3 Biotech

, 9:1 | Cite as

Characterization of a new exopolysaccharide produced by Halorubrum sp. TBZ112 and evaluation of its anti-proliferative effect on gastric cancer cells

  • Masoud Hamidi
  • Rasool Mirzaei
  • Cédric Delattre
  • Korosh KhanakiEmail author
  • Guillaume Pierre
  • Christine Gardarin
  • Emmanuel Petit
  • Fatemeh Karimitabar
  • Sobhan Faezi
Original Article


In the present study, we aimed to extract, purify, analyze monosaccharide composition of  exopolysaccharide (EPS) produced by Halorubrum sp. TBZ112 (KCTC 4203 and IBRC-M 10773) and also to evaluate its possible antiproliferative activity against human gastric cancer (MKN-45) cell line and its biocompatibility effect on normal cells using human dermal fibroblast (HDF) cell line. Average molecular weight and monosaccharide composition were determined by high-pressure size exclusion chromatography (HPSEC) with multi-angle laser light scattering (MALLS) and high-pressure anion exchange chromatography (HPAEC), respectively. Fourier transform infrared (FTIR) spectroscopy was used for the partial characterization of the EPS. The EPS effect on the cell proliferation and viability of MKN-45 and HDF cells was assessed using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and trypan blue dye exclusion, respectively. Strain TBZ112 excreted 480 mg.l−1 of the EPS under optimal growth conditions. The EPS had a molecular weight of 5.052 kDa and was a heteropolysaccharide containing ten moieties mainly composed of mannose (19.95%), glucosamine (15.55%), galacturonic acid (15.43%), arabinose (12.24%), and glucuronic acid (12.05%). No significant difference of the EPS treatments on the proliferation activity of MKN-45 and HDF cells were observed (P > 0.05). For the first time, the EPS from Halorubrum sp. TBZ112, an extremely halophilic archaeon related to Halorubrum genus, was isolated and chemically characterized. The EPS from Halorubrum sp. TBZ112 possesses a relatively low molecular weight and might be applied as a biocompatible compound. More investigations are needed to determine other biological activities of the EPS along with further details of its chemical structure.


Exopolysaccharide (EPS) Halorubrum sp. TBZ112 Monosaccharide composition Antiproliferative effect 



This research was performed as an MSc thesis (Number 13) at School of Paramedicene, Guilan University of Medical Sciences (Rasht, Iran). This work was financially supported by the Research Deputy of Guilan University of Medical Sciences (Rasht, Iran).

Author Contributions

MH designed the research. RM, GP, CG, EP, and SF performed the research. M.H., RM, CD, KK, and FK wrote the paper. MH, CD, and KK performed analysis and interpretation of data. All authors discussed the results and participated in the manuscript revision.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Medical Biotechnology Research Center, School of ParamedicineGuilan University of Medical SciencesRashtIran
  2. 2.Institut Pascal UMR CNRS 6602Université Clermont AuvergneClermont-FerrandFrance
  3. 3.EA3900 BIOPIUniversité de Picardie Jules VerneAmiens cedexFrance

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