An in vitro study of nonadrenergic-noncholinergic activity on the cavernous tissue of mouse

The relaxant effects of electrical field stimulation (EFS) and exogenously applied acetylcholine (ACh) or acidified NaNO₂ (a-NaNO₂) were investigated in the isolated mouse corpus cavernosum precontracted with phenylephrine hydrochloride (PE). Tetrodotoxin (TTX) blocked the relaxant effects of EFS completely, whereas it had no effect on the responses to ACh or a-NaNO₂. Guanethidine and indomethacin failed to affect the electrically or ACh-induced relaxations. Atropine completely blocked the effect of ACh; however, it caused a slight reduction in the relaxation evoked by EFS.N ^G- Nitro-l-arginine (l-NOARG) reduced the effects of EFS and ACh significantly, but it was ineffective on the relaxations induced by a-NaNO₂. The inhibitory action ofl-NOARG was partly restored byl-arginine, but not byd-arginine. Methylene blue (MB) and hydroxocobalamin (HC) exhibited significant inhibition on the relaxations evoked by EFS, ACh and a-NaNO₂. Hydroquinone (HQ) reduced relaxation due to a-NaNO₂, but did not affect that of EFS and ACh. Our findings suggest that EFS-induced relaxations of mouse cavernosal tissue are mediated by a transmitter which probably resembles an organic nitrate.     

大段同种异体骨移植在四肢恶性骨肿瘤保肢术中的应用

目的分析大段同种异体骨移植在治疗四肢恶性骨肿瘤切除后骨缺损中的疗效。方法 :对 130例四肢骨肿瘤 ,切除范围以Enneking分期为原则 :异体骨移植术式分 :1/ 4关节、1/ 2关节、部分骨干、全骨段、全骨段 人工假体、1/ 2关节 自体带血管骨瓣 ;内固定分 :钢板 螺丝钉、螺丝钉、普通髓内钉、带锁髓内钉 ;疗效按Mankin提出的评定标准 ,将结果分 :优、良、中、差四等 ,差为不满意。结果 :随访 6～ 15 6个月 ,本组治疗满意率为 6 3.8% ,主要并发症是感染、骨折、骨不愈合 ,其发生率 39.2 % ,保肢率 76 .3%。结论 :大段同种异体骨移植 ,在治疗四肢恶性骨肿瘤切除后骨缺损方面 ,不失为一种有效可行的方法。其并发症发生与肿瘤外科分期、是否化疗、移植骨大小、受骨区软组织条件好坏、内固定各类有关。     

缺陷型精神分裂症神经系统软体征及其相关因素研究

目的 探讨缺陷型精神分裂症神经系统软体征及其相关因素。方法 将175例精神分裂症病人采用Carpenter提出的关于缺陷综合征的诊断标准划分为缺陷型（47例）、非缺陷型（128例），对其神经系统软体征进行评定，同时应用阴性症状评定量表（SANS）、阳性症状评定量表（SAPS）、简明智能评定量表（BIRS）、住院精神病人社会功能评定量表（SSSI）分别进行评定并进行相关分析。结果 缺陷型精神分裂症神经系统软体征与SANS、SSSI呈显著正相关，与智能百分比呈显著负相关。结论 缺陷型精神分裂症神经系统软体征与多种因素有关。     

一种拥有自主知识产权的国产可膨胀阴茎假体

勃起功能障碍是常见的男性疾病，部分ED患者在非手术治疗无效后，最终将植入阴茎假体进行治疗，且可获得满意的效果。本文简述这种疾病现状及其治疗方法，介绍一种拥有自主知识产权的国产阴茎假体的特征及其临床应用情况。     

关节镜下应用微骨折方法修复关节软骨缺损的实验研究及临床初步应用

目的探讨应用微骨折技术对全层关节软骨缺损修复的效果。方法20只大白兔随机分为两组，在其右股骨内髁先建立全层软骨缺损模型，实验组进行微骨折处理，对照组则不予特殊处理。分别在4周和8周各处死10只实验兔，作大体观察、病理学检查和修复组织厚度测量。临床上对68例全层关节软骨缺损进行随机分组：实验组35例，关节清理后应用微骨折技术进行处理；对照组33例，仅作关节清理术。结果对照组只有肉芽组织和瘢痕组织生长，仅边缘有少量软骨组织生长，实验组在4周时大部分为软骨组织生长，8周已全部被软骨组织修复。术后平均随访8．6个月，Lysholm评分实验组明显优于对照组。结论微骨折技术是一种有效的修复全层关节软骨缺损方法。     

阴囊皮瓣修复阴茎缺损的临床应用

目的探讨阴囊皮瓣修复阴茎大部分缺损的临床效果。方法对由不同原因引起阴茎缺损的17例患者，采用阴囊皮瓣进行修复。在阴囊根部两侧阴囊前动脉之间的无血管区剥离一腔隙，将延长后的阴茎海绵体经腔隙转移至阴囊皮瓣的下方，以包绕海绵体创面，皮瓣缝合后瘢痕在阴茎腹侧。结果切口均Ⅰ期愈合。术后随访患者1～9年，未出现皮瓣坏死现象，阴茎的外观及功能恢复较好。结论阴囊皮瓣的血运丰富、组织柔软、弹性好、伸缩性强，而且此手术切口隐蔽，是修复阴茎缺损较理想的皮瓣。     

以唇动脉为蒂的唇瓣修复中度和重度唇全层缺损

目的探讨中、重度全层唇缺损的修复方法.方法在缺损一侧或两侧(若缺损较大,一侧唇瓣不够用时)设计以唇动脉为蒂的唇瓣向缺损区推进转移修复全层唇缺损.若缺损较大,单纯用缺损两侧口唇组织仍不足以修复时,可将一侧唇瓣向外侧延伸绕过口角至另一侧上或下唇(根据缺损是在下唇或上唇),形成包括上下唇组织在内的大型唇瓣向缺损区推进修复缺损.若缺损为单纯的红唇缺损,唇瓣切口应沿唇弓设计.结果临床应用于67例,其中上唇38例,下唇29例.缺损最大水平宽度3.5 cm,最小1.6 cm.单纯红唇瓣20例,红白唇瓣47例.单侧唇瓣10例,双侧57例.所有唇瓣均全部存活,伤口Ⅰ期愈合,修复后的口唇丰满,外形满意.结论唇动脉血管恒定,唇瓣血供可靠,本法不仅能用于单纯红唇缺损的修复,还可广泛用于红、白唇同时缺损的修复,因是用同类组织修复,且组织量丰富,故术后能完全恢复口唇所特有的红、白唇结构及功能,是修复中、重度全层唇缺损的理想方法.     

耳廓复合组织瓣连续法修复鼻翼缺损

目的观察耳廓复合游离组织瓣连续法修复鼻翼缺损的疗效，以探讨鼻翼缺损的有效修复手段。方法耳廓复合游离组织瓣2次连续法修复鼻翼缺损7例，移植物面积0．5cm×0．7cm～0．8cm×1．2cm。结果7例耳廓复合游离组织瓣移植后全部成活。术后随访6～18个月，移植物无明显回缩，鼻外形满意。结论耳廓复合游离组织瓣连续移植修复鼻翼缺损，适合较严重鼻翼缺损，手术成功率高，术后鼻外形满意，双侧分次取材，耳廓外形双侧对称无畸形。     

NOD小鼠胸腺细胞TCR介导的信号通路缺陷

目的 进一步研究NOD小鼠T细胞应答改变机理。方法 用抗TCR抗体、ConA激活NOD小鼠胸腺细胞，分析TCR介导的信号通路的水平。结果 与Balb／c小鼠胸腺细胞相比，抗TCR抗体诱导的增殖应答较弱，与年龄及NOD胸腺CD4^ CD8^-和CD4^-CD8^ SP细胞有关；rIL-2能部分恢复对TCR抗体应答的缺乏。NOD小鼠对PMA IONO和PMA anti—TCR-mAb应答正常，但对anti-TCRmAb IONO应答缺乏。结论 与年龄有关的NOD小鼠胸腺细胞对TCR抗体应答的缺乏与T细胞激活时上游PKC信号通路的缺乏有关。     

No colocalization of immunoreactivities for VIP and neuronal NOS, and a differential relation to cGMP-immunoreactivity in bovine penile smooth muscle

The distribution of immunoreactivity (IR) for the neuropeptide vasoactive intestinal polypeptide (VIP) and neuronal nitric oxide synthase (nNOS) in the bovine retractor penis muscle (RP) and penile artery (PA) was studied by using two different methods. The distribution of these immunoreactivities was also compared with that of the immunoreactivity for cyclic guanosine monophosphate (cGMP). In both tissues the nerve fibers and terminals immunoreactive for VIP had a distribution that was completely different from that of the nerve fibers and terminals immunoreactive for nNOS. This contrasts with the previous observations in penile smooth muscle of other species. In the RP, as well as in the PA, many of the VIP-IR fibers were also immunoreactive for neurofilaments (NF), whereas the nNOS-IR fibers were consistently devoid of NF-IR. Stimulation with sodium nitroprusside, a nitric oxide donor, considerably increased cGMP-IR in the smooth muscle cells in both RP and PA, and in several nerve fibers in PA. Many of these cGMP-IR nerve fibers exhibited nNOS-IR, whereas none of them was immunoreactive for VIP. Our results suggest that the degree of coexistence of VIP-IR and nNOS-IR in the nerve fibers and terminals innervating penile smooth muscle show wide species differences. They also suggest that the mechanisms by which VIP could be involved in neurogenic penile erection may vary between species.