Acta biologica Academiae Scientiarum Hungaricae最新文献_第2页

Central nervous regulation of pituitary TSH response induced by thiouracil treatment or by thyroidectomy. 中枢神经调节硫脲嘧啶治疗或甲状腺切除术诱导的垂体TSH反应。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

B Mess, C Rúzsás, I Rozsos

{"title":"Central nervous regulation of pituitary TSH response induced by thiouracil treatment or by thyroidectomy.","authors":"B Mess, C Rúzsás, I Rozsos","doi":"","DOIUrl":"","url":null,"abstract":"The serotoninergic neuron system of the midbrain and hypothalamus was previously shown to inhibit the basal secretion of the TRH-TSH-thyroid axis. The aim of the present study was to investigate the influence of the serotoninergic system on the TSH response of the adenohypophysis to specific loads. Serum TSH levels were determined 7 days after thyroidectomy or the beginning of thiouracil administration. Animals were simultaneously treated either by intrahypothalamic implantation of serotonin-containing needles or by intraventricular or daily subcutaneous injections of the same drug. The thiouracil-induced goitre formation and increase in serum TSH concentration were significantly diminished by serotonin treatment. Similarly, the thyroidectomy-induced rapid rise in TSH blood level was also remarkably inhibited in the serotonin-treated animals. Serotonin was proved to influence rather TRH-output than pituitary TSH secretion, since exogenous TRH, injected to serotonin-pretreated animals had the same TSH-mobilizing potency as found in the not premedicated group. It is concluded that besides the inhibition of the basal secretion of the TRH-TSH-thyroid axis by serotonin, there is an integrative role of the serotoninergic system in the mediation of the reactivity of this circuit in reply to specific influences loading pituitary-thyroid function.","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"33 2-3","pages":"247-54"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18195388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical stimulation of chemical blockade of vestibular nuclei can serve as the unconditioned stimulus in the conditioned taste aversion paradigm. 前庭核化学阻断的电刺激可作为条件性味觉厌恶范式的非条件刺激。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

O Buresová, L V Semenov, J Bures

{"title":"Electrical stimulation of chemical blockade of vestibular nuclei can serve as the unconditioned stimulus in the conditioned taste aversion paradigm.","authors":"O Buresová, L V Semenov, J Bures","doi":"","DOIUrl":"","url":null,"abstract":"Nausea of vestibular origin can be used instead of poisoning in the conditioned taste aversion (CTA) paradigm. In an attempt to establish the forms of vestibular stimulation best suited for inducing CTA in rats, effectiveness of 2 h rotation (Exp. 1) was compared with tonal asymmetry elicited by unilateral microinjection of 5.0 microliters of 25% KCl into the vestibular complex (Exp. 2), by unilateral electrical stimulation of vestibular nuclei (100 Hz, 1 ms, 100-200 microA, 15 min--Exp. 3) or by 10 min polarization of labyrinth through electrodes inserted in the external auditory meati (Exp. 4). Nystagmus, deviation of the head and leaning towards the blocked and away from the stimulated side were typical symptoms. When the above stimuli were applied within 10 min after saccharin drinking, galvanic stimulation was ineffective, but electrical stimulation or chemical blockade of vestibular nuclei elicited marked CTA to saccharin, considerably stronger than CTA induced by rotation. It is concluded that direct interference with the activity of vestibular nuclei elicits CTA more effectively than the stimulation of the labyrinth and is, therefore, well suited for the analytical research into the mechanisms of CTA.","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"33 2-3","pages":"139-48"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18194446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Is alpha-amylase activity present in the human granulocytes? -淀粉酶活性存在于人粒细胞中吗?

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

I Zakrzewska, J Prokopowicz

引用次数: 0

Tissue culture of gonadal cells. 性腺细胞的组织培养。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

S Stoklosowa

引用次数: 0

Effect of abscisic acid (ABA) on endogenous gibberellin levels in Phaseolus vulgaris L. seeds during their swelling. 脱落酸(ABA)对菜豆种子溶胀过程中内源赤霉素水平的影响

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

M Nagy, C Hodur

引用次数: 0

Non-synaptic intercellular communication: presynaptic inhibition. 非突触细胞间通讯:突触前抑制。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

E S Vizi

引用次数: 0

Fine structure of dorsal root terminals in the dorsal horn of the frog spinal cord. 蛙脊髓背角背根末端的精细结构。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

G Lévai, C Matesz, G Székely

{"title":"Fine structure of dorsal root terminals in the dorsal horn of the frog spinal cord.","authors":"G Lévai, C Matesz, G Székely","doi":"","DOIUrl":"","url":null,"abstract":"Dorsal root fibers were labelled with cobalt and their terminals were identified in an oval-shaped area and in its lateral extension of the dorsal horn. These areas receive mainly cutaneous afferents. A number of labelled terminals exhibited either an electron lucent and swollen, or an electron dense and shrunken form of degeneration. The majority of the labelled terminals could be classified into three groups. Type A terminals were small, less than 2 microns in diameter, and lightly stained. Type B terminals were larger and neurofilaments and an electron dense material resulted in a dark staining of the bouton. Type C terminals contained medium size granulated vesicles. The type A and type B terminals were frequently found in postsynaptic positions. The presynaptic profiles contained spheric or elliptic vesicles, or they exhibited the structural characters of presynaptic dendrites. Preterminal dorsal root fibers, identified on account of their cobalt label, were also found in postsynaptic positions to the same kinds of presynaptic profiles. It is concluded that cobalt labelling is sufficiently selective for a reliable identification of dorsal root terminals. No correlation was found between the different forms of degeneration and the different types of terminal boutons. The possible functional significance of the postsynaptic relation of dorsal root fibers and terminals to a variety of presynaptic profiles is discussed.","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"33 2-3","pages":"231-46"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18032772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Too "much" and too "soon". A lifetime of inquiry into the functional organization of the nervous system. “太多”和“太快”。毕生探索神经系统的功能组织。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

J Szentágothai

引用次数: 0

Blockade of retrograde axoplasmic transport induces transganglionic degenerative atrophy of central terminals of primary nociceptive neurons. 阻断逆行轴浆运输诱导初级伤害神经元中央末梢的跨神经节退行性萎缩。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

B Csillik, E Knyihár-Csillik, J Tajti

引用次数: 0

Effect of polypeptide hormones (insulin, thyrotropin, gonadotropin, adrenocorticotropin) on RNA synthesis in Tetrahymena, as assessed from incorporation of 3H-uridine. 多肽激素(胰岛素、促甲状腺激素、促性腺激素、促肾上腺皮质激素)对四膜虫RNA合成的影响，通过3h -尿苷的掺入进行评估。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

G Csaba, L Ubornyák

引用次数: 0