Microalgal transformation of progesterone by the terrestrial-isolated cyanobacterium Microchaete tenera

Safiarian, Mohammad S.; Faramarzi, Mohammad Ali; Amini, Mohsen; Soltani, Nepton; Tabatabaei-Sameni, Minoosadat; Hasan-Beikdashti, Morvarid

doi:10.1007/s10811-011-9697-9

Cited by 11 publications

(8 citation statements)

References 26 publications

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“…Natural progestagen progesterone was found biologically degraded within 9 h under aerobic conditions (Figure ). This is consistent with previous studies on microbial degradation of progesterone. ,− The first order reaction kinetic model was often used to describe the biodegradation of progesterone in activated sludge and animal manure. , In the present study, the fits of both zero order reaction kinetics and first order reaction kinetics for progesterone degradation data were significant ( p < 0.0001) and had the r 2 values of 0.964 for the zero order model and 0.749 for the first order model (Table and Figure ). In comparison, it is apparent that the zero order kinetic model explained the degradation data significantly better than the first order kinetic model.…”

Section: Resultssupporting

confidence: 91%

“…Fast degradation was reported for progesterone by manure-borne bacteria under aerobic conditions with half-lives of less than 24 h . Much slower degradation was found for progesterone by microalgae and fungi, with its half-lives between several days and tens of days.…”

Section: Introductionmentioning

confidence: 94%

“…Up to now, there have been no detailed studies on biodegradation of the synthetic progestogen norgestrel, which has been detected at concentrations up to 10.8 μg/L in wastewater. 14 For the natural progesterone, very limited studies have been done on biodegradation, which have mainly focused on degradation by different types of microorganisms including manure-borne bacteria, 25 microalgae, 26 and fungi. 27 Fast degradation was reported for progesterone by manure-borne bacteria under aerobic conditions with half-lives of less than 24 h. 25 Much slower degradation was found for progesterone by microalgae 26 and fungi, 27 with its half-lives between several days and tens of days.…”

Section: ■ Introductionmentioning

confidence: 99%

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Degradation of Norgestrel by Bacteria from Activated Sludge: Comparison to Progesterone

Liu¹,

Ying²,

Yousheng³

et al. 2013

Environ. Sci. Technol.

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Natural and synthetic progestagens in the environment have become a concern due to their adverse effects on aquatic organisms. Laboratory studies were performed to investigate aerobic biodegradation of norgestrel by bacteria from activated sludge in comparison with progesterone, and to identify their degradation products and biotransformation pathways. The degradation of norgestrel followed first order reaction kinetics (T 1/2 = 12.5 d), while progesterone followed zero order reaction kinetics (T 1/2 = 4.3 h). Four and eight degradation products were identified for norgestrel and progesterone, respectively. Six norgestrel-degrading bacterial strains (Enterobacter ludwigii, Aeromonas hydrophila subsp. dhakensis, Pseudomonas monteilii, Comamonas testosteroni, Exiguobacterium acetylicum, and Chryseobacterium indologenes) and one progesterone-degrading bacterial strain (Comamonas testosteroni) were successfully isolated from the enrichment culture inoculated with aerobic activated sludge. To our best knowledge, this is the first report on the biodegradation products and degrading bacteria for norgestrel under aerobic conditions.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 94%

Section: ■ Introductionmentioning

confidence: 99%

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Degradation of Norgestrel by Bacteria from Activated Sludge: Comparison to Progesterone

Liu¹,

Ying²,

Yousheng³

et al. 2013

Environ. Sci. Technol.

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“…According to many authors, a large number of phytoplankton strains are able to convert pharmaceutical pollutants in surface water and wastewater into useful metabolites (Gentili and Fick 2017;Ojoghoro et al 2017;. Safiarian et al (2012) studied the bioconversion efficiency of progesterone in the range of 50 to 400 mg L −1 by cyanobacterium Microchaete tenera. They show that the optimum concentration of progestagen, which gave maximum bioconversion efficiency, was 250 mg L −1 and higher concentrations (400 mg L −1 ) inhibited the bioconversion completely.…”

Section: Discussionmentioning

confidence: 99%

Inhibition of growth of Anabaena variabilis population by single and mixed steroid hormones

et al. 2018

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Many contaminants which are toxic and adversely affect living organisms enter surface waters. Among them, there are endocrine compounds such as steroid hormones, which can disrupt the endocrine system causing an adverse effect on the physiology of aquatic organisms. In the literature, there is not enough information about the influence of steroid hormones on phytoplankton growth. Therefore, the aim of this research was to study the effect of estrogens (estrone, 17ß-estadiol, 17-α-ethinylestradiol, and estriol), progestagens (progesterone, 5-pregnen-3b-ol-20-one, and levonorgestrel), and androgens (testosterone) on the growth of the cyanobacterium Anabaena variabilis. To our best knowledge, the chronic toxicological effects of hormones on cyanobacteria are explored for the first time. ), while estrone, estriol, and levonorgestrel showed no significant effect on the growth of this cyanobacterium. Hormone mixtures have been found to be more toxic than single substances and exposure to them leads to the potentiation of toxicity. The EC 50 after 14 days of the test duration for the mixed steroid hormones were 45.14, 37.00, and 89.46 mg L −1. This research provides a basic understanding of hormone toxicity to aquatic organism, such as cyanobacteria, and asserts a more comprehensive view on ecological risk evaluation.

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“…The other genera Microchaete, [Thuret 1875] Bornet et Flahault 1886, is a filamentous, heterocystous cyanobacterium that belongs to the family Microchaetaceae, Division Cyanophyta generally found in ponds, rice paddy fields, fresh water lakes, and marine environments [10][11][12] . Usually filaments are attached by one end to a substratum, single or with colonies of many filaments which are arranged irregularly or forming a turf.…”

Section: Introductionmentioning

confidence: 99%

Isolation and Characterization of Two Cyanobacterial Strains Calothrix Sp. and Microchaete Sp. from Rice Fields of Karimganj District, Assam, North East India

Thajamanbi

Rout

Thajuddin

2016

Curr. World Environ

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Studies on various nitrogen fixing microalgal strains found in the rice paddy field soils are carried out in different parts of the world. In the present study two cyanobacterial strains belonging to the order nostocales, Calothrix sp. and Microchaete sp. were isolated from the rice fields of Karimganj district, South Assam, India and characterized based on their morphological, biochemical and molecular analysis. For the phenotypic characterization -growth, pigments (chlorophyll a, total carotenoid content, phycobiliproteins) and biochemical properties (total carbohydrate and soluble proteins) were studied. The study showed that both strains contain lower phycoerythrin content as compared to the other pigments. The Microchaete strain contain a higher total carotenoid content while chlorophyll a accumulation was higher in the Calothrix strain. Phylogenetic compairision was made using 16S rRNA gene sequences including other sequences of Calothrix, Microchaete and Tolypothrix species from GenBank. The results showed that polyphasic approach provides necessary information for the identification of cyanobacterial species using morphological analysis in combination with molecular techniques.

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Microalgal transformation of progesterone by the terrestrial-isolated cyanobacterium Microchaete tenera

Cited by 11 publications

References 26 publications

Degradation of Norgestrel by Bacteria from Activated Sludge: Comparison to Progesterone

Degradation of Norgestrel by Bacteria from Activated Sludge: Comparison to Progesterone

Inhibition of growth of Anabaena variabilis population by single and mixed steroid hormones

Isolation and Characterization of Two Cyanobacterial Strains Calothrix Sp. and Microchaete Sp. from Rice Fields of Karimganj District, Assam, North East India

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