With Glycyrrhizae Radix et Rhizoma-Gypsum Fibrosum drug pair as the research object, supramolecular chemistry of traditional Chinese medicine(TCM) was used to study differences between the compatibility of herbal medicine Glycyrrhizae Radix et Rhizoma with mineral medicine Gypsum Fibrosum and its main component CaSO_4·2H_2O, so as to preliminarily discuss the scientific connotation of compatibility of Gypsum Fibrosum in clinical application. A Malvern particle sizer, a scanning electron microscope(SEM), and a conductivity meter were used to observe and determine the physical properties such as microscopic morphology, particle size, and conductivity of Gypsum Fibrosum, CaSO_4·2H_2O, and water decoctions of them with Glycyrrhizae Radix et Rhizoma. An inductively coupled plasma optical emission spectrometer(ICP-OES) was employed to detect the inorganic metal elements in Glycyrrhizae Radix et Rhizoma-Gypsum Fibrosum and Glycyrrhizae Radix et Rhizoma-CaSO_4·2H_2O. Isothermal titration calorimetry(ITC) was conducted to quantify the interactions of Gypsum Fibrosum and CaSO_4·2H_2O with Glycyrrhizae Radix et Rhizoma. A Fourier transform infrared spectrometer(FTIR) was used to analyze the characteristic absorption peak change of Glycyrrhizae Radix et Rhizoma-Gypsum Fibrosum and Glycyrrhizae Radix et Rhizoma-CaSO_4·2H_2O. X-ray diffraction(XRD) was performed to determine the crystal structure and phase composition of Glycyrrhizae Radix et Rhizoma-Gypsum Fibrosum and Glycyrrhizae Radix et Rhizoma-CaSO_4·2H_2O. Further, glycyrrhizic acid(GA) was substituted for Glycyrrhizae Radix et Rhizoma to co-decoct with Gypsum Fibrosum, CaSO_4·2H_2O, and freeze-dried powder of their respective water decoctions. The results of XRD were used for verification analysis. The results showed that although CaSO_4·2H_2O is the main component of Gypsum Fibrosum, there were significant differences between their decoctions and between the decoctions of them with Glycyrrhizae Radix et Rhizoma. Specifically,(1) Both CaSO_4·2H_2O and Gypsum Fibrosum were amorphous fibrous. However, the particle size and conductivity were significantly different between the decoctions of CaSO_4·2H_2O and Gypsum Fibrosum alone.(2) Under SEM, Glycyrrhizae Radix et Rhizoma-CaSO_4·2H_2O was a hybrid system with various morphologies, while Glycyrrhizae Radix et Rhizoma-Gypsum Fibrosum presented uniform nanoparticles.(3) The particle sizes and conductivities of Glycyrrhizae Radix et Rhizoma-CaSO_4·2H_2O and Glycyrrhizae Radix et Rhizoma-Gypsum Fibrosum were significantly different and did not follow the same tendency as those of the decoctions of CaSO_4·2H_2O and Gypsum Fibrosum alone.(4) Compared with Glycyrrhizae Radix et Rhizoma-CaSO_4·2H_2O, Glycyrrhizae Radix et Rhizoma-Gypsum Fibrosum had stronger molecular binding ability and functional group structure change.(5) The crystal form was largely different between the freeze-dried powder of CaSO_4·2H_2O decoction and Gypsum Fibrosum decoction, and their crystal forms were also significantly different from those of the freeze-dried powder of Glycyrrhizae Radix et Rhizoma-CaSO_4·2H_2O and Glycyrrhizae Radix et Rhizoma-Gypsum Fibrosum decoctions. The reason for the series of differences is that Gypsum Fibrosum is richer in trace elements than CaSO_4·2H_2O. The XRD results of GA-Gypsum Fibrosum and GA-CaSO_4·2H_2O decoctions further prove the importance of trace elements in Gypsum Fibrosum for supramolecule formation. This research preliminarily reveals the influence of compatibility of Gypsum Fibrosum or CaSO_4·2H_2O on decoction phase state, material form, and crystal form, providing a basis for the rational clinical application of Gypsum Fibrosum.
Drugs, Chinese Herbal/chemistry* ; Calcium Sulfate/chemistry* ; Glycyrrhiza/chemistry* ; Crystallization ; Particle Size ; Medicine, Chinese Traditional ; Rhizome/chemistry*

OBJECTIVETo prepare a novel strontium-containing calcium sulfate and assess its and biocompatibility.

METHODSA novel strontium-containing α-calcium sulfate hemihydrate (Sr-caS) bone substitute as prepared with hydrothermal reaction and examined for X-ray diffraction (XRD), Fourier transform infrared (FTIR) and thermogravimetric differential scanning calorimetric (TG-DSC) patterns. The biocompatibility of the material was evaluated by in vitro cytotoxicity test in L-929 cells, hemolysis test of blood, and in vivo implantation test in SD rats.

RESULTSThe XRD spectra of the prepared Sr-CaS powder highlighted 3 strong characteristic peaks of α-CaSO4 at 14.63°, 25.72° and 29.80° with a strontium-specific peak at 24.78°. The FTIR patterns of Sr-CaS resembled those of CaS. TG-DSC results showed that the material contained a non-evaporable water content of 6.03%. In vitro cytotoxicity test in L-929 cells suggested that the material had a class 1 cytotoxicity, and the hemolysis rate of its aqueous extract was 4.3%. The material implanted in the muscular tissues of SD rats maintained a steady state in the surrounding tissues.

CONCLUSIONThis strontium-containing calcium sulfate material we prepared shows an excellent biocompatibility for potential use as a novel artificial bone material.

Animals ; Biocompatible Materials ; chemistry ; Bone Substitutes ; chemistry ; Calcium Sulfate ; chemistry ; Cell Line ; Mice ; Microscopy, Electron, Scanning ; Prostheses and Implants ; Rats ; Rats, Sprague-Dawley ; Spectroscopy, Fourier Transform Infrared ; Strontium ; chemistry ; X-Ray Diffraction

OBJECTIVEMahuang-Shigao herb-pair is a famous formula composed of Ephedra and Gypsum. The herb-pair is frequently used for treating cold symptoms and bronchial asthma in the clinical practice of Chinese medicine (CM). In the present study, we evaluated evidence for the benefit of combined use of Ephedra and Gypsum by analyzing the antipyretic and anti-asthmatic activities of Ephedra-Gypsum.

METHODSThe antipyretic effects of Ephedra-Gypsum were evaluated in yeast-induced hyperthermia test. Thirty male Wistar rats were randomly divided into 5 groups, including control group, standard aspirin group, and 3 Ephedra- Gypsum groups of different doses (6, 12, 24 g/kg). Ephedra-Gypsum extract and asprin were administered orally 6 h after the injection of yeast solution and body temperature was measured every 1 h for 8 h. The antiasthmatic effects of Ephedra-Gypsum were evaluated using an ovalbumin (OVA)-induced asthmatic rat model. Thirty-six male SD rats were randomly divided into 6 groups. Rats were alternately sensitized and OVA+Al(OH) challenged by exposure to mists of ovalbumin. Ephedra-Gypsum extracts (6, 12, 24 g/kg) or dexamethasone were administered 45 min prior to the allergen challenge for 8 days. Latent period and the weight of wet to dry ratio of lung were determined. In addition, the eosinophils in blood and white blood cell (WBC) were counted by an YZ-Hemavet Analyzer.

RESULTSThe Ephedra-Gypsum extracts at test dose (6, 12, 24 g/kg) significantly and dose-dependently attenuated yeast-induced fever in rats. The Ephedra-Gypsum extracts also prolonged the latent period, reduced OVA-induced increases in eosinophils and WBC, and decreased the wet and dry weight ratio of the lungs in the anti-asthmatic test.

CONCLUSIONSThese findings indicate that the Ephedra-Gypsum extract has antipyretic and anti-asthmatic properties. Hence, the results support additional scientific evidence in prescriptions.

Alkaloids ; analysis ; Animals ; Anti-Asthmatic Agents ; therapeutic use ; Antipyretics ; therapeutic use ; Asthma ; drug therapy ; Calcium Sulfate ; therapeutic use ; Drugs, Chinese Herbal ; therapeutic use ; Ephedra ; chemistry ; Fever ; drug therapy ; Lung ; drug effects ; pathology ; Male ; Organ Size ; drug effects ; Ovalbumin ; Plant Extracts ; therapeutic use ; Rats, Sprague-Dawley ; Rats, Wistar

In this study, UPLC-MS/MS was adopted to determine the contents of five ephedrine alkaloids (Norephedrine, Norpseudoephedrine, Ephedrine, Pseudoephedrine, Methylephedrine) in plasma and urine in rats after the combined administration of Ephedrae Herba-Gypsum Fibrosum and calculate relevant pharmacokinetic parameters, in order to discuss the effect of the combined administration of Ephedrae Herba-Gypsum Fibrosum on plasma pharmacokinetics and urinary excretion characteristics. According to the results, after being combined with Gypsum, the five ephedrine alkaloids showed similar pharmacokinetic changes, such as shortened t(max), accelerated absorption rate, but reduced AUC(0-t) and V(z)/F, which may be related to the increase in urine excretion. Besides, Gypsum was added to enhance C(max) of Pseudoephedrine and prolong MRT(0-t) of Methylephedrine, so as to enhance the anti-asthmatic effect of Ephedrae Herba and resist the toxic effect of Norephedrine and Ephedrine. This study proved the scientific compatibility of Ephedrae Herba-Gypsum Fibrosum and provided a reference for studies on the prescription compatibility regularity and relevant practices.
Alkaloids ; blood ; pharmacokinetics ; urine ; Animals ; Calcium Sulfate ; pharmacokinetics ; Drugs, Chinese Herbal ; pharmacokinetics ; Ephedra ; chemistry ; Male ; Rats ; Rats, Sprague-Dawley ; Urine ; chemistry

BACKGROUNDCavity reconstruction after benign bone tumor removal is varied and controversial. Allograft is widely used but is associated with complications. New bone substitutes, such as calcium sulfate artificial bone, have been introduced for bone tumor operation. However, the bone healing response of artificial bone has not been compared with allograft bone. We therefore compared calcium sulfate grafts (study group) with bone allografts (control group) for the treatment of benign bone tumors.

METHODSWe retrospectively reviewed 50 patients who underwent calcium sulfate reconstruction and 50 patients who underwent allograft cancellous bone reconstruction. The two groups were well matched. The mean follow-up time of the study group was 19.9 (12-55) months. We investigated bone healing response, complications, and factors affecting bone healing.

RESULTSAt the last follow-up, 84% (42/50) of cases in the study group and 62% (31/50) of cases in the control group had achieved clinical healing (P = 0.013). The initial healing rate showed no significant difference between the two groups (100% vs. 96%, P = 0.153). The mean healing times for calcium sulfate and allograft bone were 9.6 (3-42) months and 13.8 (3-36) months, respectively (P < 0.01). Complications in the study group were minor and resolved. Implant volume was a significant factor affecting bone healing.

CONCLUSIONThe calcium sulfate bone substitute showed a satisfactory healing outcome and safety profile in reconstruction of bone defects after benign bone tumor curettage, especially in smaller cavities.

Adolescent ; Adult ; Aged ; Allografts ; Bone Neoplasms ; surgery ; Calcium Sulfate ; chemistry ; Child ; Curettage ; methods ; Female ; Humans ; Male ; Middle Aged ; Reconstructive Surgical Procedures ; methods ; Retrospective Studies ; Young Adult

OBJECTIVETo investigate the growth activity of osteoblast on a novel strontium incorporated calcium sulfate and make comparison with normal calcium sulfate material.

METHODSOsteoblast was inoculated on samples and cell proliferation was measured on the 1st, 3rd, 5th days, and the activities of ALP and osteocalcin were observed on the 5th day. And microcosmic morphology of osteoblast was observed by scanning electron microscopy(SEM).

RESULTSOsteoblast grows robustly on tested material. Cell quantity on the surface of novel material was obviously higher than normal calcium sulfate material (P < 0.05). The activity of ALP and osteocalcin on novel material was 57.8% and 40.2% higher than on normal calcium sulfate material respectively (P < 0.05). On strontium incorporated surface, osteoblast spread well. Cells were polygonal with abundant cytoplasm and the morphology was active.

CONCLUSIONStrontium incorporated calcium sulfate can sustain robust growth activity of osteoblast, which is promising to be used for bone substitute materials.

3T3 Cells ; Alkaline Phosphatase ; metabolism ; Animals ; Bone Substitutes ; chemistry ; pharmacology ; Calcium Sulfate ; chemistry ; pharmacology ; Cell Proliferation ; drug effects ; Mice ; Osteoblasts ; cytology ; drug effects ; metabolism ; Osteocalcin ; metabolism ; Strontium ; chemistry

We examined the biocompatibility and the safety of a-calcium sulfate hemihydrate (CSH)/multi-walled carbon nanotube (MWCNT) composites for bone reconstruction application. The biocompatibility of the CSH/MWCNT composites was evaluated by the measures which taking L929 fibroblast cells cultured in the extracted liquid of the composite soaking solution and putting bone marrow stromal cells planted on the composite pellets in vitro, respectively. The cell proliferation was evaluated by MTT test and further observed using an inverted optical microscope and a scanning electric microscope. The toxicity of the composites was evaluated by acute and subacute systemic toxicity test. Long-term muscle and bone implantation in vivo tests were also conducted. L929 fibroblast cells grew well in the extracted liquid, as well as bone marrow stromal cells that could adhere on the surface of sample pellets and proliferated rapidly. MTT test showed that there were no significant differences between the experimental and control groups (P > 0.05). In vivo test manifested that the composites were no toxicity, no irritation to skin and good for bone defect reconstruction. It was proved that a-calcium sulfate hemihydrate (CSH)/multi-walled carbon nanotube (MWCNT) composites exhibited excellent biocompatibility for the potential application in bone tissue engineering.
Animals ; Biocompatible Materials ; chemistry ; Bone Marrow Cells ; cytology ; Bone Substitutes ; chemical synthesis ; chemistry ; Calcium Sulfate ; chemistry ; Cell Line ; Cell Proliferation ; Fibroblasts ; cytology ; Materials Testing ; Nanotubes, Carbon ; chemistry ; Rabbits ; Stromal Cells ; cytology ; Tissue Engineering ; methods ; Toxicity Tests

OBJECTIVETo establish a method for the determination of gypsum and magnesium in decoction by capillary zone electrophoresis and study the influence of different compatibility on the contents of calcium and magnesium dissolution.

METHODNine decoctions with gypsum were prepared and analysed by L9 (3(4)) orthogonal design and the contents of calcium and magnesium ions were determined by the set method. The conditions of the experiment were a running buffer of 6.4 mmol x L(-1) imidazole solution (glacial acetic acid ajusted pH to 3.50) and an applied voltage of 10 kV (room temperature). Samples were introduced by hydrodynamic injection (8 cm x 7 s) and determined with on-column UV monitoring at 214 nm. Copper sulphate was chosen as the internal standard.

RESULTSThe linear responses covered the range from 0.009 68 mg x L(-1) to 9.68 mg x L(-1) (r = 0.998 1) for calcium, the detection limits (S/N = 3) and the quantitation limits (S/N = 10) of calcium were shown to be 0.002 1 mg x L(-1) and 0.007 1 mg x L(-1), respectively. The average recovery for calcium was 100.4%. The linear response covered the range from 0.01 mg x L(-1) to 10 mg x L(-1) (r = 0.995 9) for magnesium. The detection limits (S/N = 3) and the quantitation limits (S/N = 10) of magnesium showed to be 0.002 8 mg x L(-1) and 0.008 9 mg x L(-1), respectively. The average recovery for magnesium was 96.4%.

CONCLUSIONThe method is simple, rapid, cost-effective and precise with satisfactory results. The influence of Ephedra and Semen Armeniacae Amarum on the contents of gypsum dissolution are significant, while that of Radix Glycyrrhizae on the contents of gypsum dissolution is insignificant. The influence of Ephedra on the contents of magnesium dissolution are significant, while that of Semen Armeniacae Amarum and Radix Glycyrrhizae on the contents of magnesium dissolution are insignificant.

Calcium ; analysis ; Calcium Sulfate ; chemistry ; Drugs, Chinese Herbal ; analysis ; Electrophoresis, Capillary ; methods ; Magnesium ; analysis

This study was aimed to create strontium-calcium sulfate compounds for making a new bioactive material with osteoconductive and osteoinduceable activity for bone repairing. Its mechanics and degradation features were assessed in vitro. Powders of alpha-calcium sulfate hemihydrate (alpha-CSH) and SrCl2 were mixed completely to make Sr-calcium sulfate compounds materials with 6 different concentrations (0%, 0.1%, 0.3%, 0.5%, 1% and 2%) of Sr. Scanning electron microscope was used to observe the configuration of the new materials. The compressive strength of each material was tested. The materials were soaked into simulated body fluid (SBF) to test the features of degradation, which included pH, weight loss, declination of compressive strength and the changes of strontium ion concentration. The crystal appearances were influenced by incorporating of strontium. The compressive strength of non-strontium incorporating calcium sulfate was 36.65 +/- 2.22 MPa. When the concentration of strontium was increasing, the compressive strength measurements of the materials tended to decline. The compressive strength declined to 20.56 +/- 2.64 MPa when the strontium concentration reached to 2%. The pH value of the SBF declined when the time of degradation increased, but both of them were very stable. All of the materials got weight loss after being soaked in SBF for several weeks. The weight loss was slight within 4 weeks and it became dramatic after 4 weeks. When the concentration of strontium was increasing, the weight loss became more rapid and significant (P<0.05). During 0-4 weeks' degradation in SBF, the materials' compressive strength decreased much slower when the strontium concentration was below 0.5%; however, when the decrement of strength became faster, the strontium concentration became higher. The concentration of strontium ion in SBF began to increase faster after 4 weeks' soaking in SBF. As the concentration of strontium was increasing, the strontium ion concentration in SBF became higher (P = 0.000). The new compound materials made by the mixing of alpha-calcium sulfate hemihydrate and SrCl2 can provide efficient compressive strength. The features of degradation of the materials are very stable. The new materials can release lots of bone inducible substance-strontium ions to repair bone defection after 4 weeks of degradation.
Bone Substitutes ; chemical synthesis ; chemistry ; Calcium Sulfate ; chemistry ; Compressive Strength ; Humans ; Osteogenesis ; Strontium ; chemistry

OBJECTIVETo probe into the objectivity and authenticity of four properties beteen Mahuang decoction and Maxing Shigan decoction from biothermodynamics.

METHODThe power-time curves of growth of Staphylococcus aureus at different concentrations between Mahuang decoction and Maxing Shigan decoction were determined by TAM Air Isothermal Calorimeter. The growth rate constants of promotive and inhibitory actions were calculated. Moreover, the difference of properties beteen Mahuang decoction and Maxing Shigan decoction was analyzed from the point of view of TCM theory.

RESULTBoth the Mahuang decoction and Maxing Shigan decoction could inhibit the growth and metabolism of Staphylococcus aureus. The k and Pm were decreased with the mass increase of the decoction. However, inhibitory activity of Mahuang decoction with warm property was weaker than that of Maxing Shigan decoction with cool property. Moreover, Mahuang decoction decreased heat output in growth metabolism more weakly than Maxing Shigan decoction. There was a stable difference between them.

CONCLUSIONStudying on biothermodynamics can show the difference of four properties of Traditional Chinese Medicine. So, it provides a new and useful means for the study of the properties of traditional Chinese medicine.

Calcium Sulfate ; chemistry ; Calorimetry ; Cinnamomum ; chemistry ; Drug Combinations ; Drugs, Chinese Herbal ; chemistry ; isolation & purification ; pharmacology ; Ephedra sinica ; chemistry ; Glycyrrhiza uralensis ; chemistry ; Materia Medica ; chemistry ; isolation & purification ; pharmacology ; Medicine, Chinese Traditional ; Plants, Medicinal ; chemistry ; Prunus ; chemistry ; Staphylococcus aureus ; drug effects ; growth & development ; metabolism ; Thermodynamics