芹菜甲素保护脑细胞的作用

以每周定时im马桑内酯0.9～1.5mg/kg三个月为实验性癫痫慢性发作模型。ig芹菜甲素700mg/kg能明显降低大鼠癲痫发作的程度和次数,延长潜伏期。脑形态学结果表明,芹菜甲素对大脑顶叶皮层细胞、胶质细胞和小脑蚓部蒲肯野细胞有一定的保护作用。同时观察的安定1.5～5mg/kg则无此作用。     

Surgical transposition of the ovary: radiologic appearance

Therapeutic irradiation of the pelvis of a young female patient will result in loss of ovarian function. In a surgical technique termed ovarian transposition, the ovary is repositioned to the iliac fossa or paracolic gutter outside the radiation field. The computed tomographic (CT) scans and sonograms of five patients with cervical carcinoma who underwent this procedure were reviewed. The normal transposed ovary was of soft-tissue attenuation, often with one or more small cysts. Large cysts developed in the ovaries of three patients. One cyst was functional, another was due to a mesothelial inclusion cyst, and the third was most probably related to the transposition itself. Since the transposed ovary is difficult to palpate, CT or sonography can be used to demonstrate and follow up a cystic mass. Recognition of the appearance and location of the transposed ovary is important to avoid misinterpretation of a solid or cystic mass in patients who are at risk for tumor recurrence.     

Asymptomatic degenerative disk disease and spondylosis of the cervical spine: MR imaging

Evidence on magnetic resonance (MR) images of disk degeneration and herniation, as well as of cord and root impingement, may be regarded either as normal, age-related changes or as causative of symptoms. Individuals referred for MR examinations of the larynx without symptoms referable to the cervical spine were studied retrospectively (35 patients) or prospectively (65 patients) over a 2-year period. With a solenoid surface coil, 5-mm-thick sections were acquired in sagittal, axial, and coronal planes with T1-weighted spin-echo pulsing sequences. Disk protrusion (herniation/bulge) was seen in five of 25 (20%) patients aged 45-54 and 24 of 42 (57%) patients older than 64 years of age. Posterolateral protrusions were seen in only nine of 100 patients and occurred with greatest frequency in patients over 64 years of age. In no patient was obliteration of the intraforaminal fat seen. Spinal cord impingement was observed in nine of 58 (16%) patients under 64 years of age, and in 11 of 42 (26%) patients over 64 years of age. Cord compression was observed in seven of 100 patients and occurred solely secondary to disk protrusion in all cases. The percentage of cord area reduction never exceeded 16% and averaged approximately 7%.     

Detection of leukemic clone maturation in vivo by premature chromosome condensation

The purpose of this study was to determine the feasibility of using the technique of premature chromosome condensation to detect the in vivo maturation of abnormal elements in patients with chronic myelogenous leukemia (CML), myelodysplastic syndrome, and acute leukemia. Patients were chosen for study if there were a clinical suggestion of in vivo maturation and a leukemic clone exhibiting a distinguishable karyotypic abnormality. Mature peripheral blood granulocytes were enriched by two- step Ficoll-Hypaque gradient sedimentation and fused with mitotic Chinese hamster ovary cells to induce the formation of prematurely condensed chromosomes (PCC). These PCC were then analyzed for chromosome number per cell (in the case of patients with a numerical abnormality) or by G-banding (in the case of specific translocations). Of 13 patients chosen for study, 12 showed karyotypic evidence for maturation of the abnormal elements in vivo. Maturation was observed in a number of clinical situations including before treatment in benign CML and myelodysplasia, after low-dose and high-dose chemotherapy in myelodysplasia and acute myelogenous leukemia (AML), and in remission. These results suggest that the technique of premature chromosome condensation can be a powerful tool in better understanding the biology of disease and mode of response to therapy in vivo in patients with leukemia and preleukemic syndromes, especially during treatment with agents thought to induce maturation of the leukemic elements.     

颈动脉海绵窦瘘12例的眼部表现

0　引言　颈动脉海绵窦瘘 (CCF)是眼科和神经外科较为常见的一种颅内动、静脉直接交通 ,眼部症状和体征在本症中尤其突出 .临床上只要及时发现 ,正确诊断 ,治疗恰当 ,均能获得理想效果 .我院自 1998- 0 1/ 1999- 0 2共收治 CCF患者 12例 ,经介入治疗后效果十分满意 .1　对象和方法　 CCF患者 12 (男 8,女 4)例 ;年龄 9～ 6 8岁 ,单侧 11例 ,双侧 1例 ;有外伤史者 11例 ,伤后有昏迷史者 10例 ,伴有骨盆骨折 3例 ,腰椎骨折等 8例 ,病史 1～ 5 2 d.全部患者均主诉颅内“飕飕样”杂音 ,夜间尤甚 . 8例伤后头痛 ,严重鼻衄 1例 ,视物模糊 11例…     

异基因外周血干细胞移植患者人类白细胞抗原B27的表达

目的:分析白血病患者行异基因外周血干细胞移植后人类白细胞抗原B27的表达特点,及其与慢性移植物抗宿主病的关系。方法:选择2003-09/2006-06在广西医科大学第一附属医院行异基因外周血干细胞移植术的45例白血病患者,按《血液病诊断和疗效标准》进行疾病的诊断和分型。全部患者均知情同意并签署知情同意书。男27例,女18例,22～51岁。其中急性髓细胞白血病13例、急性淋巴细胞白血病17例、慢性粒细胞白血病15例。供者均为白细胞抗原配型6个位点全相合的同胞兄妹。急性髓细胞白血病和慢性粒细胞白血病患者采用BU/CY方案:马利兰4mg/(kg·d)×4d,环磷酰胺60mg/(kg·d)×2d;急性淋巴细胞白血病患者预处理采用TBI/CY方案:全身照射5.0Gy/d×2d,环磷酰胺60mg/(kg·d)×2d。供者采用粒细胞集落刺激因子皮下注射动员干细胞。采用美国Baxter CS-3000plus血细胞分离机采集外周血干细胞,每位供者采集0, 1, 2d3次。回输单个核细胞、粒-单核系集落形成单位、CD34 细胞。采用流式细胞术动态检测45例白血病患者异基因外周血干细胞移植前后人类白细胞抗原B27表达的变化。结果:45例患者全部进入结果分析。①45例患者均获得造血重建,经荧光标记PCR短串联重复序列DNA位点分析,全部患者移植后血细胞的DNA与供者血细胞DNA完全一致。发生急性移植物抗宿主病4例,慢性移植物抗宿主病14例,出血性膀胱炎3例,肝静脉闭塞病4例。②移植后发生慢性移植物抗宿主病患者人类白细胞抗原B27表达水平明显低于无移植物抗宿主病患者[移植后180d:(30.13±10.24)%,(39.61±10.89)%;移植后峰值:(33.53±10.36)%,(45.76±12.09)%,P<0.05]。③移植前未缓解白血病患者人类白细胞抗原B27表达水平则明显高于移植前达到完全缓解患者[(27.39±10.31)%,(16.62±8.58)%,P=0.005],移植后疾病复发患者复发时人类白细胞抗原B27表达水平明显高于其移植后完全缓解时[(27.76±10.09)%,(15.69±6.98)%,P=0.015]。移植前未缓解和移植后复发患者人类白细胞抗原B27表达水平与肿瘤细胞占骨髓非红系细胞的百分比呈正相关关系(r=0.756,P=0.000)。结论:移植前未缓解和移植后复发白血病患者人类白细胞抗原B27表达与肿瘤细胞占骨髓非红系细胞的百分比呈正相关,人类白细胞抗原B27表达水平随着肿瘤细胞百分比的增高而升高。     

神经生长因子对小鼠突触体内Ca2+水平的调节作用

观察了多次海马内微注射NGF对小鼠突触体内游离钙水平的影响,并在离体情况下观察NGF对EGTA和CaCl₂分别造成突触体内低钙和高钙状态的调节作用。结果如下:(1)在体实验表明,一定剂量的NGF可显著降低老年小鼠海马突触体内游离钙水平(P<0.05);(2)离体实验表明,当突触体游离钙水平降低时,适当剂量的NGF具有升高游离钙水平的作用;而突触体内游离钙水平升高时,则NGF有降低游离钙水平的作用。提示NGF对游离钙水平的双向调节作用可能是NGF改善老年性记忆衰退的作用机制。