2501
|
Lu Y. [Clinical observation on the termination of paroxysmal supraventricular tachycardia by tetrandrine]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 1990; 18:164-5. [PMID: 2086171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
2502
|
Loh PC, Lu Y, Brock JA. Growth of the penaeid shrimp virus infectious hypodermal and hematopoietic necrosis virus in a fish cell line. J Virol Methods 1990; 28:273-80. [PMID: 2117021 DOI: 10.1016/0166-0934(90)90120-5] [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: 12/30/2022]
Abstract
An established fish cell line, epithelioma papillosum cyprini (EPC), originating from the carp (Cyprinus carpio) was found to be susceptible to the penaeid shrimp virus, infectious hypodermal and hematopoietic necrosis virus (IHHNV). This economically important pathogen of penaeid shrimp raised in mariculture has been previously limited to growth only in young post-larval shrimps. This is, to our knowledge, the first reported successful growth of the penaeid virus in a fish cell line; it promises to provide a sensitive and convenient cell culture system for the primary isolation and detection of IHHNV which will aid immensely the production of IHHNV-free penaeid shrimp stocks for mariculture. Of added significance is the replication of a crustacean virus in a fish cell line which has never before been reported. The use of this sensitive cell line will also greatly facilitate the characterization of the IHHN virus and other crustacean viruses.
Collapse
|
2503
|
Han J, Jiao L, Lu Y, Sun Z, Gu QM, Scanlon KJ. Evaluation of N-4-(hydroxycarbophenyl) retinamide as a cancer prevention agent and as a cancer chemotherapeutic agent. In Vivo 1990; 4:153-60. [PMID: 2133256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this review, a retinoid analogue (N-4-hydroxycarbophenyl) retinamide (R11) has been evaluated for its pharmacological and clinical properties. R11 has been studied both as a cancer prevention agent, as well as, a cancer chemotherapeutic agent. R11 alone and in combination with other agents can be used for the treatment of cervical dysplasia or leukemia. This review will examine novel strategies and mechanisms of action for retinoids in the treatment and prevention of cancer.
Collapse
|
2504
|
Lu Y, Chen Y. [Characteristics of the 1H-NMR and 13C-NMR spectra of bisbenzylisoquinoline alkaloids]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:131-7, 189. [PMID: 2085396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
2505
|
Kashani-Sabet M, Lu Y, Leong L, Haedicke K, Scanlon KJ. Differential oncogene amplification in tumor cells from a patient treated with cisplatin and 5-fluorouracil. Eur J Cancer 1990; 26:383-90. [PMID: 2141497 DOI: 10.1016/0277-5379(90)90238-o] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Peritoneal cells were derived from a patient (PK) with adenocarcinoma of the colon during the course of cisplatin/5-fluorouracil (5-FUra) treatment. Resistance to cisplatin and 5-FUra, characterized by a lack of response to chemotherapy and continued growth of the tumor, was concomitantly associated with a 2-4-fold increase in DNA copy number for dTMP synthase and dihydrofolate reductase. There was a corresponding amplification in DNA copy number of the c-myc (2X), H-ras (4X), and c-fos (15X) oncogenes. Cytogenetic studies revealed an iso (13q) chromosome, but failed to show any double minutes or homogeneously staining regions. In addition, drug-resistant tumor cells from PK and another patient (HG) displayed enhanced expression of dTMP synthase, c-fos and DNA polymerase beta when compared to normal colon tissue and the HCT8 human colon carcinoma cell line. These results suggest that elevated oncogene DNA and gene expression may be involved in the development of cisplatin resistance.
Collapse
|
2506
|
Adrian GS, Fischbach K, Lu Y, Gayet O, Rivera E, Bowman BH. Expression of chimeric human transferrin genes in transfected human tumor cell lines. SAAS BULLETIN, BIOCHEMISTRY AND BIOTECHNOLOGY 1990; 3:97-101. [PMID: 1366420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
The iron-binding plasma protein transferrin (TF) is essential for supplying iron to cells and the prevention of iron toxicity. Our laboratory has cloned and characterized the human TF gene. Comparison of promoter regions of TF genes from human, chicken, and mouse reveals a strong nucleotide sequence conservation. This study demonstrates that 5' flanking regions of the TF gene are sufficient for directing expression of a heterologous gene in transgenic mice and transfected cells. For cell-specific expression, more than 150 base pairs appear to be required.
Collapse
|
2507
|
Lu Y, Loh PC, Brock JA. Isolation, purification and characterization of infectious hypodermal and hematopoietic necrosis virus (IHHNV) from penaeidshrimp. J Virol Methods 1989; 26:339-43. [PMID: 2621242 DOI: 10.1016/0166-0934(89)90116-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A protocol was developed for the isolation and purification of the infectious hypodermal and hematopoietic necrosis virus (IHHNV) of penaeid shrimps. Cesium chloride-banded virus obtained from three sources of infected shrimps was found to have a buoyant density of 1.33 g/cm3. Also, electron microscopical studies employing negative stain revealed isometric particles having a size of 19 +/- 1 nm. Colorimetric analysis of its nucleic acid type indicated that these particles contain only RNA.
Collapse
|
2508
|
Lu Y. [CT investigation of renal cystic masses]. ZHONGHUA FANG SHE XUE ZA ZHI CHINESE JOURNAL OF RADIOLOGY 1989; 23:276-9. [PMID: 2627812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This report presented 61 cases of renal cystic masses including renal parenchymal cyst 57 cases; parapelvic cyst 2; cystic hypernephroma 1 and calyceal diverticulum 1 case. All were confirmed by CT guided puncture and aspiration. The CT features of various renal cysts. complications and some special manifestations as well as differential diagnosis were discussed. Pertinent analysis of the CT features are necessary for correct diagnosis and proper management.
Collapse
|
2509
|
Lu Y, Stenzel M, Sodroski JG, Haseltine WA. Effects of long terminal repeat mutations on human immunodeficiency virus type 1 replication. J Virol 1989; 63:4115-9. [PMID: 2760991 PMCID: PMC251019 DOI: 10.1128/jvi.63.9.4115-4119.1989] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The effects of deletions within three functional regions of the long terminal repeat of human immunodeficiency virus type 1 upon the ability of the long terminal repeat to direct production of the chloramphenicol acetyltransferase gene product and upon the ability of viruses that carry the mutations to replicate in human cell lines was investigated. The results show that the enhancer and TATAA sequences were required for efficient virus replication. Deletion of the negative regulatory element (NRE) yielded a virus that replicated more rapidly than did an otherwise isogeneic NRE-positive virus. The suppressive effect of the NRE did not depend upon the negative regulatory gene (nef), as both NRE-positive and NRE-negative viruses were defective for nef. We conclude that factors specified by the cell interact with the NRE sequences to retard human immunodeficiency virus type 1 replication.
Collapse
|
2510
|
Lu Y. [The family planning law should be issued as soon as possible]. REN KOU YAN JIU = RENKOU YANJIU 1989:58-9. [PMID: 12159316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
|
2511
|
Zhang XZ, Lu Y, Li DW, Zhao M. Idiopathic familial cerebrovascular ferrocalcinosis. Chin Med J (Engl) 1989; 102:453-6. [PMID: 2512068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
|
2512
|
Shi YM, Shen YJ, Fu MD, Lu Y. The therapeutic efficacy of the choleretic mixture against the infantile hepatitis syndrome. J TRADIT CHIN MED 1989; 9:103-5. [PMID: 2779269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Observation was made on a control study of the therapeutic efficacy of the choleretic mixture in treating 35 cases of infantile hepatitis syndrome in comparison with that of the choleretic decoction. The ages, duration of the disease, severity of icterus and serum bilirubin level in both groups were comparable. The results showed that there was no significant difference in therapeutic efficacy between the two groups, however, the resolving time of skin icterus was faster in the choleretic mixture group than in the choleretic decoction group. The choleretic mixture was convenient, easy to store, and acceptable to infants for its small dosage, and no side effects, therefore, a desirable drug against infantile hepatitis syndrome.
Collapse
|
2513
|
Farneth WE, McLean RS, McCarron EM, Zuo F, Lu Y, Patton BR, Epstein AJ. Magnetic susceptibility of YBa2Cu3O6+x: Effects of spin frustration and correlation. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:6594-6599. [PMID: 9947299 DOI: 10.1103/physrevb.39.6594] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
2514
|
Ding YC, Sun GC, Lu Y, Ly SY. The vascular microanatomy of skin territory of posterior forearm and its clinical application. Ann Plast Surg 1989; 22:126-34. [PMID: 2735707 DOI: 10.1097/00000637-198902000-00007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We have undertaken a microanatomical study of a new donor site--the posterior forearm territory--on 43 cadaver arms. Two axial arteries were found, and both the fasciocutaneous flap and the fascial flap could be elevated with the two arteries on the posterior forearm. The posterior forearm flap was transferred to the hand to repair deformities of the wrist, the first web space, the dorsal hand, and the metacarpophalangeal joints in eight cases. The result was very satisfactory. The posterior forearm flap is near the hand, easy to perform, and reliable. It is a one-stage operation and does not sacrifice a main artery. In this article we demonstrate our own ideas about flap extension, which is valuable for clinical application.
Collapse
|
2515
|
Lu Y, Yan YF, Duan HM, Lu L, Li L. Hall coefficient of single-crystal Bi2Sr2CaCu2Oy. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:729-731. [PMID: 9947213 DOI: 10.1103/physrevb.39.729] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
2516
|
Kashani-Sabet M, Rossi JJ, Lu Y, Ma JX, Chen J, Miyachi H, Scanlon KJ. Detection of drug resistance in human tumors by in vitro enzymatic amplification. Cancer Res 1988; 48:5775-8. [PMID: 3167836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Both acquired and natural resistance to chemotherapy agents have proved problematic in the treatment of neoplasia. Thymidylate synthase, which catalyzes the synthesis of thymidine precursors, has been shown to be amplified in response to a variety of chemotherapeutic agents. The detection of such amplification could prove beneficial in the development of alternative clinical protocols. In this study we report the use of existing enzymatic amplification methods in order to detect incipient amplification of the thymidylate synthase gene upon resistance to cisplatin. The assay utilizes a modification of the polymerase chain reaction in which a sequence of the thymidylate synthase gene is amplified including two flanking oligonucleotides acting as primers for DNA synthesis. This method exhibits greater sensitivity than conventional nucleic acid detection methods and requires less than 100 ng of total RNA from patient tumors and no in vitro culturing of patient cells.
Collapse
|
2517
|
Lu Y. [Clinical effects of sublingual captopril in the treatment of hypertensive emergencies]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 1988; 16:268-9, 317. [PMID: 3069418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
2518
|
Lu Y. [The diagnostic value of CT in primary carcinoma of the duodenum (report of 5 cases)]. ZHONGHUA FANG SHE XUE ZA ZHI CHINESE JOURNAL OF RADIOLOGY 1988; 22:283-5. [PMID: 2851421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
2519
|
Lu YP, Wang CL, Huang YT, Lu Y, Li MC. Treatment of congenital clubfoot by early operation. Orthopedics 1988; 11:1093-101. [PMID: 3405909 DOI: 10.3928/0147-7447-19880701-14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
2520
|
Li CJ, Zhan CL, Tang MY, Lu Y, Li GR, Peng XD, Li HY, Wu ZS, Zeng XM. [Optical and ultrastructural changes in the rabbit lens caused by microwaves]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1988; 19:200-3. [PMID: 3198105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
2521
|
Lu Y, Han J, Scanlon KJ. Biochemical and molecular properties of cisplatin-resistant A2780 cells grown in folinic acid. J Biol Chem 1988; 263:4891-4. [PMID: 3258308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
In this study, A2780 human ovarian carcinoma cells were grown in folinic acid in contrast to folic acid, and the molecular and biochemical properties of cisplatin-resistant A2780 cells were analyzed for changes in the dTMP synthase cycle. At concentrations of folinic acid that were optimal for cell growth (10(-8) M), the ED50 for cisplatin was 2.5 and 43 microM in the A2780S and A2780DDP cells, respectively. Resistance to cisplatin was associated with a 2-fold cross-resistance to 5-fluorodeoxyuridine and 5-fluorouracil as well as a 3-fold increase in both dTMP synthase activity and mRNA. The ED50 for methotrexate was similar in both A2780S and A2780DDP cells (1.2 microM). When both the A2780S and A2780DDP cells were grown in folinic acid, there was no significant difference in the level of dihydrofolate reductase activity. This data would suggest that cisplatin resistance is associated with changes in folate metabolism.
Collapse
|
2522
|
Newman EM, Lu Y, Kashani-Sabet M, Kesavan V, Scanlon KJ. Mechanisms of cross-resistance to methotrexate and 5-fluorouracil in an A2780 human ovarian carcinoma cell subline resistant to cisplatin. Biochem Pharmacol 1988; 37:443-7. [PMID: 3337743 DOI: 10.1016/0006-2952(88)90212-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Some properties of the human ovarian carcinoma line A2780 and a subline three times more resistant than the parent line to cisplatin are compared in this report. The rates of uptake and release of cisplatin were similar in the two cell lines. Resistance to cisplatin was associated with: (a) cross-resistance to 5-fluorouracil and methotrexate; (b) a 2.5-fold increase in thymidylate synthase, as measured by both enzyme activity and the capacity to complex 5-fluorodeoxyuridylate; and (c) an increase in the intracellular pools of 5,10-methylenetetrahydrofolate and tetrahydrofolate. These data suggest that cross-resistance to 5-fluorouracil and methotrexate in A2780 cells may be a consequence of increases in their respective target enzymes.
Collapse
|
2523
|
Scanlon KJ, Lu Y, Kashani-Sabet M, Ma J, Newman E. Mechanisms for cisplatin-FUra synergism and cisplatin resistance in human ovarian carcinoma cells both in vitro and in vivo. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1988; 244:127-35. [PMID: 3247881 DOI: 10.1007/978-1-4684-5607-3_12] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Cisplatin and FUra act synergisticly in human carcinomas. An increase in the availability of reduced folates necessary for tight binding of FdUMP to thymidylate synthase (TS) contributes to the enhanced cytotoxicity of this drug combination. The human ovarian A2780 cell line made three-fold resistant to cisplatin has been shown to have a three-fold elevation of m-RNA for dihydrofolate reductase (DHFR) and TS. However, this increase did not result from an amplification of the genes for these two enzymes. In contrast, ovarian carcinoma cells from patients who failed treatment with cisplatin and FUra have been shown to have both enhanced gene expression and increased gene copy number for DHFR and TS.
Collapse
|
2524
|
Lu YU, Ge J, Huang YT, Chu SC, Wang Z, Lu Y, Shi SM, Hu YY, Shi KC, Wang G. Successful replantation in ten-digit complete amputations. J Reconstr Microsurg 1988; 4:123-9. [PMID: 3361471 DOI: 10.1055/s-2007-1006910] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The authors report a case of successful replantation of all fingers in a ten-finger complete amputation. Among the factors responsible for the successful outcome were an adequate number of microsurgically-trained resident surgeons and staff, good organization and supervision by senior staff, emphasis on precision and perseverance in the operative procedures, and postoperative management. Follow-up is 15 months, and the patient now has a pair of functionally and cosmetically good hands.
Collapse
|
2525
|
Zuo F, Patton BR, Cox DL, Lee SI, Song Y, Golben JP, Chen XD, Lee SY, Cao Y, Lu Y, Gaines JR, Garland JC, Epstein AJ. Influence of magnetic rare-earth ion substitution on the magnetic susceptibility of high-Tc superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:3603-3607. [PMID: 9943290 DOI: 10.1103/physrevb.36.3603] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|