Clogging of the glomerular basement membrane

نویسندگان

  • Y S Kanwar
  • L J Rosenzweig
چکیده

The negative charges of the sulfated glycosaminoglycans (GAGs) of the glomerular basement membrane (GBM) were differentially neutralized by perfusin with high molarity buffers in order to determine whether or not these charges protect the GBM from being clogged by circulating plasma macromolecules. Progressive elimination of the negative charges resulted in clogging of the GBM by perfused native ferritin (NF) and bovine serum albumin as evidenced ultrastructurally by the increase in accumulation of NF in the GBM. In addition, the permeability of the GBM to 125I-insulin, a macromolecule which is normally freely permeable, and the glomerular filtration rate (as determined by [3H]inulin clearance) were markedly reduced after the GBM had been clogged with NF in the presence of high molarity buffer, thereby indicating that clogging severely reduces the ability of the GMB to act as a selective filter. These findings are consistent with the idea that the sulfated GAGs of the GBM serve as anticlogging agents.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

بررسی اثرات مزمن کلرید آلومینیوم بر فراساختمان غشای پایه گلومرولی، مورفولوژی و مورفومتری بافت‌های کلیوی خرگوش

   Background & Aims: Aluminum has many harmful effects on biochemical and physiological structures even behavioral disorders. Materials & Methods: The rabbits were classified into treatment and control groups. 12.5mg/kg aluminum chloride was injected to treatment group animals and simultaneously the same dose of deionized water to control group animals in anesthesia state for 7 weeks, intraper...

متن کامل

Removal of heparan sulfate from the glomerular basement membrane blocks protein passage.

Heparan sulfate (HS) within the glomerular basement membrane (GBM) is thought to play a major role in the charge-selective properties of the glomerular capillary wall. Recent data, however, raise questions regarding the direct role of HS in glomerular filtration. For example, in situ studies suggest that HS may prevent plasma macromolecules from clogging the GBM, keeping it in an "open" state. ...

متن کامل

Alport’s Syndrome: Ultra-structural Study of 26 Suspected Cases

Introduction and Objective: Alport’s syndrome (hereditary nephritis with deafness) is a familial uncommon disease that ultra-structural studies are gold standard method of its diagnosis. Materials and Methods:We studied 26 Iranian patients suspicious of Alport’s syndrome by electron microscopy. We examin...

متن کامل

Glomerular permeability to macromolecules in the Necturus kidney.

Many aspects of the glomerular filtration of macromolecules remain controversial, including the location of the major filtration barrier, the effects of electrical charge, and the reason the filtration barrier does not clog. We examined these issues in anesthetized Necturus maculosus, using fluorescently labeled probes and a two-photon microscope. With the high resolution of this system and the...

متن کامل

Anti-Glomerular Basement Membrane Disease Accompanied by Membrano Proliferative Glomerulonephritis: A Case Report

Anti-glomerular basement membrane disease is characterized by autoimmunity to antigenic sites on type IV collagen of the glomerular basement membrane. The majority of patients present with rapidly progressive glomerulonephritis and alveolar hemorrhage. The occurrence of antiglomerular basement membrane disease and other types of glomerulonephritis, such as membranous nephropathy, IgA nephropath...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The Journal of Cell Biology

دوره 93  شماره 

صفحات  -

تاریخ انتشار 1982