1. Vandenbogaerde A, Kamuhabwa A, Delaey E, Himpens B, Merlevede W and de Witte P (1998) Photocytotoxic effects of pseudohypericin versus hypericin. J Photochem Photobiol B Biol 45: 87-94.

2. Kamuhabwa A, Augustijns P and de Witte P (1999) In vitro transport and uptake of protohypericin and hypericin in the Caco-2 model. Int J Pharm 188: 81-86.

3. Delaey E, Kamuhabwa A, Vandenbogaerde A and de Witte P (1999) Photocytotoxicity of protohypericin after photoconversion to hypericin. Planta Medica 65: 719-722.

4. Kamuhabwa A, Roelandts H and de Witte P (1999) Skin photosensitization with topical hypericin in hairless mice. J Photochem Photobiol B Biol 53: 110-114.

5. Kamuhabwa A, Geboes K and de Witte P (2000) Investigation of the absorption of hypericin into the skin of hairless mice. J Pharm Pharmacol 52: 1-9.

6. Kamuhabwa A, Nshimo C and de Witte P (2000) Cytotoxicity of some Tanzanian plant extracts used in Tanzanian traditional medicine. J Ethnopharmacol 70: 143-149.

7. Vandenbogaerde A, Zanoli P, Puia G, Truzzi C, Kamuhabwa A, de Witte P, Merlevede W and Baraldi M (2000) Effects of Hypericum perforatum extract in locomotoric and anxiolytic animal tests. Pharmacol Biochem Behavior 65: 627-633.

8. Delaey E, van Laar A, De Vos F, Kamuhabwa A, Jacobs D and de Witte P (2000) A comparative study of the photosensitizing properties of some cyanines. J Photochem Photobiol B Biol 55: 27-36.

9. Kamuhabwa A, Agostinis P, D'Hallewin M, Kasran A and de Witte P (2000) Photodynamic activity of hypericin in human urinary bladder carcinoma cells. Anticancer Res 20: 2579-2584.

10. Zupkó I, Kamuhabwa A, D'Hallewin M, Baert L and de Witte P (2001) In vivo photodynamic therapy of hypericin in transitional cell carcinoma bladder tumors. Int J Oncol 18: 1099-1105.

11. Kamuhabwa A, Agostinis P, D'Hallewin M, Baert L and de Witte P (2001) Cellular photodestruction induced by hypericin in AY-27 rat bladder carcinoma cells. Photochem Photobiol 74: 126-132.

12. Kamuhabwa A, Cosserat-Gerardin I, Didelon J, Notter D, Guillemin F, Roskams T, D'Hallewin M, Baert L and de Witte P (2002) Biodistribution of hypericin in orthotopic transitional cell carcinoma bladder tumors: implication for whole bladder wall photodynamic therapy. Int J Cancer 97: 253-260.

13. D'Hallewin M, Kamuhabwa A, Roskams T, de Witte P and Baert L (2002) Hypericin-based fluorescence diagnosis of bladder carcinoma. BJU Int 89: 760-763.

14. Nshimo CM, Kamuhabwa A and de Witte P (2001) Antiproliferative effect of plant extracts used in Tanzanian Tradition medicine. East Central African J Pharm Sci 4: 36-38.

15. Deferme S, Van Gelder J, Kamuhabwa A, Nshimo C, de Witte P, Van den Mooter G and Augustijns P (2003) Screening of Tanzanian plant extracts of their potential inhibitory effect on p-glycoprotein mediated efflux. Phytother Res 17: 459-464.

16. Kamuhabwa A, Roskams T, Baert L and de Witte PA (2003) Microscopic quantification of hypericin fluorescence in an orthotopic rat bladder tumor model after intravesical instillation. Int J Oncol 22:933-937.

17. Kamuhabwa A, Roskams T, D'Hallewin M, Baert L, Van Poppel H and de Witte P (2003) Whole bladder wall photodynamic therapy of orthotopic transitional cell carcinoma bladder tumors using intravesically administered hypericin. Int J Cancer 107:460-467.

18. Kamuhabwa A, Huygens A and de Witte P (2003) Photodynamic therapy of transitional cell carcinoma multicellular tumor spheroids with hypericin. Int J Oncol 23:1445-1450.

19. Huygens A, Bormans G, Verbruggen A, Kamuhabwa A, Roskams T and de Witte P (2003) Accumulation and photocytotoxicity of hypericin and analogs in two and three-dimensional cultures of transitional cell carcinoma cells. Photochem Photobiol 78: 607-614

20. Kamuhabwa A, Agostinis P, Ahmed B, Landuy W, Van Cleynenbreugel B, Van Poppel H and de Witte P (2004) Hypericin as a potential phototherapeutic agent in superficial bladder cell carcinoma. Photochem Photobiol Sci 3: 772-780.

21. Owusu M, Kamuhabwa A, Nshimo C, Van Boven M and de Witte P (2004) .Investigation of fractions present in the stem bark of Annickia kummeriae on their P-glycoprotein inhibitory pump activity. Phytother Res 18: 652-657.