301
|
Abstract
Myocardial ischaemia and reperfusion injury in 16 anaesthetized Sprague-Dawley rats, eight of which were pretreated with morphine (5 mg/kg, intraperitoneally) to prevent arrhythmias, were studied immunocytochemically with anti-muscle actin specific monoclonal antibody (HHF35). Eight cases of simple ischaemia and eight cases of sham-operated rats were used as controls. With HHF35 ABC immunocytochemical method, the left ventricular myocardium in the reperfusion group (without morphine) showed large areas of staining loss, but no loss of staining was seen in controls. No significant changes were seen with H&E stain in all hearts. Compared with HBFP, acridine orange (AO), eosin-fluorescence, HHF35 ABC staining best demonstrated myocardial reperfusion injury. The results indicate that the degree of myocardial damage may be related to the arrhythmias.
Collapse
Affiliation(s)
- C Fu
- Department of Forensic Pathology, Sun Yat-sen University of Medical Sciences, Guangzhou, P.R. China
| | | | | |
Collapse
|
302
|
Fu C, Maier RJ. A genetic region downstream of the hydrogenase structural genes of Bradyrhizobium japonicum that is required for hydrogenase processing. J Bacteriol 1993; 175:295-8. [PMID: 8416905 PMCID: PMC196126 DOI: 10.1128/jb.175.1.295-298.1993] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Deletion of a 2.9-kb chromosomal EcoRI fragment of DNA located 2.2 kb downstream from the end of the hydrogenase structural genes resulted in the complete loss of hydrogenase activity. The normal 65- and 35-kDa hydrogenase subunits were absent in the deletion mutants. Instead, two peptides of 66.5 and 41 kDa were identified in the mutants by use of anti-hydrogenase subunit-specific antibody. A hydrogenase structural gene mutant did not synthesize either the normal hydrogenase subunits or the larger peptides. Hydrogenase activity in the deletion mutants was complemented to near wild-type levels by plasmid pCF1, containing a 6.5-kb BglII fragment, and the 65- and 35-kDa hydrogenase subunits were also recovered in the mutants containing pCF1.
Collapse
Affiliation(s)
- C Fu
- Department of Biology, Johns Hopkins University, Baltimore, Maryland 21218
| | | |
Collapse
|
303
|
Abstract
It has previously been shown that either phenylalanine codon, UUU or UUC, could be misread as leucine during phenylalanine starvation, if the codons encoded residue 8 of the Escherichia coli argI gene product, ornithine transcarbamylase (OTC). However, no leucine misincorporation was detected when either of these same codons encoded residue 3. Here we report that leucine misincorporation can be directed by a UUU codon for residue 3 of OTC during phenylalanine starvation, if the argI gene has been mutated so that the codon preceding the UUU has been changed from the rarely used glycine codon GGG to the more commonly used GGC.
Collapse
Affiliation(s)
- J Parker
- Department of Microbiology, Southern Illinois University, Carbondale, IL 62901
| | | | | |
Collapse
|
304
|
Fu C, Maier RJ. Nickel-dependent reconstitution of hydrogenase apoprotein in Bradyrhizobium japonicum Hupc mutants and direct evidence for a nickel metabolism locus involved in nickel incorporation into the enzyme. Arch Microbiol 1992; 157:493-8. [PMID: 1503531 DOI: 10.1007/bf00276768] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A double mutant (JH103K10) was created from hydrogenase constitutive mutant (JH103) by replacement of a chromosomal 0.60 kb nickel metabolism related locus with a kanamycin resistance gene. The double mutant required 10 to 20 times more nickel (Ni) to achieve near parental strain levels of hydrogenase activity. In the absence of nickel, both JH103K10 and JH103 synthesized high levels of (inactive) hydrogenase apoprotein (large subunit, 65 kDa). With nickel, the double mutant JH103K10 synthesized the same level of hydrogenase apoenzyme (65-kDa subunit) as the JH103 parent strain; however, whole cell hydrogenase activity in JH103K10 was less than half of that in JH103, and the CPM (due to 63Ni in hydrogenase) of membranes and the calculated ratio of nickel per unit of hydrogenase enzyme of the double mutant were 40% of that in JH103. Therefore, the difference in hydrogenase activities between the double mutant and the Hupc strain can be accounted for by different abilities of the strains to incorporate nickel into the hydrogenase apoenzyme. The addition of nickel ions to previously Ni-starved and then chloramphenicol-treated Bradyrhizobium japonicum whole cells (JH103 and JH103K10) resulted in (an in vivo) restoration of hydrogenase activity, suggesting that the apoprotein synthesized in the Ni-free cultures could be activated by addition of nickel even in the absence of protein synthesis. The extent of reconstitution of active hydrogenase by nickel was greater in the absence of chloramphenicol. Hydrogenase apoprotein could not be activated by nickel in vitro even with the addition of ATP. The successful in vivo but not in vitro results suggest that enzymatic but cell-disruption labile factors are required for Ni incorporation into hydrogenase.
Collapse
Affiliation(s)
- C Fu
- Department of Biology, Johns Hopkins University, Baltimore, MD 21218
| | | |
Collapse
|
305
|
Abstract
The effect of helium-neon irradiation on serum lipid peroxide concentrations in mice following 6-7% body surface area burns was investigated in a controlled study. Immediately following injury by an 8-sec 100 degrees C scalding, 25 mice were irradiated by a helium-neon laser at 0.05 J/cm2. A control group of the same size underwent identical treatment but received only sham irradiation. Serum lipid peroxide concentrations increased markedly in the control group at 0.5-4 h (P less than 0.0001, two sample t-test). In the laser treated group, the lipid peroxide concentrations remained relatively constant and were significantly depressed relative to the control group 4 h following burning (P less than 0.0001, two-sample t-test).
Collapse
Affiliation(s)
- D Zhang
- Clinical Laser Laboratory, Xingqiao Hospital, Chongqing, People's Republic of China
| | | | | | | | | |
Collapse
|
306
|
Yu P, Li F, Wei X, Wu R, Fu C. Treatment of essential hypertension with auriculoacupressure. J TRADIT CHIN MED 1991; 11:17-21. [PMID: 1861504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Auriculoacupressure was used in the treatment of 291 cases of essential hypertension, in comparison with 51 similar cases treated with Fufang Jiangya (composite hypotensive) Tablets. Analysis of results showed that the therapeutic effects in the 2 groups were similar, while the rate of marked efficacy in the acupressure group was higher than that of the medication group, and the level of blood lipids also significantly dropped (P less than 0.01); there was only minor improvement in blood rheology. In addition, acupressure manifested biphasic regulatory effects on sinus arrythmia. The curative effect of acupressure on essential vascular hypertension was good.
Collapse
Affiliation(s)
- P Yu
- First Teaching Hospital, Harbin Medical University
| | | | | | | | | |
Collapse
|
307
|
Abstract
A double antibody enzyme-linked immunosorbent assay (sandwich ELISA) was used for the detection of a circulating antigen from human schistosomiasis japonica infections. This assay involves the use of polyclonal rabbit Schistosoma japonicum soluble egg antigen (SEA) antiserum to bind circulating antigen and a monoclonal antibody (MabH4) to identify and quantify this antigen. Sera from 108 S. japonicum-infected patients (acute and chronic) were tested. Sera from 93 of 95 patients with chronic infection were positive for this antigen; sera from 12 of 13 patients with acute infections were also positive. Antigen was not detectable in control human sera. Sera from 35 chronic schistosomiasis patients were collected 6-12 months after praziquantel treatment. Circulating antigen was not detectable in the sera of 33 of these patients and was dramatically reduced in 2. This ELISA system may prove valuable in differentiating past and current infections.
Collapse
Affiliation(s)
- C Fu
- Vanderbilt University, Nashville, Tennessee
| | | |
Collapse
|
308
|
Carter CE, Fu C, Colley DG. The effect of praziquantel on the circulating antigen SJ 70 in murine schistosomiasis japonica. Am J Trop Med Hyg 1990; 42:342-6. [PMID: 2109949 DOI: 10.4269/ajtmh.1990.42.342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
A circulating schistosome 70 kDa antigen (SJ 70) has been detected in the sera of mice infected with Schistosoma japonicum. For the detection of this antigen, a double antibody sandwich enzyme-linked immunosorbent assay (ELISA) was employed. SJ 70 is first detected in the serum of S. japonicum-infected mice 4 weeks after infection. Antigen levels rise rapidly, plateau by 7 weeks after infection, and remain relatively unchanged for at least another 9 weeks. In mice infected with S. japonicum for 7 weeks and then treated with praziquantel (100 mg/kg body weight), there is a significant decrease in serum antigen levels within 2 weeks after treatment, and an almost complete disappearance of antigen from the serum 3-4 weeks after treatment.
Collapse
Affiliation(s)
- C E Carter
- Vanderbilt University, Nashville, Tennessee
| | | | | |
Collapse
|
309
|
Abstract
Uptake hydrogenase activity of
Azospirillum brasilense
in vitro (cell-free extract) was very much more sensitive to O
2
than was that of
A. amazonense
, and the O
2
pressure optima for uptake hydrogenase activities were 0.01 and 0.4 to 3 kPa for
A. brasilense
and
A. amazonense
, respectively. The addition of superoxide dismutase did not increase uptake hydrogenase activity of
A. brasilense
either in vivo or in vitro. The O
2
uptake rates of
A. brasilense
and
A. amazonense
were nearly the same. Inhibition of
A. brasilense
O
2
-dependent uptake hydrogenase activity by O
2
was highly reversible under the conditions tested. O
2
also markedly inhibited in vitro methylene blue-dependent uptake hydrogenase activity of
A. brasilense
, and this inhibition was highly reversible. It is concluded that the difference in O
2
tolerance of the uptake hydrogenases is not due to a difference in respiratory protection in the two species and may be due to inherent differences in the two enzymes. For the three species,
A. brasilense
,
A. amazonense
, and
A. lipoferum
, almost all the recovered methylene blue-dependent uptake hydrogenase activity was associated with the membrane fraction.
Collapse
Affiliation(s)
- C Fu
- Department of Microbiology, Macdonald College of McGill University, 21,111 Lakeshore Road, Ste Anne de Bellevue, Quebec, Canada H9X 1C0
| | | |
Collapse
|
310
|
Chen Y, Fu C, Ho K, Harmon BN. Calculations for the transverse N-point phonons in bcc Zr, Nb, and Mo. Phys Rev B Condens Matter 1985; 31:6775-6778. [PMID: 9935560 DOI: 10.1103/physrevb.31.6775] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|
311
|
Fu C. [Observation of various immunological indices in 207 patients with schistosomiasis]. Zhonghua Nei Ke Za Zhi 1982; 21:741-5, 777. [PMID: 7182137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
312
|
Brick D, Fong D, Heller M, Shapiro AM, Widgoff M, Bruyant F, Lucas P, Bogert D, Johnson M, Burnstein R, Fu C, Petersen D, Robertson M, Rubin H, Sard R, Snyder A, Tortora J, Alyea ED, Chien CY, Pevsner A, Zdanis R, Barriero F, Benary O, Brau JF, Grunhaus J, Hafen ES, Hulsizer RI, Karshon U, Kistiakowsky V, Levy A, Napier A, Pless IA, Silvermann JP, Trepagnier PC, Wolfson J, Yamamoto RK, Cohn H, Jacques PF, Ou TC, Plano RJ, Watts TL, Brucker E, Koller E, Stamer P, Taylor S, Bugg W, Condo G, Handler T, Hart E, Kraybill H, Ljung D, Ludlam T, Taft HD. Leading particles and diffraction dissociation in 150-GeV/cπ−pinteractions. Int J Clin Exp Med 1980. [DOI: 10.1103/physrevd.21.1726] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
313
|
Brick D, Fong D, Heller M, Shapiro AM, Widgoff M, Bruyant F, Bogert D, Johnson M, Burnstein R, Fu C, Petersen D, Robertson M, Rubin H, Sard RD, Snyder A, Tortora J, Alyea ED, Chien CY, Lucas P, Pevsner A, Zdanis R, Barreiro F, Benary O, Brau JE, DeTar CE, Grunhaus J, Hafen ES, Hulsizer RI, Karshon U, Kistiakowsky V, Levy A, Napier A, Pless IA, Silverman JP, Stoughton T, Trepagnier PC, Wolfson J, Yamamoto RK, Cohn HO, Jacques PF, Ou TC, Plano RJ, Watts TL, Brucker EB, Koller E, Stamer P, Taylor S, Bugg WM, Condo G, Handler T, Hart E, Kraybill H, Ljung D, Ludlam T, Taft HD. Average charged-particle multiplicities inπ−pinclusive reactions at 147 GeV/c. Int J Clin Exp Med 1979. [DOI: 10.1103/physrevd.19.743] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
314
|
Brick D, Fong D, Heller M, Shapiro AM, Widgoff M, Bruyant F, Bogert D, Johnson M, Burnstein R, Fu C, Petersen D, Robertson M, Rubin H, Sard R, Snyder A, Tortora J, Alyea ED, Chien CY, Lucas P, Pevsner A, Zdanis R, Barreiro F, Benary O, Brau JE, Grunhaus J, Hafen ES, Hulsizer RI, Karshon U, Kistiakowsky V, Levy A, Napier A, Pless IA, Silverman JP, Trepagnier PC, Wolfson J, Yamamoto RK, Cohn H, Jacques RF, Ou TC, Plano RJ, Watts TL, Brucker EB, Koller EL, Stamer P, Taylor S, Bugg W, Condo G, Handler T, Hart E, Kraybill H, Ljung D, Ludlam T, Taft HD. InclusiveΔ++production inπ−pinteractions at 147 GeV/c. Int J Clin Exp Med 1978. [DOI: 10.1103/physrevd.18.3099] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
315
|
Campbell JH, Charlton G, Engelmann R, Glasser RG, Jaeger K, Mann WA, Oren Y, Peeters P, Whitmore J, Fu C, Rubin HA, Swansson D, Koetke D. Study of Inclusiveγandπ0Production in 12.4-GeV/cppInteractions. Int J Clin Exp Med 1973. [DOI: 10.1103/physrevd.8.3824] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
316
|
|