and its activation of cAMP and Akt signaling pathways was significantly inhibited.Conclusion:Rb1 protects against astrocytes from OGD/R-induced injury through GPCR-G_(s) mediation.

Effect of ginsenoside Rg1 on hematopoietic stem cells in treating aplastic anemia in mice via MAPK pathway

BACKGROUND Aplastic anemia(AA)presents a significant clinical challenge as a life-threatening condition due to failure to produce essential blood cells,with the current the-rapeutic options being notably limited.AIM To assess the therapeutic potential of ginsenoside Rg1 on AA,specifically its protective effects,while elucidating the mechanism at play.METHODS We employed a model of myelosuppression induced by cyclophosphamide(CTX)in C57 mice,followed by administration of ginsenoside Rg1 over 13 d.The invest-igation included examining the bone marrow,thymus and spleen for pathological changes via hematoxylin-eosin staining.Moreover,orbital blood of mice was collected for blood routine examinations.Flow cytometry was employed to identify the impact of ginsenoside Rg1 on cell apoptosis and cycle in the bone marrow of AA mice.Additionally,the study further evaluated cytokine levels with enzyme-linked immunosorbent assay and analyzed the expression of key proteins in the MAPK signaling pathway via western blot.RESULTS Administration of CTX led to significant damage to the bone marrow’s structural integrity and a reduction in hematopoietic cells,establishing a model of AA.Ginsenoside Rg1 successfully reversed hematopoietic dysfunction in AA mice.In comparison to the AA group,ginsenoside Rg1 provided relief by reducing the induction of cell apoptosis and inflammation factors caused by CTX.Furthermore,it helped alleviate the blockade in the cell cycle.Treatment with ginsenoside Rg1 significantly alleviated myelosuppression in mice by inhibiting the MAPK signaling pathway.CONCLUSION This study suggested that ginsenoside Rg1 addresses AA by alleviating myelosuppression,primarily through modulating the MAPK signaling pathway,which paves the way for a novel therapeutic strategy in treating AA,highlighting the potential of ginsenoside Rg1 as a beneficial intervention.

Ginsenoside Rb1 protects dopaminergic neurons from inflammatory injury induced by intranigral lipopolysaccharide injection

Accumulating studies suggest that neuroinflammation characterized by microglial overactivation plays a pivotal role in the pathogenesis of Parkinson’s disease.As such,inhibition of microglial overactivation might be a promising treatment strategy to delay the onset or slow the progression of Parkinson’s disease.Ginsenoside Rbl,the most active ingredient of ginseng,reportedly exerts neuroprotective effects by suppressing inflammation in vitro.The present study aimed to evaluate the neuroprotective and anti-inflammatory effects of ginsenoside Rbl in a lipopolysaccharide-induced rat Parkinson’s disease model.Rats were divided into four groups.In the control group,sham-operated rats were intraperitoneally administered normal saline for 14 consecutive days.In the ginsenoside Rbl group,ginsenoside Rb1(20 mg/kg)was intraperitoneally injected for 14 consecutive days after sham surgery.In the lipopolysaccharide group,a single dose of lipopolysaccharide was unilaterally microinjected into the rat substantial nigra to establish the Parkinson’s disease model.Lipopolysaccharide-injected rats were treated with normal saline for 14 consecutive days.In the ginsenoside Rbl +lipopolysaccharide group,lipopolysaccharide was unilaterally microinjected into the rat substantial nigra.Subsequently,ginsenoside Rbl was intraperitoneally injected for 14 consecutive days.To investigate the therapeutic effects of ginsenoside Rbl,behavioral tests were performed on day 15 after lipopolysaccharide injection.We found that ginsenoside Rbl treatment remarkably reduced apomorphine-induced rotations in lipopolysaccharide-treated rats compared with the lipopolysaccharide group.To investigate the neurotoxicity of lipopolysaccharide and potential protective effect of ginsenoside Rbl,contents of dopamine and its metabolites in the striatum were measured by high-performance liquid chromatography.Compared with the lipopolysaccharide group,ginsenoside Rbl obviously attenuated the lipopolysaccharide-induced depletion of dopamine and its metabolites in the striatum.To further explore the neuroprotective effect of ginsenoside Rbl against lipopolysaccharide-induced neurotoxicity,immunohistochemistry and western blot assay of tyrosine hydroxylase were performed to evaluate dopaminergic neuron degeneration in the substantial nigra par compacta.The results showed that lipopolysaccharide injection caused a large loss of tyrosine hydroxylase-immunoreactive neurons in the substantia nigra and a significant decrease in overall tyrosine hydroxylase expression.However,ginsenoside Rb1 noticeably reversed these changes.To investigate whether the neuroprotective effect of ginsenoside Rbl was associated with inhibition of lipopolysaccharide-induced microglial activation,we examined expression of the microglia marker Iba-1.Our results confirmed that lipopolysaccharide injection induced a significant increase in Iba-1 expression in the substantia nigra;however,ginsenoside Rbl effectively suppressed lipopolysaccharide-induced microglial overactivation.To elucidate the inhibitory mechanism of ginsenoside Rb1,we examined expression levels of inflammatory mediators(tumor necrosis factor-a,interleukin-1β,inducible nitric oxide synthase,and cyclooxygenase 2)and phosphorylation of nuclear factor kappa B signaling-related proteins(IκB,IKK)in the substantia nigra with enzyme-linked immunosorbent and western blot assays.Our results revealed that compared with the control group,phosphorylation and expression of inflammatory mediators IκB and IKK in the substantia nigra of lipopolysaccharide group rats were significantly increased;whereas,ginsenoside Rbl obviously reduced lipopolysaccharide-induced changes on the lesioned side of the substantial nigra par compacta.These findings confirm that ginsenoside Rbl can inhibit inflammation induced by lipopolysaccharide injection into the substantia nigra and protect dopaminergic neurons,which may be related to its inhibition of the nuclear factor kappa B signaling pathway.This study was approved by the Experimental Animal Ethics Committee of Shandong University of China in April 2016(approval No.KYLL-2016-0148).

Ginsenoside Rb1 Attenuates Isoflurane/surgery-induced Cognitive Dysfunction via Inhibiting Neuroinflammation and Oxidative Stress

Objective Anesthetic isoflurane plus surgery has been reported to induce cognitive impairment. The underlying mechanism and targeted intervention remain largely to be determined. Ginsenoside Rb1 was reported to be neuroprotective. We therefore set out to determine whether ginsenoside Rb1 can attenuate isoflurane/surgery-induced cognitive dysfunction via inhibiting neuroinflammation and oxidative stress. Methods Five-months-old C57BL/6J female mice were treated with 1.4% isoflurane plus abdominal surgery for two hours. Sixty mg/kg ginsenoside Rb1 were given intraperitoneally from 7 days before surgery. Cognition of the mice were assessed by Barnes Maze. Levels of postsynaptic density-95 and synaptophysin in mice hippocampus were measured by Western blot. Levels of reactive oxygen species, tumor necrosis factor-α and interleukin-6 in mice hippocampus were measured by ELISA. Results Here we show for the first time that the ginsenoside Rb1 treatment attenuated the isoflurane/surgery-induced cognitive impairment. Moreover, ginsenoside Rb1 attenuated the isoflurane/surgery-induced synapse dysfunction. Finally, ginsenoside Rb1 mitigated the isoflurane/surgery-induced elevation levels of reactive oxygen species, tumor necrosis factor-α and interleukin-6 in the mice hippocampus. Conclusion These results suggest that ginsenoside Rb1 may attenuate the isoflurane/surgery-induced cognitive impairment by inhibiting neuroinflammation and oxidative stress pending future studies.

Ginsenoside Rb1 improves energy metabolism after spinal cord injury

Mitochondrial damage caused by oxidative stress and energy deficiency induced by focal ischemia and hypoxia are important factors that aggravate diseases.Studies have shown that ginsenoside Rb1 has neurotrophic and neuroprotective effects.However,whether it influences energy metabolism after spinal cord injury remains unclear.In this study,we treated mouse and cell models of spinal cord injury with ginsenoside Rb1.We found that ginsenoside Rb1 remarkably inhibited neuronal oxidative stress,protected mitochondria,promoted neuronal metabolic reprogramming,increased glycolytic activity and ATP production,and promoted the survival of motor neurons in the anterior horn and the recovery of motor function in the hind limb.Because sirtuin 3 regulates glycolysis and oxidative stress,mouse and cell models of spinal cord injury were treated with the sirtuin 3 inhibitor 3-TYP.When Sirt3 expression was suppressed,we found that the therapeutic effects of ginsenoside Rb1 on spinal cord injury were remarkably inhibited.Therefore,ginsenoside Rb1 is considered a potential drug for the treatment of spinal cord injury,and its therapeutic effects are closely related to sirtuin 3.

高效液相色谱法同时测定三七总皂苷中人参皂苷Rg_1、Re、Rb_1与三七皂苷R_1含量

目的建立高效液相色谱法同时测定三七总皂苷中人参皂苷Rg1、Re、Rb1与三七皂苷R1的方法。方法采用高效液相色谱法 ,固定相为氨基键合相 ,流动相为乙腈 水 ( 81∶1 9,V∶V) ,检测波长2 0 3nm。结果三七总皂苷中人参皂苷Rg1、Re、Rb1和三七皂苷R1与其他成分分离良好 ,保留时间分别约为 5 7min、8 9min、2 5 1min和 9 9min。人参皂苷Rg1在 80～ 2 80mg/L(r =0 9992 )、Re在 2 0～ 1 80mg/L(r=0 9993 )、Rb1在 95～ 2 85mg/L(r=0 9991 )、三七皂苷R1在1 8～ 1 4 6mg/L(r=0 9991 )内线性关系良好 ,人参皂苷Rg1、Re、Rb1和三七皂苷R1的回收率分别为 99 1 %、98 4 %、98 6%和 97 1 % ,RSD分别为 2 1 %、2 0 %、2 2 %、2 8%。

HPLC法同时测定三七总皂苷中人参皂苷Rg_1与Rb_1的含量

目的 建立 HPL C同时测定三七总皂苷中人参皂苷 Rg1 与 Rb1 的方法。方法 采用 HPL C法 ,以茶碱为内标 ,氨基键合相为固定相 ,流动相为乙腈 -水 (80∶ 2 0 ) ,检测波长 2 0 3nm。结果 三七总皂苷中人参皂苷 Rg1 和 Rb1与其他成分分离良好 ,保留时间分别约为 5 .7和 2 1.5 min。人参皂苷 Rg1 在 80～ 2 80μg/ m L (r=0 .9995 ) ,Rb1 在80～ 2 4 0 μg/ m L(r=0 .9993)线性关系良好 ,Rg1 和 Rb1 加样回收率分别为 97.1%和 98.4 %,RSD分别为 2 .4 4 %和 2 .35 %(n=9)。结论 本法操作简便 ,准确 ,重现性好 ,可用于人参及三七的质量控制。

Microbiological Transformation of Ginsenoside Rg_1

Forty-nine microbial strains were used to screen their ability for the microbiological transforma-tion of ginsenoside Rg1. Aspergillus niger (3.1858) and Absidia coerulea (3.3538) were found to convert ginsenoside Rg1 efficiently to less polar metabolites. Preparative scale transformation with both fungi Absidia coerulea (3.3538) and Aspergillus niger (3.1858) have resulted in the production of one same metabolite (MT1). Its structure was char-acterized as 6-O-b-D-glucopyranosyl-20(S)-protopanaxatriol (Ginsenoside Rh1) on the basis of its TOF-MS and 1H, 13C NMR spectral data. The biotransformation kinetic curves for Ginsenoside Rg1 and MT1 were reported for the first time, and the biotransformation pathway was proposed.

HPLC测定不同厂家复方丹参片中三七皂苷R_1和人参皂苷Re、Rg_1、Rb_1含量

目的：建立复方丹参片（丹参，三七，冰片）中三七有效成分的高效液相色谱测定方法。方法：采用Kromasil C18（5μm，250mm×4．60mm）色谱柱；流动相：乙腈-0．05％磷酸水溶液梯度洗脱（0～12min：乙腈浓度为22％；12～20min：乙腈的浓度由22％递升至28％；20～60min：乙腈的浓度由28％递升至43％）；流速为1mL／min，检测波长为203nm。结果：三七皂苷R1和人参皂苷Rg1、Re、Rb1的线性范围分别为0．326～3．260μg（r=0．9997），0．890～8．900μg（r=0．9998），0．144～1．440μg（r=0．9996），0．940～9．400μg（r=0．9998）；平均加样回收率（n=6）分别为99．08％，98．36％，97．54％，96．07％，RSD分别为4．41％，1．64％，2．77％，1．12％。结论：本测定方法简便可行、重复性好，可用于本制剂中三七多种有效成分的含量测定。

高效液相色谱法测定三七中三七皂苷R_1及人参皂苷Rg_1,Rb_1的含量

目的测定三七药材中三七皂苷的含量。方法采用高效液相色谱法C18色谱柱,乙腈∶水(15∶8512min30∶7045min15∶85v/v)梯度洗脱,检测波长203nm。结果三七R1在72.8～109μg·ml1的范围内(r=0.9991),人参Rg1在68.8～860μg·ml1的范围内(r=0.9992),Rb1在62.8～785μg·ml1的范围内(r=0.9998),线性关系良好。平均回收率大于98%,方法的变异系数小于3.0%。结论方法简便,快速,准确,重现性好,可用于三七药材中三七皂苷的含量测定。

HPLC-ELSD法测定血塞通注射液中三七皂苷R_1、人参皂苷Rg_1、Re、Rb_1、Rd

目的采用HPLC-ELSD法同时测定血塞通注射液(三七)中三七皂苷R1、人参皂苷Rg1、Re、Rb1、Rd。方法采用Venusil XBP C18(250 mm×4.6 mm,5μm)色谱柱,流动相为乙腈-水梯度洗脱,体积流量1 mL/min,柱温30℃,雾化管温度36℃,漂移管温度70℃,载气压力25 psi(1 psi=6.895 kPa)。结果三七皂苷R1、人参皂苷Rg1、Re、Rb1、Rd分别在2.78～27.8μg/mL,9.24～92.4μg/mL,0.384～3.84μg/mL,5.55～55.5μg/mL,1.904～19.04μg/mL呈良好线性关系;血塞通注射液中三七皂苷R1、人参皂苷Rg1、Re、Rb1、Rd平均回收率(n=6)分别为97.60%、100.71%、98.14%、100.94%、99.69%。结论该方法简便、准确、分离好,灵敏度高,重复性好,无干扰,可用于血塞通注射液的质量评价及三七制剂的质量控制。

人参皂甙Rb_1和Rg_1对幼小鼠性腺和副性腺的影响

幼年小鼠皮下注射人参皂甙Ｒｂ１６ｍｇ／ｋｇ、Ｒｇ１２５和５０ｍｇ／ｋｇ连续１４天，结果Ｒｂ１能能使正常雌性小鼠子宫及雄性小鼠精囊明显增重，Ｒｇ１也可使正常雄性小鼠精囊明显增重，但却不能阻止去势小鼠副性腺的萎缩。提示人参皂甙本身无性激素样作用。

缓释辅料对三七总皂苷缓释片中人参皂苷Rg_1,Rb_1释药特性的影响

目的 :探讨缓释辅料对三七总皂苷缓释片中人参皂苷Rg1,Rb1释药特性的影响。方法 :通过考察由HPMC和EC 2种缓释辅料 ,不同黏度规格的EC ,以及EC的不同用量制成的缓释骨架片 ,测定人参皂苷Rg1,Rb1在这些缓释片中的释放度。结果 :缓释辅料的种类 ,规格及用量均影响人参皂苷Rg1,Rb1的释药特性 ,在各缓释片中人参皂苷Rg1,Rb1间的释药行为也存在差异。结论 :中药有效部位缓释制剂研究中应当重视有效成分间释药特性的异同。

人参皂甙Rb_1、Rb_3、Rg_1对培养皮层神经细胞的抗缺血效应及其机制

目的 研究人参皂甙 (Ginsenosides,GS)的 3种单体成分GSRb1、Rb3 、Rg1对培养的皮层神经细胞的抗缺血效应及其机制。方法 体外培养小鼠胎鼠大脑皮层神经细胞 ,观察缺血 /再灌注对神经细胞的毒性及GSRb1、Rb3 、Rg1的保护作用。结果 培养的小鼠胎鼠大脑皮层神经细胞缺血 /再灌注损伤后 ,细胞出现明显损伤性变化 ,神经细胞活性降低 ,电镜观察显示神经细胞呈变性至坏死等不同程度的损伤 ,死亡率明显升高 ,培养上清液中乳酸脱氢酶 (LDH)释放量增加 ,而细胞匀浆中超氧化物歧化酶 (SOD)含量明显减少 ,丙二醛 (MDA)生成显著增多。GSRb1、Rb3 、Rg16 0 μmol/L能不同程度地抑制缺血 /再灌注引起的损伤性改变 ,培养上清液中LDH释放减少 ,而细胞匀浆中SOD含量明显增加 ,MDA生成显著降低。结论 (1)GSRb1、Rb3 、Rg1对神经细胞有明显的抗缺血效应 ;(2 )GSRb1、Rb3 、Rg1抗缺血的作用机制可能与其提高神经细胞抗氧化能力、减少自由基的生成 ,保护细胞的结构与功能有关。

RP-HPLC梯度法测定血塞通滴丸中三七皂苷R_1、人参皂苷Rb_1及人参皂苷Rg_1的含量

目的 :用高效液相色谱梯度洗脱法同时检测血塞通滴丸中三七皂苷R1、人参皂苷Rb1、人参皂苷Rg13种皂苷含量的方法 ,为制定质量标准中含量测定方法及含量限度提供了依据。方法 :用大连SpherisorbC18分析柱 ,乙腈 水线性梯度洗脱 ,0～ 15min(2 0∶80 - 4 0∶6 0 ) ,流速 1.0mL·min-1,检测波长 2 0 3nm。结果 :R1,Rf1和Rb1线性范围分别为 1.0 2～ 9.18μg ,4 .8～ 4 3.4 μg和 4 .6～ 4 1.6 μg。该方法回收率R1为 10 1.0 % (RSD =3.18% ) ,Rb1为 10 0 .0 % (RSD =1.19% ) ,Rg1为 99.5 % (RSD =3.0 2 % )。结论 :HPLC梯度洗脱法能将多种皂苷很好地分离检测 ,提高了时效 ,减少了误差 ,结果表明该方法准确可靠 ,重现性好 。

HPLC/MS/MS法同时测定小鼠血浆中人参皂苷Rg_1、Re、Rb_1

利用高效液相色谱-串联质谱联用的技术，建立同时测定小鼠血浆中的人参皂苷Rg1、Re、Rb1浓度的分析方法．以RESTEK Pinnacle Ⅱ C18柱（50mm×2．1mm，5μm）为色谱柱，流动相：乙腈-水（梯度洗脱）；流速200μL·min^-1；柱温：20℃；质谱条件为气动辅助电喷雾离子源（ESI），检测方式为正离子多离子反应监测（MRM），用于定量分析的离子为m／zRg1 832．8→643．6；Re969．8→789．7；Rb1 1132．1→365．3；生物样品采用固相萃取方法处理．人参皂苷Rg1、Re、Rb1标准曲线的线性范围为0．5～1000ng·mL^-1，最低定量下限达到0．5ng·mL^-1，日内、日间变异系数（RSD）均〈15％，精密度和准确度等均符合生物样品分析的要求．结果表明该法准确、灵敏、特异，适用于血浆中人参皂苷Rg1、Re、Rb1浓度的同时测定．