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Microphthalmia

Microphthalmia is a congenital anomaly marked by unusually small eyes, frequently resulting in substantial visual impairment. As a distinguished research services company, Protheragen is dedicated to delivering expert microphthalmia diagnostics and innovative therapeutic development solutions.

Overview of Microphthalmia

Microphthalmia is a congenital ocular condition characterized by the underdevelopment of the eye, presenting as an eye that is smaller than the normal population mean. This condition can range from mild microphthalmia, where the eye is merely smaller, to severe cases, where the eye is significantly reduced or even absent (anophthalmia). The impact on vision is variable and depends on the extent of the eye's development and associated ocular abnormalities.

Flowchart for keratoconus therapeutics strategy.Fig.1 The genetics of optic cup and lens formation. (Harding P., et al., 2019)

Genetic Basis of Microphthalmia

From a scientific perspective, microphthalmia is underpinned by a complex genetic architecture. Over 90 genes have been implicated in the development of this condition, reflecting its genetic heterogeneity. Key genes associated with microphthalmia include SOX2, OTX2, RAX, VSX2, and PAX6, which play crucial roles in the orchestration of eye development. Mutations in these genes can lead to the disrupted formation and differentiation of ocular structures, resulting in the phenotypes observed in microphthalmia.

Table 1. Genes associated with anophthalmia and microphthalmia. (Harding P., et al., 2019)

Gene Name Disease Name Characteristics Syndromic
SOX2 Microphthalmia, syndromic 3 (MCOPS3) unilateral or bilateral anophthalmia, unilateral or bilateral microphthalmia no syndromic features observed, systemic features observed
OTX2 Microphthalmia, syndromic 5 (MCOPS5) unilateral or bilateral anophthalmia, unilateral or bilateral microphthalmia no syndromic features observed, systemic features observed
RAX Microphthalmia, isolated 3 (MCOP3) unilateral or bilateral anophthalmia, unilateral or bilateral microphthalmia no syndromic features observed, systemic features observed
STRA6 Microphthalmia, syndromic 9 (MCOPS9) unilateral or bilateral anophthalmia, unilateral or bilateral microphthalmia no syndromic features observed, systemic features observed
RARβ Microphthalmia, syndromic 12 (MCOPS12) unilateral or bilateral anophthalmia, unilateral or bilateral microphthalmia systemic features observed
C12orf57 Temtamy syndrome (TEMTYS) unilateral or bilateral microphthalmia systemic features observed
TENM3 Microphthalmia, isolated with coloboma 9 (MCOPCB9) unilateral or bilateral microphthalmia no syndromic features observed, systemic features observed
SMOC1 Microphthalmia with limb anomalies (MLA) unilateral or bilateral anophthalmia systemic features observed
FNBP4 Microphthalmia with limb anomalies (MLA) unilateral or bilateral anophthalmia systemic features observed

Diagnostics Development for Microphthalmia

Molecular Diagnostics

The genetic basis of microphthalmia is complex and heterogeneous, with over 90 identified genes associated with the condition. Molecular diagnostics play a crucial role in identifying the genetic underpinnings of microphthalmia. High-throughput next-generation sequencing (NGS) technologies have revolutionized the field, allowing for the identification of pathogenic variants in known genes such as SOX2, OTX2, and PAX6, which are crucial for normal eye development.

Therapeutics Development for Microphthalmia

  • Small Molecule Drugs
    The identification of genes involved in retinoic acid signaling, such as STRA6, ALDH1A3, and RARB, has opened up therapeutic perspectives for microphthalmia. Retinoic acid is essential for eye development, and its manipulation could lead to improved outcomes in patients with microphthalmia. For example, STRA6 mutations result in a spectrum of malformations, including microphthalmia. Targeting this pathway with pharmacological agents may offer a therapeutic strategy.
  • Gene Therapies
    Gene therapy offers a promising avenue for treating genetic forms of microphthalmia. By introducing a healthy copy of the gene or correcting the mutated gene, it may be possible to stimulate normal eye development. For instance, studies have shown that SOX2 plays a critical role in eye field specification, and its mutation can lead to severe microphthalmia. Gene therapy targeting SOX2 could potentially restore normal eye development in affected individuals.

Our Services

With a cutting-edge team and platform, Protheragen is at the forefront of therapeutic innovation, leveraging extensive expertise in genetic and molecular research to provide clients with specialized microphthalmia diagnostics and therapeutic development services.

Diagnostics Development

  • Karyotype Analysis Service
  • Omics Analysis Service
  • Biomarker Development Service
  • Artificial Intelligence Service

Therapeutic Development

  • Small Molecule Drug
  • Cell Therapy
  • Gene Therapy
  • Therapeutic Antibody
  • Therapeutic Peptide
  • Therapeutic Protein

Preclinical Research

  • Pharmacodynamics Study Services
  • Pharmacokinetics Study Services
  • Drug Safety Evaluation Services

Disease Models

  • SOX2 Mutant Mouse Models
  • OTX2 Mutant Mouse Models
  • RAX Mutant Mouse Models
  • VSX2 Mutant Mouse Models
  • PAX6 Mutant Mouse Models
  • rx3 Mutant Zebrafish Models
  • pax6 Mutant Zebrafish Models

Leveraging the forefront of stem cell technology, we are dedicated to investigating and addressing microphthalmia. Our focus is on harnessing the capabilities of induced pluripotent stem cells (iPSCs) to not only model the disease but also to pave the way for regenerative therapies aimed at restoring normal visual functions.

Furthermore, we excel in offering an extensive array of preclinical research services, which are crucial for the advancement of potent microphthalmia therapeutics. Our services include critical assessments such as pharmacokinetic and toxicology studies, ensuring the efficacy and safety of these therapeutics. If you are interested in our services, please feel free to contact us.

References

  • Harding, Philippa, and Mariya Moosajee. "The molecular basis of human anophthalmia and microphthalmia." Journal of developmental biology 7.3 (2019): 16.
  • Plaisancie, Julie, Patrick Calvas, and Nicolas Chassaing. "Genetic advances in microphthalmia." Journal of pediatric genetics 5.04 (2016): 184-188.