The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Achilles tendinosis is associated with sprouting of substance P positive nerve fibres.

OBJECTIVES: To identify and characterise nerve fibres and inflammatory alterations in painful Achilles tendinosis and thus gain evidence about the origin of pain in Achilles tendinosis. METHODS: The composition of 10 tendon samples from patients with a prior history of painful Achilles tendinosis and 10 samples from patients with spontaneously ruptured tendons but no previous pain was compared by immunohistochemistry and conventional histology. RESULTS: The presence of granulation tissue was shown in 8/10 cases of Achilles tendinosis. Nociceptive substance P ( SP) positive nerve fibres were significantly increased, and an inflammatory infiltration comprising B and T lymphocytes was found. Additionally, small foci with iron positive haemosiderophages, indicating prior microtraumatic events, were found in 6/10 samples. None of the spontaneously ruptured tendons contained granulation tissue or haemosiderophages. Inflammatory infiltration in these patients consisted almost exclusively of granulocytes and SP positive nerve fibres were decreased. The density of sympathetic nerve fibres did not differ in the two conditions. CONCLUSION: Achilles tendinosis is associated with the presence of granulation tissue, haemosiderophages, and SP positive nerve fibres, which may transmit the clinically pertinent pain. Achilles tendinosis may be caused by repeated microtraumata with ensuing organisation that is accompanied by sprouting of nociceptive SP positive nerve fibres.[1]


  1. Achilles tendinosis is associated with sprouting of substance P positive nerve fibres. Schubert, T.E., Weidler, C., Lerch, K., Hofstädter, F., Straub, R.H. Ann. Rheum. Dis. (2005) [Pubmed]
WikiGenes - Universities