JZP458 - Recombinant Erwinia Asparaginase for Treatment of ALL / LBL Patients With Hypersensitivity to E. Coli-derived Asparaginase

Adult and pediatric patients with Acute Lymphoblastic Leukemia (ALL) or Lymphoblastic Lymphoma (LBL) who are hypersensitive to E.coli-derived asparaginases (allergic reaction or silent inactivation) and meet the criteria below: Inclusion Criteria (Initial Requests): * Patient (or parent/legally authorized representative thereof) is able to understand and voluntarily give informed consent/assent * Patient has a diagnosis of ALL or LBL * Patient received appropriate standard treatment without success (or no standard treatment exists for the patient's condition), and no satisfactory alternative drug is available * Patient had a ≥ Grade 2 allergic reaction (Common Terminology Criteria for Adverse Events \[CTCAE\] v5.0) to a long-acting E. coli-derived asparaginase OR have silent inactivation * Patient, in Investigators' opinion, has fully recovered from their prior allergic reaction to E. coli-derived asparaginase Note: Patients must have completed antihistamine, epinephrine, and/or corticosteroid treatment for the allergic reaction ≥ 24 hours prior to JZP458 administration. * Patient has adequate liver function, defined as: direct (conjugated) bilirubin ≤ 3X upper limit of normal (ULN); serum glutamic pyruvic transaminase (SGPT)(alanine aminotransferase \[ALT\]), and serum glutamic-oxaloacetic transaminase (SGOT)(aspartate transaminase \[AST\]) ≤ 5X ULN * For female patients of childbearing potential (i.e., fertile, following menarche) and male patients who have female partners of childbearing potential: * Patient has agreed to use medically acceptable methods of contraception with their partners for the duration of treatment with JZP458 and for 30 days after the last dose of JZP458. * Medically acceptable methods of contraception that the patient may use include abstinence, progestogen-only oral hormonal contraception, where inhibition of ovulation is not the primary mode of action; a combination of male condoms with either cap, diaphragm, or sponge with spermicide (double barrier methods). Exclusion Criteria (Initial Requests): * Patient is currently taking part in or is eligible for a clinical trial for JZP458 * Patient previously received asparaginase Erwinia Chrysanthemi AND has access to a short-acting non-E. Coliasparaginase * Patient experienced concern of a possible adverse event (AE) related to asparaginase Erwinia Chrysanthemi * Patient to receive asparaginase Erwinia Chrysanthemi within 1 week of plans to start JZP458 * Patient is concurrently receiving another investigational agent and/or treated with an investigational device at the same time as JZP458(within 48 hours) * Patient has a history of ≥ Grade 3 pancreatitis (per CTCAE v5.0) * Patient has a history of ≥ Grade 3 hypersensitivity to asparaginase Erwinia Chrysanthemi * Patient has a prior history of asparaginase-associated ≥ Grade 3 (per CTCAE v5.0) haemorrhagic event or asparaginase-associated thrombus requiring anticoagulation therapy, excluding catheter-related thrombotic events * Female patients who are lactating and do not agree to stop breast-feeding Eligibility Criteria (Re-Supply Requests) * Patient remains eligible for inclusion in the Expanded Access Protocol (EAP) * Patient continues to benefit from treatment with JZP458 * Patient has not encountered unacceptable toxicity * Patient has not shown signs/symptoms of relapsed or refractory disease * Patient has not encountered ≥ Grade 3hypersensitivity symptoms * Patient is not pregnant or breastfeeding