Clene Announces Initiation of a Second FDA Expanded Access Program with CNM-Au8 for People Living with Amyotrophic Lateral Sclerosis

Clene Announces Initiation of a Second FDA Expanded

CNM-Au8 for People Living with Amyotrophic Lateral Sclerosis

SALT LAKE CITY, September 23, 2021 -- Clene Inc. (NASDAQ: CLNN)

along with its subsidiaries "Clene" and its wholly owned subsidiary Clene Nanomedicine, Inc., a clinical-stage biopharmaceutical

company dedicated to the treatment of neurodegenerative disease using nanotechnology to treat cellular energetic failure, announced the

launch of a second U.S. Food and Drug Administration (FDA) expanded access program (CNMAu8.EAP02) with CNM-Au8 for people living with

amyotrophic lateral sclerosis (ALS).

This expanded access program will be implemented in conjunction with

the Healey ALS Platform Trial, a registration trial in which CNM-Au8 , a catalytically-active gold nanocrystal suspension, is currently

being evaluated for the treatment of ALS, with topline results expected mid-2022. The Healey ALS Platform trial is led by Dr. Merit Cudkowicz,

Director of the Sean M. Healey & AMG Center for ALS, Chief of the Department of Neurology at Massachusetts General Hospital (MGH)

and the Julieanne Dorn Professor of Neurology at Harvard Medical School, and her team. The expanded access program is designed to provide

people with ALS who are not eligible to enroll in the Healey ALS Platform Trial access to CNM-Au8, an investigational cellular energetic

catalyst that supports energy production.

The Healey Center will support the expanded access program at three

participating clinical trial sites in the Healey ALS Platform Trial. CNMAu8.EAP02 will enroll participants across three sites. The first

two sites to be included are the Holy Cross Hospital in Fort Lauderdale, Florida and the Hospital for Special Care in New Britain, Connecticut.

Robert Glanzman, MD, FAAN, Clene's Chief Medical Officer, commented,

"We are honored to be collaborating with the Healey Center for ALS in this critically important effort of providing access to CNM-Au8

to people with ALS who may benefit. The Healey Center is an outstanding partner, and we proudly share its goal of developing lifesaving

therapies for the treatment of ALS."

CNMAu8.EAP02 is the second expanded access program with CNM-Au8 that

Clene is currently supporting for people with ALS. The initial expanded access program (CNMAu8.EAP01) was also launched in partnership

with the Sean M. Healey & AMG Center for ALS at MGH and presently supports access to CNM-Au8 for 40 people living with ALS. CNMAu8.EAP01

started enrolling participants in September 2019 with long-term participants now treated for over 100 weeks.

"While CNM-Au8 advances through the registration platform trial

with an aim to become available to all patients with ALS, expanded access programs enable more people with ALS to benefit today from the

potential of our first-in-class neuroreparative energetic nanotherapeutic. Clene is committed to supporting communities living with devastating

neurodegenerative diseases, and we are doing our utmost each day to reach and treat more patients," stated Rob Etherington, Clene's

About Amyotrophic Lateral Sclerosis (ALS)

ALS is a universally fatal neurodegenerative disorder that results

in loss of motor neurons in the cerebral cortex, brain stem, and spinal cord. ALS (also known as Lou Gehrig's disease) leads to

the death of the neurons controlling voluntary muscles resulting in weakness, muscle atrophy, and progressive paralysis. ALS affects more

than 15,000 patients in the United States and is the most prevalent adult-onset progressive motor neuron disease.

About the HEALEY-ALS Platform Trial

The HEALEY ALS Platform Trial is led by a panel of expert amyotrophic

lateral sclerosis (ALS) scientists. This breakthrough trial, the first ever platform trial for the treatment of ALS, is designed to reduce

trial time, reduce costs and increase patient participation in developing novel therapies for ALS. The trial includes substantial financial

support from philanthropic donors and foundations, and presently involves more than 50 expert ALS clinical trial sites across the United

Clene's lead drug candidate, CNM-Au8, is an aqueous suspension

of catalytically-active, clean-surfaced, faceted gold nanocrystals. Resulting from a patented manufacturing breakthrough, the catalytically

active nanocrystals of CNM-Au8 drive critical cellular energy producing reactions in the brain that enable neurorepair and remyelination

by increasing neuronal and glial resilience to disease-relevant stressors. CNM-Au8 crosses the blood-brain barrier and is not associated

with the toxicities related to synthetic gold compounds or nanoparticles manufactured via alternative methods. CNM-Au8 has demonstrated

safety in Phase 1 studies in healthy volunteers and has shown both remyelination and neuroprotective effects in multiple preclinical (animal)

models. Preclinical data, both published in peer-reviewed journals and presented at scientific congresses, demonstrate that treatment

of neuronal cultures with CNM-Au8 improves survival of neurons, protects neurite networks, decreases intracellular levels of reactive

oxygen species, and improves mitochondrial capacity in response to cellular stresses induced by numerous disease-relevant neurotoxins.

Oral treatment with CNM-Au8 improved functional behaviors in rodent models of ALS, MS, and PD versus vehicle (placebo). CNM-Au8

is a federally registered trademark of Clene Nanomedicine, Inc.

Clene, a clinical-stage biopharmaceutical company focused on neurodegenerative

disease treatments, is leading the way by using nanotechnology to treat energetic failure, which underlies many neurological diseases.

Clene has innovated a novel nanotherapeutic platform to create a new class of drugs. Clene's lead drug candidate, CNM-Au8, is an

aqueous suspension of catalytically-active, clean-surfaced, faceted gold nanocrystals that drive critical cellular energetic metabolism

in the central nervous system (CNS). CNM-Au8 increases cellular energy production to accelerate neurorepair and improve neuroprotection.

CNM-Au8 is currently being evaluated in a registration enabling trial in amyotrophic lateral sclerosis (ALS), a Phase 2 trial examining

disease progression via a novel electrophysiology technique in patients with early ALS, a Phase 2 trial for the treatment of chronic optic

neuropathy in patients with stable relapsing multiple sclerosis (MS), and Phase 2 brain target engagement studies in patients with Parkinson's

disease (PD) and MS. Clene has also advanced into the clinic an aqueous solution of ionic zinc and silver for anti-viral and anti-microbial

uses. The company is based in Salt Lake City, Utah with R&D and manufacturing operations in Maryland. For more information, please

Forward-Looking Statements

This press release contains "forward-looking

statements" within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995.

Clene's actual results may differ from its expectations, estimates and projections and consequently, you should not rely on these forward-looking

statements as predictions of future events. Words such as "expect," "estimate," "project," "budget,"

"forecast," "anticipate," "intend," "plan," "may," "will," "could,"

"should," "believes," "predicts," "potential," "might" and "continues," and

similar expressions are intended to identify such forward-looking statements. These forward-looking statements involve significant known

and unknown risks and uncertainties, many of which are beyond Clene's control and could cause actual results to differ materially

and adversely from expected results. Factors that may cause such differences include Clene's ability to demonstrate the efficacy

and safety of its drug candidates; the clinical results for its drug candidates, which may not support further development or marketing

approval; actions of regulatory agencies, which may affect the initiation, timing and progress of clinical trials and marketing approval;

Clene's ability to achieve commercial success for its marketed products and drug candidates, if approved; Clene's ability

to obtain and maintain protection of intellectual property for its technology and drugs; Clene's reliance on third parties to conduct

drug development, manufacturing and other services; Clene's limited operating history and its ability to obtain additional funding

for operations and to complete the licensing or development and commercialization of its drug candidates; the impact of the COVID-19 pandemic

on Clene's clinical development, commercial and other operations, as well as those risks more fully discussed in the section entitled

"Risk Factors" in Clene's Annual Report filed on Form 10-K, as well as discussions of potential risks, uncertainties,

and other important factors in Clene's subsequent filings with the U.S. Securities and Exchange Commission. Clene undertakes no

obligation to release publicly any updates or revisions to any forward-looking statements to reflect any change in its expectations or

any change in events, conditions or circumstances on which any such statement is based, subject to applicable law. All information in

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not be deemed to be, part of or incorporated into this press release.

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