1776
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Skulski W, Jastrzebski J, Singh PP, Chen Q, Fatyga M. Limitation of the linear momentum transfer in 4He+59Co collisions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 41:2605-2614. [PMID: 9966640 DOI: 10.1103/physrevc.41.2605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1777
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Kelly JJ, Chen Q, Singh PP, Radhakrishna MC, Jones WP, Nann H. Effective interactions and nuclear structure using 180 MeV protons. III. 30Si(p,p'). PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 41:2525-2537. [PMID: 9966632 DOI: 10.1103/physrevc.41.2525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1778
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Chen Q, Sternby B, Akesson B, Nilsson A. Effects of human pancreatic lipase-colipase and carboxyl ester lipase on eicosapentaenoic and arachidonic acid ester bonds of triacylglycerols rich in fish oil fatty acids. BIOCHIMICA ET BIOPHYSICA ACTA 1990; 1044:111-7. [PMID: 2340300 DOI: 10.1016/0005-2760(90)90225-m] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Fish oil chylomicrons, obtained from mesenteric duct chyle of rats fed [3H]20:5 and [14C]20:4 or [3H]20:5 and [14C]18:2 in a fish oil emulsion, were incubated with human pancreatic lipase-colipase, human carboxyl ester lipase (CEL) and human duodenal contents. With duodenal contents, the triacylglycerols labelled with [3H]20:5 and [14C]20:4 were rapidly converted to free fatty acids (FFA) and monoacylglycerols. Also during incubation with lipase-colipase the [3H]- and [14C]triacylglycerols disappeared completely and at equal rates, but in this case much [3H]20:5 and [14C]20:4 accumulated in diacylglycerols. When CEL was also added, the rate of disappearance of [3H]- and [14C]triacylglycerols increased and the radioactivity of diacylglycerols decreased markedly. During incubation of chylomicrons labelled with [3H]20:5 and [14C]18:2 with lipase-colipase, the rates of hydrolysis of [3H]- and [14C]triacylglycerols were similar, but more [3H]20:5 than [14C]18:2 accumulated in diacylglycerols. The accumulation of [3H]diacylglycerol was reduced by adding CEL. Also when fatty acids were analyzed by gas chromatography, 20:5 was enriched in remaining triacylglycerol and in diacylglycerol after incubation with lipase-colipase alone. The data thus indicate that both lipase-colipase and CEL participate in the hydrolysis of 20:5 and 20:4 ester bonds of dietary triacylglycerol.
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1779
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Chen Q, Yuan Z. [Bioelectric potentials of bone in experimental fracture healing]. ZHONGHUA YI XUE ZA ZHI 1990; 70:183-5, 14. [PMID: 2167753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A specific electric potential gradient exists on the surface of long bone and the electric gradient changes after fracture. The electric potentials at the fracture site were measured and it was shown to change most actively during the early healing phase, and thereafter reached the normal level gradually. When soft tissue was damaged, certain potential changes occurred. But this change was different from that in the fracture site, indicating that the tissue has "biological window" effect of electrization.
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1780
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Zhang Z, Wang L, Chen Q, Feng S, Cao Z, Zhou X, Hu G, Jiang P, Cao Y. [Electron microscopic observation of the effects of Rhodiola kirilowii (Regel.) Maxim. in preventing damage of the rat viscera by a hypoxic high altitude environment]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:177-81, 192. [PMID: 2085406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This paper has shown that the pathologic damages done to rat's viscera due to hypoxic environment of altitude can be reduced significantly by oral administrations of Shengmaiyin, Danshen-Chuanxiong mixture and Rhodiola kirilowii. Shengmaiyin that maintains interior substances in the plate layer bodies proves more effective than Danshen-Chuanxiong mixture, while the latter excels in preventing capillary contraction, thus improving blood circulation. Rhodiola kirilowii has the effects of both Shengmaiyin and Danshen-Chuanxiong mixtures.
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1781
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Chen Q, Huang G. [Measurement and clinical application of MEFV and PEFV curves in young children]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1990; 21:83-7. [PMID: 2365348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Previous studies of children's ventilatory functions revealed that a history of pediatric respiratory illness could cause an adult airway to be highly susceptible to the adverse effects of a variety of bronchial stimulants and infectious agents and easy to develop obstructive airway diseases in adult life. Ten indexes of ventilatory function were measured with MEFV and PEFV curves in 333 normal young children aged between 3 and 6, and 15 sick children of bronchopneumonitis in the same age range. Multiple regression equations of different indexes of normal children were set up. The measured values of various indexes of the sick children were much lower than the correspondent predicted values calculated from multiple regression equations, especially VT, VmaxFRC and VmaxFRC/FRC (P less than 0.05). The results suggest that the measurement of PEFV is a convenient and sensitive method to test children's ventilatory function.
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1782
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Zhang M, Yin Z, Hu G, Chen Q. Phonon natures in Raman spectra of Y-Ba-Cu-O compounds. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:2003-2008. [PMID: 9993929 DOI: 10.1103/physrevb.41.2003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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1783
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Geerts J, Chen Q, van Kasteren J, van der Wiele K. Thermodynamics and kinetic modeling of the homogeneous gas phase reactions of the oxidative coupling of methane. Catal Today 1990. [DOI: 10.1016/0920-5861(90)85047-r] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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1784
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Chen Q, Cheng JT, Tasi LH, Schneider N, Buchanan G, Carroll A, Crist W, Ozanne B, Siciliano MJ, Baer R. The tal gene undergoes chromosome translocation in T cell leukemia and potentially encodes a helix-loop-helix protein. EMBO J 1990; 9:415-24. [PMID: 2303035 PMCID: PMC551682 DOI: 10.1002/j.1460-2075.1990.tb08126.x] [Citation(s) in RCA: 203] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
We have analyzed t(1;14)(p32;q11) chromosome translocations from two patients with T cell acute lymphocytic leukemia. The chromosome 1 breakpoints of these patients lie within a kilobasepair of each other, and thus define a genetic locus (designated tal) involved in T cell oncogenesis. Moreover, we have identified sequences within tal that potentially encode an amphipathic helix-loop-helix motif, a DNA-binding domain found in a variety of proteins that control cell growth and differentiation. The homology domain of tal is especially related to that of lyl-1, a gene on chromosome 19 that has also been implicated in T cell oncogenesis. Hence, tal and lyl-1 encode a distinct family of helix-loop-helix proteins involved in the malignant development of lymphocytes.
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MESH Headings
- Amino Acid Sequence
- Base Sequence
- Chromosome Mapping
- Chromosomes, Human, Pair 1
- Chromosomes, Human, Pair 14
- DNA, Neoplasm/genetics
- DNA, Neoplasm/isolation & purification
- DNA-Binding Proteins/genetics
- Genes
- Humans
- Leukemia-Lymphoma, Adult T-Cell/genetics
- Molecular Sequence Data
- Neoplasm Proteins/genetics
- Nucleic Acid Hybridization
- Oligonucleotide Probes
- Polymerase Chain Reaction
- Protein Conformation
- RNA, Neoplasm/genetics
- RNA, Neoplasm/isolation & purification
- Sequence Homology, Nucleic Acid
- Translocation, Genetic
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1785
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Chen Q. [Mitochondrial encephalomyopathy. Report of a case]. ZHONGHUA SHEN JING JING SHEN KE ZA ZHI = CHINESE JOURNAL OF NEUROLOGY AND PSYCHIATRY 1990; 23:38-40, 63. [PMID: 2347280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A typical case of mitochondrial encephalomyopathy with lactic acidemia and stroke-like episodes (MELAS) was reported. The main clinical manifestations consisted of short stature, psychomotor deterioration, sensorineural deafness, and hemiparesis. The laboratory findings disclosed abnormal lactic acid tolerance abnormal EEG, VEP, AEP, SEP, and MCV. The CT scan showed multiple intracerebral infarcts, basal ganglia calcifications, and cerebral atrophy. A muscle biopsy was performed. The frozen sections with modified gomori trichrome stain revealed ragged-red-fiber which reacted strongly positive in NADH-TR stain. The electron microscopy revealed subsarcolemmal aggregation of mitochondria of various sizes with paracrystalline inclusions, abnormally arranged cristae, and osmiophilic dense-bodies in their matrices.
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1786
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Chen Q, Dereski M, Wilson B, Patterson M, Chopp M, Hetzel F. In vivo optical properties of normal rat brain and application in photodynamic therapy. Int J Radiat Oncol Biol Phys 1990. [DOI: 10.1016/0360-3016(90)90908-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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1787
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Dereski MO, Chopp M, Chen Q, Hetzel FW. Normal brain tissue response to photodynamic therapy: histology, vascular permeability and specific gravity. Photochem Photobiol 1989; 50:653-7. [PMID: 2533693 DOI: 10.1111/j.1751-1097.1989.tb04322.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The response of photodynamic therapy on normal brain was investigated in 140 Fisher rats. The rats were injected i.p. with Photofrin II (12.5 mg/kg) and 48 h later the dural area over the frontal cortex was photoactivated with red light (630 +/- 1 nm) from an argon dye laser. Treatment was performed with optical energy densities of 140 and 70 J/cm2. Histopathology, vascular permeability and specific gravity measurements were conducted on different populations of rats at 4 h, 24 h, 72 h and 1 week after photodynamic therapy (PDT). Histopathology revealed similar gross and microscopic pathology associated with light energies of 70 and 140 J/cm2 after all time points. A large cerebral infarct approximately the size of the brain surface area treated, evolved 24 h following treatment. Evans blue extravasation indicated a small area of vascular permeability evident as early as 4 h following PDT treatment at both energy levels, with increasing permeability evident at later time points. Specific gravity measurements taken on a representative area of the lesion indicated a significant (P less than 0.01) amount of edema present at 24 h post treatment with a gradual reduction approaching control values over the time period of 1 week. The data indicate a significant amount of damage to normal brain from low PDT treatment doses.
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1788
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Abstract
Cupric ion (Cu2+), in complex form, functions as a selective oxidizing agent for a variety of compounds in the qualitative Benedict test. Cupric ion is reduced to cuprous ion (Cu+) in the reaction. We found that the cuprous ion formed in this type of redox reaction could be detected and quantified using 2,2'-bicinchoninic acid. This reagent produced an intense purple complex with cuprous ion. The color development in this modified Benedict test was dependent on pH, temperature, and time. The reaction is insensitive to ethanol and sodium dodecyl sulfate. This improved method of the Benedict test has enhanced sensitivity and makes the quantitation of compounds possible. This method should be useful for studies of Benedict-positive compounds which are available only in small amounts.
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1789
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Chen Q, Sternby B, Nilsson A. Hydrolysis of triacylglycerol arachidonic and linoleic acid ester bonds by human pancreatic lipase and carboxyl ester lipase. BIOCHIMICA ET BIOPHYSICA ACTA 1989; 1004:372-85. [PMID: 2503032 DOI: 10.1016/0005-2760(89)90086-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The hydrolysis of polyenoic fatty acid ester bonds with pure human colipase-dependent lipase, with carboxyl ester lipase (CEL) and with these enzymes in combination was studied, using [3H]arachidonic- and [14C]linoleic acid-labelled rat chylomicrons as a model substrate. During the hydrolysis with colipase-dependent lipase, the amount of 3H appearing in 1,2-X-diacylglycerol (DG) markedly exceeded that of 14C. When CEL was added in addition this [3H]DG was efficiently hydrolyzed. CEL alone hydrolyzed the triacylglycerol (TG) at a low rate. The hydrolysis pattern with human duodenal content was similar to that seen with colipase-dependent lipase and CEL in combination. Increasing the concentration of taurodeoxycholate (TDC) and taurocholate (TC) or of TDC alone stimulated the hydrolysis of [3H]- and [14C]TG, but increased the accumulation of labelled DG that could act as substrate for CEL. It is suggested that very-long-chain polyenoic fatty acids of DG formed during the action of the colipase-dependent lipase on TG containing these fatty acids may be a physiological substrate for CEL.
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1790
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Chen Q, Fan YL. Molecular cloning and expression of Bacillus thuringiensis subsp. galleriae insecticidal crystal protein genes in Escherichia coli. SCIENCE IN CHINA. SERIES B, CHEMISTRY, LIFE SCIENCES & EARTH SCIENCES 1989; 32:830-6. [PMID: 2554939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The location of the toxin gene of B. thuringiensis subsp. galleriae (H5ab) on the Mr-130Md plasmid is determined by molecular cloning. Double digestion fragments (BamHI and SalI) and PstI restriction fragments as well, from the 130 Md plasmid, of B. thuringiensis subsp. galleriae, are ligated with the cloning vector pAT 153 respectively and transformed into E. coli strain HB 101. Out of 208 transformants, three colonies (FG2, FG9, FG19) give positive hybridization reaction using the HD-1 delta-endotoxin gene as a probe. They are presumed to contain the delta-endotoxin gene of B. thuringiensis subsp. galleriae. Western blot assays indicate that Mr-130 kDal and 68 kDal, crystal proteins produced by clone FG2 react with anticrystal protein antibody. The protein extracts of clone FG2 are lethal to Ostrinia furnacalis (Guenee). This is the first report with regard to the cloning and expression of the B. thuringiensis subsp. galleriae (H5ab) delta-endotoxin gene.
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1791
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Li WH, Ming ZL, Chen Q, Li Y. Experimental studies on the prevention and treatment of chickenpox and herpes zoster with measles vaccine. Chin Med J (Engl) 1989; 102:395-9. [PMID: 2509165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
In 151 chickenpox patients treated with live attenuated measles vaccine, the cure rate was 100%. In 145 cases of herpes zoster, the effective rate was 100% (completely cured in 91.7% and improved in 8.3%). In the treated group, the time needed for the subsidence of fever and skin rash and the duration of the disease were markedly shorter than those in the control group (P less than 0.01). It is particularly effective for alleviating pain, preventing and relieving postherpetic neuralgia in patients with zoster. The application of measles vaccine to the patients in the chickenpox incubation period might prevent the development of the disease, and decrease the incidence and death rate of varicella zoster virus infection in highly susceptible patients. The mechanism of its anti-viral action and production of interferon in the body is discussed.
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1792
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Vierling E, Harris LM, Chen Q. The major low-molecular-weight heat shock protein in chloroplasts shows antigenic conservation among diverse higher plant species. Mol Cell Biol 1989; 9:461-8. [PMID: 2710111 PMCID: PMC362621 DOI: 10.1128/mcb.9.2.461-468.1989] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Several plant species are known to synthesize low-molecular-weight nucleus-encoded heat shock proteins (HSPs) which localize to chloroplasts. DNA sequence analysis of chloroplast HSP cDNAs from pea (Pisum sativum) and soybean (Glycine max) has shown that the carboxyl-terminal halves of these proteins are homologous to low-molecular-weight HSPs from a wide range of eucaryotes (E. Vierling, R. T. Nagao, A. E. DeRocher, and L. M. Harris, EMBO J. 7:575-581, 1988). We used a pea cDNA to construct fusion proteins containing either the carboxyl-terminal heat shock domain or the amino-terminal domain of the chloroplast HSP. The fusion proteins were overexpressed in Escherichia coli and used to produce choloroplast HSP-specific polyclonal antibodies. The carboxyl-terminal antibodies recognized chloroplast HSP precursor proteins from pea and from three divergent plant species, Arabidopsis thaliana, petunia (Petunia hybrida), and maize (Zea mays). The amino-terminal antibodies recognized effectively only the pea precursor. When intact plants of each species were subjected to a heat stress regime mimicking field growth conditions, significant levels of the mature forms of the chloroplast HSPs accumulated in pea, A. thaliana, and maize. The levels of accumulated HSPs remained unchanged for 12 h following the stress treatment. We conclude that the synthesis of chloroplast-localized HSPs is an important component of the stree response in all higher plants and that chloroplast HSPs from dicotyledonous and monocotyledonous plants have a conserved carboxyl-terminal domain.
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1793
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Chen Q. [Determination of Se Zn Cu concentrations in serum of middle school teachers in Beijing City]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 1989; 23:16-8. [PMID: 2731452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The concentrations of serum selenium, zinc and copper were measured in 187 teachers (representative group of population) from six middle schools in Beijing city. The means, standard deviations, normal ranges were found out. The result was compared with that in the recent literature. Since serum selenium concentrations were found close to the lower limit of the normal range, it is suggested that to increase adequately the daily intake of dietary selenium will be beneficial for safeguarding one's health against the related diseases.
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1794
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Chen Q. [Surgical treatment of aneurysm of the membranous ventricular septum: report of 27 cases]. ZHONGHUA WAI KE ZA ZHI [CHINESE JOURNAL OF SURGERY] 1989; 27:31-3, 61. [PMID: 2776524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Twenty-seven patients aged 4 to 26 years with aneurysm of the membranous ventricular septum were operated on in Shanghai Chest Hospital, from August 1985 to April 1987. Of the patients, 22 were diagnosed by left ventriculography, and were found to be associated with other cardiac defects such as VSD, ASD. All the patients had an uneventful early postoperative course and excellent late results. It is emphasized that a thorough recognition of the lesion and complete repair of the malformation are important in the avoidance of residual shunt and recurrent defects.
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1795
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Rincón M, Chen Q, Boss WF. Characterization of Inositol Phosphates in Carrot (Daucus carota L.) Cells. PLANT PHYSIOLOGY 1989; 89:126-32. [PMID: 16666502 PMCID: PMC1055807 DOI: 10.1104/pp.89.1.126] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
We have shown previously that inositol-1,4,5-trisphosphate (IP(3)) stimulates an efflux of (45)Ca(2+) from fusogenic carrot protoplasts (M Rincón, WF Boss [1987] Plant Physiol 83: 395-398). In light of these results, we suggested that IP(3) might serve as a second messenger for the mobilization of intracellular Ca(2+) in higher plant cells. To determine whether or not IP(3) and other inositol phosphates were present in the carrot cells, the cells were labeled with myo-[2-(3)H]inositol for 18 hours and extracted with ice-cold 10% trichloroacetic acid. The inositol metabolites were separated by anion exchange chromatography and by paper electrophoresis. We found that [(3)H]inositol metabolites coeluted with inositol bisphosphate (IP(2)) and IP(3) when separated by anion exchange chromatography. However, we could not detect IP(2) or IP(3) when the inositol metabolites were analyzed by paper electrophoresis even though the polyphosphoinositides, which are the source of IP(2) and IP(3), were present in these cells. Thus, [(3)H] inositol metabolites other than IP(2) and IP(3) had coeluted on the anion exchange columns. The data indicate that either IP(3) is rapidly metabolized or that it is not present at a detectable level in the carrot cells.
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1796
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Hatzinger PB, Chen Q, Dong LQ, Stevens JL. Alterations in intermediate filament proteins in rat kidney proximal tubule epithelial cells. Biochem Biophys Res Commun 1988; 157:1316-22. [PMID: 2462870 DOI: 10.1016/s0006-291x(88)81018-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Changes in the intermediate filament composition of rat kidney proximal tubule cells in culture have been investigated. The data suggest that differentiated tubular epithelial cells do not express vimentin, but vimentin expression is induced when the cells begin to proliferate in culture. The cultured cells are positive for both cytokeratins and vimentin by immunofluorescence microscopy. The data support the concept that the intermediate filament composition of proximal tubule epithelial cells can be altered during proliferation induced by nephrotoxic chemicals or by neoplastic transformation.
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1797
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Peng HB, Chen Q. Localization of calcitonin gene-related peptide (CGRP) at a neuronal nicotinic synapse. Neurosci Lett 1988; 95:75-80. [PMID: 3265774 DOI: 10.1016/0304-3940(88)90635-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The localization of calcitonin gene-related peptide (CGRP) in the parasympathetic cardiac ganglion of the frog was investigated with an immunofluorescence method. By doubly staining the whole ganglion with antibodies against a synaptic-vesicle antigen and anti-CGRP antibodies, we found that all of the boutons at the nicotinic synapses on the postganglionic neurons contained immunoreactivity against this peptide. In contrast, neither the muscarinic nor the adrenergic terminals of the postganglionic fibers on the cardiac muscle contained CGRP immunoreactivity. This suggests that CGRP is involved in the functions of the neuronal nicotinic synapses.
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1798
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Chen Q. [Protective effects of selenium, zinc and copper on lung cancer]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 1988; 22:221-4. [PMID: 3219962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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1799
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Chen Q, Taljanidisz J, Sarkar S, Tao T, Gergely J. Cloning, sequencing and expression of a full-length rabbit fast skeletal troponin-C cDNA. FEBS Lett 1988; 228:22-6. [PMID: 3277860 DOI: 10.1016/0014-5793(88)80576-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A full-length cDNA coding for troponin-C isolated from an adult rabbit fast skeletal muscle library has been sequenced and expressed in an E. coli host. The amino acid sequence derived from the coding region agrees with the published protein sequence except that the first two residues are reversed. The expressed protein was found to be identical to purified rabbit skeletal troponin-C based on electrophoretic mobilities in polyacrylamide gels containing either SDS or urea, and on immunoblotting. These results establish that our troponin-C cDNA clone is suitable for site-directed mutagenesis studies on the structure and function of troponin-C.
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1800
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Wei HC, Chen Q, Wang LH. [Correlation between selenium levels in the human body and lung cancer. II. Multi-statistical analysis of the correlation between selenium levels in the blood, hair, lung and lung cancer]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 1988; 10:9-11. [PMID: 3416707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
18 factors, including possible lung cancer-causing factors and body selenium (Se) levels, were analyzed by computer-based multiple stepwise regression and main component analysis. 1. The results indicated that Se levels in blood, hair and lung had correlation with lung cancer to some extent. 2. The correlation of blood and lung Se was the most significant one, the significance of which was only second to age and smoking habits. The standardized regression and factor load coefficients showed a negative correlation with blood Se level and a positive one with lung Se level, which corresponded with the results obtained by the single factor analysis.
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