BACKGROUND Antagonists of cannabinoid type 1 receptor(CB1)have been shown to promote body weight loss and improve insulin sensitivity.Cannabinoids decrease adiponectin,and CB1 blocker increase adiponectin.However,the ...BACKGROUND Antagonists of cannabinoid type 1 receptor(CB1)have been shown to promote body weight loss and improve insulin sensitivity.Cannabinoids decrease adiponectin,and CB1 blocker increase adiponectin.However,the mediators of CB1 actions are not well defined.AIM To investigate whether the beneficial effects of CB1 inhibition are,at least in part,mediated by adiponectin.METHODS We compared metabolic and inflammatory phenotypes of wild-type(WT)mice,CB1-null(CB1^(-/-))and CB1/adiponectin double-knockout(DKO)mice.We assessed the insulin sensitivity using insulin tolerance test and glucose tolerance test,and inflammation using flow cytometry analysis of macrophages.RESULTS CB1^(-/-)mice exhibited significantly reduced body weight and fat mass when compared to WT mice.While no significance was found in total daily food intake and locomotor activity,CB1^(-/-)mice showed increased energy expenditure,enhanced thermogenesis in brown adipose tissue(BAT),and improved insulin sensitivity compared to WT mice.DKO showed no difference in body weight,adiposity,nor insulin sensitivity;only showed a modestly elevated thermogenesis in BAT compared to CB1^(-/-)mice.The metabolic phenotype of DKO is largely similar to CB1^(-/-)mice,suggesting that adiponectin is not a key mediator of the metabolic effects of CB1.Interestingly,CB1^(-/-)mice showed reduced pro-inflammatory macrophage polarization in both peritoneal macrophages and adipose tissue macrophages compared to WT mice;in contrast,DKO mice exhibited increased pro-inflammatory macrophage polarization in these macrophages compared to CB1^(-/-)mice,suggesting that adiponectin is an important mediator of the inflammatory effect of CB1.CONCLUSION Our findings reveal that CB1 functions through both adiponectin-dependent and adiponectin-independent mechanisms:CB1 regulates energy metabolism in an adiponectin-independent manner,and inflammation in an adiponectin-dependent manner.The differential effects of adiponectin on CB1-mediated metabolic and inflammatory functions should be taken into consideration in CB1 antagonist utilization.展开更多
OBJECTIVE Cannabis can be rewarding or aversive.Cannabis reward is believed to be mediated by activation of cannabinoid CB1 receptors(CB1 Rs) on GABAergic neurons that disinhibit dopaminergic neurons in the ventral te...OBJECTIVE Cannabis can be rewarding or aversive.Cannabis reward is believed to be mediated by activation of cannabinoid CB1 receptors(CB1 Rs) on GABAergic neurons that disinhibit dopaminergic neurons in the ventral tegmental area(VTA).However,little is known about the mechanisms underlying cannabis aversion in rodents.Our study aimed at dig the mechanisms underlying cannabis aversion.METHODS We first created CB1-floxed mice and then generated conditional CB1-knockout mice(VgluT2-CB1-/-) in glutamatergic neurons that express vesicular glutamate transporter 2(VgluT2).We then used immunohistochemistry and RNAscope in situ hybridization assays to examine whether CB1 Rs are expressed in VTA GABAergic neurons and glutamatergic neurons.We also used Cre-dependent viral vector to express light-sensitive channelrhodopsin-2 into VTA glutamatergic neurons.Next,conditioned place preference and intracranial self-stimulation(ICSS) maintained by optical activation of VTA glutamatergic neurons were employed to evaluate the effects of Δ9-THC on brain reward function.RESULTS CB1 Rs are found not only on VTA GABAergic neurons,but also on VTA glutamatergic neurons that express vesicular glutamate transporter 2(VgluT2).Photoactivation of VTA glutamatergic neurons produced robust intracranial self-stimulation(ICSS) behavior,which was dose-dependently blocked by DA receptor antagonists,but enhanced by cocaine.In contrast,Δ9-tetrahydrocannabinol(Δ9-THC),the major psychoactive component of cannabis,produced dose-dependent conditioned place aversion and a reduction in the above optical ICSS in VgluT2-cre control mice,but not in VgluT2-CB1-/-mice.CONCLUSION Activation of CB1 Rs in VgluT2-expressing glutamate neurons produces aversive effects that might explain why cannabinoid is not rewarding in rodents and might also account for individual differences in the hedonic effects of cannabis in humans.展开更多
Background:The expression,localization,and function of the endocannabinoid system has been well characterized in recent years in the monkey retina and in the primary thalamic relay,the lateral geniculate nucleus(dLGN)...Background:The expression,localization,and function of the endocannabinoid system has been well characterized in recent years in the monkey retina and in the primary thalamic relay,the lateral geniculate nucleus(dLGN).Few data are available on cortical recipients’structures of the dLGN,namely the primary visual cortex(V1).The goal of this study is to characterize the expression and localization of the metabotropic cannabinoid receptor type 1(CB1R),the synthesizing enzyme N-acyl phosphatidyl-ethanolamine phospholipase D(NAPE-PLD),and the degradation enzyme fatty acid amide hydrolase(FAAH)in the vervet monkey area V1.Methods:Using Western blots and immunohistochemistry,we investigated the expression patterns of CB1R,NAPE-PLD,and FAAH in the vervet monkey primary visual cortex.Results:CB1R,NAPE-PLD,and FAAH were expressed in the primary visual cortex throughout the rostro-caudal axis.CB1R showed very low levels of staining in cortical layer 4,with higher expressions in all other cortical layers,especially layer 1.NAPE-PLD and FAAH expressions were highest in layers 1,2 and 3,and lowest in layer 4.Conclusions:Interestingly enough,CB1R was very low in layer 4 of V1 in comparison to the other cortical layers.The visual information coming from the dLGN and entering layer 4Calpha(magno cells)and 4Cbeta(parvo cells)may be therefore modulated by the higher expression levels of CB1R in cortical layers 2 and 3 on the way to the dorsal and ventral visual streams.This is further supported by the higher expression of NAPE-PLD and FAAH in the outer cortical layers.These data indicate that CB1R system can influence the network of activity patterns in the visual stream after the visual information has reached area V1.These novel results provide insights for understanding the role of the endocannabinoids in the modulation of cortical visual inputs,and hence,visual perception.展开更多
Background:The goal of this study is to determine the expression and localization of the cannabinoid receptor type 1(CB1R),the synthesizing enzyme N-acyl phosphatidyl-ethanolamine phospholipase D(NAPE-PLD),and the deg...Background:The goal of this study is to determine the expression and localization of the cannabinoid receptor type 1(CB1R),the synthesizing enzyme N-acyl phosphatidyl-ethanolamine phospholipase D(NAPE-PLD),and the degradation enzyme fatty acid amide hydrolase(FAAH)in the vervet monkey area V1 to better understand the mechanisms underlying the effects of eCB system modulation on cortical visual processing.Methods:Using Western blots and immunohistochemistry,we investigated the laminar and cellular expression patterns of CB1R,NAPE-PLD,and FAAH across the rostrocaudal axis of the vervet monkey(Chlorocebus sabaeus)primary visual cortex.Results:CB1R,NAPE-PLD,and FAAH were expressed in V1 throughout the rostrocaudal axis.CB1R showed very low staining in layer(L)4,with higher expression in all other layers,especially L1,followed by L2 and L3.NAPE-PLD and FAAH expression patterns were similar,but not quite as low in L4.CB1R,NAPE-PLD,and FAAH were localized in vGlut2-positive cells,representing glutamatergic projection neurons,and in somatostatin(SST)-positive cells,a class of GABAergic interneurons.Conclusions:The low level of CB1R in L4 indicates less direct endocannabinoid modulation of V1 afferents from the dLGN,but that greater modulation may occur via the higher expression of CB1R in L2 and L3 on the way to the dorsal and ventral visual streams.This is further supported by the higher expression of NAPE-PLD and FAAH in these layers.Expression in vGlut2-positive and SST-positive cells represents a role at both glutamatergic and GABAergic neurons.These data indicate that CB1R may influence the network of activity patterns in the visual streams after the visual information has reached V1,and thus may influence visual perception.展开更多
目的探讨大麻素受体1型(CNR1)基因rs1049353位点多态性与早期2型糖尿病患者利拉鲁肽疗效的关系。方法选择早期2型糖尿病患者241例,均给予利拉鲁肽皮下注射,以0.6 mg/d为初始剂量,随后剂量逐渐增加至1.2 mg/d,连续治疗4个月。分析所有患...目的探讨大麻素受体1型(CNR1)基因rs1049353位点多态性与早期2型糖尿病患者利拉鲁肽疗效的关系。方法选择早期2型糖尿病患者241例,均给予利拉鲁肽皮下注射,以0.6 mg/d为初始剂量,随后剂量逐渐增加至1.2 mg/d,连续治疗4个月。分析所有患者CNR1基因rs1049353位点的基因分型;比较不同基因分型对利拉鲁肽疗效的影响;检测不同基因分型患者CNR1 mRNA表达;观察患者治疗期间不良反应发生情况。治疗前后计算BMI,检测餐后2 h血糖(2 h PG)、空腹血糖(FPG)、糖化血红蛋白(HbA1c);于治疗前采用聚合酶链反应(PCR)检测CNR1基因多态性;用RT-PCR法检测外周血单核细胞(PBMC)CNR1 mRNA表达。结果241例患者rs1049353位点的基因分型:GA型46例,占19.09%;AA型5例,占2.07%;GG型190例,占78.84%。241例患者治疗后BMI、2 h PG、HbA1c、FPG均较治疗前降低(P均<0.05);治疗后GA型/AA型、GG型BMI、2 h PG、HbA1c、FPG水平均低于治疗前(P均<0.05);治疗后GA型/AA型BMI、HbA1c、FPG水平均较GG型低(P均<0.05),不同基因型患者2 h PG水平比较差异无统计学意义(P>0.05)。GG型患者PBMC中CNR1 mRNA相对表达量高于GA型/AA型患者(P<0.05)。不同基因型患者不良反应发生率比较差异无统计学意义(P>0.05)。结论利拉鲁肽治疗早期2型糖尿病的疗效与CNR1基因多态性有关,GA/AA型患者利拉鲁肽治疗效果优于GG型患者。展开更多
抑郁症是常见的神经精神疾病之一,因其高患病率、复发率和自杀率而受到广泛关注。以往研究认为,星形胶质细胞在抑郁症病理生理过程中发挥重要功能,但星形胶质细胞参与抑郁症发病的具体机制尚不完全清楚。内源性大麻素系统与神经精神疾...抑郁症是常见的神经精神疾病之一,因其高患病率、复发率和自杀率而受到广泛关注。以往研究认为,星形胶质细胞在抑郁症病理生理过程中发挥重要功能,但星形胶质细胞参与抑郁症发病的具体机制尚不完全清楚。内源性大麻素系统与神经精神疾病密切相关,尤其是在焦虑和抑郁等情感障碍的治疗中发挥着重要作用。大麻素受体1(cannabinoid receptor type 1,CB1R)作为内源性大麻素系统中的重要组成部分,其在抑郁症中的作用受到广泛关注。研究发现,CB1R可表达于星形胶质细胞,其可能通过调节星形胶质细胞的功能活动来参与抑郁症的发生、发展。因此,本文旨在回顾内源性大麻素系统的组成、CB1R和星形胶质细胞在治疗抑郁症中的作用、CB1R参与调节星形胶质细胞功能的研究进展进行综述。展开更多
目的:探讨大鼠脑在体和培养中星形胶质细胞大麻素Ⅰ型受体(cannabinoid type 1 receptor,CB1R)表达特点。方法:取3月龄大鼠脑海马切片,进行胶质纤维酸性蛋白(GFAP)和CB1R荧光免疫荧光双标染色;同时取刚出生大鼠鼠脑进行原代、传代培养,...目的:探讨大鼠脑在体和培养中星形胶质细胞大麻素Ⅰ型受体(cannabinoid type 1 receptor,CB1R)表达特点。方法:取3月龄大鼠脑海马切片,进行胶质纤维酸性蛋白(GFAP)和CB1R荧光免疫荧光双标染色;同时取刚出生大鼠鼠脑进行原代、传代培养,获取高纯度星形胶质细胞,行GFAP和CB1R免疫荧光双标染色。所有标本在激光共聚焦显微镜下,观察星形胶质细胞CB1R表达状况。结果:大鼠在体海马切片染色显示,CB1R呈点状分布于海马CA1区,尤其以锥体细胞层明显,GFAP标记的星形胶质细胞CB1R呈阴性表达;而培养中的GFAP标记阳性的星形胶质细胞,CB1R呈阳性表达,且主要集中在细胞核周围分布。结论:在体海马和细胞培养中的星形胶质细胞CB1R表达不同,与生理状态比较,细胞培养状态下星形胶质细胞CB1R表达存在明显改变。展开更多
大麻素受体是中枢神经系统表达丰富的G蛋白偶联受体,也是治疗炎症、疼痛及药物滥用潜在的药物靶点。大麻素受体主要包括大麻素1型受体(cannabinoid type 1 receptor, CB1R)、大麻素2型受体(cannabinoid type 2receptor, CB2R)及其他受体...大麻素受体是中枢神经系统表达丰富的G蛋白偶联受体,也是治疗炎症、疼痛及药物滥用潜在的药物靶点。大麻素受体主要包括大麻素1型受体(cannabinoid type 1 receptor, CB1R)、大麻素2型受体(cannabinoid type 2receptor, CB2R)及其他受体。CB1R在调节中枢记忆、认知和运动等方面发挥关键作用,因此筛选具有激动CB1R活性的化合物具有治疗神经系统疾病的潜在价值。本研究使用的载体质粒将CB1R胞内第三环(intracellular loop3, ICL3)基因序列置换为环状绿色荧光蛋白(circular-permutated enhanced green fluorescent protein, cpEGFP)。慢病毒包装后感染HEK 293T细胞,经嘌呤霉素筛选获得高表达CB1R-cpEGFP的稳定细胞株。当激动剂与CB1R结合后,膜受体构象发生改变,膜受体内cpEGFP的发色团去质子化产生绿色荧光,通过检测荧光强度评价激动CB1R的活性物质。本研究利用CB1R激动剂花生四烯酸-2′-氯乙酰胺(arachidonyl-2′-chloroethylamide, ACEA)作为阳性对照评价模型的可靠性。研究发现, ACEA可激活细胞模型受体,表现为荧光强度增加,这种效应能够被CB1R特异性拮抗剂利莫那班(rimonabant)阻断,导致荧光消失。本研究利用荧光探针成功构建CB1R激动剂细胞筛选模型。展开更多
基金Supported by the NIH,No.DK118334 and No.AG064869and the BrightFocus,No.A2019630S(to Sun Y).
文摘BACKGROUND Antagonists of cannabinoid type 1 receptor(CB1)have been shown to promote body weight loss and improve insulin sensitivity.Cannabinoids decrease adiponectin,and CB1 blocker increase adiponectin.However,the mediators of CB1 actions are not well defined.AIM To investigate whether the beneficial effects of CB1 inhibition are,at least in part,mediated by adiponectin.METHODS We compared metabolic and inflammatory phenotypes of wild-type(WT)mice,CB1-null(CB1^(-/-))and CB1/adiponectin double-knockout(DKO)mice.We assessed the insulin sensitivity using insulin tolerance test and glucose tolerance test,and inflammation using flow cytometry analysis of macrophages.RESULTS CB1^(-/-)mice exhibited significantly reduced body weight and fat mass when compared to WT mice.While no significance was found in total daily food intake and locomotor activity,CB1^(-/-)mice showed increased energy expenditure,enhanced thermogenesis in brown adipose tissue(BAT),and improved insulin sensitivity compared to WT mice.DKO showed no difference in body weight,adiposity,nor insulin sensitivity;only showed a modestly elevated thermogenesis in BAT compared to CB1^(-/-)mice.The metabolic phenotype of DKO is largely similar to CB1^(-/-)mice,suggesting that adiponectin is not a key mediator of the metabolic effects of CB1.Interestingly,CB1^(-/-)mice showed reduced pro-inflammatory macrophage polarization in both peritoneal macrophages and adipose tissue macrophages compared to WT mice;in contrast,DKO mice exhibited increased pro-inflammatory macrophage polarization in these macrophages compared to CB1^(-/-)mice,suggesting that adiponectin is an important mediator of the inflammatory effect of CB1.CONCLUSION Our findings reveal that CB1 functions through both adiponectin-dependent and adiponectin-independent mechanisms:CB1 regulates energy metabolism in an adiponectin-independent manner,and inflammation in an adiponectin-dependent manner.The differential effects of adiponectin on CB1-mediated metabolic and inflammatory functions should be taken into consideration in CB1 antagonist utilization.
文摘OBJECTIVE Cannabis can be rewarding or aversive.Cannabis reward is believed to be mediated by activation of cannabinoid CB1 receptors(CB1 Rs) on GABAergic neurons that disinhibit dopaminergic neurons in the ventral tegmental area(VTA).However,little is known about the mechanisms underlying cannabis aversion in rodents.Our study aimed at dig the mechanisms underlying cannabis aversion.METHODS We first created CB1-floxed mice and then generated conditional CB1-knockout mice(VgluT2-CB1-/-) in glutamatergic neurons that express vesicular glutamate transporter 2(VgluT2).We then used immunohistochemistry and RNAscope in situ hybridization assays to examine whether CB1 Rs are expressed in VTA GABAergic neurons and glutamatergic neurons.We also used Cre-dependent viral vector to express light-sensitive channelrhodopsin-2 into VTA glutamatergic neurons.Next,conditioned place preference and intracranial self-stimulation(ICSS) maintained by optical activation of VTA glutamatergic neurons were employed to evaluate the effects of Δ9-THC on brain reward function.RESULTS CB1 Rs are found not only on VTA GABAergic neurons,but also on VTA glutamatergic neurons that express vesicular glutamate transporter 2(VgluT2).Photoactivation of VTA glutamatergic neurons produced robust intracranial self-stimulation(ICSS) behavior,which was dose-dependently blocked by DA receptor antagonists,but enhanced by cocaine.In contrast,Δ9-tetrahydrocannabinol(Δ9-THC),the major psychoactive component of cannabis,produced dose-dependent conditioned place aversion and a reduction in the above optical ICSS in VgluT2-cre control mice,but not in VgluT2-CB1-/-mice.CONCLUSION Activation of CB1 Rs in VgluT2-expressing glutamate neurons produces aversive effects that might explain why cannabinoid is not rewarding in rodents and might also account for individual differences in the hedonic effects of cannabis in humans.
文摘Background:The expression,localization,and function of the endocannabinoid system has been well characterized in recent years in the monkey retina and in the primary thalamic relay,the lateral geniculate nucleus(dLGN).Few data are available on cortical recipients’structures of the dLGN,namely the primary visual cortex(V1).The goal of this study is to characterize the expression and localization of the metabotropic cannabinoid receptor type 1(CB1R),the synthesizing enzyme N-acyl phosphatidyl-ethanolamine phospholipase D(NAPE-PLD),and the degradation enzyme fatty acid amide hydrolase(FAAH)in the vervet monkey area V1.Methods:Using Western blots and immunohistochemistry,we investigated the expression patterns of CB1R,NAPE-PLD,and FAAH in the vervet monkey primary visual cortex.Results:CB1R,NAPE-PLD,and FAAH were expressed in the primary visual cortex throughout the rostro-caudal axis.CB1R showed very low levels of staining in cortical layer 4,with higher expressions in all other cortical layers,especially layer 1.NAPE-PLD and FAAH expressions were highest in layers 1,2 and 3,and lowest in layer 4.Conclusions:Interestingly enough,CB1R was very low in layer 4 of V1 in comparison to the other cortical layers.The visual information coming from the dLGN and entering layer 4Calpha(magno cells)and 4Cbeta(parvo cells)may be therefore modulated by the higher expression levels of CB1R in cortical layers 2 and 3 on the way to the dorsal and ventral visual streams.This is further supported by the higher expression of NAPE-PLD and FAAH in the outer cortical layers.These data indicate that CB1R system can influence the network of activity patterns in the visual stream after the visual information has reached area V1.These novel results provide insights for understanding the role of the endocannabinoids in the modulation of cortical visual inputs,and hence,visual perception.
文摘Background:The goal of this study is to determine the expression and localization of the cannabinoid receptor type 1(CB1R),the synthesizing enzyme N-acyl phosphatidyl-ethanolamine phospholipase D(NAPE-PLD),and the degradation enzyme fatty acid amide hydrolase(FAAH)in the vervet monkey area V1 to better understand the mechanisms underlying the effects of eCB system modulation on cortical visual processing.Methods:Using Western blots and immunohistochemistry,we investigated the laminar and cellular expression patterns of CB1R,NAPE-PLD,and FAAH across the rostrocaudal axis of the vervet monkey(Chlorocebus sabaeus)primary visual cortex.Results:CB1R,NAPE-PLD,and FAAH were expressed in V1 throughout the rostrocaudal axis.CB1R showed very low staining in layer(L)4,with higher expression in all other layers,especially L1,followed by L2 and L3.NAPE-PLD and FAAH expression patterns were similar,but not quite as low in L4.CB1R,NAPE-PLD,and FAAH were localized in vGlut2-positive cells,representing glutamatergic projection neurons,and in somatostatin(SST)-positive cells,a class of GABAergic interneurons.Conclusions:The low level of CB1R in L4 indicates less direct endocannabinoid modulation of V1 afferents from the dLGN,but that greater modulation may occur via the higher expression of CB1R in L2 and L3 on the way to the dorsal and ventral visual streams.This is further supported by the higher expression of NAPE-PLD and FAAH in these layers.Expression in vGlut2-positive and SST-positive cells represents a role at both glutamatergic and GABAergic neurons.These data indicate that CB1R may influence the network of activity patterns in the visual streams after the visual information has reached V1,and thus may influence visual perception.
文摘目的探讨大麻素受体1型(CNR1)基因rs1049353位点多态性与早期2型糖尿病患者利拉鲁肽疗效的关系。方法选择早期2型糖尿病患者241例,均给予利拉鲁肽皮下注射,以0.6 mg/d为初始剂量,随后剂量逐渐增加至1.2 mg/d,连续治疗4个月。分析所有患者CNR1基因rs1049353位点的基因分型;比较不同基因分型对利拉鲁肽疗效的影响;检测不同基因分型患者CNR1 mRNA表达;观察患者治疗期间不良反应发生情况。治疗前后计算BMI,检测餐后2 h血糖(2 h PG)、空腹血糖(FPG)、糖化血红蛋白(HbA1c);于治疗前采用聚合酶链反应(PCR)检测CNR1基因多态性;用RT-PCR法检测外周血单核细胞(PBMC)CNR1 mRNA表达。结果241例患者rs1049353位点的基因分型:GA型46例,占19.09%;AA型5例,占2.07%;GG型190例,占78.84%。241例患者治疗后BMI、2 h PG、HbA1c、FPG均较治疗前降低(P均<0.05);治疗后GA型/AA型、GG型BMI、2 h PG、HbA1c、FPG水平均低于治疗前(P均<0.05);治疗后GA型/AA型BMI、HbA1c、FPG水平均较GG型低(P均<0.05),不同基因型患者2 h PG水平比较差异无统计学意义(P>0.05)。GG型患者PBMC中CNR1 mRNA相对表达量高于GA型/AA型患者(P<0.05)。不同基因型患者不良反应发生率比较差异无统计学意义(P>0.05)。结论利拉鲁肽治疗早期2型糖尿病的疗效与CNR1基因多态性有关,GA/AA型患者利拉鲁肽治疗效果优于GG型患者。
文摘抑郁症是常见的神经精神疾病之一,因其高患病率、复发率和自杀率而受到广泛关注。以往研究认为,星形胶质细胞在抑郁症病理生理过程中发挥重要功能,但星形胶质细胞参与抑郁症发病的具体机制尚不完全清楚。内源性大麻素系统与神经精神疾病密切相关,尤其是在焦虑和抑郁等情感障碍的治疗中发挥着重要作用。大麻素受体1(cannabinoid receptor type 1,CB1R)作为内源性大麻素系统中的重要组成部分,其在抑郁症中的作用受到广泛关注。研究发现,CB1R可表达于星形胶质细胞,其可能通过调节星形胶质细胞的功能活动来参与抑郁症的发生、发展。因此,本文旨在回顾内源性大麻素系统的组成、CB1R和星形胶质细胞在治疗抑郁症中的作用、CB1R参与调节星形胶质细胞功能的研究进展进行综述。
文摘目的:探讨大鼠脑在体和培养中星形胶质细胞大麻素Ⅰ型受体(cannabinoid type 1 receptor,CB1R)表达特点。方法:取3月龄大鼠脑海马切片,进行胶质纤维酸性蛋白(GFAP)和CB1R荧光免疫荧光双标染色;同时取刚出生大鼠鼠脑进行原代、传代培养,获取高纯度星形胶质细胞,行GFAP和CB1R免疫荧光双标染色。所有标本在激光共聚焦显微镜下,观察星形胶质细胞CB1R表达状况。结果:大鼠在体海马切片染色显示,CB1R呈点状分布于海马CA1区,尤其以锥体细胞层明显,GFAP标记的星形胶质细胞CB1R呈阴性表达;而培养中的GFAP标记阳性的星形胶质细胞,CB1R呈阳性表达,且主要集中在细胞核周围分布。结论:在体海马和细胞培养中的星形胶质细胞CB1R表达不同,与生理状态比较,细胞培养状态下星形胶质细胞CB1R表达存在明显改变。
