Effects of Probiotics Combined with Insulin Therapy on Glycemic Control and Intestinal Microbiota in Children with Type 1 Diabetes Mellitus
This study demonstrates that adjuvant therapy with live *Clostridium butyricum* powder, combined with insulin, significantly improves glycemic control, reduces pro-inflammatory cytokines, and restores gut microbial homeostasis in children with type 1 diabetes mellitus compared to insulin therapy alone.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Type 1 diabetes is a condition where the body's immune system mistakenly attacks and destroys the cells in the pancreas that produce insulin. Without insulin, the body cannot turn sugar from food into energy, causing blood sugar levels to rise dangerously high. For children with this disease, daily insulin injections are the only way to survive, yet managing blood sugar remains a constant struggle. Even with careful treatment, many children still face high blood sugar levels, which over time can damage the eyes, kidneys, and nerves. In recent years, scientists have begun to look beyond the pancreas, focusing instead on the trillions of tiny bacteria living in the human gut. These microbes help digest food and train the immune system. When the balance of these bacteria is disturbed, it can trigger inflammation and worsen autoimmune diseases. Researchers now wonder if fixing this internal ecosystem could help children with diabetes manage their blood sugar better and reduce the inflammation that damages their bodies.
A team of doctors and scientists in Fuyang, China, decided to test this idea by combining standard insulin therapy with a specific type of beneficial bacteria. They recruited 77 children with type 1 diabetes, all between the ages of zero and sixteen, who had been taking insulin for at least three months. The children were divided into two groups. The larger group, consisting of 44 children, received only the standard intensive insulin treatment they were already on. The smaller group, with 33 children, received the same insulin treatment but also took a daily powder containing live Clostridium butyricum, a bacterium known for producing a substance called butyrate that helps keep the gut lining healthy. This group took the powder three times a day for four weeks. The researchers then followed all the children for three months to see how their blood sugar, inflammation levels, and gut bacteria changed. To understand what a healthy gut looks like, they also collected data from 91 healthy children of similar ages who did not have diabetes.
The results showed that while insulin alone helped lower blood sugar, the children who also took the bacterial powder saw significantly greater improvements. After three months, the group taking the powder reduced their average blood sugar by 61.3 percent, compared to a 47.8 percent reduction in the group taking insulin alone. Their long-term blood sugar marker, known as HbA1c, also dropped more sharply, falling by 3.1 percent versus just 1.35 percent for the control group. Beyond sugar levels, both groups saw reductions in harmful inflammatory signals, but the addition of the bacteria led to a much steeper decline in the treatment group. This was particularly true for two specific markers called IFN-gamma and IL-17A, which are linked to the immune system's overactive attacks; the group taking the powder saw a significantly larger drop in these markers compared to the group taking only insulin.
The study also looked inside the gut to see how the bacteria affected the microbial community. Before the treatment, children with diabetes had a less diverse collection of gut bacteria compared to the healthy children, meaning they had fewer different types of species living in their intestines. This lack of variety is a common sign of a disrupted gut environment. After the four-week treatment with the bacterial powder, the gut bacteria of the children in the treatment group began to look more like a healthy, balanced ecosystem. The researchers found that the bacterial communities in these children became more consistent and stable, with an increase in several rare types of bacteria that were previously missing. In the group that received only insulin, the gut bacteria remained largely unchanged, showing that the improvement was due to the bacterial powder and not just the passage of time or the insulin itself.
This research suggests that adding a specific probiotic to standard diabetes care can do more than just lower blood sugar numbers; it appears to calm the immune system and repair the gut environment. The scientists believe the bacteria work by producing substances that strengthen the gut wall, preventing harmful toxins from leaking into the blood and triggering inflammation. By stopping this cycle of inflammation, the body may be better able to use insulin and protect the remaining insulin-producing cells. While the study was limited to a single hospital and a relatively short time frame, the findings offer a promising new direction. They indicate that for children with type 1 diabetes, treating the gut might be a powerful way to support the body's natural defenses and improve overall health alongside traditional insulin therapy.
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