o(6)-benzylguanine and Cutaneous T-Cell Lymphoma studies

O(6)-benzylguanine: a suicide inhibitor of O(6)-methylguanine-DNA methyltransferase activity

Research Excerpts

Excerpt	Relevance	Reference
"In a phase 1 trial, single-dose O6-benzylguanine with topical carmustine for patients with early stage (stage IA through stage IIA) cutaneous T-cell lymphoma, mycosis fungoides (MF) type, resulted in clinical responses proportional to inhibition of O6-alkylguanine-DNA alkyltransferase activity, but a maximum tolerated dose (MTD) was not reached."	9.24	Evaluation of O6-Benzylguanine-Potentiated Topical Carmustine for Mycosis Fungoides: A Phase 1-2 Clinical Trial. ( Carlson, S; Chan, DV; Cooper, KD; Dowlati, A; Fu, P; Gerson, SL; Groft, S; Honda, K; Lu, K; McCormick, TS; Rosenjack, J; Tacastacas, JD, 2017)
"In a phase 1 trial, single-dose O6-benzylguanine with topical carmustine for patients with early stage (stage IA through stage IIA) cutaneous T-cell lymphoma, mycosis fungoides (MF) type, resulted in clinical responses proportional to inhibition of O6-alkylguanine-DNA alkyltransferase activity, but a maximum tolerated dose (MTD) was not reached."	5.24	Evaluation of O6-Benzylguanine-Potentiated Topical Carmustine for Mycosis Fungoides: A Phase 1-2 Clinical Trial. ( Carlson, S; Chan, DV; Cooper, KD; Dowlati, A; Fu, P; Gerson, SL; Groft, S; Honda, K; Lu, K; McCormick, TS; Rosenjack, J; Tacastacas, JD, 2017)

Research

Studies (1)

Authors

Clinical Trials (1)

Trial Overview

Trial Outcomes

Overall Response Rate

Timeframe	Studies, this research(%)	All Research%
pre-1990	0 (0.00)	18.7374
1990's	0 (0.00)	18.2507
2000's	0 (0.00)	29.6817
2010's	1 (100.00)	24.3611
2020's	0 (0.00)	2.80

Authors	Studies
Tacastacas, JD	1
Chan, DV	1
Carlson, S	1
Gerson, SL	1
Dowlati, A	1
Fu, P	1
Lu, K	1
Groft, S	1
Rosenjack, J	1
Honda, K	1
McCormick, TS	1
Cooper, KD	1

Trial	Phase	Enrollment	Study Type	Start Date	Status
A Phase I/II Multicenter Clinical Trial of O6Benzylguanine and Topical Carmustine in the Treatment of Refractory Early-Stage (IA-IIA) Cutaneous T-Cell Lymphoma[NCT00961220]	Phase 1/Phase 2	17 participants (Actual)	Interventional	2010-02-01	Completed
[information is prepared from clinicaltrials.gov, extracted Sep-2024]

"Based on changes in modified SWAT assessment, patient responses will be classified as complete clinical response (CCR), partial response (PR), stable disease (SD), or progressive disease (PD). SWAT provides an accurate and reproducible assessment of cutaneous disease involvement based on body surface area of involvement and lesional thickness.~CCR: No evidence of disease, 100% improvement for a duration of at least 4 weeks. PR: Greater than or equal to 50% decrease in SWAT score compared to baseline and improvement is maintained for at least 4 weeks. SD: Less than 50% decrease in SWAT score compared to baseline. PD: Increase of greater or equal to 25% of the SWAT score compared to baseline while the patient is actively taking the study drug" (NCT00961220)
Timeframe: Up to 2 weeks after completion of study treatment

Intervention	participants (Number)
	Complete Clinical Response-confirmed	Complete Clinical Response-unconfirmed	Partial Response	Progressive Disease
Treatment (O6-benzylguanine, Carmustine)	6	2	8	1