2501
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Lee SH, McGrath FP, Zhou J, Burhenne HJ. The value of sonography in the assessment of cholecystolithotripsy. THE JOURNAL OF LITHOTRIPSY & STONE DISEASE 1991; 3:319-23. [PMID: 10149171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
To assess the reliability of ultrasound in measuring a minimum stone fragment burden we implanted radiolucent human gallstone fragments measuring from less than 1 mm up to 4 mm in size into the gallbladders of 12 domestic piglets. Forty-eight hours later the fragments in each animal were assessed by a qualified radiologist using two different ultrasound machines in a randomized blinded fashion. With regard to size estimation using a 5 MHz sector scanner, in two out of 12 examinations there was an overestimation of fragment size such that in a clinical setting an unneccessary repeat lithotripsy session would have been requested. A 5 MHz linear array transducer was of sufficient reliability in all size estimations not to have resulted in such a request. No gallbladder was falsely declared fragment free. There were nonshadowing fragments present in five of 12 examinations using both transducers. Clumping of small fragments less than or equal to 3 mm was present in two examinations. We recommend that a second ultrasound examination is performed when the presence of clumping is suspected and also when a fragment-free gallbladder is initially diagnosed.
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2502
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Li Z, Ren H, Zhang Z, Sun C, Xu L, Yu H, Li L, Zhou J, Yan H, Liu H. Treatment of small cell lung cancer. CHINESE MEDICAL SCIENCES JOURNAL = CHUNG-KUO I HSUEH K'O HSUEH TSA CHIH 1991; 6:160-2. [PMID: 1665363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
During a 28-year period, 110 patients with small cell lung cancer were treated at our hospital. Fifty-nine patients received surgery, and 58 patients (including 7 cases after exploratory thoracotomy) received chemotherapy and/or radiotherapy. The 5-year survival rate of the surgically treated group was 17%, while none in the non-surgical group survived for more than 5 years.
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2503
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Coffey TJ, Dowson CG, Daniels M, Zhou J, Martin C, Spratt BG, Musser JM. Horizontal transfer of multiple penicillin-binding protein genes, and capsular biosynthetic genes, in natural populations of Streptococcus pneumoniae. Mol Microbiol 1991; 5:2255-60. [PMID: 1766389 DOI: 10.1111/j.1365-2958.1991.tb02155.x] [Citation(s) in RCA: 242] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Multiply antibiotic-resistant serotype 23F isolates of Streptococcus pneumoniae are prevalent in Spain and have also been recovered recently in the United Kingdom and the United States. Analysis of populations of these isolates by multilocus enzyme electrophoresis, and restriction endonuclease cleavage electrophoretic profiling of penicillin-binding protein (PBP) genes, has demonstrated that these isolates are a single clone (Muñoz et al., 1991). Here we report studies of non-serotype 23F penicillin-resistant pneumococci isolated in Spain and the United Kingdom. One of the isolates expressed serotype 19 capsule but was otherwise indistinguishable from the serotype 23F clone on the basis of multilocus enzyme electrophoresis, antibiotic resistance profiling, and restriction endonuclease patterns of genes encoding PBP1A, PBP2B and PBP2X, a result which suggests that horizontal transfer of capsular biosynthesis genes had occurred. These same techniques revealed that six other resistant isolates, all expressing serotype 9 polysaccharide capsule, represent a clone. Interestingly, the chromosomal lineage of this clone is not closely related to the 23F clone; however, the serotype 9 and 23F clones harbour apparently identical PBP1A, -2B and -2X genes. To explain these data, we favour the interpretation that horizontal gene transfer in natural populations has distributed genes encoding altered forms of PBP1A, -2B and -2X to distinct evolutionary lineages of S. pneumoniae.
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2504
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Wang Y, Zhou J. [The position of the patient and intravenous infusion during cesarean section]. ZHONGHUA HU LI ZA ZHI = CHINESE JOURNAL OF NURSING 1991; 26:386-7. [PMID: 1959149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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2505
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Zhou J. [Progress of Litsea cubeba emulsion in the pharmacological and therapeutic research]. ZHONG XI YI JIE HE ZA ZHI = CHINESE JOURNAL OF MODERN DEVELOPMENTS IN TRADITIONAL MEDICINE 1991; 11:509-12. [PMID: 1954669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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2506
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Bian CF, Zhou J, Hong XM, Yin XX. Effects of anticholinergic drugs on rabbit efferent phrenic discharges. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1991; 12:294-7. [PMID: 1807074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In conscious, vagotomized, curarized, and artificially-ventilated rabbits, the efferent phrenic discharges were recorded. When scopolamine, atropine, pirenzepine or AF-DX 116 (11-2[[2-[(diethylamino)methyl]-1-piperidinyl]acetyl]-5,11-dihydro- 6H[2,3-6] [1,4]benzodiazepine-6-one) was injected into the cerebello-medullary cistern, the frequency and voltage of phrenic discharges were decreased (P less than 0.05) by scopolamine (0.5 mg.kg-1) and pirenzepine (0.5 mg.kg-1), but were increased (P less than 0.01) by atropine (0.05 mg.kg-1) and AF-DX 116 (0.1 mg.kg-1). It is probable that scopolamine inhibits the respiratory center by blocking the M1 cholinergic receptors while atropine excites the respiratory center blocking the M2 cholinergic receptors.
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2507
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Liu Z, Zhou J, Zhao L. Anterior tarsal tunnel syndrome. THE JOURNAL OF BONE AND JOINT SURGERY. BRITISH VOLUME 1991; 73:470-3. [PMID: 1670452 DOI: 10.1302/0301-620x.73b3.1670452] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We have reviewed 10 patients treated for anterior tarsal tunnel syndrome produced by compression of the deep peroneal nerve or its branches, and we have studied the anatomy of the tunnel in 25 adult feet. The causes of onset of the syndrome included contusion of the dorsum of the foot, tight shoe laces, talonavicular osteophytosis, ganglion, and pes cavus. The clinical signs were often diagnostic but electromyography was helpful. Operative decompression in nine feet of eight patients gave successful results at 1.5 to 4 years follow-up.
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2508
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Zhou J. Liquid chromatography amperometric detection of carboxylic acids and phenolic acids with a copper-based chemically-modified electrode. Talanta 1991; 38:547-55. [DOI: 10.1016/0039-9140(91)80179-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/1990] [Accepted: 11/20/1990] [Indexed: 11/28/2022]
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2509
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Showalter AM, Zhou J, Rumeau D, Worst SG, Varner JE. Tomato extensin and extensin-like cDNAs: structure and expression in response to wounding. PLANT MOLECULAR BIOLOGY 1991; 16:547-65. [PMID: 1714316 DOI: 10.1007/bf00023421] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Two tomato cDNA libraries were synthesized from poly(A)+ RNAs isolated from unwounded and wounded tomato stems. These cDNA libraries were packaged in lambda gt10 and screened by in situ plaque hybridization with a tomato extensin gene clone (pTom 5.10). Several cDNA clones were identified and isolated from both libraries in this manner and subjected to restriction enzyme digestion. Southern gel blot hybridization, RNA gel blot hybridization, and DNA sequence analyses. From these analyses, the various cDNA clones were found to fall into one of five distinct classes (classes I-V). Class I clones hybridized to a 4.0 kb mRNA which accumulated markedly after wounding and encoded an extensin characterized largely by Ser-(Pro)4-Ser-Pro-Ser-(Pro)4-(Tyr)3-Lys repeats. Class II clones hybridized to a 2.6 kb mRNA which showed no accumulation following wounding and encoded an extensin containing Ser-(Pro)4-Ser-Pro-Ser-(Pro)4-Thr-(Tyr)1-3-Ser repeats. Class III clones hybridized to a 0.6 kb mRNA which greatly accumulated in response to wounding and encoded a glycine-rich protein (GRP) with (Gly)2-6-Tyr-Pro and (Gly)2-6-Arg repeats. Class IV clones contained both class I and class III DNA sequences and consequently hybridized to both the 4.0 kb and the 0.6 kb wound-accumulating mRNAs; these clones encoded a portion of a GRP sequence on one DNA strand and encoded a portion of an extensin sequence on the other DNA strand. Class V clones hybridized to a 2.3 kb mRNA which decreased following wounding and encoded a GRP sequence characterized by (Gly)2-5-Arg repeats.
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2510
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Abstract
Glycosides are the bioactive components of many famous Chinese medicines. Here reported are some bioactive glycosides we discovered from Chinese medicines in recent years. (1) Phenolic glycosides from Chinese medicines: Gastrodia elata, Aconitum austroyunanense and Helicia erratica, three bioactive phenolic glycosides were discovered and two of them have been developed into new drugs. (2) Terpenoidal glycosides: a) Monoterpenoid: the sweroside from Swertia moleensis has been developed into an anti-hepatitis drug; b) Diterpenoid: Phlomis betonicoides contains sweet glycosides; c) Triterpenoid: many biologically active triterpenoid glycosides were isolated from Panax plants and Siraitia grosvenorii. (3) Steroidal glycosides: a) C21-steroid: Cynanchum otophyllum and C. atratrum contain anti-epilepsy and anti-tumor glycosides; b) C27-steroid Hemostatic saponins were found in Paris polyphylla.
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2511
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Zhou J, Hostikka SL, Chow LT, Tryggvason K. Characterization of the 3' half of the human type IV collagen alpha 5 gene that is affected in the Alport syndrome. Genomics 1991; 9:1-9. [PMID: 2004755 DOI: 10.1016/0888-7543(91)90214-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We have determined the exon-intron structure of the 3' half of the gene for the human type IV collagen alpha 5 chain that is affected in X-chromosome-linked Alport syndrome. Six overlapping lambda phage genomic clones containing exons 1-14 (as counted from the 3' end) and two additional overlapping genomic clones containing exons 16-19 spanned a total of 60 kb, 9.5 kb of which were the 3' flanking region. The exon-intron structure was elucidated by restriction enzyme mapping, nucleotide sequencing, and heteroduplex analyses. The sequences of all of the 19 most 3' exons and their flanking sequences were determined from the genomic clones, with the exception of exon 15, which was sequenced after amplification from genomic DNA with the polymerase chain reaction. The results show that the genes for the alpha 5(IV) and alpha 1(IV) chains have an almost identical exon size pattern in the 3' half. In contrast, there is not a clear conservation of intron sizes between the two genes, although both genes may have a similar total size. The current results have allowed the identification of three mutations in the alpha 5(IV) gene in three kindreds with Alport syndrome, and the gene structure and sequencing data presented should facilitate the analysis of other as yet unidentified mutations in this heterogeneous genetic disease.
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2512
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Zhou J, Barker DF, Hostikka SL, Gregory MC, Atkin CL, Tryggvason K. Single base mutation in alpha 5(IV) collagen chain gene converting a conserved cysteine to serine in Alport syndrome. Genomics 1991; 9:10-8. [PMID: 1672282 DOI: 10.1016/0888-7543(91)90215-z] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We have identified a point mutation in the type IV collagen alpha 5 chain gene (COL4A5) in Alport syndrome. Variant PstI (Barker et al., 1990, Science 248, 1224-1227), and BglII restriction sites with complete linkage with the Alport phenotype have been found in the 3' end of the COL4A5 gene in the large Utah Kindred P. The approximate location of the variant sites was determined by restriction enzyme mapping, after which this region of the gene (1028 bp) was amplified with the polymerase chain reaction (PCR) from DNA of normal and affected individuals for sequencing analysis. The PCR products showed the absence or presence of the variant PstI and BglII sites in DNA from normal and affected individuals, respectively. DNA sequencing revealed a single base change in exon 3 (from the 3' end) in DNA from affected individuals, changing the TGT codon of cysteine to the TCT codon for serine. This single base mutation also generated new restriction sites for PstI and BglII. The mutation involves a cysteine residue that has remained conserved in the carboxyl-end noncollagenous domain (NC domain) of all known type IV collagen alpha chains from Drosophila to man. It is presumably crucial for maintaining the right conformation of the NC domain, which is important for both triple-helix formation and the formation of intermolecular cross-links of type IV collagen molecules.
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2513
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Carlson DM, Zhou J, Wright PS. Molecular structure and transcriptional regulation of the salivary gland proline-rich protein multigene families. PROGRESS IN NUCLEIC ACID RESEARCH AND MOLECULAR BIOLOGY 1991; 41:1-22. [PMID: 1882074 DOI: 10.1016/s0079-6603(08)60005-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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2514
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Li MF, Yu PY, Jia YB, Zhou J, Gao JL. Reply to "Comment on 'Negative-U property of the DX center in AlxGa1-xAs:Si' ". PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:9711-9712. [PMID: 9995216 DOI: 10.1103/physrevb.42.9711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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2515
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Zhou J, Sims C, Chang CH, Berti-Mattera L, Hopfer U, Douglas J. Proximal tubular epithelial cells possess a novel 42-kilodalton guanine nucleotide-binding regulatory protein. Proc Natl Acad Sci U S A 1990; 87:7532-5. [PMID: 2120702 PMCID: PMC54781 DOI: 10.1073/pnas.87.19.7532] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The proximal tubule of the kidney represents an important location where adenylate cyclase regulates salt and water transport; yet a detailed characterization of the distribution and classification of guanine nucleotide-binding protein (G protein) and adenylate cyclase is lacking. We used purified brush border (20-fold) and basolateral membranes (14-fold) to characterize parathyroid hormone- and G protein-regulated adenylate cyclase and G-protein distribution. Adenylate cyclase was predominantly localized to basolateral membranes, while the 46-kDa alpha subunit of the stimulatory G protein (Gs) was 2-fold higher in brush border membranes than in basolateral membranes. The alpha subunit of the inhibitory G protein (Gi; 41 kDa) was equally distributed on immunoblotting but was 2-fold higher in brush border membranes than in basolateral membranes on radiolabeling with pertussis toxin. A 42-kDa cholera toxin substrate that cross-reacted with antisera to the common alpha subunit of G proteins and to Gs on immunoblotting and that was not immunoprecipitated with two Gi antisera was the most abundant alpha subunit and comprised approximately 1% of the total membrane proteins. These observations suggest that G proteins are important regulators of proximal tubular transport independent of adenylate cyclase.
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2516
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Goodenough JB, Zhou J. Correlation bag and high-Tc superconductivity. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:4276-4287. [PMID: 9995954 DOI: 10.1103/physrevb.42.4276] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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2517
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Zhou J, Crawford L, McLean L, Sun XY, Stanley M, Almond N, Smith GL. Increased antibody responses to human papillomavirus type 16 L1 protein expressed by recombinant vaccinia virus lacking serine protease inhibitor genes. J Gen Virol 1990; 71 ( Pt 9):2185-90. [PMID: 2170578 DOI: 10.1099/0022-1317-71-9-2185] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The L1 gene of human papillomavirus type 16 (HPV-16) driven by the vaccinia virus major late 4b gene promoter has been inserted into three different sites of the vaccinia virus genome. Insertion into the thymidine kinase (TK) gene was achieved by selection of TK- mutants in BUdR on TK- cells. Insertion into two vaccinia virus serine protease inhibitor (serpin) genes was achieved by co-insertion of the Escherichia coli xanthine guanine phosphoribosyltransferase gene linked to the vaccinia virus 7.5K promoter and selection of mycophenolic acid-resistant recombinant viruses. Each recombinant virus expressed a 57K L1 protein at similar levels and with similar kinetics. However, immunization of mice with these recombinant viruses induced different levels of antibody to the L1 protein. Viruses lacking serpin genes B13R and B24R induced significantly higher antibody levels than did viruses lacking the TK gene. The presence of functional B13R and B24R gene products is therefore somehow immunosuppressive at least for antibody responses to the L1 protein of HPV-16.
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2518
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Zhou J. Regular fractal models of snowflakes and critical dynamics of the kinetic Ising model on fractals. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:2607-2609. [PMID: 9995727 DOI: 10.1103/physrevb.42.2607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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2519
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Li T, Zhou J, Jiang W, Li C. [Effects of processing on volatile oil constituents in nutmeg and on the contents of myristicin]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:471-3, 511. [PMID: 2093319] [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 reports a GC analysis of the volatile oil contained in the nutmeg (Semen Myristicae) prepared by simmering wrapped in flour in hot purified talc, scalding in hot purified talc and stir-frying in smoking wheat bran. The experimental results showed that before and after processing the volatile oil compounds in nutmeg are the same and during processing no known compounds disappeared. The contents of the main volatile oil compounds in nutmeg changed, however, before and after processing, including the amounts of myristicin, one of the toxic compounds in nutmeg. It is suggested that the amounts of myristicin could be decreased notably under certain processing conditions.
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2520
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Li T, Zhou J, Xu Z, Pan J, Mao S. [Effects of processing methods on the amounts of volatile oil of nutmeg and on isolation and characterization of the volatile oil constituents]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:405-7, 446. [PMID: 2261071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In this paper, the authors investigated the effects of various processing methods, i.e., scalding in hot purified talc, simmering wrapped in flour in hot purified talc and stir-frying in smoking wheat bran, on nutmeg (Semen Myristicae) in terms of the quantities of the volatile oil. The experimental results revealed that the amounts of volatile oil contained in nutmeg vary remarkably with the lengths of cooking time and the fluctuation of temperature. Detected by GC-MS-computer, 32 compounds of nutmeg were characterized, and their contents were determined by GC respectively.
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2521
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Barker DF, Hostikka SL, Zhou J, Chow LT, Oliphant AR, Gerken SC, Gregory MC, Skolnick MH, Atkin CL, Tryggvason K. Identification of mutations in the COL4A5 collagen gene in Alport syndrome. Science 1990; 248:1224-7. [PMID: 2349482 DOI: 10.1126/science.2349482] [Citation(s) in RCA: 618] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
X-linked Alport syndrome is a hereditary glomerulonephritis in which progressive loss of kidney function is often accompanied by progressive loss of hearing. Ultrastructural defects in glomerular basement membranes (GBM) of Alport syndrome patients implicate an altered structural protein as the cause of nephritis. The product of COL4A5, the alpha 5(IV) collagen chain, is a specific component of GBM within the kidney, and the gene maps to the same X chromosomal region as does Alport syndrome. Three structural aberrations were found in COL4A5, in intragenic deletion, a Pst I site variant, and an uncharacterized abnormality, which appear to cause nephritis and deafness, with allele-specific severity, in three Alport syndrome kindreds in Utah.
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2522
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Allan K, Campion A, Zhou J, Goodenough JB. X-ray photoemission spectroscopy study of LaCuO3. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:11572-11575. [PMID: 9993580 DOI: 10.1103/physrevb.41.11572] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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2523
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Zhou J, Kang SS, Wong PW, Fournier B, Rozen R. Purification and characterization of methylenetetrahydrofolate reductase from human cadaver liver. BIOCHEMICAL MEDICINE AND METABOLIC BIOLOGY 1990; 43:234-42. [PMID: 2383427 DOI: 10.1016/0885-4505(90)90029-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Methylenetetrahydrofolate reductase from human cadaver liver was purified to homogeneity. The purified enzyme had a molecular mass of 150 kDa. On SDS-polyacrylamide gel electrophoresis it was dissociated into a single fragment with a molecular mass of 39 kDa. In contrast, fresh lymphocyte enzyme extract showed a major band with a molecular mass of 75 kDa and a minor band of 39 kDa. Fresh liver enzyme was inhibited by S-adenosylmethionine while the purified enzyme from human cadaver liver was not inhibited. These observations suggest that human methylenetetrahydrofolate reductase is composed of two identical subunits of 75 kDa each but is cleaved into a major single band due to autolysis in cadaver liver. The purified cadaver enzyme was a FAD-specific protein. The pH optimum was 6.6 for methylenetetrahydrofolate-NADPH oxidoreductase, 6.5 for methyltetrahydrofolate-menadione oxidoreductase, and 7.2 for NADP-menadione oxidoreductase. The Km values of human liver methylenetetrahydrofolate reductase were 17 microns for NADPH and 38 microns for methyltetrahydrofolate in the reduction of menadione, and 12 microns for NADPH in the reduction of methylenetetrahydrofolate.
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2524
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Zhou J, Lee SH, Rawat B, Fache JS, Maciejewska U, Burhenne HJ. Iodinated contrast medium as an aid to gallstone dissolution with methyl tert-butyl ether: in vitro study. Radiology 1990; 175:479-82. [PMID: 2326473 DOI: 10.1148/radiology.175.2.2326473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Methyl tert-butyl ether (MTBE) floats on bile, whereas gallstones sink. Therefore, stones and MTBE are separated by a layer of bile. This study investigates the effect of contrast medium on flotation of gallstones in bile and its role in stone and fragment dissolution with MTBE. Fresh human gallstones, both calcified and noncalcified, from different patients were tested in vitro for flotation in bile, with and without addition of contrast medium. All gallstones or fragments sank in bile before the introduction of contrast medium. Noncalcified stones floated when the contrast medium-bile volume ratio was 1:6 or more, while double this amount of contrast medium was required to float calcified stones. Fragments did dissolve somewhat in MTBE in the presence of bile alone, but when contrast medium was added, almost complete dissolution occurred. This is thought to be due to increased contact between the fragments and MTBE, both floating on the contrast medium-bile mixture. Contrast material may be a useful adjuvant in gallstone dissolution therapy with MTBE in vivo.
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2525
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Zhou J, Zhou S. [Treatment of orthostatic dysregulation by the principle of bu-shen yi-qi]. ZHONG XI YI JIE HE ZA ZHI = CHINESE JOURNAL OF MODERN DEVELOPMENTS IN TRADITIONAL MEDICINE 1990; 10:280-2, 260. [PMID: 2397544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Sixty cases of orthostatic dysregulation was randomly divided into treatment group (TG) and control group (CG), both 30 cases. Traditional Chinese medical herbs were used for TG under the principle of Bu-Shen Yi-Qi, and routine treatments such as oryzanol, vitamin B1 and B6 were applied to CG. After a curable stage of one month, the results showed that 16 of TG and 4 of CG were cured; 8 of TG and 6 of CG improved. The cure rate and the effective rate were significantly better in TG than in CG (P less than 0.01). 43 cases (71.7%) clinically expressed mild anemia. Before and after the treatment, the values of RBC, SI, Hb, SIBC, MCH in 20 cases of TG turned significantly better (P less than 0.01), but 17 cases of CG remained unchanged under the principle. The authors purposefully selected herbs that contain rich trace elements. For example, iron is an important element of Hb and zinc is an element in proteotic nucleicacidase. The quantity of zinc in body is related to many enzyme activities. Since these herbs could increase chronotropic effect of blood vessels and cure anemia, they could be used to cure patients with orthostatic dysregulation.
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2526
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Montefiori DC, Modliszewski A, Shaff DI, Zhou J. Inhibition of human immunodeficiency virus type 1 replication and cytopathicity by synthetic soluble catecholamine melanins in vitro. Biochem Biophys Res Commun 1990; 168:200-5. [PMID: 2327999 DOI: 10.1016/0006-291x(90)91694-n] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Synthetic soluble melanins were synthesized by spontaneous oxidation of L-dopamine, norepinephrine or 5-hydroxytryptamine (serotonin) in weak alkaline solution. These three melanins inhibited infection of human CD4+ lymphoblastoid cells (MT-2) by cell-free human immunodeficiency virus type 1 (HIV-1), without cell toxicity, at concentrations of 0.15-10 micrograms/ml. Also, syncytium formation and resulting cytopathic effects when uninfected cells were mixed with chronic HIV-1-infected cells were blocked by these melanins. Antisyncytial activity was greater when infected cells were preincubated with melanin than when uninfected cells were preincubated with melanin, thus suggesting that interaction of melanin with viral proteins is an important aspect of the antiviral mechanism. These results make synthetic soluble melanins interesting candidates for further study as possible anti-HIV-1 therapeutics.
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2527
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Li M, Zhou J, Fan Y, Li W, Qin L, Yang W. [Analgesic and anti-inflammatory effects and toxicity of houjianxi]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1990; 15:235-8, 256. [PMID: 2206377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
It is effective for acute and chronic laryngopharyngitis clinically. Houjianxi can raise the pain thresholds during hot-plate test in mice, tail flick test in rats, and writhing test in mice with single dose ig 0.125 to 2.0 g/kg. Houjianxi can also inhibit the swelling of hind paw induced by sc 1% carrageenin 0.1 ml in rats as well as the increased vascular permeability induced by ip 0.7% HAC in mice. Toxic side effects were not observed for Houjianxi ig 48 g/kg x 3 within a day in mice and 1.8 g/kg daily for 90 d in rats.
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2528
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Chang F, Shen Q, Zhou J, Wang C, Wang D, Syrjänen S, Syrjänen K. Detection of human papillomavirus DNA in cytologic specimens derived from esophageal precancer lesions and cancer. Scand J Gastroenterol 1990; 25:383-8. [PMID: 2159655 DOI: 10.3109/00365529009095503] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A series of 80 esophageal cytologic specimens derived from the same number of patients with previously diagnosed squamous cell dysplasia of the esophagus were examined for the presence of human papillomavirus (HPV) infection by filter in situ hybridization (FISH), using a mixed DNA probe containing HPV types 11, 16, and 18. All the patients came from an area at high risk for esophageal cancer in China. A total of 53 cases (66.3%) were demonstrated as HPV-DNA-positive. HPV DNA was detected in 22.2% (2 of 9) of the patients without cytologic atypia, in 50% (3 of 6) with mild dysplasia, in 80.6% (25 of 31) with moderate dysplasia, in 67.9% (19 of 28) with severe dysplasia, and in 66.7% (4 of 6) with an invasive squamous cell carcinoma. The present results confirm the recent findings on HPV involvement in esophageal squamous cell lesions. They support the hypothesis that HPV is a possible etiologic agent in esophageal carcinogenesis, most probably acting synergistically with physical, chemical, and/or nutritional factors that have previously been related with this malignancy in the high-risk areas of China.
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2529
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Furst JE, Golden DE, Mahgerefteh M, Zhou J, Mueller D. Absolute low-energy e--Ar scattering cross sections. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 40:5592-5600. [PMID: 9901941 DOI: 10.1103/physreva.40.5592] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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2530
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Zhou J. [Experimental study of transplantation of the dermis for reconstruction oral mucosal defects]. ZHONGHUA KOU QIANG YI XUE ZA ZHI = ZHONGHUA KOUQIANG YIXUE ZAZHI = CHINESE JOURNAL OF STOMATOLOGY 1989; 24:374-6. [PMID: 2517834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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2531
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Li MF, Jia YB, Yu PY, Zhou J, Gao JL. Negative-U property of the DX center in AlxGa1-xAs:Si. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:1430-1433. [PMID: 9991994 DOI: 10.1103/physrevb.40.1430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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2532
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Zhou J, Qiu CL. [Renal angiotensin II receptors and their alteration in renal diseases]. SHENG LI KE XUE JIN ZHAN [PROGRESS IN PHYSIOLOGY] 1989; 20:202-5. [PMID: 2692158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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2533
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Zhou J, Sinha S, Goodenough JB. Comment on "Identification of a superoxide in superconducting La2CuO4+ delta by x-ray photoelectron spectroscopy". PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:12331-12333. [PMID: 9948083 DOI: 10.1103/physrevb.39.12331] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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2534
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Zhou J, Yang ZR. Critical dynamics of the kinetic Ising model on regular fractals. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:9423-9431. [PMID: 9947677 DOI: 10.1103/physrevb.39.9423] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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2535
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Hunag YL, Zhou J. [Nursing care in angioma cutis treated with 90Sr in children]. ZHONGHUA HU LI ZA ZHI = CHINESE JOURNAL OF NURSING 1989; 24:271-2. [PMID: 2791139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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2536
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He SQ, Li CF, Zhen XY, Zhou J, Liu TF. Radiation survival properties of cultured human gastric adenocarcinoma cells and the effect of AT-1727. Int J Radiat Oncol Biol Phys 1989; 16:361-8. [PMID: 2921140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Tumor cells (SGC-7901) obtained from a human gastric adenocarcinoma have been examined with regard to their intrinsic sensitivity to gamma-irradiation and as to how this intrinsic sensitivity might be altered by growth in a synthesized agent AT-1727 (N4-morpholino-methyl-3,5-dioxopiperazynyl-1,2 ethanl). Clonogenic survival was measured via colony formation assays and fitted to single-hit-multitarget formula. Exponentially growing cells exhibited the mean of survival parameters: D0 = 0.86 + 0.04 Gy; n = 7.03 + 2.3; Dq = 1.63 + 0.23 Gy and SF2 (surviving fraction of conventional daily clinical dose of 2 Gy) = 45-50%. Split-dose survival assays and delayed plating methods were used to exploit the capacity of sublethal damage repair of this cell line studied demonstrating the reappearance of initial shoulder on the survival curve and an increased survival. Alteration of radiosensitivity of SGC cells by AT-1727 was shown when cultures were incubated in a medium with the drug for a 6 hr interval between split dose irradiation, indicating the inhibition of sublethal damage repair. The radioresistance of hypoxic SGC cells was decreased when pre-treatment with AT-1727 was given 2 hr before irradiation, and the decrease of surviving fraction was drug-dose dependent. A maximum enhanced effect was obtained when 0.15 mM of AT-1727 was used, reaching an ER of 1.24. Inhibition of sublethal damage repair and action as a hypoxic radiosensitizer were considered to be two parts of the mechanism of AT-1727 in modification of radiation effects.
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2537
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Cao SL, Liu TF, Wang ZH, Zhou J, Huang KM, Yao WQ, Shen XL. DNA flow cytometric analysis of human nasopharyngeal carcinoma in nude mice. Int J Radiat Oncol Biol Phys 1989; 16:343-5. [PMID: 2921136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The tissue from a patient with nasopharyngeal carcinoma has been transferred to nude mice (BALB/c), and has successfully been growing through twenty passages. The tumors in the nude mice and primary human tumor have been examined for the cellular DNA content by FCM and also conventional pathological examination, chromosome analysis, and EBV test. The tumor take rate varied markedly in different passages with a mean value of approximately 70%, and showing a tendency to increase. The tumor doubling time within 6-12 weeks after transplantation of six tumors in 18 and 20 passages were 14.8 and 9.3 days respectively. However, the tumor volume at 12 weeks varied significantly, ranging from 438 to 1998 mm3. By FCM, it has been found that the values of DNA index were about the same in both primary tumor and the tumors in nude mice. The distribution of various phase cells in cell cycle was also about the same in both. In conclusion, the application of FCM to examine the cellular DNA content of the tumor in nude mice is a rapid and sensitive method, useful in the investigation on the stability of biological characteristics of human NPC in nude mice and in further studies on the effects by various therapeutic methods.
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2538
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Wang L, Yao XC, Zhou J, Qin GG. Energy levels and symmetries of palladium centers in silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:13494-13497. [PMID: 9946348 DOI: 10.1103/physrevb.38.13494] [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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2539
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Gu ZM, Lin G, Yi JR, Li JM, Zhou J, Pan WM. Transluminal Catheter angioplasty of abdominal aorta in Takayasu's arteritis. Acta Radiol 1988. [DOI: 10.3109/02841858809171926] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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2540
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Kang SS, Zhou J, Wong PW, Kowalisyn J, Strokosch G. Intermediate homocysteinemia: a thermolabile variant of methylenetetrahydrofolate reductase. Am J Hum Genet 1988; 43:414-21. [PMID: 3177384 PMCID: PMC1715503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A "newly detected" variant of methylenetetrahydrofolate (MTHF) reductase (E.C.1.1.1.68) deficiency associated with an 8-15-fold increase in plasma total homocysteine was discovered in two unrelated patients who had subnormal serum folate. However, the homocysteinemia was corrected by oral folic acid supplement. When MTHF reductase activities in lymphocyte extracts before and after heat treatment at 46 C for 5 min were compared, there was a consistent difference in heat stability between the enzyme from the controls and that from the patients. The mean residual activities after heat treatment were 37.0% (34.1%-42.6%) in the controls and 15.2% and 15.1% in the two patients, respectively. Two obligate heterozygotes for severe MTHF reductase deficiency had residual activities of 39.6% and 37.7%. A similar difference in thermostability was demonstrated in cultured skin fibroblasts and lymphoblasts. Studies with a mixture of lymphoblast extracts from a control and a patient and with partially purified enzyme suggested that the thermostability was an independent characteristic of MTHF reductase. These observations provided evidence of a hitherto undescribed mutant MTHF reductase in our two patients with intermediate homocysteinemia. Unlike previously reported patients with MTHF reductase deficiency, there was no apparent clinical problem related to the abnormal folate or homocysteine metabolism during infancy or childhood in these two subjects, but one of them had vascular disorders in adulthood. The observations in these two subjects suggested that a moderate deficiency of MTHF reductase might be associated with vascular disorders in adult life.
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2541
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Gu ZM, Lin G, Yi JR, Li JM, Zhou J, Pan WM. Transluminal catheter angioplasty of abdominal aorta in Takayasu's arteritis. Acta Radiol 1988; 29:509-13. [PMID: 2901848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Nine patients with Takayasu's arteritis and a long stenotic segment of the abdominal aorta were treated by percutaneous transluminal angioplasty (PTA). Intermittent claudication disappeared in six of seven cases, the femoral pulse reappeared in all five; ankle/arm indices increased in seven cases; elevated blood pressure normalized in seven of eight cases. Seven patients were followed for 3 to 28 months. They were all free of symptoms from the lower extremities. In three patients with or without renal artery stenosis and with hypertension, the blood pressure decreased after PTA of the abdominal aorta only. PTA may be a valuable treatment in Takayasu's arteritis and stenosis of the abdominal aorta.
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2542
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Zhao GM, Zhou J, Chi ZQ. [Effects of potent analgesic 3-(beta-phenylethyl)-9 beta-methoxy-9 alpha-(m-hydroxyphenyl)-3-azabicyclo [3,3,1]-nonane (p-5721) on electroencephalography in rabbits]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1988; 9:300-3. [PMID: 3195338] [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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2543
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Zhou J, Zheng WJ, Chi ZQ. [Effect of ohmefentanyl injection to the region of nucleus tractus solitarius on discharge of phrenic nerve in rabbits]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1988; 9:296-9. [PMID: 3195337] [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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2544
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Zhou J, Hall FF. Infrared lidar measurements of crustal aerosol mixing in the troposphere. APPLIED OPTICS 1988; 27:2639-2640. [PMID: 20531808 DOI: 10.1364/ao.27.002639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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2545
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Sumida T, Sugimoto H, Fuwa T, Yamasaki K, Takeda O, Kohda H, Nakata Y, Segawa T, Zhou J. [Studies on active constituents in medicinal plants using the receptor binding assay. II. Dopamine 2 receptor]. YAKUGAKU ZASSHI 1988; 108:450-3. [PMID: 2975333 DOI: 10.1248/yakushi1947.108.5_450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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2546
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Zhou J, Zhao GM, Jin WQ, Zheng WJ, Chi ZQ. [Analgesic effects and non-dependence of ipalbidine]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1988; 9:107-11. [PMID: 2847487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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2547
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Zhou J, Sun JM, Zhang PH. [Experimental study on a prefabricated peritoneal tube for venous reconstruction]. ZHONGHUA WAI KE ZA ZHI [CHINESE JOURNAL OF SURGERY] 1988; 26:65-7, 124. [PMID: 3191808] [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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2548
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Gu ZM, Lin G, Yi JR, Li JM, Zhou J, Pan WM. Transluminal Catheter angioplasty of abdominal aorta in Takayasu's arteritis. Acta Radiol 1988. [DOI: 10.1080/02841858809171926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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2549
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Zhou J. [[The size, type, and structure of rural families in the course of modernization in China]]. REN KOU YAN JIU = RENKOU YANJIU 1988:17-20. [PMID: 12282401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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2550
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Zhuang F, Ynag B, Zhou J, Yang H. Unsteady combustion and vaporization of a spherical fuel droplet group. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/s0082-0784(88)80296-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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