Inhibitory effect of different Dendrobium species on LPS-induced inflammation in macrophages via suppression of MAPK pathways / 中国天然药物

Dendrobii Caulis (DC), named 'Shihu' in Chinese, is a precious herb in traditional Chinese medicine. It is widely used to nourish stomach, enhance body fluid production, tonify "Yin" and reduce heat. More than thirty Dendrobium species are used as folk medicine. Some compounds from DC exhibit inhibitory effects on macrophage inflammation. In the present study, we compared the anti-inflammatory effects among eight Dendrobium species. The results provided evidences to support Dendrobium as folk medicine, which exerted its medicinal function partially by its inhibitory effects on inflammation. To investigate the anti-inflammatory effect of Dendrobium species, mouse macrophage cell line RAW264.7 was activated by lipopolysaccharide. The nitric oxide (NO) level was measured using Griess reagent while the pro-inflammatory cytokines were tested by ELISA. The protein expressions of inducible NO synthase (iNOS), cyclooxygenase-2 (COX-2) and mitogen-activated protein kinases (MAPKs) phosphorylation were evaluated by Western blotting analysis. Among the eight Dendrobium species, both water extracts of D. thyrsiflorum B.S.Williams (DTW) and D. chrysotoxum Lindl (DCHW) showed most significant inhibitory effects on NO production in a concentration-dependent manner. DTW also significantly reduced TNF-α, MCP-1, and IL-6 production. Further investigations showed that DTW suppressed iNOS and COX-2 expression as well as ERK and JNK phosphorylation, suggesting that the inhibitory effects of DTW on LPS-induced macrophage inflammation was through the suppression of MAPK pathways. In conclusion, D. thyrsiflorum B.S.Williams was demonstrated to have potential to be used as alternative or adjuvant therapy for inflammation.

Inhibitory effect of different Dendrobium species on LPS-induced inflammation in macrophages via suppression of MAPK pathways / 中国天然药物

Dendrobii Caulis (DC), named 'Shihu' in Chinese, is a precious herb in traditional Chinese medicine. It is widely used to nourish stomach, enhance body fluid production, tonify "Yin" and reduce heat. More than thirty Dendrobium species are used as folk medicine. Some compounds from DC exhibit inhibitory effects on macrophage inflammation. In the present study, we compared the anti-inflammatory effects among eight Dendrobium species. The results provided evidences to support Dendrobium as folk medicine, which exerted its medicinal function partially by its inhibitory effects on inflammation. To investigate the anti-inflammatory effect of Dendrobium species, mouse macrophage cell line RAW264.7 was activated by lipopolysaccharide. The nitric oxide (NO) level was measured using Griess reagent while the pro-inflammatory cytokines were tested by ELISA. The protein expressions of inducible NO synthase (iNOS), cyclooxygenase-2 (COX-2) and mitogen-activated protein kinases (MAPKs) phosphorylation were evaluated by Western blotting analysis. Among the eight Dendrobium species, both water extracts of D. thyrsiflorum B.S.Williams (DTW) and D. chrysotoxum Lindl (DCHW) showed most significant inhibitory effects on NO production in a concentration-dependent manner. DTW also significantly reduced TNF-α, MCP-1, and IL-6 production. Further investigations showed that DTW suppressed iNOS and COX-2 expression as well as ERK and JNK phosphorylation, suggesting that the inhibitory effects of DTW on LPS-induced macrophage inflammation was through the suppression of MAPK pathways. In conclusion, D. thyrsiflorum B.S.Williams was demonstrated to have potential to be used as alternative or adjuvant therapy for inflammation.

The treatment of dorsally displaced intra-articular fractures of the distal radius via palmar approach / 中华外科杂志

<p><b>OBJECTIVE</b>To treat dorsally displaced intra-articular fractures of the distal radius, and to assess the integrity of radiocarpal joint and the reliability of stable fixation fracture.</p><p><b>METHODS</b>Sixty-three cases (65 sides) patients with dorsally displaced intra-articular fractures of the distal radius were performed operatively with the open reduction and internal fixation via palmar approach between August 2003 and May 2008. The series included 20 males (21 sides) and 43 females (44 sides). The mean age of patients was 52.4 years ranging from 18 to 82 years. According to the Frykman classification, 6 sides were of type III, 8 of type IV, 5 of type V, 4 of type VI, 13 of type VII and 29 of type VIII. With the exception of the radiocarpal arthrography and the standard antero-posterior and lateral views of the wrist joint, two new tangential antero-posterior and lateral views of the wrist joint were intraoperatively described so as to observe the relation of the distal screws with the articular surface.</p><p><b>RESULTS</b>The 53 cases (54 sides) of the 63 cases (65 sides) were followed up, and the follow-up time was averagely 16.4 months ranging from 4 to 47 months. According to Gartland and Werley criteria, 32 sides were rated as excellent (59.3%), 14 sides as good (25.9%), 7 fair (13.0%) and 1 poor (1.8%), and the excellent-good rate was 85.2%. Observing the new tangential antero-posterior and lateral views of the wrist joint, it showed that screws appeared penetrating into the radiocarpal joint in 26 of the 42 sides by standard antero-posterior view and in 31 of the 42 sides by standard lateral view.</p><p><b>CONCLUSION</b>This palmar approach represents a simple and valuable treatment methodology for the most frequent types of unstable fractures of the distal radius in young and elderly patients.</p>