Differential glycosaminoglycan expression and hyaluronan homeostasis in juvenile hyaline fibromatosis.
BACKGROUND
Juvenile hyaline fibromatosis (JHF) is a rare autosomal recessive disease characterized histologically by deposition of hyaline material and clinically by multiple skin lesions. Clarification of the molecular and structural changes involved in JHF skin lesions may unravel targets for pharmacotherapy.


OBJECTIVE
We sought to investigate the expression of glycosaminoglycans and their metabolizing enzymes in lesional as compared with lesion-free skin tissue specimens in JHF.


METHODS
Glycosaminoglycans were isolated, purified, and fractionated by electrophoresis on cellulose acetate membranes and agarose gels. Hyaluronic acid (HA) was quantitated by enzyme-linked immunosorbent assay and the expression of HA metabolizing enzymes was investigated using reverse transcriptase-polypeptide chain reaction.


RESULTS
JHF lesions exhibited significantly less HA and elevated amounts of dermatan sulfate and chondroitin sulfate, whereas gene expression of HA synthase-1 and HA synthase-3 was significantly down-regulated, as compared with lesion-free skin tissue specimens.


CONCLUSIONS
Because JHF is a rare disease, a limitation to our study was that we collected skin tissue specimens from only one patient.


CONCLUSIONS
The significant alterations of HA homeostasis in JHF lesions provide further understanding of JHF pathogenesis and may offer a target for pharmacologic intervention to treat the skin lesions associated with JHF.
Tzellos
Thrasivoulos G
TG
Second Department of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Dionyssopoulos
Alexander
A
Klagas
Ioannis
I
Karakiulakis
George
G
Lazaridis
Lambis
L
Papakonstantinou
Eleni
E
D001706:Biopsy; D002648:Child; D002809:Chondroitin Sulfates / Q000378:metabolism*; D003871:Dermatan Sulfate / Q000378:metabolism*; D015536:Down-Regulation / Q000502:physiology; D004587:Electrophoresis, Agar Gel; D016326:Extracellular Matrix Proteins / Q000235:genetics; D005260:Female; D005350:Fibroma / Q000378:metabolism* / Q000473:pathology; D014453:Glucuronosyltransferase / Q000235:genetics; D006706:Homeostasis / Q000502:physiology*; D006801:Humans; D018960:Hyaluronan Receptors / Q000235:genetics; D000076002:Hyaluronan Synthases; D006820:Hyaluronic Acid / Q000378:metabolism*; D012867:Skin / Q000378:metabolism / Q000473:pathology; D012878:Skin Neoplasms / Q000378:metabolism* / Q000473:pathology
C497483:CD44 protein, human; D016326:Extracellular Matrix Proteins; D018960:Hyaluronan Receptors; C098946:hyaluronan-mediated motility receptor; D003871:Dermatan Sulfate; D006820:Hyaluronic Acid; D002809:Chondroitin Sulfates; D014453:Glucuronosyltransferase; D000076002:Hyaluronan Synthases