Dr. Reynen studies how drugs affect withdrawal symptoms, specifically in animal models like rats. He has investigated how the drug diltiazem influences the discomfort experienced by rats dependent on another drug called pentobarbital. On the biotechnology side, he works with the bacterium Zymomonas mobilis, which is important in biofuel production. He has developed genetic tools that enhance the ability to express genes in this bacterium, making it more effective for various applications, including renewable energy sources.
Key findings
Rats treated with diltiazem lost about 10% of their body weight during withdrawal, compared to 5% in the placebo group.
Both treated and untreated groups showed a significant drop in water intake and increased withdrawal scores, indicating similar discomfort levels.
One expression vector developed can produce enzyme activity levels as high as 5.5 units per milligram of protein.
Frequently asked questions
Does Dr. Reynen study drug withdrawal?
Yes, he investigates how medications like diltiazem affect withdrawal symptoms in drug-dependent models.
What treatments has Dr. Reynen researched?
He studied the effects of diltiazem on withdrawal symptoms in rats.
Is Dr. Reynen's work relevant to biofuel production?
Yes, he develops genetic tools for the bacterium Zymomonas mobilis, which is used in biofuel applications.
What is Zymomonas mobilis?
It is a type of bacterium that can be engineered to produce biofuels and other products.
How does Dr. Reynen's work help scientists?
His research provides new tools for genetic engineering and insights into managing drug withdrawal.
Publications in plain English
Diltiazem alters some withdrawal signs in pentobarbital-dependent rats.
1991
Pharmacology, biochemistry, and behavior
Yutrzenka GJ, Reynen M
Plain English The research studied how the drug diltiazem affects withdrawal symptoms in rats that had become dependent on a drug called pentobarbital. The findings showed that while rats treated with diltiazem lost about 10% of their body weight during withdrawal, those given a placebo only lost about 5%. Additionally, both groups of rats had a significant drop in water intake and increased withdrawal scores, indicating similar levels of discomfort, showing that diltiazem did not improve withdrawal symptoms.
Who this helps: This research is relevant for scientists and healthcare providers looking for ways to manage drug withdrawal in patients.
Construction of expression vectors for the gram-negative bacterium Zymomonas mobilis.
1990
Molecular & general genetics : MGG
Reynen M, Reipen I, Sahm H, Sprenger GA
Plain English This study created new tools, called expression vectors, that allow scientists to introduce and work with specific genes in the bacterium Zymomonas mobilis. The researchers developed three different vectors (pPTZ1, pPTZ3, and pPTZ4) that help control how genes are expressed, and they found that one of these vectors could produce enzyme activity levels as high as 5.5 units per milligram of protein. This is important because it improves scientists' ability to use Z. mobilis for various applications, including biofuel production.
Who this helps: This benefits researchers and companies working on biofuels and biotechnology.
Comparison of the structural genes for pyruvate decarboxylase in different Zymomonas mobilis strains.
1988
Journal of bacteriology
Reynen M, Sahm H
Plain English This study looked at the gene responsible for making an enzyme called pyruvate decarboxylase in two different strains of the bacteria Zymomonas mobilis. The researchers found that the gene from one strain (ATCC 29191) is different from the gene in another strain (ATCC 31821). These differences can affect how the enzyme works, which is important for using these bacteria in making biofuels and other products.
Who this helps: This benefits researchers and companies working on biofuels and fermentation technologies.