Scientists discover how to 3D print testicular cells —


In a pair of world firsts, UBC scientists have 3D printed human testicular cells and recognized promising early indicators of sperm-producing capabilities.

The researchers, led by UBC urology assistant professor Dr. Ryan Flannigan, hope the approach will in the future supply an answer for folks dwelling with presently untreatable types of male infertility.

“Infertility impacts 15 per cent of {couples} and male components are a contributing trigger in at the very least half these instances,” stated Dr. Flannigan, whose lab relies on the Vancouver Prostate Centre at Vancouver Normal Hospital.

“We’re 3D printing these cells into a really particular construction that mimics human anatomy, which we expect is our greatest shot at stimulating sperm manufacturing. If profitable, this might open the door to new fertility remedies for {couples} who presently don’t have any different choices.”

Inside human testicles, sperm is produced by tiny tubes often known as seminiferous tubules. In essentially the most extreme type of male infertility, often known as non-obstructive azoospermia (NOA), no sperm is present in ejaculate attributable to diminished sperm manufacturing inside these constructions.

Whereas in some instances docs might help NOA sufferers by performing surgical procedure to search out extraordinarily uncommon sperm, Dr. Flannigan says this process is barely profitable about half the time.

“Sadly, for the opposite half of those people, they haven’t any choices as a result of we will not discover sperm for them.”

These are the sufferers Dr. Flannigan’s staff is hoping to assist.

For the current research, the researchers carried out a biopsy to gather stem cells from the testicles of a affected person dwelling with NOA. The cells have been then grown and 3D printed onto a petri dish right into a hole tubular construction that resembles the sperm-producing seminiferous tubules.

Twelve days after printing, the staff discovered that the cells had survived. Not solely that, they’d matured into a number of of the specialised cells concerned in sperm manufacturing and have been displaying a big enchancment in spermatogonial stem cell upkeep — each early indicators of sperm producing capabilities. The outcomes of the research have been just lately revealed in Fertility and Sterility Science.

“It is an enormous milestone, seeing these cells survive and start to distinguish. There is a lengthy street forward, however this makes our staff very hopeful,” stated Dr. Flannigan.

The staff is now working to “coach” the printed cells into producing sperm. To do that, they’re going to expose the cells to totally different vitamins and development components and fine-tune the structural association to facilitate cell-to-cell interplay.

If they will get the cells to provide sperm, these sperm might doubtlessly be used to fertilize an egg by in vitro fertilization, offering a brand new fertility remedy choice for {couples}.

Dr. Flannigan’s analysis program has additionally been shedding new mild on the genetic and molecular mechanisms that contribute to NOA. They have been utilizing numerous single cell sequencing strategies to grasp the gene expression and traits of every particular person cell, then making use of computational modelling of this knowledge to raised perceive the basis causes of the situation and to determine new remedy choices. The work has been extremely collaborative, involving UBC researchers throughout laptop science, arithmetic and engineering, in addition to worldwide collaborations.

“More and more, we’re studying that there are doubtless many alternative causes of infertility and that every case may be very affected person particular,” stated Dr. Flannigan. “With that in thoughts, we’re taking a customized, precision medication method — we take cells from a affected person, attempt to perceive what abnormalities are distinctive to them, after which 3D print and assist the cells in ways in which overcome these authentic deficiencies.”