Scientists have not found one true cause behind multiple sclerosis. But what is known is that there is a genetic factor that could influence your disease risk.
How do your genes affect multiple sclerosis?
There is no single gene that directly causes MS
There are many genes—as much as 233—that each have their own small contribution to multiple sclerosis. “There’s a lot of research looking at what alleles, pieces of gene, in people with multiple sclerosis have that aren’t seen in the general population that could make them susceptible to the disease,” adds says Mary Ann Picone, M.D., a neurologist specializing in multiple sclerosis at Holy Name Medical Center.
Dr. Gutman says the ones most relevant to the development of multiple sclerosis are those involved in regulating the immune system. In other words, genes that regulate what your immune system will target versus not target. Indeed, research shows that some of these genes—HLA-DRB1 and the HLA-DRB1*15:01—are involved in innate immunity, the first line of defense when a threat is present in the body, and contributes to the progression of multiple sclerosis.
Your genes play a small role in getting MS
Having a family history of multiple sclerosis can also elevate your risk of the disease, although it’s not something that’s passed down from parent to child. What’s more, even if a relative has multiple sclerosis, Dr. Gutman says the increased risk is very small in the grand scheme of things. “Compare it to sickle cell anemia where if a parent has sickle cell disease, you have a 25% chance of being a carrier, sometimes 50% depending on the other parent.”
“It’s one of the ways we know that multiple sclerosis is an autoimmune disease unlike Alzheimer's, where it's more of a neurodegenerative disease with a weaker genetic link,” adds Sharon Stoll, D.O., a neurologist specializing in multiple sclerosis and neuroimmunology at Yale School of Medicine.
What’s your genetic risk?
You have an estimated 1 in 67 chance (1.5%) of getting multiple sclerosis if mother or father have it as well. A brother or sister with multiple sclerosis translates to a 1 in 37 (2.7%) chance of developing it yourself.
In identical twins whose genes are 100% identical, if one developed multiple sclerosis, the chances of the other getting it is 25%. “If this was a strictly genetic condition, one condition in one twin would mean a 100% chance of getting it for the other,” explains Dr. Gutman.
To put it in perspective, Dr. Gutman says having multiple sclerosis from a close relative makes you 20 times higher than the general population—raising your overall risk to 2% and a 98% chance you won’t ever develop it. “Again, there is a genetic contribution, but by far the most risk is non-genetic.”
Other risk factors for MS
Genetic is only part of the story. There are environmental triggers that can increase your risk for multiple sclerosis. These include:
Epstein-Barr infection
Low vitamin D levels
Age
Being of the female gender
Having other autoimmune diseases
Smoking
Obesity
Click the link for the rest of the story.
https://www.prevention.com/health/he...is-hereditary/
How do your genes affect multiple sclerosis?
There is no single gene that directly causes MS
There are many genes—as much as 233—that each have their own small contribution to multiple sclerosis. “There’s a lot of research looking at what alleles, pieces of gene, in people with multiple sclerosis have that aren’t seen in the general population that could make them susceptible to the disease,” adds says Mary Ann Picone, M.D., a neurologist specializing in multiple sclerosis at Holy Name Medical Center.
Dr. Gutman says the ones most relevant to the development of multiple sclerosis are those involved in regulating the immune system. In other words, genes that regulate what your immune system will target versus not target. Indeed, research shows that some of these genes—HLA-DRB1 and the HLA-DRB1*15:01—are involved in innate immunity, the first line of defense when a threat is present in the body, and contributes to the progression of multiple sclerosis.
Your genes play a small role in getting MS
Having a family history of multiple sclerosis can also elevate your risk of the disease, although it’s not something that’s passed down from parent to child. What’s more, even if a relative has multiple sclerosis, Dr. Gutman says the increased risk is very small in the grand scheme of things. “Compare it to sickle cell anemia where if a parent has sickle cell disease, you have a 25% chance of being a carrier, sometimes 50% depending on the other parent.”
“It’s one of the ways we know that multiple sclerosis is an autoimmune disease unlike Alzheimer's, where it's more of a neurodegenerative disease with a weaker genetic link,” adds Sharon Stoll, D.O., a neurologist specializing in multiple sclerosis and neuroimmunology at Yale School of Medicine.
What’s your genetic risk?
You have an estimated 1 in 67 chance (1.5%) of getting multiple sclerosis if mother or father have it as well. A brother or sister with multiple sclerosis translates to a 1 in 37 (2.7%) chance of developing it yourself.
In identical twins whose genes are 100% identical, if one developed multiple sclerosis, the chances of the other getting it is 25%. “If this was a strictly genetic condition, one condition in one twin would mean a 100% chance of getting it for the other,” explains Dr. Gutman.
To put it in perspective, Dr. Gutman says having multiple sclerosis from a close relative makes you 20 times higher than the general population—raising your overall risk to 2% and a 98% chance you won’t ever develop it. “Again, there is a genetic contribution, but by far the most risk is non-genetic.”
Other risk factors for MS
Genetic is only part of the story. There are environmental triggers that can increase your risk for multiple sclerosis. These include:
Epstein-Barr infection
Low vitamin D levels
Age
Being of the female gender
Having other autoimmune diseases
Smoking
Obesity
Click the link for the rest of the story.
https://www.prevention.com/health/he...is-hereditary/
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