Type (MIM#) | Inheritance | Gene/protein | Severity | Fractures | Stature | DI | Sclerae | Hearing loss | Other |
Defects in collagen synthesis, structure, and assembly | |||||||||
I (#166200)[1] | AD | COL1A1 (type 1 collagen [alpha 1]) | Mild | Few to 100 | Normal height or mild short stature | Rare | Blue | Present in approximately 50% | 70 to 75% of OI is type I |
II (IIA – #166210, IIB – #610854) | AD (new mutations or parental mosaicism) | COL1A1, COL1A2 (type 1 collagen [alpha 1 and 2]) | Perinatal lethal | Multiple at birth | Severely short stature | Yes | Dark blue/gray | – | – |
AR | CRTAP, P3H1 (cartilage-associated protein/prolyl 3-hydroxylase 1) | ||||||||
III (#259420) | AD | COL1A1, COL1A2 (type 1 collagen [alpha 1 and 2]) | Severe | Multiple at birth | Very short stature | Yes | Grayish | Frequent | – |
AR | CRTAP, LEPRE1, PP1B (cartilage-associated protein/prolyl 3-hydroxylase 1/cyclophilin B) | ||||||||
IV (#166220)[2] | AD | COL1A1, COL1A2 (type 1 collagen [alpha 1 and 2]) | Mild to moderate | Multiple in neonatal period or infancy | Moderate short stature | Some patients | Grayish | Reported in some | – |
Histologically distinct defects in bone mineralization | |||||||||
V (#610967)[3-6] | AD | IFITM5 (bone-restricted IFITM-like) | Moderate to severe | Multiple | Moderate short stature | No | White | No | – |
VI (#613982)[7-9] | AR | SERPINF1 (pigment epithelium-derived factor) | Moderate to severe | Multiple between 6 and 18 months of age | Mild short stature | No | White | No | – |
Collagen-folding protein abnormalities in prolyl-3-hydroxylation complex[10-13] | |||||||||
VII (#610682) | AR | CRTAP (cartilage-associated protein) | Moderate | Multiple | Mild short stature | No | White | No | – |
VIII (#610915) | AR | P3H1 (prolyl 3-hydroxylase 1) | Lethal or severe | Multiple | Short-limbed dwarfism | No | White | Not reported | – |
IX (#259440) | AR | PP1B (cyclophilin B) | Lethal or severe | Multiple | Short-limbed dwarfism | Yes | Blue | No | – |
Collagen-processing and cross-linking defects[14,15] | |||||||||
X (#613848) | AR | SERPINH1 (heat shock protein 47) | Lethal or severe | Multiple | Severe short stature | Yes | Blue at birth | Not reported | – |
XI (#610968)[16,17] | AR | FKBP10 (FK506-binding protein 65) | Severe | Multiple | Severe short stature | No | Gray/white | Not reported | Pathogenic variants in FKBP10 also cause Bruck syndrome type 1 |
XII (#613849)[18] | AR | BMP1 (bone morphogenetic protein 1) | Moderate to severe | Multiple | Short stature | No | White | Reported in some | Can have osteopenia or bone fragility |
Osteoblast lineage abnormality | |||||||||
XIII (#614856)[19-22] | AR | SP7 (osterix) | Moderate to severe | Multiple | Short stature | No | White | No | – |
XIV (#615066)[23-25] | AR | TMEM38B (trimeric intracellular cation type B) | Moderate to severe | Multiple | Short stature | No | White to blue | No | Cardiovascular defects and endocrine concerns |
XV (#615220)[26-28] | AR | WNT1 (Wnt family member 1) | Moderate to severe | Multiple | Short stature | No | White | No | Muscle hypotonia and possible neurologic defects including intellectual disability |
XVI (#616229)[29,30] | AR | CREB3L1 (old astrocyte specifically induced substance [OASIS]) | Severe | Multiple | Short stature | No | White to blue | Reported in some | Antenatal presentation |
XVII (#616507)[31,32] | AR | SPARC (osteonectin) | Severe | Multiple | Severe short stature | Yes | White/gray | Yes | May present initially as significant neuromuscular weakness with fractures |
Newer forms of OI | |||||||||
XVIII (#617952)[33] | AR | TENT5A (family with sequence similarity 46 member A) | Severe | Multiple | Severe short stature | Yes | Blue/bluish gray | Yes | Developmental and speech delays and autonomic nervous system dysfunction Overlap with Stuve-Wiedemann syndrome |
XIX (#301014)[34] | XLR | MBTPS2 (site 2 protease) | Severe | Multiple | Severe short stature | No | Blue | Yes | Elevated urinary pyridinoline cross-links |
XX (#618644)[35] | AR | MESD (mesoderm development LRP chaperone) | Lethal in the early neonatal period or severe | Multiple | Severe short stature | Yes | Blue | Reported in 1 individual | Can include developmental delay/intellectual disability Several patients died from respiratory failure |
XXI (#609024)[36] | AR | KDELR2 (KDEL endoplasmic reticulum protein retention receptor 2) | Moderate to severe | Multiple | Short stature | Yes | Blue/bluish gray | Yes | Low bone mass |
XXII (#619795)[37] | AR | CCDC134 (coiled-coin domain-containing protein 134) | Moderate to severe or lethal in the neonatal period | Multiple | Short stature | Yes | White to gray (variable) | Reported in 1 individual | Antenatal presentation |
Data from: