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Oxonic acid and fetal development: I. Embryotoxicity in mice
Toxicology
|November 1, 1976
Summary
Potassium oxonate (K Ox) causes early embryonic death in mice. Combined with sodium urate (Na UR), it also leads to fetal resorption and cleft palate, suggesting maternal hyperuricemia contributes to developmental toxicity.
Area of Science:
- Toxicology
- Developmental Biology
- Teratology
Background:
- Uricase inhibitors like potassium oxonate (K Ox) can induce hyperuricemia.
- The effects of induced maternal hyperuricemia on early embryonic development and fetal outcomes are not fully understood.
Purpose of the Study:
- To investigate the impact of maternal hyperuricemia induced by K Ox on embryonic and fetal development in mice.
- To determine if concurrent administration of sodium urate (Na UR) exacerbates developmental toxicity.
Main Methods:
- Pregnant mice were administered K Ox in their diet during early (days 8-10) and middle (days 10-13) gestation.
- Some groups received concurrent intravenous Na UR injections.
- Nonpregnant female mice were used to assess maternal physiological changes.
Main Results:
- K Ox alone during early gestation caused 95-98% embryonic mortality.
- Combined K Ox and Na UR treatment during middle gestation resulted in 47% fetal resorption and a 3.6% incidence of cleft palate.
- Maternal serum uric acid, potassium, and sodium levels were elevated following K Ox and Na UR treatment.
Conclusions:
- Potassium oxonate is a potent teratogen during early embryonic development in mice.
- Maternal hyperuricemia, hyperkalemia, and hypernatremia induced by K Ox and Na UR may contribute to embryonic lethality and fetal malformations.
- Further research is needed to elucidate the precise mechanisms of teratogenicity.