251
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Edwards MJ, Taylor AM, Duckworth G. An enzyme activity in normal and ataxia telangiectasia cell lines which is involved in the repair of gamma-irradiation-induced DNA damage. Biochem J 1980; 188:677-82. [PMID: 6451216 PMCID: PMC1161948 DOI: 10.1042/bj1880677] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An enzyme that enhances the activity of DNA polymerase I (EC 2.7.7.7) for gamma-irradiated calf thymus DNA was demonstrated in cellular extracts of normal human fibroblasts and lymphoid-cell lines. This enzyme was found to be deficient in all cellular extracts of fibroblasts and lymphoid-cell lines examined from patients with the autosomal recessive disease ataxia telangiectasia. The activity in cellular extracts from normal fibroblasts was removed when heated to 100 degrees C for 2 min or when the assay was performed at 4 degrees C. No significant deficiency in primer-activating enzyme activity was observed in cell-free extracts of lymphoid lines from patients with xeroderma pigmentosum, Huntington's chorea or neurofibromatosis, or from an ataxia telangiectasia heterozygote.
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252
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Fujikami TK, Taylor AM. [Compact osteoma (report of a clinical case)]. ADM; REVISTA DE LA ASOCIACION DENTAL MEXICANA 1980; 37:182-6. [PMID: 6943914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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253
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Keijzer W, Jaspers NG, Abrahams PJ, Taylor AM, Arlett CF, Zelle B, Takebe H, Kinmont PD, Bootsma D. A seventh complementation group in excision-deficient xeroderma pigmentosum. Mutat Res 1979; 62:183-90. [PMID: 492197 DOI: 10.1016/0027-5107(79)90231-8] [Citation(s) in RCA: 134] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cells from a xeroderma pigmentosum patient XP2BI who has reached 17 years of age with no keratoses or skin tumours constitute a new, 7th complementation group G. These cells exhibit a low residual level of excision repair, 2% of normal after a UV dose of 5 J/m2 and an impairment of post-replication repair characteristic of excision-defective XPs. They are also sensitive to the lethal effects of UV and defective in host-cell reactivation of UV-irradiated SV40 DNA.
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254
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Cunningham I, Taylor AM. Infectivity of Trypanosoma brucei cultivated at 28 C with tsetse fly salivary glands. THE JOURNAL OF PROTOZOOLOGY 1979; 26:428-32. [PMID: 536931 DOI: 10.1111/j.1550-7408.1979.tb04649.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
When transformed procyclic noninfective trypanosomes of several unrelated stocks of Trypanosoma brucei were cultivated in T-30 Falcon flasks at 28 C in a liquid medium containing head-salivary gland explants of Glossina morsitans morsitans some of the organisms developed into forms infective for mice. Infective trypanosomes were detected 7 to 14 days after the cultures were prepared and they persisted for varying periods of up to 88 days when the cultures were terminated. A few of the salivary glands became invaded with parasites about the time infective organisms appeared in the cultures. Using T. brucei TREU 929, it was shown that trypanosomes grown with between 2m and 50 explants were capable of producing infections consistently for prolonged periods. On the other hand, trypanosomes cultivated with 25 or fewer explants rarely infected mice. Infectivity titrations on trypanosome suspensions from cultures of stocks TREU 1275 and TREU 929 revealed that the maximum number of infective organisms was present 26 to 50 days after initiation of the cultures. Control cultures of trypanosomes grown in medium alone were generally not infective but 2 of the 6 stocks gave rise to a few sporadic infections. A few epimastigote-like and metacyclic-like trypanosomes were seen in stained preparations of infective inocula.
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255
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Taylor AM, Rosney CM, Campbell JB. Unusual sensitivity of ataxia telangiectasia cells to bleomycin. Cancer Res 1979; 39:1046-50. [PMID: 85479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Peripheral blood lymphocytes from four patients with ataxia telangiectasia (AT), an inherited disorder showing, among other features, radiosensitivity and a high frequency of cancers, were shown to be cytogenetically more sensitive to bleomycin than were lymphocytes from both normal individuals and a single patient with xeroderma pigmentosum. With cell survival techniques, a biphasic dose-response curve was seen for both normal and AT fibroblasts, although the AT cells showed a much lower survival. The increased sensitivity to bleomycin in AT cells might be expected since it is a radiomimetic drug, but more importantly the known action of bleomycin in producing DNA strand scission suggests that AT cells might be defective in rejoining a proportion of DNA strand breaks.
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256
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257
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Abstract
Visual object recognition was investigated in a group of eighty-one patients with right- or left-hemisphere lesions. Two tasks were used, one maximizing perceptual categorization by physical identity, the other maximizing semantic categorization by functional identity. The right-hemisphere group showed impairment on the perceptual categorization task and the left-hemisphere group were impaired on the semantic categorization task. The findings are discussed in terms of categorical stages of object recognition. A tentative model of their cerebral organization is suggested.
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258
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Abstract
A simplified, more rapid bioassay for the estimation of somatomedin activity, based on the porcine costal cartilage bioassay, is described. A micro-scale system based on the porcine costal cartilage assay is also described. These assay systems showed no decrease in sensitivity or precision, compared with other methods, as a result of the modifications. The assays have been used for routine hospital laboratory determinations, for the estimation of somatomedin activity in normal adolescent children of both sexes and in clinical studies of scoliotic, acromegalic and hypopituitary patients.
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259
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Taylor AM. Unrepaired DNA strand breaks in irradiated ataxia telangiectasia lymphocytes suggested from cytogenetic observations. Mutat Res 1978; 50:407-18. [PMID: 672922 DOI: 10.1016/0027-5107(78)90045-3] [Citation(s) in RCA: 157] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
It is suggested here that the unusually high level of radiation-induced chromosome and chromatid-type aberrations in cells from patients with ataxia telangiectasia, compared with normals, is due to a significantly increased fraction of unrepaired double and single strand breaks. A hypothesis is proposed to explain how unrepaired and misrepaired DNA single or double strand breaks might be the basic lesion leading to the typical chromosome aberrations seen following X-irradiation of both normal or AT cells.
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260
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Curnow RT, Taylor AM, Carey RM, Johanson A, Murad F. Somatostatin lowering of LH levels in a postmenopausal woman. South Med J 1977; 70:871. [PMID: 877653 DOI: 10.1097/00007611-197707000-00032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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261
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Taylor AM, Metcalfe JA, Oxford JM, Harnden DG. Proceedings: The radiosensitivity at the chromosomal level of lymphocytes from patients with ataxia telangiectasia. Br J Radiol 1976; 49:561. [PMID: 1276641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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262
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Taylor AM, Metcalfe JA, Oxford JM, Harnden DG. Is chromatid-type damage in ataxia telangiectasia after irradiation at G0 a consequence of defective repair? Nature 1976; 260:441-3. [PMID: 1256587 DOI: 10.1038/260441a0] [Citation(s) in RCA: 153] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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263
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Harnden DG, Benn PA, Oxford JM, Taylor AM, Webb TP. Cytogenetically marked clones in human fibroblasts cultured from normal subjects. SOMATIC CELL GENETICS 1976; 2:55-62. [PMID: 1028160 DOI: 10.1007/bf01539242] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Clones of cytogenetically abnormal cells have been recognized in fibroblasts cultured from normal human adult skin. No such clones have been observed in human embryo skin fibroblasts cultured in the same way. Although the culture conditions may have played some part in the emergence of these clones, it is possible that the abnormal cells from which the clones were derived were present in vivo.
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264
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Taylor AM, Harnden DG, Arlett CF, Harcourt SA, Lehmann AR, Stevens S, Bridges BA. Ataxia telangiectasia: a human mutation with abnormal radiation sensitivity. Nature 1975; 258:427-9. [PMID: 1196376 DOI: 10.1038/258427a0] [Citation(s) in RCA: 773] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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265
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Riegel RH, Taylor AM. Comparison of conceptual strategies for grouping and remembering employed by EMR and nonretarded children. AMERICAN JOURNAL OF MENTAL DEFICIENCY 1974; 78:592-8. [PMID: 4820208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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266
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Taylor AM. B.V.A. Congress 1973. The President's address to the association. Vet Rec 1973; 93:271-5. [PMID: 4796950 DOI: 10.1136/vr.93.10.271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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267
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Gatt R, Taylor AM, MacPherson W. Team venture in the North East--a study in co-operation with Aberdeen Royal Infirmary and the domiciliary services. NURSING MIRROR AND MIDWIVES JOURNAL 1973; 137:35-6. [PMID: 4490416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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268
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Whitely SE, Taylor AM. Overt verbalization and the continued production of effective elaborations by EMR children. AMERICAN JOURNAL OF MENTAL DEFICIENCY 1973; 78:193-8. [PMID: 4769572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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269
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Taylor AM, Harnden DG, Fairburn EA. Chromosomal instability associated with susceptibility to malignant disease in patients with porokeratosis of Mibelli. J Natl Cancer Inst 1973; 51:371-8. [PMID: 4765365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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270
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Abstract
Immediate recognition memory span and short-term forgetting for non-verbal stimuli (“unfamiliar faces”) were investigated in normal subjects and amnesic patients. Surnames were used as a verbal control. It was found that normal subjects had a reliable immediate recognition span of one for faces and that there was no decrement in performance in the retention of three faces over a 30-s interval. Amnesic subjects were impaired on both the immediate memory span task and on the short-term forgetting task. This pattern of results contrasts with those obtained using surnames on which the results were comparable to other verbal S.T.M. tasks. It is suggested that performance on these tasks of recognition memory for faces is determined by L.T.M. processes. The implications for the interpretation of S.T.M. are discussed.
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271
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Taylor AM, Harnden DG, Fairburn EA. Chromosomal instability and malignant disease in patients with Porokeratosis of Mibelli. Br J Cancer 1973; 28:88. [PMID: 4724634 PMCID: PMC2009083 DOI: 10.1038/bjc.1973.114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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272
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273
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Taylor AM, Josberger M, Whitely SE. Elaboration instruction and verbalization as factors facilitating retarded children's recall. JOURNAL OF EDUCATIONAL PSYCHOLOGY 1973; 64:341-6. [PMID: 4710953 DOI: 10.1037/h0034610] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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274
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275
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Taylor AM. The challenge of diabetic neuropathy in the elderly. Geriatrics (Basel) 1969; 24:146-50. [PMID: 5774578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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276
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Walters CL, Casselden RJ, Taylor AM. Nitrite metabolism by skeletal muscle mitochondria in relation to haem pigments. BIOCHIMICA ET BIOPHYSICA ACTA 1967; 143:310-8. [PMID: 4292888 DOI: 10.1016/0005-2728(67)90085-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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277
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Miller WE, Taylor AM. Biopsy of scalene and supraclavicular lymph nodes: value in diagnosis. CLEVELAND CLINIC QUARTERLY 1965; 32:205-9. [PMID: 5830613 DOI: 10.3949/ccjm.32.4.205] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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278
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Taylor AM. The application of the Spekker photoelectric absorptiometer to the determination of vitamin C. Biochem J 1943; 37:54-8. [PMID: 16747598 PMCID: PMC1257842 DOI: 10.1042/bj0370054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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279
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Taylor AM. Strangulated Hernia. CALIFORNIA STATE JOURNAL OF MEDICINE 1910; 8:399-403. [PMID: 18735106 PMCID: PMC1893693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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