Vaccine Info

UB-621 Long-Acting Herpes Treatment

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Last reviewed
May 10, 2023
Fact checked by
Robert Carlson, MD

UB-621 Long-Acting Herpes Treatment 2023

United BioPharma UB-621 is a long-acting monoclonal antibody (mAbs) treatment for genital herpes caused by simplex viruses 1 and 2 (HSV-1 and HSV-2). UB-621 is an anti-gD mAB that demonstrated strong viral suppression of transmission and recurrence of HSV1 and HSV2.

UB-621 is a novel, fully human mAb that interferes with HSV infection by binding specifically to HSV envelope glycoprotein D (gD). It can neutralize both wild-type HSV lab strains and multi-drug-resistant clinical isolates. UB-621 exhibited a high-affinity binding (Kd, 3.6 × 10-11 M) to gD protein and high potency against HSV-1 and HIV-2 infections. UB-621 also can inhibit the cell-to-cell spread of HSV-1 and HSV-2.

UB-621 has been developed over ten years of research collaboration between the University of Washington, the U.S. National Institute for Allergy and Infectious Diseases, the University of Duisburg Essen, Germany, and Dartmouth College, USA. The phase 2 clinical study with 44 people was last updated on May 18, 2022, with an Estimated Study Completion Date of January 31, 2025.

UBP's cell line, process development, protein analysis, and formulation methods empower the develop a high titer, robust, scalable cell culture and establish an optimized yield and robust mAbs drug purification process. UBP has developed more than 30 analytical development methods and validation for physiochemical and protein characterization, drug formulation development, comparability studies, and quality control.

Shanghai Public Health Clinical Centre and Cheng Kung University's Department of Microbiology and Immunology have joined United BioPharma's fight against the global herpes endemic. Together with United BioPharma, the two institutions will test the effectiveness of UB-621 in the U.S. and China.

UBP's Headquarters Centers of Excellence in R&D and Manufacturing is located at 45-1 Guangfu N. Rd., Hukou Industrial Park, Hukou Township, Hsinchu County, TAIWAN 30351.

HSV Tests 2023

The U.S. Preventive Services Task Force recommends against routine serologic screening for genital HSV infections in 2023. However, herpes tests can be ordered online in the U.S. at Ultalabtests

UB-621 Indication

United BioPharma's UB-621 – with a half-life of 23-28 days, which may allow a monthly or quarterly dosing scheme to treat HSV infection. 

UB-621 Administration

UB-621 is administered via subcutaneous injection and targets surface glycoprotein gD found to inhibit viral entry into cells. A subcutaneous liquid formulation may allow a monthly or quarterly dosing scheme to treat HSV infection.

UB-621 Dosage

In an open-label, dose-escalation Phase 1 study, UB-621 was demonstrated to be safe and well-tolerated in 15 healthy volunteers receiving a single subcutaneous injection at doses ranging from 0.1 mg/kg to 5 mg/kg. The phase 2 study evaluates 2.5 mg/kg UB-621 group mAb and by SC administration 5 mg/kg UB-621 group. The Estimated Study Completion Date is January 31, 2025.

UB-621 News 2023

October 18, 2021 - UB-621 will be heading into Phase 2 clinical trials in the United States and China. "Data from our initial trials suggest that UB-621 is not only a best-in-class treatment but a potential game-changer for billions of patients suffering from herpes worldwide. In addition, testing on clinical isolates will help confirm whether UB-621 can work well against herpes strains, especially those that have already been shown to be resistant to currently marketed drugs", said Dr. Shugene, Lin, President of United BioPharma.

July 13, 2021 - United BioPharma announced that its subsidiary company in Shanghhadhas received Investigational New Drug approval from China's National Medical Products Administration for a Phase 2 clinical trial with UB-621.

November 10, 2020 - United BioPharma announced they had received Investigational New Drug approval from China National Medical Products Administration to conduct a Phase 2 clinical trial with UB-621.

August 5, 2020 - United BioPharma (UBP) announced that it received approval for an Investigational New Drug from the Taiwan Food and Drug Administration to conduct a  Phase 1 clinical trial with UB-421 SC, an anti-CD4 monoclonal antibody formulated for subcutaneous injection in treatment-naïve, HIV-1 infected patients.

UB-621 Clinical Trials

UB-621 has completed a Phase 1 clinical trial and has launched a Phase 2 clinical trial that was Last Updated on May 18, 2022.

Clinical Trials

No clinical trials found