Synthetic Peptides as Potential Antigens for Cutaneous Leishmaniosis Diagnosis

نویسندگان

  • Juliana Seger Link
  • Silvana Maria Alban
  • Carlos Ricardo Soccol
  • Gilberto Vinicius Melo Pereira
  • Vanete Thomaz Soccol
چکیده

This work's goal was to research new candidate antigens for cutaneous leishmaniosis (CL). In order to reach the goal, we used random peptide phage display libraries screened using antibodies from Leishmania braziliensis patients. After selection, three peptides (P1, P2, and P3) were synthesized using Fmoc chemistry. The peptides individually or a mixture of them (MIX) was subsequently emulsified in complete and incomplete Freund's adjuvant and injected subcutaneously in golden hamsters. Sera from the hamsters administered with P1 presented antibodies that recognized proteins between 76 and 150 kDa from L. braziliensis. Sera from hamsters which had peptides P2 and P3, as well as the MIX, administered presented antibodies that recognized proteins between 52 and 76 kDa of L. braziliensis. The research on the similarity of the peptides' sequences in protein databases showed that they match a 63 kDa glycoprotein. The three peptides and the MIX were recognized by the sera from CL patients by immunoassay approach (ELISA). The peptides' MIX showed the best performance (79% sensitivity) followed by the P1 (72% sensitivity), and the AS presented 91% sensitivity. These results show a new route for discovering molecules for diagnosis or for immunoprotection against leishmaniosis.

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

Leishmaniosis due to Leishmania infantum in a FIV and FelV positive cat with a squamous cell carcinoma diagnosed with histological, serological and isoenzymatic methods.

Leishmaniosis caused by Leishmania infantum is an endemic zoonosis present in the Mediterranean area. Canidae (dog and fox) constitute the main reservoir hosts for the parasite, whilst wild rodents or the cat can be carriers of the protozoan and are considered as secondary potential reservoirs. This paper describes a case of disseminated feline leishmaniosis with cutaneous (ulcerative), viscera...

متن کامل

The Efficacy, Relapse and Failure in the Treatment of Anthroponotic Cutaneous Leishmaniosis with Intralesional Glucantime Along with Cryotherapy

Background & Aims: It is more than half of a century that the drug of choice for treatment of cutaneous leishmaniosis (CL) has been pentavalent antimony compounds such as meglumine antimoniate (Glucantime). The aim of the present study was to evaluate the efficacy, relapse and treatment failure of intralesional Glucantime plus cryotherapy in the treatment of anthroponotic CL (ACL). Methods: The...

متن کامل

Leishmaniasis: Current Status of Vaccine Development

INTRODUCTION .......................................................................................................................................................229 Clinical Leishmaniasis ...........................................................................................................................................229 Self-limiting cutaneous and visceral leishmaniasis ...............

متن کامل

Leishmaniasis: Current Status of Vaccine Development

INTRODUCTION .......................................................................................................................................................229 Clinical Leishmaniasis ...........................................................................................................................................229 Self-limiting cutaneous and visceral leishmaniasis ...............

متن کامل

The role of toll-like receptor agonists in the immunotherapy of leishmaniosis. An update and proposal for a new form of anti-leishmanial therapy.

The use of toll-like receptor agonists in immunotherapy is a new approach in the prevention of immunosuppression during fatal Leishmania parasite infection. The objective of such immunotherapy is to activate specific cell-mediated immune responses, macrophage activation and antigen-responsive inflammation, to kill intracellular amastigotes. Toll-like receptor agonist-based treatment in immunoco...

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 2017  شماره 

صفحات  -

تاریخ انتشار 2017