Rare Diseases Symptoms Automatic Extraction

Integrin beta4 regulates migratory behavior of keratinocytes by determining laminin-332 organization.

[junctional epidermolysis bullosa]

Whether alpha6beta4 integrin regulates migration remains controversial. beta4 integrin-deficient (JEB) keratinocytes display aberrant migration in that they move in circles, a behavior that mirrors the circular arrays of laminin (LM)-332 in their matrix. In contrast, wild-type keratinocytes and JEB keratinocytes, induced to express beta4 integrin, assemble laminin-332 in linear tracks over which they migrate. Moreover, laminin-332-dependent migration of JEB keratinocytes along linear tracks is restored when cells are plated on wild-type keratinocyte matrix, whereas wild-type keratinocytes show rotation over circular arrays of laminn-332 in JEB keratinocyte matrix. The activities of Rac1 and the actin cytoskeleton-severing protein cofilin are low in JEB keratinocytes compared with wild-type cells but are rescued following expression of wild-type beta4 integrin in JEB cells. Additionally, in wild-type keratinocytes Rac1 is complexed with alpha6beta4 integrin. Moreover, Rac1 or cofilin inactivation induces wild-type keratinocytes to move in circles over rings of laminin-332 in their matrix. Together these data indicate that laminin-332 matrix organization is determined by the alpha6beta4 integrin/actin cytoskeleton via Rac1/cofilin signaling. Furthermore, our results imply that the organizational state of laminin-332 is a key determinant of the motility behavior of keratinocytes, an essential element of skin wound healing and the successful invasion of epidermal-derived tumor cells.

Diseases presenting "tumor cells" symptom

  • alpha-thalassemia
  • carcinoma of the gallbladder
  • cholangiocarcinoma
  • cushing syndrome
  • dedifferentiated liposarcoma
  • dentin dysplasia
  • esophageal adenocarcinoma
  • esophageal carcinoma
  • esophageal squamous cell carcinoma
  • hodgkin lymphoma, classical
  • junctional epidermolysis bullosa
  • kindler syndrome
  • liposarcoma
  • lymphangioleiomyomatosis
  • pleomorphic liposarcoma
  • primary effusion lymphoma
  • severe combined immunodeficiency
  • triple a syndrome
  • von hippel-lindau disease
  • waldenström macroglobulinemia
  • well-differentiated liposarcoma
  • werner syndrome
  • wiskott-aldrich syndrome

You can validate or delete this automatically detected symptom