Urinary Clara cell protein and alpha 1-microglobulin – biomarkers of changes in kidney and airway function

نویسنده

  • Lena Andersson
چکیده

Validated biomarkers are useful tools for screening large populations. The benefit of screening may be improved risk assessment or early indications of adverse effects before detection or onset of symptoms. Screening is valuable in studies of environmental exposures and their effects on human health, for example after exposure to air pollution and toxic metals in our daily environment. The overall aim of this thesis was to optimize sampling of urinary Clara cell 16 kDa protein (CC16) and alpha 1-microglobulin (A1M) and test them as biomarkers of changes in kidney and airway function. For optimized sampling of urinary CC16 and A1M, timed or creatinine-corrected first morning samples are preferable. This is the time of day when the variation in excretion due to influence of urine flow and daily activities is low. For all urinary CC16 sampling, men should discard the first 100 ml to wash out post-renal excretion of CC16 before collection. Urinary and serum CC16 were tested as biomarkers of changes in the permeability of the respiratory epithelium. This was examined after exposure to wood smoke for 4 hours and compared with a session of filtered clean air for 4 hours. Exposure to wood smoke significantly increased serum CC16 after 20 hours and there was tendency towards increased urinary CC16. Both urinary CC16 and A1M are sensitive to changes in tubular function and were analysed together with another tubular biomarker, retinol-binding protein (RBP), in the urine of small children with urinary tract infection (UTI). Clara cell 16 kDa protein was significantly higher in children with upper UTI compared with children with lower UTI. Also, the association between decreased uptake of dimercaptosuccinic acid (DMSA) and increased excretion of CC16 was strong. There was no difference in A1M excretion between upper and lower UTI. In patients with community-acquired pneumonia (CAP), urinary CC16 was increased compared with the control group. By contrast, serum CC16 was decreased in patients with CAP. The increase in urinary CC16 was probably due to fever-related proteinuria since urinary A1M and RBP were also increased. The decrease in serum CC16 could be explained by increased renal excretion. Also, asthma, chronic obstructive pulmonary disease (COPD) and smoking (known to decrease serum CC16) were common among patients with CAP. In conclusion, this thesis demonstrates that both CC16 and A1M are useful biomarkers of tubular renal function. There is also a possibility to use urinary CC16 as an airway biomarker in screening studies of air pollution under the right conditions, using optimal sampling methods.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Early Detection of Renal Dysfunction in β Thalassemia with Focus on Novel Biomarkers

Improved survival among transfusion dependent thalassemia patients in recent years has led to the manifestation of morbidities such as renal dysfunction. Renal injury is still an underestimated complication in β thalassemia major patients. Chronic anemia, iron overload due to repeated transfusion, and specific iron chelators are the main factors in pathogenesis of renal dysfunction in β thalass...

متن کامل

Assessment of acute kidney injury by urinary β2-MG and NAG in pediatric cancer patients prescribed with Cisplatin, Carboplatin, and Ifosfamide as the chemotherapeutic agents

Background: Acute kidney injury (AKI) is defined as a failure in renal function leading to insufficiency of fluid and electrolyte homeostasis. Thus, sensitive biomarkers of renal tubular injury are needed to detect AKI earlier. In this study, urinary beta 2-microglobulin (β2-MG) and urinary N-acetyl-β-D-glucosaminidase (NAG) were evaluated for AKI prognosis/diagnosis in pediatric patients suffe...

متن کامل

Kidney Toxicity Induced by 13 Weeks Exposure to the Fruiting Body of Paecilomyces sinclairii in Rats

Paecilomyces sinclairiis (PS) is known as a functional food or human health supplement. However concerns have been raised about its kidney toxicity. This study was performed to investigate the kidney toxicity of PS by 13 week-oral administration to rats. Blood urea nitrogen (BUN), serum creatinine, and kidney damage biomarkers including beta-2-microglobulin (β2m), glutathione S-transferase alph...

متن کامل

Urinary Biomarkers for The Prediction of Reversibility in Acute-on-Chronic Renal Failure

BACKGROUND There is no reliable clinical test to predict the reversibility of acute-on-chronic renal failure. We study whether urinary biomarkers could be used as a noninvasive prognostic marker in patients with acute-on-chronic renal failure. METHODS We studied 39 adult patients with pre-existing chronic renal impairment presenting to us with acute-on-chronic renal failure. Urinary neutrophi...

متن کامل

Different Biomarkers of Acute kidney Injury in Cancer Patients

Acute Kidney Injury (AKI) occurs if the kidneys suddenly lose their ability to remove waste products. When the kidneys lose their ability to filter, dangerous levels of waste products can accumulate, which can upset the chemical composition of the blood and urine. Chemotherapy is one of the methods used to treat or temporarily reduce cancer by using certain medications. The main task of this tr...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2010