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Detection of nerve growth factor mRNA in rodent salivary glands with digoxigenin- and 33P-labeled oligonucleotides: effects of castration and sympathectomy

C Humpel, E Lindqvist and L Olson

Department of Histology & Neurobiology, Karolinska Institute, Stockholm, Sweden.

Nerve growth factor (NGF) is a protein highly expressed in the male mouse submandibular gland. We have applied a non-radioactive in situ hybridization method using digoxigenin-labeled NGF oligonucleotides, and have found the highest amounts of NGF mRNA in the secretory striated ducts of the male mouse submandibular gland. Scattered strongly positive cells were found in male mouse sublingual glands. Weakly labeled cells were seen in female mouse and in male rat submandibular gland striated duct cells. Using 33P as an alternative to 32P and 35S, we demonstrated a 1.3 KB NGF mRNA in salivary glands of male mice by Northern blot hybridization. Using 33P we detected NGF mRNA in male mouse submandibular glands by in situ hybridization but with a signal that, compared with the non-radioactive method, had a very low resolution. Castration of male mice almost abolished both the 1.3 KB NGF mRNA seen with Northern blots and the NGF mRNA labeling in submandibular glands 4 weeks after the operation, whereas levels were increased 6 hr and 2 days after sympathectomy. We conclude that hybridization with digoxigenin-labeled NGF oligonucleotides is a good tool to study the expression and regulation of NGF mRNA in male mouse submandibular glands.

Volume 41, Issue 5, pp. 703-708, 05/01/1993
Copyright © 1993 by The Histochemical Society


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H. Matsuda, H. Koyama, H. Sato, J. Sawada, A. Itakura, A. Tanaka, M. Matsumoto, K. Konno, H. Ushio, and K. Matsuda
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