Expression of amygdala-enriched genes in different amygdaloid
subnuclei. (A) Probe 75 (unconventional type myosin,
TIGR identifier TC37197). Note the sharp discontinuity in expression
levels between the lateral (arrow), and basolateral (arrowhead) nuclei.
Staining was also observed in cortical layers 2/3 (white arrow).
No staining was detected in the cerebellum, olfactory bulb, or PAG (not
shown). (B) Probe 45–6 (Lhx6, GenBank accession no.
AB031040). Lhx 6 hybridized to many scattered cells in the forebrain
and was particularly concentrated in the dorsal aspect of the medial
amygdala (arrow); the cerebellum was unlabeled (not shown). Lhx 6 was
not represented on the microarray, but was analyzed because of its
coexpression with Lhx7 (28, 29), which also was enriched in the
amygdala (not shown). (C) Probe 50 (neuronal pentraxin
receptor, TIGR identifier TC18750). The expression domain matches the
boundaries of the lateral and basolateral amygdala (arrow). Staining
also was observed throughout cortex (arrowhead) and in hippocampus (not
shown). No signal was detected in the cerebellum or PAG. The olfactory
bulb had weak staining (not shown). (D) Probe 28 (plasma
glutathione peroxidase, TIGR identifier TC31122). Intense labeling is
apparent in the medial amygdala (arrow), hypothalamus, and PAG (not
shown). Note also signal in a contiguous subregion of the basomedial
amygdala (dotted line). Two other genes also showed expression in this
same region (not shown). (E) Probe 68 [cerebrospinal
fluid (CSF)-induced cysteine protease, TIGR identifier TC30215].
Hybridization in the basomedial amygdala (arrow) was detectable.
Staining also was observed in the hippocampus but was absent in the
remaining regions of study (not shown). (F) Probe 20
(Ccte chaperonin ɛ subunit, TIGR identifier TC30886). Signal was
detected in the medial amygdala (arrow) and in the lateral,
basolateral, and basomedial complexes (not shown). No staining was
detected in the other four regions of study (not shown). Probe numbers
are in parentheses.