Elsevier

Nutrition

Volume 23, Issue 2, February 2007, Pages 164-171
Nutrition

Basic nutritional investigation
Protective effects of D-glucaro 1,4-lactone against oxidative/nitrative modifications of plasma proteins

https://doi.org/10.1016/j.nut.2006.11.003Get rights and content

Abstract

Objective

The protective effects of D-glucaro 1,4-lactone (1,4-GL) against oxidative/nitrative protein damage (determined by parameters such as levels of protein carbonyl groups and nitrotyrosine residues) to human plasma treated with peroxynitrite (ONOO) or hydroperoxide (H2O2) were studied in vitro. We also investigated the effects of 1,4-GL on the level of total free thiol groups and low-molecular-weight thiols (glutathione and homocysteine) in plasma treated with ONOO (0.1 mM).

Methods

Levels of carbonyl groups and nitrotyrosine residues in human plasma proteins were measured by ELISA and a competition ELISA, respectively. High-performance liquid chromatography (HPLC) was used to analyze free thiols from plasma.

Results

Exposure of plasma to ONOO (0.1 mM) resulted in an increase of the level of carbonyl groups and nitrotyrosine residues in plasma proteins and in a distinct decrease in total thiols and low-molecular-weight thiols (glutathione and homocysteine) measured by high-performance liquid chromatography. In the presence of 1,4-GL (0.4–6.4 mM), a distinct decrease in carbonyl group formation and tyrosine nitration in plasma proteins and changes in plasma thiols caused by 0.1 mM of peroxynitrite were observed. Moreover, 1,4-GL inhibited plasma protein oxidation induced by H2O2 (2 mM).

Conclusion

The obtained results indicate that in vitro 1,4-GL has inhibitory effects on ONOO- or hydroperoxide-mediated oxidative stress in human plasma and changes plasma redox thiol status. The mechanism of the antioxidative action of 1,4-GL present in plasma is not known yet.

Introduction

D-glucaro 1,4-lactone (1,4-GL) is formed in the gastrointestinal tract from D-glucaric acid or its salts and is transported to blood where it can have effects on blood components [1]. D-glucaric acid is a natural, non-toxic compound found in large amounts in many different fruits and vegetables, with the highest concentrations in oranges, apples, grapefruits, and cruciferous vegetables; it also may be produced in small amounts by mammals (including humans) [2]. 1,4-GL possesses detoxifying and anticarcinogenic properties, attributed to an ability to increase glucuronidation and excretion of potentially toxic compounds [3]. 1,4-GL with some biological properties is the most pharmacologically active metabolite of D-glucaric acid. It is a β-glucuronidase inhibitor [4]. The aim of the present study was to estimate the direct effects of 1,4-GL on changes induced by strong biological oxidants, i.e., peroxynitrite (ONOO) and hydroperoxide (H2O2), in plasma proteins and on the level of total free thiol groups and low-molecular-weight thiols such as glutathione and homocysteine (HCSH) in plasma. The defense mechanisms against oxidative stress (ONOO and H2O2 action) are very important for biological activities of human plasma components. Moreover, the role of exogenous antioxidants (present in the human diet) in the defense against oxidative stress in human plasma is still unknown. Therefore, the protective effects of 1,4-GL against the oxidative/nitrative damage of human plasma proteins and low-molecular-weight thiols (glutathione and HCSH as important components of plasma redox thiol status) induced by ONOO (0.1 mM) and H2O2 (2 mM) were studied. The concentration of ONOO used in our experiments was relatively high. The lifetime of ONOO at physiologic pH is very short, with its half-time being of the order of 1 s. Exposure to a bolus of 250 μM of ONOO is equivalent to 7 min of exposure to a steady-state ONOO concentration of 1 μM. This concentration could be readily formed at sites of inflammation, where production rates of nitric oxide radicals (NO) and superoxide radicals considerably increase [5].

Section snippets

Materials

Peroxynitrite was synthesized according to the method of Pryor and Squadrito [6]. Freeze fractionation (−70°C) of the peroxynitrite solution formed a yellow top layer, which was retained for further studies. The top layer typically contained 80–100 mM of peroxynitrite as determined spectrophotometrically at 302 nm in 0.1 M of NaOH (ϵ302nm = 1679 M/cm). Some experiments were also performed with decomposed ONOO, which was prepared by allowing the ONOO to decompose at neutral pH (7.4) in 100 mM

Results

Our studies showed that 1,4-GL decreased the oxidation of plasma proteins (measured as the level of carbonyl groups by ELISA) caused by treatment of plasma with two different strong oxidants (2 mM of H2O2 or 0.1 mM of ONOO). The decrease induced by 1,4-GL was statistically significant (P < 0.05; Fig. 1) and inhibition was dose dependent. 1,4-GL at the highest concentration (6.4 mM) decreased carbonyl group formation in plasma proteins treated with ONOO (0.1 mM) by approximately 40% (Fig. 1).

Discussion

Proteins may be the initial targets of reactive oxygen species or reactive nitrogen species (ROS/RNS) [14], [15]. It has been demonstrated that reaction of proteins with ROS/RNS results in the oxidation and nitration of some amino acid residues, loss of protein thiol groups, formation of aggregates, or fragmentation of proteins. In oxidized proteins new carbonyl groups and protein hydroperoxides are also formed. Among the various oxidative modifications of proteins, formation of carbonyl groups

References (51)

  • C.D. Reiter et al.

    Superoxide reacts with nitric oxide to nitrate tyrosine at physiological pH via peroxynitrite

    J Biol Chem

    (2000)
  • H. Ischiropoulos et al.

    Peroxynitrite-mediated oxidative protein modifications

    FEBS Lett

    (1995)
  • H. Ischiropoulos

    Biological tyrosine nitration: a pathophysiological function of nitric oxide

    Arch Biochem Biophys

    (1998)
  • H. Ischiropoulos

    Biological selectivity and functional aspects of protein tyrosine nitration

    Biochem Biophys Res Commun

    (2003)
  • R. Radi et al.

    Peroxynitrite-induced membrane lipid peroxidation; the cytotoxic potential of superoxide and nitric oxide

    Arch Biochem Biophys

    (1991)
  • B. Olas et al.

    The effects of antioxidants on peroxynitrite-induced changes in platelet proteins

    Thromb Res

    (2004)
  • E. Mayer et al.

    Homocysteine and coronary atherosclerosis

    J Am Coll Cardiol

    (1996)
  • X. Yang et al.

    Plasma homocysteine thiolactone adducts associated with risk of coronary heart disease

    Clin Chim Acta

    (2006)
  • C.A. Elliger et al.

    Caffeyi esters of glucaric acid in Lycopersicon esculentum leaves

    Phytochemistry

    (1981)
  • B. Risch et al.

    (E)-O-p-cumaroyl-, (E)-O-feruloyl-derivatives of glucaric acid in citrus

    Phytochemistry

    (1988)
  • G. Kessler et al.

    Metabolism of D-glucuronic acid and D-galacturonic acid in Phaseolus aureus seedlings

    J Biol Chem

    (1961)
  • G.A. Levvy et al.

    β-Glucuronidase and the hydrolysis of glucuronides

  • F.J. Dowell et al.

    The effects of peroxynitrite on rat aorta: interaction with glucose and related substances

    Eur J Pharmacol

    (1997)
  • C.L. Hawkins et al.

    Direct detection and identification of radicals generated during the hydroxyl radical-induced degradation of hyaluronana and related materials

    Free Radic Biol Med

    (1996)
  • M. Hanausek et al.

    Detoxifying cancer causing agents to prevent cancer

    Integr Cancer Ther

    (2003)
  • Cited by (23)

    • Alternative raw materials in kombucha production

      2022, International Journal of Gastronomy and Food Science
      Citation Excerpt :

      Other strains may have different metabolic pathways in the fermented kombucha, which consequently influences the DSL content of the beverage. Considered responsible for reducing hyperglycemia and for the hepatoprotective effects of kombucha (Bhattacharya et al., 2011, 2013b), DSL can also decrease the loss of heparin, hyaluronic acid, sulfated glycosaminoglycans, and glucuronic acid in the body in addition to having antioxidants properties (Olas et al., 2007; Saluk-Juszczak et al., 2008; Wang et al., 2010). The presence and concentration of the organic acids and the other chemical components of kombucha vary according to the microbial composition of the SCOBY, tea types and amount used, the concentration of sugar and inoculum, fermentation time and temperature.

    • Effect of Kombucha, a fermented black tea in attenuating oxidative stress mediated tissue damage in alloxan induced diabetic rats

      2013, Food and Chemical Toxicology
      Citation Excerpt :

      This compound is considered to be the most healthful and crucial functional component found in KT (Yang et al., 2008, 2009; Wang et al., 2010). According to Olas et al. (2007), DSL possesses protective effects against oxidative/nitrative modifications of plasma proteins and blood platelets (Saluk-Juszcak et al., 2008). Moreover, a combination of DSL and phenolic compounds augments the antioxidative property of DSL (Olas et al., 2008).

    • D-Saccharic acid 1,4-lactone protects diabetic rat kidney by ameliorating hyperglycemia-mediated oxidative stress and renal inflammatory cytokines via NF-κB and PKC signaling

      2013, Toxicology and Applied Pharmacology
      Citation Excerpt :

      d-Saccharic acid 1,4-lactone (DSL) is a derivative of d-glucaric acid and is present in dietary plants like cruciferous vegetables, citrus fruits, apples, etc. (Walaszek et al., 1996). It is a beta-glucuronidase inhibitor (Horton and Walaszek, 1982) and is known to possess antioxidative (Olas et al., 2007; Saluk-Juszcak et al., 2008), anticarcinogenic (Hanausek et al., 2003) and cholesterol lowering properties (Walaszek et al., 1996). DSL has also been found to reduce the activation of blood platelets (Saluk-Juszcak et al., 2008).

    • Taurine ameliorate alloxan induced oxidative stress and intrinsic apoptotic pathway in the hepatic tissue of diabetic rats

      2013, Food and Chemical Toxicology
      Citation Excerpt :

      Terminal transferase mediated dUTP nick end-labeling of nuclei was performed by using APO-BrdU TUNEL Assay kit (A-23210; Molecular Probes, Eugene, OR) following the manufacturer’s protocol. After isolating fresh mitochondria from hepatic tissue of the experimental rats (Kayal et al., 2004) its purity was determined by the measurement of succinate dehydrogenase (Rotem et al., 2005) and mitochondrial membrane potential (Δψm) was estimated on the basis of cell retention of the fluorescent cationic probe rhodamine 123 (Olas et al., 2007). The fluorescence of rhodamine 123 was determined using BD-LSR flow cytometer.

    • D-saccharic acid-1,4-lactone ameliorates alloxan-induced diabetes mellitus and oxidative stress in rats through inhibiting pancreatic beta-cells from apoptosis via mitochondrial dependent pathway

      2011, Toxicology and Applied Pharmacology
      Citation Excerpt :

      To suppress the oxidative stress mediated damage in diabetic pathophysiology, researchers usually look for naturally occurring antioxidants (Manna et al., 2009, 2010b) present in normal diet. In this regard, special focus has been given recently on d-glucaric acid and its derivatives present in dietary plants like cruciferous vegetables, citrus fruits, apples, etc. because of their antioxidative properties (Walaszek et al., 1996; Olas et al., 2007). These compounds are formed as the end products of the d-glucuronic acid pathway (Hoffmann, 2002).

    View all citing articles on Scopus

    This work is supported by the grant 506/810 from the University of Lodz.

    View full text