The choice of conditions for cathepsin D activity determination in human saliva.

نویسندگان

  • W Roszkowska-Jakimiec
  • E Dabrowska
  • M Gacko
  • A Karwowska
  • M Chlabicz
چکیده

The aim of the study was the demonstration and choice of conditions for the determination of cathepsin D activity in human mixed saliva. The 6% solution of hemoglobin, denatured with hydrochloric acid, was used as the substrate. The ratio of saliva volume to hemoglobin was 4:1 w/v. The reaction was interrupted by adding 10% trichloroacetic acid, after 6 hours of incubation at 37 degrees C. The increase in degradation products was determined with the use of Folina and Ciocalteau method with copper modification.

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

بررسی میزان فعالیت آنزیم کاتپسین D در بیماران مبتلا به سرطان پستان در مقایسه با افراد سالم

Background and purpose: Breast cancer is the main cause of mortality in women Çancer patients, and Çomprises 33% of the total cancer in women. With that in mind, more than one third of the breast cancer patients refere for the treatment in the late stageof the disease. So it was decided to have a survey on the method of diagnosis in the primary stages Materials and Methods: Ïn this study,...

متن کامل

Development of an SPR imaging biosensor for determination of cathepsin G in saliva and white blood cells

Cathepsin G (CatG) is an endopeptidase that is associated with the early immune response. The synthetic compound cathepsin G inhibitor I (CGI-I) was tested for its ability to inhibit the activity of CatG via a new surface plasmon resonance imaging assay. CGI-I was immobilized on the gold surface of an SPR sensor that was first modified with 1-octadecanethiol. A concentration of CGI-I equal to 4...

متن کامل

Structural and functional characterization of two allelic variants of human cystatin D sharing a characteristic inhibition spectrum against mammalian cysteine proteinases.

Human cystatin D is a novel member of the cystatin superfamily of cysteine proteinase inhibitors present in saliva and tears. Two alleles of the cystatin D gene (CST5), encoding protein variants with either Cys or Arg as residue 26 in their 122-residue polypeptide chains, are present in the population. Expression of the two alleles was investigated by immunochemical analyses of the secreted cys...

متن کامل

Comparative analysis of the effect of preparations used in professional fluoride prophylaxis on the chosen parameters of human saliva.

UNLABELLED Regular supply of fluoride ions to the oral environment is one of the prophylactic actions against dental caries. Fluorides, whose exogenous action combines with saliva properties, condition the anticariogenic effect. Fluoride ions exhibit high chemical activity, can alter the oral environment parameters and inhibit the activity of enzymes. PURPOSE In the current study, the effect ...

متن کامل

Simple, Fast and Reliable Liquid Chromatographic and Spectrophotometric Methods for the Determination of Theophylline in Urine, Saliva and Plasma Samples

In this study, a high-performance liquid chromatographic method (HPLC) and UV spectrophotometric method were developed, validated and applied for the determination of theophylline in biological fluids. Liquid- liquid extraction is performed for isolation of the drug and elimination of plasma and saliva interferences. Urine samples were applied without any extraction. The chromatographic separat...

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:
  • Advances in medical sciences

دوره 51 Suppl 1  شماره 

صفحات  -

تاریخ انتشار 2006