List of publications This thesis is based on the following papers, which will be referred to by their roman numerals throughout the text: I. Bletsa A, Heyeraas KJ, Haug SR, Berggreen E (2004): “ IL-1α and TNF-α expression in rat periapical lesions and dental pulp after unilateral sympathectomy”, Neuroimmunomodulation 11: 376-384. II. Bletsa A, Nedrebø T, Heyeraas KJ, Berggreen E (2006): “Edema in Oral Mucosa after LPS or Cytokine Exposure”, Journal of Dental Research 85(5): 442-446. III. Bletsa A, Berggreen E, Fristad I, Tenstad O, Wiig H (2006): “Cytokine signalling in rat pulp interstitial fluid and transcapillary fluid exchange during LPS-induced acute inflammation”, Journal of Physiology 573: 225- 236. IV. Bletsa A, Berggreen E, Brudvik P: “IL-1α and TNF-α expression during early phases of experimental orthodontic tooth movement”, European Journal of Oral Sciences In press.