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1.
Neurotensin immunoreactivity in the central nucleus of the rat amygdala: an ultrastructural approach
Neurotensin (NT) was demonstrated in the central nucleus of the rat amygdala (CNA) using a modification of the avidin-biotin complex immunohistochemical technique. Electron-dense reaction product (particles were 15-25 nm in diameter) was localized in perikarya, dendrites, axons, and axon terminals. It was found also associated with profiles of rough endoplasmic reticulum, mitochondria, microtubules, and small agranular as well as large granular vesicles. In distal dendrites, the reaction product was associated with microtubules, vesicles, and postsynaptic densities. Axon terminals of three types formed synaptic contracts with NT-immunoreactive neurons in the CNA: one was characterized by numerous round or oval agranular vesicles, the second by numerous pleomorphic vesicles, and the third by agranular vesicles that were loosely distributed and pleomorphic. All three types formed symmetric axosomatic and asymmetric axodendritic contacts. NT-immunoreactive axon terminals containing small round agranular vesicles stood out clearly from the intermingling profiles of immunonegative structures. We found numerous glomeruli, each consisting of a central NT-immunoreactive dendrite surrounded by all three types of axon terminals. We observed that some NT-immunoreactive terminals formed symmetric axoaxonal contacts with each other, providing evidence for the presence of local NT-to-NT circuits, whereas many others synapsed with axon terminals devoid of NT immunoreactivity. 相似文献
2.
Cs. Léránth T. H. Williams M.D. Ph.D. D.Sc. J. Y. Jew A. Arimura 《Cell and tissue research》1980,212(1):83-89
Summary The superior cervical ganglia (SCG), celiac superior mesenteric ganglia (CMG), and splanchnic nerve of unoperated guinea pigs, as well as both proximal and distal stumps of a previously transected branch of the postganglionic plexus of the CMG, were immunostained for somatostatin (SS). In addition, the PAP technique was adapted for fine-structural visualization of SS. A greater proportion of cells were labeled for SS in the CMG than in the SCG. PAP molecules were present in one type of intraganglionic axons. Only two labeled axons were found in the splanchnic nerve. Neither proximal nor the distal stump of the transected CMG postganglionic nerve contained labeled axons. The present results support the hypothesis that the intraganglionic axons labeled for SS arise from SS-containing intraganglionic neurons. 相似文献
3.
Jean Jew M.D. Bang-H. Hwang Dean Sandquist Terence H. Williams 《Cell and tissue research》1979,202(2):241-249
Summary The question of age as a possible factor influencing the regenerative response of catecholaminergic varicosities in the hypothalamus was investigated in the supraoptic commissure and the paraventricular, periventricular, and dorsomedial hypothalamic nuclei of rats that had received intraventricular injections of the neurotoxin 6-hydroxydopamine when they were (1) neonates, (2) young adults, or (3) senescent adults. After postneurotoxin survival for 4, 21, 56, or 180 days, the animals were perfused, and the hypothalamic tissue sections were cut and processed using a glyoxylic acid method for localizing catecholamines. Four days following neurotoxin administration, counts of fluorescent varicosities showed a significant loss of catecholamine varicosities in each of the four areas. Subsequently, at least partial restoration of numbers of catecholamine varicosities occurred in all hypothalamic areas in all three age groups. It is concluded that, following selective lesions induced by the neurotoxin 6-OH-DA, catecholamine varicosities were restored both in immature and mature groups. According to the evidence obtained experimentally, the rate of restoration was greater in the neonate group, whereas the percentage restoration attained varies according to the hypothalamic area studied and the age of the animal. 相似文献
4.
Park HG Choi JY Choi SH Park MK Lee J Suh YG Cho H Oh U Kim HD Joo YH Kim SY Park YH Jeong YS Choi JK Kim JK Jew SS 《Bioorganic & medicinal chemistry letters》2004,14(7):1693-1696
A series of N-4-methansulfonamidobenzyl-N'-2-substituted-4-tert-butylbenzyl thioureas were prepared for the study of their agonistic/antagonistic activities to the vanilloid receptor in rat DRG neurons. Their structure-activity relationship reveals that there is a space for another hydrophobic binding interaction around 2-position in 4-tert-butylbenzyl region. Among the prepared derivatives, 6n show the highest antagonistic activity against the vanilloid receptor (IC(50)=15 nM). 相似文献
5.
Park HG Choi JY Choi SH Park MK Lee J Suh YG Cho H Oh U Lee J Kang SU Lee J Kim HD Park YH Su Jeong Y Kyu Choi J Jew SS 《Bioorganic & medicinal chemistry letters》2004,14(3):787-791
A series of N-4-substituted-benzyl-N'-tert-butylbenzyl thioureas were prepared for the study of their agonistic/antagonistic activities to the vanilloid receptor in rat DRG neurons. Their structure-activity relationship reveals that not only the two oxygens and amide hydrogen of sulfonamido group, but also the optimal size of methyl in methanesulfonamido group play an integral role for the antagonistic activity on vanilloid receptor. 相似文献
6.
Jew SS Park BS Lim DY Kim MG Chung IK Kim JH Hong CI Kim JK Park HJ Lee JH Park HG 《Bioorganic & medicinal chemistry letters》2003,13(4):609-612
Twenty-one pyridine-2-carboxylate derivatives were prepared by the coupling of 6-formyl-2-carboxylic acid with the corresponding phenol, thiophenol, and aniline, substituted with various functional groups. Among them, the 3,4-dichlorothiophenol ester (9p) showed the highest in vitro telomerase inhibitory activity and quite significant in vivo tumor suppression activity. 相似文献
7.
8.
Jew SS Yoo CH Lim DY Kim H Mook-Jung I Jung MW Choi H Jung YH Kim H Park HG 《Bioorganic & medicinal chemistry letters》2000,10(2):119-121
8 Semi-synthetic derivatives of asiatic acid were prepared and their protective effect against A beta-induced neurotoxicity was evaluated. Among them, asiatic acid (2), and 4, 16 showed 97, 92 and 87% of protective effect, respectively. 相似文献
9.
10.
Exercise training and calorie restriction increase SREBP-1 expression and intramuscular triglyceride in skeletal muscle 总被引:1,自引:0,他引:1