Duration: 3 days -21 hours (Theory: 6h / practical: 15h)
Target audience: Beginners to Medium experienced PCR/SELEX users
Entrance qualifications: Pre-SELEX course or similar knowledge
Cost: 850€


Advanced SELEX course

Description: This introductory SELEX course consists of a theoretical part and a practical part where participants have the opportunity to carry out SELEX under experienced supervision. The course includes a comprehensive overview of different SELEX methodologies, Next Generation Sequencing, truncation studies, characterization of aptamers using binding assays as well as an introduction to aptamer based lateral flow assays.

Day 1 Systematic Evolution of Ligands by EXponential Enrichment (SELEX)

The basics of SELEX including the methods commonly used for partitioning, including the use magnetic separation, sepharose resins, microtitre plates are explained. The course details each step included in each round of SELEX, including the importance of negative and counter SELEX, strategies for generation of single stranded DNA, pilot PCR and rapid methods for monitoring evolution.

Theory (2 hours):
– Introduction to SELEX
– Different SELEX strategies
– Incubation and optimal conditions
– PCR, PCR optimization of a random library
– Preparation of single stranded DNA

Practical (5 hours): Hands-on lab running SELEX (incubation, PCR, single stranded DNA preparation).

Day2 Evolution, Next Generation Sequencing (NGS), Truncation studies

This part covers the monitoring of evolution during SELEX, which allows control and adjustment of the selection pressure and stringency to achieve the desired properties of the selected aptamers. Next Generation Sequencing and data analysis with the interpretation of results and finally determination of secondary structure and truncation studies will be also discussed.

Theory (2 hours):
– Monitoring of evolution during SELEX
– NGS and data analysis
– Truncation studies

Practical (5 hours): Hands-on lab evolution studies (APAA (Apta PCR affinity assay), SPR (Surface Plasmon Resonance), training on analysis of NGS data and truncation studies.

Day3 Binding assays or Lateral Flow Assays (LFAs)

Option A) Binding assays

The different binding assays that are routinely used to study the specificity and affinity of aptamers are described and the suitability for different types of binding assays for various types of targets is described.

Theory (2 hours):
– Different binding assays: SPR, SPRi (Surface Plasmon Resonance imaging), APAA, ELAA (Enzyme Linked aptamer Assay), EMSA (Electrophoretic Mobility Shift Assay, MST (MicroScale thermophoresis) and BLI (BioLayer Interferometry)
– Suitability of binding assays to specific targets

Practice (5 hours): Hands-on lab binding assays (SPR, SPRi, APAA, ELAA, EMSA, MST and BLI)

Option? B) Lateral Flow Assays (LFAs)

An introductory overview of lateral flow assays is provided, where the essential components of these assays and their importance is explained. Fundamental assay considerations and the implementation of aptamers in different lateral flow assay formats will be described.

Theory (2 hours): Introduction to aptamer based LFAs

Practical (5 hours): Hands-on lab competitive/sandwich aptamer based LFAs