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British men to test hormone-free male contraceptive pill

Scientists said that if the pill can be used widely it will transform contraception.

Ella Pickover by Ella Pickover
2023-12-13 16:29
in News
PA

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A group of British men are the first in the world to test a new hormone-free male contraceptive pill.

Scientists hope that if the tests are successful, the daily pill could broaden shared responsibility for contraception between the sexes.

Men can currently only use condoms or have a vasectomy while there are a vast array of contraceptives for women including the pill, the coil, a contraceptive injection and use of diaphragms or female condoms, among other options.

The new male pill is a hormone-free drug, unlike the female pill.

YCT-529

The pill, YCT-529, is a drug called a retinoic acid receptor-alpha inhibitor, which prevents sperm production by blocking access to vitamin A.

Previous studies dating back more than 90 years have shown that depriving mice, rats and monkeys of vitamin A can cause infertility.

Experts from YourChoice Therapeutics said that pre-clinical studies showed YCT-529 was “99% effective and 100% reversible with no side effects”.

The company said that previous versions of the male pill have attempted to supress the male sex hormone testosterone to prevent sperm production, but this does not stop sperm production completely and has been linked to some complications.

Now, 16 British men are testing the hormone-free pill.

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The phase 1 trial is being conducted by Quotient Sciences, a drug development company based in Nottingham.

Gunda Georg

Gunda Georg, regents professor at the University of Minnesota’s College of Pharmacy, who developed the pill, said: “The last innovation in contraception was the birth control pill for women, and that’s more than 60 years ago.

“The world is ready for a male contraceptive agent, and delivering one that’s hormone-free is simply the right thing to do given what we know about the side effects women have endured for decades from the pill.

“We consciously chose to inhibit the vitamin A signalling pathway in the testis because nearly 100 years of research has validated this pathway and shows that infertility can be reversed easily.

“Our pre-clinical data is strong, showing that YCT-529 was 99% effective in preventing mouse pregnancies and decreasing monkey sperm counts after two weeks of dosing.

“YCT-529 has also demonstrated a strong safety profile, and full reversibility in mice and monkeys once treatment ended.

“I commend the YourChoice Therapeutics team for taking this candidate into the clinic and feel confident in its safety profile, which the phase 1 study will affirm.”

YourChoice Therapeutics

Akash Bakshi, co-founder and chief executive of YourChoice Therapeutics, added: “YCT-529 blocks a protein — not hormones — to prevent sperm production.

“We believe this will be more attractive to men, most of whom view pregnancy prevention as a shared responsibility even despite today’s limited contraceptive options, which are permanent or only moderately effective.

“The dearth of options reinforces the centuries-old view that pregnancy prevention is ‘a woman’s responsibility’. It’s not, and we’re committed to advancing the first hormone-free birth control pill for men that’s effective, convenient and temporary.”

Male volunteers who would like to take part in the study are invited to contact Quotient Sciences at weneedyou.co.uk

Related: London’s black cabs set to hike fares significantly this Christmas

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