Animal models of GBA-PD tail, Correction studies (Rocha 2015 / AAV-A53T / Rockenstein 2016), S15 model, Sardi 2018 start

Animal models of GBA-PD (continued, A53T α-syn row)

modelphenotypeinjection / treatmentobservationquantification
A53T α-syn Mouse, 4 month old↓ GBA activity, ↑ a-syn, GlcCer/GlcSph 는 언급도 없음.AAV striatumFig 4. GBA activity 10배증가 → aSyn 잘 뵈주면 반 감소Fig 4 (4m post IX): cytosolic soluble α-syn (60±5% of control, n = 5, P < 0.01) by striatal expression of GBA (Fig. 4B). The membrane-associated α-syn also exhibited a modest reduction (81±9% of control, n = 5, P = 0.07) upon expression of GBA (Fig. 4B). However, the amount…

Correction studies

modelphenotypeInjection of GBATransgene expressionEffect
(Rocha et al. 2015, PMID 26392287),
GlcCer/GlcSph 는 언급도 없음
Thy-1-α-syn (line 61) Two- to three-month old 일명 ASO mice, TG human WT aSyn mouse 임.(At 5 months of age ASO mice display a modest amount of α-syn pathology.)

- no neurodegeneration
AAV2/5-(human) GBA1 into striatum, SN, hippocampus, 1회.

The final titers for the vectors encoding human GBA1 and GFP were 2.0 × 1012 genome copies/mL.
Transgene expression of GBA1 was first confirmed at 8 months post-gene delivery in the substantia nigra (Fig. 3A), striatum (Fig. 3D) and hippocampus (data not shown) by IF 로 정량화 (density analysis) & WB 로 정량화함.

Fig1c in SN: transgene expression 5배 증가
↑ GCase activity and ↓ accumulation of α-syn in SN & striatum.

Prevention, young mice: at 5 m, (3 m post injection 이겠) 40% reduction in HMW (soluble oligomeric) α-syn oligomeric species (by WB) in the SN and ↓ in the striatum in comparison to AAV-GFP injected mice (Fig. 2B). Fig1c in SN: GBA activity 2배 증가 aSyn oligomer 절반 감소. Fig2: In SN & Striatum ↑ LC3II.

Fig3. Therapeutic, old mice 10-11 m of age (8-m post-gene delivery): reduced the number and size of the proteinase-K resistant insoluble α-syn aggregates (staining) in SN and striatum. In SN: transgene expression ? 안나온듯 → GBA activity ? 안나온듯 → aSyn oligomer 전반 감소.
PD only model
AAV-A53T mouseselective dopamine neuron degenerationAAV-(human) GBA1 into SN (co-injection with AAV-A53T α-syn into SN), 1회.

AAV2/2-GBA1 and AAV2/2-A53T-α-syn vectors containing the coding sequences for the human GBA1 gene and for the human α-syn gene, respectively, were co-injected into the substantia nigra in the same injectate, at a final titer of 2.0 × 10? genome copies/mL.
At 24-weeks post-AAV injection, the transgene expressions of the viruses remained elevated in the dopamine neurons of the substantia nigra (Fig. 4D).

결국 우측 요약: Gba activity 2배 증가 → 정상대비 반이었던 SN neuronal loss 를 normalize함
Fig4

- ↑ GBA protein level (매우 많이, 이건 Transgene 만 본듯)
- ↑ Gba activity (WT 이니 원래 정상수준인 gba ACTIVITY에서 약 2.5배?)
- prevented nigrostriatal DA degeneration (50%) by 6 m (vs rats w AAV-GFP), AAV-GFP+A53T α-Syn RATS 에 비해선 30% Reduction 으로 보임 (원문에 comparable이라네) fig5보니 normalize라고 말할 수 있겠음
- ↓ α-syn accumulation (6 m post injection, but no data shown)
- FIG6, in SN, restored (ie prevents) p62 (ie ↑) LC3II & LAMP2 는 원래 질환모델에서 불변, in Striatum restored (ie prevents) LC3II (↑), p62는 model에서 불변인데도 올림, LAMP2는 원래 질환모델에서 불변,
PD only model
(Rockenstein et al., 2016),
GlcCer/GlcSph 는 결과에 언급도 없음
Thy1-α-Syn (line 61) js: 이건 WT a-syn overexpressing mice 임 + CBEAAV-GBA into the bilateral striatum at 2 m of ageImmunostaining for glucocerebrosidase showed robust striatal expression in AAV1-GBA1-injected Thy1-SNCA mice at 9 m of age.[at 9 m of age, ie 7 m after injection of AAV1-GBA]

- ↑ GBA activity (×6)
- ↓ (28%) total α-syn, ↓ (40%) proteinase K-resistant α-syn, amelioration of behavioral aberrations
- protection from loss of striatal dopaminergic markers (DAT and TH, 둘다 원 모델의 30% loss를 거의 WT수준으로 막음)
gba+PD model

S15 model comparison

WT질병 Model GBA-PD 모델질병 Model GBA+PD 모델치료 Model GBA-PD 모델치료 Model GBA+PD 모델
WTGBA+/L444PWT+MPTPGBA+/L444P +MPTPGBA+/L444P +MPTP+SNCA KOWT+MPTP+AAV/GBAGBA+/L444P +MPTP (ip)+AAV/GBA
GBA activity↓ (-20%)
GBA protein↓ (-30%)
A-syn↑↑ (+38.6%)↑↑=↑ (suppl fig 8, by WB, IHC in midbrain)
mitochondria↓ (size, MC I activity, respiration)
ROS
UPS
DA Neuron=↓↓↓↓↓
GFAP=↑↑↑↑↑
DA turnover=↑↑↑↑↑
DOPAC & HVA=↑↑↑↑↑
TH fiber density=↓↓↓↓↓

Sardi et al. 2018, PMID ?

Sardi et al. 2018, PMID ?Gba1 D409V/D409V mice↓ GBA activity, ↑ α-synAAV1-recombinant GBA, bilateral hippocampus, at 4 m (prevention model) & 12 m (symptomatic model) of age, sacrificed 6 m postinjection. AAV-EV: Virus containing no GBA아래는 12m에 injection model. Transgene expression 은 fig 2A 그림이고 정량화 안함. ↓ GlcSph (fig2, 반이니, 50%에서 포화된다는), ↓ proteinase K-resistant α-syn aggregates. WT+GT는 무자료GD model

GlcSph (fig2)→ 20%

Uncertain Spans

locationtranscriptionuncertainty
AAV-A53T row / titerat a final titer of 2.0 × 10<sup>?</sup> genome copies/mLthe exponent value is too small to read on this capture and is preserved as ?.