Objective: Hypothyroidism has been claimed to generate sexual dysfunctions such as ejaculatory disorders. Aframomum melegueta is an aphrodisiac plant with pro-ejaculatory properties. We investigated the protective eff...Objective: Hypothyroidism has been claimed to generate sexual dysfunctions such as ejaculatory disorders. Aframomum melegueta is an aphrodisiac plant with pro-ejaculatory properties. We investigated the protective effects of aqueous extract(AE) and methanolic extract(ME) of A. melegueta on the ejaculatory function of hypothyroid male rats.Methods: Forty sexually experienced male rats were partitioned into 8 groups(5 rats per group) and treated for 28 d as follows: Group 1, Control;Group 2, propylthiouracil(PTU, 10 mg/kg)+ distilled water(DW,10 m L/kg);Group 3, PTU + 5% Tween 80(10 m L/kg);Group 4, PTU + bromocriptine(6 mg/kg);Group 5,PTU + AE(20 mg/kg);Group 6, PTU + AE(100 mg/kg);Group 7, PTU + ME(20 mg/kg), and Group 8,PTU + ME(100 mg/kg). On days 0, 7, 14 and 28 of treatment, each male rat was paired with primed receptive female for measurement of ejaculatory latency time(ELT) and post-ejaculatory interval(PEI) for1.5 h. On day 29, each male rat was urethane-anesthetized and the spinal cord was transected.Thereafter, following urethral/penile stimulations and intravenous injection of dopamine, contractions of the bulbospongiosus muscles and the intraseminal pressure were registered. After these recordings,blood was collected through the catheterization of abdominal artery and plasma was used for thyroidstimulating hormone(TSH), prolactin and testosterone assays.Results: PTU-induced hypothyroidism was characterized by a significant elevation(P < 0.001) of plasmatic TSH and prolactin levels, but a decline(P < 0.001) in plasmatic testosterone, compared to untreated group. ELT, PEI, contractions of the bulbospongiosus muscles and the intraseminal pressure were also altered by PTU treatment. On the contrary, A. melegueta extracts elevated testosterone(AE, 100 mg/kg,P < 0.01;ME, 100 mg/kg, P < 0.05) and decreased prolactin(AE, 100 mg/kg, P < 0.05;ME, 20 mg/kg,P < 0.05) levels, compared to corresponding controls. With regard to DW + PTU group, prolactin concentration was lowered(P < 0.05) in rats administered with bromocriptine. Treatment with A. melegueta extracts significantly prevented the lengthening of ELT(P < 0.05) and PEI(P < 0.001). Hypothyroid state also altered the fictive ejaculation by increasing the latency and decreasing the number and frequency of bulbospongiosus muscle contractions. There was also a decrease in the intraseminal pressure. These alterations were significantly(P < 0.05) alleviated in plant extract-treated groups.Conclusion: This study highlighted the ejaculatory disturbance of hypothyroidism in male rats and its prevention with A. melegueta extracts.展开更多
Antithyroid drugs are molecules known as thionamides that inhibit thyroid hormone synthesis by interfering with thyroid peroxidase mediated iodination of tyrosine residues in thyroglobulin. These extensively used drug...Antithyroid drugs are molecules known as thionamides that inhibit thyroid hormone synthesis by interfering with thyroid peroxidase mediated iodination of tyrosine residues in thyroglobulin. These extensively used drugs are associated with a variety of well-known side effects such as anti-neutrophil cytoplasmic antibody （ANCA）-positive vasculitis, granulocytopenia and aplastic anemia. Recently, an atypical hematological finding -- bone marrow plasmacytosis, related to the use of methimazole -- was reported twice in English literatures, but bone marrow plasmacytosis with the use of propylthiouracil （PTU） has hardly been reported so far. Herein we present a case of a patient with Graves＇ disease who was initially investigated for plasma cell dyscrasia but finally diagnosed as PTU-induced bone marrow plasmacytosis with granulocytopenia and ANCA-associated vasculitis.展开更多
文摘Objective: Hypothyroidism has been claimed to generate sexual dysfunctions such as ejaculatory disorders. Aframomum melegueta is an aphrodisiac plant with pro-ejaculatory properties. We investigated the protective effects of aqueous extract(AE) and methanolic extract(ME) of A. melegueta on the ejaculatory function of hypothyroid male rats.Methods: Forty sexually experienced male rats were partitioned into 8 groups(5 rats per group) and treated for 28 d as follows: Group 1, Control;Group 2, propylthiouracil(PTU, 10 mg/kg)+ distilled water(DW,10 m L/kg);Group 3, PTU + 5% Tween 80(10 m L/kg);Group 4, PTU + bromocriptine(6 mg/kg);Group 5,PTU + AE(20 mg/kg);Group 6, PTU + AE(100 mg/kg);Group 7, PTU + ME(20 mg/kg), and Group 8,PTU + ME(100 mg/kg). On days 0, 7, 14 and 28 of treatment, each male rat was paired with primed receptive female for measurement of ejaculatory latency time(ELT) and post-ejaculatory interval(PEI) for1.5 h. On day 29, each male rat was urethane-anesthetized and the spinal cord was transected.Thereafter, following urethral/penile stimulations and intravenous injection of dopamine, contractions of the bulbospongiosus muscles and the intraseminal pressure were registered. After these recordings,blood was collected through the catheterization of abdominal artery and plasma was used for thyroidstimulating hormone(TSH), prolactin and testosterone assays.Results: PTU-induced hypothyroidism was characterized by a significant elevation(P < 0.001) of plasmatic TSH and prolactin levels, but a decline(P < 0.001) in plasmatic testosterone, compared to untreated group. ELT, PEI, contractions of the bulbospongiosus muscles and the intraseminal pressure were also altered by PTU treatment. On the contrary, A. melegueta extracts elevated testosterone(AE, 100 mg/kg,P < 0.01;ME, 100 mg/kg, P < 0.05) and decreased prolactin(AE, 100 mg/kg, P < 0.05;ME, 20 mg/kg,P < 0.05) levels, compared to corresponding controls. With regard to DW + PTU group, prolactin concentration was lowered(P < 0.05) in rats administered with bromocriptine. Treatment with A. melegueta extracts significantly prevented the lengthening of ELT(P < 0.05) and PEI(P < 0.001). Hypothyroid state also altered the fictive ejaculation by increasing the latency and decreasing the number and frequency of bulbospongiosus muscle contractions. There was also a decrease in the intraseminal pressure. These alterations were significantly(P < 0.05) alleviated in plant extract-treated groups.Conclusion: This study highlighted the ejaculatory disturbance of hypothyroidism in male rats and its prevention with A. melegueta extracts.
文摘Antithyroid drugs are molecules known as thionamides that inhibit thyroid hormone synthesis by interfering with thyroid peroxidase mediated iodination of tyrosine residues in thyroglobulin. These extensively used drugs are associated with a variety of well-known side effects such as anti-neutrophil cytoplasmic antibody （ANCA）-positive vasculitis, granulocytopenia and aplastic anemia. Recently, an atypical hematological finding -- bone marrow plasmacytosis, related to the use of methimazole -- was reported twice in English literatures, but bone marrow plasmacytosis with the use of propylthiouracil （PTU） has hardly been reported so far. Herein we present a case of a patient with Graves＇ disease who was initially investigated for plasma cell dyscrasia but finally diagnosed as PTU-induced bone marrow plasmacytosis with granulocytopenia and ANCA-associated vasculitis.
