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Patients receive ascorbic acid IV on days 1, 3, 5, 8, 10, 12, 15, 17, and 19, and rituximab intravenously IV, ifosfamide IV, carboplatin IV and etoposide IV on days 1-3. Patients who achieve MR or SD after 2 cycles may receive rituximab IV or PO, cisplatin IV or PO, cytarabine IV or PO, and dexamethasone IV or PO. Treatment repeats every 21 days for up to 4 cycles in the absence of disease progression or unacceptable toxicity. Patients additionally, undergo blood sample collection, core needle biopsy, bone marrow aspiration and biopsy, ECHO, PET/CT or MRI throughout study.

Patients receive placebo (normal saline) IV on days 1, 3, 5, 8, 10, 12, 15, 17, and 19, and rituximab intravenously IV, ifosfamide IV, carboplatin IV and etoposide IV on days 1-3. Patients who achieve MR or SD after 2 cycles may receive rituximab IV or PO, cisplatin IV or PO, cytarabine IV or PO, and dexamethasone IV or PO. Treatment repeats every 21 days for up to 4 cycles in the absence of disease progression or unacceptable toxicity. Patients additionally, undergo blood sample collection, core needle biopsy, bone marrow aspiration and biopsy, ECHO, PET/CT or MRI throughout study.

Patients receive ascorbic acid IV on days 1, 3, 5, 8, 10, 12, 15, 17, and 19. Patients also receive ifosfamide, carboplatin, and etoposide IV or PO, or cisplatin, cytarabine, and dexamethasone IV or PO, or gemcitabine hydrochloride, dexamethasone, and cisplatin IV or PO, or gemcitabine hydrochloride and oxaliplatin IV or PO, or oxaliplatin, cytarabine, and dexamethasone IV or PO according to standard regimen schedule. Treatment repeats every 21 days for up to 4 cycles in the absence of disease progression or unacceptable toxicity. Patients who achieve MR or SD after 2 cycles may switch to an alternative chemotherapy regimen. Patients additionally, undergo blood sample collection, core needle biopsy, bone marrow aspiration and biopsy, ECHO, PET/CT or MRI throughout study.

Patients receive ascorbic acid IV TIW. Treatments repeat every 28 days for up to 3 cycles in the absence of disease progression or unacceptable toxicity. Patients undergo PICC or portacath placement prior to starting treatment, blood sample collection, bone marrow aspiration and biopsy throughout study.

Patients receive ascorbic acid IV on days 1, 3 and 5 and decitabine IV over 1 hour on days 1-5. Treatment repeats every 28 days for up to 12 cycles in the absence of disease progression or unacceptable toxicity. Patients with stable disease after 12 cycles may continue decitabine with or without ascorbic acid as long as clinically appropriate. Patients may also take vitamin C PO on days 6-28. Patients undergo PICC or portacath placement prior to starting treatment, blood sample collection, bone marrow aspiration and biopsy throughout study.

Gemcitabine Hydrochloride

Laboratory Biomarker Analysis

Placebo Administration

Questionnaire Administration

Biospecimen Collection

Core Biopsy

Undergo bone marrow aspiration and biopsy

Bone Marrow Aspiration

Bone Marrow Biopsy

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Clinical Trials Referral Office

Craig B. Reeder, M.D.

Taimur Sher, M.D.

Umar Farooq, M.D.

Thomas E. Witzig, M.D.

Traci Heaney

Thomas E Witzig, M.D.

This phase II trial studies the effect of ascorbic acid and combination chemotherapy in treating patients with lymphoma that has come back (recurrent) or does not respond to therapy (refractory), clonal cytopenia of undetermined significance and chronic myelomonocytic leukemia (CMML). Ascorbic acid may make cancer cells more sensitive to chemotherapy. Drugs used in chemotherapy, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving ascorbic acid and combination chemotherapy may kill more cancer cells.

PRIMARY OBJECTIVES:

I. To determine the overall response rate (ORR) at the end of 2 cycles for intravenous (IV) ascorbic acid (AA) added to standard salvage therapy compared to standard salvage therapy plus normal saline in patients with relapsed/refractory diffuse large B-cell lymphoma (DLBCL) who have relapsed within the first 24 months of end of their therapy. (Arms A versus \[vs\] B) II. To determine the ORR at the end of 2 cycles of AA plus standard salvage chemotherapy in patients with other types of relapsed/refractory lymphomas not eligible for Arms A/B (peripheral T-cell lymphoma \[PTCL\], double-hit high grade, and Hodgkin lymphoma \[HL\]). (Arm C) III. To assess the hematological response rate to treatment with high dose intravenous ascorbic acid (IV AA) for clonal cytopenia of undetermined significance (CCUS) patients. (Arm D) IV. To assess the hematological response rate to treatment with high dose intravenous ascorbic acid (IV AA) for CCUS patients. (Arm E)

SECONDARY OBJECTIVES:

I. To compare the adverse event profile of IV AA added to salvage therapy versus salvage therapy plus IV saline in patients with DLBCL using both the Common Terminology Criteria for Adverse Events (CTCAE) and Patient-Reported Outcomes (PRO)-CTCAE. (Arms A and B) II. To compare the progression-free survival, overall survival, clinical benefit rate (those not progressing), and percentage (%) transplant eligible patients proceeding to transplant of AA added to salvage therapy versus salvage therapy plus IV saline in patients with DLBCL. (Arms A and B) III. To compare the ORR at the end of 4 cycles for those with minor response/stable disease at the end of cycle 2 who proceed to receive the additional 2 cycles of rituximab, dexamethasone, cytarabine and cisplatin (RDHAP) with either AA or normal saline (NS) as previously assigned. (Arms A and B) IV. To evaluate the adverse event profile, rate of febrile neutropenia, overall survival, progression-free survival, and clinical benefit rate of AA added to salvage therapy in patients with relapsed/refractory lymphoma. (Arm C) V. To assess safety/tolerability, transfusion dependency (TD), progression-free survival (PFS), and overall survival (OS) for CCUS patients receiving high dose IV AA. (Arm D) VI. To define CR, complete cytogenetic remission, partial remission, marrow response, and clinical benefit response rates. (Arm E) VII. To determine clinical benefit response rates of erythroid response, platelet response, neutrophil response, spleen response and symptom response as adjudicated by the Myeloproliferative Neoplasm Symptom Assessment Form (MPN-SAF) total symptom scoring system. (Arm E)

EXPLORATORY OBJECTIVES:

I. Will include baseline AA levels (at Mayo Clinic Research \[MCR\]) and staining of pre/post treatment biopsies for markers of oxidative stress generation and deoxyribonucleic acid (DNA) methylation. (Arms A, B, and C Correlative Research on blood and tumor tissue) IIa. To assess TET2 activity at baseline, weeks 12, 20, and 52. (Arm D correlative research) IIb. To assess the association between using AA and the hydroxymethylation and methylation status (gene-specific and global changes in 5mC/5hmC level) at baseline and weeks 20 and 52. (Arm D correlative research) IIc. To assess the association between using IV AA and endothelial dysfunction (at baseline, weeks 20, and 52). (Arm D correlative research) IId. To assess the association between using IV AA and the inflammation markers. (Arm D correlative research) IIe. To assess the association between using IV AA and molecular response including clonal dynamics (new mutations and variant allele frequency \[VAF\]) (at baseline, weeks 20, and 52). (Arm D correlative research)

III. Correlative studies will assess impact on:

IIIa. Somatic mutational allele burdens after 4 cycles of therapy; IIIb. DNA methylation and hydroxymethylation after 4 cycles of therapy; IIIc. Inflammatory cytokines; IIId. Colony forming assay growth and differentiation; IIIe. Methylation at the single colony level; IIIf. Single cell methylation, transcription, and somatic mutations. (Arm E correlative research)

OUTLINE: Patients with DLBCL are randomized to Arms A or B. Patients with other lymphomas are assigned to Arm C. Patients with CCUS are assigned to Arm D. Patients with TET2 mutant CMML are assigned to ARM E.

Arm A: Patients receive ascorbic acid IV on days 1, 3, 5, 8, 10, 12, 15, 17, and 19, and rituximab intravenously (IV), ifosfamide IV, carboplatin IV and etoposide IV on days 1-3. Patients who achieve minor response (MR) or stable disease (SD) after 2 cycles may receive rituximab IV or PO, cisplatin IV or PO, cytarabine IV or PO, and dexamethasone IV or PO. Treatment repeats every 21 days for up to 4 cycles in the absence of disease progression or unacceptable toxicity.

ARM B: Patients receive placebo (normal saline) IV on days 1, 3, 5, 8, 10, 12, 15, 17, and 19, and rituximab intravenously IV, ifosfamide IV, carboplatin IV and etoposide IV on days 1-3. Patients who achieve MR or SD after 2 cycles may receive rituximab IV or PO, cisplatin IV or PO, cytarabine IV or PO, and dexamethasone IV or PO. Treatment repeats every 21 days for up to 4 cycles in the absence of disease progression or unacceptable toxicity.

ARM C: Patients receive ascorbic acid IV on days 1, 3, 5, 8, 10, 12, 15, 17, and 19. Patients also receive ifosfamide, carboplatin, and etoposide IV or PO, or cisplatin, cytarabine, and dexamethasone IV or PO, or gemcitabine hydrochloride, dexamethasone, and cisplatin IV or PO, or gemcitabine hydrochloride and oxaliplatin IV or PO, or oxaliplatin, cytarabine, and dexamethasone IV or PO according to standard regimen schedule. Treatment repeats every 21 days for up to 4 cycles in the absence of disease progression or unacceptable toxicity. Patients who achieve MR or SD after 2 cycles may switch to an alternative chemotherapy regimen.

ARM D: Patients receive ascorbic acid IV three times a week (TIW). Treatments repeat every 28 days for up to 3 cycles in the absence of disease progression or unacceptable toxicity.

ARM E: Patients receive ascorbic acid IV on days 1, 3 and 5 and decitabine IV over 1 hour on days 1-5. Treatment repeats every 28 days for up to 12 cycles in the absence of disease progression or unacceptable toxicity. Patients with stable disease after 12 cycles may continue decitabine with or without ascorbic acid as long as clinically appropriate. Patients may also take vitamin C PO on days 6-28.

In Arms A, B, and C, patients who achieve complete response (CR), partial response (PR) or MR may undergo stem cell transplantation. Patients additionally, undergo blood sample collection, core needle biopsy, bone marrow aspiration and biopsy, echocardiography (ECHO), positron emission tomography (PET)/ computed tomography (CT) or magnetic resonance imaging (MRI) throughout study.

Patients in ARM D and E undergo peripherally inserted central catheter (PICC) or portacath placement prior to starting treatment, blood sample collection, bone marrow aspiration and biopsy throughout study.

After completion of study treatment, patients are followed up every 3 months, then every 6 months after progressive disease for up to 2 years.

Ascorbic Acid and Chemotherapy for the Treatment of Relapsed or Refractory Lymphoma, CCUS, and Chronic Myelomonocytic Leukemia

Phase2 Trial of High Dose Intravenous Ascorbic Acid as an Adjunct to Salvage Chemotherapy in Relapsed/ Refractory Lymphoma, Patients With Clonal Cytopenia of Undetermined Significance, and Chronic Myelomonocytic Leukemia

Will consider the correlative research exploratory.

Variant allele frequency (VAF), biomarkers levels from Olink study, values of the cytokines, endothelial dysfunction, inflammation markers and levels of 5mc/5hmc will be measured at baseline, after completion of treatment (at 20 weeks), and at one-year post-registration. Values will be summarized graphically and descriptively at each time point and changes across time will be explored. Due to small sample size, these correlative analyses will be considered exploratory.

Defined as a 2 standard deviation reduction in VAF from baseline VAF. Exact binomial 95% confidence intervals for the true success rate will be calculated.

Values will be summarized graphically and descriptively at each time point and changes across time will be explored.

Defined as an objective status of complete response (CR) or partial response (PR) evaluated by Response Evaluation Criteria in Lymphoma (RECIL) criteria after 2 courses of treatment in all arms. Will be compared between the two arms. The proportion of successes will be estimated in each arm by the number of successes divided by the total number of evaluable patients. Exact binomial ninety-five percent confidence intervals for the true success proportion will be calculated in each arm. For the diffuse large B-cell lymphoma (DLBCL) arms, comparison of overall response rates between the two treatment groups will be performed using a one-sided chi-square test at significance level 0.10.

Defined as an objective status of CR or PR evaluated by RECIL criteria after 2 cycles of treatment. The proportion of successes will be estimated by the number of successes divided by the total number of evaluable patients. Exact binomial ninety-five percent confidence intervals for the true success proportion will be calculated in each arm.

Defined as an objective status of HI-E (minor or major response), HI-P, or HI-N evaluated by Myelodysplastic Syndrome International Working Group (IWIG) 2018 criteria at 20 weeks. Exact binomial ninety-five percent confidence intervals for the true success proportion will be calculated in each arm.

Defined as an objective status of complete remission, complete cytogenetic remission, partial remission, bone marrow response, or clinical benefit after 4 cycles of therapy as defined by the 2015 IWG myelodysplastic syndrome/ myeloproliferative neoplasm response criteria.

Will be estimated in each arm by the number of patients who achieve a CR, PR, minor response (MR), or stable disease (SD) on the cycle 2 response assessment divided by the total number of evaluable patients. Exact binomial 95% confidence intervals for the true success rate will be calculated. The clinical benefit rate will be compared between the DLBCL arms using the chi-square test (or Fisher's exact test if the data in the contingency table is sparse).

The distribution of overall survival will be estimated in each arm using the method of Kaplan-Meier. In the DLBCL arms, the comparison of overall survival between the two treatment arms will be based on the log-rank test.

The distribution of progression-free survival will be estimated in each arm using the method of Kaplan-Meier. In the DLBCL arms, the comparison of progression-free survival between the two treatment arms will be based on the log-rank test.

Will be estimated in each arm by the number of patients proceeding to transplant divided by the total number of patients who were considered transplant eligible. Exact binomial 95% confidence intervals for the true success rate will be calculated. The rate will be compared between the DLBCL arms using the chi-square test (or Fisher's exact test if the data in the contingency table is sparse).

Transfusion dependency will be summarized descriptively. The number of patients transfusion dependent at baseline and during follow-up will be summarized.

Assessed using Common Terminology Criteria for Adverse Events (CTCAE). The maximum grade for each type of adverse event will be recorded for each patient, and frequency tables will be reviewed to determine patterns. Additionally, the relationship of the adverse event(s) to the study treatment will be taken into consideration. In the DLBCL arms, the overall adverse event rates for Grade 3 or higher hematologic and non-hematologic adverse events at least possibly related to treatment will be compared between the two treatment groups using the chi-square test (or Fisher's exact test if the data in the contingency table is sparse). The rate of febrile neutropenia will be evaluated in each arm.

Assessed using Patient Reported Outcomes (PRO)-CTCAE (Arms A and B). PRO-CTCAE scores range from 0-4, with corresponding response choices for frequency (Never / Rarely / Occasionally / Frequently / Almost constantly), for severity (None / Mild / Moderate / Severe / Very severe) and interference (Not at all / A little bit / Somewhat / Quite a bit / Very much). The scores for each type of adverse event will be recorded for each patient, and frequency tables will be reviewed to determine patterns. PRO-CTCAE scores will be compared between the two treatment groups using the chi-square test (or Fisher's exact test if the data in the contingency table is sparse).

Will be assessed by evaluating the number of patients who achieve an improved response after cycle 4 compared to the cycle 2 assessment in patients who received additional cycles of ascorbic acid/placebo added to salvage therapy beyond cycle 2. In addition, the number of patients who changed salvage therapies after cycle 2 will be assessed. This analysis will be primarily descriptive.

The rates of complete response, complete cytogenetic remission, partial remission, marrow response, and clinical benefit will be estimated by the number of patients with each response type divided by the number of evaluable patients.

The rates of erythroid response, platelet response, neutrophil response, spleen response and symptom response will be estimated by the number of patients with each response type divided by the number of evaluable patients.

National Cancer Institute (NCI)

Mayo Clinic

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Ascorbic Acid and Chemotherapy for the Treatment of Relapsed or Refractory Lymphoma, CCUS, and Chronic Myelomonocytic Leukemia	NCT03418038	Clonal Cytopeni... High Grade B-Ce... Recurrent Diffu... Recurrent Hodgk... Recurrent Lymph... Refractory Diff... Refractory Lymp... Chronic Myelomo...	Ascorbic Acid Carboplatin Cisplatin Cytarabine Dexamethasone Etoposide Gemcitabine Hyd... Ifosfamide Laboratory Biom... Oxaliplatin Placebo Adminis... Questionnaire A... Rituximab Decitabine Biospecimen Col... Core Biopsy Bone Marrow Asp... Bone Marrow Bio... Echocardiograph... Positron Emissi... Magnetic Resona... Central Venous ... Portacath Place... Computed Tomogr...	18 Years -	Mayo Clinic
Ascorbic Acid and Chemotherapy for the Treatment of Relapsed or Refractory Lymphoma, CCUS, and Chronic Myelomonocytic Leukemia	NCT03418038	Clonal Cytopeni... High Grade B-Ce... Recurrent Diffu... Recurrent Hodgk... Recurrent Lymph... Refractory Diff... Refractory Lymp... Chronic Myelomo...	Ascorbic Acid Carboplatin Cisplatin Cytarabine Dexamethasone Etoposide Gemcitabine Hyd... Ifosfamide Laboratory Biom... Oxaliplatin Placebo Adminis... Questionnaire A... Rituximab Decitabine Biospecimen Col... Core Biopsy Bone Marrow Asp... Bone Marrow Bio... Echocardiograph... Positron Emissi... Magnetic Resona... Central Venous ... Portacath Place... Computed Tomogr...	18 Years -	Mayo Clinic

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