3751
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Wang Q, Li P. Inhibition of baroreflex following microinjection of GABA or morphine into the nucleus tractus solitarii in rabbits. JOURNAL OF THE AUTONOMIC NERVOUS SYSTEM 1988; 25:165-72. [PMID: 3069890 DOI: 10.1016/0165-1838(88)90021-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The possibility that putative transmitters may influence the aortic nerve stimulation-produced bradycardia and depressor responses was examined in urethane- and chloralose-anesthetized, paralyzed and artificially ventilated rabbits. The ipsilateral microinjection of gamma-aminobutyric acid (GABA, 2-4 micrograms) or morphine hydrochloride (2-4 micrograms) into the nucleus tractus solitarii (NTS) area could partially block the evoked bradycardia and depressor responses produced by stimulation of the aortic nerve without influencing the basal blood pressure and heart rate. This blocking effect of either GABA or morphine was dose-related. Pretreatment with GABA receptor antagonist bicuculline methiodide (0.15-0.20 micrograms) and opiate receptor antagonist naloxone hydrochloride (1-2 micrograms) into the same medullary area completely abolished the effect of GABA and morphine, respectively. Application of bicuculline also greatly antagonized the effect of morphine, but the blocking effect of GABA on the evoked bradycardia and depressor responses still existed following the pretreatment of naloxone. These results indicate that GABAergic and opiate systems present at the NTS exert an inhibitory influence on the evoked baroreflexes and inhibitory effect of the latter may be related to the activation of GABAergic receptor in this nucleus.
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3752
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Clarke RH, Wang Q, Isner JM. Laser Raman spectroscopy of atherosclerotic lesions in human coronary artery segments. APPLIED OPTICS 1988; 27:4799-800. [PMID: 20539655 DOI: 10.1364/ao.27.004799] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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3753
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Wang Q, Li P. Stimulation of the ventrolateral medulla inhibits the baroreceptor input to the nucleus tractus solitarius. Brain Res 1988; 473:227-35. [PMID: 3069182 DOI: 10.1016/0006-8993(88)90851-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Extracellular recording experiments were done in urethane- and chloralose-anaesthetized, paralyzed and artificially ventilated rabbits. Thirty-one baroreceptor-sensitive neurones were identified in the region of the nucleus tractus solitarius (NTS) by their excitatory responses to stimulation of the ipsilateral aortic nerve. A conditioning stimulus delivered to the ipsilateral or contralateral rostral ventrolateral medulla (rVLM) inhibited the excitatory responses of 80.0% (19 out of 24) neurones to an aortic test stimulus as early as 3 ms and extending as long as 400 ms after conditioning. The same inhibitory effect was also observed by application of excitant amino acid DL-homocysteic acid (0.2 M, 100 nl) into the ipsi- or contralateral rVLM area in 6 units. In 5 units inhibited by rVLM stimulation, evoked discharges were inhibited by prolonged electrical stimulation of the superficial peroneal nerve (SP) with low intensity and low frequency (0.1-0.3 mA and 5-10 Hz). These results provide the electrophysiological evidence for the suppressing effect of the rVLM on the excitatory responses of NTS neurones to baroreceptor afferent stimulation.
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3754
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Lin SX, Wang Q, Wang YL. Interactions between Escherichia coli arginyl-tRNA synthetase and its substrates. Biochemistry 1988; 27:6348-53. [PMID: 3064808 DOI: 10.1021/bi00417a023] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Interactions between Escherichia coli arginyl-tRNA synthetase and its substrates were extensively studied and distinctly demonstrated. Various approaches such as equilibrium dialysis, fluorescence titration, and substrate protection against heat inactivation of the enzyme were used for these studies. In the absence of other substrates, the equilibrium dissociation constants for arginine, ATP, and the cognate tRNA were about 70 microM, 0.85 mM, and 0.45 microM, respectively, at pH 7.5, in Tris buffer. The binding of arginine to the enzyme was affected neither by the presence of tRNA nor by the presence of ATP but was considerably enhanced when ATP and tRNA were both present at saturating concentrations. The dissociation constant in this case (about 16 microM) was very close to the Km (12 microM) for arginine during aminoacylation. The binding of ATP (the equilibrium dissociation constant KD approximately 0.85 mM) was not affected by the presence of arginine but was depressed in the presence of tRNA (KD became 3 mM). Arginyl-tRNA showed a dissociation constant of (4-5) X 10(-7) M which was not affected by the presence of a single other substrate. Possible explanations for the high Km for tRNA in the aminoacylation are discussed. Our results indicated pronounced interactions between substrates mediated by the enzyme under catalytic conditions. Periodate oxidation did not alter the tRNA binding to the enzyme. The oxidized tRNA still afforded protection against heat inactivation of the enzyme.
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3755
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Holzwarth NA, Wang Q, Had SD. Electronic structure of KHgC4 and related materials. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:3722-3732. [PMID: 9946741 DOI: 10.1103/physrevb.38.3722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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3756
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Wang Q. [Pattern visual evoked potentials in patients with occipital infarction]. ZHONGHUA SHEN JING JING SHEN KE ZA ZHI = CHINESE JOURNAL OF NEUROLOGY AND PSYCHIATRY 1988; 21:23-5, 62. [PMID: 3402270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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3757
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Li HL, Wang Q, Wang Q, Gu YH. [Functional relationship between the pressor effect of the substantia nigra and depressor effect of the nucleus arcuatus hypothalami]. SHENG LI XUE BAO : [ACTA PHYSIOLOGICA SINICA] 1988; 40:28-35. [PMID: 3388061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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3758
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Wang Q. [Current clinical problems in traditional Chinese medicine and their countermeasures]. ZHONG XI YI JIE HE ZA ZHI = CHINESE JOURNAL OF MODERN DEVELOPMENTS IN TRADITIONAL MEDICINE 1987; 7:494-6. [PMID: 3436017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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3759
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Wang Q, Chen XQ, Zhao HY. [Practical value of indexes of pulmonary gas-exchange function in obliterative pulmonary vascular diseases]. ZHONGHUA NEI KE ZA ZHI 1987; 26:409-12, 445-6. [PMID: 3428029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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3760
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Shou MG, Wang MY, Wang Q, Zhang TM. [Effect of oridonin and bleomycin A5 combination on DNA syntheses in tumor and bone marrow cells]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1987; 8:83-6. [PMID: 2440237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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3761
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Wang Q, Li SR. [Relationship between heart rate and the effective refractory period of ventricular cells of the rabbit in sinus rhythm in situ]. SHENG LI XUE BAO : [ACTA PHYSIOLOGICA SINICA] 1986; 38:610-8. [PMID: 3576242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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3762
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Du FH, Wang Q. [Antihypertensive effect of indapamide and its effect on extracellular and intracellular Na and K concentrations in red blood cells]. ZHONGHUA NEI KE ZA ZHI 1985; 24:705-8, 767. [PMID: 3830615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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3763
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Li SR, Huang M, Zhang Y, Lu G, Wang Q, Chen LX, Zhou GC. Effect of vagus nerve on the action potential duration of ventricular cell of dog. I. Effect of stimulation of vagus nerve and atropine. ACTA ACADEMIAE MEDICINAE WUHAN = WU-HAN I HSUEH YUAN HSUEH PAO 1985; 5:139-46. [PMID: 2999666 DOI: 10.1007/bf02911170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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3764
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Abstract
A quantitative study of semi-thin sections through Schlemm's canal from 44 human eyes was undertaken. It was shown from counts of endothelial nuclei that the cell population decreased with age. The decrease in cell population was estimated from linear regression equations to be in the order of 430 cells per year for the whole canal and 320 cells per year for the canal's inner wall. Evidence was provided which indicated that counts of the giant vacuoles also decreased with age.
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3765
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Wang Q. [Hemodynamics and radial sphygmogram in hypertensive patients with different pathological conditions based on the differentiation of symptoms according to traditional Chinese medicine]. ZHONG XI YI JIE HE ZA ZHI = CHINESE JOURNAL OF MODERN DEVELOPMENTS IN TRADITIONAL MEDICINE 1984; 4:610-4, 580. [PMID: 6240330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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3766
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Zhang SZ, Wang Q. Partial serial duplication of the short arm of chromosome 3. Chin Med J (Engl) 1984; 97:425-8. [PMID: 6437761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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3767
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Zhang SZ, Wang Q. [Partial serial duplication of the short arm of human chromosome 3]. ZHONGHUA YI XUE ZA ZHI 1984; 64:18-20. [PMID: 6430487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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3768
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Li ZX, Zhang JA, Zuo ZM, Wang Q, Lin JX. Normal values of 10 dermatoglyphic parameters in the Yi nationality. Chin Med J (Engl) 1983; 96:847-9. [PMID: 6428818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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3769
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Bei SZ, Li YA, Li L, Pan ZY, Wang Q, Yan QY. Electron microscopy of DNA molecules from blastoderm nuclei and yolk granules beneath blastoderm of fertilized and unincubated chicken eggs. SCIENTIA SINICA. SERIES B, CHEMICAL, BIOLOGICAL, AGRICULTURAL, MEDICAL & EARTH SCIENCES 1983; 26:818-22. [PMID: 6684789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The DNA molecules isolated from the blastoderm nuclei and yolk granules beneath the blastoderm of fertilized and unincubated chicken eggs were observed under electron microscope, using the DNA sample of calf thymus as control. The results showed that both nuclear and yolk DNAs are linear, and their molecules are very similar to those of thymus DNA in shape. Since chromatin was first prepared from blastoderm nuclei and yolk granules respectively and then DNA was isolated from both of chromatin samples, it could be concluded that yolk granules possess both DNA chromatin as nuclei do.
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3770
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Bei SZ, Li YA, Li L, Pan ZY, Yan QY, Wang Q. Chromatin and DNA of yolk granules beneath "blastoderm region" of unfertilized chicken egg. SCIENTIA SINICA. SERIES B, CHEMICAL, BIOLOGICAL, AGRICULTURAL, MEDICAL & EARTH SCIENCES 1983; 26:823-7. [PMID: 6684790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Electron microscopic study shows that the chromatin structure of yolk granules beneath the "blastoderm region" of the unfertilized chicken egg is identical to that of yolk granules beneath the blastoderm of the fertilized and unincubated chicken egg, and both chromatin structures are very similar to those of blastoderm nuclei. Furthermore the molecular shapes of DNA of both yolk granules are also very similar to those of the blastoderm nuclei, being all linear. Based on these observations, we have come to the conclusion that chromatin and DNA widely exist in the yolk when yolk granules have reached their development-specified competence. The results indicate further that the yolk granules are capable of synthesizing DNA, and provide the condition for the interaction of DNA with histones to form chromatin through self-organization.
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3771
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Bei SZ, Li YA, Li L, Pan ZY, Li GX, Lan BX, Bao YH, Yan QY, Wang Q. Electron microscopic studies on the chromatin of blastoderm nuclei and yolk granules beneath blastoderm of fertilized and unincubated chicken eggs. SCIENTIA SINICA. SERIES B, CHEMICAL, BIOLOGICAL, AGRICULTURAL, MEDICAL & EARTH SCIENCES 1983; 26:708-15. [PMID: 6685342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Chromatin prepared both from the yolk granules beneath the blastoderm and from the nuclei of the blastoderm cells of fertilized and unincubated chicken eggs was examined under electron microscope and its structure was compared. The results indicate that the above two kinds of chromatin fibers seem to have no apparent difference in structural relation and diameter. The electron microscopic appearances of the basic structures of both kinds of chromatin are all "beads-on-a-string"-shaped filaments. After the digestion of chromatin from both raw materials with DNase I, the connecting strings of chromatin fibers were cut off, only the scattered beads could be observed under electron microscope. The diameter of the scattered beads is equal to that of the beads on the chromatin fibers, and most of them are 150 A in diameter.
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3772
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Wang Q. [Clinical investigation of 143 cases of pulmonary vascular diseases]. ZHONGHUA JIE HE HE HU XI XI JI BING ZA ZHI = CHINESE JOURNAL OF TUBERCULOSIS AND RESPIRATORY DISEASES 1983; 6:39-41. [PMID: 6872772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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3773
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Wang Q. [Electron probe analysis of calcium and phosphorus distributions in the enamel of artificial caries]. ZHONGHUA KOU QIANG KE ZA ZHI [CHINESE JOURNAL OF STOMATOLOGY] 1982; 17:164-6. [PMID: 6961002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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3774
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Ma T, Yu ZH, Lu TZ, Wang SY, Dong CF, Hu XY, Zhu HC, Liu RN, Yuan CY, Wang GQ, Cai HZ, Wang Q. High-iodide endemic goiter. Chin Med J (Engl) 1982; 95:692-6. [PMID: 6817996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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3775
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Wang Q. [Clinico-pathological analysis of inverted follicular keratosis of the eyelid and eyebrows]. [ZHONGHUA YAN KE ZA ZHI] CHINESE JOURNAL OF OPHTHALMOLOGY 1982; 18:206-7. [PMID: 6816542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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