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2016 ; 77
(5
): 973-7
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Phase I dose escalation study of temsirolimus in combination with metformin in
patients with advanced/refractory cancers
#MMPMID27014780
Khawaja MR
; Nick AM
; Madhusudanannair V
; Fu S
; Hong D
; McQuinn LM
; Ng CS
; Piha-Paul SA
; Janku F
; Subbiah V
; Tsimberidou A
; Karp D
; Meric-Bernstam F
; Lu KH
; Naing A
Cancer Chemother Pharmacol
2016[May]; 77
(5
): 973-7
PMID27014780
show ga
PURPOSE: Mammalian target of rapamycin (mTOR) inhibitors like temsirolimus may
result in undesirable AKT upregulation. Metformin inhibits mTOR through different
mechanisms and may enhance temsirolimus's antitumor activity. We conducted an
open-label phase I dose escalation trial of this drug combination in patients
with advanced/refractory cancers. METHODS: Temsirolimus, 25 mg weekly, was
combined with an escalating daily dose of metformin (level 1: 500; level 2: 1000;
level 3: 1500; level 4: 2000 mg) by utilizing a standard 3 + 3 trial design.
Treatment was administered in 28-day cycles following initial 2-week metformin
titration during the first cycle. RESULTS: Twenty-one patients (median age,
56 years) with sarcoma (n = 8), colorectal (n = 3), endometrial (n = 4), uterine
carcinosarcoma (n = 2), ovarian (n = 2), and other (n = 2) cancers were enrolled.
Patients had received median of four prior systemic treatments. Two dose-limiting
toxicities were observed (grade 3 mucositis, grade 3 renal failure); both
patients continued treatment after dose modification. Fifty-six percent patients
had stable disease as best response; clinical benefit rate was 22 %. Patients
continued treatment for median of 11 weeks. CONCLUSIONS: Combination
temsirolimus/metformin was well tolerated with modestly promising effectiveness
among this heavily pretreated patient cohort. We recommend a dose of temsirolimus
25 mg weekly and metformin 2000 mg daily for phase II study.
|Adolescent
[MESH]
|Adult
[MESH]
|Aged
[MESH]
|Aged, 80 and over
[MESH]
|Antineoplastic Combined Chemotherapy Protocols/*administration & dosage/adverse
effects/therapeutic use
[MESH]
|Dose-Response Relationship, Drug
[MESH]
|Drug Administration Schedule
[MESH]
|Female
[MESH]
|Humans
[MESH]
|Male
[MESH]
|Maximum Tolerated Dose
[MESH]
|Metformin/*administration & dosage/adverse effects/therapeutic use
[MESH]
|Middle Aged
[MESH]
|Neoplasms/*drug therapy
[MESH]
|Response Evaluation Criteria in Solid Tumors
[MESH]
|Sirolimus/administration & dosage/adverse effects/*analogs &
derivatives/therapeutic use
[MESH]