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51.
52.
Human Y chromosome azoospermia factors (AZF) mapped to different subregions in Yq11 总被引:56,自引:0,他引:56
Vogt PH; Edelmann A; Kirsch S; Henegariu O; Hirschmann P; Kiesewetter F; Kohn FM; Schill WB; Farah S; Ramos C; Hartmann M; Hartschuh W; Meschede D; Behre HM; Castel A; Nieschlag E; Weidner W; Grone HJ; Jung A; Engel W; Haidl G 《Human molecular genetics》1996,5(7):933-943
In a large collaborative screening project, 370 men with idiopathic
azoospermia or severe oligozoospermia were analysed for deletions of 76 DNA
loci in Yq11. In 12 individuals, we observed de novo microdeletions
involving several DNA loci, while an additional patient had an inherited
deletion. They were mapped to three different subregions in Yq11. One
subregion coincides to the AZF region defined recently in distal Yq11. The
second and third subregion were mapped proximal to it, in proximal and
middle Yq11, respectively. The different deletions observed were not
overlapping but the extension of the deleted Y DNA in each subregion was
similar in each patient analysed. In testis tissue sections, disruption of
spermatogenesis was shown to be at the same phase when the microdeletion
occurred in the same Yq11 subregion but at a different phase when the
microdeletion occurred in a different Yq11 subregion. Therefore, we propose
the presence of not one but three spermatogenesis loci in Yq11 and that
each locus is active during a different phase of male germ cell
development. As the most severe phenotype after deletion of each locus is
azoospermia, we designated them as: AZFa, AZFb and AZFc. Their probable
phase of function in human spermatogenesis and candidate genes involved
will be discussed.
相似文献
53.
FM Puca M de Tommaso P Tota V Sciruicchio 《Cephalalgia : an international journal of headache》1996,16(4):246-250
Fifty-eight migraineurs were. studied by intermediate frequency steady-state visual evoked potentials (SSVEPs) during headache-free periods. Sex, age, age of onset of migraine, duration of illness, type of migraine, side of pain, sleep .wake disorders, and frequency of migraine attacks did not correlate with any SSVEP abnormalities. On the other hand, visual responsiveness was significantly increased in subjects with family history of migraine, and in those with autonomic symptoms. Our results may indicate that a genetic predisposition to migraine underlies the observed abnormal visual response in migraineurs. 相似文献
54.
Nonpalpable breast lesions: recommendations for biopsy based on suspicion of carcinoma at mammography 总被引:12,自引:0,他引:12
Carcinoma was found in 30% (119 of 400) of biopsy specimens obtained for mammographically suspicious but nonpalpable findings. The authors reviewed the mammograms of these 400 cases without knowledge of the biopsy results and placed each examination into one of four groups based on their suspicion for carcinoma: minimal (n = 82), slight (n = 91), moderate (n = 174), and high (n = 53). In 127 cases, mammograms showed either minimally suspicious calcifications (n = 33) or minimally (n = 49) or slightly (n = 45) suspicious masses. A 4.7% (six of 127) rate of carcinoma was found in these groups; five of the six cancers were in situ. Had follow-up mammography been done rather than biopsy for these 127 less suspicious lesions, it is probable that the delay in diagnosis would not have altered overall prognosis. In the remaining 273 patients, the positive predictive value of mammography for carcinoma would have risen from 30% (119 of 400) to 41% (113 of 273). The authors conclude that in the management of suspicious nonpalpable mammographic findings, the rate of carcinoma for lesions at biopsy can approximate 40%. This is almost double the rate of most published series. 相似文献
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58.
L Gabriele F Moretti MA Pierotti FM Marincola R Foà FM Belardelli 《Journal of translational medicine》2006,4(1):1-5
Purpose
Based on previous studies that demonstrated the safety profile and preliminary clinical activity of prostate specific antigen (PSA) targeted therapeutic vaccines, as well as recent laboratory data supporting the value of the addition of co-stimulatory molecules B7-1, ICAM-1, and LFA-3 (designated TRICOM?) to these vaccines, we conducted a Phase I study to evaluate the safety and immunogenicity of a novel vaccinia and fowlpox vaccine incorporating the PSA gene sequence and TRICOM.Methods
In this study, ten patients with androgen independent prostate cancer with or without metastatic disease were enrolled. Patients were treated with 2 × l08 pfu of a recombinant vaccinia virus vaccine (PROSTVAC-V) followed by 1 × 109 pfu of the booster recombinant fowlpox virus (PROSTVAC-F) both with gene sequences for PSA and TRICOM. The mean age of patients enrolled in the study was 70 (range 63 to 79). The mean PSA at baseline was 434 (range 9 – 1424).Results
There were no deaths, and no Grade 3 or 4 adverse events. The most commonly reported adverse events, regardless of causality, were injection site reactions and fatigue. One serious adverse event (SAE) occurred that was unrelated to vaccine; this patient developed progressive disease with a new sphenoid metastasis. PSA was measured at week 4 and week 8. Four patients had stable disease (with less than 25% increase in PSA) through the week 8 study period. Anti-PSA antibodies were not induced with therapy: however, anti-vaccinia titers increased in all patients.Conclusion
This study demonstrated that vaccination with PROSTVAC-V and PROSTVAC-F combined with TRICOM is well-tolerated and generated an immune response to vaccinia. Therefore, PROSTVAC-VF/TRICOM represents a feasible therapeutic approach for further phase II and III study in patients with prostate cancer. 相似文献59.
Objectives
To analyze the concept of “case series” in the medical literature compared with case reports.Methods
A PubMed search for articles published during 2009 which had “case series” in their title was performed. A total number of 621 articles were retrieved. 586 papers were included in the analysis and 35 were excluded (18 were commentary letters, 5 were not in English, and twelve could not be retrieved by our Library). The number of patients and category of these articles were analyzed.Results
The median (range) of the number of cases of articles having “case series” in their title was 7 (1–6432) cases. 186/ 586 articles had less than 5 cases (31.7%, 95% CI (28.3–35.1%)). The median (range) of the number of cases of articles having “case report” as their publication type was 4 (1–178) cases. Out of the 219 articles categorized as case reports 114 (52.1%, 95% CI (45.6–58.6%)) had less than five cases.Conclusions
The concept of “case series” is not well defined in the literature and does not reflect a specific research design. We suggest that a case series should have more than four patients while four paitents or less should be reported individually as case reports. 相似文献60.
目的:用HPLC和电荷转移络合UV法分别测定特非那丁粒剂的含量,并对测定结果进行比较,方法:HPLC法,色谱柱:SpherisorbC8(150*4.6mm,5μm);流动相:甲醇-0.1mol/L三乙胺磷酸缓冲液(80:20),检测波长235nm。电荷转移络合UV法,利用碘与TFN在氯仿中形成电荷转移络合物的原理,在紫外294nm的波长处测定TFN的含量。结果:两法测定的线性范围和平均回收率分别 相似文献