Public Release: 

Immunotherapy is safe and feasible in cancer patients treated for HIV, study suggests

Results raise hopes that HIV-positive cancer patients could benefit from innovative treatment option

European Society for Medical Oncology

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IMAGE: Dr. Aurélien Gobert of Groupe Hospitalier Pitié Salpêtrière in Paris, France, study author. view more 

Credit: © European Society for Medical Oncology

Munich, Germany, 20 October 2018 - Immunotherapy has been a major breakthrough in oncology, with registered drugs now approved for use in an increasing number of tumour types - but little is known about its safety for HIV-positive cancer patients. A study (1) to be presented at the ESMO 2018 Congress in Munich has now provided data to suggest that treatment with PD-1/PD-L-1 immune checkpoint inhibitors, which target the very system affected by the HIV virus, is feasible in this patient population for whom cancer is currently one of the principal cause of mortality.

According to study author Dr. Aurelien Gobert of Groupe Hospitalier Pitie Salpetrire in Paris, France, there are about two million people living with HIV in Europe today. "These patients are at higher risk for a number of cancers: AIDS-defining forms, the diagnosis of which results in the categorisation of a person as suffering from AIDS, but also various other types that they are two to three times more likely to develop than in the general population, such as anal, skin, head and neck, and lung cancer," he explained. HIV-positive cancer patients are not represented in clinical drug trials, which select candidates with the lowest probability of suffering complications, so their responses to new therapies are not immediately known.

"The point of this study was to look at an HIV-positive patient cohort treated with immunotherapy in conjunction with a close monitoring of their viral load and CD4 lymphocyte count," said Gobert. "Viral load is the quantity of virus found in the bloodstream, and CD4 lymphocytes are the cells of the immune system that HIV targets. Both measures are indicators of the extent to which a person is affected by the virus: patients treated properly with antiretroviral therapy typically have a lymphocyte count of 350-500/mm3 and a viral load that is undetectable."

To assess the effects of the PD-1 inhibitor nivolumab in this population, cases presented in the multidisciplinary meetings of the national Cancer VIH network (2) were evaluated. In addition to CD4 lymphocyte count and viral load, tolerance and efficacy information was retrospectively collected from patients treated with this drug, along with demographic data. "Our study population was demographically homogenous, most patients being males around 60 years old," Gobert reported.

Out of the 20 patients evaluated, one (5%) had metastatic melanoma - the remaining 95% were treated for metastatic non small-cell lung cancer. Median lymphocyte count at diagnosis was 338.5/mm3. Viral load was undetectable in 17 patients, low in two cases and unknown in one person. At the time of the cut-off analysis, median follow-up was almost 11 months, and the median number of nivolumab infusions received was six (ranging from three to 53).

"We didn't see any toxic deaths or immune-related adverse events," Gobert reported. "One patient did experience a rising HIV viral load and decreasing CD4 lymphocyte count, indicating a reactivation of the virus, but this occurred following the interruption of his antiretroviral therapy." Of the 17 individuals in whom response could be assessed, a partial response was observed in four patients, while two had stable disease and the majority (eleven) had disease progression at the first evaluation.

"Although the response data is fairly consistent with results obtained with the same drug among other cancer patients, the size of our sample and the length of follow-up do not allow us to draw any conclusions regarding efficacy," Gobert cautioned. "We know that few patients respond to immunotherapy, but those who do respond for long periods of time and thus have significantly improved survival. This seems to have been the case for the melanoma patient in our cohort, but the study is too recent for us to quantify survival rates at this time."

"Our key insight then, is that the treatment appears to be well tolerated by HIV-positive cancer patients - so long as antiretroviral therapy is continued in parallel," Gobert concluded. "It speaks to the feasibility of immunotherapy in this patient population, which represents a significant proportion of cancer diagnoses, and among whom malignancies accounted for more than a third of deaths in 2010. (3) Going forward, this will need to be confirmed for various tumour types."

Commenting on this study for ESMO, Prof. John Haanen from the Netherlands Cancer Institute in Amsterdam, said: "This is a retrospective analysis of a relatively small cohort, which is nevertheless one of the largest so far presented, of HIV patients on antiretrovirals treated with immunotherapy for metastatic cancer. The results confirm those of other, smaller cohorts in showing that while on antiretroviral therapy, cancer patients living with HIV can safely receive anti-PD-1 treatment. The efficacy data also suggests that the overall response rate of HIV-positive patients seems to be similar to that of other cancer patients. These promising results need to be confirmed in larger studies - ideally, in a prospective clinical trial."

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Disclaimer This press release contains information provided by the authors of the highlighted abstracts and reflects the content of those abstracts. It does not necessarily reflect the views or opinions of ESMO who cannot be held responsible for the accuracy of the data. Commentators quoted in the press release are required to comply with the ESMO Declaration of Interests policy and the ESMO Code of Conduct.

References

1 Abstract 1213P_PR 'Tolerance and efficacy of immune-checkpoint inhibitors for cancer in people living with HIV (PWHIV)' will be presented by Aurelien Gobert during the Poster Display Session on Saturday, 20 October 2018 12:30 to 13:30 (CEST) in the poster Area - Hall A3. Annals of Oncology, Volume 29 Supplement 8 October 2018
2 Cancer VIH is a French national network that organises bi-monthly multidisciplinary meetings to discuss care and drug therapies for cancer patients living with HIV. Over 500 cases have been presented since its creation in 2015. https://www.cancervih.org/ (in French)
3 A. Gobert et al. HIV and cancer: What's new in 2017? Bulletin du Cancer 2018; https://doi.org/10.1016/j.bulcan.2018.02.002

About the European Society for Medical Oncology (ESMO)

ESMO is the leading professional organisation for medical oncology. With 18,000 members representing oncology professionals from over 150 countries worldwide, ESMO is the society of reference for oncology education and information. ESMO is committed to offer the best care to people with cancer, through fostering integrated cancer care, supporting oncologists in their professional development, and advocating for sustainable cancer care worldwide. Visit http://www.esmo.org

1213P_PR - Tolerance and efficacy of immune-checkpoint inhibitors for cancer in people living with HIV (PWHIV) A. Gobert1, M. Veyri2, A. Lavole;3, H. Montaudite,4, N. Cloarec5, L. Doucet6, V. Gounant7, M-A. Massiani8, C. Helissey9, S. Bregigeon10, C. Chouaid11, C-H. Poulet12, M. Dewolf13, M. Kerjouan14, S. Beaucaire-Danel15, S. Brosseau16, G. Le Garff17, V. Garrait18, A-G. Marcelin19, J-P. Spano20 1Medical Oncology, Groupe Hospitalier Pitie Salpetriere, Paris, France, 2Medical Oncology, Pitie Salpetriere Hospital, Paris, France, 3Pneumology, Hospital Tenon, APHP, Paris, France, 4Department of Dermatology, Nice University Hospital, INSERM, U1065, Centre Mediterraneen de Medecine Moleculaire, Nice, France, 5Hematology and Medical Oncology, CH Avignon, Avignon, France, 6Medical Oncology, Hopital St. Louis, Paris, France, 7Pneumology, Hopital Bichat Claude Bernard, Paris, France, 8Medical Oncology, Institut Curie, Saint-Cloud, France, 9Val de Marne, Begin Military Teaching Hospital, Saint-Mande, France, 10Clinical Immunology and Hematology Center, AP-HM, Marseille, France, 11Chest Department, Centre Hospitalier Intercommunal Creteil, Creteil, France, 12Pneumology, CHU Amiens-Picardie Site Sud, Amiens, France, 13Pneumology, CHU Reims, Reims, France, 14Pneumology, CHU Rennes, Rennes, France, 15Department of Oncology, Institut Curie, Paris, France, 16Pneumlogy, Hopital Bichat Claude Bernard, Paris, France, 17Pneumology, CH Saint Brieuc, Saint Brieuc, France, 18Tropical and Infectious Disease Department, CHIC Creteil, Creteil, France, 19Virology, Groupe Hospitalier Pitie Salpetriere, Paris, France, 20Medical Oncology, Groupe Hospitalier Pitie Salpetriere, Paris, France

Background: Immunotherapy with anti-PD-1/PD-L1 inhibitors represents a breakthrough in cancer treatment. Because PWHIV are usually excluded from clinical trials, tolerance and efficacy data are limited in this population. The French national network CANCERVIH is dedicated to the management of cancer in PWHIV with the organization of the national multidisciplinary meetings ONCOVIH. The objective of this study was to evaluate tolerance and efficacy of nivolumab, an anti-PD-1 inhibitors, in this specific population.

Methods: This study was conducted using the CANCERVIH database. Patients presented in national multidisciplinary meetings since May 2014 were evaluated. Demographic, CD4 lymphocyte count, HIV viral load, tolerance and efficacy data were retrospectively collected from patients treated with nivolumab in daily practice.

Results: Since May 2014, 470 patients have been presented in ONCOVIH national multidisciplinary meetings. Immunotherapy has been proposed for 35 patients and 20 were treated in current practice: 19 (95%) for metastatic non-small cell lung cancer and 1 (5%) for metastatic melanoma. The median CD4 lymphocyte count at diagnosis was 338,5/mm3 (241,3 - 490,5). HIV viral load was undetectable in 17 patients, less than 40 copies/mL in 2 patients and unknown in 1 patient. At the cut-off analysis, with a median follow-up of 10,8 months (1,0 - 27,7), the median number of injections was 6 (3 - 53). No toxic deaths or immune related adverse events have been noted. Only one patient experienced a rising HIV viral load and a decreasing CD4 lymphocyte count but after antiretroviral therapy interruption. On the 17 patients evaluable for response, 4 (24%) had partial response, 2 (12%) had stability and 11 (64%) had disease progression at first evaluation.

Conclusions: Based on these preliminary data, treatment with anti-PD-1 inhibitors seems to be feasible in PWHIV. Antiretroviral therapy should not be interrupted. CD4 lymphocyte count and HIV viral load should be monitored during treatment with immune-checkpoint inhibitors and patients should be included in dedicated clinical trials. Data will be updated at the meeting presentation to better determine tolerance and efficacy of anti-PD-1 inhibitors in this population.

Legal entity responsible for the study: Pitie Salpetriere Hospital.
Funding: Has not received any funding.
Disclosure: J.-P. Spano: Advisory board for Gilead, Merck MSD, Roche, BMS, Novartis, PFD, Leopharma, Janssen.
All other authors have declared no conflicts of interest.

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