The pharmaceutical industry has been as affected as any other industry by the Covid-19 pandemic; most countries’ sites have put clinical trial studies on hold, due to the inability to have dosing and in-person clinic visits for treatment and prevention trials, and pharmaceutical companies are shifting their overall priorities away from some current indications, such as those focusing on Alzheimer’s disease, toward Covid-19, according to GlobalData, a leading data and analytics company.

In the Alzheimer’s pipeline, 19 drugs are in Phase III, 37 are in Phase II, and 38 are in Phase I of development. Targeting Aβ is the favored mechanism of action for disease-modifying therapies (DMTs) in the mid- and late-stage trials; currently, six of these drugs are in Phase III, including Roche’s gantenerumab, Biogen’s aducanumab, and Eisai’s BAN-2401, and six DMTs are in Phase II including Eli Lilly’s donanemab and Alzheon’s ALZ-801.

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Not all pharmaceutical companies have been responding in the same way to the Covid-19 pandemic as Roche, for example, continues both enrolment and dosing in the company’s Alzheimer’s late-stage trial of gantenerumab. On the other hand, Eli Lilly, which has several Alzheimer’s drugs in the pipeline—including solanezumab, in a Phase III trial for older individuals who may be at risk for memory loss—is halting enrollment and postponing new trials while continuing dosing in ongoing trials.

Axsome Therapeutics concluded patient participation early in the Phase III study of its lead drug candidate, AXS-05, in patients with Alzheimer’s agitation. The company already completed randomising hundreds of patients for both the AXS-05 and placebo arms, and more than 90% of patients enrolled had completed the five weeks of the study. The decision to accelerate the completion of this trial was made using the FDA’s Guidance on Conduct of Clinical Trials of Medical Products during Covid-19 Pandemic, which discusses the potential impact of the pandemic on the conduct of clinical trials and on the resulting need to ensure the safety of trial participants. With the acceleration of the trial, top-line results are expected in June 2020.

Conversely, Biogen was expected to complete FDA filing for its recombinant human monoclonal antibody (mAb) aducanumab in early 2020, but due to the coronavirus that affected several members of senior management, the regulatory filing and review is expected to take more time than originally estimated. Biogen also launched a new trial called EMBARK for people who were enrolled in Phase III trials of aducanumab at the Advanced Memory Centre. Due to Covid-19, the launch of the trial in other sites will not happen at least until June 2020.

With the current situation of lockdown in most of the countries, people ages65 and older are not able to participate in clinical trials. However, physicians are staying in contact with their participants and carers through remote technology. The research can still continue as researchers can collect and analyze some clinical and cognitive data. The disruption of important clinical research by the Covid-19 pandemic is linked also to the particular vulnerability of the older adults, the most targeted subjects by Covid-19. The number of deaths in the elderly population worldwide has already reached significant numbers, and participants of Alzheimer’s trials dying from coronavirus can significantly affect the outcome of Alzheimer’s studies.

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To mitigate the disruption of Alzheimer’s clinical trials due to Covid-19, new interventions need to be implemented due to the inability to leave home. With the new technologies available, researchers and physicians can remotely screen potential participants rather than conducting in-person visits and support their families and carers during these difficult and uncertain times.