Vitamine tegen nierziektes bij diabetes*
Uit een eerdere studie door onderzoekers van de universiteit van Warwick was al vastgesteld dat veel diabetici een tekort hebben aan vitamine B1. Diabetici kunnen vrij snel te maken krijgen met een nierziekte waarbij kleine bloedvaatjes beschadigd raken. De bloedvaatjes in de nier vormen een soort filtertjes, waardoor een groot molecuul als het bloedeiwit albumine wordt tegengehouden en niet in de urine komt. Bij diabetici raken deze filtertjes "lek" en verschijnt er albumine in de urine, waardoor ook de kans op hartproblemen toeneemt.
In deze studie kregen 40 mensen met diabetes type 2 gedurende 3 maanden iedere dag 3x 100 mg
vitamine B1. Na 3 maanden was de uitstoot van albumine met 41% afgenomen terwijl bij 35% van de deelnemers de uitstoot weer tot normale waarden was teruggedrongen.
Thiamine reverses early diabetic kidney disease
Researchers at the University of Warwick have discovered high doses of thiamine - vitamin B1 - can reverse the onset of early diabetic kidney disease.
Kidney disease, or diabetic nephropathy, develops progressively in patients with type 2 diabetes. Early development of kidney disease is assessed by a high excretion rate of the protein albumin from the body in the urine, known as microalbuminuria.
The research is led by Dr Naila Rabbani and Professor Paul J Thornalley at Warwick Medical School, University of Warwick, in collaboration with researchers at the University of Punjab and Sheik Zaid Hospital, Lahore, Pakistan.
The team has discovered taking high oral doses of thiamine can dramatically decrease the excretion of albumin and reverse early stage kidney disease in type 2 diabetes patients.
In a paper published online in the journal Diabetologia, the team show 300 mg of thiamine taken orally each day for three months reduced the rate of albumin excretion in type 2 diabetes patients. The albumin excretion rate was decreased by 41% from the value at the start of the study. The results also showed 35% of patients with microalbuminuria saw a return to normal urinary albumin excretion after being treated with thiamine.
Forty patients with type 2 diabetes aged between 35 and 65 years old took part in the trial. They were randomly assigned a placebo or 3 x 100mg tablets of thiamine a day for three months.
The Warwick research group has already conclusively proven that type 2 diabetes patients have a thiamine deficiency. In an earlier study led by Professor Paul Thornalley at Warwick Medical School, the research team showed that thiamine deficiency could be key to a range of vascular problems for diabetes patients.
Dr Rabbani said: "This study once again highlights the importance of Vitamin B1 and we need to increase awareness. Professor Thornalley and I are planning a foundation at the University of Warwick to further education and research in thiamine deficiency."
http://www.warwick.ac.uk/ (Januari
2009)
