PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Matcha mouthwash inhibits bacteria that causes periodontitis

2024-05-21
(Press-News.org) Highlights: Periodontitis is linked to tooth loss and other health concerns. Past studies suggest that green tea products can act against P. gingivalis, which causes periodontitis. In a new study, researchers tested matcha extract, made from green tea, against the pathogen. Lab studies suggest matcha inhibits the growth of the bacteria. A clinical trial showed that matcha mouthwash inhibited P. gingivalis populations in saliva. Washington, D.C.—Periodontitis is an inflammatory gum disease driven by bacterial infection and left untreated it can lead to complications including tooth loss. The disease also been associated with diabetes mellitus, preterm birth, cardiovascular disease, rheumatoid arthritis and cancer. One of the chief bacterial culprits behind periodontitis is Porphyromonas gingivalis, which colonizes biofilms on tooth surfaces and proliferates in deep periodontal pockets. 

Matcha, a finely ground green tea powder, may help keep P. gingivalis at bay. This week in Microbiology Spectrum, an open-access ASM journal, researchers in Japan report that matcha inhibited the growth of P. gingivalis in lab experiments. In addition, in a clinical study involving 45 people with periodontitis, people who used matcha mouthwash showed significantly lower levels of P. gingivalis in saliva samples than at the start of the study. “Matcha may have clinical applicability for prevention and treatment of periodontitis,” the authors noted in the paper.

Camellia sinensis is a green tea plant that has long been studied for its potential antimicrobial effects against bacteria, fungi and viruses. A previous study on mice found that green tea extract can inhibit the growth of pathogens, including Escherichia coli. Other research has found that the extract can inhibit the growth of P. gingivalis and reduce its adherence to oral epithelial cells. In addition, observational studies have associated green tea consumption with better health.

Matcha, which is used in traditional ceremonies and for flavoring in beverages and sweets, is made from raw leaves of C. sinensis. For the new study, researchers from the Nihon University School of Dentistry at Matsudo, the National Institute of Infectious Disease in Tokyo and other institutions carried out a series of in vitro experiments to test the efficacy of a matcha solution against 16 oral bacterial species, including 3 strains of P. gingivalis. The matcha mouthwash showed little activity against strains of commensal oral bacteria. 

Within 2 hours, nearly all the cultured P. gingivalis cells had been killed by the matcha extract, and after 4 hours of exposure, all the cells were dead. Those findings suggested a bactericidal activity against the pathogen. 

The researchers then recruited 45 people diagnosed with chronic periodontitis at the Nihon University Hospital School of Dentistry at Matsudo for a follow up clinical study. The patients were randomly assigned to 3 groups: One group received barley tea mouthwash, the second received the mouthwash made from matcha extract, and the third received mouthwash that included sodium azulene sulfonate hydrate, which is used to treat inflammation. Saliva samples were collected before and after the intervention and analyzed using PCR, and participants were instructed to rinse twice daily. 

The analysis revealed that patients in the group that used matcha mouthwash showed a significant reduction in the level of P. gingivalis. Patients in the other 2 groups did not show that same significant reduction.

While the new study isn’t the first to probe the antimicrobial effects of tea-derived compounds on P. Gingivalis, the researchers note that it does support the potential benefits of matcha as part of a treatment plan for people with periodontal disease. 
 

###

The American Society for Microbiology is one of the largest professional societies dedicated to the life sciences and is composed of 36,000 scientists and health practitioners. ASM's mission is to promote and advance the microbial sciences.

ASM advances the microbial sciences through conferences, publications, certifications, educational opportunities and advocacy efforts. It enhances laboratory capacity around the globe through training and resources. It provides a network for scientists in academia, industry and clinical settings. Additionally, ASM promotes a deeper understanding of the microbial sciences to diverse audiences.

END


ELSE PRESS RELEASES FROM THIS DATE:

Oncology events in Poland solidify collaboration with NCCN

Oncology events in Poland solidify collaboration with NCCN
2024-05-21
WARSAW, POLAND [May 21, 2024] — The National Comprehensive Cancer Network® (NCCN®)—a global nonprofit responsible for leading cancer treatment guidelines—is taking part in two events in Warsaw focused on advancing cancer care and highlighting the Poland-US bilateral achievements in health care from May 21-22, 2024. The meetings will be organized by Maria Sklodowska-Curie National Research Institute of Oncology, the Polish Oncological Society, and the Alliance for Innovation. ...

City of Hope awarded $5.4 million CIRM grant to create a stem cell laboratory and expand access to state-of-the-art disease models and technology among a diverse scientific community

City of Hope awarded $5.4 million CIRM grant to create a stem cell laboratory and expand access to state-of-the-art disease models and technology among a diverse scientific community
2024-05-21
LOS ANGELES — City of Hope®, one of the largest cancer research and treatment organizations in the United States, has been awarded $5.4 million from the California Institute for Regenerative Medicine (CIRM) to build and fund a stem cell research laboratory on its Duarte, California, campus that will further expand its scientific capabilities. The mission of the unique Stem Cell-Based Disease Modeling Laboratory is two-fold. First, it will advance stem cell-based disease modeling to spur innovation in regenerative medicine. The laboratory leverages City of Hope’s infrastructure ...

Meeting preview: Hot topics at NUTRITION 2024

2024-05-21
Thousands of top nutrition experts will gather next month for a dynamic program of research announcements, policy discussions and award lectures at NUTRITION 2024, the annual flagship meeting of the American Society for Nutrition. Reporters and bloggers are invited to apply for a complimentary press pass to attend the meeting in Chicago from June 29–July 2.   Explore the meeting schedule and register for a press pass to attend.   Hot topics to be explored at NUTRITION 2024 include:   Diet and cancer ...

Study models how ketamine’s molecular action leads to its effects on the brain

Study models how ketamine’s molecular action leads to its effects on the brain
2024-05-21
A World Health Organization Essential Medicine, ketamine is widely used at varying doses for sedation, pain control, general anesthesia and as a therapy for treatment-resistant depression. While scientists know its target in brain cells and have observed how it affects brain-wide activity, they haven’t known entirely how the two are connected. A new study by a research team spanning four Boston-area institutions uses computational modeling of previously unappreciated physiological details to fill that gap and offer new insights into how ketamine works. “This modeling work has helped decipher likely mechanisms through which ...

A diaspora-based model of human migration

A diaspora-based model of human migration
2024-05-21
How do migrants choose their destinations? Existing models, known as “gravity models,” use population size and travel distance as explanatory variables—and often fail, especially at the neighborhood scale. Many migrants prefer to move to a location near friends, family, or co-nationals. This pattern might be partly driven by factors that repeat (such as the cost of living) and partly driven by homophily, the tendency to interact with similar others. Early migrants tend to reduce uncertainty and provide information for later arrivals. Building on these observations, Rafael Prieto-Curiel and colleagues construct a migration model based on the power of the diaspora to ...

Black and Hispanic Americans experience wider temperature swings

Black and Hispanic Americans experience wider temperature swings
2024-05-21
Extreme heat can harm human health, but so can temperature extreme swings. Large daily temperature variation (DTV) has been associated with elevated mortality in studies around the world. Trees and other vegetation can lower DTV, as trees reduce temperature through transpiration during the day and also trap long-wave radiation in the atmosphere under the canopy at night, increasing temperature. But green space is not equally distributed in most cities. Shengjie Liu and Emily Smith-Greenaway examined inequality in DTV exposure in the US, using monthly nighttime and daytime land surface temperature data from satellites. ...

Gamers say they hate ‘smurfing,’ but admit they do it

2024-05-21
COLUMBUS, Ohio – Online video game players believe the behavior known as “smurfing” is generally wrong and toxic to the gaming community – but most admit to doing it and say some reasons make the behavior less blameworthy, new research finds.   The new study suggests that debates about toxicity in gaming may sometimes be more complex and nuanced than is often acknowledged, according to the researchers.   Online video games use what are called “matchmaking systems” to pair players based on skill. “Smurfing” is when players cheat these systems by creating new accounts so that they can play against people lower ...

How immune cells recognize the abnormal metabolism of cancer cells

2024-05-21
When cells become tumor cells, their metabolism changes fundamentally. Researchers at the University of Basel and the University Hospital Basel have now demonstrated that this change leaves traces that could provide targets for cancer immunotherapies. Cancer cells function in turbo mode: Their metabolism is programmed for rapid proliferation, whereby their genetic material is also constantly copied and translated into proteins. As researchers led by Professor Gennaro De Libero from the University of Basel and the University ...

How plants mate for life and repel other suitors

How plants mate for life and repel other suitors
2024-05-21
A group of scientists from Nagoya University in Japan has used a specialized microscopic technique to observe the internal reproduction process of the Arabidopsis plant. Their findings, published in EMBO Reports, reveal the mechanism behind a female flower selectively attracting a single male counterpart. These findings provide insights that may help optimize seed production and improve agricultural breeding practices. Angiosperms, commonly referred to as flowering plants, have male and female reproductive organs. In the process of plant reproduction, when a pollen grain that ...

3D printing robot uses AI machine learning for US Army research

3D printing robot uses AI machine learning for US Army research
2024-05-21
Inside a lab in Boston University’s College of Engineering, a robot arm drops small, plastic objects into a box placed perfectly on the floor to catch them as they fall. One by one, these tiny structures—feather-light, cylindrical pieces, no bigger than an inch tall—fill the box. Some are red, others blue, purple, green, or black.  Each object is the result of an experiment in robot autonomy. On its own, learning as it goes, the robot is searching for, and trying to make, an object with the most efficient ...

LAST 30 PRESS RELEASES:

Discovery of spontaneous inflow and outflow states of high-temperature plasma by energetic ions

Tax the rich, say a majority of adults across 17 G20 countries surveyed

Semaglutide leads to greater weight loss in women than men with HF, improves HF symptoms in both sexes

12.5, the 1st Impact Factor of COMMTR released!

Circadian clock impact on cluster headaches funded by $2.4M NIH grant for UTHealth Houston research

Study identifies first drug therapy for sleep apnea

How old is your bone marrow?

Boosting biodiversity without hurting local economies

ChatGPT is biased against resumes with credentials that imply a disability — but it can improve

Simple test for flu could improve diagnosis and surveillance

UT Health San Antonio researcher awarded five-year, $2.53 million NIH grant to study alcohol-assisted liver disease

Giving pre-med students hands-on clinical training

CAMH research suggests potential targets for prevention and early identification of psychotic disorders

Mapping the heart to prevent damage caused by a heart attack

Study challenges popular idea that Easter islanders committed ‘ecocide’

Chilling discovery: Study reveals evolution of human cold and menthol sensing protein, offering hope for future non-addictive pain therapies.

Elena Beccalli, new rector of Università Cattolica del Sacro Cuore, takes office on 1st July

Pacific Northwest Research Institute uncovers hidden DNA mechanisms of rare genetic diseases

Empowering older adults: Wearable tech made easier with personalized support

Pennington Biomedical researchers partner on award-winning Long Covid study

Cooling ‘blood oranges’ could make them even healthier – a bonus for consumers

Body image and overall health found important to the sexual health of older gay men, according to new studies

Lab-grown muscles reveal mysteries of rare muscle diseases

Primary hepatic angiosarcoma: Treatment options for a rare tumor

Research finds causal evidence tying cerebral small-vessel disease to Alzheimer’s, dementia

Navigating the Pyrocene: Recent Cell Press papers on managing fire risk

Restoring the Great Salt Lake would have environmental justice as well as ecological benefits

Cannabis, tobacco use, and COVID-19 outcomes

A 5:2 intermittent fasting meal replacement diet and glycemic control for adults with diabetes

Scientists document self-propelling oxygen decline in the oceans

[Press-News.org] Matcha mouthwash inhibits bacteria that causes periodontitis