Jonathan Solomon
Analyst · H.C. Wainwright
Thank you, Marina, and good morning, everyone. Let me begin by saying that I believe BiomX is now entering the most exciting period in our company's 7-year history, with proof-of-concept data expected within the next 12 months in both our cystic fibrosis and atopic dermatitis programs, we are poised to generate readouts that could have significant impact on the value of our company. .
At the same time, with the recent equity investments from Maruho and Cystic Fibrosis Foundation, we are also well positioned financially with existing cash expected to take us at least until the end of 2023. Additional tranches of up to $15 million under our existing loan agreement may further extend our cash runway into mid-2024.
Let me now provide a brief update on each program, starting with BX004 in cystic fibrosis. BX004 is our novel phage candidate that is being developed for the treatment of chronic respiratory infection caused by Pseudomonas aeruginosa or P. aeruginosa, a main contributor to morbidity and mortality in patients with CF. Chronic P. aeruginosa infection leads to epithelial surface damage and airway plugging, progressively impairing pulmonary function. CF patients chronically infected by P. aeruginosa show a steeper lung function decline, a higher number of pulmonary exacerbations, more hospital admissions and a higher mortality than P. aeruginosa-free patients. P. aeruginosa inspections usually start in childhood and following prolonged and repeated broad-spectrum antibiotic courses, enhanced resistance to antibiotic develops and leads to the appearance of multidrug-resistant strains, MDR.
Studies have shown that about 80% of CF patients are chronically colonized by P. aeruginosa by the age of 20, and the 8-year risk of death was found to be 2.6x higher in patients with P. aeruginosa versus those without it. Research has also shown the continued colonization of P. aeruginosa eventually results in a point where the infection can no longer be controlled, which is further characterized by the expression of biofilm-forming genes within the bacteria itself. Biofilm and its assemblage of surface-associated microbial cells enclose an intracellular polymeric substance [ in ] one of the leading causes for antibiotic resistance.
In preclinical studies, BX004 not only demonstrated activity against antibody-resistant strains of P. aeruginosa, but also show the ability to penetrate biofilm. We, therefore, believe BX004 holds significant potential to address this life-threatening infection in CF patients.
The opportunity to address this unmet medical need is also significant. With an estimated 30,000 CF patients in the U.S. and 80,000 worldwide, chronic antibiotic-resistant bacterial infection remains one of the most challenging medical conditions in CF patients. P. aeruginosa is the most common and detrimental bacteria in lung infections of CF patients and it is estimated that approximately 30% to 50% of these patients suffer from chronic infection due to this bacteria.
Part 1 of this trial will evaluate the safety, pharmacokinetics and microbiological clinical activity of BX004 in 8 CF patients in a single ascending dose and multiple dose design. Part 2 of the trial will evaluate the safety and efficacy of BX004 in 24 CF patients who will be randomized to receive treatment or placebo cohort in a 2:1 ratio.
Sites are now open, but we are seeing slow enrollment due to the recent COVID wave. So to be conservative, we now expect the readout from Part 1 of the study in the third quarter of 2022 and the readout from Part 2 in the first quarter of 2023. We are also proud to have the support of the Cystic Fibrosis Foundation for the development of BX004. In January, we announced the Therapeutic Development Award from the foundation in support of our ongoing Phase Ib/IIa study. The award is structured as an equity investment. And in December, the foundation made its initial investment of $3 million in BiomX common stock. Upon completion of patient dosing in Part 1 of the study, BiomX would have the right to receive the second tranche of $2 million.
Now let me turn to the atopic dermatitis program. We are developing BX005 as a topical phage product candidate targeting Streptococcal aureus or Staph aureus, the bacterium associated with the development and exacerbation of inflammation in atopic dermatitis. By reducing Staph aureus burden, we believe BX005 has the potential to shift the skin microbiome composition to its baseline state leading to clinical improvement. Atopic dermatitis not only represents a significant unmet need, but the commercial opportunity remains attractive with the current therapeutic market valued at $5 billion, which is expected to triple over the next few years.
Given the size of the market opportunity, we recognize the importance of developing strategic relationships to maximize the value of this program. Last quarter, we announced an agreement with Maruho for BX005. As the largest dermatology-focused company in Japan, Maruho brings exceptional expertise in this therapeutic area, and we are very pleased to have their support for our program. Similar to the CF Foundation, Maruho's financial support for BX005 program came in the form of an equity investment in BiomX. Maruho purchased $3 million of our common stock at a premium to the market share price. Funding from this investment is intended primarily to support the planned Phase I/II study. We anticipate initial data in the fourth quarter of 2022.
With respect to our other programs, our IBD product candidate is expected to enter the clinic next year, and we also expect to build out our preclinical efforts surrounding our colorectal cancer product candidate in 2023 as well.
I'd now like to turn over the call to Marina Wolfson, our Senior Vice President of Finance and Operations, to cover our financial results for the fourth quarter and full year results.