A Study of Intravenous XMT-1001 in Patients With Advanced Solid Tumors

This is an open-label study of XMT-1001 administered intravenously over 4 hours every 21 days
(1 Cycle). Blood sampling for PK analyses will be performed immediately prior to dosing, and
9 times after dosing. Patients will be assessed for toxicities known to occur with other
drugs of this class, such as bone marrow suppression, elevated liver function enzymes,
hemorrhagic cystitis, and diarrhea. Tumor imaging will be performed every 2 cycles.

Inclusion Criteria:

1. At least 18 years old

2. Have histological or cytological documentation of one of the following:

A. NSCLC with Stage IV disease according to the American Joint Cancer Commission TNM
Staging (7th Edition)

- Have received at least one prior chemotherapy regimen but no more than two
chemotherapy regimens for their advanced disease (not containing irinotecan or
topotecan).

- Adjuvant chemotherapy will be considered as a prior chemotherapy regimen only if
it is completed less than 6 months prior to enrollment.

- Treatment with erlotinib or crizotinib as single agents will not be considered as
a chemotherapy regimen for purposes of this trial OR B. SCLC with Stage IV
(extensive) or recurrent disease after definitive treatment for limited stage
disease according to the American Joint Cancer Commission TNM Staging (7th
Edition)1

- Have received at least one prior chemotherapy regimen but no more than two
chemotherapy regimens for their advanced disease (not containing irinotecan or
topotecan).

- Adjuvant chemotherapy will be considered as a prior chemotherapy regimen only if
it is completed less than 6 months prior to enrollment.

3. Patients must be refractory or resistant to standard therapy or for whom standard
therapy is not anticipated to be curative and who have progressed through prior
regimens.

4. Patients must have measurable disease with at least one lesion that can be accurately
measured by Response Evaluation Criteria in Solid Tumors (RECIST). The lesion size
must be ≥20 mm by conventional radiological techniques or ≥10 mm by spiral CT scan.
Disease in an irradiated field as the only site of measurable disease is acceptable if
there has been a clear progression of the lesion. PET scans are not suitable for
providing these measurements. For patients who are sensitive to contrast, MRI may be
used.

5. Patients with CNS metastases are acceptable provided that the disease has been treated
(e.g. surgery, whole brain radiotherapy, stereotactic radiotherapy etc.) and the
patient is stable for at least two weeks and does not require steroids (at least one
week off steroids). Anti-seizure medication is allowed at the discretion of the
treating physician.

6. At least 42 days since administration of mitomycin or nitrosoureas, and 28 days since
any other chemotherapy, investigational agent, and/or radiation therapy.

7. Have the following laboratory values:

- Absolute neutrophil count (ANC) ≥1500 cells/mm3

- Platelet count >100,000 cells/mm3

- Hemoglobin ≥9.0 g/dL

- Adequate renal function (serum creatinine ≤2 mg/dL) and creatinine clearance ≥45
mL/min (Calculated by Cockroft and Gault method)

- Adequate hepatic function (bilirubin ≤1.5 mg/dL)

- Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5 times
the institutional upper limit of normal (ULN, or

- 5 times the ULN if liver metastases are present)

- Albumin of >3.0 g/dL

- PT and PTT ≤1.5 times the ULN

8. Have an Eastern Cooperative Oncology Group Performance Status (ECOG PS) 0-1.

9. Have a life expectancy of at least 3 months.

10. Have signed an informed consent form.