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December 2019

Int J Immunopharmacol. 1992 May; 14(4): 661-5.

Suppressive effect of acupuncture on delayed type hypersensitivity to trinitrochlorobenzene and involvement of opiate receptors.

Kasahara T, Wu Y, Sakurai Y, Oguchi K.

Department of Pharmacology, School of Medicine, Showa University, Tokyo, Japan.

We reported previously that electroacupuncture (Acu) at an acu-point equivalent to GV-4 in mice either enhanced or suppressed the delayed type hypersensitivity (DTH) to 2,4,6-trinitrochlorobenzene (TNCB, picryl chloride) depending on the time of treatment. We report here the suppression of the efferent phase of DTH to TNCB by Acu in mice. In 7- to 9-week-old male BALB/c, C57BL/6 and ddY mice, significant suppression of the DTH was observed when Acu had been applied once per day for three consecutive days before TNCB challenge. When Acu had been applied a single, significant suppression also occurred. Application to another point (at a middle area of the femoral muscle) failed to suppress the DTH to TNCB. This Acu-evoked DTH suppression was blocked dose-relatedly by pretreatment of systemic naloxone hydrochloride, indicating that opioid receptor-mediated mechanisms are involved in this immune response.

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