Highly sensitive diagnosis of 43 monogenic forms of diabetes or obesity through one-step PCR-based enrichment in combination with next-generation sequencing. Bonnefond, A., Philippe, J., Durand, E., Muller, J., Saeed, S., Arslan, M., Martínez, R., Graeve, F. D., Dhennin, V., Rabearivelo, I., Polak, M., Cavé, H., Castaño, L., Vaxillaire, M., Mandel, J., Sand, O., & Froguel, P. Diabetes Care, 37(2):460--467, February, 2014.
doi  abstract   bibtex   
OBJECTIVE: Accurate etiological diagnosis of monogenic forms of diabetes and obesity is useful as it can lead to marked improvements in patient care and genetic counseling. Currently, molecular diagnosis based on Sanger sequencing is restricted to only a few genes, as this technology is expensive, time-consuming, and labor-intensive. High-throughput next-generation sequencing (NGS) provides an opportunity to develop innovative cost-efficient methods for sensitive diabetes and obesity multigene screening. RESEARCH DESIGN AND METHODS: We assessed a new method based on PCR enrichment in microdroplets (RainDance Technologies) and NGS using the Illumina HiSeq2000 for the molecular diagnosis of 43 forms of monogenic diabetes or obesity. Forty patients carrying a known causal mutation for those subtypes according to diagnostic laboratories were blindly reanalyzed. RESULTS: Except for one variant, we reidentified all causal mutations in each patient associated with an almost-perfect sequencing of the targets (mean of 98.6%). We failed to call one highly complex indel, although we identified a dramatic drop of coverage at this locus. In three patients, we detected other mutations with a putatively deleterious effect in addition to those reported by the genetic diagnostic laboratories. CONCLUSIONS: Our NGS approach provides an efficient means of highly sensitive screening for mutations in genes associated with monogenic forms of diabetes and obesity. As cost and time to deliver results have been key barriers to uncovering a molecular cause in the many undiagnosed cases likely to exist, the present methodology should be considered in patients displaying features of monogenic diabetes or obesity.
@article{ bonnefond_highly_2014,
  title = {Highly sensitive diagnosis of 43 monogenic forms of diabetes or obesity through one-step {PCR}-based enrichment in combination with next-generation sequencing},
  volume = {37},
  issn = {1935-5548},
  doi = {10.2337/dc13-0698},
  abstract = {OBJECTIVE: Accurate etiological diagnosis of monogenic forms of diabetes and obesity is useful as it can lead to marked improvements in patient care and genetic counseling. Currently, molecular diagnosis based on Sanger sequencing is restricted to only a few genes, as this technology is expensive, time-consuming, and labor-intensive. High-throughput next-generation sequencing (NGS) provides an opportunity to develop innovative cost-efficient methods for sensitive diabetes and obesity multigene screening.
RESEARCH DESIGN AND METHODS: We assessed a new method based on PCR enrichment in microdroplets (RainDance Technologies) and NGS using the Illumina HiSeq2000 for the molecular diagnosis of 43 forms of monogenic diabetes or obesity. Forty patients carrying a known causal mutation for those subtypes according to diagnostic laboratories were blindly reanalyzed.
RESULTS: Except for one variant, we reidentified all causal mutations in each patient associated with an almost-perfect sequencing of the targets (mean of 98.6%). We failed to call one highly complex indel, although we identified a dramatic drop of coverage at this locus. In three patients, we detected other mutations with a putatively deleterious effect in addition to those reported by the genetic diagnostic laboratories.
CONCLUSIONS: Our NGS approach provides an efficient means of highly sensitive screening for mutations in genes associated with monogenic forms of diabetes and obesity. As cost and time to deliver results have been key barriers to uncovering a molecular cause in the many undiagnosed cases likely to exist, the present methodology should be considered in patients displaying features of monogenic diabetes or obesity.},
  language = {en},
  number = {2},
  journal = {Diabetes Care},
  author = {Bonnefond, Amélie and Philippe, Julien and Durand, Emmanuelle and Muller, Jean and Saeed, Sadia and Arslan, Muhammad and Martínez, Rosa and De Graeve, Franck and Dhennin, Véronique and Rabearivelo, Iandry and Polak, Michel and Cavé, Hélène and Castaño, Luis and Vaxillaire, Martine and Mandel, Jean-Louis and Sand, Olivier and Froguel, Philippe},
  month = {February},
  year = {2014},
  pages = {460--467}
}
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