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Stephanie L. Graff, MD, discusses what a community oncologist should know about her presentation on the Signatera assay in patients with hormone receptor-positive, HER2-negative, node-positive, high-risk early breast cancer after adjuvant abemaciclib and endocrine therapy.

Graff on Using the Signatera Assay to Assess ctDNA in Early Breast Cancer 

ASH 2024 Preview for Community Oncologists: The Show and After Show

The American Society of Hematology (ASH) Annual Meeting and Exposition aims to educate oncology providers across an array of hematologic malignancies, with a focus on novel agents, drugs across the FDA pipeline, and more.

, co-hosts Kristie L. Kahl and Andrew Svonavec offer a glimpse at some of the presentations guaranteed to spark one’s curiosity, spur debate, and enhance the field even further. Some key highlights include:

 Continued advancements in CAR T-cell therapy are expected to revolutionize the treatment of hematologic malignancies.

 Bispecific antibodies, such as Epcoritamab (Epkinly), offer a novel approach to target multiple antigens on cancer cells.

 The assessment of MRD is becoming increasingly important in predicting treatment response and overall survival.

Advances in Acute Lymphoblastic Leukemia (ALL)

Blinatumomab (Blincyto) in pediatric ALL:

 The addition of blinatumomab to chemotherapy has shown promise in improving disease-free survival in high-risk pediatric ALL. This combination therapy may offer a more effective treatment option for young patients.

Acalabrutinib (Calquence) in mantle cell lymphoma (MCL):

 The FDA is set to review the approval of acalabrutinib with bendamustine or rituximab (Rituxan) for previously untreated MCL, based on data from the phase 3 ECHO trial (NCT02972840).

Asciminib (Scemblix) in chronic phase chronic myelogenous leukemia (CML-CP):

 The FDA recently granted accelerated approval to asciminib for newly diagnosed CML-CP. This tyrosine kinase inhibitor has shown favorable safety and tolerability profiles.

 isn't just about data, as the duo also offers food recommendations, tourist attractions and fun activities to partake in, as well as interesting facts about San Diego.

This is just a taste of the wealth of information and inspiration waiting at the 2024 ASH Annual Meeting. Check back for future meeting previews with 

Targeted Oncology co-hosts Kristie L. Kahl and Andrew Svonavec highlight abstracts for community oncologists to look out for at the upcoming ASH Annual Meeting in San Diego, with some additional tidbits to round out the main event.

News

The biologics license application (BLA) of the subcutaneous formulation of nivolumab (Opdivo) coformulated with human hyaluronidase (rHuPH20) has been accepted by the FDA.

Findings from the CheckMate -67T (NCT04810078) support this BLA of subcutaneous nivolumab as the trial met its coprimary pharmacokinetic end points and key secondary end point of overall response rate (ORR) vs intravenous (IV) nivolumab in clear cell renal cell carcinoma.

The FDA has set a Prescription Drug User Fee Act (PDUFA) goal date for December 29, 2024.

The FDA has accepted the BLA of the subcutaneous formulation of nivolumab coformulated with rHuPH20, also known as subcutaneous nivolumab, for all previously approved adult solid tumor indications of nivolumab as a monotherapy, monotherapy maintenance following completion of the combination therapy with nivolumab plus ipilimumab (Yervoy), or in combination with chemotherapy or cabozantinib (Cabometyx).

Results from the phase 3 CheckMate -67T trial of subcutaneous nivolumab support this application. In the trial, experts sought to evaluate subcutaneous nivolumab vs its intravenous (IV) formulation.

 Here, the subcutaneous form demonstrated noninferior pharmacokinetics and efficacy, as well as consistent safety compared with the IV formulation of nivolumab among patients with advanced or metastatic clear cell renal cell carcinoma (ccRCC) who have received prior systemic therapy.

A PDUFA goal date has been set for December 29, 2024. With this, subcutaneous nivolumab shows promise to become the first and only subcutaneously administered PD-1 inhibitor.

“We believe subcutaneous nivolumab has the potential to make a significant difference in the lives of patients, which is reinforced by the FDA’s acceptance of our application,” said Gina Fusaro, PhD, vice president, global program lead, Bristol Myers Squibb, in a press release.

“[Nivolumab] is a foundational PD-1 inhibitor approved for many different types of cancer, and our continued investment in research that puts patients first remains a priority. If approved by the FDA, the subcutaneous administration of nivolumab would provide patients and their physicians with a new option that delivers the same well-known benefits as IV [nivolumab] but with the improved convenience of an injection administered in 3 to 5 minutes rather than a 30- to 60-minute infusion,” Fusaro continued.

The phase 3, randomized, open-label CheckMate -67T trial is exploring subcutaneous administration of nivolumab coformulated with rHuPH20 vs IV nivolumab for the treatment of patients with advanced or metastatic ccRCC who were previously treated with systemic therapy.

In the study, 495 patients were randomly assigned to receive either subcutaneous nivolumab or IV nivolumab. Enrollment was open to patients with a histological confirmation of ccRCC, advanced RCC not amenable to curative or radiation therapy, metastatic RCC, those who received no more than 2 prior systemic therapies, those with intolerance or progression after last treatment regimen within 6 months of randomization, and those with a Karnofsky performance score ≥ 70 at screening.

Experts assessed the coprimary end points of time-averaged serum concentration over 28 days and trough serum concentration at steady-state of subcutaneous nivolumab vs IV nivolumab. A key secondary end point of the trial was ORR.

The study met its coprimary pharmacokinetic end points and key secondary end point of ORR with subcutaneous nivolumab in this patient population.

 Subcutaneous nivolumab was noninferior in regard to time-averaged nivolumab serum concentration over 28 days and steady-state trough serum concentration vs treatment with IV nivolumab. Additionally, subcutaneous nivolumab also demonstrated a noninferior ORR compared with IV nivolumab.

1. U.S. Food and Drug Administration accepts Bristol Myers Squibb’s application for subcutaneous nivolumab (nivolumab and hyaluronidase). News release. Bristol Myers Squibb. May 6, 2024. Accessed May 6, 2024. 

2. Phase 3 Check-Mate -67T trial of subcutaneous nivolumab (nivolumab and hyaluranisade) meets co-primary end points in advanced or metastatic clear cell renal cell carcinoma. News release. Bristol Myers Squibb. October 19, 2024. Accessed May 6, 2024. 

3. A study of subcutaneous nivolumab versus intravenous nivolumab in participants with previously treated clear cell renal cell carcinoma that is advanced or has spread (CheckMate-67T). ClinicalTrials.gov. Updated October 12, 2023. Accessed May 6, 2024. 

https://www.clinicaltrials.gov/study/NCT04810078

The FDA is considering a subcutaneous nivolumab formulation for various solid tumors based on promising data from the phase 3 CheckMate -67T trial. A target action date has been set for December 29, 2024.

Clinical

FDA Accepts BLA for Subcutaneous Nivolumab Across Various Solid Tumors

How do you monitor and manage anemia in patients with primary myelofibrosis prior to starting Janus kinase (JAK) inhibitor therapy?​

How do you monitor and manage anemia in patients with myelofibrosis even prior to starting a JAK inhibitor? If you're initially evaluating someone, they come in with hemoglobin of 7 or 8 g/dL or something like that, how does that impact your thinking, and how do you work that up?

The first thing is to make sure that they don't have something easily fixable [such as] iron, B12, or folate deficiency. Theoretically, if you don't have any nutritional cause or any immune causes, you could use erythropoietin analogs, but they are very tricky because they don't help with the spleen, at least in my experience, and they may increase the risk of clots. I try to avoid them if possible. If I have to start a JAK inhibitor, if they have symptoms, either I go away from ruxolitinib [Jakafi] or I start a low dose of ruxolitinib. Sometimes I use anabolic steroids and prednisone. We have the thalidomide/prednisone [regimen] that now is kind of forgotten about.

Erythropoietin-stimulating agents [ESAs] are limited in what they do, and certainly not helping other aspects of the disease. You did mention one of my favorite regimens, thalidomide/prednisone, which is looked over a bit nowadays, but has quite a potential for efficacy in terms of improving hemoglobin. But it’s probably something that's gone by the wayside in many practices.

As Dr Lekakis says, there are some other options that you can use. Danazol is sometimes something you can use perfectly in this patient population. From the JAK inhibitors, there is momelotinib [Ojjaara]. But a priority for me is to refer a patient for a stem cell transplant; when I was a fellow, we did the first allogeneic bone marrow transplant at the University of Illinois, Chicago, and it was a very nice experience.

Dr Lekakis] also mentioned steroids, [and we are] thinking about things like danazol, androgen derivatives. We saw from the MOMENTUM study [NCT04173494] looking at momelotinib that danazol is an active agent.

 It was a large, randomized trial, one of the first randomized trials with danazol. The focus there was on momelotinib, but there's also a lot to learn about what danazol could do as well from that study.

You're mainly talking about anemia here, and [if], the patient is not a candidate for a transplant or a clinical trial [there are] the 

, which basically double the response and reduction of the spleen.

Yes, these emerging therapies to some degree may change how we approach this disease. But I think that with some of these older therapies, especially when you're when you're first talking about someone who's coming in with anemia, you need to think about ESA, danazol, and thalidomide/prednisone.

I think that ESA is probably the most prominently used. How many of you are checking serum erythropoietin levels in these patients to assess their candidacy for ESAs, is that a common practice?

Now in terms of the patient who develops anemia while receiving a JAK inhibitor, ruxolitinib or fedratinib [Inrebic], how do you then approach that patient? This is the someone on therapy who may not have had prominent anemia before, but now that anemia is a little bit more obvious.

I would reduce the dose. I cannot stop [ruxolitinib] easily because of the withdrawal symptoms, but I would reduce the dose.

I probably would be giving a lower dose or initiating at a lower dose if they are anemic, and then I can go up later if I have to.

With the option of reducing dose, and now newer JAK inhibitors that are available, how do you decide between changing therapy vs reducing the dose of ruxolitinib?

I would try to maximize the use of ruxolitinib and then go to the next drug.

Hemoglobin levels do not deter me from initiating ruxolitinib

The most common answer in about half of the responders is that a hemoglobin of 7 to 8 g/dL is a concerning level. We’ve hit on this before that if ruxolitinib drops hemoglobin on average by 1 to 2 g/dL, if you start in the 7s, that means you're going to drop to the 6s at least, and that’s an uncomfortable spot to be. Others have said less than 7 g/dL, some 8 to 9 g/dL, and then at least one for hemoglobin levels not deterring from ruxolitinib initiation. But I think in general, the 7 to 8 g/dL makes sense from a pragmatic point of view, given what we know about ruxolitinib, and I've heard that answer quite frequently.

Kuykendall previously disclosed consulting fees from CTI Biopharma, GSK, and Imago Biosciences; payment or honoraria from BMS, Incyte, and MorphoSys; travel support from AbbVie and MorphoSys; and advisory board participation with Incyte; no other relevant participant disclosures are known.

1. Verstovsek S, Gerds AT, Vannucchi AM, et al. Momelotinib versus danazol in symptomatic patients with anaemia and myelofibrosis (MOMENTUM): results from an international, double-blind, randomised, controlled, phase 3 study. 

. 2023;401(10373):269-280. doi:10.1016/S0140-6736(22)02036-0

2. Pemmaraju N, Mead AJ, Somervaille T, et al. Transform-1: a randomized, double-blind, placebo-controlled, multicenter, international phase 3 study of navitoclax in combination with ruxolitinib versus ruxolitinib plus placebo in patients with untreated myelofibrosis. Blood. 2023;142(suppl 1):620.doi:10.1182/blood-2023-173509

During a live event, Andrew Kuykendall, MD, discussed management of anemia before and during use of JAK inhibitor for myelofibrosis in the second of 2 articles. 

Reevaluating Available Options for Anemia in Myelofibrosis

KEY TAKEAWAYS FROM ADITYA BARDIA, MD, MPH​, FASCO

Trastuzumab deruxtecan and sacituzumab govitecan can be given to patients with metastatic HER2-low breast cancer after endocrine therapy and chemotherapy.

Progression-free survival and overall survival favor trastuzumab deruxtecan over chemotherapy in HER2-low disease.

The DESTINY-Breast06 trial showed similar outcomes for HER2-low and HER2-ultralow disease.

A 52-year-old postmenopausal woman underwent breast-conserving surgery plus radiation therapy for pT2 N1 invasive ductal carcinoma of the right breast, grade 2, estrogen receptor (ER)–positive, progesterone receptor–positive, HER2 1+ by immunohistochemistry (IHC); 21-gene recurrence score: 27​.

She received dose-dense doxorubicin and cyclophosphamide followed by paclitaxel and completed 10 years of tamoxifen.​

Five years later, she presented with disease recurrence in the liver, hormone receptor–positive, HER2-low, no actionable mutations on tissue next-generation sequencing​.

She received first-line letrozole plus ribociclib​ (Kisqali).

​She went on to receive ​fulvestrant for 6 months to disease progression in the bone and liver, then everolimus plus exemestane for 4 months to disease progression, followed by capecitabine for 6 months until disease progression.

Repeat circulating tumor DNA next-generation sequencing at each progression showed no actionable alteration.

Targeted Oncology: Do you consider this patient with metastatic breast cancer (mBC) to be eligible for sacituzumab govitecan (Trodelvy)?

If you look at the label of sacituzumab govitecan, it says 2 prior lines of systemic therapy; it does not say which kind, so you can make a case that the endocrine-based treatment was also systemic therapy.

 But the TROPiCS-02 trial [NCT03901339], which led to approval, required 2 prior lines of chemotherapy. Purely from a trial perspective, you should give 2 lines of chemotherapy, but in routine clinical practice, after capecitabine, that's when we consider trastuzumab deruxtecan [T-DXd] and sacituzumab govitecan.

Can you use T-DXd and sacituzumab one after another?

You can use them in sequence. There have been studies looking at the efficacy of one after the next,

 and there is some cross-resistance between these agents because they have similar payloads. In sacituzumab govitecan, SN38 is a topoisomerase-1 inhibitor. With T-DXd, deruxtecan is also a topoisomerase-1 inhibitor. But in some patients, it does work, and maybe in that setting, the disease progression is more because of the antigen, and so you're using a different antibody that works. But in some patients, you would see cross resistance.

If you look at our guidelines, you have both these drugs, T-DXd and sacituzumab govitecan. The guidelines would suggest T-DXd should be preferred for HER2-low disease.

 But if a patient is not a candidate for T-DXd, that's when you use sacituzumab. That could be either contraindication to T-DXd, or if a patient has HER2 IHC 0 mBC in that setting, you can use sacituzumab, and you can use them in sequence. If you start with one, you can use the other drug after that.

What data support the use of T-DXd in patients with HER2-low status?

This was based on DESTINY-Breast04 [NCT03734029], which looked at T-DXd vs standard chemotherapy for HER2-low, ER-positive breast cancer. It showed impressive improvement in both progression-free survival [PFS] and overall survival [OS]. We saw updated results last year, and essentially continue to see benefit with T-DXd vs a standard chemotherapy with median OS of about 24 months [vs 17.6 months for chemotherapy; HR, 0.69; 95% CI, 0.55-0.87].

During a Case-Based Roundtable® event, Aditya Bardia, MD, MS, FASCO, discussed data from the DESTINY-Breast04 and DESTINY-Breast06 trials for HER2-low breast cancer in the second article of a 2-part series.

Stephanie L. Graff, MD

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