Breaking News
January 22, 2019 - Amgen And UCB Receive Positive Vote From FDA Advisory Committee In Favor Of Approval For Evenity (romosozumab)
January 22, 2019 - Does being bilingual make children more focused? Study says no
January 22, 2019 - Study reveals new genes and biological pathways linked to osteoarthritis
January 22, 2019 - FSU study provides better understanding of spinal cord injuries
January 22, 2019 - Delaying bath for newborn babies increases breastfeeding rates, finds study
January 21, 2019 - Many parents still try non-evidence-based cold prevention methods for children
January 21, 2019 - High Levels of Activity, Motor Ability Linked to Better Cognition
January 21, 2019 - Killer blows? Knockout study of pair of mouse MicroRNA provides cancer insight
January 21, 2019 - Buffalo researchers receive grant to quicken development of generic equivalents of contraceptives
January 21, 2019 - One-third of pregnant women do not believe cannabis is harmful to their fetus
January 21, 2019 - Fiderstat could be used as chemopreventative drug for intestinal cancers caused by APC gene mutations
January 21, 2019 - Modifying healthcare delivery practices may improve discussions between youth and healthcare providers
January 21, 2019 - UNIST researcher named as recipient of Merck’s 2018 Life Science Awards
January 21, 2019 - How Getting a Flu Shot Could Save Your Life
January 21, 2019 - Surgical adhesions can be treated, prevented in mice
January 21, 2019 - Increased physician-targeted marketing associated with higher opioid overdose deaths
January 21, 2019 - Researchers uncover specific microbial signatures of intestinal disease
January 21, 2019 - Simple blood test reliably detects signs of Alzheimer’s damage before symptoms
January 21, 2019 - Study to investigate new targeted oral treatments for severe asthma
January 21, 2019 - Plan Your Plate | NIH News in Health
January 21, 2019 - Fecal occult blood test may improve CRC outcomes in some
January 21, 2019 - Blood test detects Alzheimer’s disease years before symptoms develop
January 21, 2019 - Mount Sinai joins with Paradigm and ReqMed to repurpose drug for treatment of MPS
January 21, 2019 - FDA Advisory Committee Votes on Zynquista (sotagliflozin) as Treatment for Adults with Type 1 Diabetes
January 21, 2019 - The causes and complications of snoring
January 21, 2019 - Placenta adapts and compensates when pregnant mothers have poor diets or low oxygen
January 21, 2019 - New implant could restore the transmission of electrical signals in injured central nervous system
January 21, 2019 - Rapid-acting fentanyl test strips found to be effective at reducing overdose risk
January 21, 2019 - Coronary Artery Calcium May Help Predict CVD in South Asians
January 21, 2019 - The mystery of the super-ager
January 21, 2019 - Scientists develop smart microrobots that can change shape depending on their surroundings
January 21, 2019 - Keep Moving to Keep Brain Sharp in Old Age
January 21, 2019 - Despite progress, gay fathers and their children still structurally stigmatized
January 21, 2019 - New drug for treating liver parasites in vivax malaria
January 21, 2019 - Merck recognized with 2018 Life Science Industry Award for best use of social media
January 21, 2019 - Coeur Wallis equips the canton of Valais with 260 SCHILLER defibrillators
January 21, 2019 - Scientists propose quick and pain-free method for diagnosing kidney cancer
January 21, 2019 - Signs of memory loss could point to hearing issues
January 21, 2019 - HeartFlow Analysis shows highest diagnostic performance for detecting coronary artery disease
January 21, 2019 - How Much Caffeine is Too Much?
January 21, 2019 - Take a timeout before you force your child to apologize
January 21, 2019 - Scientists design two AI algorithms to improve early detection of cognitive impairment
January 21, 2019 - Novel therapy for children with chronic hormone deficiency provides lifeline for parents
January 21, 2019 - Bioethicists call for oversight of poorly regulated, consumer-grade neurotechnology products
January 21, 2019 - Study shows hereditary hemochromatosis behind many cancers and joint diseases
January 21, 2019 - Short bouts of stairclimbing throughout the day can improve cardiovascular health
January 20, 2019 - Liver Transplant Survival May Improve With Race Matching
January 20, 2019 - Study implicates hyperactive immune system in aging brain disorders
January 20, 2019 - Cancer Diagnosis May Quadruple Suicide Risk
January 20, 2019 - Parkinson’s disease experts devise a roadmap
January 20, 2019 - Research brings new hope to treating degenerative brain diseases
January 20, 2019 - Scientists pinpoint a set of molecules that wire the body weight center of the brain
January 20, 2019 - Researchers get close to developing elusive blood test for Alzheimer’s disease
January 20, 2019 - UCLA researchers demonstrate new technique to develop cancer-fighting T cells
January 20, 2019 - Researchers discover how cancer cells avoid genetic meltdown
January 20, 2019 - Exercise makes even the ‘still overweight’ healthier: study
January 20, 2019 - University of Utah to establish first-of-its-kind dark sky studies minor in the US
January 20, 2019 - School-based nutritional programs reduce student obesity
January 20, 2019 - Improved maternity care practices in the southern U.S. reduce racial inequities in breastfeeding
January 20, 2019 - New enzyme biomarker test indicates diseases and bacterial contamination
January 20, 2019 - Republican and Democratic governors have different visions to transform health care, say researchers
January 20, 2019 - Researchers discover that spin flips happen in only half a picosecond in the course of a chemical reaction
January 20, 2019 - Suicide Risk Up More Than Fourfold for Cancer Patients
January 20, 2019 - Doctors find 122 nails in Ethiopian’s stomach
January 20, 2019 - UV disinfection technology eliminates up to 97.7% of pathogens in operating rooms
January 20, 2019 - Researchers discover mechanism which drives leukemia cell growth
January 20, 2019 - AHA: Infection as a Baby Led to Heart Valve Surgery for Teen
January 20, 2019 - Injection improves vision in a form of childhood blindness
January 20, 2019 - Multiple sclerosis therapies delay progression of disability
January 20, 2019 - New study finds infrequent helmet use among bike share riders
January 20, 2019 - Clearing up information about corneal dystrophies
January 20, 2019 - Researchers describe new behavior in energy metabolism that refutes existing evidence
January 20, 2019 - New study takes first step toward treating endometriosis
January 20, 2019 - Researchers find how GREB1 gene promotes resistance to prostate cancer treatments
January 20, 2019 - Replacing Sitting Time With Activity Lowers Mortality Risk
January 20, 2019 - A simple, inexpensive intervention makes birth safer for moms and babies in parts of Africa
January 19, 2019 - New anti-inflammatory compound acts as ‘surge protector’ to reduce cancer growth
January 19, 2019 - Significant flaws found in recently released forensic software
January 19, 2019 - New Leash on Life? Staying Slim Keeps Pooches Happy, Healthy
January 19, 2019 - Men and women remember pain differently
Researchers discover link between tuberculosis and Parkinson’s disease

Researchers discover link between tuberculosis and Parkinson’s disease

image_pdfDownload PDFimage_print

The mechanism our immune cells use to clear bacterial infections like tuberculosis (TB) might also be implicated in Parkinson’s disease, according to a new collaborative study led by the Francis Crick Institute, Newcastle University and GSK.

The findings, which will be published in The EMBO Journal, provide a possible explanation of the cause of Parkinson’s disease and suggest that drugs designed to treat Parkinson’s might work for TB too.

Parkinson’s protein

The most common genetic mutation in Parkinson’s disease patients is in a gene called LRRK2, which makes the LRRK2 protein overactive.

Drugs that block LRRK2 are a promising new treatment for Parkinson’s, with many pharmaceutical companies developing drugs to target LRRK2 and clinical trials underway. But how overactive LRRK2 causes Parkinson’s and why LRRK2 blockers work was a mystery.

The biological causes of Parkinson’s remain largely unknown, making it more difficult to develop and improve treatments. Discovering a mechanism that causes Parkinson’s and how drugs affect it could significantly advance efforts to improve treatments.

Insights from TB

By studying what LRRK2 does in immune cells called macrophages that are infected with Mycobacterium tuberculosis (Mtb) – the bacterium that causes TB – researchers believe they have uncovered a potential cause of Parkinson’s.

Macrophages recognize and engulf Mtb securing it within tight-fitting internal compartments called phagosomes. Another part of the cell called the lysosome then fuses with the phagosome to destroy the bacterium inside.

Using a combination of experimental approaches, Crick and GSK researchers, in collaboration with proteomics specialist Matthias Trost from Newcastle University, found that LRRK2 prevents phagosomes from fusing with lysosomes in both human and mouse macrophages, making them less efficient at clearing bacteria. Deleting the LRRK2 gene or treating the cells with an LRRK2 blocker significantly reduced levels of Mtb.

These findings in cells were supported by experiments in mice. When the researchers deleted the gene for LRRK2 in mice, they found that they exhibited an enhanced early immune response to TB infection, and had significantly lower levels of Mtb in their lungs than control mice up to two weeks after infection.

“We think that this mechanism might also be at play in Parkinson’s disease, where abnormal masses of protein called ‘Lewy bodies’ build up in neurons in the brain and cause damage,” said Susanne Herbst, joint first author of the paper and post-doctoral fellow at the Crick.

The team suspect that LRRK2 might be preventing immune cells in the brain from degrading cell debris properly, leading to a build-up of protein in neurons that disrupts their function.

Susanne added: “By studying TB, we have found a possible explanation for why LRRK2 mutations are a genetic risk factor for Parkinson’s disease. It’s exciting when different fields of research connect up in unexpected ways like this!”

Co-author Patrick Lewis, Associate Professor in Cellular and Molecular Neuroscience at the University of Reading, said: “The dogma in the Parkinson’s field has been to focus almost exclusively on what is happening to neurons in the brain to make them degenerate. But over the last few years, there has been a growing appreciation of the integral role of other cells in the brain and particularly the immune system in keeping neurons healthy. This study reinforces why we should think more broadly about the events that cause neurodegeneration, and that some of the answers to Parkinson’s disease might come from immunology.”

New TB treatments

The findings also suggest that LRRK2 inhibitors could be a powerful new way of combating TB, which kills 1.67 million people every year.

“Drug-resistant TB is a serious emerging problem, and boosting the body’s own immune defence against TB is an important step in the battle against antibiotic resistant strains,” said Max Gutierrez, Group Leader at the Crick and senior author of the paper.

“LRRK2 inhibiting drugs are already being developed to treat Parkinson’s disease and we’re trying to see if we can repurpose them as a potential new TB therapy. This should be relatively straightforward because TB infects the lungs, so the LRRK2 inhibitors wouldn’t need to cross the blood-brain barrier like they do in Parkinson’s disease.”

Source:

https://www.crick.ac.uk/news/science-news/2018/05/22/link-between-tuberculosis-and-parkinson%E2%80%99s-disease-discovered/

Tagged with:

About author

Related Articles