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Gadolinium chloride attenuates acetic acid-evoked colitis in mice by reducing neutrophil infiltration and pro-oxidative enzyme activity

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Abstract

This study investigated the potential of gadolinium chloride (GdCl3), an inhibitor of kupffer cells on the myeloperoxidase (MPO) function, both in vivo on colon inflammation model and in vitro on thioglycollate-elicited peritoneal neutrophils. Colon inflammation was induced in mice (n = 7) by 4% acetic acid (AA) enema. GdCl3 (10 mg/kg) treatment was given 24 h before AA challenge. Clinical changes during the protocol were scored. Colons were segmented into distal and proximal parts for histological and biochemical assessment. Furthermore, myeloperoxidase (MPO) enzymes were extracted and analyzed by western blot. Short-term GdCl3 treatment inhibited dose-dependently superoxide anion (O2·−), alkaline phosphatase (ALP), and MPO release and promoted neutrophil apoptosis. In vivo, low-dose GdCl3 improved colitis scores and inhibited acute phagocyte recruitment and colon damage within the mucosa as revealed by the decrease in MPO, nitric oxide (NO), and malondialdehyde (MDA) levels. At the same time, GdCl3 restored catalase (CAT), superoxide dismutase (SOD) activities, and reduced glutathione (GSH) levels, thus reversing the MDA/GSH ratio in both distal and proximal colons. Compared to proximal, distal colon was more altered and displayed higher pathological manifestations. Lastly, the induction of apoptosis and regulation of the major nitrosative and oxidative functions of neutrophils by GdCl3 suggests its consideration as a beneficial tool in attenuating colon inflammation.

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Abbreviations

ALP:

Alkaline phosphatase

AO:

Acridine orange hemi(zinc chloride) salt

CAT:

Catalase

C5a:

Complement fraction 5a

Ca2 + :

Calcium

Col:

Colitis

CD:

Crohn disease

DAI:

Disease activity index

fMLP:

Formyl-methionyl-leucyl-phenylalanine

GdCl3 :

Gadolinium(III) chloride

GSH:

Reduced glutathione

H2O2 :

Hydrogen peroxide

HBSS:

Hanks’ balanced salt solution

HEPES:

4-(2-Hydroxyethyl) piperazine-1-ethanesulfonic acid

H&E:

Hematoxylin and eosin

IBD:

Inflammatory bowel disease

IL-8:

Interleukin-8

iNOS:

Inducible nitric oxide synthase

INFγ:

Interferon gamma

LPS:

Lipopolysaccharides

LTB4:

Leukotriene B4

MTT:

Methylthiazol tetrazolium

MPO:

Myeloperoxidase

NBT:

Nitrotetrazolium blue chloride

NO:

Nitric oxide

NF-κB:

Nuclear factor-kappa B

PAF:

Platelet-activating factor

PBS:

Phosphate buffer saline

PMA:

Phorbol 12-myristate 13-acetate

PN:

Polynuclear neutrophils

PNC:

Platelet-neutrophil complexes

pNPP:

p-Nitrophenol-phosphate

PSGL-1:

P-selectin glycoprotein ligand-1

ROS:

Reactive oxygen species

SOD:

Superoxide dismutase

SDS:

Sodium dodecyl sulfate

TBA:

Thiobarbituric acid

TNF-α:

Tumor necrosis factor-alpha

UC:

Ulcerative colitis

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Acknowledgments

This study was supported by the Research project “Implication of phagocytes-dependent oxidative stress in inflammatory diseases and leishmaniasis” with project no. CNEPRU F00220130061, Algerian Ministry of Higher Education and Scientific Research.

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Authors and Affiliations

Authors

Contributions

MF, SM, AP, and BD conceived and designed the research plan. MF, HM, and BMAB conducted animal experiments. MF, SM, and AP conducted in vitro protocols. MF, HM, and BMAB analyzed the data. MF wrote the manuscript. SM, AP, and BD supervised the work and revised the manuscript. All authors read and approved the manuscript.

Corresponding authors

Correspondence to Hichem Moulahoum or Bahia Djerdjouri.

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Conflict of interest

The authors declare that they have no conflict of interest.

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Ferrat, M., Moulahoum, H., Boumaza, B.M.A. et al. Gadolinium chloride attenuates acetic acid-evoked colitis in mice by reducing neutrophil infiltration and pro-oxidative enzyme activity. Naunyn-Schmiedeberg's Arch Pharmacol 392, 299–311 (2019). https://doi.org/10.1007/s00210-018-1592-3

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  • DOI: https://doi.org/10.1007/s00210-018-1592-3

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