Am I conscious, or is it necessary to eliminate this remote possibility? If I manage to die without being predicted or copied, and my brain is unrecoverable after my death, then can we say that I was conscious in retrospect?

As for the unlikely possibility of an emergent Boltzmann brain, I think that maybe resolved by retro-causality in a Wheeler Participatory Anthropic Cosmology. A Cybernetic (Cyclic Loop) Quantum Ontological Cosmology.


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Myocardial B cell transcriptional profiles differ from those of circulating B cells. Our results did not exclude the possibility that myocardial B cells might simply represent circulating B cells that were left in the myocardial vasculature at the time of organ harvesting. To address this question, we first compared our standard organ perfusion protocol with large-volume retrograde perfusion after aortic cannulation and confirmed that even the most stringent perfusion protocol did not eliminate myocardial B cells. (Supplemental Figure 2). Then, we performed single cell sequencing of FACS-sorted myocardial B cells and B cells sorted from circulating blood using the Chromium kit and instrument from 10x Genomics (accession number GSE142515). The myocardial and circulating B cell samples were collected from the same mice and at the same time. The results showed that the myocardial B cell transcriptional profile distinctly differed from that of circulating B cells (Figure 4A). We identified the top 5 genes with the highest differential expression levels and frequencies between myocardial and circulating B cells (Supplemental Table 1). Among these 5 genes, we identified 2 that had either available antibodies for flow cytometry (CD83) or an available reporter strain (Nr4a1). Flow cytometry analysis showed that myocardial B cells had higher CD83 and NR4a1 expression levels than circulating B cells (Supplemental Figure 2), which confirmed the gene expression analyses. Next, we performed gene set enrichment analysis (GSEA) (17) of the differentially expressed genes in heart and blood B cells. Table 1 shows that myocardial B cells displayed activation of the MAPK signaling pathway, B cell receptor signaling pathway, antigen processing and presentation, chemokine signaling pathway, and leukocyte transendothelial migration.

Mice. We used 10- to 12-week-old female mice for all experiments unless otherwise specified. All mice were purchased from the Jackson Laboratory. The following strains were used: WT C57BL/B6J strain N. 000664, B6.129S2-Ighmtm1Cgn/J (MT) strain N.002288, B6.SJL-Ptprca Pepcb/BoyJ (CD45.1) strain N. 002014, and B6.129S7-Rag1tm1Mom/J (Rag1) strain N. 002216. To generate CD19 reporter mice, B6.129P2(C)-Cd19tm1(cre)Cgn/J males (CD19-cre) were bred with B6.Cg-Gt(ROSA)26Sortm14(CAG-tdTomato)Hze/J females (tdTomato-lox), and F1 mice were studied. For antibody-mediated B cell depletion, 3-week-old WT mice were injected i.p. with 100 g of anti-CD20 antibody (BioLegend, clone SA271G2, catalog 152104) or isotype control. After 1 week, mice were reinjected retro-orbitally with 200 g of anti-CD20 antibody or isotype control and thereafter reinjected with the same amount of antibody every 4 weeks for a total of 3 retro-orbital injections.

For splenocyte adoptive transfer, the spleen of one 10-week-old CD45.1 WT mouse was minced and passed through a 40-m cell strainer. The cell solution was centrifuged, and RBCs were lysed in ACK lysis buffer (Invitrogen) for 15 minutes on ice. Splenocytes were resuspended in 200 L of sterile PBS and retro-orbitally injected in an age/sex-matched Rag1 mouse.

Flow cytometry. For flow cytometry experiments, mice were euthanized in a CO2 chamber. The hearts were perfused with cold PBS via high-pressure injection of 3 mL of PBS in the atria using a 3-mL syringe and an 18-gauge needle. Alternatively, hearts were retrogradely perfused with 2 mL of Krebs-Henseleit buffer after cannulation of the ascending aorta carefully dissected from extracardiac tissue under a stereo microscope, finely minced, suspended in 3 mL of DMEM, and digested with 120 U of DNAse (MilliporeSigma), 180 U of hyaluronidase (MilliporeSigma), and 1350 U of collagenase (MilliporeSigma) for 60 minutes at 37C. The digested material was filtered through 40-m filters and pelleted by centrifugation (250 g for 3 minutes at 4C) in FACS buffer (PBS with 2% FCS and 2 mM EDTA). RBCs were lysed in ACK lysis buffer (Invitrogen) for 5 minutes at room temperature, and the remaining cells were resuspended in 300 L of FACS buffer. Murine samples were labeled with the following fluorescently conjugated antibodies (from BioLegend): CD45 (clone 30-F11, PerCP/Cy5.5 conjugated), CD19 (clone 1 D3/CD19, APC conjugated), CD11b (cone M1/70, BV510 conjugated or PE conjugated), IgM (clone RMM-1, Alexa Fluor 488 conjugated), CD5 (clone 53-7.3, PE/Cy7 conjugated), CD45.1 (clone A20, Pacific Blue conjugated), CD45.2 (clone 104, PerCP/Cy5.5 conjugated), Ly-6G (clone 1A8, FITC conjugated), CD64 (clone X54-5/7.1, PE conjugated), Ly-6C (clone HK1.4, APC/Cy7 conjugated), CD4 (clone GK1.5, PE conjugated), and CD8 (clone 53-6.7, Alexa Fluor 488 conjugated). Human samples were digested similarly as the murine samples and stained with the following antibodies: CD45 (clone Hl30, PE conjugated, Beckton Dickinson) and CD19 (clone HIB 19, APC conjugated, BioLegend). Cells were stained for 30 minutes on ice and washed in FACS buffer before analysis. All anti-murine antibodies from BioLegend were used at 0.2 L per 300 L sample, with the exception of the anti-CD45.2 antibody, which was used at 1 L per 300 L. Anti-human antibodies were used at 1 L/100 L dilution. FACS was performed using Becton Dickinson analyzers (LSRII, Canto, X20, or Fortessa). Compensation controls were generated using UltraComp ebeads (Invitrogen) and verified using single-color control samples obtained by staining primary splenocytes (only for murine samples). Gating strategies are summarized in Supplemental Figure 5. Cell sorting was performed using a FACSAria sorting instrument (Becton Dickinson) at the Washington University Department of Pathology Flow Cytometry and Sorting Core. In cell-sorting experiments, dead cells were excluded using the Live/Dead fixable aqua dye (BioLegend). Intravascular cells were labeled by diluting 10 L of antibody (20 g) in 150 L of sterile PBS, which was retro-orbitally injected approximately 3 minutes before sacrificing the mice.

MacMurray and most of the cast took part in Thanksgiving Reunion with The Partridge Family and My Three Sons, which aired on ABC on November 25, 1977. The retrospective special looked back at the history of My Three Sons and The Partridge Family (other than featuring single parents with a large family, the two series had no narrative, or even a studio, link). The special was notable for featuring footage from early black and white episodes of My Three Sons that, at this point in time, were not in syndication. While most of the collected casts gathered in a studio to reminisce, Demarest appeared in a brief pre-taped segment. 2351a5e196

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