羧基化多壁碳纳米管修饰电极伏安法测定多巴胺

目的 :研究用羧基化多壁碳纳米管修饰电极伏安法测定痕量多巴胺 (DA)的效果。方法 :采用涂布法制成羧基化多壁碳纳米管修饰电极 ;在pH =5 .4的KH2 PO4 Na2 HPO4缓冲溶液中 ,采用该修饰电极伏安法测定DA。结果 :该修饰电极对DA有着显著的电催化作用 ,与裸玻碳电极相比较 ,其灵敏度大大提高 ,在2 .0× 10 -7～ 6 .0× 10 -4mol/L浓度范围内 ,DA的氧化峰电流与浓度成良好的线性关系 ,检测限为 5 .0× 10 -8mol/L。将该修饰电极用于盐酸多巴胺针剂的测定 ,相对平均偏差为 1.4 % ,平均回收率为 99.2 %。结论 :该修饰电极响应快 ,灵敏度高 ,稳定性好 ,寿命长 ,适合于具有电活性生物分子的测定     

(E)-1-二苯甲基-4-[3-(3,4-二羟苯基)-2-丙烯基]哌嗪(Ⅰ)的合成及其SOD样活性测定

目的和方法：为了研究心血管类药物的构效关系，用二苯甲基哌嗪和咖啡酸为原料，经缩合、还原等反应制得标题物（Ｉ）；并通过黄嘌呤黄嘌呤氧化酶鲁米诺化学发光体系检测了其清除Ｏ·２自由基的作用．结果和结论：经元素分析、红外光谱和核磁共振谱测定，合成物（Ｉ）与结构相符，收率７２．５％；化学发光法检测显示出较强的ＳＯＤ样活性，具有较强的抗自由基作用．     

A protease inhibitor attenuates gastric erosions and microcirculatory disturbance in the early period after thermal injury in rats

The effects of camostat mesilate, a synthetic serine protease inhibitor on gastric microcirculation and active oxygen species generated by leucocytes from the gastric and jugular veins in the early period after thermal injury were assessed. Male Wistar rats were anaesthetized and a 30% full skin-thickness dorsal burn was inflicted. Camostat mesilate (100 mg/kg) was dissolved in distilled water and administered orally to rats 40 min before thermal injury (the camostat group). The control animals (the vehicle group) were administered distilled water orally. Rolling leucocytes as well as Monastral blue B deposits in venules were observed using in vivo microscopy. Active oxygen species were measured by chemiluminescence. Camostat mesilate decreased the total length of gastric erosion, venular deposits of Monastral blue B, and rolling of leucocytes in venules, and relatively increased luminol-dependent chemiluminescence activity generated by zymosan-stimulated leucocytes 15 min after thermal injury. These results suggest that serine proteases are involved in the formation of gastric erosions and gastric microcirculatory disturbance in the early period after thermal injury.     

Cardioprotective Effect of Succinate Against Ischemia/Reperfusion Injury

(Received for publication on Sept. 12, 1996; accepted on May 12, 1997)     

Effect of Shengmaisan（生脉散）on Lipid Peroxidation Damage in Acute Myocardial infarctionPatients

ＥｆｆｅｃｔｏｆＳｈｅｎｇｍａｉｓａｎ（生脉散）ｏｎＬｉｐｉｄＰｅｒｏｘｉｄａｔｉｏｎＤａｍａｇｅｉｎＡｃｕｔｅＭｙｏｃａｒｄｉａｌｉｎｆａｒｃｔｉｏｎＰａｔｉｅｎｔｓＬＵＢａｏ－ｊｉｎｇ（吕宝经）；ＲＯＮＧＹｅ－ｚｈｉ（荣烨之）；ＺＨＡＯＭｅｉ－ｈ...     

"Necklace olfactory glomeruli" form unique components of the rat primary olfactory system

A distinct subset of rat primary olfactory neurons was identified immunohistochemically by means of a polyclonal antibody against human placental antigen X-P2 (hPAX-P2), an incompletely characterized substance found in all estrogen-biosynthetic organs. The subset of olfactory receptor cells was distributed widely over the olfactory epithelium with some degree of concentration on the dorsocaudal walls of nasal subcavities. The subset formed unique "necklace olfactory glomeruli," which were composed of seven to nine solitary glomeruli located in the caudal end of the olfactory bulb. One of them was located in the "modified glomerular complex" reported to be involved in rat suckling behavior. The projectional patterns of the necklace olfactory system, albeit diffuse, indicated some degree of spatial correspondence between zones of olfactory epithelium and specific glomeruli. Axons emanating from neighboring cells can project to several glomerular loci. From the necklace olfactory system, an average of 150-200 receptor cells were estimated to converge onto a single necklace glomerulus.     

A Preliminary Study of Immunotherapy with a Monomethoxy Polyethylene Glycol Modified Honey Bee Venom Preparation

Monomethoxy polyethylene glycol (mPEG) modified honey bee venom (HBV) immunotherapy (IT) has been studied in 14 patients allergic to honey bee venom. Doses could be increased more rapidly and higher doses were reached compared to regular venom immunotherapy. No general side effects were seen, although large local swellings were found somewhat more often than with regular HBV. Most patients could easily be switched from the modified to the unmodified venom. Eight patients experienced and tolerated field stings. Skin testing showed a decreased allergenicity of the mPEG-HBV. The mean HBV-specific IgE level was below pre-treatment level already after only 6 weeks of IT. The HBV-specific IgG response was very good.     

Priming effect of RANTES on eosinophil oxidative metabolism

Background RANTES has been shown to possess chemotactic activity for eosinophils, which have also been considered to play a role in allergic inflammation through reactive oxygen species. Thus, in this study, we examined the effect of RANTES on radical oxygen products from eosinophils.
Methods Purified eosinophils by CD16-negative selection or an eosinophilic cell line (EoL-1) were incubated with or without RANTES (2.5 x 10⁻⁶). To the mixture of eosinophils and luminol, calcium ionophore (A23187) or opsonized zymosan (OZ) was added, and radical oxygen products were determined by luminol-dependent chemiluminescence for 600 s.
Results Eosinophil-mediated radical oxygen products of untreated eosinophils produced with A23187 gave a peak value of 14.09 + 2.40 (mean±SE, n = 12) relative light units (RLU) and an integrated value of 3232.20 + 513.09 RLU. However, with treatment with RANTES, a peak value of 18.66 + 2.40 RLU and an integrated value of 5301.05 ±561.02 RLU were obtained. Eosinophil oxidative metabolism-induced A23187 or OZ was apparently augmented by the preincubation with RANTES. In addition, the radical oxygen products of EoL-1 showed similar results.
Conclusions Thus, we concluded that RANTES may play an important role the pathogenesis of allergic inflammation through its involvement in eosinophil activation, as evidenced by oxygen products, as well as in selective eosinophil infiltration as selective eosinophil chemoattractant.     

The thymus as primary site for antigen-specific T suppressor cells in neonatally induced tolerance to bovine serum albumin

The ontogeny of antigen-specific T suppressor cells in thymus and spleen was analyzed in CBA/Ca mice which were rendered tolerant as neonates by subimmunogenic doses of bovine serum albumin (low-zone tolerance). Activity of T suppressor cells from those mice was assessed by an assay in which spleen cells from animals primed with fluorescein-conjugated human gamma globulin can be stimulated in vitro to produce IgG anti-fluorescein antibodies when cultured in the presence of fluorescein-conjugated bovine serum albumin. Carrier-specific T suppressor cells appear first in the thymus (day 10), and much later (day 30) in the spleen. The data are discussed in connection with the possible role of T suppressor cells during induction of tolerance in newborn mice.     

羧甲基变性半纤维素对小鼠免疫器官重量的影响

本文报告了羧甲基变性半纤维素(CMMH)对幼鼠及成鼠的胸腺、脾脏重量的影响。初步证明CMMH在一定浓度下不引起兔疫器官——胸腺和脾脏萎缩。该药与环磷酰胺合用时,对环磷酰胺所造成的胸腺、脾脏萎缩无相加、协同或拮抗作用。当成年小鼠接受抗原致敏和攻击后,该药虽能显著影响细胞免疫,但对胸腺和脾脏的重量无明显影响。