Description
The ProbeSeq Treponema pallidum LAMP Primer Design Service is a specialized molecular probe design offering developed for fluorescence-based detection of T. pallidum nucleic acids using loop-mediated isothermal amplification (LAMP). This service is intended for research teams developing molecular assays, biosensors, and point-of-care platforms focused on sexually transmitted infection (STI) research and assay development under research-use conditions.
Syphilis, caused by Treponema pallidum, remains a significant global public health concern and a priority target for improved diagnostic technologies. Molecular detection of T. pallidum presents unique challenges due to low bacterial load, limited genomic targets, and the need for high specificity to avoid cross-reactivity with commensal or related spirochetes. While LAMP offers rapid, isothermal amplification suitable for decentralized testing concepts, assay performance is highly sensitive to primer architecture and target selection. This service addresses these challenges through a structured, engineering-driven primer design workflow focused on robustness, specificity, and fluorescence signal stability.
Design Scope
Each design engagement delivers a complete LAMP primer architecture optimized for fluorescence-based detection of T. pallidum, including:
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Outer primers (F3, B3)
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Inner primers (FIP, BIP)
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Loop primers (LF, LB)
Primer sets are designed to support rapid amplification kinetics while maintaining stable and interpretable fluorescence signal development over the reaction time window.
Design Strategy
ProbeSeq applies a structured primer design and screening process tailored to the unique characteristics of T. pallidum, including:
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Selection of conserved genomic regions with diagnostic relevance
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Evaluation of primer specificity to minimize cross-reactivity with non-target spirochetes
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Thermodynamic balancing of inner and outer primers
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Screening for secondary structure formation and primerโprimer interactions
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Design constraints optimized for fluorescence-based signal monitoring
This approach is intended to reduce non-specific amplification and improve reliability during early-stage assay development.
Fluorescent Detection Compatibility
The designed primer sets are compatible with common fluorescence-based LAMP workflows, including:
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Intercalating dyeโbased fluorescence monitoring
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Real-time signal acquisition using isothermal-capable instruments
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Portable and custom fluorescence readers
Design parameters can be adjusted to align with reaction temperature limits, time-to-result requirements, and platform-specific constraints when provided.
Deliverables
Each design engagement includes:
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A complete LAMP primer set (F3, B3, FIP, BIP, LF, LB) in synthesis-ready format
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Primer naming, orientation, and target region mapping
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Design rationale outlining target selection and key constraints
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Summary of in-silico specificity and interaction analysis
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High-level guidance for initial assay testing and optimization
Optional extensions such as multiplex planning, iterative redesign based on experimental data, or adaptation for cartridge-based and point-of-care systems are available upon request.
Intended Applications
This service is suitable for research-use applications including:
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Syphilis molecular assay development
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Fluorescent LAMP feasibility and benchmarking studies
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STI point-of-care testing platform prototyping
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Microfluidic and cartridge-based assay integration
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Biosensor development and validation workflows
Limitations
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For Research Use Only (RUO)
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Not intended for diagnostic or therapeutic procedures
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Final assay performance depends on reaction chemistry, instrumentation, and user implementation
