Comparative Risk of Incident Cancer in Patients with Inflammatory Bowel Disease with Prior Non-digestive Malignancy According to Immunomodulator: a Multicentre Cohort Study

Risk of Cancer Recurrence in Patients With Immune-Mediated Diseases With Use of Immunosuppressive Therapies: An Updated Systematic Review and Meta-Analysis

BACKGROUND & AIMS

There are limited data on the safety of immunosuppressive therapy use in individuals with immune-mediated diseases with a history of malignancy, particularly with newer biologic and small-molecule treatments.

METHODS

We performed a systematic search of PubMed and Embase databases to identify studies examining the impact of immunosuppressive therapies on cancer recurrence across several immune-mediated diseases. Studies were pooled together using random-effects meta-analysis and stratified by type of treatment. Primary outcome was occurrence of incident cancers, defined as new or recurrent.

RESULTS

Our meta-analysis included 31 studies (17 inflammatory bowel disease, 14 rheumatoid arthritis, 2 psoriasis, and 1 ankylosing spondylitis) contributing 24,328 persons and 85,784 person-years (p-y) of follow-up evaluation. Rates of cancer recurrence were similar among individuals not on immunosuppression (IS) (1627 incident cancers, 43,765 p-y; 35 per 1000 p-y; 95% CI, 27-43), receiving an anti-tumor necrosis factor (571 incident cancers, 17,772 p-y; 32 per 1000 p-y; 95% CI, 25-38), immunomodulators (1104 incident cancers, 17,018 p-y; 46 per 1000 p-y; 95% CI, 31-61), combination immunosuppression (179 incident cancers, 2659 p-y; 56 per 1000 p-y; 95% CI, 31-81). Patients receiving ustekinumab (5 incident cancers, 213 p-y; 21 per 1000 p-y; 95% CI, 0-44) and vedolizumab (37 incident cancers, 1951 p-y; 16 per 1000 p-y; 95% CI, 5-26) had numerically lower rates of cancer. There were no studies on Janus kinase inhibitors. Stratification of studies by timing of immunosuppression initiation did not reveal a medication effect based on early (<5 years) or delayed treatment initiation.

CONCLUSIONS

In patients with immune-mediated diseases and a history of malignancy, we observed similar rates of cancer recurrence in those on no immunosuppression compared with different immunosuppressive treatments.

The 2023 Impact of Inflammatory Bowel Disease in Canada: Cancer and IBD

Cancer is a major cause of morbidity and mortality among people with inflammatory bowel disease (IBD). Intestinal cancers may arise as a complication of IBD itself, while extra-intestinal cancers may arise due to some of the immunosuppressive therapies used to treat IBD. Colorectal cancer (CRC) and small bowel cancer risks remain elevated among persons with IBD as compared to age-and sex-matched members of the general population, and the lifetime risk of these cancers is strongly correlated to cumulative intestinal inflammatory burden. However, the cumulative risk of cancer, even among those with IBD is still low. Some studies suggest that IBD-CRC incidence has declined over the years, possibly owing to improved treatment standards and improved detection and management of early neoplastic lesions. Across studies of extra-intestinal cancers, there are generally higher incidences of melanoma, hepatobiliary cancer, and lung cancer and no higher incidences of breast cancer or prostate cancer, with equivocal risk of cervical cancer, among persons with IBD. While the relative risks of some extra-intestinal cancers are increased with treatment, the absolute risks of these cancers remain low and the decision to forego treatment in light of these risks should be carefully weighed against the increased risks of intestinal cancers and other disease-related complications with undertreated inflammatory disease. Quality improvement efforts should focus on optimized surveillance of cancers for which surveillance strategies exist (colorectal cancer, hepatobiliary cancer, cervical cancers, and skin cancers) and the development of cost-effective surveillance strategies for less common cancers associated with IBD.

Crohn's disease and breast cancer: a literature review of the mechanisms and treatment

This is a literature review describes Crohn's disease (CD) concomitant with breast cancer and summarizes possible common pathogenic mechanisms shared by the two diseases involving the IL-17 and NF-κB signaling pathways. Inflammatory cytokines including TNF-α and Th17 cells in CD patients can induce activation of the ERK1/2, NF-κB and Bcl-2 pathways. Hub genes are involved in the generation of cancer stem cells (CSCs) and are related to inflammatory mediators, including CXCL8, IL1-β and PTGS2, which promote inflammation and breast cancer growth, metastasis, and development. CD activity is highly associated with altered intestinal microbiota processes, including secretion of complex glucose polysaccharides by Ruminococcus gnavus colonies; furthermore, γ-proteobacteria and Clostridium are associated with CD recurrence and active CD, while Ruminococcaceae, Faecococcus and Vibrio desulfuris are associated with CD remission. Intestinal microbiota disorder promotes breast cancer occurrence and development. Bacteroides fragilis can produce toxins that induce breast epithelial hyperplasia and breast cancer growth and metastasis. Gut microbiota regulation can also improve chemotherapy and immunotherapy efficacy in breast cancer treatment. Intestinal inflammation can affects the brain through the brain-gut axis, which activates the hypothalamic‒pituitary‒adrenal (HPA) axis to induce anxiety and depression in patients; these effects can inhibit the antitumor immune responses of the immune system and promote breast cancer occurrence in patients with CD. There are few studies on the treatment of patients with CD concomitant with breast cancer, but published studies show three main strategies: new biological agents combined with breast cancer treatment methods, intestinal fecal bacteria transplantation, and dietary treatment.

Extraintestinal Cancers in Inflammatory Bowel Disease: A Literature Review

BACKGROUND

Inflammatory bowel disease (IBD) is a group of chronic multifactorial inflammatory disorders including two major entities: Crohn's disease (CD) and ulcerative colitis (UC). Preliminary evidence suggests that patients with IBD may be at increased risk of developing intestinal and extraintestinal cancers (EICs). Actually, little is known about the association between IBD and EICs, and there is ever-growing concern regarding the safety of immunomodulators and biological therapy, which may represent a risk factor for carcinogenesis.

AIMS

The aim of this review is to summarize the evidence regarding the association between IBD and EICs, the safety of immunomodulators and biological therapy and the management of immunomodulators and biologic agents in IBD patients with prior or current EICs.

RESULTS

IBD patients have a higher risk of developing different forms of extraintestinal solid organ tumors and hematological malignancies. Immunomodulators and biological therapy may increase the risk of developing some types of EICs and may be consciously used in patients with IBD and current or prior history of malignancy.

CONCLUSIONS

Decisions regarding the use of immunomodulators or biological therapies should be made on an individual basis, considering a multidisciplinary approach involving oncologists.

An update on the safety of long-term vedolizumab use in inflammatory bowel disease

INTRODUCTION

Vedolizumab (Entyvio) is a humanized monoclonal antibody that disrupts the interaction between α4β7 integrin on circulating T-lymphocytes and MAdCAM-1 on the vascular endothelium to prevent their egress to sites of gut inflammation. It has proven therapeutic efficacy for the treatment of moderate-to-severe Crohn's disease, ulcerative colitis, and pouchitis.

AREAS COVERED

This narrative review assesses the safety profile of vedolizumab from the registration trial programs, open-label extension studies, observational real-world data, and pooled safety analyses. This includes an evaluation of the long-term overall safety in special populations typically underrepresented in clinical trials.

EXPERT OPINION

Vedolizumab is an effective therapy for inflammatory bowel disease with a well-established safety profile. No unexpected long-term safety signals have been identified. Safety data in pregnancy, in pediatric and elderly populations, in patients undergoing surgery, and in patients with a prior history of cancer are reassuring. Due to its safety merits, we propose that vedolizumab is an excellent candidate for advanced combination treatment with an anti-cytokine approach using another biologic or novel small molecule inhibitor. This is important in patients with medically refractory IBD, in patients at high risk of developing disease-related complications, or in patients with concomitant uncontrolled immune-mediated inflammatory diseases.

Comparative Safety of Biologic Agents in Patients With Inflammatory Bowel Disease With Active or Recent Malignancy: A Multi-Center Cohort Study

BACKGROUND & AIMS

Safety of biologic agents is a key consideration in patients with inflammatory bowel disease (IBD) and active or recent cancer. We compared the safety of tumor necrosis factor (TNF)-α antagonists vs non-TNF biologics in patients with IBD with active or recent cancer.

METHODS

We conducted a multicenter retrospective cohort study of patients with IBD and either active cancer (cohort A) or recent prior cancer (within ≤5 years; cohort B) who were treated with TNFα antagonists or non-TNF biologics after their cancer diagnosis. Primary outcomes were progression-free survival (cohort A) or recurrence-free survival (cohort B). Safety was compared using inverse probability of treatment weighting with propensity scores.

RESULTS

In cohort A, of 125 patients (483.8 person-years of follow-up evaluation) with active cancer (age, 54 ± 15 y, 75% solid-organ malignancy), 10 of 55 (incidence rate [IR] per 100 py, 4.4) and 9 of 40 (IR, 10.4) patients treated with TNFα antagonists and non-TNF biologics had cancer progression, respectively. There was no difference in the risk of progression-free survival between TNFα antagonists vs non-TNF biologics (hazard ratio, 0.76; 95% CI, 0.25-2.30). In cohort B, of 170 patients (513 person-years of follow-up evaluation) with recent prior cancer (age, 53 ± 15 y, 84% solid-organ malignancy; duration of remission, 19 ± 19 mo), 8 of 78 (IR, 3.4) and 5 of 66 (IR 3.7) patients treated with TNFα antagonists and non-TNF biologics had cancer recurrence, respectively. The risk of recurrence-free survival was similar between both groups (hazard ratio, 0.94; 95% CI, 0.24-3.77).

CONCLUSIONS

In patients with IBD with active or recent cancer, TNFα antagonists and non-TNF biologics have comparable safety. The choice of biologic should be dictated by IBD disease severity in collaboration with an oncologist.

The Optimal Management of Inflammatory Bowel Disease in Patients with Cancer

Patients with inflammatory bowel disease (IBD) have an increased risk of cancer secondary to chronic inflammation and long-term use of immunosuppressive therapy. With the aging IBD population, the prevalence of cancer in IBD patients is increasing. As a result, there is increasing concern about the impact of IBD therapy on cancer risk and survival, as well as the effects of cancer therapies on the disease course of IBD. Managing IBD in patients with current or previous cancer is challenging since clinical guidelines are based mainly on expert consensus. Evidence is rare and mainly available from registries or observational studies. In contrast, excluding patients with previous/or active cancer from clinical trials and short-term follow-up can lead to an underestimation of the cancer or cancer recurrence risk of approved medications. The present narrative review aims to summarize the current evidence and provide practical guidance on the management of IBD patients with cancer.

Management of Inflammatory Bowel Disease in Patients with Current or Past Malignancy

Immunomodulators, conventional immunosuppressants, and/or biologics are used more often, earlier, and longer than before in patients with inflammatory bowel disease (IBD). Along with this, the lifetime risk for cancer is estimated to be 33% in the general population in Europe. Thus, physicians face therapeutic choices in an increasing number of IBD patients with current or past malignancy. Few data are available so far for managing this IBD subpopulation and this clinical concern still remains a critical situation for four reasons: (i) risk of reactivation of dormant micrometastasis with immunomodulators is of major concern, (ii) there is a knowledge gap about the safety of the most recent molecules, (iii) current guidelines do not recommend the use of immunomodulators within 2-5 years after a diagnosis of cancer, (iv) patients with previous cancers are excluded from clinical trials. There is a lack of scientific evidence supporting the non-use of immunomodulators in IBD patients with previous cancer. Indeed, accumulative data suggest that the risk for recurrent and new cancer in patients with a history of cancer is not increased by thiopurines and anti-TNF agents. Most recently, cohort studies have found no differences in incident cancer rates in IBD patients with prior malignancy treated with vedolizumab or ustekinumab compared to those treated with anti-TNF agents. Therefore, decisions should be shared by the oncologist and the patient, considering the natural history of cancer, the time elapsed since cancer diagnosis, and IBD prognosis.

Therapeutic Management of Adults with Inflammatory Bowel Disease and Malignancies: A Clinical Challenge

Patients with chronic inflammatory bowel diseases (IBD) have increased risk of developing intestinal and extraintestinal cancers. However, once a diagnosis of malignancy is made, the therapeutic management of Crohn's disease (CD) and ulcerative colitis (UC) can be challenging as major guidelines suggest discontinuing the ongoing immunosuppressant and biological therapies for at least 2-5 years after the end of cancer treatment. Recently, new molecules such as vedolizumab and ustekinumab have been approved for IBD and limited data exist on the real risk of new or recurrent cancer in IBD patients with prior cancer, exposed to immunosuppressants and biologic agents. Thus, a multidisciplinary approach and case-by-case management is the preferred choice. The primary aim of our review was to summarize the current evidence about the safety of reintroducing an immunosuppressant or biologic agent in patients with a history of malignancy and to compare the different available therapies, including gut-selective agents. The secondary aim was to evaluate the clinical course of the IBD patients under cancer treatment who do not receive any specific immunosuppressant treatment after the diagnosis of cancer.