positive * Contradictory evidence exists (open all evidence to view)
All of the evidence provided on Hippocampome.org are quotes from scientific texts.
However, because quoted passages may be difficult to understand in isolation, contextual information and expanded abbreviations set in square brackets have been added for clarity.
"Somata of parvalbumin immunoperoxidase-labelled cells were located primarily in the SP [CA1 stratum pyramidale] (56.1%) and the SO [CA1 stratum oriens] (34.7%), with only very few cells in the SR [CA1 stratum radiatum] (1.9%) and in the alveus (7.3%, Figs. 1A, 2A). No PV-immunopositive cells were found in the SLM [stratum lacunosum-moleculare]."
Interpretation notes: Glutamatergic and GABAergic types in CA1 SLM are negative for PV
"Parvalbumin-immunoreactive neurons were seen in strata oriens and pyramidale, but not in strata radiatum and lacunosum-moleculare of the CA1 and CA3, while parvalbumin-immunoreactive fibers were found in all strata, but more concentrated in the stratum pyramidale."
Interpretation notes: Glutamatergic and GABAergic types in CA1 SLM_SR are negative for PV
"In the case of parvalbumin-VIP [vasoactive intestinal polypeptide] co-localization, only those VIP cells within or close to stratum pyramidale were examined, since parvalbumin cells are absent in other layers. Thus, all VIP-positive cells in the distal part of stratum radiatum or in stratum lacunosum-moleculare are considered parvalbumin-negative by their position. None of the 136 VIP-immunopositive cells near stratum pyramidale in CA1 and the 36 in CA3 showed parvalbumin immunofluorescence (Fig. 8E, F). In addition, 15 large multipolar VIPpositive basket cells were selected from different sections, but those were also negative for parvalbumin. This finding demonstrates that there is a basket cell type different from those containing parvalbumin but which is characterized by the coexistence of VIP and CCK [cholecystokinin]."
Interpretation notes: Glutamatergic and GABAergic types in CA1 SLM_SR are negative for PV
"Stratum radiatum contains no PV[parvalbumin]-positive cells; thus, CCK[cholecystokinin]-immunoreactive basket cells are PV negative
(Gulyas et al., 1991b). Direct evidence for two neurochemically
distinct types of basket cells has recently been provided (Acsady
et al., 1996a,b; see Section IV.3.d)."
Interpretation notes: Glutamatergic and GABAergic types in CA1 SR are negative for PV
"In the hippocampus, CCK [cholecystokinin] immunoreactive (CCK-I) terminals were shown to form pericellular baskets around the pyramidal
cell somata and make synaptic contacts on them, and thus some of CCK immunoreactive neurons are considered to be basket cells in this region
[Harris 1985, Hendry 1985, Nunzi 1985]. However, so far our preliminary observations indicated that CCK and PV [parvalbumin] immunoreactivities are not present in the same neuron."
Interpretation notes: Glutamatergic and GABAergic CCK+ types in CA1 SLM_SR_SP_SO are probably PV-
"In the hippocampus, CCK [cholecystokinin] immunoreactive (CCK-I) terminals were shown to form pericellular baskets around the pyramidal
cell somata and make synaptic contacts on them, and thus some of CCK immunoreactive neurons are considered to be basket cells in this region
[Harris 1985, Hendry 1985, Nunzi 1985]. However, so far our preliminary observations indicated that CCK and PV [parvalbumin] immunoreactivities are not present in the same neuron."
Interpretation notes: Glutamatergic and GABAergic CCK+ types in CA1 SLM_SR_SP_SO are probably PV- by contrapositive logic
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