title: Combination therapy of Nigella sativa and human parathyroid hormone on bone mass, biomechanical behavior and structure in streptozotocin-induced diabetic rats.
abstract: Extracts of the seeds of Nigella sativa (NS), an annual herbaceous plant of the Ranunculaceae family, have been used for many years for therapeutic purposes, including their potential anti-diabetic properties. The aim of the present study was to test the hypothesis that combined treatment with NS and human parathyroid hormone (hPTH) is more effective than treatment with NS or hPTH alone in improving bone mass, connectivity, biomechanical behaviour and strength in insulin-dependent diabetic rats. Diabetes was induced by intraperitoneal injection of streptozotocin (STZ) at a single dose of 50mg/kg. The diabetic rats received NS (2ml/kg/day, i.p.), hPTH (6microg/kg/day, i.p.) or NS and hPTH combined for 4 weeks, starting 8 weeks after STZ injection. The beta-cells of the pancreatic islets of Langerhans were examined by immunohistochemical methods. In addition, bone sections of femora were processed for histomorphometry and biomechanical analysis. In diabetic rats, the beta-cells were essentially negative for insulin-immunoreactivity. NS treatment (alone or in combination with hPTH) significantly increased the area of insulin immunoreactive beta-cells in diabetic rats; however, hPTH treatment alone only led to a slightly increase in the insulin-immunoreactivity. These results suggest that NS might be used in a similar manner to insulin as a safe and effective therapy for diabetes and might be useful in the treatment of diabetic osteopenia.
authors: Department of Civil Engineering, Faculty of Engineering, Zonguldak Karaelmas University, Zonguldak, Turkey.
authors: Mehmet Fatih
authors: MF
authors: Altan
authors: Mehmet
authors: M
authors: Kanter
authors: Senayi
authors: S
authors: Donmez
authors: Murat Emre
authors: ME
authors: Kartal
authors: Sadik
authors: S
authors: Buyukbas
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D001786:Blood Glucose / Q000378:metabolism; D001835:Body Weight / Q000187:drug effects; D001842:Bone and Bones / Q000166:cytology* / Q000187:drug effects*; D003921:Diabetes Mellitus, Experimental / Q000139:chemically induced / Q000473:pathology*; D018483:Diaphyses / Q000166:cytology / Q000187:drug effects; D005269:Femur / Q000166:cytology / Q000187:drug effects; D006801:Humans; D007150:Immunohistochemistry; D007328:Insulin / Q000097:blood; D050417:Insulin-Secreting Cells / Q000166:cytology / Q000187:drug effects; D008297:Male; D009333:Neck; D031881:Nigella sativa / Q000737:chemistry*; D010281:Parathyroid Hormone / Q000494:pharmacology*; D008517:Phytotherapy; D051381:Rats; D017208:Rats, Wistar; D013311:Streptozocin / Q000494:pharmacology
chemical_list: D001786:Blood Glucose; D007328:Insulin; D010281:Parathyroid Hormone; D013311:Streptozocin