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Acupuncture (PDQ®)

Health Professional Version
Last Modified: 03/16/2012

Laboratory/Animal/Preclinical Studies

At least seven animal studies investigating the effects of acupuncture in cancer or cancer-related conditions have been reported in the scientific literature.[1-5] Two of the studies were conducted in China, one of which was published in Chinese with an English abstract. One study was conducted in Japan, one in Sweden, and one in the United States. Four of the studies were ex vivo laboratory investigations using blood samples or tissues; [1-3,5] the remaining study was an animal behavioral study testing the effect of acupuncture on chemotherapy -induced nausea and vomiting. [4]

The four ex vivo studies suggested that acupuncture is useful in anticancer therapy either by actively stimulating immune activity or by preventing chemotherapy suppression of immune activity.

In a study involving normal rats, electroacupuncture (EA) (1 Hz, 5–20 V, 1-millisecond pulse width, 2 hours) applied at the point Tsu-Sanli (S36) for 2 hours daily on 3 consecutive days enhanced the cytotoxicity of splenic natural killer (NK) cells compared with a stimulation of a nonacupuncture control point in the abdominal muscle.[3]

Another study found that NK cell activity and T-lymphocyte transformation rate were increased in a mouse model of transplanted mammary cancer compared with a control (P < .05) after eight sessions of acupuncture and moxibustion.[2]

A study involving tumor -bearing mice (sarcoma S180) using moxibustion to warm the acupuncture point Guanyuan (CV4) once a day for 10 days found significantly increased production of erythrocytes, compared with a nontreatment control.[1]

The fourth ex vivo study used a rat model to investigate the effect of EA on nerve growth factor (NGF), which is associated with polycystic ovary syndrome (PCOS). Women with PCOS have an increased risk of endometrial cancer and other diseases. Repeated EA treatments (12 treatments administered over 30 days) in PCO rats significantly lowered the concentrations of NGF in the ovaries, compared with untreated PCO rats.[5]

A study of cyclophosphamide -induced emesis in a ferret behavioral model used acupuncture as an adjunct therapy in treating the emetic side effects of chemotherapy. EA at 100 Hz, 1.5 V, for 10 minutes in combination with subeffective doses of antiemetics such as ondansetron (0.04 mg/kg), droperidol (0.25 mg/kg), and metoclopramide (2.24 mg/kg) significantly reduced the total number of emetic episodes by 52%, 36%, and 73%, respectively (P < .01), in this ferret model.[4]

A rat model has been established by injecting AT-3.1 prostate cancer cells into the tibia of the adult male Copenhagen rat, which closely mimics prostate cancer-induced bone cancer pain.[6] The cancer-caused pain was treated with 10 Hz EA for 30 minutes a day at acupuncture point gallbladder 30 (GB30) from days 14 to 18 after cancer-cell injection. For sham control, EA needles were inserted into GB30 without stimulation. Thermal hyperalgesia, a decrease in paw withdrawal latency to a noxious thermal stimulus, and mechanical hyperalgesia, a decrease in paw withdrawal pressure threshold, were measured at baseline and 20 minutes after EA. EA significantly attenuated the hyperalgesia compared with sham control. Moreover, the EA inhibited up-regulation of preprodynorphin mRNA and dynorphin as well as interleukin-1beta (IL-1beta) and its mRNA compared with sham control. Intrathecal injection of antiserum against dynorphin A (1–17) and IL-1 receptor antagonist significantly inhibited the cancer-induced hyperalgesia. These data suggests that EA alleviates bone cancer pain at least in part by suppressing spinal dynorphin and IL-1beta expression.[7,8]

Another cutaneous cancer pain model has been established by injecting B16-BL6 melanoma cells into the plantar region of one hind paw of C57BL/6 mice. A single EA treatment showed significant analgesia on day 8 but not on day 20. EA treatments once every other day starting on day 8 showed analgesia at day 20, but EA starting on day 16 did not. The results indicate that EA exerts antihyperalgesic effects on early stage but not on late stage cutaneous cancer pain.[9] These animal studies support the clinical use of EA in the treatment of cancer pain.

The findings of these studies suggest that acupuncture may be effective in treating cancer-related symptoms and cancer treatment–related disorders and that acupuncture may be able to activate immune functions [1-3] and regulate the autonomic nervous system.[4,5] Only one study reported a decrease in tumor volume in animals treated with acupuncture compared with control animals; however, the scientific value of this report is limited because of insufficient information about the research methodology.[2]

References

  1. Wu P, Cao Y, Wu J: Effects of moxa-cone moxibustion at Guanyuan on erythrocytic immunity and its regulative function in tumor-bearing mice. J Tradit Chin Med 21 (1): 68-71, 2001.  [PUBMED Abstract]

  2. Liu LJ, Guo CJ, Jiao XM: [Effect of acupuncture on immunologic function and histopathology of transplanted mammary cancer in mice] Zhongguo Zhong Xi Yi Jie He Za Zhi 15 (10): 615-7, 1995.  [PUBMED Abstract]

  3. Sato T, Yu Y, Guo SY, et al.: Acupuncture stimulation enhances splenic natural killer cell cytotoxicity in rats. Jpn J Physiol 46 (2): 131-6, 1996.  [PUBMED Abstract]

  4. Lao L, Zhang G, Wong RH, et al.: The effect of electroacupuncture as an adjunct on cyclophosphamide-induced emesis in ferrets. Pharmacol Biochem Behav 74 (3): 691-9, 2003.  [PUBMED Abstract]

  5. Stener-Victorin E, Lundeberg T, Waldenström U, et al.: Effects of electro-acupuncture on nerve growth factor and ovarian morphology in rats with experimentally induced polycystic ovaries. Biol Reprod 63 (5): 1497-503, 2000.  [PUBMED Abstract]

  6. Zhang RX, Liu B, Wang L, et al.: Spinal glial activation in a new rat model of bone cancer pain produced by prostate cancer cell inoculation of the tibia. Pain 118 (1-2): 125-36, 2005.  [PUBMED Abstract]

  7. Zhang RX, Li A, Liu B, et al.: Electroacupuncture attenuates bone cancer pain and inhibits spinal interleukin-1 beta expression in a rat model. Anesth Analg 105 (5): 1482-8, table of contents, 2007.  [PUBMED Abstract]

  8. Zhang RX, Li A, Liu B, et al.: Electroacupuncture attenuates bone-cancer-induced hyperalgesia and inhibits spinal preprodynorphin expression in a rat model. Eur J Pain 12 (7): 870-8, 2008.  [PUBMED Abstract]

  9. Mao-Ying QL, Cui KM, Liu Q, et al.: Stage-dependent analgesia of electro-acupuncture in a mouse model of cutaneous cancer pain. Eur J Pain 10 (8): 689-94, 2006.  [PUBMED Abstract]





Glossary Terms

abdominal (ab-DAH-mih-nul)
Having to do with the abdomen, which is the part of the body between the chest and the hips that contains the pancreas, stomach, intestines, liver, gallbladder, and other organs.
activate (AK-tih-vayt)
In biology, to stimulate a cell in a resting state to become active. This causes biochemical and functional changes in the activated cell.
acupuncture (AK-yoo-PUNK-cher)
The technique of inserting thin needles through the skin at specific points on the body to control pain and other symptoms. It is a type of complementary and alternative medicine.
acupuncture point (AK-yoo-PUNK-cher poynt)
A specific spot on the body where an acupuncture needle may be inserted to control pain and other symptoms. Also called acupoint.
adjunct therapy (A-junkt THAYR-uh-pee)
Another treatment used together with the primary treatment. Its purpose is to assist the primary treatment. Also called adjunctive therapy.
animal study (A-nih-mul STUH-dee)
A laboratory experiment using animals to study the development and progression of diseases. Animal studies also test how safe and effective new treatments are before they are tested in people.
antiemetic (AN-tee-eh-MEH-tik)
A drug that prevents or reduces nausea and vomiting.
autonomic nervous system (AW-toh-NAH-mik NER-vus SIS-tem)
The part of the nervous system that controls muscles of internal organs (such as the heart, blood vessels, lungs, stomach, and intestines) and glands (such as salivary glands and sweat glands). One part of the autonomic nervous system helps the body rest, relax, and digest food and another part helps a person fight or take flight in an emergency. Also called ANS and involuntary nervous system.
blood (blud)
A tissue with red blood cells, white blood cells, platelets, and other substances suspended in fluid called plasma. Blood takes oxygen and nutrients to the tissues, and carries away wastes.
cancer (KAN-ser)
A term for diseases in which abnormal cells divide without control and can invade nearby tissues. Cancer cells can also spread to other parts of the body through the blood and lymph systems. There are several main types of cancer. Carcinoma is a cancer that begins in the skin or in tissues that line or cover internal organs. Sarcoma is a cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue. Leukemia is a cancer that starts in blood-forming tissue such as the bone marrow, and causes large numbers of abnormal blood cells to be produced and enter the blood. Lymphoma and multiple myeloma are cancers that begin in the cells of the immune system. Central nervous system cancers are cancers that begin in the tissues of the brain and spinal cord. Also called malignancy.
cell (sel)
The individual unit that makes up the tissues of the body. All living things are made up of one or more cells.
chemotherapy (KEE-moh-THAYR-uh-pee)
Treatment with drugs that kill cancer cells.
control animal (kun-TROLE A-nih-mul)
An animal in a study that does not receive the treatment being tested. Comparing the health of control animals with the health of treated animals allows researchers to evaluate the effects of a treatment more accurately.
cyclophosphamide (SY-kloh-FOS-fuh-mide)
A drug that is used to treat many types of cancer and is being studied in the treatment of other types of cancer. It is also used to treat some types of kidney disease in children. Cyclophosphamide attaches to DNA in cells and may kill cancer cells. It is a type of alkylating agent. Also called CTX and Cytoxan.
cytotoxic (SY-toh-TOK-sik)
Cell-killing.
dose (dose)
The amount of medicine taken, or radiation given, at one time.
droperidol (droh-PAYR-ih-dol)
A drug used to prevent nausea and vomiting in patients who receive anesthesia before surgery. It is also used to treat anxiety. Droperidol is a type of antiemetic, adjunct anesthesia, and antipsychotic.
electroacupuncture (ee-LEK-troh-AK-yoo-PUNK-cher)
A procedure in which pulses of weak electrical current are sent through acupuncture needles into acupuncture points in the skin. This procedure is being studied in the prevention of nausea and vomiting in patients undergoing chemotherapy.
emesis (EH-meh-sis)
Vomiting.
emetic (eh-MEH-tik)
Describes a substance that causes vomiting. Also called emetogenic.
endometrial cancer (EN-doh-MEE-tree-ul KAN-ser)
Cancer that forms in the tissue lining the uterus (the small, hollow, pear-shaped organ in a woman's pelvis in which a fetus develops). Most endometrial cancers are adenocarcinomas (cancers that begin in cells that make and release mucus and other fluids).
erythrocyte (eh-RITH-roh-site)
A cell that carries oxygen to all parts of the body. Also called RBC and red blood cell.
ex vivo (ex VEE-voh)
Outside of the living body. Refers to a medical procedure in which an organ, cells, or tissue are taken from a living body for a treatment or procedure, and then returned to the living body.
immune function (ih-MYOON FUNK-shun)
Production and action of cells that fight disease or infection.
immune response (ih-MYOON reh-SPONTS)
The activity of the immune system against foreign substances (antigens).
lymphocyte (LIM-foh-site)
A type of immune cell that is made in the bone marrow and is found in the blood and in lymph tissue. The two main types of lymphocytes are B lymphocytes and T lymphocytes. B lymphocytes make antibodies, and T lymphocytes help kill tumor cells and help control immune responses. A lymphocyte is a type of white blood cell.
mammary (MA-muh-ree)
Having to do with the breast.
metoclopramide (meh-toh-KLOH-pruh-mide)
A drug that increases the motility (movements and contractions) of the stomach and upper intestine. It is used to treat certain stomach problems and nausea and vomiting caused by chemotherapy. It is a type of antiemetic and a type of motility agent. Also called Reglan.
moxibustion (MOK-sih-BUS-chun)
In traditional Chinese medicine, a type of heat therapy in which an herb is burned on or above the skin to warm and stimulate an acupuncture point or affected area.
natural killer cell (NA-chuh-rul KIH-ler sel)
A type of immune cell that has granules (small particles) with enzymes that can kill tumor cells or cells infected with a virus. A natural killer cell is a type of white blood cell. Also called NK cell and NK-LGL.
nausea (NAW-zee-uh)
A feeling of sickness or discomfort in the stomach that may come with an urge to vomit. Nausea is a side effect of some types of cancer therapy.
nerve growth factor (nerv grothe FAK-ter)
A protein made by the body that causes certain nerve cells to grow and helps keep them alive.
ondansetron (on-DAN-seh-tron)
The active ingredient in a drug used to treat nausea and vomiting caused by cancer treatment. Ondansetron is a type of serotonin receptor antagonist and a type of antiemetic.
polycystic ovary syndrome (PAH-lee-SIS-tik OH-vuh-ree SIN-drome)
A condition marked by infertility, enlarged ovaries, menstrual problems, high levels of male hormones, excess hair on the face and body, acne, and obesity. Women with polycystic ovary syndrome have an increased risk of diabetes, high blood pressure, heart disease, and endometrial cancer. Also called PCOS.
sarcoma (sar-KOH-muh)
A cancer of the bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue.
side effect (side eh-FEKT)
A problem that occurs when treatment affects healthy tissues or organs. Some common side effects of cancer treatment are fatigue, pain, nausea, vomiting, decreased blood cell counts, hair loss, and mouth sores.
splenic (SPLEH-nik)
Having to do with the spleen (an organ in the abdomen that makes immune cells, filters the blood, stores blood cells, and destroys old blood cells).
symptom (SIMP-tum)
An indication that a person has a condition or disease. Some examples of symptoms are headache, fever, fatigue, nausea, vomiting, and pain.
therapy (THAYR-uh-pee)
Treatment.
tissue (TIH-shoo)
A group or layer of cells that work together to perform a specific function.
transformation (TRANZ-for-MAY-shun)
In medicine, the change that a normal cell undergoes as it becomes malignant.
transplantation (tranz-plan-TAY-shun)
A surgical procedure in which tissue or an organ is transferred from one area of a person’s body to another area, or from one person (the donor) to another person (the recipient).
tumor (TOO-mer)
An abnormal mass of tissue that results when cells divide more than they should or do not die when they should. Tumors may be benign (not cancer), or malignant (cancer). Also called neoplasm.
tumor volume (TOO-mer VOL-yoom)
The size of a cancer measured by the amount of space taken up by the tumor. For example, the tumor volume of prostate cancer is the percentage of the prostate taken up by the tumor.
vomit (VAH-mit)
To eject some or all of the contents of the stomach through the mouth.