The use of lactic acid bacteria to reduce mercury bioaccessibility

Jadán-Piedra, Carlos; Alcántara, Cristina; Monedero, Vicente; Zúñiga, Manuel; Vélez, Dinoraz; Devesa, Vicenta

doi:10.1016/j.foodchem.2017.01.157

Cited by 40 publications

(26 citation statements)

References 55 publications

(43 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The intercellular reduction of Hg (II) ions to elementals, volatile and non-toxic Hg (0) ions was performed by mercuric reductase ( MerA ). After reduction, the Hg (0) ions were efflux to the outside of the cell (Jadán-Piedra et al, 2017). The Zn (II) ions are normally attached with c-type cytochromes of exoelectrogens like OmcA and OmcZ and reduced these cytochromes and finally accumulate inside the cell (Carpio et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

et al. 2019

View full text Add to dashboard Cite

The industrial contamination of marine sediments with mercury, silver, and zinc in Penang, Malaysia was studied with bio-remediation coupled with power generation using membrane less open (aerated) and closed (non-aerated) sediment microbial fuel cells (SMFCs). The prototype for this SMFC is very similar to a natural aquatic environment because it is not stimulated externally and an oxygen sparger is inserted in the cathode chamber to create the aerobic environment in the open SMFC and no oxygen supplied in the closed SMFC. The open and closed SMFCs were showed the maximum voltage generation 300.5 mV (77.75 mW/m2) and 202.7 mV (45.04 (mW/m2), respectively. The cyclic voltammetry showed the oxidation peak in open SMFCs at +1.9 μA and reduction peak at -0.3 μA but in closed SMFCs oxidation and reduction peaks were noted at +1.5 μA and -1.0 μA, respectively. The overall impedance (anode, cathode and solution) of closed SMFCs was higher than open SMFCs. The charge transfer impedance showed that the rates of substrate oxidation and reduction were very low in the closed SMFCs than open SMFCs. The Nyquist arc indicated that O2 act as electron acceptor in the open SMFCs and CO2 in the closed SMFCs. The highest remediation efficiency of toxic metals [Hg (II) ions, Zn (II) ions, and Ag (I) ions] in the open SMFCs were 95.03%, 86.69%, and 83.65% in closed SMFCs were 69.53%, 66.57%, and 65.33%, respectively, observed during 60–80 days. The scanning electron microscope and 16S rRNA analysis showed diverse exoelectrogenic community in the open SMFCs and closed SMFCs. The results demonstrated that open SMFCs could be employed for the power generation and bioremediation of pollutants.

show abstract

Section: Discussionmentioning

confidence: 99%

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Our observations indicate that the poly-P-influenced mechanisms that affect mercury resistance would not necessarily ave an impact on the capacity to accumulate mercury. It has been recently shown that lactobacilli can efficiently sequester Hg(II) as well as CH 3 Hg, the main mercurial form found as food contaminant ( Alcantara et al, 2017 ; Jadan-Piedra et al, 2017 ). However, our results question the role of poly-P in the mercury retention mechanism.…”

Section: Discussionmentioning

confidence: 99%

Polyphosphate in Lactobacillus and Its Link to Stress Tolerance and Probiotic Properties

et al. 2018

View full text Add to dashboard Cite

The synthesis of the inorganic polymer polyphosphate (poly-P) in bacteria has been linked to stress survival and to the capacity of some strains to sequester heavy metals. In addition, synthesis of poly-P by certain strains of probiotic lactobacilli has been evidenced as a probiotic mechanism due to the homeostatic properties of this compound at the intestinal epithelium. We analyzed the link between poly-P synthesis, stress response, and mercury toxicity/accumulation by comparing wild-type strains of Lactobacillus and their corresponding mutants devoid of poly-P synthesis capacity (defective in the poly-P kinase, ppk, gene). Results showed that resistance to salt (NaCl) and acidic (pH 4) stresses upon ppk mutation was affected in Lactobacillus casei, while no effect was observed in two different Lactobacillus plantarum strains. Inorganic [Hg(II)] and organic (CH3Hg) mercury toxicity was generally increased upon ppk mutation, but no influence was seen on the capacity to retain both mercurial forms by the bacteria. Notwithstanding, the culture supernatants of ppk-defective L. plantarum strains possessed a diminished capacity to induce HSP27 expression, a marker for cell protection, in cultured Caco-2 cells compared to wild-type strains. In summary, our results illustrate that the role of poly-P in stress tolerance can vary between strains and they reinforce the idea of probiotic-derived poly-P as a molecule that modulates host-signaling pathways. They also question the relevance of this polymer to the capacity to retain mercury of probiotics.

show abstract

“…All possible process factors which may have an impact on the biosorption yield of Pb and Cd biosorption by L. acidophilus were selected based on literature reviews (Halttunen et al, 2008;Jadán-Piedra et al, 2017;Pakdel, Soleimanian-Zad, & Akbari-Alavijeh, 2018;Singh & Sarma, 2010) including the contact time, size of inoculation, metal concentration, temperature and shaking rate. Then, according to our pre-experiences, the process variables' interaction effects should be examined.…”

Section: Process Variablesmentioning

confidence: 99%

Lead and cadmium biosorption from milk by Lactobacillus acidophilus ATCC 4356

Massoud

Sharifan

Asadi

et al. 2020

Food Science & Nutrition

View full text Add to dashboard Cite

The food and water contamination with heavy metals is increasing due to the environmental pollutions. Heavy metals are the elements with the density of more than 5 g/cm 3 (Rajaganapathy, Xavier, Sreekumar, & Mandal, 2011). Heavy metals have become a serious problem as a result of the urbanization and industrialization. These toxic metals pollute water, soil, plants, and eventually foodstuffs and our bodies. Pb and Cd are the toxic heavy metals for humans that can be found in air, soil, water, and even food. They are in the risky heavy metals' group (Bhakta, Ohnishi, Munekage, Iwasaki, & Wei, 2012; Jin et al., 2019). They are undegradable compounds, and their toxicity in the environment is known as the most dangerous pollutants in the world (Demirbas, 2008). The chemical fertilizers, industrial wastewater, mines are the main sources of releasing Pb and Cd to the environment (Sardar, Hameed, & Afzal, 2013).

show abstract

The use of lactic acid bacteria to reduce mercury bioaccessibility

Cited by 40 publications

References 55 publications

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

Polyphosphate in Lactobacillus and Its Link to Stress Tolerance and Probiotic Properties

Lead and cadmium biosorption from milk by Lactobacillus acidophilus ATCC 4356

Contact Info

Product

Resources

About