Glycoconjugate Journal

, Volume 30, Issue 7, pp 667–676

Impact of salt exposure on N-acetylgalactosamine-4-sulfatase (arylsulfatase B) activity, glycosaminoglycans, kininogen, and bradykinin

  • Kumar Kotlo
  • Sumit Bhattacharyya
  • Bo Yang
  • Leonid Feferman
  • Shah Tejaskumar
  • Robert Linhardt
  • Robert Danziger
  • Joanne K. Tobacman
Article

DOI: 10.1007/s10719-013-9468-8

Cite this article as:
Kotlo, K., Bhattacharyya, S., Yang, B. et al. Glycoconj J (2013) 30: 667. doi:10.1007/s10719-013-9468-8

Abstract

N-acetylgalactosamine-4-sulfatase (Arylsulfatase B; ARSB) is the enzyme that removes sulfate groups from the N-acetylgalactosamine-4-sulfate residue at the non-reducing end of chondroitin-4-sulfate (C4S) and dermatan sulfate (DS). Previous studies demonstrated reduction in cell-bound high molecular weight kininogen in normal rat kidney (NRK) epithelial cells when chondroitin-4-sulfate content was reduced following overexpression of ARSB activity, and chondroitinase ABC produced similar decline in cell-bound kininogen. Reduction in the cell-bound kininogen was associated with increase in secreted bradykinin. In this report, we extend the in vitro findings to in vivo models, and present findings in Dahl salt-sensitive (SS) rats exposed to high (SSH) and low salt (SSL) diets. In the renal tissue of the SSH rats, ARSB activity was significantly less than in the SSL rats, and chondroitin-4-sulfate and total sulfated glycosaminoglycan content were significantly greater. Disaccharide analysis confirmed marked increase in C4S disaccharides in the renal tissue of the SSH rats. In contrast, unsulfated, hyaluronan-derived disaccharides were increased in the rats on the low salt diet. In the SSH rats, with lower ARSB activity and higher C4S levels, cell-bound, high-molecular weight kininogen was greater and urinary bradykinin was lower. ARSB activity in renal tissue and NRK cells declined when exogenous chloride concentration was increased in vitro. The impact of high chloride exposure in vivo on ARSB, chondroitin-4-sulfation, and C4S-kininogen binding provides a mechanism that links dietary salt intake with bradykinin secretion and may be a factor in blood pressure regulation.

Keywords

BradykininChondroitinDisaccharideKininogenSulfataseSulfate

Copyright information

© Springer Science+Business Media New York (outside the USA) 2013

Authors and Affiliations

  • Kumar Kotlo
    • 1
    • 2
  • Sumit Bhattacharyya
    • 1
    • 2
  • Bo Yang
    • 4
  • Leonid Feferman
    • 1
    • 2
  • Shah Tejaskumar
    • 3
  • Robert Linhardt
    • 4
  • Robert Danziger
    • 1
    • 2
  • Joanne K. Tobacman
    • 1
    • 2
    • 5
  1. 1.University of Illinois at ChicagoChicagoUSA
  2. 2.Jesse Brown VA Medical CenterChicagoUSA
  3. 3.Rosalind Franklin University of Medicine and ScienceNorth ChicagoUSA
  4. 4.Rensselaer Polytechnic UniversityTroyUSA
  5. 5.Department of MedicineUniversity of Illinois at ChicagoChicagoUSA