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The objective of this study was to investigate whether medical therapy can reduce sperm aneuploidy levels and irfiprove the results of intracytoplasmic sperm injection （ICSI） in patients with severe idiopathic oligoasthenoteratospermia （OAT）. Thirty-three infertile couples requiring ICSI because of severe idiopathic OAT after at least one unsuccessful ICSI cycle were considered. Semen parameters （concentration, motility and morphology）, the percentage of aneuploid sperm and the results of ICSI （the number of oocytes fertilized, embryos transferred, biochemical pregnancies, clinical pregnancies and live births） were compared before and after a 3-month course of treatment with L-carnitine 1 g given twice per day＋acetyI-L-carnitine 500 mg given twice per day＋one 30-mg cinnoxicam tablet every 4 days. Aneuploidy was assessed using fluorescent in situ hybridisation （FISH） performed on chromosomes X, Y, 13, 15, 16, 17, 18, 21 and 22. The results showed that 22 of the 33 patients had a reduced frequency of aneuploid sperm and improved sperm morphology after treatment （group 1）, and 11 showed no change （group 2）. The numbers of biochemical pregnancies, clinical pregnancies and live births were significantly higher in group I than in group 2. No significant difference was found between the groups regarding the numbers of oocytes fertilized and embryos transferred. The side effects were negligible. The numbers of ICSI pregnancies and live births in severe idiopathic OAT patients improved with a course of L-carnitine, acetyI-L-carnitine and cinnoxicam.

Several studies have demonstrated that L-carnitine exhibits neuroprotective effects on injured sciatic nerve of rats with diabetes mellitus. It is hypothesized that L-carnitine exhibits neuro-protective effects on injured sciatic nerve of rats. Rat sciatic nerve was crush injured by a forceps and exhibited degenerative changes. After intragastric administration of 50 and 100 mg/kg L-carnitine for 30 days, axon area, myelin sheath area, axon diameter, myelin sheath diameter, and numerical density of the myelinated axons of injured sciatic nerve were similar to normal, and the function of injured sciatic nerve also improved signiifcantly. These ifndings suggest that L-carnitine exhibits neuroprotective effects on sciatic nerve crush injury in rats.

[Objective] To study the antioxidant effects of LC on D-galactose induced aging mice. [Method] 50 mice were randomly divided into blank control group, D-galactose model group, LC treatment groups at three levels of 0.25, 0.5 and 1.0 g/（kg d）, a total of 5 groups. Using the subacute D-galactose induced aging models, the mice were killed after 6 weeks of experiment and the activity of Superoxide dismutase （SOD）, Glutathione peroxidase （GSH-Px） and Malondialdehyde （MDA） content in plasma, brain and liver tissue were determined. [ Result.] The activity of SOD and GSH-Px in plasma, brain and liver tissue were significantly increased after treated with LC, while the content of MDA were decreased with a dose-dependent manner. [ Conclusion] LC had anti-aging effects in mice, and the mechanism may be correlated with the antioxidation.

[Objective] To study the effects of L-carnitine （LC） on lowering the high blood lipid and antioxidation in hyperlipidemia rats. [Method] 50 healthy SD rats were randomly divided into 5 groups. They were fed with standard diet, high-cholesterol diet and high-cholesterol diet with 0.25, 0.5, 1.0 g/（ kg · d） LC. After the LC groups were consecutively orally administered LC for 28 days, rat serum total cholesterol （ TC）, triglyceride （TG）, high density lipoprotein （ HDL-C）, low density lipoprotein （LDL-C） content, as well as super oxide dismutase （SOD） activity and malondial- dehyde （MDA） content in serum and liver were determined. [ Reset~ Compared with the high-fat model group, LC could significantly reduce the se- rum TC, TG, LDL-C levels, increase HDL-C level, and enhance SOD activity in serum and liver, decrease the content of MDA （ P 〈0.05）. [ Con- Clusion] LC might have a significant role in lowering the high blood lipid and improving internal antioxidant capacity in hyperlipidemia rats.