Genetic and Molecular Investigations in Nematodes

Nematodes, and in particular Caenorhabditis elegans, have emerged as premier models for dissecting fundamental processes in genetics and molecular biology. Their compact genome, well-annotated cell lineage and amenability to reverse and forward genetics enable the interrogation of gene function in development, stress response and organismal ageing. Key approaches include high-throughput RNA interference, CRISPR–Cas9-mediated genome editing, transcriptome and proteome profiling, and advanced imaging of fluorescent reporters. Investigations span mitochondrial quality control, neuronal circuit formation, epigenetic inheritance and innate immunity, yielding insights with broad relevance to human disease, agriculture and parasitic control. The integration of genetic screens with biochemical and biophysical analyses has illuminated conserved pathways of proteostasis, signal transduction and developmental gene regulation, whilst fostering innovative toolkits for conditional manipulation of protein abundance and activity in vivo.

Research from Nature Portfolio

Recent studies have defined the cytosolic surveillance mechanisms that initiate the mitochondrial unfolded protein response (UPRmt) by integrating reactive oxygen species release and accumulation of mitochondrial precursors in the cytosol. This dual-signal paradigm reveals how mitochondrial stress is transduced to nuclear transcription factors, reinstating proteostasis. In parallel, work on activity-regulated transcriptional programmes in C. elegans neurons has uncovered the cooperative action of homeobox and AP-1 family factors (such as EGL-43 and FOS-1) in driving synaptogenesis. These factors bind directly to promoters of synaptic genes, establishing a feed-forward circuit that links neuronal activity to presynaptic assembly and function, thereby illuminating conserved genetic modules of synaptic development.

Genetic and Molecular Investigations in Nematodes publication trend

The graph below shows the total number of articles in genetic and molecular investigations in nematodes across all publications each year (not limited to Nature Index journals).

Technical terms

UPRmt: Mitochondrial unfolded protein response, a transcriptional programme activated by mitochondrial stress.

Synaptogenesis: The process by which neurons form functional synapses.

piRNA: PIWI-interacting RNA, a class of small RNAs that guide transgenerational gene silencing in the germline.

Auxin-inducible degradation (AID) system: A conditional protein depletion method that employs plant hormone-regulated ubiquitination of degron-tagged targets.

p38 MAPK pathway: A mitogen-activated protein kinase cascade (including PMK-1) regulating stress and immune responses.

References

1. A cytosolic surveillance mechanism activates the mitochondrial UPR. Nature (2023).
2. An activity-regulated transcriptional program directly drives synaptogenesis. Nature Neuroscience (2024).
3. piRNAs Can Trigger a Multigenerational Epigenetic Memory in the Germline of C. elegans. Cell (2012).
4. The auxin-inducible degradation (AID) system enables versatile conditional protein depletion in C. elegans. Development (2015).
5. p38 MAPK Regulates Expression of Immune Response Genes and Contributes to Longevity in C. elegans. PLOS Genetics (2006).