Neurotensin receptor 1 overexpression in inflammatory bowel diseases and colitis-associated neoplasia

AIM: To explore the association of neurotensin receptor 1 (NTSR1) with inflammatory bowel diseases (IBD) and colitis-associated neoplasia. METHODS: NTSR1 was detected by immunohistochemistry in clinical samples of colonic mucosa with IBD colitis, colitis-associated raised low-grade dysplasia (LGD) including dysplasia-associated lesions or masses (DALMs, n = 18) and adenoma-like dysplastic polyps (ALDPs, n = 4), colitis-associated high-grade dysplasia (HGD, n = 11) and colitis-associated colorectal carcinoma (CACRC, n = 13), sporadic colorectal adenomatous polyp (SAP, n = 17), and sporadic colorectal carcinoma (SCRC, n = 12). The immunoreactivity of NTSR1 was semiquantitated (as negative, 1+, 2+, and 3+) and compared among different conditions.RESULTS: NTSR1 was not detected in normal mucosa but was expressed similarly in both active and inactive colitis. LGD showed a significantly stronger expression as compared with non-dysplastic colitic mucosa, with significantly more cases showing > 2+ intensity (68.75% in LGD vs 32.26% in nondysplastic mucosa, P = 0.001). However, no significant difference existed between DALMs and ALDPs. CACRC and HGD showed a further stronger expression, with significantly more cases showing 3+ intensity than that in LGD (61.54% vs 12.50% for CACRC vs LGD, P = 0.022; 58.33% vs 12.50% for CACRC/HGD vs LGD, P = 0.015). No significant difference existed between colitis-associated and non-colitic sporadic neoplasia. CONCLUSION: NTSR1 in colonic epithelial cells is overexpressed in IBD, in a stepwise fashion with sequential progress from inflammation to dysplasia and carcinoma.

Experimental obstructive jaundice alters claudin-4 expression in intestinal mucosa: Effect of bombesin and neurotensin

AIM： To investigate the influence of experimental obstructive jaundice and exogenous bombesin （BBS） and neurotensin （NT） administration on the expression of the tight junction （TJ）-protein claudin-4 in intestinal epithelium of rats. METHODS： Forty male Wistar rats were randomly divided into five groups： Ⅰ = controls, Ⅱ = sham operated,Ⅲ = bile duct ligation （BDL）,Ⅳ = BDL＋BBS （30μg/kg per d）, V = BDL＋NT （300μg/kg per d）. At the end of the experiment on d 10, endotoxin was measured in portal and aortic blood. Tissue sections of the terminal ileum were examined histologically and immunohistochemically for evaluation of claudin-4 expression in intestinal epithelium. RESULTS： Obstructive jaundice led to intestinal barrier failure demonstrated by significant portal and aortic endotoxemia. Claudin-4 expression was significantly increased in the upper third of the villi in jaundiced rats and an upregulation of its lateral distribution was noted. Administration of BBS or NT restored claudin-4 expression to the control state and significantly reduced portal and aortic endotoxemia. CONCLUSION： Experimental obstructive jaundice increases claudin-4 expression in intestinal epithelium,which may be a key factor contributing to the disruption of the mucosal barrier. Gut regulatory peptides BBS and NT can prevent this alteration and reduce portal and systemic endotoxemia.

Neurotensin Receptor 1 (NTSR1) Overexpression in Breast Carcinomas Is Common and Independent of ER/PR/Her2 Expression

Neurotensin (NT) is a 13-amino acid peptide with trophic effects on some neoplasms. Its bioactivities are mainly mediated by neurotensin receptor 1 (NTSR1). Both NT and NTSR1 were found to be upregulated in breast cancer. NT/NTSR1 thus becomes a potential therapeutic target. We studied whether any correlation exists between the expression of NTSR1 in breast carcinomas and the expression of ER, PR, and Her2. A total 85 cases of invasive ductal (62) and lobular (23) breast carcinomas were studied. Based on their ER/PR profiles, the ductal carcinomas (DCs) were subcategorized into ER+/PR+ (21), ER+/PR﹣ (20), and ER﹣/PR﹣ (21). All of the lobular carcinomas (LCs) were ER+/PR+. 21.57% of all DCs and 5.56% of LCs were Her2 positive. 77.78% of ER﹣/PR﹣ DCs were also Her2 negative (triple negative). The expression of NTSR1 was detected by immunohistochemistry and was semiquantitated (as negative, 1+, 2+, 3+). Both 2+ and 3+ were collectively defined as overexpression. The expression of NTSR1 was weak and focal in non-neoplastic mammary epithelial cells. It is increased in 74.19% of DCs (80.95% in ER+/PR+, 75% in ER+/PR﹣, and 66.67% in ER﹣/PR﹣ group), and in 95.65% of LCs. The overexpression of NTSR1 is similar between ER+ DCs and ER﹣ DCs (75% vs 66.67%, p > 0.05) as well as between PR+ DCs and PR﹣ DCs (80.95% in ER+/PR+ DCs vs 75% in ER+/PR﹣ DCs, p > 0.05). And it was seen in 77.78% of Her2+ DCs, 78.38% of Her2﹣ DCs, 94.12% of Her2﹣ LCs, and 78.57% of triple negative DCs. Overall, NTSR1 is commonly overexpressed in both ductal and lobular breast carcinomas and is independent of the ER/PR/Her2 profiles of the tumors. The present data supports the potential benefit of developing NTSR1 blockers in the adjuvant therapy of breast carcinomas, particularly for those “triple negative” tumors.

Effect of bombesin and neurotensin on gut barrier function in partially hepatectomized rats

AIM： To investigate the effect of regulatory peptides bombesin （BBS） and neurotensin （NT） on intestinal barrier function in partially hepatectomized rats. METHODS： Ninety male Wistar rats were randomly divided into five groups： Ⅰ （n = 10）： controls, Ⅱ （n = 20）： sham operated, Ⅲ （n = 20）： partial hepatectomy 70% （PHx）, Ⅳ （n = 20）： PHx＋BBS （30 μg/kg/d）, Ⅴ （n = 20）： PHx＋NT （300 μg/kg/d）. Groups IV and V were treated for 8 days before PHx and 48 h post surgery. At the end of the experiment, on day 10, intestinal barrier function was assessed by measuring endotoxin concentrations in portal and aortic blood. Tissue sections of the terminal ileum were examined histologically and villus density, mucosal thickness, mitotic activity and apoptosis in crypts were assessed. In addition, ileal mucosa was analyzed for DNA and protein content and microbiological analysis was performed in cecal contents. To estimate intestinal oxidative stress, lipid peroxidation was determined on tissue homogenates from terminal ileum. RESULTS： BBS or NT administration significantly reduced portal and systemic endotoxemia observed 48 h after partial hepatectomy. In hepatectomized rats （group Ⅲ）, a trend towards induction of mucosal atrophy was observed, demonstrated by the reduction of villus density, mucosal thickness, protein content and significant reduction of DNA, while these alterations were reversed by regulatory peptides administration. This trophic effect of BBS and NT was accompanied by induction of mitoses above control levels and a significant reduction of apoptosis in intestinal crypts. Intestinal lipid peroxidation was found significantly lower in PHx group and regulatory peptides exerted an antioxidant action, further decreasing this parameter of oxidative stress. The ：bacterial population of E. coli and aerobic Gram （＋） cocci was increased in cecal content of hepatectomized rats, while this parameter was not affected by the administration of BBS or NT. CONCLUSION： Gut regulatory peptides BBS and NT improve intestinal barrier function and reduce endotoxemia in experimental partial hepatectomy. This effect is, at least in part, mediated by their trophic, antiapoptotic, mitogenic, and antioxidant effect on the intestinal epithelium. This observation might be of potential value in patients undergoing liver resection.

Effects of acute brain injury on the contents of neurotensin in brain areas,pituitary gland and plasma in rats

The changes of immunoreactive neurotensin(ir-NT)contents in the brain areas,pituitary gland and plasma in the traumatized rats were observed in the present study.The results of radioimmunoassay exhibited significant changes of the ir-NT contents inthe hypothalamus,pituitary gland,plasma,injured tissue,hippocampus,central gray andspinal cord in the posttraumatic rats at different intervals.A predominant characteristicsof the changes of ir-NT levels in the brain areas,pituitary gland and plasma was thedramatical decrease at various times except for the hypothalamus,central gray andhippocampus with biphasic alterations.The ir-NT contents in the frontal cortex andpons-medulla also displayed changes to different extent under the acute craniocerebraltrauma condition.These results suggest that NT may play a role in the pathophysiologyof traumatic head injury.

Pleiotropic effects of bombesin and neurotensin on intestinal mucosa: Not just trefoil peptides

Bombesin and neurotensin are neuropeptides which exert a wide spectrum of biological actions on gastrointestinal tissues influencing intestinal growth and adaptation, intestinal motility, blood flow, secretion, nutrient absorption and immune response. Based mainly on their well-established potent enterotrophic effect, numerous experimental studies investigated their potential positive effect on the atrophic or injured intestinal mucosa. These peptides proved to be effective mucosa-healing factors, but the potential molecular and cellular mechanisms for this action remained unresolved. In a recently published study (World J Gastroenterol 2008; 14(8): 1222-1230), it was shown that their protective effect on the intestine in experimentally induced inflammatory bowel disease was related to anti-inflammatory, antioxidant and antiapoptotic actions. These results are in close agreement with our previous studies on jaundiced and hepatectomized rats that showed a regulatory effect of bombesin and neurotensin on critical cellular processes such as enterocyte' proliferation and death, oxidative stress and redox equilibrium, tight junctions' formation and function, and inflammatory response. The pleiotropic effects of bombesin and neurotensin on diverse types of intestinal injury may justify their consideration for clinical trials.

Clinical Significance and Detection of Neuro-Peptide and Neurotensin in Patient s with Brain Glioma

Objective To investigate the change of neuropeptide Y(NPY)and neurotens in(NT)in pqtients with brain glioma.Method The concentration of NPY and NT in an d around brain glioma tissue and plasma were detected with inequilibrant radio－ imunology method.Result NPY concentrqtion in brain glioma tissue was obviously h igher than that in tissue around the tumor(P<0.01).The Concentration of NT in br ain glioma tissue was obviously higher that in tissue around the glioma(P<0.01). Conclusion Detection of NPY and NT in brain gliom aprovides basis for further st udy on brain glioma and explainning clinical and imaginal symjptom of brain glio ma.

Ameliorative effects of bombesin and neurotensin on trinitrobenzene sulphonic acid-induced colitis,oxidative damage and apoptosis in rats

AIM:To investigate the effects of bombesin (BBS) and neurotensin (NTS) on apoptosis and colitis in an ulcerative colitis model. METHODS:In this study, a total of 50 rats were divided equally into 5 groups. In the control group, no colitis induction or drug administration was performed. Colitis was induced in all other groups. Following the induction of colitis, BBS, NTS or both were applied to three groups of rats. The remaining group (colitis group) received no treatment. On the 11th d after induction of colitis and drug treatment, blood samples were collected for TNF-α and IL-6 level studies. Malondialdehyde (MDA), carbonyl, myeloperoxidase (MPO) and caspase-3 activities, as well as histopathological findings, evaluated in colonic tissues. RESULTS:According to the macroscopic and microscopic findings, the study groups treated with BBS, NTS and BBS + NTS showed significantly lower damage and inflammation compared with the colitis group (macroscopic score, 2.1 ± 0.87, 3.7 ± 0.94 and 2.1 ± 0.87 vs 7.3 ± 0.94;microscopic score, 2.0 ± 0.66, 3.3 ± 0.82 and 1.8 ± 0.63 vs 5.2 ± 0.78, P < 0.01). TNF-α and IL-6 levels were increased significantly in all groups compared with the control group. These increases were significantly smaller in the BBS, NTS and BBS + NTS groups compared with the colitis group (TNF-α levels, 169.69 ± 53.56, 245.86 ± 64.85 and 175.54 ± 42.19 vs 556.44 ± 49.82;IL-6 levels, 443.30 ± 53.99, 612.80 ± 70.39 and 396.80 ± 78.43 vs 1505.90 ± 222.23, P < 0.05). The colonic MPO and MDA levels were significantly lower in control, BBS, NTS and BBS + NTS groups than in the colitis group (MPO levels, 24.36 ± 8.10, 40.51 ± 8.67 and 25.83 ± 6.43 vs 161.47 ± 38.24;MDA levels, 4.70 ± 1.41, 6.55 ± 1.12 and 4.51 ± 0.54 vs 15.60 ± 1.88, P < 0.05). Carbonyl content and caspase-3 levels were higher in the colitis and NTS groups than in control, BBS and BBS + NTS groups (carbonyl levels, 553.99 ± 59.58 and 336.26 ± 35.72 vs 209.76 ± 30.92, 219.76 ± 25.77 and 220.34 ± 36.95;caspase-3 levels, 451.70 ± 68.27 and 216.20 ± 28.17 vs 28.60 ± 6.46, 170.50 ± 32.37 and 166.50 ± 30.95, P < 0.05). CONCLUSION:The results of this study suggest BBS and NTS, through their anti-inflammatory actions, support the maintenance of colonic integrity and merit consideration as potential agents for ameliorating colonic inflammation.

Interferon beta(IFN-β) treatment exerts potential neuroprotective effects through neurotrophic factors and novel neurotensin/neurotensin high affinity receptor 1 pathway

Multiple sclerosis（MS）is a chronic autoimmune disease of the central nervous system（CNS）characterized by coexisting processes of inflammation,demyelination,axonal neurodegeneration,and gliosis.It is the most common disabling neurological disease in young adulthood.

脑血管病患者血浆神经肽Y和神经降压素浓度的测定及意义研究

目的 研究脑血管病患者在缺血和出血状态下,血浆神经肽Y(NPY)和神经降压素(NT)含量与脑血管病的关系。方法 用放射免疫方法测定脑血管病患者缺血、出血状态下NPY和NT含量。结果 出血性脑血管病患者血浆神经肽Y较对照组有显著提高。缺血性脑血管病患者血浆神经肽Y较对照组无显著差异。脑出血患者的血浆NT含量较正常对照组显著升高,脑梗死患者的血浆NT含量较正常对照组显著降低。结论 出血性脑血管病患者血浆神经肽Y和NT均升高且随病情的好转而降低。缺血性脑血管病患者血浆NT含量降低,且随病情的好转而升高,与血浆神经肽Y无关。

肠易激综合征患者血浆脑肠肽水平的变化

背景:脑肠肽作为一类具有神经递质和激素双重功能的小分子多肽,在肠易激综合征(IBS)的发病机制中起重要作用。目的:研究血管活性肠肽(VIP),神经肽Y(NPY)和神经降压素(NT)水平在IBS患者血浆中的变化及其临床意义。方法:根据RomeⅡ标准纳入IBS患者36例,其中腹泻为主型IBS(D-IBS)24例,便秘为主型IBS(C-IBS)12例,同时纳入正常对照者10名。采用放射免疫测定分别检测受试者血浆VIP、NPY和NT水平。结果:D-IBS患者血浆VIP水平显著高于正常对照组(P<0.05),而C-IBS患者血浆VIP水平与正常对照组比较无显著差异(P>0.05);D-IBS和C-IBS患者血浆NPY水平均显著低于正常对照组(P<0.05和P<0.01),其中C-IBS患者又显著低于D-IBS患者(P<0.05);D-IBS和C-IBS患者血浆NT水平均显著高于正常对照组(P<0.05),但两亚型间比较无显著差异(P>0.05)。结论:IBS患者血浆脑肠肽水平与腹泻或便秘症状有一定的联系,表现为D-IBS和C-IBS患者的血浆NT水平均显著升高,而NPY和VIP水平因IBS亚型的不同而有差异。脑肠肽作为调节胃肠运动功能和感觉功能的重要因素,可能与IBS的发生、发展有必然的内在联系。

催产素、精氨酸加压素、促肾上腺皮质激素释放激素、神经肽Y、神经降压肽、P物质及亮氨酸脑啡肽免疫阳性纤维在大鼠结合臂旁核的分布

应用免疫细胞化学 ABC 技术观察了催产素、精氨酸加压素、促肾上腺皮质激素释放激素、神经肽 Y、神经降压肽、P 物质及亮氨酸脑啡肽免疫反应阳性纤维在大鼠结合臂旁核中的分布。催产素阳性纤维稀少,分布于腹外侧亚核、外外侧亚核、背外侧亚核及外外侧亚核与背外侧亚核之间的移行区。加压素阳性纤维亦甚为稀少,分布于腹外侧亚核、背外侧亚核、外外侧亚核与极外侧亚核.促肾上腺皮质激素释放激素阳性纤维分布于尾侧部臂旁核腰区、外外侧亚核腹内侧部、极外侧亚核、背外侧亚核、中央外侧亚核、内外侧亚核及臂旁内侧核。神经肽 Y 阳性纤维大多为串珠状的终末祥结构,分布于尾侧部腹外侧亚核、背外侧亚核、外外侧亚核背外侧部及外内侧亚核,在上外侧亚核、结合臂背内侧端背侧及臂旁内侧核腹侧部也有少量分布.神经降压肽阳性纤维分布于尾侧部臂旁核腰区、背外侧亚核、背外侧亚核与外外侧亚核之间的移行区、外外侧亚核、外内侧亚核及中吻部臂旁内侧核腹侧部。P 物质及亮氨酸脑啡肽阳性纤维分布于所有的臂旁外侧核诸亚核及外内侧亚核。

保留NAC皮下腺体切除加包裹假体结合TiLoop 补片重建术治疗乳腺癌疗效分析

目的探讨保留乳头乳晕复合体(NAC)皮下腺体切除加包裹假体结合TiLoop补片重建治疗方案治疗乳腺癌的优势。方法选取南阳市中心医院乳腺外科2021年5月~2022年12月收治的70例乳腺癌患者,随机分为观察组和对照组,35例,观察组采用保留NAC切除加包裹假体结合TiLoop补片重建治疗方案,对照组采用切除乳房组织及其周围正常组织的改良根治术治疗方案,比较两组患者的临床效果、术后并发症、手术指标、神经降压素受体1(NTSR1)、嗜铬粒蛋白A(CgA)水平。结果观察组总有效率为94.29%,高于对照组(74.29%);术后并发症发生率为5.71%,明显低于对照组(25.71%),差异均有统计学意义(P<0.05);观察组术中出血量、手术时间、术后拔管时间、住院时间均优于对照组(P<0.05),而前哨淋巴结阳性率和住院时间两组比较无统计学差别。观察组患者术后6个月NTSR1(15.9±3.4)ng/mL、CgA(27.3±4.0)ng/mL,对照组分别为(13.8±2.6)ng/mL、(35.1±6.2)ng/mL,差异有统计学意义(P<0.05)。结论保留NAC皮下腺体切除加包裹假体结合TiLoop补片重建治疗方案是一种安全有效的乳腺癌手术方式,能够提高患者的临床效果,减少术后并发症,改善神经内分泌功能,值得临床推广应用。

高血压病患者血浆神经降压素和神经肽Y水平的临床意义

目的 :探讨高血压病患者血浆神经降压素 (neurotensin,NT)和神经肽 Y (neuropeptide Y,NPY)变化的临床意义。方法 :用放射免疫法测定了我院高血压病人 6 0例的 NT、 NPY。结果 :对照组 NT、 NPY分别为 74 .3± 2 6 .5、 145.1± 2 4 .2 pg/ ml,明显低于高血压 期病人 (135.8± 17.4、 170 .2± 2 7.4 pg/ ml) ,P<0 .0 1,0 .0 5。结论 :NT、

Control of Emotion and Wakefulness by Neurotensinergic Neurons in the Parabrachial Nucleus

The parabrachial nucleus(PBN)integrates interoceptive and exteroceptive information to control various behavioral and physiological processes including breathing,emotion,and sleep/wake regulation through the neural circuits that connect to the forebrain and the brainstem.However,the precise identity and function of distinct PBN subpopulations are still largely unknown.Here,we leveraged molecular characterization,retrograde tracing,optogenetics,chemogenetics,and electrocortical recording approaches to identify a small subpopulation of neurotensin-expressing neurons in the PBN that largely project to the emotional control regions in the forebrain,rather than the medulla.Their activation induces freezing and anxiety-like behaviors,which in turn result in tachypnea.In addition,optogenetic and chemogenetic manipulations of these neurons revealed their function in promoting wakefulness and maintaining sleep architecture.We propose that these neurons comprise a PBN subpopulation with specific gene expression,connectivity,and function,which play essential roles in behavioral and physiological regulation.

福辛普利对高血压病患者血浆神经肽Y及神经降压素的影响

目的 :观察高血压病患者用福辛普利治疗前后血浆神经肽 Y( NPY)、神经降压素 ( NT)含量的变化 ,探讨它们在高血压病发病中的作用及福辛普利对其影响。方法 :采用放射免疫分析法对 46例高血压病患者福辛普利治疗前后血浆 NPY及 NT水平进行测定 ,并与正常对照组进行对比分析。结果 :高血压病患者治疗前的基础血浆 NPY水平显著高于对照组 ,而 NT水平显著较对照组为低。高血压患者经福辛普利治疗后 ,在收缩压与舒张压均明显降低的同时 ,NPY水平明显下降。结论 :NPY及 NT活性改变可能在高血压的发生发展中起一定作用 ,福辛普利的降压作用可能有减少 NPY分泌因素的参与。

神经降压素抗实验性胃溃疡作用初步探讨

目的探讨神经降压素(neurotensin,NT)在大鼠脑内对应激性胃溃疡的影响及机制.方法选择健康雄性Wistar大鼠122只,用脑室微量注射NT等和放射免疫检测方法,观察中枢内、外源性NT对大鼠束缚加水浸诱导的应激性胃溃疡的影响.结果在大鼠应激性胃溃疡产生的同时,其血浆内神经降压素样免疫活性物(NT-IR)的含量明显减少[(162.86±34.25)pg/mg vs(221.54±31.82)pg/mg,P＜0.05],而下丘脑、中脑、脑桥、延脑和垂体中NT-IR含量则明显升高[下丘脑:(127.66±9.61)pg/mg vs(74.34±19.63)pg/mg;中脑:(52.59±3.25)pg/mg vs(8.74±2.25)pg/mg;脑桥:(26.99±2.30)pg/mgvs(7.80±2.24)pg/mg;延脑:(49.56±4.17)pg/mg vs(17.26±6.55)pg/mg;垂体:(18.97±3.24)pg/mg vs(5.42±1.25)pg/mg;P＜0.01)];侧脑室注射抗NT血清后,大鼠应激性胃溃疡的产生明显加重(溃疡指数:102.50±11.45 vs 91.38±9.12,P＜0.05);侧脑室微量注射NT,大鼠应激性胃溃疡的产生明显减轻,且呈明显的量效依赖关系(溃疡指数:5μg NT:82.25±7.69;10μg NT:76.99±7.71;20μg NT:50.38±13.13;30μg NT:11.25±4.65 vs 86.00±6.48,P＜0.05～0.01);经皮下注射消炎痛后,侧脑室注射NT,NT的胃粘膜细胞保护作用消失(溃疡指数:86.00±11.61 vs 88.80±12.88,P＞0.05).结论大鼠中枢内、外源性NT对胃粘膜细胞具有保护作用,该保护作用可能与前列腺素的合成有关.

大鼠脊髓后角内神经降压素对一级传入C纤维突触前抑制效应的形态学证据(英文)

本研究的目的是为了揭示大鼠脊髓后角内的神经降压素是否对一级传入 C纤维进行突触前调节。荧光显微镜下观察到 ,在脊髓 ～ 层内 ,神经降压素样免疫反应性 (NTL I)的分布与来源于西非单豆素的同工凝集素 - B4( - B)的结合位点到分布有部分重叠。在共聚焦激光扫描显微镜下进一步观察显微镜下 ,在蛛网膜下腔注射辣椒素的大鼠脊髓后角浅层内 ,一些 NTL I阳性终末与变性终末形成突触性和 /或非突触性接触。以上结果表明 ,NT可通过轴轴突触和 /或非突触性轴轴接触的一级传入 C纤维的传入进行突触前抑制。此外 ,脊髓后角内还存在变性终末与含 NTL I树突形成的轴树突触。

女性系统性红斑狼疮患者神经肽Y、神经降压素的检测及其意义

目的:探讨女性系统性红斑狼疮(SLE)患者血浆中神经肽Y和神经降压素水平的变化及其意义。方法:采用放射免疫分析法对30例女性SLE患者及20例正常对照血浆中神经肽Y、神经降压素水平进行检测。结果:女性SLE患者血浆中神经肽Y水平升高,神经降压素水平降低,二者与对照组相比,差异有显著性(P<0.01);与病情非活动期相比,病情活动期SLE患者神经肽Y水平显著升高、神经降压素水平显著降低,差异有显著性(P<0.01),治疗3个月后,二种物质的水平趋于正常,与对照组相比,差异无显著性(P>0.05)。结论:女性SLE患者血浆中神经肽Y和神经降压素水平的变化可能与SLE的发病有关。

大鼠脊髓背角向丘脑和外侧臂旁核的神经降压素能投射

本研究应用荧光金(FG)逆行追踪结合神经降压素(NT)免疫荧光组织化学染色的双标记技术,观察了大鼠脊髓背角向丘脑(TH)和外侧臂旁核(LPb)的NT能投射。将FG注入一侧TH或LPb后,FG逆标神经元主要见于脊髓背角的I层;NT阳性神经元主要分布于脊髓背角的I层、II层外侧部及II层内侧部与III层交界处;脊髓背角I层内可观察到FG逆标记并呈NT阳性的双标记神经元。上述结果表明脊髓背角I层的NT阳性神经元向TH和LPb投射,提示脊髓背角I层内的NT阳性神经元可能向TH和LPb传递伤害性信息。