Study of Opebacan in Patients Undergoing Myeloablative Allogeneic Hematopoietic Stem Cell Transplantation (HSCT)

The objectives of this study are as follows:

To demonstrate the safety of escalating doses of opebacan in subjects undergoing myeloablative allogeneic Hematopoietic Stem Cell Transplantation

To determine the pharmacokinetics of opebacan in subjects undergoing myeloablative allogeneic Hematopoietic Stem Cell Transplantation

To determine if IV administration of opebacan is associated with changes in biological markers for inflammation

To develop preliminary descriptive data on the occurrence and severity of Hematopoietic Stem Cell Transplantation related complications, including aGvHD

IV infusion of opebacan to replace endogenous BPI during the peritransplant period will result in the reduction of LPS-induced inflammatory sequelae, in particular aGvHD, in patients undergoing allogeneic HSCT.

The rationale for using opebacan in patients undergoing myeloablative regimens and HSCT is based on the following:

Endotoxemia has been demonstrated to play a central pathophysiologic role as a trigger of aGvHD in animal models.

Endotoxemia following HSCT is associated with inflammatory conditions (such as inflammatory cytokine release) that have been demonstrated in humans to be associated with organ damage and increased morbidity and mortality.

Endotoxemia and LBP elevation have been demonstrated in humans undergoing ablative HSCT.

Chemotherapy-induced neutropenia results in a deficiency of endogenous BPI levels.

The timing of the endotoxemic insult is predictable (i.e., subsequent to myeloablative chemotherapy and radiotherapy).

The return to normal neutrophil levels is not immediate and takes one week to several weeks.

Well established laboratory techniques for surrogate markers related to LPS presence and its activities can facilitate the evaluation of molecules designed to inhibit or antagonize LPS and its effects.

The objectives of this study are as follows:

To demonstrate the safety of escalating doses of opebacan in subjects undergoing myeloablative allogeneic Hematopoietic Stem Cell Transplantation

To determine the pharmacokinetics of opebacan in subjects undergoing myeloablative allogeneic Hematopoietic Stem Cell Transplantation

To determine if IV administration of opebacan is associated with changes in biological markers for inflammation

To develop preliminary descriptive data on the occurrence and severity of Hematopoietic Stem Cell Transplantation related complications, including aGvHD

Eligibility Criteria:
Inclusion Criteria:

* Age \<= 60 and undergoing allogeneic HSCT
* Life expectancy \> 8 weeks
* Scheduled for treatment with a conditioning regimen intended to be myeloablative
* Female subjects of child-bearing age must have a negative urine pregnancy test. Sexually active male and female subjects of reproductive age must be using a form of contraception considered effective and medically acceptable by the Investigator.

Exclusion Criteria:

* Cumulative lifetime exposure of \> 300 mg/M2 of anthracycline (expressed as doxorubicin equivalent dose) or receipt of anthracycline within 180 days prior to initiating conditioning for HSCT
* Active infection
* Prophylactic antibacterial antibiotics.
* Positive for HIV, HTLV-I, or HTLV-II
* Any prior stem cell transplant
* Prior history of CHF
* Cord blood is the source of a subject's transplanted cells.