Breaking News
January 23, 2018 - Findings provide better understanding of cognitive inflexibility in Fragile X Syndrome
January 23, 2018 - Powerful anti-oxidant can stop progression of fatty liver disease in young mice
January 23, 2018 - Study shows value of occupational therapy in the lives of young adults with diabetes
January 23, 2018 - Researchers seek to understand effect of very low birth weight on the brain
January 23, 2018 - Be a Savvy Supermarket Shopper
January 23, 2018 - NIH Striving to Avoid False Hope in Chronic Fatigue
January 23, 2018 - ClinicalTrials.gov: Occupational Stress
January 23, 2018 - PrEP could make US easily hit its 2020 HIV prevention goal, study finds
January 23, 2018 - Study finds considerable variation in hip fracture rates across nursing homes
January 23, 2018 - Evidence-based approach to preventing or treating caries could transform dental care
January 22, 2018 - TAVR Discharge Timing; Stentreiver Anesthesia; New Valve Depression
January 22, 2018 - Could sugar be responsible for the obesity and diabetes epidemics?
January 22, 2018 - Mallinckrodt Completes Stannsoporfin New Drug Application Filing
January 22, 2018 - ACOG Backs ‘Cascade Testing’ for Cancer-Related Mutations
January 22, 2018 - The terrible toll tennis can take on top players who play too much
January 22, 2018 - KAIST scientists identify cellular mechanism for severe viral hepatitis
January 22, 2018 - New genomic tools provide better understanding of the human immune system
January 22, 2018 - Improving QoL with an App?
January 22, 2018 - Researchers identify virus as likely cause of mystery polio-like paralysis
January 22, 2018 - First step toward CRISPR cure of Lou Gehrig’s disease
January 22, 2018 - Scientists uncover the proteins responsible for movement
January 22, 2018 - New clinical practice guideline provides recommendations for use of anticoagulants during heart surgery
January 22, 2018 - Depressive symptoms associated with poorer survival in patients with head and neck cancer
January 22, 2018 - Restaurant Bans Have Big Impact on Smoking Rates
January 22, 2018 - D.C. Week: CMS Outlines Path for Medicaid Work Mandate
January 22, 2018 - Study identifies new loci associated with asthma enriched in epigenetic marks
January 22, 2018 - Researchers explore impact of smart rollator in motivating seniors to increase physical activity
January 22, 2018 - New bug may reduce misery of hay fever sufferers
January 22, 2018 - Specially prepared supplement helps women to run faster, study shows
January 22, 2018 - 3-D Stent Retriever with Aspiration Proves Mettle in AIS
January 22, 2018 - Public health research seeks to understand how natural disasters impact spread of Zika
January 22, 2018 - Research reveals role of nanophenomenon in stimulating bone-repair process
January 22, 2018 - Drinking during late adolescence could be first step to liver problems in adulthood
January 22, 2018 - Epilepsy associated with volume and thickness differences in brain matter
January 22, 2018 - Trevena Announces FDA Acceptance for Review of New Drug Application for Olinvo (oliceridine) Injection
January 22, 2018 - A Noteworthy Margin of Error
January 22, 2018 - Firm advances human trials of revolutionary vaccine
January 22, 2018 - Many Indians put away treating orthopedic problems
January 22, 2018 - Cherwell releases new pocket guide to prepared culture media
January 22, 2018 - Huron earns ISO 13485 certification for quality management system
January 22, 2018 - Avion Pharmaceuticals Announces FDA Approval of Balcoltra (levonorgestrel and ethinyl estradiol tablets and ferrous bisglycinate tablets) Oral Contraceptive
January 22, 2018 - Multi-Gene Test For Early CVD; Neighborhood HF Risk; Novel Testosterone Drugs
January 22, 2018 - Skipping breakfast disrupts ‘clock genes’ that regulate body weight
January 22, 2018 - Creativity May Rely on ‘Teamwork’ in the Brain
January 22, 2018 - NeuroBreak: Alzheimer’s Germ Contest; High Salt Diet May Be Bad for Brain
January 22, 2018 - Diabetics may often fare poorly in hospice care
January 22, 2018 - Performance enhancing benefits of caffeine more apparent for infrequent tea, coffee drinkers
January 22, 2018 - HHS Unveils Framework for Interoperability
January 22, 2018 - More dentists to discuss risks of HPV-related cancers with their patients
January 21, 2018 - Research shows how Zika virus damages placenta to cause malformations in babies
January 21, 2018 - Achaogen Announces FDA Acceptance of New Drug Application with Priority Review for Plazomicin for Treatment of Complicated Urinary Tract Infections and Bloodstream Infections
January 21, 2018 - Drug Allergies: Time to Re-Test?
January 21, 2018 - Mitochondrial protein in cardiac muscle cells linked to heart failure, study finds
January 21, 2018 - Women more likely than men to die from a heart attack
January 21, 2018 - Next generation genomic sequencing can help detect pathogens after joint replacement
January 21, 2018 - Gov’t Shutdown Looms as Senate Debates Spending Bill
January 21, 2018 - Emergency Readiness for Older Adults and People with Disabilities
January 21, 2018 - Heart health at risk for Latinas over worries about deportation
January 21, 2018 - Scientists methodically identify genes related to blood feeding and non-biting mosquitoes
January 21, 2018 - Researchers discover potential target genes to halt thyroid cancer progression
January 21, 2018 - Youth with shared residency after parents’ divorce have less mental issues
January 21, 2018 - Sleep Better, Lose Weight? – Drugs.com MedNews
January 21, 2018 - More $$ Needed for Health Emergencies, Senators Told
January 21, 2018 - Gene test to predict breast cancer recurrence less cost effective in real world practice
January 21, 2018 - Study finds rise in number of adolescents receiving psychiatric or neurodevelopmental diagnosis
January 21, 2018 - Reminders can improve immunization rates
January 21, 2018 - A More Personalized Approach to PSA Screening in 2017
January 21, 2018 - T-cells engineered to outsmart tumors induce clinical responses in relapsed Hodgkin lymphoma
January 21, 2018 - Tetraphase Pharmaceuticals Announces Submission of New Drug Application to FDA for Eravacycline for the Treatment of Complicated Intra-Abdominal Infections (cIAI)
January 21, 2018 - Have Robotics Had a Detrimental Effect on Surgical Residency?
January 21, 2018 - Being bilingual may help autistic children
January 21, 2018 - Metrics Are Not Widespread in Rheumatoid Care
January 21, 2018 - Neuroanatomic abnormalities ID’d in those at risk for autism
January 21, 2018 - Children born with Down’s syndrome have superior genome that compensates for disability
January 21, 2018 - Study finds higher risks for asymptomatic paroxysmal AF patients
January 21, 2018 - The Second Stage of Diet Resolutions
January 21, 2018 - CT Scans Reduce Lung Cancer Deaths … But Among Whom?
January 21, 2018 - ADHD drug use soars among young women
January 21, 2018 - Researchers propose new regulation mechanism linked to action of SirT6 on chromatin
January 21, 2018 - Statins appear to reduce risk of repeated surgery in patients who undergo vitrectomy
New study shows link between gut bacteria and age-related chronic inflammation

New study shows link between gut bacteria and age-related chronic inflammation

image_pdfDownload PDFimage_print

A new study shows for the first time that gut bacteria from old mice induce age-related chronic inflammation when transplanted into young mice. Called “inflammaging”, this low-grade chronic inflammation is linked to life-limiting conditions such as stroke, dementia and cardiovasuclar disease. The research, published today in open-access journal Frontiers in Immunology, brings the hope of a potentially simple strategy to contribute to healthy ageing, as the composition of bacteria in the gut is, at least in part, controlled by diet.

“Since inflammaging is thought to contribute to many diseases associated with ageing, and we now find that the gut microbiota plays a role in this process, strategies that alter the gut microbiota composition in the elderly could reduce inflammaging and promote healthy ageing,” explains Dr Floris Fransen, who performed the research at the University Medical Center Groningen, The Netherlands. “Strategies that are known to alter gut microbiota composition include changes in diet, probiotics, and prebiotics”.

Previous research shows that the elderly tend to have a different composition of gut bacteria than younger people. Immune responses also tend to be compromised in the elderly, resulting in inflammaging. Knowing this, Fransen and his team set out to investigate a potential link.

The scientists transferred gut microbiota from old and young conventional mice to young germ-free mice, and analysed immune responses in their spleen, lymph nodes and tissues in the small intestine. They also analysed whole-genome gene expression in the small intestine. All results showed an immune response to bacteria transferred from the old mice but not from the young mice.

The results suggest that an imbalance of the bacterial composition in the gut may be the cause of inflammaging in the elderly. Imbalances, or “dysbiosis” of gut bacteria results in “bad” bacteria being more dominant than “good” bacteria. An overgrowth of bad bacteria can make the lining of the gut become more permeable, allowing toxins to enter the bloodstream where they can travel around the body with various negative effects. Dysbiosis can have serious health implications: several disorders, such as inflammatory bowel disease, obesity, diabetes, cancer, anxiety and autism are already linked to the condition.

“Our gut is inhabited by a huge number of bacteria” explains Fransen. “Moreover, there are many different kinds of bacterial species, and the bacterial species that are present can vary a lot from person to person”.

Maintaining a healthy gut microbiota is clearly important to a healthy body and healthy ageing, but why the gut microbiota is different in the elderly is not fully understood. Many people are aware of the effect a course of antibiotics can have on the digestive system for example, but as Fransen explains, it may not be down to just one thing: “It is likely a combination of factors such as reduced physical activity, changes in diet, but also as part of a natural process”.

Most, if not all, age-related diseases can be linked back to inflammaging. Despite the fact that this particular study was conducted on mice, it is clear that maintaining a healthy gut microbiota is key to a healthy lifestyle. However, more research is needed to confirm that the human body mirrors the mice in this study.

“Both in humans and mice there is a correlation between altered gut microbiota composition and inflammaging, but the link between the two remains to be proven in humans” concludes Fransen.

Source:

https://www.frontiersin.org/

Tagged with:

About author

Related Articles