Creative Biolabs is drawing attention to three complementary RNA profiling methods—single-cell RNA sequencing (scRNA-seq), single-nucleus RNA sequencing (snRNA-seq), and single-molecule fluorescence in situ hybridization (smFISH)—as tools to address different questions in the study of cellular heterogeneity. The company’s announcement underscores a growing recognition that no single method can capture the full complexity of gene expression across diverse cell populations, and that selecting the right approach early is critical for experimental success.
The central challenge for biomedical laboratories lies in matching a method to both the biological question and the available sample material. According to the company, an approach suited to fresh cells may not be ideal for frozen tissue, and conventional dissociation-based RNA sequencing does not retain information about the subcellular location of individual RNA molecules. These limitations can obscure rare cell populations, transient cellular states, and cell-to-cell differences that are often lost in bulk analysis.
For studies involving viable, dissociated cells, Creative Biolabs offers a single-cell RNA sequencing service that supports gene-expression analysis across individual cells. The workflow encompasses experimental planning, cell isolation, library preparation, sequencing, and data analysis, helping researchers identify distinct cell populations and investigate heterogeneity in cancer, immunology, and developmental biology. However, tissue dissociation can introduce important limitations: certain cells may be difficult to recover intact, and sample handling can alter transcriptional states.
For complex tissues, including brain specimens and samples that are difficult to dissociate, Creative Biolabs offers single-nucleus RNA sequencing. By analyzing isolated nuclei rather than intact cells, this approach can accommodate suitably preserved frozen tissues and reduce some dissociation-related biases. Still, sample suitability depends on the preservation method and the quality of the recovered nuclei, and the methods are not directly interchangeable: whole-cell and nuclear RNA profiling capture different transcript populations, and nuclei isolation can introduce method-specific biases.
Beyond expression profiling, some follow-up questions require direct visualization. Creative Biolabs’ single-molecule FISH analysis service uses fluorescently labeled oligonucleotide probes to detect selected RNA molecules in fixed cells, enabling investigation of transcript abundance and subcellular localization. Unlike transcriptome-wide sequencing, conventional smFISH typically examines preselected RNA targets and requires careful probe design, imaging, and image analysis. Its value lies in focused questions—such as determining whether a transcript is present in particular cells or where it accumulates—rather than replacing broad discovery profiling.
Together, these approaches give researchers different options for studying cellular heterogeneity. A project might use single-cell RNA sequencing to characterize accessible cells, select single-nucleus profiling when intact-cell recovery is problematic, or apply smFISH to examine the localization of priority transcripts. The appropriate strategy depends on sample suitability and the research hypothesis, and the company supports researchers in selecting approaches suited to their experimental objectives. By offering distinct profiling and visualization services, Creative Biolabs aims to help scientists avoid blind spots that arise when a single method is applied across heterogeneous samples.
