Isolation of a Bacterial Strain Able To Degrade Branched Nonylphenol

Tanghe, Tom; Dhooge, Willem; Verstraete, Willy

doi:10.1128/aem.65.2.746-751.1999

Cited by 125 publications

(31 citation statements)

References 39 publications

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“…The results of the present study are consistent with previous reports of significant biodegradation of 4-NP under oxic conditions in seawater and sediment [19], in soil [20], and in cultures derived from sewage sludge [21][22][23][24][25]. Significant biodegradation of 4-NP was reported in sediments collected from a river in Taiwan and incubated under oxic conditions [26].…”

Section: Mineralization Under Oxic Conditionssupporting

confidence: 92%

“…Little is known about the potential for, or the environmental conditions that may affect, the microbial degradation of 4-NP in stream sediments. Reports of significant biodegradation of 4-NP under oxic conditions in seawater and sediment [19], in soil [20], in cultures derived from sewage sludge [21][22][23][24][25], and in river sediments in Taiwan [26] suggest that biodegradation of 4-NP by stream-sediment microorganisms may be substantial. A number of studies concluding that 4-NP generally is recalcitrant in soil and sediments [9,13,16], however, suggest that efficient 4-NP biodegradation is not ubiquitous and is dependent on favorable environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

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POTENTIAL FOR 4-n-NONYLPHENOL BIODEGRADATION IN STREAM SEDIMENTS

Bradley¹,

Barber²,

Kolpin³

et al. 2007

Environ Toxicol Chem

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The potential for in situ biodegradation of 4-nonylphenol (4-NP) was investigated in three hydrologically distinct streams impacted by wastewater treatment plants (WWTPs) in the United States. Microcosms were prepared with sediments from each site and amended with [U-ring-14 C]4-n-nonylphenol (4-n-NP) as a model test substrate. Microcosms prepared with sediment collected upstream of the WWTP outfalls and incubated under oxic conditions showed rapid and complete mineralization of [U-ring-14 C]4n-NP to 14 CO 2 in all three systems. In contrast, no mineralization of [U-ring-14 C]4-n-NP was observed in these sediments under anoxic (methanogenic) conditions. The initial linear rate of [U-ring-14 C]4-n-NP mineralization in sediments from upstream and downstream of the respective WWTP outfalls was inversely correlated with the biochemical oxygen demand (BOD) of the streambed sediments. These results suggest that the net supply of dissolved oxygen to streambed sediments is a key determinant of the rate and extent of 4-NP biodegradation in stream systems. In the stream systems considered by the present study, dissolved oxygen concentrations in the overlying water column (8-10 mg/L) and in the bed sediment pore water (1-3 mg/L at a depth of 10 cm below the sediment-water interface) were consistent with active in situ 4-NP biodegradation. These results suggest WWTP procedures that maximize the delivery of dissolved oxygen while minimizing the release of BOD to stream receptors favor efficient biodegradation of 4-NP contaminants in wastewater-impacted stream environments.

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Section: Mineralization Under Oxic Conditionssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

POTENTIAL FOR 4-n-NONYLPHENOL BIODEGRADATION IN STREAM SEDIMENTS

Bradley¹,

Barber²,

Kolpin³

et al. 2007

Environ Toxicol Chem

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“…Most studies in which sphingomonad strains capable of xenobiotic degradation have been identified have used enrichment procedures from environmental samples collected from a single sampling location (e.g. Schmidt et al, 1992;Wittich et al, 1992;Tanghe et al, 1999). Clearly, sphingomonad communities acting in situ may be diverse.…”

Section: Discussionmentioning

confidence: 99%

Changes to the structure ofSphingomonasspp. communities associated with biodegradation of the herbicide isoproturon in soil

Shi

Bending

2007

FEMS Microbiology Letters

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The phenyl-urea herbicide isoproturon is a major contaminant of surface and ground-water in agricultural catchments. Earlier work suggested that within-field spatial variation of isoproturon degradation rate resulted from interactions between catabolizing Sphingomonas spp. and pH. In the current study, changes to the structure of Sphingomonas communities during isoproturon catabolism were investigated using Sphingomonas-specific 16S rRNA gene primers. Growth-linked catabolism at high-pH (>7.5) sites was associated with the appearance of multiple new denaturing gradient gel electrophoresis (DGGE) bands. At low-pH sites, there was no change in DGGE banding at sites in which there was cometabolism, but at sites in which there was growth-linked catabolism, degradation was associated with the appearance of a new band not present at high pH sites. Sequencing of DGGE bands indicated that a strain related to Sphingomonas mali proliferated at low pH sites, while strain Sphingomonas sp. SRS2, a catabolic strain identified in earlier work, together with several further Sphingomonas spp., proliferated at high-pH sites. The data indicate that degradation was associated with complex changes to the structure of Sphingomonas spp. communities, the precise nature of which was spatially variable.

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“…Recently, a ubiquitous organism that metabolizes organic compounds and estrogens, Novosphingobium aromaticivorans, found in soil, water, and coastal plain sediments, has been defined within the Sphingomonas family. [73][74][75][76][77][78][79] Importantly, two of the N. aromaticivorans proteins have the highest amino sequence homology with human PDC-E2 among all known bacteria. 80 Moreover, sera from PBC patients reacted against the two known lipoylated bacterial proteins from N. aromaticivorans lysate, with titers up to 10 À6 , including patients with early disease.…”

Section: Microbial Infection and Pbcmentioning

confidence: 99%

Etiology of Primary Biliary Cirrhosis: The Search for the Culprit

Leung¹,

Coppel²,

Gershwin³

2005

Semin Liver Dis

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Primary biliary cirrhosis (PBC) is an organ-specific autoimmune disease characterized by the presence of high titer antimitochondrial autoantibodies (AMAs) and destruction of intrahepatic small bile ducts. Despite vigorous efforts in the characterization of autoantibodies and bile duct histopathology, the etiology of this disease is unclear. Although there is no correlation between the titer of AMAs and disease severity, the presence of AMAs usually occurs before symptoms of liver abnormalities. We believe that the production of AMAs is not an epiphenomenon, and an understanding of the mechanism of AMA induction will shed light on the etiology of PBC. Recent studies have suggested that the induction of PBC is multifactorial, in which the primary player involves the xenobiotics modification of mitochondrial proteins or exposure to xenobiotic-modified bacterial mitochondrial protein homologs, leading to breaking of tolerance to the human mitochondrial autoantigens and eventually liver pathology in genetic susceptible individuals. We discuss the immunophysiological characteristics of biliary epithelial cells, biochemistry of the 2-oxo-acid dehydrogenase complex, and environmental and genetic factors relevant to PBC.

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Isolation of a Bacterial Strain Able To Degrade Branched Nonylphenol

Cited by 125 publications

References 39 publications

POTENTIAL FOR 4-n-NONYLPHENOL BIODEGRADATION IN STREAM SEDIMENTS

POTENTIAL FOR 4-n-NONYLPHENOL BIODEGRADATION IN STREAM SEDIMENTS

Changes to the structure ofSphingomonasspp. communities associated with biodegradation of the herbicide isoproturon in soil

Etiology of Primary Biliary Cirrhosis: The Search for the Culprit

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