OBJECTIVE: To explore the correlation between microRNA (miRNA) differential expression and quality of embryo. METHODS: The miRNA expression profiles of 8 blastocysts were detected by a TaqMan microRNA array, and miRNAs with a stable expression were selected. Additional blastocysts were selected, and the candidate miRNA was detected by real-time PCR. Meanwhile, chromosomal abnormalities of the embryos were detected by using next-generation sequencing, and the results were compared. RESULTS: The expression of mir-720, mir-372, mir-886-3p and mir-512-3p was higher than that of miR-145, which suggested that mir-720, mir-372, mir-886-3p and mir-512-3p are related to early embryo development. The expression of miR-145 and mir-886-3p were significantly lower in the normal chromosome group. With the threshold values of above 9 and 3 for the relative expression of miR-145 and mir-886-3p, respectively, there was no embryo without a chromosomal abnormality. CONCLUSION There is a correlation between the expression level of specific miRNA and chromosomal abnormalities of embryos, which may be used as a novel biomarker for embryo selection.

Dry age-related macular degeneration(AMD)is a degenerative disease affecting the macular region of the retina,and aging changes in retinal and choroidal tissues are an important factor in AMD pathogenesis.Cell aging is an irre-versible state of cell cycle arrest triggered by certain physiological processes or stressful injury,affecting a variety of physi-ological and pathological processes.An increasing number of studies have shown that cell aging plays an essential role in the occurrence and development of AMD.This paper reviews the mechanisms of cell aging and its relationship with dry AMD,aiming to provide new ideas for the treatment of dry AMD.

Through systematic review of literature, Delphi expert consultation and expert discussion meeting, the Nursing expert consensus on application of cardiopulmonary resuscitation machine in treating patients with in- hospital cardiac arrest was formulated. Finally, 8 parts of the application specifications including evaluation before boarding, cooperation during boarding, detection and management after boarding, cooperation during weaning, quality control and training, and fault handling were formed, in order to provide guidance and reference for the application of cardiopulmonary resuscitation machine in treating patients with in-hospital cardiac arrest.

The penetrating moxibustion technique is proposed based on experience of the ancients and clinical practice for many years. From the aspects of definition, action characteristics and technique at different parts, the advantage and application experience of penetrating moxibustion have been discussed. The adequate dose of moxibustion is necessary in penetrating moxibustion; in addition, moxibustion sensation should be penetrating; therefore, with a temperature of 43℃ for more than 20 min, sweating, flushing, speckle appearing after penetrating moxibustion. Due to individual differences of age, gender and constitution factors, the effects of penetrating moxibustion are different, in clinical practice the body reaction and patient's feelings should be deliberately focused on other than does or sore and blister of moxibustion. The technique is common used in the abdomen, waist and knee joint, etc.

OBJECTIVETo explore the incidence of chromosome 1 abnormality in myelodysplastic syndrome（MDS）to couple its association with clinical presentation and prognosis.

METHODSR- band karyotype analyses were performed in 672 cases of MDS between 2010 and 2013. Clinical data of those with abnormal chromosome l were collected and then analyzed factors affecting the prognosis.

RESULTSOf 672 cases of patients with MDS, chromosome 1 aberration［der（1）, dup（1）, －1 were most frequent］ were found in 41（6.1%）cases. 1q trisomy was found in 18/41（43.9%）cases, and the most common patterns were duplication of the long arm as well as unbalanced translocation with other chromosomes. Of 41 patients with chromosomal 1 abnormality, 32 cases were accompanied with other chromosomal aberration, usually involving 3 or more abnormal chromosomal karyotypes, e.g., chromosome 8, 7 abnormalities. According to IPSS-R scoring system, 19 patients were diagnosed with very high risk, 10 patients high risk, 10 patients intermediate risk and 2 patients low risk MDS. 9 patients transformed into acute leukemia with median transforming time of 7.18（0.56-54.28）months. Median survival of 36 cases after 2010 was 17.48（95% CI 14.38-20.58）months. There were significant differences on median survival between RAEB and non-RAEB groups（χ²=10.398, P=0.001）, and between with more than 3 chromosome abnormalities and with less than 3 groups（χ²=3.939, P=0.047）. RAEB was identified as an independent risk factor for the prognosis of MDS with chromosome 1 abnormality.

CONCLUSIONChromosome 1 aberration was not rare in MDS. 1q trisomy was the most common abnormal karyotype in China, which often accompanied with other chromosomal abnormalities. The prognosis of MDS patients with chromosome 1 abnormality was poor, especially worse in those diagnosed with RAEB-1, RAEB-2 and with more than 3 chromosome abnormality. For patients whose percentage of bone marrow blasts less than 5%, the prognosis of patients with 1q trisomy was better than those without 1q trisomy. RAEB was identified as an independent risk factor for the prognosis of MDS with chromosome 1 abnormality.

Abnormal Karyotype ; Acute Disease ; Anemia, Refractory, with Excess of Blasts ; Bone Marrow ; China ; Chromosome Aberrations ; Chromosome Banding ; Chromosomes, Human, Pair 1 ; genetics ; Humans ; Karyotyping ; Leukemia ; diagnosis ; genetics ; Myelodysplastic Syndromes ; diagnosis ; genetics ; Prognosis ; Risk Factors ; Trisomy