Genetic and Environmental Influences on Orofacial Clefts

Orofacial clefts, including cleft lip, cleft palate and combined variants, represent one of the most frequent congenital malformations. They arise through a complex interplay of genetic predispositions and environmental exposures that disrupt the normal fusion of facial processes during early embryonic development. Advances in high-throughput genomics have identified numerous susceptibility loci, revealing both common variants of modest effect and rarer sequence alterations with larger impact. Key developmental pathways – including BMP, TGF-β, SHH and WNT signalling – are subject to perturbations at the molecular level, whether through sequence variation, epigenetic reprogramming or altered gene expression. Environmental risk factors such as maternal tobacco use, nutritional deficiencies (notably folate), pharmacological agents and teratogenic compounds (for example retinoic acid) modulate these genetic networks, often via epigenetic mechanisms including DNA methylation and chromatin remodelling in cranial neural crest cells. Epidemiological studies show marked geographic and ethnic variation in incidence, underscoring the importance of gene–environment interactions. Integrative approaches combining epidemiology, multiomic profiling and functional models have begun to elucidate the molecular basis of clefting, paving the way for improved risk prediction, preventive strategies and targeted therapies.

Research from Nature Portfolio

Recent work has mapped the transcriptional dynamics of palate formation with high spatial and temporal resolution. Integration of single-nucleus, spatially resolved and bulk RNA sequencing in embryonic mouse models has pinpointed the onset of osteogenesis in the secondary palate, uncovering spatially restricted expression of osteogenic markers and niche-specific regulators. These findings furnish a detailed atlas of gene activity during palatal fusion and identify candidate biomarkers for early diagnostic and therapeutic intervention. In a foundational genetic study, a genome-wide association analysis across multiple ethnic groups has expanded the catalogue of risk loci for non-syndromic cleft lip with palate, revealing novel susceptibility regions and highlighting substantial genetic heterogeneity among sub-phenotypes and populations. Together, these investigations advance our understanding of the developmental and genetic architecture of orofacial clefts.

Genetic and Environmental Influences on Orofacial Clefts publication trend

The graph below shows the total number of articles in genetic and environmental influences on orofacial clefts across all publications each year (not limited to Nature Index journals).

Technical terms

Genome-wide association study (GWAS): An approach that scans the genome for common genetic variants to identify associations with a trait or disease.

Transcriptome-wide association study (TWAS): A method linking gene expression patterns to disease risk by integrating expression quantitative trait loci data and GWAS findings.

Osteogenesis: The biological process of bone formation critical for the development of the palatal shelves.

Mitophagy: The selective degradation of mitochondria by autophagy, important for cellular homeostasis.

Epigenetic modification: A heritable change in gene expression without alteration of the DNA sequence, often via DNA methylation or histone modification.

Non-syndromic cleft lip with or without palate (NSCL/P): A form of orofacial cleft occurring alone, not associated with other developmental anomalies.

References

1. Transcriptome‐wide association identifies KLC1 as a regulator of mitophagy in non‐syndromic cleft lip with or without palate. iMeta (2024).
2. Multimodal spatiotemporal transcriptomic resolution of embryonic palate osteogenesis. Nature Communications (2023).
3. Genome-wide analyses of non-syndromic cleft lip with palate identify 14 novel loci and genetic heterogeneity. Nature Communications (2017).
4. Sirt6 loss activates Got1 and facilitates cleft palate through abnormal activating glycolysis. Cell Death & Disease (2025).