The inhibitory receptor superfamily: potential relevance to atopy

The role of inhibitory receptor superfamily (IRS) members in the pathophysiology of atopy is still largely unexplored but the past year or so has brought at least three important advances in the understanding of IRS member function: first, several targets of an inositol-phosphatase-dependent inhibitory signaling pathway utilized by some IRS members were identified; second, there is accumulating evidence from murine models supporting the importance of inhibitory Fc gamma receptors in modulating immune-complex-mediated inflammation; third, the inhibitory signaling capability of several previously identified candidate IRS members--including several expressed on cell types implicated in atopy and allergic reactions--has been demonstrated.     

Immunohistochemical localization of receptors for progesterone and oestradiol-17 beta in the implantation site of the rhesus monkey

The aim of the present study was to examine the cellular basis of the involvement of oestradiol and progesterone in blastocyst implantation in the primate. To this end, the cellular distribution of receptors for oestradiol (ER) and progesterone (PR) in fetal trophoblast cells and in endometrial compartments of timed lacunar (pre-villous) and villous stages of placentation in primary implantation sites collected on days 13-22 of gestation were investigated in rhesus monkeys. Both in pre-villous stage tissue and in villous stage tissue, cytotrophoblast cells and syncytiotrophoblast cells and other trophoblast derived cells were PR positive, while they were generally ER negative. Maternal endometrial cells were ER negative, while epithelial cells, stromal cells and vascular endothelial cells in maternal endometrium showed heterogeneous staining patterns for PR depending on their relative location; these patterns, however, correlated well with glandular hyperplasia and differentiation, stromal-decidual transformation and vascular response seen during blastocyst implantation.     

恶性肿瘤放疗前后血清可溶性白细胞介素2受体含量变化的临床意义

目的　探讨血清可溶性白细胞介素２ 受体（ｓ Ｉ Ｌ２ Ｒ）水平与恶性肿瘤患者的病期及疗效的关系。方法　采用双抗体夹心 Ｅ Ｌ Ｉ Ｓ Ａ 法检测１５９ 例恶性肿瘤患者放疗前后血清ｓ Ｉ Ｌ２ Ｒ 水平。结果　恶性肿瘤患者放疗前血清ｓ Ｉ Ｌ２ Ｒ 水平明显高于正常对照组（ Ｐ＜ ００５）;放疗后血清ｓ Ｉ Ｌ２ Ｒ 水平明显低于放疗前（ Ｐ ＜ ０００１）;晚期患者（Ⅲ＋ Ⅳ期）不论是放疗前或放疗后 ｓ Ｉ Ｌ２ Ｒ 水平均明显高于早期患者（Ⅰ＋ Ⅱ期）（ Ｐ ＜ ００５）;各类恶性肿瘤之间血清ｓ Ｉ Ｌ２ Ｒ 水平无显著性差异（ Ｐ ＞００５）。结论　ｓ Ｉ Ｌ２ Ｒ水平在各种恶性肿瘤中的表达无特异性;检测恶性肿瘤患者ｓ Ｉ Ｌ２ Ｒ 放疗前后水平,是对病情估计和治疗疗效评价的一项参考指标。     

Kentanserin对大鼠心肌缺血 再灌注损伤的影响

为探讨５ ＨＴ２受体与心肌缺血 再灌注损伤的关系,观察５ ＨＴ２受体阻断剂ｋｅｎｔａｎｓｅｒｉｎ对心肌缺血 再灌注大鼠室颤及左室内压＋ｄｐ／ｄｔｍａｘ及－ｄｐ／ｄｔｍａｘ的影响。结果表明,ｋｅｎｔａｎｓｅｒｉｎ可拮抗缺血性心功能障碍和再灌室颤。提示５ ＨＴ２受体参与了缺血性心功能障碍和再灌室性心律失常的发生。     

表皮生长因子受体在结直肠癌的表达及临床病理意义

目的 探讨表皮生长因子受体（ＥＧＦＲ）在结直肠癌中的表达情况及其与病理特征和预后的关系。方法 采用免疫组化ＳＰ法对有随访资料的５５例结直肠癌标本进行ＥＧＦＲ检测,结合图像分析观察判定结果。结果 结直肠癌ＥＧＦＲ表达的阳性率为６９．０９％,ＥＧＦＲ的表达与肿瘤的浸润深度,淋巴结转移,Ｄｕｋｅ‘ｓ分期和生存期有关,而与分化程度无关。结论ＥＧＦＲ在结直肠癌的扩散和转移过程中可能产生一定的作用,并可作为预     

无排卵综合征大鼠肝脏、卵巢和肾上腺胰岛素受体的鉴定

目的探讨高胰岛素高雄激素无排卵综合征的发病机制。方法采用放射配体结合分析法首次对雄激素致高胰岛素高雄激素无排卵大鼠（ＡＳＲ）肝脏、卵巢和肾上腺的的胰岛素受体作了鉴定,并与正常对照大鼠进行比较。结果ＡＳＲ肝脏、卵巢和肾上腺胰岛素受体的数目及亲和力均与正常大鼠相似。结论ＡＳＲ不存在受体水平的胰岛素拮抗。     

抗人尿激酶受体单克隆抗体的制备与鉴定

目的　制备抗人尿激酶受体单克隆抗体,为今后ｕＰＡＲ 病理生理作用及临床意义的研究提供新的手段。方法　利用杂交瘤技术,用经ＰＭＡ刺激的Ｕ９３７ 细胞与可溶性尿激酶受体（ｓｕＰＡＲ）免疫Ｂａｌｂ／ｃ 小鼠,与ＳＰ２／０ 细胞融合。结果　获得国内第１ 组４ 株抗人尿激酶受体（ｕＰＡＲ）单抗,分别命名为ＳＺ－ ９８、ＳＺ－ ９９ 、ＳＺ－ １００ 、ＳＺ－ １０１。结论　４ 株单抗均能与ｕＰＡＲ 特异性结合,能与Ｕ９３７ 细胞及经ＰＭＡ作用的Ｋ５６２ 细胞反应。ＳＺ－ １０１ 与国外抗ｕＰＡＲ单抗３９３６ 有相同的ｕＰＡＲ 结合位点;而ＳＺ－９８、ＳＺ－ ９９ 与ＳＺ－ １００ 在ｕＰＡＲ上有不同的结合位点     

大鼠纹状体边缘区神经元中乙酰胆碱激活的离子通道特性

用细胞贴附式膜片钳技术研究了急性分离的新生SD大鼠纹状体边缘区神经元中乙酰胆碱激活的离子通道的特性。发现通道有25PS和60PS两种电导状态,25PS通道为主要类型,因此,本文主要报道25PS通道的特性。ACh激活的单通道电流为快速内向电流,随着超极化程度增加而增加,反转电位约为0mV。通道开放具单个开放和簇状开放,其开放时间均可权指数拟和,单个开放时间常数为0．29ms和1.84ms,簇状开放时间常数为1．96ms和18.24ms。平均关闭时间也可双指数拟和,两个时间常数为1．70ms和54．00ms。通道开放概率为0．012,未表现出电压依赖性。提示纹状体边缘区神经元上存在乙酸胆碱受体离子通道。根据特性证实为烟碱型离子通道。     

Exercice physique, carence estrogénique, monoxyde d'azote et remodelage osseux

Summary

Objectives

The aim of this paper is to emphasize the possible relationships established between estrogens and physical exercise and concerning bone metabolism. Nitric oxide (NO) might play an important role in such relationships.

Topics

Cellular metabolism of NO, as well as NO effects upon osteoblasts and osteoclasts have been summarized. Several studies indicate that NO deficiency might be implicated in various vascular diseases observed in post-menopausal women. Other works also indicate that NO deficiency induced by cessation of ovarian activity might be responsible for osteopenia associated with this condition. Thus, decreased production of NO would be responsible both for post-menopausal osteoporosis as well as for osteopenia sometimes observed in amenorrheic athletes. Moreover osteoblastic response to mechanical stimulation might implicate estrogenic receptor(s). The role of these receptors in the regulation of NO synthesis is still unknown.     

Somatostatin receptor scintigraphy during treatment with lanreotide in patients with neuroendocrine tumors

To investigate possible changes in somatostatin receptor expression during treatment with high dose lanreotide, eight patients with neuroendocrine tumors were investigated by [¹¹¹In-DTPA-D-Phe¹]-octreotide scintigraphy before and during treatment. The spleen-to-background ratio decreased in all patients, whereas tumor-to-background ratio revealed a heterogeneous pattern with an average increase of 50% (−79% to +1,087%). This finding indicates that lanreotide treatment may influence the binding of radioactively labeled somatostatin to the spleen, while changes in the binding to functioning somatostatin receptors in tumor cells are more complex and not clearly related to treatment.