Scientists skeptical over Chinese firm’s Covid-19 drug claims, firm’s stocks surge

Chinese biotech agency Kintor Pharmaceutical Limited noticed its inventory worth soar by greater than 20% the day after it introduced on April 25 that it had “completed the first patient enrollment and dosing” in a late-stage U.S. medical trial of its experimental COVID-19 remedy.

It was the corporate’s newest announcement concerning the progress of the drug, Proxalutamide. The Hong Kong-listed firm’s inventory worth has practically quadrupled since March 1 as some analysts wrote concerning the massive gross sales potential for a COVID-19 remedy. Kintor has seen its market capitalization soar to HK$23.4 billion ($3 billion) from HK$6.6 billion ($850 million) on March 1.

But the corporate had not dosed any sufferers in any respect as of early May, in response to the physician Kintor recognized as its principal medical trial investigator in paperwork it posted on a U.S. trials web site. The physician – California-based gastroenterologist Zeid Kayali – additionally instructed Reuters he was “not in charge” of the trial, contradicting what the corporate had stated within the paperwork describing the examine. Kayali declined additional remark, referring inquiries to Kintor.

Told of Kayali’s feedback, Kintor Chief Financial Officer Lucy Lu stated Kayali was merely one in all its trial investigators. She declined additional touch upon the firm’s announcement on affected person dosing. Lu declined as effectively to call a distinct principal investigator, or the establishment overseeing the trial, calling that info “confidential.”

Companies are usually not obligated to launch such info. But many pharmaceutical corporations routinely present particulars about who’s main their medical trial and which analysis group or medical establishment is liable for guaranteeing affected person security and scientific validity.

Kintor’s lack of transparency, together with inconsistencies within the firm’s statements, increase a “red flag” concerning the firm’s claims, stated Stephen Ostroff, a former U.S. Food and Drug Administration (FDA) chief scientist and two-time appearing FDA commissioner.

Another pink flag: Kintor has repeatedly touted a Brazilian examine of Proxalutamide that claimed an effectiveness charge so excessive that Ostroff and different pharmaceutical specialists say it’s onerous to imagine.

The Brazil examine stated Proxalutamide confirmed a 92% discount in mortality threat amongst hospitalized COVID-19 sufferers, which Ostroff stated could be “breathtakingly extraordinary” if true.

Alexandre Cavalcanti, director of Sao Paulo’s HCor Research Institute, known as a presentation of the examine’s findings by its authors “amateur” and stated its claimed discount of mortality threat is just too excessive to be credible in mild of a world battle to seek out efficient COVID-19 therapies.


Proxalutamide doesn’t have regulatory approvals and isn’t obtainable on the market. The Brazil examine of the drug has not been peer-reviewed or printed, however the authors launched a brief presentation of its outcomes throughout a March information convention. Kintor promoted their findings.

“Based on the positive results … we expect Proxalutamide could become an important tool in the global fight against COVID-19,” Kintor’s Chief Executive Tong Youzhi stated in an announcement asserting the Brazilian outcomes on March 11.

That identical day, Kintor’s inventory worth jumped by practically 9%.

Lu, Kintor’s CFO, didn’t reply detailed questions from Reuters concerning the criticisms of the Brazil examine and Kintor’s claims about its U.S. trial.

One of the examine’s authors, Brown University dermatology professor Carlos Wambier, dismissed its critics and known as its outcomes “very encouraging.”

In an April 2 consumer notice, analysts from Beijing-based brokerage China Renaissance cited Kintor’s progress stories as proof of the “potentially wider application of Proxalutamide.” They gave the inventory a “buy” advice and set a goal worth of HK$50.75. Kintor’s inventory now trades at about HK$66, having reached a report excessive HK$82 in late April.

“The stock price is majorly driven by the COVID-19-related clinical progress,” stated Sam Hu, analyst at CMB International in Hong Kong.

One of the examine’s authors is a guide employed by a Brazilian Health Ministry official who’s an ally of the nation’s President Jair Bolsonaro. The president is a vaccine skeptic and a critic of masks and lockdowns who has promoted discredited COVID-19 cures such hydroxychloroquine. The well being official, Helio Angotti, assigned a staff of consultants to seek out proof to assist Bolsonaro’s unfounded medical claims.

Angotti declined to remark. Bolsonaro’s workplace didn’t reply to written questions from Reuters. The guide who co-authored the Proxalutamide examine, Ricardo Zimerman, didn’t reply to requests for remark.


Lu stated Kintor is in talks with Brazilian federal well being regulator Anvisa about conducting its personal medical trial. Anvisa stated in an announcement that Kintor had not filed any formal request to conduct a trial, however didn’t touch upon any talks between the regulator and the corporate.

Two Anvisa staffers, talking on situation of anonymity, questioned the outcomes of the Brazilian Proxalutamide examine, saying the authors’ outcomes presentation contained no detailed knowledge or proof. One of the Anvisa staffers characterised the presentation as extra advertising and marketing than science. Brazil’s Health Ministry, in a March technical notice, concluded that “the available evidence for the drug is still incipient,” with restricted info on security and outcomes.

Kintor initially conceived of Proxalutamide as a most cancers remedy, earlier than pivoting to COVID-19. Lu instructed Reuters that the FDA had allowed the agency to progress to a Phase III trial, skipping Phases I and II, after evaluating its earlier oncology research and the Brazil analysis. She declined to share any documentation from the FDA outlining that permission.

The FDA declined to touch upon Kintor or its COVID-19 drug. Ostroff stated it was regarding and atypical that Kintor used earlier-stage oncology trials, together with the questionable Brazil examine, as shortcuts to a Phase III COVID-19 trial. The firm’s solutions to fundamental questions on its medical trial, he added, had been evasive.

“Most pharmaceutical companies, especially related to COVID-19, will be quite open about what sorts of trials they’re doing,” he stated.

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.