Comparison of Two Doses of
lnterferon-Alpha-2b in
Intravesical Prophylaxis of
Superficial Bladder Tumors

Silva, Fernando Calais da; Furtado, L; Reis, Mário; Carreira, Fernando; Dias, V.; Oliveira, Gomes de

doi:10.1159/000475069

Cited by 4 publications

(8 citation statements)

References 7 publications

(10 reference statements)

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“…The recurrence rate for the dose of 10 mg of mitoxantrone is comparable with the 36.3% recorded by Sharifi et al [13] and the 37% reported by Yaman et al [14], while for the dose of 20 mg of mitoxantrone it is comparable with the 35.5% recorded by Namasivayam et al [15]. The recurrence rate for the dose of 100 MU of IFN·-2b is comparable with the 33.3% reported by Da Silva et al [12], while the observed difference can be attributed to the longer follow-up (33.3 months) of the latter study.…”

Section: Discussionsupporting

confidence: 83%

“…These results confirm the inability of intravesical mitoxantrone and IFN·-2b to control tumor progression and invasion [11][12][13][14][15][16], as demonstrated for all chemotherapeutics and most immunomodulating drugs, except for BCG [2,3,17]. Namasivayam et al [15] reported tumor progression in 19.04% of the patients, with only four instillations of 20 mg of mitoxantrone, while Da Silva et al [12] reported a tumor progression of 12.69% with 100 MU of IFN·-2b. Giannakopoulos et al [11] instilled 80 MU of IFN·-2b and recorded tumor progression in 4.34% of the patients, concluding that IFN·-2b can modify the clinical course of superficial bladder cancer in the short term, while Kostakopoulos et al [18] reported a progression rate of 13.33% with the instillation of 10 MU of IFN·-2b.…”

Section: Discussionsupporting

confidence: 67%

“…Mitoxantrone was instilled in the doses of 10 and 20 mg, which are usually used (no comparative study between them has been published). The dosage schedule of 100 MU of IFN·-2b was chosen according to studies showing that higher doses are more effective, while side effects are practically absent [11,12].…”

Section: Discussionmentioning

confidence: 99%

“…0.05) shorter between the mitoxantrone groups and the IFN·-2b group. Stewart et al [16] Papatsoris/Deliveliotis/Giannopoulos/ Dimopoulos reported a mean recurrence time of 6 months with 10 mg of mitoxantrone, which was instilled for only 6 weeks, while Da Silva et al [12] recorded a mean recurrence period of 28.6 months with 100 MU of IFN·-2b (with a longer follow-up). Furthermore, both mitoxantrone and IFN·-2b prolonged statistically significantly (p !…”

Section: Discussionmentioning

confidence: 99%

“…It has been documented that the side effects of mitoxantrone are in proportion with the dose, the bladder retention time, and the dosage intervals [13,15,16,19]. On the contrary, it has been documented that IFN·-2b toxicity is minor, regardless of the instilled dose [11,12]. This tolerance is advantageous because IFN·-2b can be used in combination therapy to lower other drug doses, such as BCG [21].…”

Section: Discussionmentioning

confidence: 99%

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Adjuvant Intravesical Mitoxantrone versus Recombinant Interferon-α after Transurethral Resection of Superficial Bladder Cancer: A Randomized Prospective Study

et al. 2004

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Objective: To determine the efficacy and safety of two different doses of intravesical mitoxantrone and of recombinant interferon-α (IFNα-2b), instilled after transurethral resection (TUR) of superficial transitional cell carcinoma (TCC) of the bladder. Material and Methods: 208 patients (mean age 62.05 years) with primary or recurrent superficial (TaG1, T1G1, T1G2) bladder cancer were randomly allocated into four groups, after TUR of all visible tumors. Group A (45 patients) received no further therapy; group B (56 patients) received 10 mg of mitoxantrone (6 weekly and 20 fortnightly instillations), group C (54 patients) 20 mg of mitoxantrone (3 fortnightly and 10 monthly instillations) and group D (53 patients) received 100 MU of IFNα-2b (8 weekly, 8 fortnightly and 6 monthly instillations). Results: During the follow-up (mean 21.09 months), 29 (64.44%) patients in group A had recurrence, compared with 19 (33.92%) in group B, 17 (31.48%) in group C and 15 (28.3%) patients in group D (p < 0.005). Furthermore, the differences in simple recurrence rates were statistically more significant (p < 0.05), when group A was compared with the three other groups in the terms of T1G2, recurrent and multiple neoplasms. Twenty-nine patients (10, 7, 8, and 4 in groups A–D) experienced tumor progression, and the differences between the four groups were not statistically significant (p > 0.05). The mean recurrence time was 9.03 months in group A, 13.74 in group B, 14.24 in group C and 17.4 months in group D (p < 0.001), and the recurrence rate per 100 patient-months was 4.39, 1.57, 1.48 and 1.06, respectively (p < 0.05). Toxicity (grade 1–3) was recorded in 23.21% in group B, in 31.48% in group C and in 9.43% in group D (p < 0.01). Conclusion: The two doses of mitoxantrone resulted in similar efficacy for the prevention of superficial bladder cancer recurrences, with the dose of 10 mg of mitoxantrone being related to fewer side effects. In comparison with mitoxantrone, the adjuvant intravesical immunotherapy with 100 MU of IFNα-2b showed a better combination of efficacy and safety.

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