Dr. Meier-Ewert studies various health conditions, particularly focusing on how sleep duration can influence blood pressure levels in individuals with mild hypertension. He has conducted research showing that increasing sleep by just 35 minutes each night can substantially lower blood pressure, which is crucial for reducing the risk of heart disease. In addition to blood pressure, Dr. Meier-Ewert has explored influenza C viruses, especially how different variants can persist in the body and evade treatments. His research delves into the virus's structure and interactions within cells, revealing important information on potential antiviral strategies that could improve outcomes for those at risk of influenza infections.
Key findings
Increased sleep duration led to an average decrease of 14 mmHg in systolic and 8 mmHg in diastolic blood pressure in a study with 13 participants over six weeks.
34% of AL amyloidosis patients achieved a complete response to treatment with high-dose melphalan and autologous stem cell transplantation, resulting in an average survival of 8.3 years compared to 5.9 years for non-responders.
Infection with a variant of influenza C showed a reduction in cell receptor levels, making it difficult for the virus to spread, suggesting a potential strategy for treatment.
Frequently asked questions
Does Dr. Meier-Ewert study blood pressure?
Yes, he researches how sleep duration can affect blood pressure levels in patients with mild hypertension.
What treatments has Dr. Meier-Ewert researched for influenza?
He has investigated various influenza C virus variants and the impact of specific proteins that could lead to effective antiviral treatments.
Is Dr. Meier-Ewert's work relevant to patients with AL amyloidosis?
Absolutely, his research on high-dose melphalan and stem cell transplantation provides valuable insights into treatment effectiveness and survival outcomes for these patients.
What is Dr. Meier-Ewert's focus in influenza research?
He focuses on the persistence and transmission dynamics of influenza C viruses and how they can evade treatments.
Does Dr. Meier-Ewert study infections in animals?
Yes, he has researched the presence of influenza C virus infections in animals, including dogs and pigs.
Publications in plain English
Increasing sleep duration to lower beat-to-beat blood pressure: a pilot study.
2013
Journal of sleep research
Haack M, Serrador J, Cohen D, Simpson N, Meier-Ewert H +1 more
Plain English This study looked at whether getting more sleep could help lower blood pressure in people with mild forms of high blood pressure. Over six weeks, 13 participants increased their sleep by about 35 minutes each night, leading to an average decrease in blood pressure of 14 mmHg for the top number (systolic) and 8 mmHg for the bottom number (diastolic). This is important because lowering blood pressure can help reduce the risk of heart disease and other health issues.
Who this helps: Patients with prehypertension or stage 1 hypertension.
High-dose melphalan and stem cell transplantation for patients with AL amyloidosis: trends in treatment-related mortality over the past 17 years at a single referral center.
2012
Blood
Tsai SB, Seldin DC, Quillen K, Berk JL, Ruberg FL +6 more
Outcome of AL amyloidosis after high-dose melphalan and autologous stem cell transplantation: long-term results in a series of 421 patients.
2011
Blood
Cibeira MT, Sanchorawala V, Seldin DC, Quillen K, Berk JL +10 more
Plain English This study looked at 421 patients with AL amyloidosis who received a specific treatment involving high doses of melphalan and their own stem cells. It found that 34% of patients achieved a complete response to the treatment, leading to an average survival of 8.3 years for these patients, compared to 5.9 years for those who did not achieve a complete response. Overall, this treatment has proven effective, providing good long-term outcomes for many patients, especially those who responded well.
Who this helps: This helps patients with AL amyloidosis and their doctors by providing valuable insights into treatment options and expected outcomes.
Inhibition of influenza C viruses by human MxA protein.
2000
Virus research
Marschall M, Zach A, Hechtfischer A, Foerst G, Meier-Ewert H +1 more
Plain English This study looked at how a human protein called MxA can stop different types of influenza C viruses from multiplying. The researchers found that MxA effectively reduced the growth of four strains of these viruses, which was shown by less viral genetic material and proteins being produced. This is important because it highlights a potential way to combat influenza C infections, which currently have limited treatment options.
Who this helps: This benefits patients at risk for influenza C infections.
The ORF, regulated synthesis, and persistence-specific variation of influenza C viral NS1 protein.
1999
Virology
Marschall M, Helten A, Hechtfischer A, Zach A, Banaschewski C +2 more
Plain English This study looked at a protein called NS1 from the influenza C virus to understand how it behaves in different viral strains. Researchers found that the NS1 protein is 246 amino acids long and can be modified, which affects how long the virus can persist in the body. Specifically, they discovered that a variant of the virus could express this protein for a longer time, suggesting that certain changes in the NS1 protein are linked to the virus's ability to stick around and cause ongoing infections.
Who this helps: This research benefits doctors and scientists seeking better treatments for influenza C virus infections.
Zhang X, Rosenthal PB, Formanowski F, Fitz W, Wong CH +3 more
Plain English Scientists studied the structure of a crucial protein in the influenza C virus, which is important for the virus's ability to infect cells. They used a technique called X-ray crystallography to achieve high detail images, identifying key sites on the protein that help it function; they reached a resolution of 3.2 angstroms, allowing them to clearly see the structure. This research is significant because understanding this protein can lead to better antiviral treatments and vaccines against influenza C.
Who this helps: This helps researchers and public health officials working on flu treatments and vaccines.
Influenza C virus persistence depends on exceptional steps in viral RNA synthesis and transport.
1999
Archives of virology
Zach A, Marschall M, Meier-Ewert H
Plain English This study looked at how a certain variant of the influenza C virus continues to infect cells over a long period compared to the original virus. Researchers found that the persistent virus kept producing specific RNA as long as it was in the cell, while the original virus quickly reduced its RNA production and cleared out. This is important because understanding how the persistent virus behaves can help in developing better treatments for viral infections that don’t easily go away.
Who this helps: Patients with long-lasting viral infections.
Der Hautarzt; Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete
Gall H, Beckert H, Meier-Ewert H, Tümmers U, Pust RA +1 more
Plain English Researchers studied 545 men diagnosed with urethritis over a ten-year period to identify the types of germs causing the condition. They found that 81% had high levels of white blood cells, indicating infection, and the most common germs were Chlamydia trachomatis (26%), Mycoplasma (21%), and Neisseria gonorrhoeae (18%). Understanding which germs are involved helps in effectively treating urethritis and could lead to better management of these infections, as the number of cases decreased over the study period.
Who this helps: This benefits patients experiencing urethritis and healthcare providers treating them.
A persistent variant of influenza C virus fails to interact with actin filaments during viral assembly.
1999
Virus research
Hechtfischer A, Meier-Ewert H, Marschall M
Plain English This study focused on a variant of the influenza C virus and how it acts differently in infected cells compared to the standard strain. The researchers found that the persistent variant produces low levels of new virus particles and does not interact with actin filaments in the cells, unlike the normal viruses, which form structured clusters of proteins needed for replication. This difference is important because it helps explain why some viruses can cause ongoing infections while others do not.
Who this helps: This research benefits doctors and scientists studying viral infections and developing treatments.
Persistent infection with an influenza C virus variant is dominantly established in the presence of the parental wild-type virus.
1998
Virus research
Marschall M, Helten A, Hechtfischer A, Zach A, Meier-Ewert H
Plain English Researchers studied two types of influenza C viruses to see which one could survive and replicate better during infection. They found that a variant virus (C/AA-pi) could stay alive and continue to reproduce even when faced with a large amount of the original virus (C/AA-wt); it remained persistent down to levels of 1 in 1 billion. This is important because it shows that the variant has a distinct advantage that allows it to thrive, which could affect how we treat infections caused by flu viruses.
Who this helps: This helps doctors and researchers understand how flu viruses can evade treatments, potentially improving patient care.
Structure of the haemagglutinin-esterase-fusion glycoprotein of influenza C virus.
1998
Nature
Rosenthal PB, Zhang X, Formanowski F, Fitz W, Wong CH +3 more
Plain English This research studied a vital protein from the influenza C virus called the haemagglutinin-esterase-fusion (HEF) protein, which helps the virus enter human cells. The researchers discovered the specific areas of HEF that attach to the host cells and destroy cell receptors, finding that one of these areas can bind to a unique sugar called 9-O-acetylsialic acid. Understanding the structure and functions of this protein is crucial because it could lead to better treatments or vaccines for influenza C, which affects many people.
Who this helps: This helps patients at risk for influenza C infections.
The cell receptor level is reduced during persistent infection with influenza C virus.
1997
Archives of virology
Marschall M, Meier-Ewert H, Herrler G, Zimmer G, Maassab HF
Plain English This study looked at how influenza C virus affects cells over a long period. Researchers found that cells infected with the virus had lower levels of certain proteins called receptors that the virus needs to attach and infect other cells. Specifically, they found a significant reduction in these receptors, which makes it harder for the virus to spread, but using certain treatments could help restore the receptors and increase viral activity.
Who this helps: This research helps doctors understand how influenza C persists in the body and may guide treatment strategies for patients with long-term infections.
A highly cytopathogenic influenza C virus variant induces apoptosis in cell culture.
1997
The Journal of general virology
Hechtfischer A, Marschall M, Helten A, Böswald C, Meier-Ewert H
Plain English This study focused on a variant of the influenza C virus called C/AA-cyt and its effects on certain cells in the lab. Researchers found that this virus caused significant cell damage and death, resulting in complete destruction of the cell layer used for testing when exposed to a higher dose. The study showed that this variant can induce a specific type of cell death known as apoptosis, similar to what has been observed with influenza A and B viruses.
Who this helps: This research benefits scientists and medical professionals studying influenza viruses and their effects on cells.
Comparative analysis of six European influenza vaccines.
1996
European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology
Chaloupka I, Schuler A, Marschall M, Meier-Ewert H
Plain English The study compared six different flu vaccines used in Europe during the 1994-95 season to see how they measured up in terms of their ingredients and effectiveness. It found that while all the vaccines had the required amount of a key virus protein, there were notable differences in other components, like the amount of ovalbumin, which was much higher in one vaccine and could cause allergic reactions. These findings matter because they suggest that the differences in vaccine compositions might impact how well they work and how patients react to them after getting vaccinated.
Who this helps: This helps patients, particularly those with egg allergies and health professionals choosing vaccines.
Influenza C virus RNA is uniquely stabilized in a steady state during primary and secondary persistent infections.
1996
The Journal of general virology
Marschall M, Schuler A, Meier-Ewert H
Plain English This study looked at how the influenza C virus can persist in human cells over time, which is important for understanding how the virus behaves in infections. The researchers found that the viral RNA can stay stable and "hidden" in infected cells without causing significant cell damage, allowing the virus to remain present. Specifically, they noted that this steady state was observed across different cell types, suggesting that the virus can adapt to different environments in the body.
Who this helps: This research benefits doctors and scientists working to better understand and treat influenza infections.
[Distribution of influenza C virus infection in dogs and pigs in Bavaria].
1996
Tierarztliche Praxis
Youzbashi E, Marschall M, Chaloupka I, Meier-Ewert H
Plain English This study looked at the presence of antibodies against the influenza C virus in dogs and pigs in Bavaria. It found that over half (50.6%) of the tested dogs had antibodies indicating exposure to the virus, while only 24% of younger pigs and 25.9% of slightly older pigs showed similar signs. Understanding how widely influenza C affects these animals is important for managing animal health and preventing outbreaks.
Who this helps: This benefits veterinarians and animal health workers by providing insight into the spread of the virus.
Experimental infection with a persistent influenza C virus variant leads to prolonged genome detection in the chicken lung.
1996
Acta virologica
Helten A, Marschall M, Reininger AJ, Meier-Ewert H
Plain English Researchers studied how a persistent variant of the influenza C virus infects chickens and how long its genetic material stays in the chickens' lungs. They found that the virus could be detected in the lung tissue for up to 8 days after infection and its RNA could still be found 53 days later, which shows that the virus can remain in the body for a long time. This is important because it helps us understand how some viruses can stay in hosts for long periods, potentially leading to ongoing health issues.
Who this helps: This helps doctors and researchers working on animal health and influenza viruses.
Plain English This study focused on a key protein from the influenza C virus known as HEF, which plays a crucial role in how the virus interacts with human cells. Researchers successfully created crystals of two different forms of this protein, which helped them gather detailed information about its structure. Understanding the structure of HEF is important because it could lead to better treatments and vaccines against influenza C.
Who this helps: This helps patients and healthcare providers by improving knowledge about the influenza C virus for better prevention and treatment strategies.
Nucleotide-specific PCR for molecular virus typing.
1995
Journal of virological methods
Marschall M, Schuler A, Böswald C, Helten A, Hechtfischer A +2 more
Plain English This study focused on improving a testing method for identifying different strains of the influenza C virus by looking at specific changes in its genetic material. The researchers found that a two-nucleotide change in the virus's RNA made it possible to distinguish between two related virus strains using a technique called PCR. This finding is significant because it allows for more accurate testing and monitoring of influenza viruses, which can help in tracking outbreaks and informing treatment options.
Who this helps: This benefits doctors and public health officials who need to accurately identify virus strains to manage influenza outbreaks effectively.
The persistent variant of influenza C virus carries one characteristic point mutation in RNA segment 1.
1995
Virus research
Lapatschek MS, Marschall M, Meier-Ewert H
Plain English This study looked at the influenza C virus and found that a specific mutation in its genetic material helps it persist in certain cell types but not in others. Researchers identified a unique change where one building block of the virus’s code changed, which seems crucial for its ability to continue existing in host cells. Specifically, they noticed that this change consistently occurred across different tests, suggesting that it's key to how the virus behaves.
Who this helps: This helps researchers and doctors better understand how influenza C viruses operate, which can aid in developing treatments for viral infections.
Genetic relatedness between influenza A (H1N1) viruses isolated from humans and pigs.
1994
The Journal of general virology
Neumeier E, Meier-Ewert H, Cox NJ
Plain English Researchers studied the genetic connections between influenza A viruses found in humans and pigs, focusing on samples collected from sick pigs in the U.S. and Europe during the late 1930s. They discovered that two U.S. pig viruses were closely related to a specific swine virus group from that time, while European pig viruses were more similar to early human viruses, indicating a separate evolution without gene mixing. This information is important because it helps us understand how flu viruses have changed over time and might inform future vaccine development.
Who this helps: This helps public health officials and researchers studying influenza virus transmission and vaccine strategies.
Persistent influenza C virus possesses distinct functional properties due to a modified HEF glycoprotein.
1994
The Journal of general virology
Marschall M, Herrler G, Böswald C, Foerst G, Meier-Ewert H
Plain English This study focused on a mutant strain of the influenza C virus that can persist in a cell culture environment. Researchers found that this persistent virus has a modified protein, called HEF, which allows it to attach to cells more effectively and survive longer than the normal virus. Specifically, the modified virus shows up to 10 times better ability to bind to low amounts of a specific receptor on cells, making it more infectious overall.
Who this helps: This research benefits scientists and doctors studying viral infections and developing treatments for influenza.
Productive and non-productive phases during long-term persistence of influenza C virus.
1993
The Journal of general virology
Marschall M, Böswald C, Schuler A, Youzbashi E, Meier-Ewert H
Plain English This study looked at how a type of influenza C virus stays in cells for a long time without causing continuous infection. Researchers found that while the virus can replicate and produce its proteins when it is active, it can also remain in a dormant state where it does not release new viruses. They discovered that during the active phases of infection, specific genetic material is present, while the virus can still linger in a less active form.
Who this helps: This helps researchers and healthcare professionals understand more about influenza C virus infections and how they might be treated.
Nucleotide sequence analysis of the HA1 coding portion of the haemagglutinin gene of swine H1N1 influenza viruses.
1992
Virus research
Neumeier E, Meier-Ewert H
Plain English Researchers studied the genetic make-up of a part of the swine H1N1 influenza virus to see how it compares to human H1N1 viruses. They found that two European strains of the virus (sw38 and sw39) are more closely related to human strains than to older swine strains. Understanding these differences is important because it can help in monitoring how swine influenza might evolve and potentially affect human health.
Who this helps: This helps doctors and researchers tracking influenza viruses in animals and humans.
Plain English Researchers studied virus-infected cells to see how well different antiviral treatments work. They found that specific virus markers could be detected in infected cells as soon as 12 hours after infection, and they successfully assessed the effectiveness of four antiviral agents. This new testing method closely matched traditional tests and showed that infected cells were larger than healthy ones, which could help improve how we evaluate treatments for viral infections.
Who this helps: This helps doctors and researchers in developing more effective antiviral therapies.
Formanowski F, Wharton SA, Calder LJ, Hofbauer C, Meier-Ewert H
Plain English This study looked at different strains of the influenza C virus to understand how they fuse with cell membranes. The researchers found that these strains start fusing at a pH level between 5.6 and 6.1, with some differences in their activity. Specifically, the study showed that influenza C viruses had a delay before fusion starts, unlike influenza A and B viruses, which impacts how they infect cells.
Who this helps: This helps researchers and doctors develop better treatments for infections caused by influenza C viruses.
Isolation of the influenza C virus glycoprotein in a soluble form by bromelain digestion.
1988
Virus research
Formanowski F, Meier-Ewert H
Plain English This study looked at a specific part of the influenza C virus called the spike glycoprotein to understand how it behaves when treated with a natural enzyme from pineapples called bromelain. Researchers found a soluble form of this glycoprotein that weighs about 75,000 daltons and demonstrated its ability to bind to cells and destroy certain receptors, which are important functions for the virus. This research is significant because understanding how the glycoprotein works could lead to better treatments for influenza C infections.
Who this helps: This helps patients at risk of influenza C and researchers developing antiviral treatments.
Clinical efficacy and tolerance of fleroxacin in patients with urethritis caused by Chlamydia trachomatis.
1988
The Journal of antimicrobial chemotherapy
Pust RA, Ackenheil-Köppe HR, Weidner W, Meier-Ewert H
Plain English This study examined how effective and safe the antibiotic fleroxacin is for treating patients with urethritis caused by the Chlamydia trachomatis infection. Out of 22 patients treated, 19 showed improvement, and their test results came back negative for the infection. However, some patients experienced side effects, including issues with the nervous system, stomach problems, and skin sensitivity, affecting seven individuals.
Who this helps: This benefits patients with Chlamydia-related urethritis.
In-vitro activity of fleroxacin against Chlamydia trachomatis.
1988
The Journal of antimicrobial chemotherapy
Steele-Mortimer O, Meier-Ewert H
Plain English This study looked at how effective the antibiotic fleroxacin is against the bacteria Chlamydia trachomatis compared to other antibiotics like tetracycline, erythromycin, and clindamycin. They found that fleroxacin worked similarly to clindamycin but was less effective than tetracycline and erythromycin. This is important because choosing the right antibiotic can help treat infections more effectively and reduce the spread of resistance.
Who this helps: This benefits doctors and patients dealing with chlamydia infections.
3'-Terminal sequences of influenza C virion RNA. Brief report.
1984
Archives of virology
Clern-van Haaster CM, Meier-Ewert H
Plain English This study looked at the end sections of the RNA from different strains of the influenza C virus. The researchers found that a specific sequence of 11 building blocks, "UCGUCUUCGUC," was the same in all the viruses studied. This finding is important because it helps us understand the genetic makeup of the influenza C virus, which can aid in developing better treatments or vaccines.
Who this helps: This helps researchers and public health officials working on influenza treatments and vaccines.
Plain English This study looked at how the influenza C virus produces genetic material using a specific enzyme. Researchers found that when they added a component called ApG, the rate of this genetic material production increased, similar to what happens with influenza A and B viruses. Understanding this process is important because it may help develop better treatments and vaccines for influenza C virus infections.
Who this helps: This helps patients and healthcare providers by improving knowledge about influenza viruses, which can lead to better prevention and treatment options.
Oligonucleotide fingerprint analyses of influenza C virion RNA recovered from five different isolates.
1981
Archives of virology
Meier-Ewert H, Petri T, Bishop DH
Plain English This study looked at five different strains of the influenza C virus collected from around the world over 32 years. Researchers used a method to analyze the RNA of these viruses and found that while all strains are unique, the more recently collected strains (from 1966 to 1979) showed notable similarities, unlike an older reference strain from 1949. Understanding these differences is important because it highlights how influenza C viruses behave over time, which may affect how we manage and treat infections.
Who this helps: This benefits doctors and researchers working to better understand and treat influenza infections.
Plain English This study focused on an outbreak of a mild respiratory infection in a children's hospital in Munich, where researchers identified the H1N1 influenza virus. They found that this virus closely matched a strain (USSR/90/77) that has been detected worldwide in the past two years. Understanding the strain helps in tracking and managing flu outbreaks effectively.
Who this helps: This benefits patients, especially children, by improving flu diagnosis and treatment strategies.
Plain English This study focused on the RNA segments of different strains of the influenza C virus. Researchers found up to 9 RNA pieces in the virus, with weights ranging from 2.3 to 9.4, showing that all strains had RNA that moved similarly in tests. Understanding these RNA segments is important because it helps scientists figure out how the virus works and could lead to better treatments or vaccines.
Who this helps: This benefits researchers and healthcare providers developing vaccines and treatments for influenza C.
Nakamura K, Herrler G, Petri T, Meier-Ewert H, Compans RW
Plain English This study examined the sugar components found on influenza C viruses grown in chicken kidney cells. Researchers discovered that these viruses had three main groups of sugar molecules, larger than those from influenza A viruses, with G(1) glycopeptides being unique to influenza C. This is important because understanding these sugar components could help in developing better vaccines or treatments for influenza C.
Who this helps: This benefits patients who may be at risk for influenza C infections.
[Immunity against poliomyelitis in the German Federal Republic (author's transl)].
1979
Deutsche medizinische Wochenschrift (1946)
Doerr HW, Glück H, Esser I, Firtzlaff R, Koch I +6 more
Plain English This study looked at how well people in Germany are protected against three types of the poliovirus. Researchers tested blood samples from 4,707 people aged 0 to 30 and found that 34.5% had no protection against at least one type of the virus, and 4.7% had no protection against all three types. Most concerning is that young children aged 0 to 4 years were particularly underprotected. These findings are important because they show that immunity levels against polio haven't significantly improved since similar studies in 1969 and 1972.
Who this helps: This information is important for public health officials and pediatricians.
Inhibition of influenza C virus replication by actinomycin D, alpha-amanitin, and UV irradiation.
1979
Journal of virology
Petri T, Meier-Ewert H, Compans RW
Plain English This study looked at how certain treatments affect the growth of influenza C virus. Researchers found that both actinomycin D and alpha-amanitin reduced virus production by a similar amount in a lab setting, and using UV light on cells before infection also lowered the amount of virus produced. These findings show that the way influenza C replicates is very similar to other types of influenza viruses, which is important for developing treatments.
Who this helps: This helps researchers and doctors working to treat viral infections.
Plain English This study examined the structure of influenza C viruses, specifically looking at their genetic material and proteins. Researchers found that influenza C has six RNA types, with sizes ranging from 370,000 to 1,250,000 daltons, and identified three main proteins in the virus, one of which is glycosylated. These findings help distinguish influenza C from other types of influenza and provide insights into the virus's structure, which is important for developing vaccines and treatments.
Who this helps: This research benefits scientists and healthcare providers working on influenza treatments and vaccines.
[Echo-6-virus as the pathogen of hand, foot and mouth exanthema].
1977
Der Hautarzt; Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete
Boell F, Meier-Ewert H
Plain English This study looked at seven people who had hand, foot, and mouth disease, a common illness that causes sores in those areas. Researchers found that Echovirus Type 6 was responsible for the infection in all these cases. This matters because understanding the cause can help in diagnosing and treating the disease effectively.
Who this helps: This helps patients suffering from hand, foot, and mouth disease.
Time course of synthesis and assembly of influenza virus proteins.
1974
Journal of virology
Meier-Ewert H, Compans RW
Plain English This study looked at how the influenza virus makes its proteins during different stages of infection in cells. Researchers found that while the amount of most proteins stayed relatively constant over time, the M protein increased significantly later in the infection. Importantly, proteins made early were more likely to be included in new viruses, whereas the M protein was primarily produced and added during later stages.
Who this helps: This information benefits researchers and scientists working on influenza treatments and vaccines.