New Korean study below [1].
"Overall, 30%, 44%, 13%, and 13% of patients received docetaxel rechallenge as either the third, fourth, fifth, or sixth-line therapy, respectively, at a median of 23.6 months after stopping first-line docetaxel.
"With first-line docetaxel and rechallenge, median treatment duration was 6.4 and 3.3 months, respectively.
"With docetaxel rechallenge, PSA response was 35% ... and median PFS {progression-free survival} was 4.5 months ...
"The median OS {overall survival} was 24.3 months ..."
-Patrick
[1] pubmed.ncbi.nlm.nih.gov/329...
Investig Clin Urol
. 2020 Sep 8. doi: 10.4111/icu.20200214. Online ahead of print.
Docetaxel rechallenge in metastatic castration-resistant prostate cancer: A retrospective, single-center study
Seonggyu Byeon 1 2 , Hyera Kim 1 , Jinchul Kim 1 , Minsuk Kwon 1 , Joon Young Hur 1 , Hwang Gyun Jeon 3 , Seong Soo Jeon 3 , Hyun Moo Lee 3 , Se Hoon Park 4
Affiliations expand
PMID: 32985144 DOI: 10.4111/icu.20200214
Free article
Abstract
Purpose: To assess the efficacy and safety of docetaxel rechallenge in the salvage setting in metastatic castration-resistant prostate cancer (mCRPC) patients.
Materials and methods: Clinicopathologic data from patients treated with docetaxel rechallenge were collected from a single-center cancer registry. Among 227 patients who received first-line docetaxel for mCRPC between January 2011 and June 2019, 23 undergo rechallenge docetaxel after failure to androgen receptor targeting agents and/or cabazitaxel treatment. Endpoints included radiologic progression-free survival (PFS), treatment duration, and prostate-specific antigen (PSA) response and safety.
Results: Overall, 30%, 44%, 13%, and 13% of patients received docetaxel rechallenge as either the third, fourth, fifth, or sixth-line therapy, respectively, at a median of 23.6 months after stopping first-line docetaxel. With first-line docetaxel and rechallenge, median treatment duration was 6.4 and 3.3 months, respectively. With docetaxel rechallenge, PSA response was 35% (95% confidence interval [CI], 15% to 54%) and median PFS was 4.5 months (95% CI, 1.9 to 7.1 months). The median OS was 24.3 months (95% CI, 4.6 to 44.0 months). There were 7 severe adverse events (grade 3 or more) including anemia (8.7%), neutropenia, thrombocytopenia, leukopenia, diarrhea, and nausea (4.3% each).
Conclusions: Docetaxel rechallenge showed meaningful anti-tumor activity with acceptable toxicity in heavily pretreated patients with mCRPC.
Keywords: Chemotherapy; Docetaxel; Prostate cancer.
© The Korean Urological Association, 2020.