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Articles by O.A Osonuga
Total Records ( 2 ) for O.A Osonuga
  Y. Raji , M.A Gbadegesin , O.A Osonuga , Rahmat A. Adisa , O.S. Akinsomisoye , F.O Awobajo , Olufadekemi T. Kunle-Alabi , P.R.C. Esegbue Peters , I.O Osonuga and A.F. Lamidi
  Aqueous extract of Spondias mombin in different dilutions was employed to assess its impact on male reproductive, haematologic and biochemical indices of male albino rats. A single daily intragastric administration of 8.4, 16.8 and 33.6 mg kg-1 b.w day-1 of the extract for four weeks did not cause any adverse effect on body and organ weights except the weight of the liver that showed a slight increase. There was a marked dose-dependent reduction (p<0.05) in epididymal sperm progressive motility, sperm count, viability (live/dead ratio) and a dose-dependent increase (p<0.05) in percentage abnormal spermatozoa. Abnormalities like double heads, double tails, detached heads and broken tails were frequently observed. Epididymal α-glucosidase activity was significantly reduced (p<0.05). However, prostatic acid phosphatase activity and citric acid levels and seminal fructose concentrations remained unchanged following Spondias mombin treatment. Blood analysis showed that red cell and white cell counts and haematocrit (Hct) levels were in the normal range. Bilirubin, serum glutamate pyruvate transaminase (SGPT), serum glutamate oxaloacetate transaminase (SGOT), urea and protein concentrations were slightly altered by the extract of Spondias mombin. Discontinuation of the extract resulted in full recovery within four weeks of treatment cessation. The results suggest that aqueous extract of the bark of Spondias mombin has reversible antifertility action, the testis and the epididymis probably being the prime sites of action.
  Y. Raji , O.A Osonuga , S.B Olaleye , K.I. Adedokun , O.S. Akinsomisoye and O.O Mewoyeka
  Comparative reproductive activities of chloroquine, mefloquine and sulphadoxine-pyrimethamine were explored in albino Wistar rats and semen from West African Dwarf Buck (WADB) with a view to elucidating the mechanism of action of these drugs on malereproduction. Five adult male rats were administered 0.5 mL distilled water and served as the control. Five rats each were administered orally chloroquine (10 mg kg -1 b.w.), mefloquine (10 mg kg -1 b.w.) and sulphadoxine-pyrimethamine (5 mg kg -1 b.w.) orally, for four weeks. Each group had it`s own recovery group. Sperm counts, motility and morphology were reduced in rats treated with these drugs in the order mefloquine (p<0.05)> chloroquine > sulphadoxine-pyrimethamine. There was an appreciable recovery in the motility of sperms in all recovery groups. Semen samples from WADB were extended separately with chloroquine, mefloquine and sulphadoxine-pyrimethamine. Extender 1 (first control) had no PENSTRIP (Penicillin and Streptomycin combination) while extender 2 (standard extender; second control) had PENSTRIP. Semen in extenders 3, 4 and 5 were treated with chloroquine, mefloquine and sulphadoxine-pyrimethamine, respectively. Spermatozoa progressive motility in these extenders examined under the microscope at 24 h for 5 days significantly reduced in mefloquine (p<0.01), slightly with chloroquine and unchanged with sulphadoxine-pyrimethamine. The pH of the extenders was significantly reduced in duration dependent manner in mefloquine while it remained unchanged with chloroquine and sulphadoxine-pyrimethamine. The results suggest the safety of sulphadoxine-pyrimethamine and chloroquine in preservation of semen ex vivo while the negative impact of mefloquine could reside within the testis or epididymis.
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