451
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Cui L, Chen NH, Jeon SJ, Silvera IF. Megabar pressure triple point in solid deuterium. PHYSICAL REVIEW LETTERS 1994; 72:3048-3051. [PMID: 10056054 DOI: 10.1103/physrevlett.72.3048] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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452
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Puapairoj P, Cui L, Ogawa K, Akagi K, Hasegawa R, Ito N. Effect of ethanol on paraquat toxicity in F344 rats. Food Chem Toxicol 1994; 32:379-86. [PMID: 8206434 DOI: 10.1016/0278-6915(94)90077-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The potential modifying effects of ethanol and paraquat on lesion development in livers and lungs of male F344 rats were studied. Animals were divided into diethylnitrosamine (DEN)-initiated and non-initiated groups, subgroups of each being exposed to 10 ml 20% ethanol/kg body weight, 2.5 or 10 mg paraquat/kg body weight or a combination of 10 ml 20% ethanol/kg body weight and 2.5 or 10 mg paraquat/kg body weight, given by intragastric intubation three times a week. Controls received 10 ml saline/kg body weight. All animals were subjected to two-thirds partial hepatectomy at the end of wk 3 and killed at the end of wk 8. All five rats receiving 10 mg paraquat/kg body weight without DEN-pretreatment died before termination of the experiment, but the additional ethanol treatment saved animals: only one of five rats died. Rats administered 2.5 or 10 mg paraquat/kg body weight demonstrated lung toxicity, as evidenced by fibrosis and hyperplasia, but not when simultaneously treated with ethanol in DEN-pretreated groups. In the liver, however, evaluation of glutathione S-transferase placental form (GST-P)-positive foci did not reveal any influence of the treatments on lesion development in DEN-initiated animals. It is concluded that ethanol decreases paraquat toxicity, and that neither agent, alone or in combination, exerts any hepatocarcinogenic modification potential.
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453
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Wang Y, Gaugler R, Cui L. Variations in Immune Response of Popillia japonica and Acheta domesticus to Heterorhabditis bacteriophora and Steinernema Species. J Nematol 1994; 26:11-18. [PMID: 19279863 PMCID: PMC2619469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
The infectivities of Steinernema carpocapsae, S. glaseri, S. scapterisci, and Heterorhabditis bacteriophora to Japanese beetle larvae, Popillia japonica, and house cricket adults, Acheta domesticus, were compared using external exposure and hemocoelic injection. Only H. bacteriophora and S. glaseri caused high P. japonica mortality after external exposure. When nematodes were injected, P. japonica had a strong encapsulation and melanization response to all species except S. glaseri. Heterorhabditis bacteriophora and S. carpocapsae were able to overcome the immune response, but S. scapterisci was not. All species except S. scapterisci were able to kill and reproduce within the host. Only S. scapterisci and S. carpocapsae caused A. domesticus mortality after external exposure. When nematodes were injected, A. domesticus had a strong immune response to all species except S. scapterisci. Steinernema carpocapsae effectively overcame the strong immune response and caused high host mortality, but S. glaseri and H. bacteriophora did not. Steinernema scapterisci caused high host mortality and reproduced, S. glaseri and H. bacteriophora caused low host mortality but only S. glaseri reproduced, and S. carpocapsae was able to kill the host but reproduced poorly. Most (ca. 90%) of the S. carpocapsae in the hemocoel of P. japonica became encapsulated and melanized within 8 hours postinjection. The symbiotic bacterium, Xenorhabduf nematophilus, was often released before this encapsulation and melanization.
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454
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Cui L, Hasegawa R, Zajdela F, Puapairoj P, Shirai T, Ito N. Lack of promoting activity of 7-methoxy-2-nitro-naphtho-[2,1-b]furan (R7000) in a medium-term rat liver bioassay. Cancer Lett 1994; 76:161-6. [PMID: 8149345 DOI: 10.1016/0304-3835(94)90393-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Among the nitro-naphthofurans, 7-methoxy-2-nitro-naphtho[2,1-b]furan (R7000) has proved to be a very potent mutagen that causes sarcomas at the subcutaneous injection site and carcinomas in the forestomach after p.o. administration. In the present study, possible promoting activity for diethylnitrosamine (200 mg/kg, i.p.)-initiated liver carcinogenesis was assessed in rats. R7000 dissolved in 5% ethanol solution at doses of 10 or 50 mg/l given as the drinking water for 6 weeks did not enhance development of pre-neoplastic glutathione S-transferase placental form positive foci. Thus, it was concluded that R7000 may not be carcinogenic for the rat liver under the present experimental conditions.
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455
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Park S, Como PG, Cui L, Kurlan R. The early course of the Tourette's syndrome clinical spectrum. Neurology 1993; 43:1712-5. [PMID: 8414018 DOI: 10.1212/wnl.43.9.1712] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
We retrospectively studied 101 children with Tourette's syndrome to characterize the early course of illness and associated behavioral disturbances of attention deficit hyperactivity disorder (ADHD), obsessive-compulsive disorder (OCD), disruptive behavior (DB), and school problems (SP). For patients without ADHD (45%), OCD (50%), DB (67%), or SP (52%) at the time of initial evaluation, 13% developed ADHD, 8% OCD, 28% DB, and 25% SP during the observation period of 1.6 +/- 1.3 years (range, 0.5 to 7 years). For patients with behavioral disturbances initially, the problems were controlled or resolved for many over time and with therapy: ADHD, 46%; OCD, 47%; DB, 50%; and SP, 67%. Medication changes, assessed after a drug adjustment period between the initial and first follow-up visits (6 +/- 6 months), showed that drug dosages remained largely unchanged and few patients required the addition of new drugs: tic suppressants, 10%; anti-obsessional agents, 5%; and stimulants, 12%. Tic suppressants were withdrawn from 12%.
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456
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Hoshiya T, Hasegawa R, Hakoi K, Cui L, Ogiso T, Cabral R, Ito N. Enhancement by non-mutagenic pesticides of GST-P positive hepatic foci development initiated with diethylnitrosamine in the rat. Cancer Lett 1993; 72:59-64. [PMID: 8402576 DOI: 10.1016/0304-3835(93)90011-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The potential hepatocarcinogenicity of seven pesticides was examined using a rapid bioassay based on the induction of glutathione S-transferase placental form positive foci in the rat liver. Rats were initially injected with diethylnitrosamine and two weeks later were fed on diet supplemented with one of the pesticides for 6 weeks and then killed; all rats were subjected to a partial hepatectomy at week 3. Positive results were seen with chlorobenzilate (2000 ppm), vinclozolin (2000 ppm), malathion (4000 ppm), tecnazene (2000 ppm) and isoproturon (2000 ppm). S,S,S-tributylphosphorotrithioate (DEF, 200 ppm) and dicloran (2000 ppm) were negative in both number and area analyses. Although chlorobenzilate is carcinogenic in mice, malathion and vinclozolin have been reported as non-carcinogens in both rats and mice. Since the present system is based on the two-stage carcinogenesis hypothesis, it is possible that the chemicals showing positive results in this system possess at least tumor-promoting activity in the rat liver. This is very significant, as most carcinogens show tumor-promoting activity in their target organs.
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457
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Xu JH, Cui L, Jia BH. [Effect of tonifying kidney on compliability of the aged]. ZHONGGUO ZHONG XI YI JIE HE ZA ZHI ZHONGGUO ZHONGXIYI JIEHE ZAZHI = CHINESE JOURNAL OF INTEGRATED TRADITIONAL AND WESTERN MEDICINE 1993; 13:208-11, 195-6. [PMID: 8400768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
UNLABELLED The clinical study of 80 aged individuals divided into treated group (Group I) and normal control (Group II) was carried out. According to the symptoms of Kidney Deficiency the aged was subdivided into Kidney Deficiency group (KDG) and non-Kidney Deficiency group. A semi-quantitative method and some indexes about compliability were used to evaluate the symptoms. RESULTS After treatment the main symptoms of Kidney Deficiency such as lumbago, cold limbs, fatigue, cold aversion, feverish sensation in chest, palms and soles, etc. were significantly alleviated (P < 0.05) and the speed of reaction (SR) that reflects NS function in Group I and its KDG was also significantly improved. After exercise test, the ultrasono-cardiogram showed that in KDG of Group I, the ascending range of heart rate (HR) lessened during exercise and recovered more rapid than that before treatment. The difference was significant (P < 0.05). The HR was also significant different between the KDG groups of Group I and II during resting, exercise and recovering status (P < 0.05). Furthermore, after treatment the level of salival progesterone of the aged female was significantly. The determination of bone mineral content showed that in KDG after treatment, the density of ulnar line was remarkably elevated. These results showed that through tonifying Kidney and replenishing Qi could improve the functions of heart, brain, bone and endocrine systems of the aged persons, therefore improve their compliability.
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458
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Cui L, Li Y, Liu B. [Localization and nucleotide sequence of propionyl acylase gene of Streptomyces mycarofaciens]. YI CHUAN XUE BAO = ACTA GENETICA SINICA 1993; 20:561-570. [PMID: 8179938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Our research showed that propionyl acylase gene is on 4.16kb insert DNA fragment originated from S. mycarofaciens in recombinant plasmid pIJM9. For localization of this gene on 4.16kb insert DNA fragment, sub-cloning has been carried out with religation of BamHI digested plasmid pIJM9. Among the transformants, molecular weight of recombinant plasmid pIJM95 harbouring in No. 5 transformant is 5.0kb. Molecular weight of insert DNA fragment is 0.53kb in this plasmid. In bioconversion experiment for spiramycin of No. 5 transformant, the bioconversion product was analysed with TLC, bioautography, HPLC and mass spectrum (FAB). Results showed that the bioconvert product is propionylspiramycin. No. 5 transformant is able to transform spiramycin into propionylspiramycin. Propionyl acylase gene was locolized on 0.53kb insert DNA fragment of recombinant plasmid pIJM95. Analysis result of DNA sequence showed that content of G + C is 68.2% for 0.53kb insert DNA fragment. More than 70 kinds of restriction endonuclease have cut sit on this fragment. From No.54-No.393 nucleotide, there is an open reading frame, which codes a polypeptide consisted of 122 amino acids. Start codon is ATG, stop codon is TGA.
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459
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Cui L. [Magnetic stimulation motor evoked potential in multiple sclerosis. Comparison with visual evoked potentials, brain stem auditory evoked potentials and somatosensory evoked potentials]. ZHONGHUA SHEN JING JING SHEN KE ZA ZHI = CHINESE JOURNAL OF NEUROLOGY AND PSYCHIATRY 1992; 25:130-2, 189. [PMID: 1395937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This study consists of 45 patients with clinically definite MS, laboratory supported definite MS and clinically probable MS. We compared MEP results with other multimodal evoked potentials (VEP, BAEP and SEP). The abnormal rate of MEP was 87.6%, which was the highest. Abnormal MEP showed prolonged central motor conduction time (CMCT), consistent with pathological change of the demyelination. There was a evident correlation between the abnormal MEP and VEP, which is consistent with the most common MS (Devic Syndrome) in our country.
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460
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Hino O, Kitagawa T, Nomura K, Ohtake K, Cui L, Furuta Y, Aizawa S. Hepatocarcinogenesis in transgenic mice carrying albumin-promoted SV40 T antigen gene. Jpn J Cancer Res 1991; 82:1226-33. [PMID: 1684356 PMCID: PMC5918330 DOI: 10.1111/j.1349-7006.1991.tb01785.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
We have developed transgenic mice that inherit albumin promoter-regulated simian virus 40 (SV40) large T antigen gene, expressed specifically in hepatocytes. These mice all develop multifocal hepatocellular carcinomas at around 5 months and die of liver insufficiency by 7 months. Sequential morphological observation of hepatocarcinogenesis revealed 5 distinct stages: (I) newborn to 2 weeks of age, neither recognizable histological changes nor cellular replication in spite of T antigen expression; (II) between 3 and 7 weeks, diffuse cytomegalic change of hepatocytes with numerous abnormal mitoses, usually resulting in cell death; (III) from 7 weeks onwards, quasi-regenerative small hepatocyte foci with a decreased tendency for cytomegaly in spite of T antigen expression, rapidly replacing the hepatic tissue; (IV) 11 weeks of age and thereafter, neoplastic foci and nodules with enzymatic alteration; (V) 20 weeks of age and thereafter, gross hepatocellular carcinomas with occasional pulmonary metastases. Considerable variation existed both in morphological and enzymatic features and T antigen expression among neoplastic lesions, including carcinomas. Thus, these transgenic mice clearly show a multistep process in hepatocarcinogenesis with remarkable synchrony and provide a promising model for analyzing the essential events of carcinogenesis at different stages.
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MESH Headings
- Animals
- Antigens, Polyomavirus Transforming/genetics
- Biomarkers, Tumor/analysis
- Blotting, Northern
- Crosses, Genetic
- Female
- Glucose-6-Phosphatase/analysis
- Liver/cytology
- Liver/microbiology
- Liver/pathology
- Liver Neoplasms, Experimental/genetics
- Liver Neoplasms, Experimental/microbiology
- Liver Neoplasms, Experimental/pathology
- Male
- Mice
- Mice, Inbred Strains
- Mice, Transgenic
- Mitotic Index
- Plasmids
- Promoter Regions, Genetic
- Restriction Mapping
- Serum Albumin/genetics
- Simian virus 40/genetics
- gamma-Glutamyltransferase/analysis
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461
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Dong C, Cui L, Li S, Wang S. [Influence of zhuangling agent to metabolism of lipid in aged rats]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:500-3, 513. [PMID: 2093328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The influence of Zhuangling Agent to the metabolism of lipid in healthy old rats has been studied. The results indicate that the agent can decrease the level of serum total cholesterol, low-density lipoprotein low-density lipoprotein cholesterol and peroxilipid and meanwhile can increase serum superoxide-dismutase and enhance the activity of acid phosphatase in some parts of the tissues. The result suggests that Zhuangling Agent possibly has an effect of anti-arteriosclerosis.
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462
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Benhorin J, Merri M, Alberti M, Locati E, Moss AJ, Hall WJ, Cui L. Long QT syndrome. New electrocardiographic characteristics. Circulation 1990; 82:521-7. [PMID: 2271025 DOI: 10.1161/01.cir.82.2.521] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The long QT syndrome is electrocardiographically characterized by a prolonged QT interval and by several other, more subtle, ST-T-U wave abnormalities, most of which have not been quantified. To determine the possible usefulness of several new electrocardiographic characteristics in identifying patients with known long QT syndrome, logistic regression models were applied to a data base of seven new, relatively independent, electrocardiographic repolarization variables. These were measured on digitized 12-lead electrocardiograms of 315 normal subjects and 37 patients with the long QT syndrome (members of well-identified long QT syndrome families, QTc greater than 0.44 second, 27% symptomatic), who ranged in age from 17 to 60 years. Electrocardiographic variables that independently differentiated (p less than 0.001) patients with long QT syndrome from normal subjects included quantitative measures of repolarization: early duration, rate, T wave symmetry, late phenomena, and heterogeneity. All selected repolarization variables except the early duration variable were essentially independent of the QTc (r2 less than 0.15), and all contributed significantly to the identification of patients with long QT syndrome. A classification model of five electrocardiographic predictor variables resulted in an estimated sensitivity (95% confidence interval) of 92.6% (81.6-100%) and an estimated specificity (95% confidence interval) of 95.8% (93.6-98.1%). This model performed significantly better than an alternative classification model that was based on the early duration variable as a single predictor variable. The symptomatic status of patients with long QT syndrome could not be predicted by any combination of the electrocardiographic variables in the investigated model.
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463
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Abstract
The C4a anaphylatoxin was purified from rat sera activated by heat-aggregated IgG. The anaphylatoxin was isolated by a three-step purification procedure and was judged to be homogeneous based on visualization of a single stained band after electrophoresis on both cellulose acetate membrane strips and on 9% SDS-polyacrylamide gels. Results from Ouchterlony and radioimmunoassay analysis indicated that neither rat C5A nor C3a contaminated the C4a preparation. Rat C4a is a glycoprotein estimated to be 11,000-12,000 mol. wt and contains 76 amino acid residues representing a mol. wt of 8577 and one oligosaccharide unit of 2000-3000 mol. wt. Rat C4a is weakly active in contracting guinea pig ileum at 0.1-1 microM, which is comparable with the activity of human C4a. Both human and bovine C4a are polypeptides free of carbohydrate while rat and presumably mouse C4a are glycoproteins. The complete primary structure of rat C4a anaphylatoxin has been elucidated as follows: (formula; see text)
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