Chemotherapeutic Agents in Brain/Breast

• Concentration of drug [ Time Frame: Post-Op Per Sample Collection ] [ Designated as safety issue: No ]

  Serum/plasma concentrations: measured for all agents except trastuzumab by HPLC or LC-MS/MS. Trastuzumab concentrations measured by enzyme linked immunosorbent assay. Compared to tissue levels and the extent of change in serum/plasma during the surgical process will be noted.

  Tissue Concentrations: determined by HPLC/LC-MS/MS or by ELISA. The objective would be to compare tumor concentration to brain adjacent to tumor, which often has an intact BBB. The degree of BBB compromise in the specimens will be assessed through analysis of serum protein levels and hemoglobin.

  
  

Drug: capecitabine
Capecitabine is an oral prodrug of 5 deoxy-5-fluorouridine (5DFRU) that is converted to 5-fluorouracil (5-FU). 5-FU is metabolized to 5-fluoro-2-deoxyuridine monophosphate (fDUMP) and 5-fluorouridine triphosphage (FUTP) which cause cell injury. Capecitabine is supplied in 150 mg (light peach colored) and 500 mg tablets (film coated)and will be administered pre-operatively.
Other Name: Capecitabine (Xeloda®) (NSC-712807)
Drug: cyclophosphamide
Cyclophosphamide is biotransformed principally in the liver to active alkylating metabolites that cross-link tumor cell DNA. Cyclophosphamide is supplied in 100 mg, 200 mg, 500 mg and 1 gram and 2 gram vials as a white powder. The drug should be reconstituted with Sterile Water for Injection, USP, and may be diluted in either normal saline or D5W. Cyclophosphamide will be mixed in 250 mL of D5W and infused over 30 minutes prior to surgery.
Other Name: Cyclophosphamide (Cytoxan) (NCS-26271)
Drug: doxorubicin hydrochloride
Doxorubicin is an anthracycline anticancer agent which mediates tumoricidal effects by intercalating into double-stranded DNA and producing structural changes that disrupt DNA and RNA synthesis. Doxorubicin is supplied in 10, 20, and 50 mg single use vials, and 150 mg multidose vials as a red-orange, lyophilized power which has a storage stability of a least two years. The dose will be given 60mg/m2 over 15 minutes of time pre-operatively.
Other Name: Doxorubicin (Adriamycin) (NSC-123127)
Drug: gemcitabine hydrochloride
Gemcitabine is a fluorinated deoxynucleoside prodrug which disrupts DNA synthesis and induces apoptosis in a broad number of human tumors, including breast cancer. Gemcitabine is supplied as a lyophilized powder in sterile vials containing 200 mg of 1000 mg (1 gram) of gemcitabine as the hydrochloride salt (expressed as the free base) mannitol and sodium acetate. Dosage will be 1250mg/m2, IV pre-operatively over 30 minutes.
Other Name: Gemcitabine (Gemzar®) (NSC-613327)
Drug: lapatinib ditosylate
: Lapatinib ditosylate monohydrate tablets, 250 mg, are oval, biconvex, orange, film-coated tablets with one side of the tablet plain and other side of the tablet embossed with FG HLS. Lapatinib may also be supplied as oval, biconvex, tan tablets, with no markings. Lapatinib will be administered for at least 3 days pre-operatively at 1250mg.
Other Name: Lapatinib (Tykerb®) GW572016
Drug: paclitaxel
Paclitaxel will be given as an intravenous infusion (80mg/m2) the morning of surgery as specified in the protocol, diluted in 0.9% Sodium Chloride Injection, USP, or 5% Dextrose Injection. Paclitaxel will be administered via an infusion control device (pump) using non-PVC tubing and connectors, such as the IV administration sets (polyethylene or polyolefin) which are used to infuse parenteral nitroglycerin.
Other Name: Paclitaxel (Taxol®) (NSC-673089)
Drug: vinorelbine ditartrate
Vinorelbine (Navelbine®) is a unique semi-synthetic vinca alkaloid 3', 4-didehydro-4' deoxy-C'-norvincaleukoblastine (ditartrate) (IUPAC). The pyogen free, sterile parenteral dosage form is supplied in 10 mg/1 ml ampules/vials and 50 mg/5 ml vials. It will be administered at a dosage of 25mg/m2 IV over 10-30 minutes pre-operatively.
Other Name: Vinorelbine (Navelbine®) (INSC-608210)
Drug: Trastuzumab
Trastuzumab is a monoclonal immunoglobulin G1 kappa antibody which acts as a mediator of antibody-dependent cellular cytotoxicity (ADCC) agent through its high affinity, high specificity binding to extracellular domain of HER2 Receptor. Trastuzumab is supplied as a lyophilized, sterile powder containing 440 mg trastuzumab per vial under vacuum. Each carton contains one vial of 440 mg trastuzumab and one 30 ml vial of bacteriostatic water for injection, USP, 1.1% benzyl alcohol. This will be given the morning of surgery at 2mg/m2 IV over 90 minutes.
Other Name: Trastuzumab (Herceptin®) (NSC #688097)

OBJECTIVES:

• To determine the concentration of capecitabine, cyclophosphamide, doxorubicin hydrochloride, gemcitabine hydrochloride, lapatinib ditosylate, paclitaxel, trastuzumab (Herceptin®), or vinorelbine ditartrate in brain metastases in women with breast cancer.
• To analyze drug penetrability by modeling the relationship between drug concentration in the tumor and drug concentration in blood samples.

OUTLINE: Patients are assigned to receive 1 of the 8 agents by the patient's treating oncologist.

Patients receive a single dose of the following study drugs immediately preceding surgery: oral capecitabine; cyclophosphamide IV over 30 minutes; doxorubicin hydrochloride IV over 15 minutes; gemcitabine hydrochloride IV over 30 minutes; oral lapatinib ditosylate*; paclitaxel IV over 3 hours; trastuzumab (Herceptin®) IV over 30-90 minutes; or vinorelbine ditartrate IV over 10-30 minutes . Patients then undergo craniotomy for resection of the brain metastases.

NOTE: *Patients receive oral lapatinib ditosylate at least 3 days prior to surgery and immediately before surgery.

All patients receiving cyclophosphamide, doxorubicin hydrochloride, gemcitabine hydrochloride, paclitaxel, or vinorelbine ditartrate also receive a single dose of pegfilgrastim subcutaneously (SC) 24-48 hours after the study drug administration OR filgrastim (G-CSF) SC once daily for 10 days, beginning 24-48 hours after the study drug administration.

Blood samples are collected periodically for pharmacological studies. Tissue samples obtained at surgical resection and blood samples are used to establish cell lines and analyzed for drug concentration by HPLC, LC-MS/MS or ELISA.