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Results: 6

1.
Figure 6

Figure 6. dSK expression in larval and adult brains.. From: Roles of the Drosophila SK Channel (dSK) in Courtship Memory.

(A) A single confocal section through a WT larval brain stained with dSK antibody (green) and pre-synaptic marker nc82 (blue). dSK is highly expressed in PNs connecting ALs and MB calyx. (B) A confocal section through a GH146-GAL4/+;UAS-mCD8GFP/+ stained with anti-dSK antibody (red). Notice dSK expression in PNs both in ALs and MB calyx.

Ahmad N. Abou Tayoun, et al. PLoS One. 2012;7(4):e34665.
2.
Figure 4

Figure 4. Effects of dSK inactivation on 24 h courtship memory formation.. From: Roles of the Drosophila SK Channel (dSK) in Courtship Memory.

Courtship indices of naïve and trained males for each group were measured during testing with mated females 24 h after LTM training. Note that only flies expressing dSKDN in 201y-positive neurons do not show training-induced courtship suppression and therefore are severely impaired in 24 h courtship memory. Mean+SEM is shown. (*P<0.05, t test).

Ahmad N. Abou Tayoun, et al. PLoS One. 2012;7(4):e34665.
3.
Figure 3

Figure 3. Effects of dSK inactivation on 30 min courtship memory acquisition.. From: Roles of the Drosophila SK Channel (dSK) in Courtship Memory.

(A) Courtship indices of naïve and trained males for each group were measured during testing with mated females 30 min after STM training in large chambers. Mean+SEM is shown. (*P<0.05, **P<0.01, t test). (B) Learning indices (LIs) were calculated from courtship indices of naïve and trained males within each group as described before [22] (also see text). Note the significant 30 min memory enhancement when dSKDN is expressed either sets of neurons. Mean LI is shown. *P<0.05 for H0: LI = LI201y-GAL4, **P<0.01 for H0: LI = LIGH146-GAL4.

Ahmad N. Abou Tayoun, et al. PLoS One. 2012;7(4):e34665.
4.
Figure 5

Figure 5. A mutation in dSK results in enhanced courtship suppression during training.. From: Roles of the Drosophila SK Channel (dSK) in Courtship Memory.

(A) Courtship indices of wild-type and mutant males during individual pairing with mated females for 30 min. Courtship behavior was recorded and analyzed in 10 min bouts. Unlike controls, dSK males exhibit a significant decrease in their courtship levels during the last bout (CI30) when compared to peak courtship activity (CI20). Data are Mean ± SEM. (*P<0.05, paired t test). (B) Learning index (LI) for each group was calculated as the percentage decrease in courtship activity during the last 10 min (CI30) relative to peak courtship levels (CI20). (*P<0.05 for H0: LI = 0).

Ahmad N. Abou Tayoun, et al. PLoS One. 2012;7(4):e34665.
5.
Figure 2

Figure 2. A mutation in dSK results in decreased long-term memory 24 h after 5 h ‘extended’ training session.. From: Roles of the Drosophila SK Channel (dSK) in Courtship Memory.

(A) Long-term memory (LTM) paradigm. During training period (5 h), male flies are individually placed with (trained) or without (naïve) mated females in food chambers. After a 24 h rest period in isolation, each male was tested by pairing with a mated female for 10 min. (B) Courtship indices of naïve and trained males for each group were measured during testing period 24 h post-training. Unlike trained wild-type males (**P<0.01, t test), trained dSK flies exhibit weak courtship suppression (P>0.05). Mean+SEM is shown. (C) Learning indices (LIs) of wild-type and dSK males were calculated from courtship indices of naïve and trained males as described before [22] (also see text). Note that 24 h memory level (LI) is significantly lower for dSK males compared to wild type. Mean LI is shown. *P<0.05 for H0: LI = LIwild type.

Ahmad N. Abou Tayoun, et al. PLoS One. 2012;7(4):e34665.
6.
Figure 1

Figure 1. A mutation in dSK results in increased acquisition of short-term memory 30 min after 1.5 h ‘short’ training session.. From: Roles of the Drosophila SK Channel (dSK) in Courtship Memory.

Short-term memory (STM) paradigm. During training period (1.5 h), male flies are individually placed in small chambers with (trained) or without (naïve) mated females in small (B) or large (C) training chambers. After a 30 min rest period in isolation, each male was tested by pairing with a mated female for 10 min. (A) Courtship indices of naïve and trained males for each group were measured during testing with mated females 30 min after STM training (A) in small chambers. Note the significant suppression in courtship levels of trained males relative to that of the naïve flies within each group. Mean+SEM is shown. (**P<0.01, t test). (B) Same as in (B) except that training is limited by increasing chamber size as shown. Only trained dSK flies exhibit robust courtship suppression. Mean+SEM is shown. (*P<0.05, t test).

Ahmad N. Abou Tayoun, et al. PLoS One. 2012;7(4):e34665.

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