Mucopolysaccharidosis type VII (Sly syndrome) OMIM 253220
In Mucopolysaccharidosis type VII (GUSB, OMIM 253220), the master switch sits on the ↓ DOWN branch ([F] forced below); the healthy state is the ON well. The forced corrective direction is to raise s toward ON branch (polarity: supply). Classification: ✓ Recovers an existing standard. Direction only — no dose, no efficacy magnitude.
The disease maps to an R19 double-well whose corrective lever is read straight off the cusp (barrier 0.5597, γ 1.4963, spinodal 0.7045). The corrective direction is forced [F]; the agent names below are direction-concordant labels at grade [O] (no dose, no efficacy or safety magnitude). This is a research hypothesis offered to experts, not medical advice.
The emergence switch
The switch for Mucopolysaccharidosis type VII is an R19 double-well emerged from the real proximal-promoter DNA of GUSB. Its geometry is fixed by measured stiffness γ (never fitted); the numbers below are read directly off that cusp.
emergent axis
↓ DOWN [F]
healthy branch
ON
lesion
LOF_null
γ (stiffness)
1.4963
barrier
0.5597
spinodal
0.7045
s_on / s_off
1.2232 / -1.2232
fragility
0.18
corrective polarity
supply
forced direction
raise s toward ON branch
Chemistry feasibility (DIRECTION only [O]). small-molecule recrossing of the fold is geometrically harder (barrier 0.5597 at neutral drive; lower barrier = smaller drive to supply). [O] -- no affinity/potency/dose/efficacy asserted.
The derived corrective lever
The cusp forces a corrective direction: raise s toward ON branch. This is the load-bearing output of the framework — it is [F] forced, and it is falsifiable. 2 lever families are derived; the lead is h-restore (drive modulator).
Mechanism. supply / restore the positive drive (replace-or-agonise the missing competence)
Applies to. allele-agnostic (downstream/environmental tilt)
favoured when the switch is fragile -- a small drive shift recrosses the fold
Falsifier. If supplying/agonising GUSB (raising the switch drive) does NOT move the DOWN [F] switch toward the healthy branch in a GUSB-deficient model, the h-restore(supply) lever is refuted for this axis.
Falsifier. If a folding-stabiliser/chaperone does NOT re-deepen the healthy well for a residual GUSB allele (no rescue that a null allele lacks), the gamma-restore lever is refuted; null alleles are excluded by construction.
Agents mapped onto the lever
✓ Agreement with established practice. The corrective direction derived here (raise s toward ON branch) independently matches an agent already in clinical use for this disease: recombinant human beta-glucuronidase enzyme replacement (vestronidase alfa / Mepsevii, FDA 2017-11-15, the first approved therapy for MPS VII) -- DIRECT on the GUSB gene product. The geometry recovered known medicine — this is a validation signal for the logic, not a new treatment claim by this kit.
Existing agents whose known action is direction-concordant with the derived lever (status as pinned in the corpus; no dose, no efficacy magnitude).
agent (class)
dir.
status
phase
map
recombinant human beta-glucuronidase enzyme replacement (vestronidase alfa / Mepsevii, FDA 2017-11-15, the first approved therapy for MPS VII) -- DIRECT on the GUSB gene product
allogeneic haematopoietic stem-cell transplantation (partial systemic, limited CNS benefit) -- a clinical alternative
Yamada 1998 / Sisinni 2018 (HSCT in MPS VII / MPS, partial benefit)
increase
clinical
3
◇ in trials
⚠ Mechanism-direction only — do not self-administer; no dose (unvalidated; set by a physician / national authority); not an approved use.
Direction-only candidate leads (corpus join)
Each lead is surfaced only because its known mechanism points the same way as the derived lever, and each comes with a source and a falsifier. None is a treatment.
Mechanism. Infused recombinant beta-glucuronidase supplies the GUSB activity the disease gene cannot, restoring lysosomal glycosaminoglycan degradation. Direction: increase / supply the missing enzymatic competence. Allele scope: agnostic -- replaces the deficient gene product regardless of the GUSB variant. Pathway-specific (mapped to MPS VII via GUSB only). The supply direction recovers an approved enzyme-replacement indication; lifelong infusion biologic with cost/delivery barriers.
✓ This is a rediscovery. Vestronidase alfa (recombinant beta-glucuronidase) is approved for MPS VII (Sly syndrome); recovered by the direction logic. Lifelong infusion biologic -- cost/delivery barriers remain.
Safety (qualitative; no magnitude). infusion-associated reactions are on the label (qualitative; no magnitude); chronic biologic infusion
Falsifier. If vestronidase alfa (a pathway supply/increase agent) does NOT move the DOWN [F] switch toward the healthy branch in a GUSB-deficient model, the h-restore(supply) direction is refuted for vestronidase alfa here.
Source: FDA/EMA label: vestronidase alfa (Mepsevii), MPS VII
⚠ Mechanism-direction only — do not self-administer; no dose (unvalidated; set by a physician / national authority); not an approved use.
Evidence & provenance
What is reproduced vs. cited for this page.
element
grade
basis
R19 switch & cusp geometry (this page)
[V] verified
emerged from measured promoter γ of GUSB; deterministic, 2×sha256 identical
corrective direction
[F] forced
forced by the cusp sign; falsifiable (see lever falsifiers)
mapped agents / leads
[O] open
direction-concordance only; corpus-pinned (2026-06-21); no dose, no efficacy/safety magnitude
Reading the agent column. VALIDATION SIGNAL -- the agent is already approved / established standard for this disease, so the direction logic recovered known clinical practice. Not a new claim by this kit. GENUINE HYPOTHESIS -- no approved indication for this disease; the direction match is a direction-only, untested [O] lead. Basis field grades the evidence (investigational here / in a related condition / off-label / speculative).