沿脑-肠轴探讨肠易激综合征的可能机制

肠易激综合征(IBS)是在特殊介质的基础上,以神经-内分泌-免疫系统为中介,以社会心理因素刺激为扳机而触发的心身疾病,迄今发病机制尚不明朗,内脏高敏感性作为其主要的最广为接受的病理生理机制备受瞩目,目前认为各种因素导致的外周和(或)中枢致敏是其重要的发病机制。本文综合近年来国内外学者的研究成果,从神经-内分泌-免疫网络失调这一角度探讨IBS患者内脏高敏感性的外周和中枢机制。

BIO-INSPIRED SELF-ADAPTIVE MANUFACTURING SYSTEM CONTROL ARCHITECTURE

Future manufacturing systems need to cope with frequent changes and disturbances, therefore their control architectures require constant adaptability, agility, stability, self-organization, intelligence, and robustness. Bio-inspired manufacturing system can well satisfy these requirements. For this purpose, by referencing the biological organization structure and the mechanism, a bio-inspired manufacturing cell is presented from a novel view, and then a bio-inspired self-adaptive manufacturing model is established based on the ultra-short feedback mechanism of the neuro-endocrine system. A hio-inspired self-adaptive manufacturing system coordinated model is also established based on the neuro-endocrine-immunity system （NEIS）. Finally, an example based on pheromone communication mechanism indicates that the robustness of the whole manufacturing system is improved by bio-inspired technologies.

Clinico-pathologic significance of neuroendocrine cells in gastric carcer tissue

AIMS To elucidate the biological and clinicopathological signifi- cance of neuroendocrine(NE)cells in gastric carcinoma(GC). METHODS One hundred and eighty-nine cases of various histo- logical types of GC were observed using light microscopy, histochemistry,immunohistochemistry and electron microscopy. Of them 127 patients were followed up. RESULTS Chromogranin A(CgA)positive GC was demonstrat- ed in 85 cases(45.0%).The typos of NE cells in GC were probed using 9 kinds of hormone antibodies 49 cases(67.2%) contained more than one hormone.NE cells were found more often in poorly differentiated GC than in well differentiated ones(P<0. 01).Expression of some kinds of hormone Was relative to the dif- ferentiation and histological types of GC.BOM,CT(P<0.01) GAST and 5-HT(P<0.05)were more expressed in poorly differ- entiated cases than in well defferentiated ones.Nineteen cases of the matastatic foci in regional lymph nodes were found to have CgA positive cancer cells.The presence of HCG in matastatic lymph nodes was more often observed than that of other hormone (P<0.01).The survival rate of patients with NE positive GC was 38.9% and negative GC 52.7%.Five of 7 patients(71. 4%)with somatostatin positive GC still survived at follow up of 33-66 months,but 4 patients with HCG positive GC died in 12-29 months. CONCLUSIONS The NE cells occur more frequently in poorly differentiated GC.Certain hormones appear to be related to the metastasis and prognosis.

COMMENTS ON THE HOLISTIC ACTION OF ACUPUNCTURE IN VIEW OF ITS INFLUENCE ON NERVE-ENDOCRINE-IMMUNE NETWORK

In the present paper, the author makes some comments on the holistic action of acupuncture from the regulative effect on the nerve-endocrine-immune network, and the close relationship between the nerve-endocrine-immune network and the meridian-collateral system of TCM. The wholism concept of TCM refers to the organism being an integrated entirety, and the regulatory effect of acupuncture on functional activities of the organism relies on the integral connection of the acupoint-meridian-collateral-zangfu-organ system. When stimulated with acupuncture, the human body will brings its potential force into full play in preventing and treating diseases.

从脑肠关系认识气机紊乱的实质

人体气机圆运动是以"肾水升、心火降"为根本,肝脾助肾水以温升,上济心阴,肺胃助心火以凉降,下温肾阳,中焦脾胃是气机升降的枢纽。肝脾相关的现代生物学基础为脑-肠轴失衡。脑-肠轴是以神经-内分泌-免疫调节网络为核心,在这个网络中多种神经递质、神经肽、激素以及免疫因子所介导的相互作用与调节,保持着该网络在整体水平上构成和维持机体内环境及生理功能的平衡和稳定。由此推测中医学的"气"可能与神经-内分泌-免疫调节网络功能有关,气机紊乱的实质即该网络功能失调。

Angiogenic markers endoglin and vascular endothelial growth factor in gastroenteropancreatic neuroendocrine tumors

AIM:To investigate the expression and potential prognostic role of vascular endothelial growth factor(VEGF) and endoglin in gastroenteropancreatic neuroendocrine tumors(GEP-NETs) . METHODS:Microvessel density(MVD) in GEP-NETs was evaluated using endoglin and CD31 immunohistochemistry.In addition,tissue levels of endoglin and VEGF were determined in homogenates by ELISA. RESULTS:Endoglin was highly expressed on tumor endothelial cells.CD31 MVD in GEP-NETs was significantly higher compared to endoglin MVD(P<0.01) .Two-tofour-fold higher tissue levels of endoglin and VEGF were seen in tumors compared to associated normal tissue. This increased endoglin tissue expression in tumors was significantly related to tumor size(P<0.01) ,presence of metastases(P=0.04) ,and a more advanced tumor stage(P=0.02) ,whereas expression of VEGF was not. CONCLUSION:We suggest that endoglin is a potential marker to indicate and predict metastases,which might be useful in the post-resection therapeutic approach of patients with GEP-NETs.

Neuroendocrine gastric carcinoma expressing somatostatin: A highly malignant, rare tumor

Poorly differentiated gastric neuroendocrine carcinomas, although rare, deserve particular attention, as they are aggressive and have an extremely poor prognosis. In this report we describe a gastric neuroendocrine carcinoma with rapidly fatal outcome. Immunohistological staining of the resected specimens revealed that the tumor was an endocrine carcinoma. The tumor disclosed intense immunoreactivity to pan-neuroendocrine markers and diffuse somatostatin immunoreactivity. There were no psammoma bodies and no demonstrable association with yon Recklinghausen＇s neurofibromatosis. In the gastrointestinal tract, neuroendocrine tumors producing predominantly somatostatin have been described only in the duodenum. To the best of our knowledge, the present report is the second case report of a neuroendocrine gastric carcinoma expressing diffusely somatostatin as the only neuroendocrine regulatory peptide.

Clinicopathologic Observation of 6 Cases with Neuroendocrine Carcinoma of the Urinary Bladder

OBJECTIVE To discuss the pathologic characteristics and theprognosis of neuroendocrine carcinoma of the bladder(NECB)in order to assist in making a precise diagnosis and to effectivelytreat the disease.METHODS Clinicopathologic features of the 6 cases with NECBwere analyzed retrospectively.The personal data of the patientsand the pathologic and immunohistochemical characteristics ofthe tumor were investigated.The follow-up of these patients wasconducted over a time period ranging from 3 months to 9 years.RESULTS Transurethral resection of the bladder tumorwas performed in all 6 patients.Based on the results of thepathologic examination,4 of the cases were diagnosed as smallcell neuroendocrine carcinoma and the other 2 were diagnosedas atypical carcinoid tumor.On immunohistochemical stainingall tumors expressed neuroendocrine markers includingneuronspecific enolase(CD56),synaptophysin(Syn)andchromogranin(CgA).In patients receiving partial cystectomyfollowed by postoperative chemotherapy,relapse was found in 4of the 6 cases on follow up.CONCLUSION NECB is a rare entity and a tumor with highmalignant potential and characteristic pathologic features.Hematuria is the cardinal symptom of NECB.Metastasis mayoccur at an early stage and the prognosis of the disease is poor.Final diagnosis of NECB depends on histopathologic examinationand immunohistochemical assays.Surgical excision combinedwith radiotherapy and chemotherapy is considered an effectivetreatment.

Mechanical Stress Induces Neuroendocrine and Immune Responses of Sea Cucumber(Apostichopus japonicus)

Grading procedure in routine sea cucumber hatchery production is thought to affect juvenile sea cucumber immunologi- cal response. The present study investigated the impact of a 3-min mechanical perturbation mimicking the grading procedure on neuroendocrine and immune parameters of the sea cucumber Apostichopusjaponicus. During the application of stress, concentrations of noradrenaline and dopamine in coelomic fluid increased significantly, indicating that the mechanical perturbation resulted in a transient state of stress in sea cucumbers. Coelomocytes concentration in coelomic fluid increased transiently after the beginning of stressing, and reached the maximum in 1 h. Whereas, coelomocytes phagocytosis at 3 min, superoxide anion production from 3 min to 0.5 h, acid phosphatase activity at 0.5 h, and phenoloxidase activity from 3 min to 0.5 h were all significantly down-regulated. All of the immune parameters recovered to baseline levels after the experiment was conducted for 8 h, and an immunostimulation occurred after the stress considering the phagocytosis and acid phosphatase activity. The results suggested that, as in other marine invertebrates, neuroendocrine/immnne connections exist in sea cucumber A. japonicus. Mechanical stress can elicit a profound influence on sea cucumber neuroendocrine system. Neuroendocrine messengers act in turn to modulate the immunity fimctions. Therefore, these ef- fects should be considered for developing better husbandry procedures.

Research progress on regulations on nerve-endocrine-immune network by acupuncture

In order to explore the mechanism for the functions of acupuncture on nerve-endocrine-immune（NEI） network,authors carried out systematical analysis on the research progress of regulations on nerve-endocrine-immune network by acupuncture,and investigated current problems and future development tendency.It was found that NEI network was the biological basis for human body to maintain homeostasis and it utilized common medium for transmitting information,and the regulations by acupuncture may activate NEI network or its common medium.Science of acupuncture and moxibustion is the systematical science focusing on integrative regulations,and continuous development of system biology and omics techniques have enabled systematical assurance and comprehensive understanding of network regulatory effects and mechanisms by acupuncture to become new development tendencies.