Innovative Lung Cancer Treatments Bring Hope

Following the results of multiple landmark clinical trials reported for the first time in late-breaking presentations at the ESMO Congress 2023, more people with non-small cell lung cancer (NSCLC) are likely to benefit from new drugs that target molecular alterations in tumor cells, with less need for chemotherapy. Better results were obtained with combinations of investigational novel medications targeting common and unusual tumor mutations than with standard therapies, with benefits found in both early and late-stage NSCLC – the kind of lung cancer that accounts for around eight out of ten occurrences of the disease.

The results are very impressive and mean that we can expect major changes in first-line treatment for patients with NSCLC with these targetable tumour cell alterations, and in the way we care for patients whose previous treatment has stopped working. As a result, it will be more important than ever that lung cancer is diagnosed and treated by lung cancer specialists with access and understanding of molecular testing and findings.”

Professor Alessandra Curioni-Fontecedro, University of Fribourg, Switzerland

Dr Elene Mariamidze, Todua Clinic, Tbilisi, Georgia, agreed: “We are entering an era of personalized medicine in NSCLC where we are using combinations of novel, targeted agents, and it will be essential to know the whole mutational burden of each patient at diagnosis so we can properly plan the most effective and least toxic approach. The future of lung cancer care lies in finding the right combination of targeted treatment, or chemotherapy with immunotherapy for each patient.”

Curioni-Fontecedro and Mariamidze both highlighted findings from studies that used a new combination of targeted medications in patients with advanced or metastatic NSCLC who had an EGFR mutation, which is one of the most frequent tumor mutations. People who received the combination as first-line treatment had considerably higher progression-free survival (PFS) than those who received the current most effective medication for the mutation. When compared to chemotherapy alone, the novel targeted medicines combined with chemotherapy dramatically improved PFS in individuals who had already progressed on the current standard of care.

“We still need to see that the new combination leads to improved overall survival compared with current treatment. We also need to understand more about the effects in patients with brain metastases as it appears that one of the newer EGFR-targeting agents used in these studies has good penetration of brain tissue,” commented Curioni-Fontecedro.

“These studies show that patients now have a potentially new drug combination for their treatment that works partly by targeting EGFR mutations, and partly by directing immune cells to destroy cancer cells. The fact that the combination worked better than the current standard of care, not just better than placebo, shows tangible benefits for this new approach,” added Mariamidze.

NSCLC research published at the ESMO Congress 2023 further suggest that employing mutation-targeted treatment can lessen the requirement for chemotherapy in some patients, especially those with uncommon tumor changes for whose targeted treatment options were previously limited. Patients with operable, early-stage ALK-positive NSCLC, RET-mutated advanced NSCLC, and the less frequent, more difficult-to-treat EGFR mutation, Exon 20 insertion, advanced NSCLC are among those included.

Furthermore, study findings support the value of combining immunotherapy with chemotherapy in some types of NSCLC, including the use of this treatment before surgery for patients with operable cancers to shrink tumors and predict likely response to subsequent treatment after surgery (so-called neoadjuvant treatment).

“We know that patients have a better prognosis if pre-surgical treatment of lung cancer leads to tumor disappearance on pathology reports after surgery (pCR-pathologic complete response) than if there are still obvious cancer cells present in post-surgical material. The new results show that adding immunotherapy to chemotherapy before surgery, and then continuing with maintenance immunotherapy for a year after surgery, is more effective than just giving chemotherapy before surgery,” Mariamidze pointed out.

There is positive news for patients with advanced or metastatic NSCLC who have relapsed after previous treatments and can only be treated with chemotherapy. Using antibody-drug conjugates to direct chemotherapy more specifically at tumors, namely antibodies that detect certain proteins typically seen in lung malignancies, dramatically improved PFS compared to conventionally utilized chemotherapy.

“The approach using these antibody drug conjugates will make a big difference for the majority of patients with advanced or metastatic NSCLC who have stopped responding to first and second-line treatments, irrespective of whether they have targetable mutations. We need to know more about the side-effects of this approach but these findings are likely to change the standard of care for these patients,” predicted Curioni-Fontecedro.

Following the presentation of such promising NSCLC data at ESMO 2023, the next step for both Curioni-Fontecedro and Mariamidze is to further understand the treatment sequence that will provide the greatest outcomes for patients.

“We still face the dilemma of what we do after patients have had these promising new drugs and need further treatment. It will be very important to understand the sequencing of treatment now that we have so many more options for treating NSCLC so that we can achieve the best possible results for each patient,” said Curioni-Fontecedro.

Very few patients benefit from one therapy alone, and most will need combinations of treatments at different times in their lung cancer care. We need further research to show when and how to target different mutations, possibly including new targets, and to help establish the ideal treatment plan for patients with lung cancer who develop extensive disease,” concluded Mariamidze.

For more information: European Society for Medical Oncology (ESMO)