Contemp Oncol (Pozn). 2016; 20(2): 119–123.
Published online 2016 Jun 14. doi: 10.5114/wo.2016.60065
PMCID: PMC4925730
Department of Clinical Oncology, University Hospital in Krakow, Krakow, Poland
Corresponding author.
Address for correspondence: Mirosława Puskulluoglu, Department of Clinical Oncology, University Hospital in Krakow, Śniadeckich 10, 31-501 Krakow, Poland. e-mail: lp.pw@llocrim
Abstract
Abstract
Acupuncture
is a complementary and alternative medical treatment (CAM) which is
increasingly used in the care of cancer patients. Traditionally derived
from Chinese medicine, nowadays it is becoming a part of evidence-based
oncology. The use of acupuncture in these patients has been recommended
by the American Cancer Society (ACS) for the treatment of side effects
associated with conventional cancer therapy and cancer-related ailments.
A growing body of evidence supports the use of acupuncture in the
treatment of cancer-induced pain and chemotherapy-related nausea and
vomiting. Also other indications, such as xerostomia, fatigue, hot
flashes, anxiety and peripheral neuropathy, are being constantly
evaluated. This article summarizes the most important discoveries
related to the possible usefulness of this method in contemporary
oncology. Emphasis is placed on the results of randomized controlled
trials with an adequate level of evidence. However, explanation of the
mechanisms responsible for these effects requires confirmation in
further studies with an adequate level of evidence. In future,
acupuncture may become an interesting and valuable addition to
conventional medicine.
Keywords: acupuncture, cancer, complementary and alternative treatment, side effects, supportive treatment
Introduction
Complementary and alternative medical treatment (CAM) has gained significant interest in recent years [1].
Although the list of CAM has changed over the years, the Office of
Alternative Medicine (established at the National Institutes of Health
[NIH] in the USA) nowadays recognizes five major categories [2].
Acupuncture, belonging to the Manipulative Therapies category, due to
its low cost, safety (considering all possible contraindications) and
the minimal number of side effects is gaining popularity among patients [3].
Acupuncture has repeatedly been reported to be useful in oncological
practice in alleviating side effects of anti-tumor treatment. Numerous
clinical trials of acupuncture indicate its potential role in fighting
the following ailments: nausea and chemotherapy-induced vomiting, pain,
xerostomia, vasomotor symptoms, neutropenia, fatigue, anxiety, insomnia,
lymphoedema after mastectomy, and peripheral neuropathy [4–16].
A sudden increase in the number of studies on acupuncture in oncology
was first noted in 1997, when at the NIH conference a consensus was
reached on the use of acupuncture, which was then acknowledged as a
useful medical procedure [17]. This article reviews the literature concerning the referred studies.
What is acupuncture?
Acupuncture
is a method of treatment that has its origins in Traditional Chinese
Medicine and is based on over 4,000 years of empirical evidence. The
technique involves the insertion of thin needles into specific locations
(energy points) on the patient's body along energy pathways or
meridians. According to Chinese philosophy, the hypothetical substance
Qi (vital energy) flows in the human body along the meridians, and
blockage of Qi leads to a particular ailment [18].
There are 12 main and 8 extra meridians. All the main meridians consist
of internal channels connected with the 12 body organs and the external
channels spreading symmetrically on the skin surface. The literature
describes around 360 energy points located on the external parts of the
meridians. Acupuncture is considered to cure diseases by stimulating
particular acupoints and removing blockage of Qi [19]. Figures 1–3 present acupuncture meridian pathways.
Although
acupuncture has been studied extensively in both animal and human
models, little is known about its mechanisms that could explain
acupuncture's therapeutic qualities. Table 1
shows suggested mechanisms of acupuncture. This treatment method has
been the focus of increased interest, which has resulted in a growing
number of studies.
Acupuncture as supportive treatment
Chemotherapy
agents are considered to be medications with the most severe side
effects, which in many cases may force the patient to abandon therapy.
Because of that, proper alleviation of side effects is most crucial.
Acupuncture should not be seen as a replacement for modern medicines,
but rather an adjunct with a low level of procedure-related
complications that may enhance efficacy and in some cases allow the
dosage of other drugs to be reduced. Acupuncture as part of supportive
treatment in oncology has been tested for numerous indications. The
strongest evidence from a randomized controlled trial (RCT) with low
risk of bias supports the use of acupuncture for control of nausea and
vomiting related to chemotherapy [25].
This indication seems to be very important, as the high emetogenicity
of many cytostatic agents is hard to control even with three-drug
therapy [26].
Despite many RCTs on treatment of other chemotherapy-induced side
effects, the level of evidence is not yet satisfactory, but considering
its relative safety, acupuncture may be useful in everyday practice.
Descriptions of these clinical trials on the effectiveness of
acupuncture in minimizing cancer treatment-related side effects are
summarized in Table 2.
Level of evidence issue
A
recently published systemic review stated that other indications, such
as pain, xerostomia, vasomotor symptoms, fatigue, mood disorders, and
insomnia, were not evaluated in RCTs with an appropriate level of
evidence [44].
One of the major problems with the reviewed studies is their poor
methodological quality, mostly difficulty with blinding and a low number
of subjects. Also the optimal design of such studies (acupuncture vs
placebo, acupuncture vs sham acupuncture) has not been established yet [45]. In spite of satisfactory results in most of these studies, further research on a larger group of patients is necessary.
Summary
In
an oncological setting, acupuncture is still being constantly reviewed.
Nevertheless, the present available evidence suggests that acupuncture
may become a safe, low-cost and efficient form of complementary therapy
in modern oncology. The potential role of acupuncture has been found in
alleviation of various symptoms, but the data from the majority of
clinical studies on acupuncture are heterogeneous. The incomplete
description of procedural methodology and insufficient patient groups
limit their value. Thus, further research on a larger scale on the
potential use of acupuncture in contemporary oncology is required. It
should be emphasized that alternative medicine may become the source of a
number of interesting concepts worth examining and testing in research
and clinical settings.
The authors declare no conflict of interest.
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