Jul 23, 2012 08:40AM - edited Jul 23, 2012 09:44AM by LindaF
Here is what my oncologist sent me to urge me to go and get the Zometa...sorry it is so long...
"I'm basing the benefit for zometa on:
Zoledronic acid inhibits adjuvant letrozole-induced bone loss in postmenopausal women with early breast cancer.AUBrufsky A, Harker WG, Beck JT, Carroll R, Tan-Chiu E, Seidler C, Hohneker J, Lacerna L, Petrone S, Perez EASOJ Clin Oncol. 2007;25(7):829. PURPOSE: Treatment with aromatase inhibitors decreases bone mineral density (BMD) and may increase the risk of fractures in postmenopausal women with early-stage breast cancer. The addition of zoledronic acid to adjuvant letrozole therapy may protect against bone loss.
PATIENTS AND METHODS: Patients receiving adjuvant letrozole were randomly assigned to receive either upfront or delayed-start zoledronic acid (4 mg intravenously every 6 months). The delayed group received zoledronic acid when lumbar spine (LS) or total hip (TH) T score decreased to less than -2.0 or when a nontraumatic fracture occurred. The primary end point of this study was to compare the change in LS BMD at month 12 between the groups. Secondary end points included change in TH BMD and changes in serum bone turnover markers at month 12.
RESULTS: The upfront and delayed groups each included 301 patients. At month 12, LS BMD was 4.4% higher in the upfront group than in the delayed group (95% CI, 3.7% to 5.0%; P<.0001), and TH BMD was 3.3% higher (95% CI, 2.8% to 3.8%; P<.0001). In the upfront group, mean serum N-telopeptide and bone-specific alkaline phosphatase concentrations decreased by 15.1% (P<.0001) and 8.8% (P = .0006), respectively, at month 12, whereas concentrations increased significantly in the delayed group by 19.9% (P = .013) and 24.3% (P<.0001), respectively.
CONCLUSION: With 1 year of follow-up, results of the primary end point of the Zometa-Femara Adjuvant Synergy Trial (Z-FAST) indicate that upfront zoledronic acid therapy prevents bone loss in the LS in postmenopausal women receiving adjuvant letrozole for early-stage breast cancer.
Magee-Womens Hospital, University of Pittsburgh Cancer Institute, Pittsburgh, PA 15123, USA. firstname.lastname@example.orgPMID17159193 51 TIEffective inhibition of aromatase inhibitor-associated bone loss by zoledronic acid in postmenopausal women with early breast cancer receiving adjuvant letrozole: ZO-FAST Study results.AUBundred NJ, Campbell ID, Davidson N, DeBoer RH, Eidtmann H, Monnier A, Neven P, von Minckwitz G, Miller JC, Schenk NL, Coleman RESOCancer. 2008;112(5):1001. BACKGROUND: Letrozole is safe and effective in postmenopausal women with estrogen receptor-positive early breast cancer, but long-term aromatase inhibitor use may cause bone loss and increase fracture risk. This study evaluated an immediate or delayed strategy of bone protection therapy with zoledronic acid.
METHODS: A total of 1065 patients who were receiving adjuvant letrozole were randomized to immediate-start or delayed-start zoledronic acid (4 mg intravenously biannually for 5 years). The delayed group received zoledronic acid if lumbar spine or total hip T-score decreased below -2.0 or when a nontraumatic fracture occurred. The primary endpoint was change in lumbar spine bone mineral density (BMD) at Month 12. Secondary endpoints included changes in total hip BMD, serum bone turnover markers, and safety at Month 12.
RESULTS: Lumbar spine BMD increased from baseline in the immediate arm, while it decreased from baseline indelayed-arm patients. At Month 12, the differences between the groups in lumbar spine and total hip BMD were 5.7% (P<.0001; 95% confidence intervals [CI], 5.2% to 6.1%), and 3.6% (P<.0001; 95% CI, 3.3 to 4.0%), respectively. Both regimens were well tolerated with few serious adverse events. Bone pain was higher in the immediate group, as expected, because some patients experienced acute-phase reactions after zoledronic acid infusion.
CONCLUSIONS: At 12 months, immediate zoledronic acid therapy prevented bone loss in postmenopausal women who were receiving adjuvant letrozole."
So that was what he was looking at, I guess. Hope this helps. But on second look, I don't see anything here about cancer-protective, so I guess I don't know what studies he was basing that on. Sorry!