Study on dynamic effect of acupuncture on marrow cell cycle regulatory protein cyclin D1 expression and cell cycle in mice with cyclophosphamide induced myelosuppression / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To explore the molecular biological mechanism of acupuncture and moxibustion (A&M) in reducing chemotherapy-related toxicity, relieving myelosuppression and increasing peripheral white blood cells (WBC).</p><p><b>METHODS</b>Two hundred and twenty-four male Kunming mice of clean grade were randomized equally into 4 groups, the blank control group (A), the model group (B), the acupuncture group (C), and the moxibustion group (D). Except those in Group A, mice were duplicated into myelosuppression model with cyclophosphamide (CTX) using the accepted method. After being modeled, mice in Group C and D were treated with acupuncture and moxibustion respectively, once a day for 7 successive days, while those in Group A and B were dealt with the same actions (seizing and fixing) every day but no therapy was given. From day 2 to day 7 of the treatment, 8 mice were taken from every group per day and killed in batches. Their peripheral WBC was counted and bone marrow for detecting Cyclin D1 expression and percentages of bone marrow cells in different cycle stages using immunohistochemistry and flow cytometer respectively.</p><p><b>RESULTS</b>WBC count restored to exceed the baseline in group C and D at day 5 of the treatment, being one day earlier than that in group B. Cyclin D1 expression in the bone marrow raised in Group C and D, and reached the peak at day 4, showing significant difference as compared with that in Group B (P < 0.01). The phase G1 marrow cell percentages in Group C and D was lower than that in Group B at all days of detection, showing statistical significance at day 2-4 (P < 0.05 or P < 0.01); while the percentages of phase S and G2-M cells in the two treated groups was higher than that in group B all the times.</p><p><b>CONCLUSIONS</b>While CTX damaged marrow cells, it intervened the cell cycle regularity and reduced the DNA content to cause myelosuppression and leucocytopenia. A&M therapy could improve the Cyclin D1 expression, speed up the cell transition from phase G1 to phase S and increase the synthesis of DNA. At the mean time, taking advantage of the block at phase G2, it can repair the injured DNA, speed up cell mitosis for turning into multiplication, improve the anti-injury and repairing ability of cells to protect bone marrow cells, and relieve the myelosuppression.</p>

Effects of acupuncture and moxibustion on DNA excision repair-related proteins of bone marrow cell in cyclophosphamide-induced mice / 中国针灸

<p><b>OBJECTIVE</b>To explore the molecular biological mechanism of acupuncture and moxibustion for relieving myelosuppression and increasing white blood cells.</p><p><b>METHODS</b>Two hundred and twenty-four clean male Kunming mice were randomly divided into a control group, a model group, an acupuncture group and a moxibustion group, 56 mice in each group. The model of myelosuppression was made with Cyclophosphamide. In the acupuncture group and the moxibustion group, acupoints "Dazhui" (GV 14), "Geshu" (BL 17), "Shenshu" (BL 23) and "Zusanli" (ST 36) were used for treatment with acupuncture and moxibustion, respectively, while, in the control group and the model group, there were no treatment carried out except catching and fixing. The changes of bone marrow cell DNA pol beta and XPD between the 2nd and 7th day were examined with immunohistochemical method.</p><p><b>RESULTS</b>Acupuncture and moxibustion markedly up-regulated the expression of bone marrow cell DNA pol beta and XPD, and promoted the base excision repair and nucleotide excision repair, which leads to the relieving Cyclophosphamide-induced myelosuppression and increasing the number of white blood cells.</p><p><b>CONCLUSION</b>For acupuncture and moxibustion, one of the bone major mechanisms in relieving post-chemotherapy myelosuppression, protecting hemopoietic function and increasing the white blood cells is that it can promote the repair of the bone marrow cell DNA excision and protect hemopoietic cells from injury by chemical drugs.</p>

The original meaning of concept of Shichen in acupoint selection according to time / 中国针灸

<p><b>OBJECTIVE</b>To explore the original meaning of concept of shichen in acupoint selection according to time of "needling methods of midnight-noon ebb-flow (Ziwu Liuzhu)" and "eight methods of the intelligent turtle (Linggui Bafa)", so as to provide more scientific and accurate calculating method for acupoint selection according to time in clinical acupuncture and moxibustion.</p><p><b>METHODS</b>Based on the theory of "Heaven-people corresponding", use modern calculating time method to return to the ancient traditional concept of shichen. Compared ancient and modern calculating time methods of shichen and referred to sundial time-calculating method, in combination with changes of day and night time in 24 solar terms, use modern time-calculating method to calculate, so as to deny the mechanical time-calculating method of heavenly stems and earthly branches, in which each shichen is equal to 2 hours and it has been used from the last stage of the Ming dynasty and the initial stage of the Qing dynasty up to now.</p><p><b>RESULTS</b>Return to the original meaning of shichen in acupoint selection according to time, and time of each shichen should change along with changes of day and night time in the four seasons of one year.</p><p><b>CONCLUSION</b>The concrete calculating method of shichen for different stages of four seasons in one year should be different.</p>