Tight junctions.

نویسندگان

  • M S Balda
  • K Matter
چکیده

Tight junctions are the most apical intercellular junctions of epithelial and endothelial cells and create a regulatable semipermeable diffusion barrier between individual cells. On a cellular level, they form an intramembrane diffusion fence that restricts the intermixing of apical and basolateral membrane components. In addition to these well defined functions, more recent evidence suggests that tight junctions are also involved in basic cellular processes like the regulation of cell growth and differentiation.

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

Morphological changes in tight junctions of Necturus maculosus proximal tubules undergoing saline diuresis

Tight junctions between epithelial cells are believed to control the paracellular diffusion of substances across epithelia. Epithelia in which tight junctions are poorly developed display a higher paracellular electrical conductance, while those with extensive tight junctions show lower conductance values. We described here a particular epithelium, that of the proximal tubules of the Necturus k...

متن کامل

Variations in Tight and Gap Junctions in Mammalian Tissues

The fine structure and distribution of tight (zonula occludens) and gap junctions in epithelia of the rat pancreas, liver, adrenal cortex, epididymis, and duodenum, and in smooth muscle were examined in paraformaldehyde-glutaraldehyde-fixed, tracer-permeated (K-pyroantimonate and lanthanum), and freeze-fractured tissue preparations. While many pentalaminar and septilaminar foci seen in thin-sec...

متن کامل

ارتباط بیان ژن اوکلودین با مشخصات بالینی و مورفولوژیک سرطان پستان

Background: Breast cancer is the second most common cancer in the world after lung cancer also is the fifth cause of cancer mortality. About 90 percent of cancer mortality is because of metastasis and devastating between cell attachments, especially tight cell junctions. Epithelial mesenchymal transition is a phenomena involved in metastasis and starts with cell detachment. Occludin is the inte...

متن کامل

Na-K-ATPase regulates tight junction permeability through occludin phosphorylation in pancreatic epithelial cells.

Tight junctions are crucial for maintaining the polarity and vectorial transport functions of epithelial cells. We and others have shown that Na-K-ATPase plays a key role in the organization and permeability of tight junctions in mammalian cells and analogous septate junctions in Drosophila. However, the mechanism by which Na-K-ATPase modulates tight junctions is not known. In this study, using...

متن کامل

Differential pathways of claudin oligomerization and integration into tight junctions

Tight junctions are the critical intercellular structure required to establish an epithelial barrier. Among the several classes of proteins required to form tight junctions are the tetraspan transmembrane proteins known as claudins that directly determine paracellular permeability. Considerable progress has been made in understanding how incorporation of different claudins into tight junctions ...

متن کامل

Permeability of Sertoli Cell Tight Junctions to Lanthanum after Ligation of Ductus Deferens and Ductuli Efferentes

The permeability of Sertoli cell tight junctions to lanthanum administered during fixation has been compared in rats after ligation of the ductus deferens and after ligation of the ductuli efferentes. In both control and vasoligated testes, lanthanum penetrated only short distances into the Sertoli cell tight junctions before stopping abruptly. The tight junction, consisting of numerous pentala...

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:
  • Journal of cell science

دوره 111 ( Pt 5)  شماره 

صفحات  -

تاریخ انتشار 1998