Hypertrophy of medial globus pallidus and substantia nigra reticulata in 6‐hydroxydopamine‐lesioned rats treated with L‐DOPA: Implication for L‐DOPA‐induced dyskinesia in Parkinson's disease

The medial globus pallidus plays a crucial role in generation of L‐DOPA‐induced dyskinesia in patients with Parkinson's disease. The 6‐hydroxydopamine‐lesioned rat exhibiting behavioral sensitization to L‐DOPA is one useful animal model for examining L‐DOPA‐induced dyskinesia. To determine neuropathological abnormality responsible for behavioral sensitization, the medial globus pallidus and the substantia nigra reticulata in 6‐hydroxydopamine‐lesioned rats treated with L‐DOPA were examined. Intermittent L‐DOPA treatment induced hypertrophy of the lesioned‐side of medial globus pallidus and substantia nigra reticulata of 6‐hydroxydopamine‐lesioned rats with behavioral sensitization to L‐DOPA. Additionally, coadministration of a 5‐HT_1A receptor agonist, 8‐hydroxy‐2(di‐n‐propylamino)tetralin with L‐DOPA, alleviated the hypertrophy with improvement of the behavioral sensitization. These results suggest that hypertrophy of the medial globus pallidus and substantia nigra reticulata is associated with induction of behavioral sensitization to L‐DOPA in 6‐hydroxydopamine‐lesioned rats. Therefore, neuropathological changes corresponding to hypertrophy might underlie L‐DOPA‐induced dyskinesia in patients with Parkinson's disease.     

原位杂交法检测胃癌组织中IL-6及其受体mRNA的表达

胃癌是最常见的癌肿之一,应用原位杂交技术检测胃癌组织中IL—6及其受体mRNA的表达情况,具有灵敏度高、特异性强的特点,而且较直观地在组织原位和转录水平对标本中IL—6及其受体进行研究,这使得形态学观察与功能学检测相结合,更能反映胃粘膜不同病变细胞分泌IL—6及其受体的情况。     

E-钙黏附蛋白、CD44v6在卵巢上皮性肿瘤及卵巢癌转移灶中的表达

目的：在基因表达水平上研究黏附分子(E-cadherin，CD44v6)与卵巢癌转移的关系。方法：用免疫组化S-P法，选取1997～2002年间石蜡包埋的卵巢上皮性肿瘤组织块107块，其中良性上皮性肿瘤30例，交界瘤13例，恶性34例(Ⅰ、Ⅱ期4例，Ⅲ、Ⅳ期30例)，对30例恶性晚期(Ⅲ、Ⅳ期)病例选取对应的大网膜转移组织。结果：30例良性上皮性肿瘤组织中，E-钙黏附蛋白100％强阳性表达，CD44v6100％阴性。13例交界瘤中，E-钙黏附蛋白有11例(84．6％)强阳性，CD44v6有1例弱阳性表达。34例恶性上皮性肿瘤中，E-钙黏附素有24例(70．6％)阳性表达，CD44v6有11例(32．4％)阳性表达。二指标在良性上皮性肿瘤与卵巢癌之间的阳性表达有显著性差异(P=0．001，P=0．000)。二指标在原发灶和大网膜转移灶之间表达无显著差别(P=1．000，P=1．000)。结论：E-cadherin及CD44v6在上皮性卵巢肿瘤中的表达呈相反趋势，E-cadherin及CD44v6与卵巢癌组织学分级及预后无明显相关性。     

IMMUNOREGULATORY EFFECT OF PANAXATRIOL GINSENOSIDE ON IMMUNE FUNCTIONS IN BONE MARROW SUPPRESSED MICE

The effect of Panaxatriol Ginsenoside (PTGS) on Immune functions in bone marrow suppressed mice induced by injection of cyclophosphamide (CY) has been studied. Bone marrow suppressed mice were made by injection of CY (150 mg/kg) parenterally. Subcutaneous injection of PTGS three days earlier partially restored the number and the activity of bone marrow cells, significantly enhanced the production of IL-1, IL- 3 and IL- 6 like substances and promoted the reactivity of murlne spleen cells to Con-A In bone marrow suppressed mice.     

短暂性脑缺血发作患者血浆中TXB2和PGF1α含量检测

本文用放射免疫法测定47例短暂性脑缺血发作(TIA)患者血浆中血栓素B_2(TXB_2)和6酮-前列腺F_(1α)(PGF_(1α))的含量。结果发现TIA患者血浆中TXB_2含量增高,PGF_(1α)降低;头颅CT或MRI示有小灶性梗塞者及TIA发作持续时间长于30min者TXB_2升高和PGF_(1α)降低更显著。治疗3个月后,血浆PGF_(1α)显著增高。TXB_2和PGF_(1α)在体内的失平衡是急性脑血管疾病发病的重要机理之一。     

Association of a 70-kDa tyrosine phosphoprotein with the CD16:ζ:γ complex expressed in human natural killer cells

The CD16: ζ: γ receptor complex allows natural killer (NK) cells to recognize and eliminate antibody-coated target cells. Whereas the ectodomain of CD16 is the receptor for Fcγ domains of immunoglobulins, disulfide-linked homo- and heterodimers composed of ζ and γ are required for the cell surface expression, and signal transduction properties of the complex. Engagement of CD16 activates the tyrosine kinase pathway, which induces the tyrosine phosphorylation of several substrates, including the ζ subunit and the phospholipase C γ-1 and γ-2 isoforms. Here we show that CD 16 stimulation of either peripheral blood NK cells, leukemic NK cells, or Jurkat transformants expressing a CD16:ζ:γ receptor complex, results in the tyrosine phosphorylation of a 70 kDa ζ-associated protein (pp70). Similarly, a 70-kDa ζ-associated phosphoprotein in T cells has been shown to be a tyrosine kinase (ZAP-70). Peptide mapping analysis indicates that the 70-kDa ζ-associated phosphoproteins from T cells and NK cells are structurally indistinguishable. We conclude that the CD16:ζ:γ complex may use a ZAP-70-related non-receptor tyrosine kinase, in the CD16 signaling cascade leading to NK cell activation.     

谷氨酸脱氢酶,胆碱氧化酶和葡萄糖-6-磷酸酶对溶酶体中~(67)Ga积累的影响(英文)

目的:比较正常肝组织与肝癌AH 109A,吉田肉瘤中谷氨酸脱氢酶,胆碱氧化酶和葡萄糖-6-磷酸酶的活力对~(67)Ga摄取与积累的影响;方法:制备~(67)Ga枸橼酸溶液给大鼠静注后处死大鼠,制备亚细胞悬液,液闪计数器测定放射活度.结果:~(67)Ga的放射活性在正常肝组织溶酶体中(55％积聚)显著高于肝癌AH109A(32％积聚)和吉田肉瘤(18％)积聚.谷氨酸脱氢酶的活力在正常肝组织,肝癌和吉田肉瘤分别是1830±s 320 U·L~(-1),23±s 6 U·L~(-1)和7±s 2 U·L~(-1);胆碱氧化酶的活力分别是46±s 10 U·L~(-1),25.0±s 0.4 U·L~(-1),2.0±0.4 U·L~(-1);葡萄糖-6-磷酸酶活力分别是2550±s 180 U·L~(-1),84±s 14 U·L~(-1),78±s13 U·L~(-1).结论:正常肝组织中溶酶体酶活力很强,对~(67)Ga的积累起较大作用.癌变组织酶活力降低而作用减弱.吉田肉瘤细胞无肝细胞特点,其溶酶体对~(67)Ga积累作用不大.     

姜黄素对TK6细胞的增殖抑制和凋亡诱导作用研究

目的 :　观察姜黄素 (curcumin)对人的类淋巴母细胞 TK6细胞的增殖抑制和凋亡诱导作用 ,为进一步探讨其抗诱变、抗肿瘤的机制和开发利用提供理论依据。方法 :　姜黄素处理TK6细胞 ,采用 MTT比色分析法、3 H- Td R掺入法和细胞周期测定以及细胞超微结构观察和流式细胞分析。结果 :　 2 0 μmol/L的姜黄素处理细胞 2 4 h,即可产生显著的细胞增殖抑制作用和凋亡诱导作用 ,且有剂量和时间依赖性。姜黄素引起细胞的凋亡主要在细胞周期的 DNA合成期 (S期 ) ,将细胞周期阻滞在静止期和 DNA合成前期 (G0 /G1期 )。结论 :　姜黄素对 TK6细胞具有显著的增殖抑制作用和凋亡诱导作用。