The blog of Xeno, a slightly mad scientist
To implant the lab-grown vaginas, surgeons first had to create a canal in the women’s pelvic areas. The surgeons then sutured the biodegradable scaffold to the patients’ already existing reproductive structures. In the weeks following the operation, the women’s nerves and blood vessels gradually expanded and started integrating themselves into the engineered tissue. As this was happening, the women’s bodies were slowly absorbing the scaffolding. By the time the scaffolding had completely disappeared, it was no longer needed — the cells had laid down their own permanent support structure.
More about the announcement:
… a miraculous scientific advancement was announced: The long-term success of lab-made regenerative human tissue! Between June 2005 and October 2008, laboratory generated vaginas were implanted in four teenage girls born with a rare genetic disease. The results of the procedures were published yesterday in the science journal the Lancet, and it was announced that up to eight years later, the women are doing quite well. The patients can now have painless sex and even orgasm!
The women were all born with the genetic disease Mayer-Rokitansky-Kuster-Hauser syndrome, which affects one in 4,500 girls. The syndrome causes women to be born with either an underdeveloped or absent vagina and uterus. The lab-grown vaginal organ was implanted in women ages 13 to 18. Eight years later they all have normal organ function, according to Atlantida-Raya Rivera, who was a lead author of the study.
“Tissue biopsies, MRI scans and internal exams using magnification all showed that the engineered vaginas were similar in makeup and function to native tissue,” Rivera said. Dr. Rivera is also the director of the HIMFG Tissue Engineering Laboratory at the MRKH in Mexico City, the location of the surgeries….
Scans of the pelvic region were used to design a tube like 3D-scaffold for each patient
Four women have had new vaginas grown in the laboratory and implanted by doctors in the US.
A tissue sample and a biodegradable scaffold were used to grow vaginas in the right size and shape for each woman as well as being a tissue match.
They all reported normal levels of “desire, arousal, lubrication, orgasm, satisfaction” and painless intercourse.
Experts said the study, published in the Lancet, was the latest example of the power of regenerative medicine.
In each woman the vagina did not form properly while they were still inside their mother’s womb, a condition known as vaginal aplasia.
Current treatments can involve surgically creating a cavity, which is then lined with skin grafts or parts of the intestine.
The scaffold is made of a biodegradable material
Doctors at Wake Forest Baptist Medical Centre in North Carolina used pioneering technology to build vaginas for the four women who were all in their teenage years at the time.
Scans of the pelvic region were used to design a tube-like 3D-scaffold for each patient.
A small tissue biopsy was taken from the poorly developed vulva and grown to create a large batch of cells in the laboratory.
Muscle cells were attached to the outside of the scaffold and vaginal-lining cells to the inside.
The vaginas were carefully grown in a bioreactor until they were suitable to be surgically implanted into the patients.
One of the women with an implanted vagina, who wished to keep her name anonymous, said: “I believe in the beginning when you find out you feel different.
“I mean while you are living the process, you are seeing the possibilities you have and all the changes you’ll go through.
“Truly I feel very fortunate because I have a normal life, completely normal.”
All the women reported normal sexual function.
Vaginal aplasia can lead to other abnormalities in the reproductive organs, but in two of the women the vagina was connected to the uterus.
There have been no pregnancies, but for those women it is theoretically possible.
The scaffold is placed in an incubator
Dr Anthony Atala, director of the Institute for Regenerative Medicine at Wake Forest, told the BBC News website: “Really for the first time we’ve created a whole organ that was never there to start with, it was a challenge.”
He said a functioning vagina was a “very important thing” for these women’s lives and witnessing the difference it made to them “was very rewarding to see”.
This is the first time the results have been reported. However, the first implants took place eight years ago.
Are the cells, and thus tissues and organs, grown this way the same biological age (in terms of number of times the cells can divide) as the donor or younger? Next up: replacement organs to prolong life.