MiNK Therapeutics (INKT) Risk Analysis

Preclinical and clinical drug development is expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the preclinical study or clinical trial process. Despite promising preclinical or clinical results, any product candidate can unexpectedly fail at any stage of preclinical or clinical development. A number of companies in the pharmaceutical and biotechnology industries have suffered significant setbacks in clinical development even after achieving promising results in earlier studies, and the historical failure rate for product candidates in our industry is high. The results from preclinical studies or early clinical trials of a product candidate may not predict the results of later clinical trials of the product candidate, and interim results of a clinical trial are not necessarily indicative of final results. Product candidates in later stages of clinical trials may fail to show the desired safety and efficacy characteristics despite having progressed through preclinical studies and initial clinical trials. In particular, while we have conducted certain clinical studies evaluating agenT-797, we do not know whether our product candidates will perform similarly in future clinical trials. It is not uncommon to observe results in clinical trials that are unexpected based on preclinical studies and early clinical trials, and many product candidates fail in clinical trials despite very promising early results. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses. For the foregoing reasons, we cannot be certain that our ongoing and planned clinical trials and preclinical studies will be successful. Any safety concerns observed in any one of our clinical trials in our targeted indications could limit the prospects for marketing approval of our product candidates in those and other indications, which could have a material adverse effect on our business, financial condition and results of operations.

We have concentrated our research and development efforts on utilizing allogeneic iNKT cells as a potential immunotherapy. To date, the FDA has approved only a few adoptive cell therapies for commercialization and no allogeneic iNKT cell therapy has been approved for commercial use by any regulatory authority. The processes and requirements imposed by the FDA or other applicable regulatory authorities may cause delays and additional costs in obtaining approvals for marketing authorization for our product candidates. Because our allogeneic iNKT cell platform product candidates are novel, and adoptive cell therapies are relatively new, regulatory agencies may lack experience in evaluating product candidates like our iNKT cell product candidates, including our lead product candidate, agenT-797. This novelty may heighten regulatory scrutiny of our therapies or lengthen the regulatory review process, including the time it takes for the FDA to review our INDs if and when submitted, increase our development costs and delay or prevent commercialization of our allogeneic iNKT cell platform products. Additionally, advancing novel cell therapies involve significant challenges for us, including: - educating medical personnel regarding the potential side-effect profile of our product candidates and, as the clinical program progresses, on observed side effects with the therapy;- training a sufficient number of medical personnel on how to properly administer our product candidates;- enrolling sufficient numbers of patients in clinical trials;- developing a reliable, safe and effective means of genetically modifying certain of our cells;- establishing a cost-effective and large-scale manufacturing capacity suitable for the manufacture of our product candidates in line with expanding enrollment in our clinical trials and our projected commercial requirements;- sourcing starting material suitable for clinical and commercial manufacturing; and - establishing sales and marketing capabilities to successfully launch and commercialize our product candidates if and when we obtain any required marketing approvals, and risks associated with gaining market acceptance of a novel therapy if we receive approval, as well as developing a manufacturing process and distribution network to support the commercialization of any approved products. We must be able to overcome these challenges in order for us to develop, commercialize and manufacture our product candidates utilizing allogeneic iNKT cells. Failure to do so could materially adversely affect our business, financial condition, results of operations and growth prospects.

Our ability to generate product revenues, which we do not expect will occur for many years, if ever, will depend heavily on the successful development and eventual commercialization of our agenT-797 and our other product candidates. We cannot guarantee that agenT-797, will demonstrate the degree of safety, purity, potency, or efficacy required by the FDA or other regulatory authorities, or will be approved for commercialization on a timely basis or at all. Although certain of our employees and consultants have prior experience with clinical trials, marketing approvals and current Good Manufacturing Practice ("cGMP") compliance, we have not previously completed any pivotal clinical trials or submitted a Biologics License Application ("BLA") to the FDA, or similar marketing approval applications to comparable foreign authorities, for any product candidate, and we cannot be certain that agenT-797 or any other product candidate will be successful in clinical trials or receive marketing approval. The success of our product candidates will depend on several factors, including the following: - successful initiation and completion of preclinical studies with favorable results, including toxicology and other studies designed to be compliant with good laboratory practice ("GLP"), requirements;- allowance to proceed with clinical trials under Investigational New Drug applications ("INDs"), by the FDA, or of similar regulatory submissions by comparable foreign regulatory authorities for the conduct of clinical trials of our product candidates;- successful initiation, enrollment and completion of clinical studies in accordance with good clinical practice ("GCP"), requirements and other applicable rules and regulations;- the frequency and severity of adverse events observed in clinical trials;- maintaining and establishing relationships with contract research organizations ("CROs"), and clinical sites for the clinical development of our product candidates;- demonstrating the safety purity, and potency, or efficacy of our product candidates to the satisfaction of the FDA and other applicable regulatory authorities;- receipt of marketing approvals from applicable regulatory authorities, including approvals of BLAs from the FDA, and maintaining any such approvals;- making arrangements with third-party manufacturers for, or establishing, clinical or commercial manufacturing capabilities;- establishing sales, marketing and distribution capabilities and launching commercial sales of our product candidates, if and when approved, either alone or in collaboration with others;- obtaining, establishing and maintaining patent and trade secret protection or regulatory exclusivity for our product candidates;- maintaining an acceptable safety profile of our product candidates following marketing approval, if any;- maintaining and growing an organization of people who can develop and, if approved, commercialize, market and sell our product candidates, if approved; and - acceptance of our product candidates, if approved, by patients, the medical community and third-party payors. Furthermore, because agenT-797 is our most advanced product candidate and our only product candidate in clinical development , and because our other product candidates are based on similar technology, if our clinical trials of agenT-797 encounter safety, efficacy or manufacturing problems, development delays, regulatory issues or other problems, our development plans for agenT-797 and our other product candidates in our pipeline could be significantly impaired, which could materially adversely affect our business, financial condition, results of operations and growth prospects. The success of our business, including our ability to finance our company and generate any revenue in the future, will primarily depend on the successful development, marketing approval and commercialization of agenT-797 and our other product candidates, which may never occur. In the future, we may also become dependent on other product candidates that we may develop or acquire; however, given our stage of development, it may be several years, if at all, before we have demonstrated the safety, purity, and potency (or efficacy) of a candidate sufficient to warrant approval for commercialization. If we are unable to develop, or obtain marketing approval for, or, if approved, successfully commercialize our product candidates, we may not be able to generate sufficient revenue to continue our business.

Regulatory authorities in some jurisdictions, including the U.S., may designate biologics or drugs designed to address relatively small patient populations as "orphan drugs." Under the Orphan Drug Act, the FDA may grant orphan drug designation to a drug or biologic intended to treat a rare disease or condition, which is defined as one occurring in a patient population of fewer than 200,000 in the United States, or a patient population greater than 200,000 in the United States, where there is no reasonable expectation that the cost of developing the drug or biologic will be recovered from sales in the United States. In the U.S., orphan designation entitles a party to financial incentives such as opportunities for grant funding for clinical trial costs, tax advantages and user-fee waivers. In addition, if a product candidate that has orphan designation subsequently receives the first FDA approval for the disease or condition for which it has such designation, the product is entitled to orphan drug exclusivity, which means that the FDA may not approve any other applications, including an NDA, to market the same drug for the same approved use or indication within such rare disease or condition for seven years, except in limited circumstances.. We may seek Orphan Drug Designations for agenT-797 or for our other product candidates. There can be no assurances that we will be able to obtain such designations. Even if we, or any future collaborators, obtain orphan drug designation for a product candidate, we, or they, may not be able to obtain or maintain orphan drug exclusivity for that product candidate. Further, even if we, or any future collaborators, obtain orphan drug exclusivity for a product, that exclusivity may not effectively protect the product from competition because different drugs with different active ingredients may be approved for the same uses or indications. Even after an orphan drug is approved, the FDA can subsequently approve the same drug for the same use or indication within the same rare disease or condition if the FDA concludes that the later drug is clinically superior in that it is shown to be safer, more effective or makes a major contribution to patient care with respect to the exclusivity-protected use or indication, or if the manufacturer of the product with orphan exclusivity is unable to maintain sufficient product quantity to meet the needs relating to the relevant indication or use. Orphan drug designation neither shortens the development or regulatory review time of a drug nor gives the drug any advantage in the regulatory review or approval process.

We may choose to conduct one or more of our clinical trials or a portion of our clinical trials for our product candidates outside the U.S. The acceptance of study data from clinical trials conducted outside the U.S. or another jurisdiction by the FDA or comparable foreign regulatory authority may be subject to certain conditions or may not be accepted at all. In cases where data from foreign clinical trials are intended to serve as the sole basis for marketing approval in the U.S., the FDA will generally not approve the application on the basis of foreign data alone unless (i) the data are applicable to the U.S. population and U.S. medical practice; (ii) the trials were performed by clinical investigators of recognized competence and pursuant to GCP regulations; and (iii) the data may be considered valid without the need for an on-site inspection by the FDA, or if the FDA considers such inspection to be necessary, the FDA is able to validate the data through an on-site inspection or other appropriate means. In addition, even where the foreign study data are not intended to serve as the sole basis for approval, if the study was not otherwise subject to an IND, the FDA will not accept the data as support for an application for marketing approval unless the study is well-designed and well-conducted in accordance with GCP requirements and the FDA is able to validate the data from the study through an onsite inspection if deemed necessary. Many foreign regulatory authorities have similar requirements for clinical data gathered outside of their respective jurisdictions. In addition, such foreign trials would be subject to the applicable local laws of the foreign jurisdictions where the trials are conducted. There can be no assurance that the FDA or any comparable foreign regulatory authority will accept data from trials conducted outside of the U.S. or the relevant jurisdiction. If the FDA or any comparable foreign regulatory authority does not accept such data, it may result in the need for additional trials, which could be costly and time-consuming, and which may result in current or future product candidates that we may develop not receiving approval for commercialization in the applicable jurisdiction.

We intend to develop agenT-797 and our other product candidates for use in combination with one or more existing therapies. Even if any product candidate we develop was to receive marketing approval or be commercialized for use in combination with other existing therapies, we would continue to bear the risks that the FDA or similar foreign regulatory authorities could revoke approval of the therapy used in combination with our product candidate or that safety, efficacy, manufacturing, or supply issues could arise with these existing therapies. Developing combination therapies using approved therapeutics, as we plan to do for our product candidates, also exposes us to additional clinical risks, such as the requirement that we demonstrate the safety and efficacy of each active component of any combination regimen we may develop. If the FDA or similar foreign regulatory authorities revoke the approval of combination agents, or if safety, efficacy, manufacturing, or supply issues arise with the drugs we choose to evaluate in combination with our product candidates, we may be unable to obtain approval of or market our product candidates for combination therapy regimens. Additionally, if the third-party providers of therapies or therapies in development used in combination with our product candidates are unable to produce sufficient quantities for clinical trials or for commercialization of our product candidates, if approved, or if the cost of combination therapies are prohibitive, our development and commercialization efforts would be impaired, which would have an adverse effect on our business, financial condition, results of operations, and prospects.

From time to time, we may publicly disclose interim, topline, or preliminary data from our clinical trials and preclinical studies, which is based on a preliminary analysis of then-available data, and the results and related findings and conclusions are subject to change following a more comprehensive review of the data related to the particular study or trial. We also make assumptions, estimations, calculations and conclusions as part of our analyses of data, and we may not have received or had the opportunity to fully and carefully evaluate all data. As a result, the interim, topline, or preliminary results that we report may differ from future results of the same studies or trials, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated. Topline and preliminary data also remain subject to audit and verification procedures that may result in the final data being materially different from the topline or preliminary data we previously published. As a result, topline and preliminary data should be viewed with caution until the final data are available. Interim data from clinical trials are further subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. Adverse differences between interim, topline, or preliminary data and final data could significantly harm our business prospects. Further, disclosure of such data by us or by our competitors could result in volatility in the price of our common stock. Further, others, including regulatory agencies, may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact the value of the particular program, the approvability or commercialization of the particular product candidate or product and our company in general. In addition, the information we choose to publicly disclose regarding a particular study or clinical trial is based on what is typically extensive information, and you or others may not agree with what we determine is material or otherwise appropriate information to include in our disclosure, and any information we determine not to disclose may ultimately be deemed significant with respect to future decisions, conclusions, views, activities or otherwise regarding a particular product candidate or our business. If the interim, topline, or preliminary data that we report differ from actual results, or if others, including regulatory authorities, disagree with the conclusions reached, our ability to obtain approval for, and commercialize, our product candidates may be harmed, which could harm our business, operating results, prospects or financial condition.