EMBO/SourceData huggingface dataset:
Figure 3a, CPAP co-immunopurifies with CDC components from HeLa extracts. Centrosomal proteins Cap350 and ODF2 do not co-purify with CPAP.b, Levels of CDC components (CPAP, Aurora A, OFD1, and Nde-1) are differentially regulated in response to serum starvation and stimulation in WT and Seckel fibroblasts. Specifically, they are elevated 1h after serum stimulation, thus enabling cilium disassembly. Elevated CDC levels in WT cells correlate with an elevated level of CPAP as shown in Fig. 2 as well as with the expression of cyclin A, a G1-S marker. GAPDH was used as a loading control indicating an equivalent amount of WT and Seckel fibroblast total proteins were loaded.c. WT CPAP (WT-cells IP) but not Seckel variant CPAP (Seckel cells IP) co-immunopurifies with CDC components from asynchronously grown WT and Seckelfibroblastscell extracts. The IP samples were adjusted so that equivalent amounts of immunoprecipitatedCPAP were used in samples. Seckel (5x) and WT (1x) fibroblast cell extracts were used as input controls to show the efficacy of the various antibodies. Note that CPAP abundance in Seckel cells is ~5 times lower than that of WT cells. CentrosomalproteinsCap350 and ODF2 do not co-purify with CPAP indicating the specificity of CPAP interaction with CDC components.d, GST pull down (i) and immunopurification assays (ii) of CPAP's CC5 domain demonstrate its sufficiency in mediating CPAP-CDC protein interactions. The CC5 fragment is expressed as a GFP fusion protein in HeLa cells and immunopurified using anti-GFP antibodies. HeLa extracts were used as input controls. CAP350 does not co-purify with CPAP. Both Cap350 and ODF2 are not pulled down by CPAP's CC5 domain.
Figure 4a, Seckel NPCs fail to efficiently recruit CDC components. Fraction of non-ciliated and ciliated WT and Seckel NPCs. Ciliated cells are further quantified and grouped based on whether they are positive or negative for Aurora A and CPAP at their basal bodies. Scale bar 0.5 μm (i-ii). Proportion of ciliated cells is higher in Seckel NPCs (**p<0.01). Compared to WT, a higher proportion of Seckel NPCs lack Aurora A and CPAP in their basal bodies (*p<0.05 for Auroa A and ***p<0.001 for CPAP). Ordinary Two-way ANOVA followed by Sidak's multiple comparisons test. n = 3 independent experiments. 127 cells for WT and 97 cells for Seckel. Error bars are s. e. m. (iii) Seckel cells consistently contain Nde-1 and Ofd1 with a significantly lesser intensity. t test; error bars are s.e.m.; n = 3 independent experiments. 110 cells for WT and 100 cells for Seckel.b, Proportion of ciliated cells is higher in Seckel NPCs. Error bars are s. e. m. ** p<0.01, t-test. n = 3 independent experiments. 127 cells for WT and 97 cells for Seckel.c, Seckel NPCs exhibit longer cilia. Error bars are ± s. e. m. *** p<0.001, t-test. NPCs were derived from two independent iPS clones. n = 3 independent experiments. 146 cells for WT, 135 cells for Seckel (clone 1) and 202 (clone 2).d, SeckelNPCs show reduced proliferation and delayed G1-S transition. Error bars are ± s. e. m. *** p<0.001 (EdU), * p<0.05 (Cyclin-A), t-test. For cyclin A, n = 3 independent experiments. 270 cells for WT and 232 cells for Seckel cells. For EdU, 700 cells for WT and 1630 cells for Seckel.e, Olomoucine triggers differentiation of WT NPCs into TUJ1-positive neurons under non-differentiating conditions. Error bars are s. e. m. *** p<0.001, Ordinary Two-way ANOVA followed by Tukey's multiple comparisons test. n = 3 independent experiments. 298 cells for untreated, 151 cells for DMSO and 146 cells for olomoucine, 25 μM.f, Seckel NPCs differentiated into TUJ1-positive neurons under non-differentiating conditions. Error bars show ±s. e. m. *** p<0.001, t-test. n = 3 independent experiments. 633 cells for WT and 275 cells for Seckel. Scale bar 5 μm.g, Expression of CPAP-GFP or CPAP-CC5-GFP in Seckel NPCs slightly increases nestin-positive cells (i), decreases neuronal differentiation (for CC5 *p<0.05) (ii), decreases ciliary length (for CPAP ***p<0.001 and for CC5 **p<0.01) (iii), elevates mitotic index (for CC5 *p<0.05) (iv) and decreases the number of ciliated cells (for CPAP *p<0.05 and for CC5 **p<0.01) (v) compared to control (mock electroporation). Error bars show s. e. m. One-way ANOVA followed by Tukey's multiple comparisons test. n = 3 independent experiments with >350 (nestinstaining, differentiation and mitotic index), and >70 cells (cilium length) cells.
Figure 5a-b, siRNA-mediated down regulation of CDC components in WT NPCs causes longer cilia (Ofd1 ***p<0.001, Nde1 **p<0.01), retarded cilia disassembly as shown by increased numbers of ciliated cells (Ofd1 **p<0.01, Nde1 *p<0.05) and differentiation of NPCs into TUJ1 positive cells (Ofd1 **p<0.001, Nde1 *p<0.01). In controls, a non-targeting siRNA (scrambled) is used. Western blots at right validate siRNAs-mediated Nde1 and OFD1 depletion. Error bars are s. e. m. Ordinary Two-way ANOVA followed by Sidak's multiple comparisons test. n = 3 independent experiments. 275 cells for scrambled, 423 cells for Ofd1 siRNA and 255 cells for Nde1 siRNA.a-b, siRNA-mediated down regulation of CDC components in WT NPCs causes longer cilia (Ofd1 ***p<0.001, Nde1 **p<0.01), retarded cilia disassembly as shown by increased numbers of ciliated cells (Ofd1 **p<0.01, Nde1 *p<0.05) and differentiation of NPCs into TUJ1 positive cells (Ofd1 **p<0.001, Nde1 *p<0.01). In controls, a non-targeting siRNA (scrambled) is used. Western blots at right validate siRNAs-mediated Nde1 and OFD1 depletion. Error bars are s. e. m. Ordinary Two-way ANOVA followed by Sidak's multiple comparisons test. n = 3 independent experiments. 275 cells for scrambled, 423 cells for Ofd1 siRNA and 255 cells for Nde1 siRNA.c, VX680 (0.5 μM, a concentration that will specifically allow neuronal differentiation) was used to inhibit Aurora A activity. Bar diagrams below show quantifications. Compared to DMSO-treated control NPCs, a higher proportion of VX680 treated NPCs are ciliated (***p<0.001), exhibiting longer cilia (***p<0.001) and show Tuj1 positive neurons (***p<0.001). Error bars are s. e. m. For ciliated cells and cilium length: n = 3 independent experiments. 164 cells for DMSO-treated and 77 cells for VX680-treated. For NPC differentiation: n = 4 independent experiments. 286 cells for DMSO-treated and 118 cells for VX680-treated. Scale bar 1 μm.d, Cell cycle progression of siRNA or VX680 treated WT NPCs compared to control assessed by EdU incorporation for 24 hours. Inhibition of Ofd1 (*p<0.05), Nde1 (**p<0.01) and Aurora A (***p<0.001) caused significantly reduced incorporation of EdU.e-g, Western blots show that CPAP targeting siRNA treatment depletes endogenous CPAP. Both low -and high -exposures are given (e). Increased cilia length and NPC differentiation upon expression of RNAi-resistant CPAP E1235V compared to WT CPAP (f-g). Error bars are s. e. m. *** p<0.001 (cilia length), * p<0.05 (differentiation), t-test. For cilia length: n = 4 independent experiments. 25 cells for CPAP, 47 cells for CPAP E1235V. For differentiation: n = 4 independent experiments. 145 for CPAP and 81 for CPAP E1235V. Scale bar 1 μm.
Figure 6a, iPS-derived 14-day old organoid displaying complex morphological structures of brain-like tissues, parenthesis. Scale bar 500 μm. The ventricular zone (VZ) with radial glial cells stained with nestin (magenta) and neurons stained with TUJ1 is shown at higher magnification. Scale bar 20 μm.b, Reduced Nestin/Pax-6-positive progenitors and increased TUJ1-positive neurons in Seckel organoids. In ventricular zones of WT organoids, there are significantly more Pax6 positive cells than TUJ1 positive cells, which is not the case in Seckel organoids (*p<0.05). TUJ1/Pax6 ratio in graph on the right shows significantly more TUJ1 positive cells vs. Pax6 cells in Seckel organoid ventricular zones (* p<0.05). Error bars are s. e. m. Ordinary Two-way ANOVA followed by Sidak's multiple comparisons test. n = 10 WT organoids (2520 cells). Seckeln = 10 organoids (2024 cells). Scale bar 20 μm.c, (i) Seckel organoid tissues contain increased numbers of cilia with an obvious observation of enlarged lateral ventricular lumen (* p<0.05). Graph at far right shows an increased lumen area as well as thinner ambient VZ in Seckel organoids. (*p<0.05). Error bars are s. e. m. t-test. n=6 for WT organoid and 6 for Seckel organoid. Scale bar 20 μm. (ii) Seckel organoid cells display longer cilia. Error bars are s. e. m. *** p<0.001, t-test. n=3 for WT organoids and 4 for Seckel organoids. Scale bar 1 μm.d, Seckel organoids electroporated with constructs expressing GFP alone (i), GFP with CC5-GFP and (ii) GFP with CPAP-GFP (iii). Middle panel shows staining with anti-GFP antibodies (red) to show the transfected area. Note the presence of increased Pax6-positive (magenta) NPCs in CC5 and CPAP electroporated tissues compared to GFP control. Likewise, there is a larger neural epithelium with multiple RGs (arrowheads). Bar diagrams at right shows rescue effects of CPAP and CC5 electroporation compared with GFP alone (iv) lower TUJ1/Pax6 ratio (**p<0.01 and ***p<0.001 respectively) (v) smaller lumen diameter (**p<0.01) and (vi) shorter cilia length (**p<0.01 and ***p<0.001 respectively). Error bars are s. e. m. One-way ANOVA followed by Dunnett's multiple comparisons test. n = 3 organoids with 225 cells for GFP, 537 cells for CPAP and 569 for CC5. At least 10 ventricles from 3 independent organoids were used to measure the CPAP diameter. t test. Error bars are s.e.m. Scale bar 20 μm.e, Rescue effect of CC5 and CPAPelectroporation on cleavage planes of phospho-vimentin-positive RGs in Seckel organoids. Compared to GFP control, electroporation of CC5 or GFP increases the proportion of horizontally orientated SeckelRGs (for CC5 ***p<0.001) and decreases the portion of obliquely (for CC5 *p<0.05) or vertically oriented SeckelGFP (for CPAP and CC5 **p<0.01). Error bars are s.e.m. Two-way ANOVA followed by Tukey's multiple comparisons test. n = 4 organoids. 100 cells for GFP control, 112 cells for CPAP and 99 cells for CC5.
Figure 1B Competitive inhibition of mitochondrial protein import by clogger proteins inhibits cell growths. Yeast cells expressing clogger proteins (cytochrome b2-DHFR and cytochrome b2∆19-DHFR) or cytosolic DHFR for comparison under control of the galactose-inducible promoter were grown to mid-log phase on lactate medium. Ten-fold serial dilutions were dropped on lactate (no induction) or lactate with 0.5% galactose medium (induction). MTS, matrix-targeting signal.E Levels of the proteasome protein Pre6 were detected upon expression of cytosolic DHFR or clogger by Western blotting and quantified from three replicates. Cells were grown in lactate medium and clogger expression was induced for 4.5 h with 0.5% galactose before samples were harvested and lysed. Data are displayed as mean ± standard deviations from n = 3 independent biological replicates.
Figure 2A The clogger was expressed in wild type (WT) and ∆rpn4 (∆) cells for 4.5 h with medium containing 0.5% galactose. Medium was exchanged for a non-inducing lactate medium. Precursor (pre) and mature (m) forms of the b2∆-DHFR clogger were visualized by Western blotting using a DHFR-specific antibody.G Signals of Hsp104 and Hsp42 before and after clogger induction in wild type and ∆rpn4 cells. The cytosolic soluble DHFR protein was expressed for control. The strains were grown in lactate medium and clogger expression was induced with 0.5% galactose for 6 h.
Figure 3A Cytosolic DHFR (control) or the clogger protein b2-DHFR were expressed in wild type and ∆rpn4 cells for 4.5 h. The distribution of constitutively expressed Hsp104-GFP was visualized by fluorescence microscopy. Diameter of Hsp104-GFP-bound aggregates were quantified. . Data are displayed as mean ± standard deviations from n = 36 independent biological replicates. Significance was assessed using two-sided, paired Student's t-test. P values are indicated as asterisks ** p ≤ 0.01, **** p ≤ 0.0001. See also Fig. EV4A for quantification of the number of aggregates per cell.B Hsp104-GFP was purified on nanotrap sepharose in wild type cells that were grown at the indicated temperatures. SN, supernatant representing the non-bound fraction. The signals for Ssa1 and Sod1 are shown for control.
Figure 5A The mitochondrial proteins Pdb1, Mam33 and Aim17 were co-expressed for 4.5 h with clogger as fusions with the red fluorescent protein RFP (mCherry). Fluorescence microscopic images of the indicated mitochondrial proteins visualized 4.5 h after induction of the clogger or cytosolic DHFR for control. For quantification of colocalization B Mutants lacking Hsp104 and Hsp42 were transformed with Aim17-expressing plasmids and grown to mid-log phase in lactate medium. Clogger expression was induced for 4.5 h with 0.5 % galactose before microscopy was perfomed. Please note that in the absence of Hsp42 and Hsp104, no Aim17-RFP-containing granules are formed. C Wild type cells were transformed with plasmids for the simultaneous expression of the clogger and an N-terminally truncated version of Mam33-RFP (both under control of GAL promoter) together with constitutively expressed Hsp104-GFP (TPI promoter) . The cells were grown on lactate plus 0.5% galactose-containing medium for 4.5 h. The distribution of the fluorescent proteins was visualized by microscopy.D Wild type cells expressing Hsp104-GFP were grown on glucose or lactate medium to log phase. Cells were diluted and visualized by life cell imaging. Please note, that in glucose media, Hsp104-GFP is initially dispersed in cells and only aggregates when cells become stationary. In contrast, Hsp104-GFP-containing granules are frequent on lactate medium even at log phase. See movie EV1 for life cell imaging of glucose-grown cells.
Figure 6E Clogger and Mam33-HA were co-expressed for 4.5 h in wild type and ∆hsp42 cells. Mitochondria were isolated and subjected to Western blotting to detect mature (m) and precursor (pre) forms of Mam33-HA. The matrix protein Tim16 served as loading control.F The mitochondria used for E were treated with proteinase K (PK) to remove surface-exposed proteins. Mitochondrial membranes were lysed with NP-40 and soluble (S) and aggregated (P) proteins were separated by centrifugation. T, total.G To measure the toxicity of clogger expression, clogger proteins were induced for 24 h with lactate medium containing 0.5 % galactose in the mutants indicated. Aliquots were removed and the number of living cells were assessed by a plating assay on glucose-containing plates. The resistance of ∆rpn4 to clogger expression depends on Hsp104 and Hsp42. Data are displayed as mean ± standard deviations from n = 3 independent biological replicates.
Figure 1A. 3D image of an EGFP-CaaX-expressing Ramos B cell embedded in Matrigel (left) and segmentation of the inner dome (center) using our own script based on Watershed segmentation and segmentation of the cell surface (right) using an nnU-Net model that we trained based on our own-generated ground truth.
Figure 3C. Cluster density at surface features. IgM-BCR cluster density within different topographical features quantified as cluster count per surface feature volume.F, G, H. Continuous analysis of IgM-BCR cluster density using geodesic distance maps initiated from (F) microvilli tips towards microvilli roots, (G) centerline of ridges towards cell body surface, and (H) nodes towards cell body surface.
Figure 4A, B. Sum projections of the skeletonized ridge network and microvilli (A) and segmented IgM-BCR clusters (B) in an untreated and 100 µM CK-666-treated cell for 15 consecutive time frames amounting to 37.5 s.G. Continuous analysis of IgM-BCR cluster density in 15-30 min 100 µM CK-666-treated cells using geodesic distance maps initiating from distinct surface features (centerline of ridges, nodes and microvilli tips) (to compare to untreated in Fig 3F). Data points and the dotted lines represent mean ± SD. H. Time-course images of EGFP-CaaX and IgM-BCR intensity in an elongating microvillus (purple, MV mask).
Figure 5A. IgM-BCR cluster distribution upon Ag stimulation. Ramos B cells in the Matrigel were stimulated with 50 ng/ml NIP-15-BSA Ag for at least 15 minutes. Ag-MC on the B cell surface were segmented and overlaid with the ridge network (including microvilli) with a 1.25x and 3.0x local intensity cut-off for cluster detection.G, H. Staticity scores for different surface features (R+N, MV) (G) and for segmented IgM-BCR clusters assigned to different surface features (H) in unstimulated and Ag-stimulated cells. Violin plot solid lines represent the median and dotted lines represent the quartiles.
Figure 6A. Phalloidin-Alexa555 staining of fixed and permeabilized Ramos B cells expressing EGFP-CaaX and IgM-BCR with or without 30 min 2 µM LatA treatment.D. Surface-masked EGFP-CaaX and IgM-BCR signal and overlay of segmented elevations (yellow) with the surface-masked IgM-BCR signal in cells treated with LatA and LatA+Ag (50 ng/ml NIP-15-BSA). E. Time frames from a LatA+Ag cell showing directed movement of Ag-MC towards the elevations (yellow). Each Ag-MC shown with a different colored arrow.F. IgM-BCR intensity enrichment within all the segmented clusters in LatA and Lat+Ag cells. G. Cluster density at surface features. Quantification of the IgM-BCR cluster density in terms of cluster count per surface feature volume for all segmented IgM-BCR clusters (left panel, local contrast cutoff = 1x) and for Ag-MC (right panel, local contrast cutoff = 3x). HI. Surface-masked EGFP-CaaX and IgM-BCR signal for a LatA and LatA+Ag cell and the sum projections of their segmented IgM-BCR clusters (duration: 37.5 s). IgM-BCR clusters are color-coded (green and yellow) according to their assigned surface region.
Figure 2D) Cells expressing empty vector (EV), or PRKAA1-myc, PRKAB2 and PRKAG2-FLAG (AMPK) alone or with myc-Ulk1 WT (ULK) were cultured in full medium (F), EBSS (St), or serum-free medium (SFM) alone or in the presence of 991 (1µM) or MRT68921 (1μM) for 90 minutes as indicated. 2% Loading control and pull down samples were analysed by Western blot.
Figure 3A) VPS15-ZZ was co-expressed with Ulk1 and Ulk2 wild type (WT) or kinase inactive (KI) before analysis by Western blot. An electrophoretic mobility shift in VPS15-ZZ was noted with WT only.
Figure 4A) Lysates from 3 control clones and 7 VPS15 CRISPR clones were analysed by Western blot. LC3 and p62 accumulation as well as depletion of VPS34 CI components was observed in all 6 sgA-derived clones.B) Controls and 6 VPS15 CRISPR KO clones were starved for 1 hr, fixed and imaged for WIPI2 (green). Depletion of VPS15 was associated with a block in WIPI2 puncta formation and large vacuoles (red asterisks). Quantification of WIPI2 spots, mean +/- SEM, n=3.D) Wild type (WT), 6SA or 6SE VPS15-HA, or empty vector (EV), were expressed in VPS15 KO or HEK293A cells. Cells were starved for 1 hr and the distributions of WIPI2 (green), HA (red) and LC3 (blue) were assessed, mean +/- SEM, n=4.
Figure 5D) VPS34 CI components expressed with Ulk1 1-427 WT or KI as indicated. After starvation for 1 hr in the presence or absence of MRT68921 (ULK inhibitor), cells were lysed and VPS34 CI coimmunoprecipitated via ATG14-ZZ. VPS15 S861 phosphorylation was increased in the presence of active Ulk1. VPS15 pS861/total VPS15 was quantified, mean +/- SEM, n=3.E) HEK293A were transfected with VPS34 CII components and Ulk1 1-427 WT or KI and treated as indicated before VPS34 CII co-immunopurification via UVRAG-ZZ. Samples were analysed by Western blot as in D, revealing that Ulk1 can similarly phosphorylate VPS15 at S861 when incorporated into CII. Quantifications show mean of 4 independent experiments +/-SEM, ***p<0.001 [one-tailed ANOVA].
Figure 6A) HEK293A, VPS15 KO control and stably rescued VPS15 KOs (sgA-B3) were starved for 1 hr before WIPI2 (green), LC3 (red) and DNA (Hoechst, blue) were visualised. Quantification of WIPI2 puncta number per cell, mean +/-SEM, n=5.B) Stably rescued VPS15 KO (sgA-B3), HEK293A and VPS15 KO control cells were starved for 1 hr with (SB) or without (St) 100nM Bafilomycin A1, or cultured in full media (F). Quantification shows LC3II/Actin, mean +/-SEM, n=5.
Figure 7A) HEK293A were treated with VPS34-IN1 (1μM) alone or in the presence of MRT68921 (1μM) for the indicated time. Untreated VPS15 KOs were included as a positive control and lysates analysed by Western blot. Identical samples were loaded in parallel for VPS34, ATG13, PRKAB2 analysis, indicated by dashed line.E) HEK293A and VPS15 KO cells were fed, or starved for 2 hrs before fixation, and labelling with ULK1 (green), ATG9A (red) and GM130 (blue). Dashed boxes show magnified regions of interest.
Figure 8B) HEK293A were transfected with siRNAs targeting ATG14, UVRAG or p62, or with non-targeting siRNA (RISC-free, RF) and cells were treated with VPS34-IN1 (IN1; 1μM) for 0, 4 or 18 hrs as indicated. Quantification of ATG13 pS318/Total ATG13, mean +/- SEM, n=3. Identical samples were loaded onto 2 separate SDS PAGE gels for Western blot analysis, indicated by dashed line.C) Cells transfected as in B were treated with IN1 for 18 hours as indicated, fixed and labelled for ubiquitin (green), FIP200 (red) and p62 (blue). FIP200-positive bodies were quantified from 4 independent experiments with mean +/- SEM plotted. Cells transfected with ATG14 siRNA generated significantly more FIP200 bodies per cell than all other conditions tested.
Figure 1Plasma corticosterone levels at baseline, 30 minutes after induction of stress by placing mice in a clean cage, and after 90 minutes upon return in the home cage. DEX mice received an injection of dexamethasone at 0.1 mg/kg body weight 150 minutes before collecting the first blood sample (n = 5-6 animals per group). Flox and GRBATKO mice were injected with 0.02 mg/kg dexamethasone and the procedure described in (A) was followed to induce stress in order to detect potential differences between Flox and GRBATKO mice which could have been obscured by the higher concentration used in (A) (n = 6-7 animals per group).GR mRNA levels in BAT of Flox and GRBATKO mice. Organs were harvested in the stressed condition after placing mice for 30 minutes in a clean cage. Half of the animals received a dexamethasone injection 180 minutes before onset of the procedure, controls received an injection with saline (n = 5-6 animals per group).Serum corticosterone levels under stressed conditions in Flox and GRBATKO mice (n = 5-6 animals per group). Blood glucose levels (n = 5-6 animals per group).
Figure 2Knockdown of GR in BAT assessed by immunoblotting. Β-Tubulin was used as loading control. Quantification of immunoblot in (A) using Image Lab (n = 6 animals per group).Body temperature over the course of the cold exposure, determined daily (n = 6 animals per group).Body weight at the end of the cold exposure (n = 6 animals per group).BAT weight at the end of the cold exposure (n = 6 animals per group).Representative Hematoxilin and eosin staining image of BAT of cold-exposed Flox and GRBATKO mice. Scale bar 50 µm.Triglyceride content in BAT from Flox and GRBATKO animals (n = 5-6 animals per group).Heatmap of mean gene expression fold changes in thermogenic marker genes based on BAT microarray analysis comparing GRBATKO vs Flox control animals, indicating unchanged thermogenic marker gene expression. Color gradient ranges from 2-fold higher expression in GRBATKO over Flox controls (red) to 0.1-fold (lower) expression (blue) (n = 4 animals per group).Volcano plot from microarray gene expression data as in (I), with cut-off values for the adjusted p-value <0.1 and fold change >1.5.Serum corticosterone levels (n = 6 animals per group).
Figure 3Body weight after 16 h fasting and 6 h chow refeeding at 22°C (n = 6 animals per group)Body temperature assessed after 16 h fasting and subsequent refeeding for 6 h (n = 6 animals per group).Blood glucose (n = 6 per group).Serum insulin and corticosterone levels determined by ELISA (n = 6 animals per group).Serum NEFA and triglycerides concentration in Flox and GRBATKO mice after fasting and refeeding (n = 6 animals per group).