951
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Anderson GM, Young JG, Cohen DJ, Schlicht KR, Patel N. Liquid-chromatographic determination of serotonin and tryptophan in whole blood and plasma. Clin Chem 1981. [DOI: 10.1093/clinchem/27.5.775] [Citation(s) in RCA: 116] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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952
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Johnson BK, Gichogo A, Gitau G, Patel N, Ademba G, Kirui R, Highton RB, Smith DH. Recovery of o'nyong-nyong virus from Anopheles funestus in Western Kenya. Trans R Soc Trop Med Hyg 1981; 75:239-41. [PMID: 6272457 DOI: 10.1016/0035-9203(81)90325-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
O'nyong-nyong (ONN) virus first appeared nearly 20 years ago and was responsible for one of the largest arbovirus outbreaks ever documented. Since the original outbreak ended, ONN activity, as determined serologically, gradually declined on the Kano Plain in western Kenya. In June, 1978, a virus similar or identical to ONN was isolated from a pool of Anopheles funestus Giles captured at Ahero on the Kano Plain. The possible implications of this isolation are discussed.
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953
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Dach J, Patel N, Patel S, Petasnick J. Peritoneal mesothelioma: CT, sonography, and gallium-67 scan. AJR Am J Roentgenol 1980; 135:614-6. [PMID: 6773389 DOI: 10.2214/ajr.135.3.614] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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954
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Abstract
Multiple factors have been described as significant contributors to depression in medical patients. This study attempts to assess the relative significance and interrelationship of variables associated with depression. A group of 199 family practice patients were studied. Using a multivariate research design, significant depressive symptoms were found in 41% of the sample. A stepwise multiple regression analysis revealed that the five most important factors associated with depression, in order of significance, were socioeconomic status, recent stress, use of birth control pills, serious physical illness, and distant life events. This study supports the thesis that depression is a final common pathway syndrome in which biologic and social forces coalesce into syndrome expression. The primary care practitioner needs to be aware of the multiple risk factors for depression to develop effective detection and intervention strategies.
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955
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Marks LM, Patel N, Kurtides ES. Hematologic abnormalities associated with intravenous lipid therapy. A case report. Am J Gastroenterol 1980; 73:490-5. [PMID: 7424868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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956
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Davies PJ, Daisley RW, Patel N. Particulate contamination in parenteral solutions [proceedings]. J Pharm Pharmacol 1979; 31 Suppl:59P. [PMID: 42735 DOI: 10.1111/j.2042-7158.1979.tb11607.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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957
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Nyindo M, Patel N, Darji N, Golder TK. Trypanosoma brucei: in vitro propagation of metacyclic forms derived from the salivary glands of Glossina morsitans. J Parasitol 1979; 65:751-5. [PMID: 512767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
1 Metacyclic forms of Trypanosoma brucei obtained from the salivary glands of the tsetse fly, Glossina morsitans have been cultured for the first time in their infective forms for more than 200 days in continuous culture. The parasites were grown at 25 C and 30 C on a bovine embryonic spleen (BESP) feeder layer in buffered RPMI 1640 medium supplemented with 20% heat-inactivated bovine fetal serum (BFS) and 5% lactalbumin hydrolysate. Initial growth rate was enhanced when normal, noninfected, salivary glands were added to the cultures. The parasites thus cultured appeared like slender or intermediate blood stream forms which were infective to rats and mice. Addition of rat anti-T. brucei specific antiserum to the cultures caused agglutination of the parasites and rendered them noninfective. This study opens up new areas of investigating sleeping sickness. The cultured metacyclic parasites have the potential of being applied as antigens for controlling African trypanosomiasis.
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958
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Nyindo M, Patel N, Darji N, Golder TK. Trypanosoma brucei: In vitro Propagation of Metacyclic Forms Derived from the Salivary Glands of Glossina morsitans. J Parasitol 1979. [DOI: 10.2307/3280356] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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959
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Gould L, Klein K, Patel N. Ultrasound evaluation of a spermatic cord myxoliposarcoma. THE JOURNAL OF THE MEDICAL SOCIETY OF NEW JERSEY 1979; 76:203-5. [PMID: 286066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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960
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Henry MJ, McColl DD, Crawford JW, Patel N. Computing techniques for intrapartum physiological data reduction. II. Fetal heart rate. J Perinat Med 1979; 7:215-28. [PMID: 480105 DOI: 10.1515/jpme.1979.7.4.215] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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961
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Henry MJ, McColl DD, Crawford JW, Patel N. Computing techniques for intrapartum physiological data reduction. I. Uterine activity. J Perinat Med 1979; 7:209-14. [PMID: 480104 DOI: 10.1515/jpme.1979.7.4.209] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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962
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Nyindo M, Chimtawi M, Owor J, Kaminjolo JS, Patel N, Darji N. Sleeping Sickness: In vitro Cultivation of Trypanosoma brucei from the Salivary Glands of Glossina morsitans. J Parasitol 1978. [DOI: 10.2307/3279721] [Citation(s) in RCA: 4] [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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963
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Nyindo M, Chimtawi M, Owor J, Kaminjolo JS, Patel N, Darji N. Sleeping sickness: in vitro cultivation of Trypanosoma brucei from the salivary glands of Glossina morsitans. J Parasitol 1978; 64:1039-43. [PMID: 739298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Two strains of Trypanosoma brucei were propagated from the salivary glands of 5 Glossina morsitans for more than 200 days on a bovine embryonic spleen feeder layer using buffered RPMI 1640 medium supplemented with 20% bovine fetal serum. In the first 2 to 3 weeks of cultivation the density of parasites in the salivary glands and culture medium remained constant probably because of defective binary fission. The parasites were infective to rodents only on days 17 and 25. Electron microscopic examination of the parasites on 6 different occasions revealed that they were similar to the immature metatrypomastigotes of T. brucei described in the salivary glands of infected tsetse flies.
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964
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Nyindo M, Darji N, Kaminjolo JS, Chimtawi M, Patel N, Onyango P. Trypanosoma brucei-cultivation in vitro of infective forms derived from the midgut of Glossina morsitans. J Parasitol 1978; 64:469-74. [PMID: 660382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Infective forms of Trypanosoma brucei derived from the midgut of Glossina morsitans, have been propagated in vitro for 61 days on a bovine embryonic spleen (BESP) feeder layer using RPMI 1640 medium. It was reproducibly shown that only parasites cultured from the midgut of tsetse flies 12-14 hr after feeding on infected animals could be established in vitro. Cultures thus established were infective to rats and tsetse flies. Only midgut vector types of the parasites were identified by light and electron microscopic techniques.
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965
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Nyindo M, Darji N, Kaminjolo JS, Chimtawi M, Patel N, Onyango P. Trypanosoma brucei: Cultivation In vitro of Infective Forms Derived from the Midgut of Glossina morsitans. J Parasitol 1978. [DOI: 10.2307/3279785] [Citation(s) in RCA: 4] [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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966
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Patel N, Stenmark-Cox SL, Jensen RA. Enzymological basis of reluctant auxotrophy for phenylalanine and tyrosine in Pseudomonas aeruginosa. J Biol Chem 1978; 253:2972-8. [PMID: 417080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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967
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Patel N, Stenmark-Cox S, Jensen R. Enzymological basis of reluctant auxotrophy for phenylalanine and tyrosine in Pseudomonas aeruginosa. J Biol Chem 1978. [DOI: 10.1016/s0021-9258(17)40790-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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968
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Jensen RA, Zamir L, Saint Pierre M, Patel N, Pierson DL. Isolation and preparation of pretyrosine, accumulated as a dead-end metabolite by Neurospora crassa. J Bacteriol 1977; 132:896-903. [PMID: 144721 PMCID: PMC235593 DOI: 10.1128/jb.132.3.896-903.1977] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Pretyrosine is an amino acid intermediate of phenylalanine and/or tyrosine biosyntheses in a variety of organisms. A procedure for the isolation of high-quality pretyrosine as the barium salt is described. Stable solutions of ammonium pretyrosine that are suitable for use as substrate in enzyme assays can be prepared in good yield with relatively few purification steps. A triple mutant of Neurospora crassa, bearing genetic blocks corresponding to each initial enzyme step of the three pathway branchlets leading to the aromatic amino acids, accumulates prephenate and pretyrosine. Although the time courses of prephenate and pretyrosine accumulations were found to be parallel in any given experiment, the ratios of the two metabolites varied as much as 100-fold depending upon such variables as carbon source, temperature of growth, accumulation, and especially the presence of aromatic pathway metabolites. Under appropriate nutritional conditions of accumulation, pretyrosine concentrations in excess of 4 mM in culture supernatant fluids were obtained. Strains individually auxotrophic for phenylalanine or tyrosine accumulate lesser amounts of prephenate and pretyrosine. The metabolic blocks of the mutant result in high intracellular levels of prephenate, which is then partially transaminated to pretyrosine. In N. crassa, pretyrosine is a dead-end metabolite since it is not enzymatically converted to phenylalanine or tyrosine. At a mildly acidic pH, pretyrosine is quantitatively converted to phenylalanine in a nonenzymatic reaction.
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969
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Strauss RR, Patel N, Patel C. Suppression of the immune response in Balb/c mice by trypan blue. JOURNAL OF THE RETICULOENDOTHELIAL SOCIETY 1977; 22:533-43. [PMID: 338896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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970
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Patel N, Pierson DL, Jensen RA. Dual enzymatic routes to L-tyrosine and L-phenylalanine via pretyrosine in Pseudomonas aeruginosa. J Biol Chem 1977; 252:5839-46. [PMID: 407230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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971
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Patel N, Pierson DL, Jensen RA. Dual enzymatic routes to L-tyrosine and L-phenylalanine via pretyrosine in Pseudomonas aeruginosa. J Biol Chem 1977. [DOI: 10.1016/s0021-9258(17)40099-8] [Citation(s) in RCA: 101] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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972
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Gandhewar RN, Patel N, Wagholikar UL. Mucoepidermoid tumour of lacrimal gland. Indian J Ophthalmol 1977; 25:35-6. [PMID: 612590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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973
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Patel N, Moyed HS, Kane JF. Properties of xanthosine 5'-monophosphate-amidotransferase from Escherichia coli. Arch Biochem Biophys 1977; 178:652-61. [PMID: 189701 DOI: 10.1016/0003-9861(77)90237-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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974
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Clapp JF, Abrams RM, Patel N. Fetal metabolism during recovery from surgical stress. GYNECOLOGIC INVESTIGATION 1977; 8:299-306. [PMID: 612494 DOI: 10.1159/000301106] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
10 fetal lambs prepared with sampling catheters in the common umbilical vein and distal aorta were studied at 2 h, 2 and 4 days postoperatively. Umbilical blood flow was measured by a diffusion equilibrium method. Oxygen, lactate, pyruvate, glucose and alpha-amino nitrogen concentrations were determined on umbilical arterial (UA) and umbilical vein (UV) blood. Fetal oxygen consumption averaged 10.4, 10.6 and 1.0 ml.kg-1.min-1 for the three study periods. Lactate/pyruvate ratios were higher in UV than in UA in 17 of 20 experiments. Significant reductions (p less than 0.05) in (1) maternal mixed venous-UA glucose concentration difference, and (2) UA glucose concentrations occurred at 2 and 4 days compared to the 2-hour period. Fetal alpha-amino nitrogen balance was negative at the 2-hour period, but positive 2 days and 4 days postoperatively.
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975
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