Recce Pharmaceuticals Announces Positive Data on RECCE® 327 Against Neisseria gonorrhoeae in STD Animal Model

SYDNEY, Australia, May 04, 2020 (GLOBE NEWSWIRE) -- Recce Pharmaceuticals Ltd (ASX: RCE) (Company), the company developing a new class of broad-spectrum synthetic antibiotics, today announced positive efficacy showing significant antibacterial activity against Neisseria gonorrhoeae bacteria in mice treated with its lead compound RECCE® 327.

Dr. John Prendergast, Non-Executive Chairman of Recce Pharmaceuticals said, “Gonorrhea has developed resistance to all but one class of antibiotics, so there is an urgent need to find a new class of effective antibiotics to kill the pathogen, before it develops resistance to the last recommended treatment. Data from this study, along with previous other reports, continue to highlight the potential of RECCE® 327 to not only become a potent broad spectrum antibiotic but most critically to continue working against antibiotic resistant bacteria or superbugs, even with repeated use.”

The study was conducted by an independent Contract Research Organization to assess the dose-dependency of RECCE® 327 and in vivo antibacterial activity against Neisseria gonorrhoeae (N. gonorrhoeae), a species of Gram-negative bacteria, and the second most common sexually transmitted infection (STI) globally.1 The recognized vaginal infection model met its primary endpoint of a reduction in bacterial load compared to vehicle infected control evaluated on the seventh day following dosing.

Three groups of 10 female mice each showed RECCE® 327 efficacy at different dose levels with significant reduction in bacterial load in the vaginal infection as compared to the vehicle control (p<0.05).

  Log10 CFU/Swab (Mean ± SD)(n=8)  
Group Treatment Group*** Day 9 PI**
1 Vehicle infected control 5.65 ± 0.46
2 Infected control + Marketed Drug [50mg] Meropenem 4.08 ± 0.76*
3 Infected + RECCE® 327 (100 mg/kg) 4.90 ± 0.47*
4 Infected + RECCE® 327 (500 mg/kg) 3.95 ± 0.45*
5 Infected + RECCE® 327 (1000 mg/kg) 2.77 ± 0.34* 

CFU: colony-forming units- Used to estimate number of bacteria in a sample.
*(P<0.05) significantly different from vehicle control;
** PI – Post Infection
*** Treatment began two days post infection and received IV bolus twice daily duration of treatment - seven days

The study director concluded, “RECCE® 327 showed significant dose dependent antibacterial effect in vaginal load at 100, 500 and 1000 mg/kg given by intravenous (IV) bolus when compared to the control group seven days post infection."

In this study Meropenem, a broad spectrum carbapenem antibiotic, was used at its optimum dose as the recognized efficacy model. In practice however, Meropenem’s high rates of bacterial resistance have recently led to restriction of its use, now reserved for infections caused by resistant organisms.2

The World Health Organization (WHO) lists N. gonorrhoeae as a priority pathogen on its list of antibiotic-resistant bacteria that pose the greatest threat to human health.3 The leading national public health institute of the U.S., the Centers for Disease Control and Prevention (CDC) estimates drug-resistant N. gonorrhoeae results in 550,000 infections each year, with a total of 1.14 million infections from N. gonorrhoeae annually.4

About Recce Pharmaceuticals Ltd

Recce Pharmaceuticals Ltd (ASX: RCE) is pioneering the development and commercialization of a new class of synthetic antibiotics with broad spectrum activity designed to address the urgent global health problem of antibiotic resistant superbugs.

Recce antibiotics are unique – their potency does not diminish even with repeated use, which is a common failure associated with existing antibiotic use and the resulting emergence of resistant superbugs.

Patented lead candidate RECCE® 327, wholly owned and manufactured in Australia, has been developed for the treatment of blood infections and sepsis derived from E. coli and S. aureus bacteria – including their superbug forms.

The FDA has awarded RECCE® 327 Qualified Infectious Disease Product designation under the Generating Antibiotic Initiatives Now (GAIN) Act – labelling it for Fast Track Designation, plus 10 years of market exclusivity post approval.

Recce wholly owns its automated manufacturing, ready to support first-in-human clinical trials. Recce’s anti-infective pipeline seeks to exploit the unique capabilities of RECCE® technologies targeting synergistic, unmet medical needs.

Executive Director Media & Investor Relations (AU) Media & Investor Relations (USA)
James Graham Andrew Geddes Meredith Sosulski, PhD
Reece Pharmaceuticals, Ltd. CityPR LifeSci Communications
+61 (02) 8075 4585 +61 (02) 9267 4511 +1 929 469 3851

1NCBI, National Institute of Health
2Ohio State Publications
3WHO list of bacteria
4CDC Drug Resistance Threats

Photos accompanying this announcement are available at

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Efficacy of RECCE® 327 Against Neisseria Gonorrhoeae in Mice


Efficacy of RECCE® 327 Against Neisseria Gonorrhoeae in Mice



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