New protocol to separate llama sperm without enzymatic treatment using Androcoll-E^™

Area of Science:

• Animal Reproduction
• Sperm Separation Techniques
• Llama Semen Analysis

Background:

• Separating spermatozoa from seminal plasma is crucial for assisted reproductive technologies.
• Enzymatic treatments can negatively impact sperm quality.
• Developing non-enzymatic methods for llama semen processing is needed.

Purpose of the Study:

• To design a protocol for separating llama spermatozoa from seminal plasma without enzymatic treatment.
• To evaluate the efficacy of single-layer centrifugation with Androcoll-E™ (AE) for llama semen.
• To determine optimal centrifugation parameters (volume and speed) for preserving sperm quality.

Main Methods:

• Two experiments were conducted using varying volumes of AE (4, 5, 6 ml) and centrifugation speeds (600, 800, 1000g).
• Semen samples were processed using single-layer centrifugation with AE.
• Spermatozoa quality was assessed based on motility, membrane integrity, morphology, acrosome integrity, and chromatin condensation.

Main Results:

• A 4 ml AE column at 800g maintained total sperm motility comparable to pre-treatment levels.
• Higher AE volumes (5 and 6 ml) resulted in significantly lower total sperm motility.
• Spermatozoa membrane integrity, morphology, acrosome integrity, and chromatin condensation were preserved across tested conditions (p > .05).

Conclusions:

• Single-layer centrifugation with AE effectively separates llama spermatozoa from seminal plasma without enzymatic treatment.
• The 4 ml AE column at 800g is identified as the optimal method for processing raw llama semen.
• This optimized protocol preserves essential sperm characteristics for use in reproductive biotechnologies.