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Chow TWS, Huang D. Estimating Optimal Feature Subsets Using Efficient Estimation of High-Dimensional Mutual Information. ACTA ACUST UNITED AC 2005; 16:213-24. [PMID: 15732401 DOI: 10.1109/tnn.2004.841414] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A novel feature selection method using the concept of mutual information (MI) is proposed in this paper. In all MI based feature selection methods, effective and efficient estimation of high-dimensional MI is crucial. In this paper, a pruned Parzen window estimator and the quadratic mutual information (QMI) are combined to address this problem. The results show that the proposed approach can estimate the MI in an effective and efficient way. With this contribution, a novel feature selection method is developed to identify the salient features one by one. Also, the appropriate feature subsets for classification can be reliably estimated. The proposed methodology is thoroughly tested in four different classification applications in which the number of features ranged from less than 10 to over 15,000. The presented results are very promising and corroborate the contribution of the proposed feature selection methodology.
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Huang D, Wu W, Lu L. Microdissection and molecular manipulation of single chromosomes in woody fruit trees with small chromosomes using pomelo (Citrus grandis) as a model. II. Cloning of resistance gene analogs from single chromosomes. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2004; 108:1371-1377. [PMID: 14727033 DOI: 10.1007/s00122-003-1562-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2003] [Accepted: 11/21/2003] [Indexed: 05/24/2023]
Abstract
Amplification of resistance gene analogs (RGAs) is both a useful method for acquiring DNA markers closely linked to disease resistance (R) genes and a potential approach for the rapid cloning of R genes in plants. However, the screening of target sequences from among the numerous amplified RGAs can be very laborious. The amplification of RGAs from specific chromosomes could greatly reduce the number of RGAs to be screened and, consequently, speed up the identification of target RGAs. We have developed two methods for amplifying RGAs from single chromosomes. Method 1 uses products of Sau3A linker adaptor-mediated PCR (LAM-PCR) from a single chromosome as the templates for RGA amplification, while Method 2 directly uses a single chromosomal DNA molecule as the template. Using a pair of degenerate primers designed on the basis of the conserved nucleotide-binding-site motifs in many R genes, RGAs were successfully amplified from single chromosomes of pomelo using both these methods. Sequencing and cluster analysis of RGA clones obtained from single chromosomes revealed the number, type and organization of R-gene clusters on the chromosomes. We suggest that Method 1 is suitable for analyzing chromosomes that are unidentifiable under a microscope, while Method 2 is more appropriate when chromosomes can be clearly identified.
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Huang D, Wu W, Zhou Y, Hu Z, Lu L. Microdissection and molecular manipulation of single chromosomes in woody fruit trees with small chromosomes using pomelo (Citrus grandis) as a model. I. Construction of single chromosomal DNA libraries. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2004; 108:1366-1370. [PMID: 14727028 DOI: 10.1007/s00122-003-1550-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2003] [Accepted: 11/21/2003] [Indexed: 05/24/2023]
Abstract
Construction of single chromosomal DNA libraries by means of chromosome microdissection and microcloning will be useful for genomic research, especially for those species that have not been extensively studied genetically. Application of the technology of microdissection and microcloning to woody fruit plants has not been reported hitherto, largely due to the generally small sizes of metaphase chromosomes and the difficulty of chromosome preparation. The present study was performed to establish a method for single chromosome microdissection and microcloning in woody fruit species using pomelo as a model. The standard karyotype of a pomelo cultivar ( Citrus grandis cv. Guanxi) was established based on 20 prometaphase photomicrographs. According to the standard karyotype, chromosome 1 was identified and isolated with fine glass microneedles controlled by a micromanipulator. DNA fragments ranging from 0.3 kb to 2 kb were acquired from the isolated single chromosome 1 via two rounds of PCR mediated by Sau3A linker adaptors and then cloned into T-easy vectors to generate a DNA library of chromosome 1. Approximately 30,000 recombinant clones were obtained. Evaluation based on 108 randomly selected clones showed that the sizes of the cloned inserts varied from 0.5 kb to 1.5 kb with an average of 860 bp. Our research suggests that microdissection and microcloning of single small chromosomes in woody plants is feasible.
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305
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Fux C, Huang D, Monti A, Siegrist H. Difficulties in maintaining long-term partial nitritation of ammonium-rich sludge digester liquids in a moving-bed biofilm reactor (MBBR). WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2004; 49:53-60. [PMID: 15303723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Nitrogen can be eliminated effectively from sludge digester effluents by anaerobic ammonium oxidation (anammox), but 55-60% of the ammonium must first be oxidized to nitrite. Although a continuous flow stirred tank reactor (CSTR) with suspended biomass could be used, its hydraulic dilution rate is limited to 0.8-1 d(-1) (30 degrees C). Higher specific nitrite production rates can be achieved by sludge retention, as shown here for a moving-bed biofilm reactor (MBBR) with Kaldnes carriers on laboratory and pilot scales. The maximum nitrite production rate amounted to 2.7 gNO2-Nm(-2)d(-1) (3 gO2m(-3)d(-1), 30.5 degrees C), thus doubling the dilution rate compared to CSTR operation with suspended biomass for a supernatant with 700 gNH4-Nm(-3). Whenever the available alkalinity was fully consumed, an optimal amount of nitrite was produced. However, a significant amount of nitrate was produced after 11 months of operation, making the effluent unsuitable for anaerobic ammonium oxidation. Because the sludge retention time (SRT) is relatively long in biofilm systems, slow growth of nitrite oxidizers occurs. None of the selection criteria applied - a high ammonium loading rate, high free ammonia or low oxygen concentration - led to selective suppression of nitrite oxidation. A CSTR or SBR with suspended biomass is consequently recommended for full-scale operation.
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Kersten A, Clermont G, Hoste E, Huang D, Milbrandt E, Martich D, Kellum J, Angus D. Crit Care 2004; 8:P76. [DOI: 10.1186/cc2543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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307
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Fischer TB, Arunachalam KV, Bailey D, Mangual V, Bakhru S, Russo R, Huang D, Paczkowski M, Lalchandani V, Ramachandra C, Ellison B, Galer S, Shapley J, Fuentes E, Tsai J. The binding interface database (BID): a compilation of amino acid hot spots in protein interfaces. Bioinformatics 2003; 19:1453-4. [PMID: 12874065 DOI: 10.1093/bioinformatics/btg163] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
SUMMARY To make information about protein interactive function easily accessible, we are mining the primary scientific literature for detailed data about protein interfaces. The Binding Interface Database (BID) organizes the vast amount of protein interaction information into tables, graphical contact maps and descriptive functional profiles. Currently data on 170 interacting protein pairs are available with over 1300 mutations described. AVAILABILITY The BID database is freely available at http://tsailab.org/BID/ To have your protein of interest entered, contact Tiffany Fischer (tiffbrink@neo.tamu.edu) or Jerry Tsai at the email below
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Li X, Li C, Che L, Liu X, Li Z, Huang D, He W, Dao Q. [Observation on efficacy of artemether compound against vivax malaria]. ZHONGGUO JI SHENG CHONG XUE YU JI SHENG CHONG BING ZA ZHI = CHINESE JOURNAL OF PARASITOLOGY & PARASITIC DISEASES 2003; 17:175-7. [PMID: 12563840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To observe the efficacy of artemether compound against vivax malaria. METHODS Each artemether compound tablet contains 120 mg benflumetolum and 20 mg artemether. 132 patients with vivax malaria were divided into 3 groups. Group A, 36 patients received 8 tablets as an initial dose, followed by 4 tablets daily for 2 days; group B, 41 patients received 8 tablets as an initial dose, followed by 3 tablets daily for 4 days; group C, 55 patients receiving chloroguine-primaquine served as control. Two patients of group A were voluntarily to be bitten by Anopheles dirus before and after medication to observe the influence of artemether compound on the sporogony. RESULTS The average defervescence times for groups A, B and C were 22.3 h, 23.2 h and 25.0 h (P > 0.05), respectively, the average parasite clearance times were 33.5 h, 30.5 h and 44.9 h, respectively, the average parasite clearance times of groups A and B were all significantly shorter than that of group C (P < 0.01). The replase rates of groups A, B and C were 84.9%, 78.8% and 22.9%, respectively, followed-up at nine months, the relapse rates of groups A and B were higher than that of group C(P < 0.01). CONCLUSION Two regimens of artemether compound have the advantage of high efficacy against vivax malaria.
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309
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Lavretsky H, Mistry R, Bastani R, Gould R, Gokhman I, Huang D, Maxwell A, McDermott C, Rosansky J, Jarvik L. Symptoms of depression and anxiety predict mortality in elderly veterans enrolled in the UPBEAT program. Int J Geriatr Psychiatry 2003; 18:183-4. [PMID: 12571829 DOI: 10.1002/gps.706] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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310
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311
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Liu L, Wang R, Huang D, Han D, Ferguson EJ, Shi H, Yang W. Analysis of intra-operative bleeding and recurrence of juvenile nasopharyngeal angiofibromas. CLINICAL OTOLARYNGOLOGY AND ALLIED SCIENCES 2002; 27:536-40. [PMID: 12472527 DOI: 10.1046/j.1365-2273.2002.00611.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The purpose of this study is to present our experience with 34 patients diagnosed with juvenile nasopharyngeal angiofibromas and treated in the Chinese PLA General Hospital between 1986 and 1999, and to examine the factors influencing intra-operative bleeding and tumour recurrence. The age of the patient, the duration of symptoms and tumour stage were related to the amount of intra-operative bleeding. The tumours were totally resected in 30 patients and recurred in five patients (16.7%), with a mean follow-up time of 77 months. The mean time to tumour recurrence after operation was 3.2 months (1-6 months). The incidence of recurrence had no correlation with the age of the patient, duration of symptoms, peri-operative treatment or surgical approaches (P > 0.05); but strongly correlated with tumour stage (P < 0.05).
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312
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Morahan G, Boutlis CS, Huang D, Pain A, Saunders JR, Hobbs MR, Granger DL, Weinberg JB, Peshu N, Mwaikambo ED, Marsh K, Roberts DJ, Anstey NM. A promoter polymorphism in the gene encoding interleukin-12 p40 (IL12B) is associated with mortality from cerebral malaria and with reduced nitric oxide production. Genes Immun 2002; 3:414-8. [PMID: 12424623 DOI: 10.1038/sj.gene.6363909] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Interleukin-12 (IL-12) is an important regulatory cytokine in infection and immunity. Administration of IL-12 may reduce complications of severe malaria in rodents. Polymorphisms in IL12B, the gene encoding the IL-12 p40 subunit, influence the secretion of IL-12 and susceptibility to Type 1 diabetes. We therefore investigated whether IL12B polymorphisms may affect the outcome of severe malaria. Homozygosity for a polymorphism in the IL12B promoter was associated with increased mortality in Tanzanian children having cerebral malaria but not in Kenyan children with severe malaria. Furthermore, homozygotes for the IL12B promotor polymorphism had decreased production of nitric oxide, which is in part regulated by IL-12 activity. These studies suggest that IL12B polymorphisms, via regulation of IL-12 production, may influence the outcome of malaria infection in at least one African population.
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313
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Liu F, Li J, Shi W, Chia M, Medin J, Huang D, Klamut H, Yeh W, Richardson C, O’Sullivan B, Gullane P, Neligan P. Targeted Adv.oriPncFASL and ionizing radiation cure nasopharyngeal carcinoma xenograft tumours. Int J Radiat Oncol Biol Phys 2002. [DOI: 10.1016/s0360-3016(02)03187-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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314
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Huang D, Patino-Flynn V, Markoe A, Wolfson A, Wen B, Wu X, Watzich M, Lutgens C, Johnson T, Tse D. Radiotherapy for grave’s ophthalmopathy: should the entire extraocular muscles be included in the radiation fields. Int J Radiat Oncol Biol Phys 2002. [DOI: 10.1016/s0360-3016(02)03582-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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315
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Huang D, Ghosh G, Huxford T, Chen Y. NF-kB regulation by IkB-α and IkB-β. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302097210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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316
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Huang D, Ma X, Cai L. [Evaluation of the effect of causes of death of advanced schistosomiasis patients on the life span of population by using potential years of life lost analysis]. ZHONGGUO JI SHENG CHONG XUE YU JI SHENG CHONG BING ZA ZHI = CHINESE JOURNAL OF PARASITOLOGY & PARASITIC DISEASES 2002; 16:449-53. [PMID: 12078292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
AIM To evaluate the effect of the causes of death of advanced schistosomiasis patients on the life span of population in an area where schistosomiasis had been under control by applying the indicators of potential years of life lost (PYLL) and rate of PYLL (PYLLR). METHODS Using the formula of calculation of PYLL and PYLLR, the causes of death of 487 patients of advanced schistosomiasis in 3 previously endemic townships of Shanghai suburb. RESULTS Of 487 cases who died between 1955 and 1995, the PYLLR of all causes of death was 256.3@1000. The main causes of death were hepatic failure (100.3@1000), liver carcinoma (43.4@1000) and cancer of other organs (24.8@1000). In the 1960s, the PYLLR of advanced schistosomiasis complicated with hepatic failure and upper digestive tract hemorrhage was 222.2@1000 and 34.5@1000, the PYLLR of the complications of schistosomal liver cirrhosis, hepatic failure and hemorrhage accounted for 67.5% of the total PYLLR, being apparently higher in the non-splenectomy group than in the splenctomty group. After the schistosomiasis was under control, both PYLL and PYLLR decreased linearly. As compared with the 1960s, the PYLLR of all causes of death and the causes of death of the complications of schistosomal liver cirrhosis in the 1990s has declined by 62.9% and 83.2%, respectively, the PYLLR of upper digestive tract hemorrhage was found only 0.3@1000 in the last 5 years. CONCLUSION PYLL and PYLLR analysis could be used to quantify the effect of complications of advanced schistosomiasis and other causes of death on the life span of population.
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317
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Ymer SI, Huang D, Penna G, Gregori S, Branson K, Adorini L, Morahan G. Polymorphisms in the Il12b gene affect structure and expression of IL-12 in NOD and other autoimmune-prone mouse strains. Genes Immun 2002; 3:151-7. [PMID: 12070779 DOI: 10.1038/sj.gene.6363849] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2001] [Accepted: 12/02/2001] [Indexed: 11/08/2022]
Abstract
Interleukin (Il)-12 is a heterodimeric cytokine composed of 35 and 40 kD chains that plays a key role in the induction of Th1 cells, a T cell subset involved in many autoimmune diseases. We report here the cDNA sequence encoding the IL-12 p40 subunit from the autoimmune-prone non-obese diabetic (NOD) mouse, which spontaneously develops type 1 diabetes. Compared with the C57BL/6 sequence, there are two base changes that lead to amino acid replacements. Other autoimmune-prone strains, but not the diabetes-resistant NOR strain, share the same allele as NOD. We found both trans- and cis- allele-dependent effects on levels of basal and induced IL-12p40 expression. Furthermore, we show that one of these changes results in a structural change in the p40 molecule, as evidenced by the failure of a monoclonal antibody to bind NOD IL-12. These findings have implications for the predisposition to autoimmune responses in NOD and other autoimmune-prone mouse strains.
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318
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Moron MC, Palacio F, Pons J, Casabo J, Solans X, Merabet KE, Huang D, Shi X, Teo BK, Carlin RL. Bimetallic Derivatives of [M(en)3]3+ Ions (M = Cr, Co): An Approach to Intermolecular Magnetic Interactions in Molecular Magnets. Inorg Chem 2002. [DOI: 10.1021/ic00082a021] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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319
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Huang D, Frenklach M, Maroncelli M. Energetics of acetylene-addition mechanism of diamond growth. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100333a039] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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320
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Visconti P, Huang D, Yun F, Reshchikov M, King T, Cingolani R, Jasinski J, Liliental-Weber Z, Morko� H. Rapid Delineation of Extended Defects in GaN and a Novel Method for Their Reduction. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/1521-396x(200203)190:1<5::aid-pssa5>3.0.co;2-h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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321
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Liou TG, Adler FR, Cahill BC, FitzSimmons SC, Huang D, Hibbs JR, Marshall BC. Survival effect of lung transplantation among patients with cystic fibrosis. JAMA 2001; 286:2683-9. [PMID: 11730443 PMCID: PMC2522238 DOI: 10.1001/jama.286.21.2683] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
CONTEXT Patients with cystic fibrosis (CF) are the second largest group of lung transplant recipients in the United States. The survival effect of transplantation on a general CF population has not previously been measured. OBJECTIVE To determine the impact of bilateral lung transplantation on survival in patients with CF. DESIGN, SETTING, AND PATIENTS Retrospective observational cohort study of 11 630 CF patients who did not undergo lung transplantation (controls) and 468 transplant recipients with CF from 115 CF centers in the United States, 1992-1998. Patients were stratified into 5 groups based on a 5-year survival prediction model (survival group 1: <30%; survival group 2: 30 to <50%; survival groups 3-5: 50 to <100%.) MAIN OUTCOME MEASURE Five-year survival from date of transplantation in 1992-1997 in the transplant group and from January 1, 1993, in the control group. RESULTS Lung transplantation increased 5-year survival of CF patients in survival group 1. Survival group 2 had equivocal survival effects, and groups 3-5 had negative survival effects from transplantation. From 1994-1997, there was a mean annual prevalence of 238 patients in survival group 1 and mean annual incidence of 154 patients entering the group, approximately 1.5 times the number of lung transplantations performed each year in CF patients (mean, 104). Use of the criterion of forced expiratory volume in 1 second of less than 30% resulted in an equivocal survival benefit and identified 1458 potential candidates for transplantation in 1993. CONCLUSIONS Cystic fibrosis patients in group 1 have improved 5-year survival after lung transplantation. The majority of patients with CF have equivocal or negative survival effects from the procedure. Selection of patients with CF for transplantation based on group 1 survival predictions maximizes survival benefits to individuals and may reduce the demand for scarce donor organs.
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Huang D, Visconti P, Reshchikov M, Yun F, King T, Baski A, Litton C, Jasinski J, Liliental-Weber Z, Morko� H. Polarity of GaN Grown on Sapphire by Molecular Beam Epitaxy with Different Buffer Layers. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/1521-396x(200112)188:2<571::aid-pssa571>3.0.co;2-f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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323
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Wang L, Yang X, Jian H, Yang H, Huang D. [Metabolites produced by bacteria of Xenorhabdus and Photorhabdus]. WEI SHENG WU XUE BAO = ACTA MICROBIOLOGICA SINICA 2001; 41:753-6. [PMID: 12552836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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324
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Zhao H, Huang D, Han D, Han W, Dai P. [Rat hearing loss and hearing organs mitochondrial DNA4834 deletions associated with hypercholesteremia]. ZHONGHUA ER BI YAN HOU KE ZA ZHI 2001; 36:422-5. [PMID: 12761955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
OBJECTIVE To determine whether or not the rat hypercholesteremia contributes to hearing organs mtDNA4834 deletion and involves in the development of hearing loss. METHODS The rat hypercholesteremia model (n = 38) was established by feeding with high cholesterol diet and the control group (n = 22) with common diet for 6 months. The rats were tested for auditory sensitivity using auditory brainstem response (ABR). Twenty-one left cochleae and 27 left cochlear nuclei from experimental group and 10 left cochleae and 13 left cochlear nuclei from control group were harvested. The total DNA of them was extracted. mtDNA was amplified by nest PCR to examine the presence of mtDNA4834 deletion. RESULTS Our result showed: (1) There is a significant increase in serum cholesterol level and ABR threshold in the experimental group. (2) The mitochondrially-encoded tRNA and ND1 segments were amplified from all samples, as well as mtDNA4834 deletions. (3) The incidence of mtDNA4834 deletions in hearing organs of hypercholesteremia rats was significantly higher than that of the control group (P < 0.05). CONCLUSION Extended hypercholesteremia can induce hearing loss, and mtDNA4834 deletion in hearing organs may be one of the pathogenic mechanisms.
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Huang D, Yan H, Wang F. [HCV-PCR-Hybrid.ELISA for the detection of HCV RNA in serum samples from hepatitis patients]. ZHONGHUA SHI YAN HE LIN CHUANG BING DU XUE ZA ZHI = ZHONGHUA SHIYAN HE LINCHUANG BINGDUXUE ZAZHI = CHINESE JOURNAL OF EXPERIMENTAL AND CLINICAL VIROLOGY 2001; 15:365-7. [PMID: 11986729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
BACKGROUND To detect HCV RNA in serum samples from hepatitis patients by using the methods of HCV-Reverse transcription polymerase chain reaction and hybrid ELISA. METHODS HCV RNA in serum samples was amplified by RT-PCR with one of the primer labeled with biotin. PCR amplified products were detected with microtiter plate hybridization with HCV specific probe, then determined with steptavidin-HRP assay. Anti-HCV in these samples was also detected with ELISA simultaneously. RESULTS The positive rates of HCV RNA were 81.8% (72/88) in anti-HCV positive group and 57.9% (88/152) in the whole patients group. Serum HCV RNA and anti-HCV positive rates were compared and the consistent rate was 78.9% (120/152, P>0.05). The positive rate of HCV RNA was higher in H.ELISA (57.9%, 88/152) than that in electrophoresis (35.5%, 54/152)(P<0.01). CONCLUSIONS The HCV-PCR-H.ELISA was a sensitive, specific, stable, semi-quantitative and easy to operate method. This HCV RNA detection was especially beneficial to early diagnosis during viramia period and was helpful for the evaluation of anti-HCV therapy.
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