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Chimeric antigen receptor T cell therapy (CAR-T) and bispecific T cell engagers (TCE) for multiple myeloma (MM) are readily available at many large US medical centers. However, many potentially eligible patients may not be referred to the specialized centers administering these therapies. Perspectives regarding potential barriers for MM cellular therapy from referring-center oncologists (ROs) versus treating-center oncologists (TOs) have not been reported previously. We conducted TACTUM-23, a survey of US oncologists who treat MM, to identify perceived barriers to these cellular therapies. This 24-question survey, which focused on demographics and perceived barriers to CAR-T and TCE, was conducted between June and August 2023. Of 247 oncologists, 37 (15%) completed the survey including 26 (70%) TOs who prescribed both CAR-T and TCEs, 4 (11%) TOs who only prescribed TCEs, and 7 (19%) ROs who referred patients. The top RO-stated barrier to CAR-T was financial toxicity, while the top TO-stated barrier to CAR-T was leukapheresis/ manufacturing slot availability. The top RO-stated barrier to TCE was financial toxicity, while the top TO-stated barrier to TCE was the hospitalization requirement. In conclusion, financial concerns are perceived by ROs to be the top barrier to both CAR-T and TCEs in myeloma. In contrast, TOs perceive logistical concerns to be the top barrier. Interventions to lower financial toxicity during these therapies, and outreach to raise awareness of such interventions among ROs, are needed alongside strategies to streamline manufacturing (for CAR-T) and monitoring.
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Oncología Médica , Humanos , Anticuerpos Biespecíficos/uso terapéutico , Anticuerpos Biespecíficos/farmacología , Europa (Continente) , Atención Perioperativa/métodos , Sociedades Médicas , Linfocitos T/inmunología , Neoplasias Torácicas/radioterapia , Neoplasias Torácicas/terapia , Neoplasias Torácicas/inmunologíaRESUMEN
Bispecific antibodies (BsAbs) are monoclonal antibodies that simultaneously bind to a specific antigen on tumors and CD3 on T cells, leading to T cell activation and subsequent tumor cell lysis. Several CD20 × CD3 BsAbs are being developed for B-cell lymphomas. Furthermore, multiple clinical trials to evaluate BsAbs for the treatment of multiple myeloma, with targets including BCMA, GPRC5D and FcRH5, are ongoing. Emerging evidence suggests promising efficacy in heavily pretreated patients with relapsed or refractory lymphoid malignancies, showing an overall response rate of 50-60%, with complete response rates of 30-40% for relapsed or refractory large B-cell lymphoma and 60-70% for relapsed or refractory multiple myeloma. Their toxicity profiles are generally consistent with other T-cell redirecting therapies, including cytokine release syndrome, which may be mitigated with several strategies, such as step-up dosing, pre-mediation with glucocorticoids and a subcutaneous route of administration, and very rare neurotoxicity. Several clinical trials evaluated BsAbs in combination with other agents or in earlier lines of treatment, including in front-line settings. BsAbs have the potential to change the treatment paradigm of lymphoid malignancies in the coming years; however, longer follow-ups are required to assess the durability of responses to these agents. We herein provide an overview of the findings of recent clinical trials on BsAbs, including mechanisms of action, safety profiles, and efficacy, and discuss the role of BsAbs in the treatment of B-cell lymphomas and multiple myeloma.
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Anticuerpos Biespecíficos , Linfoma de Células B , Mieloma Múltiple , Humanos , Linfocitos T , Mieloma Múltiple/tratamiento farmacológico , Anticuerpos Monoclonales/uso terapéutico , Anticuerpos Biespecíficos/uso terapéutico , Linfoma de Células B/tratamiento farmacológicoRESUMEN
Oncolytic viruses (OVs) are emerging as therapeutically relevant anticancer agents as contemporary immunotherapy gains traction. Furthermore, OVs are an ideal platform for genetic modification to express therapeutic transgenes. Bispecific T cell engagers (BiTEs) can redirect T cells to tumor cells, resulting in targeted cytotoxicity. BiTEs have demonstrated success in hematological cancers but are rarely used in solid tumors. The drawbacks of BiTEs, including inadequate delivery and on-target-off-tumor activity have limited their efficacy. Combining OVs with BiTEs is a prospective area to investigate. This combined strategy can benefit from the best qualities of both therapies while overcoming the limitations.
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Neoplasias , Viroterapia Oncolítica , Virus Oncolíticos , Humanos , Virus Oncolíticos/genética , Linfocitos T/patología , Viroterapia Oncolítica/métodos , Neoplasias/genética , Neoplasias/terapia , Neoplasias/patología , Inmunoterapia/métodosRESUMEN
To mount appropriate responses, T cells integrate complex sequences of receptor stimuli perceived during transient interactions with antigen-presenting cells. Although it has been hypothesized that the dynamics of these interactions influence the outcome of T cell activation, methodological limitations have hindered its formal demonstration. Here, we have engineered the Light-inducible T cell engager (LiTE) system, a recombinant optogenetics-based molecular tool targeting the T cell receptor (TCR). The LiTE system constitutes a reversible molecular switch displaying exquisite reactivity. As proof of concept, we dissect how specific temporal patterns of TCR stimulation shape T cell activation. We established that CD4+ T cells respond to intermittent TCR stimulation more efficiently than their CD8+ T cells counterparts and provide evidence that distinct sequences of TCR stimulation encode different cytokine programs. Finally, we show that the LiTE system could be exploited to create light-activated bispecific T cell engagers and manipulate tumor cell killing. Overall, the LiTE system provides opportunities to understand how T cells integrate TCR stimulations and to trigger T cell cytotoxicity with high spatiotemporal control.
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Células Presentadoras de Antígenos , Linfocitos T CD8-positivos , Citocinas , Células Epiteliales , Activación de LinfocitosRESUMEN
Cancer is the leading cause of death worldwide. Cancer immunotherapy involves reinvigorating the patient's own immune system to fight against cancer. While novel approaches like Chimeric Antigen Receptor (CAR) T cells, bispecific T cell engagers, and immune checkpoint inhibitors have shown promising efficacy, Cytokine Release Syndrome (CRS) is a serious adverse effect and remains a major concern. CRS is a phenomenon of immune hyperactivation that results in excessive cytokine secretion, and if left unchecked, it may lead to multi-organ failure and death. Here we review the pathophysiology of CRS, its occurrence and management in the context of cancer immunotherapy, and the screening approaches that can be used to assess CRS and de-risk drug discovery earlier in the clinical setting with more predictive pre-clinical data. Furthermore, the review also sheds light on the potential immunotherapeutic approaches that can be used to overcome CRS associated with T cell activation.
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Efectos Colaterales y Reacciones Adversas Relacionados con Medicamentos , Neoplasias , Humanos , Síndrome de Liberación de Citoquinas/etiología , Síndrome de Liberación de Citoquinas/terapia , Descubrimiento de Drogas , Inhibidores de Puntos de Control Inmunológico , Inmunoterapia , Neoplasias/terapiaRESUMEN
Since its FDA approval, chimeric antigen receptor (CAR)-T cell therapy is changing the landscape of the treatment algorithm for relapsed and refractory large cell lymphoma and multiple myeloma. While initially hailed as a game changer and received widely with great enthusiasm, the reality of treatment failure soon became a major disappointment. This situation left patients and clinicians alike wondering about the next treatment options. CAR-T cell therapy failure for aggressive lymphoma or multiple myeloma creates a very poor prognosis and the treatment options are very limited. New emerging data, however, show promise for the use of approaches that include bispecific antibodies and other strategies to rescue affected patients. In this review, we summarize the current emerging data on the treatment options for patients whose disease has relapsed or remains refractory after CAR-T cell therapy failure, an area of great unmet need.
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Linfoma no Hodgkin , Mieloma Múltiple , Receptores Quiméricos de Antígenos , Humanos , Mieloma Múltiple/terapia , Mieloma Múltiple/patología , Linfocitos T , Inmunoterapia Adoptiva/efectos adversos , Tratamiento Basado en Trasplante de Células y TejidosRESUMEN
Over the past decade, immunotherapy has demonstrated an impressive improvement in treatment outcomes for multiple cancers. Following the landmark approvals for use of immune checkpoint inhibitors, new challenges emerged in various clinical settings. Not all tumor types harbor immunogenic characteristics capable of triggering responses. Similarly, many tumors' immune microenvironment allows them to become evasive, leading to resistance and, thus, limiting the durability of responses. To overcome this limitation, new T-cell redirecting strategies such as bispecific T-cell engager (BiTE) have become attractive and promising immunotherapies. Our review provides a comprehensive perspective of the current evidence of BiTE therapies in solid tumors. Considering that immunotherapy has shown modest results in advanced prostate cancer to date, we review the biologic rationale and promising results of BiTE therapy in this clinical setting and discuss potential tumor-associated antigens that may be integrated into BiTE construct designs. Our review also aims to evaluate the advances of BiTE therapies in prostate cancer, illustrate the major obstacles and underlying limitations, and discuss directions for future research.
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Bispecific T cell engagers (bsTCEs) hold great promise for cancer treatment but face challenges due to the induction of cytokine release syndrome (CRS), on-target off-tumor toxicity, and the engagement of immunosuppressive regulatory T cells that limit efficacy. The development of Vγ9Vδ2-T cell engagers may overcome these challenges by combining high therapeutic efficacy with limited toxicity. By linking a CD1d-specific single-domain antibody (VHH) to a Vδ2-TCR-specific VHH, we create a bsTCE with trispecific properties, which engages not only Vγ9Vδ2-T cells but also type 1 NKT cells to CD1d+ tumors and triggers robust proinflammatory cytokine production, effector cell expansion, and target cell lysis in vitro. We show that CD1d is expressed by the majority of patient MM, (myelo)monocytic AML, and CLL cells and that the bsTCE triggers type 1 NKT and Vγ9Vδ2-T cell-mediated antitumor activity against these patient tumor cells and improves survival in in vivo AML, MM, and T-ALL mouse models. Evaluation of a surrogate CD1d-γδ bsTCE in NHPs shows Vγ9Vδ2-T cell engagement and excellent tolerability. Based on these results, CD1d-Vδ2 bsTCE (LAVA-051) is now evaluated in a phase 1/2a study in patients with therapy refractory CLL, MM, or AML.
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Neoplasias Hematológicas , Leucemia Linfocítica Crónica de Células B , Leucemia Mieloide Aguda , Ratones , Animales , Leucemia Linfocítica Crónica de Células B/patología , Linfocitos T Reguladores/patología , Neoplasias Hematológicas/terapiaRESUMEN
Elimination of drug-resistant leukemia stem cells (LSCs) represents a major challenge to achieve a cure in acute myeloid leukemia (AML). Although AML blasts generally retain high levels of surface CD38 (CD38pos), the presence of CD34 and lack of CD38 expression (CD34posCD38neg) are immunophenotypic features of both LSC-enriched AML blasts and normal hematopoietic stem cells (HSCs). We report that IFN-γ induces CD38 upregulation in LSC-enriched CD34posCD38neg AML blasts, but not in CD34posCD38neg HSCs. To leverage the IFN-γ mediated CD38 up-regulation in LSCs for clinical application, we created a compact, single-chain CD38-CD3-T cell engager (CD38-BIONIC) able to direct T cells against CD38pos blasts. Activated CD4pos and CD8pos T cells not only kill AML blasts but also produce IFNγ, which leads to CD38 expression on CD34posCD38neg LSC-enriched blasts. These cells then become CD38-BIONIC targets. The net result is an immune-mediated killing of both CD38neg and CD38pos AML blasts, which culminates in LSC depletion.
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Blinatumomab (Blincyto® injection solution) is classified as a bispecific T-cell engaging (BiTE) antibody and is intended for the treatment of relapsed/refractory acute lymphoblastic leukemia. It requires continuous infusion to maintain therapeutic levels. Therefore, it is often administered at home. Monoclonal antibodies, which are administered intravenously, have the potential to leak depending on the nature of the administration devices. Therefore, we investigated device-associated causes of blinatumomab leakage. We observed no apparent changes to the filter and its materials after exposure to the injection solution and surfactant. From scanning electron microscopic images, precipitate on the surface of the filters was observed after physical stimulation of the injection solution. Therefore, physical stimulations should be avoided during the prolonged administration of blinatumomab. In conclusion, the findings of this study assist in the safe administration of antibodies using portable infusion pumps, taking into consideration the composition of drug excipients and the choice of filter type and structure.
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Anticuerpos Biespecíficos , Antineoplásicos , Leucemia-Linfoma Linfoblástico de Células Precursoras B , Humanos , Antineoplásicos/efectos adversos , Leucemia-Linfoma Linfoblástico de Células Precursoras B/tratamiento farmacológico , Anticuerpos Biespecíficos/efectos adversos , Bombas de InfusiónRESUMEN
T-cell acute lymphoblastic leukemia (T-ALL) is a challenging pediatric and adult haematologic disease still associated with an unsatisfactory cure rate. Unlike B-ALL, the availability of novel therapeutic options to definitively improve the life expectancy for relapsed/resistant patients is poor. Indeed, the shared expression of surface targets among normal and neoplastic T-cells still limits the efficacy and may induce fratricide effects, hampering the use of innovative immunotherapeutic strategies. However, novel monoclonal antibodies, bispecific T-cell engagers (BTCEs), and chimeric antigen receptors (CAR) T-cells recently showed encouraging results and some of them are in an advanced stage of pre-clinical development or are currently under investigation in clinical trials. Here, we review this exciting scenario focusing on most relevant advances, challenges, and perspectives of the emerging landscape of immunotherapy of T-cell malignancies.
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The covalent KRAS-G12C inhibitors (G12Ci) are rapidly changing the treatment landscape for advanced non-small cell lung cancer, but drug resistance remains a clinical challenge. Two recent studies have developed bispecific T cell engagers that form a link between T cells and tumor cells to selectively eliminate G12Ci-resistant cells.
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Carcinoma de Pulmón de Células no Pequeñas , Neoplasias Pulmonares , Humanos , Carcinoma de Pulmón de Células no Pequeñas/tratamiento farmacológico , Neoplasias Pulmonares/tratamiento farmacológico , Proteínas Proto-Oncogénicas p21(ras)/genética , Línea Celular Tumoral , Mutación , Linfocitos TRESUMEN
Following the success of immunotherapies such as chimeric antigen receptor transgenic T-cell (CAR-T) therapy, bispecific T-cell engager therapy, and immune checkpoint inhibitors in the treatment of hematologic malignancies, further studies are underway to improve the efficacy of these immunotherapies and to reduce the complications associated with their use in combination with other immune checkpoint inhibitors and conventional chemotherapy. Studies of novel therapeutic strategies such as bispecific (tandem or dual) CAR-T, bispecific killer cell engager, trispecific killer cell engager, and dual affinity retargeting therapies are also underway. Because of these studies and the discovery of novel immunotherapeutic target molecules, the use of immunotherapy for diseases initially thought to be less promising to treat with this treatment method, such as acute myeloid leukemia and T-cell hematologic tumors, has become a reality. Thus, in this coming era of new transplantation- and chemotherapy-free treatment strategies, it is imperative for both scientists and clinicians to understand the molecular immunity of hematologic malignancies. In this review, we focus on the remarkable development of immunotherapies that could change the prognosis of hematologic diseases. We also review the molecular mechanisms, development processes, clinical efficacies, and problems of new agents.
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Neoplasias Hematológicas , Receptores Quiméricos de Antígenos , Neoplasias Hematológicas/terapia , Humanos , Inhibidores de Puntos de Control Inmunológico , Inmunoterapia/métodos , Inmunoterapia AdoptivaRESUMEN
PURPOSE OF REVIEW: Advances in multiple myeloma therapies have greatly improved outcomes for patients living with the disease, although to date there is yet to be a cure. Cellular and immunotherapies, approved or in development, offer the promise of significantly advancing toward that possibility. The aim of this review is to provide a synopsis and commentary on the current and future states of bispecific agents aimed at harnessing the antineoplastic potential of T-cells in treating and eradicating myeloma. RECENT FINDINGS: Numerous bispecific agents are in clinical development with some on the precipice of regulatory approval. While BCMA remains the principal target, some agents are directed at novel targets such as GPRC5D and FcRH5. The constructs vary in design and pharmacokinetics which has dosing and administration implications. The toxicity profiles of these agents generally reflect that of other immune therapies, including cytokine release syndrome and rarely neurotoxicity, although immunosuppression has also led to elevated infection risks. However, the toxicities are generally manageable and offset by unprecedented efficacy seen in such heavily pretreated cohorts. Bispecific agents are poised to significantly alter the treatment paradigms for myeloma. They provide a convenient "off-the-shelf" platform with often deep and durable responses. Toxicities are often limited in duration and severity. In the early-phase trials, many patients have been able to remain on treatment for extended periods, even among those with high-risk features. Upcoming trials are likely to explore earlier implementation of these agents in order to offer this therapeutic opportunity to broader cohorts.
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Anticuerpos Biespecíficos , Mieloma Múltiple , Humanos , Anticuerpos Biespecíficos/efectos adversos , Mieloma Múltiple/tratamiento farmacológico , Inmunoterapia , Linfocitos TRESUMEN
INTRODUCTION: Immunosenescence is a progressive remodeling of immune functions associated with a decreased ability of the immune system to set up an efficient immune response, both innate and adaptive, with an increase of highly differentiated T cells at the expense of naive T cells. The incidence and prevalence of most cancers increase with age, which can partly be explained by tumor escape mechanisms and decreased immunosurveillance. Aging is also associated with inflammaging, a low-grade proinflammatory state characterized by an increase in inflammatory mediators. Anti-cancer immunotherapy has profoundly changed the landscape of oncology therapy in the last 10 years. Modern T-cell targeted therapies such as bispecific T cell engagers, CAR-T cells, or immune checkpoint blockers may be theoretically affected by immunosenescence or inflammaging. AREAS COVERED: A bibliographic review through PubMed and Embase was carried out using the following search terms: 'immunosenescence,' 'immunotherapy,' 'inflammaging,' 'bispecific antibodies,' 'CAR-T cells,' 'immune checkpoint blockers,' and 'older patients.' EXPERT OPINION: This review explores the potential impact of immunosenescence and inflammaging on anti-cancer immunotherapy and therapeutic strategies that could counter immune senescence. A more dedicated research on immunosenescence biomarkers in future clinical trials is warranted for the development of new, more effective and safer therapies.
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Inmunosenescencia , Neoplasias , Envejecimiento/fisiología , Humanos , Inhibidores de Puntos de Control Inmunológico , Inmunosenescencia/fisiología , Inmunoterapia , Inflamación/terapia , Neoplasias/terapiaRESUMEN
The improved survival rate of ovarian cancer (OC) is related to the action of infiltrating cytotoxic T lymphocytes (CTLs). Recently, oncolytic adenoviruses (OAds) have emerged as a key player in treating solid tumors; however, the immunosuppressive tumor microenvironment (TME) and the body-mediated antiviral immune response limit their therapeutic effect. In this study, we tested the hypothesis that bispecific T-cell engagers (BiTEs) could activate and redirect CTLs to increase the anti-tumor effect of OAds. We modified the parental OAd to express a MUC16-targeting BiTE antibody (OAd-MUC16-BiTE), which retained its oncolytic properties and replication ability in vitro. This BiTE secreted from infected tumor cells into the microenvironment binds to MUC16 on target cells and cross-links them to CD3 on T cells, leading to activation, proliferation, and toxicity of T cells against MUC16+ tumor cells. In cell coculture assays, OAd-MUC16-BiTE-mediated oncolysis enhanced T-cell-mediated tumor cell killing and bystander effect. In ex vivo tumor cultures freshly derived from OC patients, OAd-MUC16-BiTE overcame the suppressed immune TME, achieving stronger toxicity than the parental virus. Moreover, in the cell-derived xenograft and patient-derived xenograft model, OAd-MUC16-BiTE showed stronger antitumor activity and increased the number of CTLs, compared with the parental virus. Further, we demonstrated that the OAd-MUC16-BiTE-mediated anti-tumor activity is related to the reversal of the TME and improved MHC I antigen presentation. Overall, our results show how arming OAds with BiTE can overcome limitations in oncolytic virotherapy, yielding a potent therapy that is ready for clinical assessment.
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Virus Oncolíticos , Neoplasias Ováricas , Adenoviridae/genética , Antígeno Ca-125/metabolismo , Carcinoma Epitelial de Ovario/inmunología , Carcinoma Epitelial de Ovario/terapia , Línea Celular Tumoral , Femenino , Humanos , Inmunidad , Proteínas de la Membrana/metabolismo , Viroterapia Oncolítica , Neoplasias Ováricas/inmunología , Neoplasias Ováricas/terapia , Microambiente Tumoral/inmunologíaRESUMEN
Many protein immunotherapeutics are hindered by transport barriers that prevent the obtainment of minimum effective concentrations (MECs) in solid tumors. Local delivery vehicles with tunable release (infusion) rates for immunotherapeutics are being developed to achieve local and sustained release. To expedite their discovery and translation, in vitro models can identify promising delivery vehicles and immunotherapies that benefit from sustained release by evaluating cancer spheroid killing in real-time. Using displacement affinity release (DAR) within a hydrogel, we tuned the release of a CD133 targeting dual antigen T cell engager (DATE) without the need for further DATE or hydrogel modifications, yielding an injectable vehicle that acts as a tunable infusion pump. To quantify bioactivity benefits, a 3D embedded cancer spheroid model was developed for the evaluation of sustained protein release and combination therapies on T cell mediated spheroid killing. Using automated brightfield and fluorescent microscopy, the size of red fluorescent protein (iRFP670) expressing spheroids were tracked to quantify spheroid growth or killing over time as a function of controlled delivery. We demonstrate that sustained DATE release enhanced T cell mediated killing of embedded glioblastoma spheroids at longer timepoints, killing was further enhanced with the addition of anti-PD1 antibody (αPD1). The multi-cellular embedded spheroid model with automated microscopy demonstrated the benefit of extended bispecific release on T cell mediated killing, which will expedite the identification and translation of delivery vehicles such as DAR for immunotherapeutics.
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Hidrogeles , Neoplasias , Preparaciones de Acción Retardada , Humanos , Inmunoterapia , Esferoides CelularesRESUMEN
Bispecific antibodies are composed of two monoclonal antibodies that engage T cells with tumor cell antigens and lead to tumor cell lysis. The most common types fall into the category of bispecific T cell engagers, or BiTEs, that have the canonical CD3-CD19 bispecific construct. Blinatumomab is the first bispecific antibody that received FDA approval for relapsed refractory B cell precursor acute lymphoblastic leukemia. Blinatumomab has been shown to have robust clinical outcomes and is associated with adverse events such as cytokine release syndrome and neurotoxicity. Other bispecific antibodies are under clinical investigation for multiple myeloma and acute myeloid leukemia. Along with immune checkpoint inhibitors and chimeric antigen T cell receptor therapies, bispecific antibodies are considered a mainstay as a therapeutic option for cancer immunotherapies for Hematologic malignancies.
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Anticuerpos Biespecíficos , Antineoplásicos , Neoplasias Hematológicas , Leucemia-Linfoma Linfoblástico de Células Precursoras , Anticuerpos Biespecíficos/farmacología , Anticuerpos Biespecíficos/uso terapéutico , Antígenos CD19/metabolismo , Antígenos CD19/uso terapéutico , Antígenos de Neoplasias , Antineoplásicos/uso terapéutico , Neoplasias Hematológicas/inducido químicamente , Neoplasias Hematológicas/tratamiento farmacológico , Humanos , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamiento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/patología , Linfocitos TRESUMEN
BACKGROUND: Immunological treatments (immune checkpoint inhibitors [ICIs], chimeric antigen receptor T [CAR-T] cells, bispecific T-cell engagers [BiTEs]) have deeply changed the treatment of several cancers. However, the impact of these treatments on the risk of developing infections has not been completely ascertained yet. METHODS: We reviewed all the registration studies of currently approved ICIs, CAR-T cells, and BiTEs to collect all the reported infections. For each drug, we have generated a report with the infections occurring in at least 10% of the patients enrolled. RESULTS: The most frequently reported infections involving patients treated with ICIs involved the respiratory tract, including nasopharyngitis, upper respiratory tract infections, and pneumonia and the urinary tract. Those treated with CAR-T cells frequently reported the incidence of unspecified infections and infestations, bacterial infections, and viral infections. In patients treated with BiTEs, nasopharyngitis, pneumonia, and device-related infections were the most frequently reported conditions. CONCLUSIONS: A wide range of infections are reported in registration studies and clinical trials of ICIs, CAR-T cells, and BiTEs.