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Hernandez J, Masa M, Messeguer R, Mitjans F, Adan J, Martinez J, Coll T, Padilla L, Dakhel S, Hervas R. 1058 S100A4 Acts Synergistically With VEGF in Promoting Angiogenesis and a Neutralizing Monoclonal Antibody Against S100A4 Could Be a Novel Strategy to Combat Solid Tumors. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71669-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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102
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French K, Wold J, Martinez J, Hoesch R. Calculation of Infarct-Penumbra Mismatch on CT Perfusion Imaging Using the ABC/2 Method (P05.245). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p05.245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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103
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Sebert M, Pilz C, Hansen C, Martinez J, Penzel T, Fietze I. Langzeitregistrierung und Analyse nächtlicher Lungengeräusche bei obstruktiver Schlafapnoe. Pneumologie 2012. [DOI: 10.1055/s-0032-1302541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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104
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Luo J, Martinez J, Yin X, Sanchez A, Tripathy D, Grammas P. Hypoxia induces angiogenic factors in brain microvascular endothelial cells. Microvasc Res 2012; 83:138-45. [PMID: 22100491 PMCID: PMC3278542 DOI: 10.1016/j.mvr.2011.11.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 09/28/2011] [Accepted: 11/02/2011] [Indexed: 01/01/2023]
Abstract
Hypoxia is increasingly recognized as an important contributing factor to the development of brain diseases such as Alzheimer's disease (AD). In the periphery, hypoxia is a powerful regulator of angiogenesis. However, vascular endothelial cells are remarkably heterogeneous and little is known about how brain endothelial cells respond to hypoxic challenge. The objective of this study is to characterize the effect of hypoxic challenge on the angiogenic response of cultured brain-derived microvascular endothelial cells. Brain endothelial cell cultures were initiated from isolated rat brain microvessels and subjected to hypoxia (1% O(2)) for various time periods. The results showed that hypoxia induced rapid (≤ 0.5h) expression of hypoxia-inducible factor 1α (HIF-1α) and that cell viability, assessed by MTT assay, was unaffected within the first 8h. Examination of brain endothelial cell cultures for pro- and anti-angiogenic proteins by western blot, RT-PCR and ELISA revealed that within 0.5 to 2h of hypoxia levels of vascular endothelial growth factor and endothelin-1 mRNA and protein were elevated. The expression of heme oxygenase-1 also increased but only after 8h of hypoxia. In contrast, similar hypoxia exposure evoked a decrease in endothelial nitric oxide synthase and thrombospondin-2 levels. Exposure of brain endothelial cell cultures to hypoxia resulted in a significant (p<0.001) decrease (94%) in tube length, an in vitro index of angiogenesis, compared to control cultures. The data indicate that, despite a shift toward a pro-angiogenic phenotype, hypoxia inhibited vessel formation in brain endothelial cells. These results suggest that in brain endothelial cells expression of angiogenic factors is not sufficient for the development of new vessels. Further work is needed to determine what factors/conditions prevent hypoxia-induced angiogenic changes from culminating in the formation of new brain blood vessels and what role this may play in the pathologic changes observed in AD and other diseases characterized by cerebral hypoxia.
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105
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Havelka G, Rodriguez M, Moreira E, Tshilis N, Wang Z, Martinez J, Kibbe M. Effective Inhibition of Neointimal Hyperplasia Using A Nitric Oxide-diffusible Balloon Catheter. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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106
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Rodriguez M, Emond Z, Wang Z, Martinez J, Jiang Q, Kibbe M. Insulin Drives the Efficacy of Nitric Oxide Differently in Type 1 Versus Type 2 Diabetic Rats. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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107
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Gregory E, Martinez J, Flynn M, Jiang Q, Webb A, Ameer G, Kibbe M. A Novel All-Trans Retinoic Acid Perivascular Wrap Reduces Neointimal Hyperplasia Following Arterial Balloon Injury. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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108
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Jaramillo F, Sanz J, Montesinos P, Martinez-Cuadron D, Lorenzo I, Palau J, Martin G, Jarque I, De La Rubia J, Moscardó F, Martinez J, Sanz M, Sanz G. Cord Blood Transplantation from Unrelated Donors Versus Stem Cell Transplantation from HLA-Identical Sibling in Adults with Philadelphia-Positive Acute Lymphoblastic Leukemia. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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109
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Sanz J, Jaramillo F, Montesinos P, Martinez-Cuadron D, Lorenzo I, Palau J, Martin G, Jarque I, De La Rubia J, Moscardo F, Martinez J, Sanz M, Sanz G. Epstein-Barr Virus-Related Complications (EBV-RC) After Umbilical Cord Blood Transplantation (UCBT) for Adult Patients with High-Risk Hematologic Malignancies. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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110
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Windauer LB, Martinez J, Rapoport D, Wassner D, Benech-Arnold R. Germination responses to temperature and water potential in Jatropha curcas seeds: a hydrotime model explains the difference between dormancy expression and dormancy induction at different incubation temperatures. ANNALS OF BOTANY 2012; 109:265-273. [PMID: 21917817 PMCID: PMC3241573 DOI: 10.1093/aob/mcr242] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Accepted: 08/10/2011] [Indexed: 05/27/2023]
Abstract
BACKGROUND AND AIMS Jatropha curcas is a drought-resistant tree whose seeds are a good source of oil that can be used for producing biodiesel. A successful crop establishment depends on a rapid and uniform germination of the seed. In this work we aimed to characterize the responses of J. curcas seeds to temperature and water availability, using thermal time and hydrotime analysis, METHODS Thermal and hydrotime analysis was performed on germination data obtained from the incubation of seeds at different temperatures and at different water potentials. KEY RESULTS Base and optimum temperatures were 14·4 and 30 °C, respectively. Approximately 20 % of the seed population displayed absolute dormancy and part of it displayed relative dormancy which was progressively expressed in further fractions when incubation temperatures departed from 25 °C. The thermal time model, but not the hydrotime model, failed to describe adequately final germination percentages at temperatures other than 25 °C. The hydrotime constant, θ(H), was reduced when the incubation temperature was increased up to 30 °C, the base water potential for 50 % germination,Ψ(b(50)), was less negative at 20 and 30 °C than at 25 °C, indicating either expression or induction of dormancy. At 20 °C this less negative Ψ(b(50)) explained satisfactorily the germination curves obtained at all water potentials, while at 30 °C it had to be corrected towards even less negative values to match observed curves at water potentials below 0. Hence, Ψ(b(50)) appeared to have been further displaced to less negative values as exposure to 30 °C was prolonged by osmoticum. These results suggest expression of dormancy at 20 °C and induction of secondary dormancy above 25 °C. This was confirmed by an experiment showing that inhibition of germination imposed by temperatures higher than 30 °C, but not that imposed at 20 °C, is a permanent effect. CONCLUSIONS This study revealed (a) the extremely narrow thermal range within which dormancy problems (either through expression or induction of dormancy) may not be encountered; and (b) the high sensitivity displayed by these seeds to water shortage. In addition, this work is the first one in which temperature effects on dormancy expression could be discriminated from those on dormancy induction using a hydrotime analysis.
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Martin C, Vanthuyne N, Miramon H, Martinez J, Cavelier F. Resolution of protected silaproline for a gram scale preparation. Amino Acids 2011; 43:649-55. [PMID: 22002795 DOI: 10.1007/s00726-011-1112-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Accepted: 09/26/2011] [Indexed: 10/17/2022]
Abstract
Silaproline is an analogue of proline, which exhibits similar conformational properties. Moreover, the presence of dimethylsilyl group confers to silaproline a higher lipophilicity as well as an improved resistance to biodegradation. This report describes the comparison of two routes to obtain Fmoc-(L) Sip-OH on the gram scale using chiral HPLC resolution.
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112
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Mundy CA, Bunyapen C, Martinez J, Bassig E, Bhatia JS. Atypical presentation of a lacrimal duct cyst. J Perinatol 2011; 31:628-9. [PMID: 21879001 DOI: 10.1038/jp.2011.24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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113
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Jarret G, Cozannet P, Martinez J, Dourmad J. Effect of different quality wheat dried distiller's grain solubles (DDGS) in pig diets on composition of excreta and methane production from faeces and slurry. Livest Sci 2011. [DOI: 10.1016/j.livsci.2011.04.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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114
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Martinez J, Nguyen LD, Reutter W, Fan H, Saenger W, Moniot S. Structures of N-acetylmannosamine kinase in complex with ADP/ATP for drug design. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311092208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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115
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Pirnik Z, Bundziková J, Holubová M, Pýchová M, Fehrentz JA, Martinez J, Zelezná B, Maletínská L, Kiss A. Ghrelin agonists impact on Fos protein expression in brain areas related to food intake regulation in male C57BL/6 mice. Neurochem Int 2011; 59:889-95. [PMID: 21843570 DOI: 10.1016/j.neuint.2011.08.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 07/27/2011] [Accepted: 08/01/2011] [Indexed: 12/18/2022]
Abstract
Many peripheral substances, including ghrelin, induce neuronal activation in the brain. In the present study, we compared the effect of subcutaneously administered ghrelin and its three stable agonists: Dpr(3)ghr ([Dpr(N-octanoyl)(3)] ghrelin) (Dpr - diaminopropionic acid), YA GHRP-6 (H-Tyr-Ala-His-DTrp-Ala-Trp-DPhe-Lys-NH(2)), and JMV1843 (H-Aib-DTrp-D-gTrp-CHO) on the Fos expression in food intake-responsive brain areas such as the hypothalamic paraventricular (PVN) and arcuate (ARC) nuclei, the nucleus of the solitary tract (NTS), and area postrema (AP) in male C57BL/6 mice. Immunohistochemical analysis showed that acute subcutaneous dose of each substance (5mg/kg b.w.), which induced a significant food intake increase, elevated Fos protein expression in all brain areas studied. Likewise ghrelin, each agonist tested induced distinct Fos expression overall the PVN. In the ARC, ghrelin and its agonists specifically activated similarly distributed neurons. Fos occurrence extended from the anterior (aARC) to middle (mARC) ARC region. In the latter part of the ARC, the Fos profiles were localized bilaterally, especially in the ventromedial portions of the nucleus. In the NTS, all substances tested also significantly increased the number of Fos profiles in neurons, which also revealed specific location, i.e., in the NTS dorsomedial subnucleus (dmNTS) and the area subpostrema (AsP). In addition, cells located nearby the NTS, in the AP, also revealed a significant increase in number of Fos-activated cells. These results demonstrate for the first time that ghrelin agonists, regardless of their different chemical nature, have a significant and similar activating impact on specific groups of neurons that can be a part of the circuits involved in the food intake regulation. Therefore there is a real potency for ghrelin agonists to treat cachexia and food intake disorders. Thus, likewise JMV1843, the other ghrelin agonists represent substances that might be involved in trials for clinical purposes.
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Menezes AM, Dumith S, Martinez J, Silva AE, Cascaes A, Ferreira F, Dominguez G, Franca G, Dame J, Ngale K, Anselmi L. P2-187 Mental health and smoking among adolescents from a cohort in Southern Brazil. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976j.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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117
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Henry L, Le Gallic L, Garcin G, Coux O, Jumez N, Roger P, Lavabre-Bertrand T, Martinez J, Meunier L, Stoebner P. Proteolytic activity and expression of the 20S proteasome are increased in psoriasis lesional skin. Br J Dermatol 2011; 165:311-20. [DOI: 10.1111/j.1365-2133.2011.10447.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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118
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McCurdy M, Wazni M, Martinez J, Castillo R, Guerrero T. WE-G-BRA-05: Post-Radiation Normalized FDG-PET versus Radiation Dose Correlates with Radiation Pneumonitis Symptoms and the Nitric Oxide Ratio. Med Phys 2011. [DOI: 10.1118/1.3613410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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119
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Abstract
Abstract
The effect that climatic changes can exert on parasitic interactions represents a multifactor problem whose results are difficult to predict. The actual impact of changes will depend on their magnitude and the physiological tolerance of affected organisms. When the change is considered extreme (i.e. unusual weather events that are at the extremes of the historical distribution for a given area), the probability of an alteration in an organisms’ homeostasis increases dramatically. However, factors determining the altered dynamics of host-parasite interactions due to an extreme change are the same as those acting in response to changes of lower magnitude. Only a deep knowledge of these factors will help to produce more accurate predictive models for the effects of extreme changes on parasitic interactions. Extreme environmental conditions may affect pathogens directly when they include free-living stages in their life-cycles and indirectly through reduced resource availability for hosts and thus reduced ability to produce efficient anti-parasite defenses, or by effects on host density affecting transmission dynamics of diseases or the frequency of intraspecific contact. What are the consequences for host-parasite interactions? Here we summarize the present knowledge on three principal factors in determining host-parasite associations; biodiversity, population density and immunocompetence. In addition, we analyzed examples of the effects of environmental alteration of anthropogenic origin on parasitic systems because the effects are analogous to that exerted by an extreme climatic change.
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Vavra A, Martinez J, Lee V, Jiang Q, Fu B, Kibbe M. Early Modulation Of The Injury Response By The Short-acting NO Donor PROLI/NO Leads To Durable Inhibition Of Neointimal Hyperplasia. J Surg Res 2011. [DOI: 10.1016/j.jss.2010.11.478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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121
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Emond Z, Wang Z, Havelka G, Martinez J, Kibbe M. Nitric Oxide Inhibits Neointimal Hyperplasia More Effectively In A Type 1 Diabetic Model With Tight Glucose Control. J Surg Res 2011. [DOI: 10.1016/j.jss.2010.11.482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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122
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Martinez J, Soto S, Martorell J, Riera A, Abarca L, Woods L. Pyogranulomatous Pleuropneumonia and Mediastinitis in Ferrets Associated with Chryseomonas-like Bacteria. J Comp Pathol 2010. [PMCID: PMC7130165 DOI: 10.1016/j.jcpa.2010.09.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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123
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Guerrero T, Martinez J, McCurdy M, Wolski M, McAleer M. Elevation in Exhaled Nitric Oxide Predicts for Radiation Pneumonitis. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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124
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Schmidt J, Garambois V, Rocheblave L, Martinez J, Cavelier F, Pelegrin A, Vivès É. R120 Un tétracyclopeptide inhibiteur de la prolifération métastatique. Bull Cancer 2010. [DOI: 10.1016/s0007-4551(15)31039-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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125
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Servais P, Martinez J, Billen G, Vives-Rego J. Determining [H]Thymidine Incorporation into Bacterioplankton DNA: Improvement of the Method by DNase Treatment. Appl Environ Microbiol 2010; 53:1977-9. [PMID: 16347424 PMCID: PMC204039 DOI: 10.1128/aem.53.8.1977-1979.1987] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Determination of [H] thymidine incorporation into bacterial DNA versus other macromolecules is usually achieved by NaOH and hot trichloroacetic acid hydrolysis. This procedure was found not to be specific enough. An alternative method founded on DNase treatment is proposed. Under the new method, the fraction of thymidine incorporated into DNA ranged from 10 to 83%.
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