Why do men have higher risk? Brain cell study finds clues

• Parkinson’s illness impacts males extra typically than females, and a brand new examine sheds gentle on why this is likely to be.
• The examine concludes that genetic modifications in mind cells could present a clue.
• Specifically, the researchers conclude that epigenetic modifications primarily based on a person’s genetic make-up is likely to be significantly vital.
• Higher understanding intercourse variations in Parkinson’s illness will hopefully assist scientists perceive the situation and design simpler therapies.

A brand new examine, introduced lately on the Federation of European Neuroscience Societies (FENS) Discussion board 2026 in Barcelona, Spain, uncovers genetic modifications in mind cells that may assist us perceive why Parkinson’s is way more prevalent in males.

Parkinson’s is the second-most prevalent neurodegenerative situation, affecting round 1% of people aged over 60. Attributable to many components, together with our rising common age, the variety of Parkinson’s circumstances is projected to achieve roughly 9 million by 2030, doubling circumstances since 2005.

These figures are regarding, and on condition that present therapies are removed from excellent, understanding the illness as a lot as doable is important.

Males are round 1.5 times more likely to develop Parkinson’s illness than females. Moreover, females are inclined to develop the situation later than males and survive for longer.

These variations may very well be as a consequence of a variety of things, together with an elevated chance of males experiencing head accidents or publicity to pesticides, solvents, and metals.

Nevertheless, it’s nonetheless an open query, and the newest examine helps us start to reply it.

The brand new examine approaches the situation from a special approach. “Probably the most attention-grabbing side is that the researchers are analyzing Parkinson’s illness by the lens of organic intercourse and glial cells, reasonably than focusing solely on neurons,” Laura Bojarskaite, PhD, instructed Medical Information Right this moment. Bojarskaite, who was not concerned within the examine, is a neuroscientist and postdoctoral fellow on the College of Oslo.

Specifically, the researchers investigated epigenetics and their potential position within the intercourse variations seen in Parkinson’s. Epigenetic modifications should not modifications to the DNA code; reasonably, they’re modifications that swap genes “on” or “off.”

Probably the most well-studied type of epigenetic modification is methylation, through which a methyl group is added to DNA, successfully switching it“off” or “silencing” it.

As she explains, this means “that an individual’s genetic make-up influences these DNA methylation modifications.” This spurred her to research what particularly may affect variations in DNA methylation patterns between men and women.

Schulze-Hentrich and her colleagues collected mind samples from deceased individuals. In whole, there have been 73 individuals with Parkinson’s (28 females and 45 males). They in contrast these samples with 24 people with out Parkinson’s (9 females and 15 males).

The scientists measured variations in gene expression throughout all mind cell varieties in 5 areas. This consists of neurons, which transmit messages, and glial cells, that are multi-functional assist cells for neurons. Glial cells embody astrocytes, oligodendrocytes, and microglia.

“We studied 5 mind areas and located that Parkinson’s causes widespread modifications within the mind, no matter intercourse,” explains Schulze-Hentrich. “

“All these cells within the 5 areas,” she continued, “confirmed indicators of being below stress. They switched on proteins that assist broken proteins fold appropriately, referred to as ‘chaperones.’”

Curiously, additionally they discovered variations in gene exercise between men and women, in some cells and a few mind areas.

Schulze-Hentrich and her staff recognized variations in gene exercise between the sexes, together with:

• In astrocytes, variations within the exercise of genes related to mitochondria (cell organelles that produce power).
• In oligodendrocytes, there have been variations within the exercise of genes answerable for creating the mind cells’ myelin sheath, which is a protecting coating mandatory for sign transduction.

“This exhibits that Parkinson’s triggers some shared ‘stress responses’ in everybody’s mind cells,” explains Schulze-Hentrich, “but additionally, there are variations between women and men on the mobile degree, particularly in how the mind ‘assist’ cells handle power and shield nerve connections.”

She explains how their findings “assist to elucidate why signs and illness development in Parkinson’s differ between women and men.”

She hopes that this might, ultimately, result in customized Parkinson’s therapies, “reasonably than treating all sufferers with Parkinson’s as biologically similar.”

Talking to MNT, Dr. Kang Hsu, Chief Medical Officer (CMO) of Canary Speech, stated, “What stands out most to me is that ladies with Parkinson’s confirmed stronger blood‑primarily based gene‑swap modifications than males, although males get Parkinson’s extra typically.” Hsu was not concerned within the analysis.

Prior to now, a lot of the analysis on Parkinson’s illness has targeted solely on neurons or on males (people or animals). Schulze-Hentrich hopes that future researchers will solid their web a bit wider, serving to us higher perceive the person variations in how this situation develops and progresses.

This examine provides a small piece to the large, sprawling jigsaw that’s Parkinson’s illness. Regardless of the situation being named effectively over 100 years in the past, we’re nonetheless removed from a treatment, and current therapies are nonetheless restricted.

MNT requested neurologist, Dr. Rab Nawaz Khan, who was not concerned within the examine, why Parkinson’s is so difficult to review:

“Parkinson’s possible begins years earlier than the basic motion signs seem, making it troublesome to know when the illness actually began or which exposures mattered most.”

“It is usually a really heterogeneous situation,” he continued, “two individuals can have totally different signs, charges of development, genetic backgrounds, and environmental histories.” Plus, he explains, “We nonetheless lack a easy, definitive check that may establish each case early.”

“Environmental exposures, irritation, and life-style all contribute to danger, however their relative significance differs between people. Slightly than being attributable to a single issue. Parkinson’s possible outcomes from the interplay of many organic and environmental influences, making it troublesome to pinpoint clear causes.”
— Laura Bojarskaite, PhD

So, whereas the brand new examine provides to our understanding, we nonetheless have a protracted journey forward of us.