A map of 22 loci on human chromosome 22.

We constructed a genetic linkage map of the entire long arm of human chromosome 22 with 30 polymorphic markers, defining 22 loci. The map consists of a continuous linkage group 110 cM long, when male and female recombination fractions are combined; average distance between the loci is 5.2 cM. All loci were placed on the map with high support against alternative orders (odds in excess of 1000:1). The order of loci presented in our map is in full agreement with that of the previous linkage maps of chromosome 22 and with the physical assignment of markers. Two markers included in this map, KI-831 (D22S212) and pEFZ31 (D22S32), allowed us to better define the region of the (11;22) translocation breakpoint specific for Ewing sarcoma. Ten additional polymorphic markers were placed on the 22-loci map with odds lower than 1000:1 against alternative locations. In total, we have introduced 29 new markers on the linkage map of chromosome 22.     

白介素22

近两年 ,发现了多种白介素 10家族新成员 :黑素瘤分化相关基因 7产物 (ｍｅｌａｎｏｍａｄｉｆｆｅｒｅｎｔｉａｔｉｏｎ ａｓｓｏｃｉａｔｅｄｇｅｎｅ 7,ＭＤＡ 7)、单纯疱疹病毒转化的Ｔ淋巴细胞产生的ＡＫＫ 15 5蛋白、Ｚｃｙｔｏ 10、巨细胞病毒编码ＩＬ 10 (ｃｍｖＩＬ 10 )、白介素 19(ＩＬ 19)、ＩＬ 2 0和ＩＬ 2 2。本文重点简述ＩＬ 2 2及其受体的研究进展。ＩＬ 2 2也称为ＩＬ 10相关Ｔ细胞衍生的可诱导因子 (ＩＬ 10 ｒｅｌａｔｅｄＴｃｅｌｌ ｄｅｒｉｖｅｄｉｎｄｕｃｉｂｅｆａｃｔｏｒ,ＩＬ ＴＩＦ)。比利时Ｌｕｄｗｉｇ癌…     

Morphology of echovirus 22

Purified preparations of echovirus 22 were examined in the electron microscope. The virus was found to possess 32 capsomers arranged at the vertices of either a pentakis dodecahedron or a rhombic triacontahedron. The size of the virions ranges from 22 × 10⁻³ to 32 × 10⁻³ μm with a mean of 27 × 10⁻³ μm and a mode of 28 × 10⁻³ μm.     

"PCR Karyotype" of Monochromosomal Somatic Cell Hybrids

Following fusion of human diploid fibroblast-derived microcells with mouse A9 cells, we isolated seven monochromosomal hybrids containing a single human chromosome 2, 3, 5, 12, 15, 20, or 22. Cytogenetic analysis as well as PCR karyotyping (chromosome-specific banding pattern generated by Alu-PCR) was performed on all the hybrids. We here present, for the first time, the specific PCR karyotypes of human chromosomes 2 and 20.     

Incomplete trisomy 22

Summary Two brothers with duplication of the distal segment of 22q inherited from a t(6;22)(q27;13) translocation carrier mother presented with intraurine growth retardation, congenital hydrocephalus, cleft palate, genital hypoplasia with cryptorchidism and hypospadias, and similar facial features including mongoloid position of eyeaxes, hypertelorism, small nose with prominent bridge, prominent upper lip, and small mandible. In addition the second sib revealed renal hypoplasia, arrhinencephaly and pentalogy of Fallot. The patients died at ages eight days and one day, respectively. The two brothers appear to be the first instances of familial trisomy 22q13qter.     

Trisomy 22.

The existence of a trisomy 22 has been definitely established by newer methods of karyotype analysis which permit distinction between the acrocentric chromosomes of group G. Trisomy 22 is much rarer than trisomy 21. This report presents presumptive evidence that the cat eye syndrome (CES), the so-called "trisomy 22" (T22), the intermediate cases (IM) with cardinal symptoms of CES and T22, and some cases of mental retardation with rather unspecific symptoms are variants of the same disease entity. For T22, CES and one abortive case the extra chromosome was clearly identified as number 22 chromosome with or without partial deletion of the long arm. An interesting and presently not fully understood feature of trisomy 22 is its frequent familial incidence.