WEDNESDAY, Jan. 5, 2022 (HealthDay Information) — Scientists have identified for 100 years that insulin is the physique’s principal mechanism for controlling blood sugar levels, however researchers have now found a second hormone does the identical job a bit in another way — and so they say it might be a brand new goal for treating diabetes.
The hormone, referred to as FGF1, is produced within the physique’s fat tissue. Like insulin, it swiftly lowers sugar ranges within the blood, however researchers present in mice that it really works independently of insulin, and by a unique mechanism.
Type 2 diabetes arises when the physique turns into immune to insulin, resulting in chronically excessive blood ranges of glucose (sugar). Over time, that may take a toll on the physique’s arteries and nerves, resulting in problems like heart and kidney disease, stroke, vision issues and everlasting nerve damage.
Within the new research, scientists discovered FGF1 suppresses the breakdown of fats tissue, which reduces the liver’s potential to churn out glucose. Insulin additionally does these issues, however FGF1 accomplishes it by way of a unique “signaling pathway” within the physique.
And in lab mice with insulin resistance, injections of FGF1 considerably decrease blood sugar.
“This mechanism is principally a second loop, with all the benefits of a parallel pathway,” stated research writer Gencer Sancar, a postdoctoral researcher on the Salk Institute in La Jolla, Calif.
“In insulin resistance, insulin signaling is impaired,” Sancar stated in an institute information launch. “Nevertheless, with a unique signaling cascade, if one will not be working, the opposite can. That method you continue to have the management of [fat breakdown] and blood glucose regulation.”
Nevertheless, whether or not the animal findings will finally translate to folks with type 2 diabetes stays to be seen.
One query is whether or not people who find themselves insulin-resistant would even be immune to FGF1, famous Dr. Emily Gallagher, an endocrinologist who was not concerned within the research.
She stated it is also potential that concentrating on FGF1 might be efficient in sure folks with kind 2 diabetes, however not others.
“Kind 2 diabetes is a posh situation the place completely different people have completely different metabolic profiles,” defined Gallagher, an assistant professor within the Division of Endocrinology, Diabetes and Bone Illnesses on the Icahn College of Drugs at Mount Sinai in New York Metropolis.
Scientists had identified one thing in regards to the workings of FGF1. In previous research, the Salk researchers discovered that it lowered blood sugar in lab mice, and when given regularly it lessened insulin resistance within the animals.
The brand new research, printed Jan. 4 within the journal Cell Metabolism, delved into precisely how the hormone works.
The researchers discovered that, just like insulin, FGF1 suppresses fats breakdown, which in flip helps management blood sugar. However its modus operandi is completely different: Insulin acts by an enzyme referred to as PDE3B, which units off a sequence of occasions referred to as a signaling pathway.
FGF1 makes use of a unique enzyme — referred to as PDE4.
“Now that we have a brand new pathway, we will work out its position in vitality homeostasis within the physique and find out how to manipulate it,” stated senior research writer Michael Downes, a employees scientist at Salk.
Gallagher stated it is “very attention-grabbing” that FGF1 can have insulin-like results in fats tissue. However far more stays to be realized.
Extra lab analysis, she stated, is required to know the long-term results of FGF1 on insulin signaling and insulin resistance.
“And in folks,” Gallagher stated, “it will be essential to know extra in regards to the systemic results of administering FGF1, as FGF1 impacts many organ programs — together with the inflammatory system — and in addition can alter tumor progress.”
Whether or not manipulating the hormone, or the proteins it regulates, could be acceptable in folks with kind 2 diabetes “stays to be decided,” Gallagher stated.
The U.S. Nationwide Institute of Diabetes and Digestive and Kidney Illnesses has extra on type 2 diabetes.
SOURCES: Emily Gallagher, MD, PhD, assistant professor, Division of Endocrinology, Diabetes and Bone Illnesses, Icahn College of Drugs at Mount Sinai, New York Metropolis; Cell Metabolism, Jan. 4, 2022; Salk Institute, information launch, Jan. 4, 2022