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Ghosh D; Stewart DR; Nayak NR; Lasley BL; Overstreet JW; Hendrickx AG; Sengupta J 《Human reproduction (Oxford, England)》1997,12(5):914-920
The present study was undertaken to assess the temporal association between
the profiles of serum concentrations of oestradiol-17beta, progesterone,
chorionic gonadotrophin (CG) and relaxin in pregnancies established
naturally, and after embryo transfer, as well as in failed pregnancies in
rhesus monkeys. In naturally mated cycles (group 1) a conception rate of
75% was obtained. In group 1, the mean day of CG detection in serum was
11.5 +/- 1.9 day post-ovulation, and for relaxin, 9.0 +/- 2.5 day
post-ovulation. In group 2, embryo transfer to synchronous, non-mated
surrogate recipients was performed; seven embryo transfer cycles yielded
three pregnancies which were allowed to continue to term and normal infants
were delivered. In embryo transfer cycles the mean day of CG detection was
14.8 +/- 1.8 day post- ovulation, and for relaxin, 11.4 +/- 2.6 day
post-ovulation. A delay of about 3 days was observed in the appearance in
circulation of CG (P < 0.05) and also of relaxin (P < 0.05) between
natural mated and embryo transfer conception cycles. Significant
differences (P < 0.05 for progesterone and P < 0.03 for oestradiol)
were obtained for the areas under the curves for progesterone and
oestradiol between days 12 and 16 in conception cycles compared with failed
pregnancies. These data provide the first observation of the normal
hormonal signals associated with maternal recognition of transferred
embryos during the peri- implantation period, and suggest that the use of
such an experimental primate embryo transfer model may help to elucidate
components of maternal and embryonic signal-response mechanisms during
embryo implantation.
相似文献
4.
The role of size, sequence and haplotype in the stability of FRAXA and FRAXE alleles during transmission 总被引:2,自引:5,他引:2
Murray A; Macpherson JN; Pound MC; Sharrock A; Youings SA; Dennis NR; McKechnie N; Linehan P; Morton NE; Jacobs PA 《Human molecular genetics》1997,6(2):173-184
Factors involved in the stability of trinucleotide repeats during
transmission were studied in 139 families in which a full mutation,
premutation or intermediate allele at either FRAXA or FRAXE was
segregating. The transmission of alleles at FRAXA, FRAXE and four
microsatellite loci were recorded for all individuals. Instability within
the minimal and common ranges (0-40 repeats for FRAXA, 0-30 repeats for
FRAXE) was extremely rare; only one example was observed, an increased in
size at FRAXA from 29 to 39 repeats. Four FRAXA and three FRAXE alleles in
the intermediate range (41-60) repeats for FRAXA, 31-60 for FRAXE) were
unstably transmitted. Instability was more frequent for FRAXA intermediate
alleles that had a tract of pure CGG greater than 37 although instability
only occurred in two of 13 such transmissions: the changes observed were
limited to only one or two repeats. Premutation FRAXA alleles over 100
repeats expanded to a full mutation during female transmission in 100% of
cases, in agreement with other published series. There was no clear
correlation between haplotype and probability of expansion of FRAXA
premutations. Instability at FRAXA or FRAXE was more often observed in
conjunction with a second instability at an independent locus suggesting
genomic instability as a possible mechanism by which at least some FRAXA
and FRAXE mutations arise.
相似文献
5.
S-A Ivarsson D Bergqvist NR Lundström E Maly KO Nilsson C Wattsgård 《Acta paediatrica (Oslo, Norway : 1992)》1992,81(12):1044-1048
We report a case of Takayasu's disease with severe renovascular hypertension in a girl from Eritrea. In the "burn-out" phase after the erythrocyte sedimentation rate had normalized, reconstructive vascular surgery was performed as further progression of the disease seemed unlikely. However, probably due to her growth, the graft rotated and a second operation was successfully performed. 相似文献
6.
JJ Rangasami DC Greenwood B McSporran PJ Smail CC Patterson NR Waugh 《Archives of disease in childhood》1997,77(3):210-213
OBJECTIVES: To calculate the incidence of type 1 diabetes in Scottish children aged less than 15 years between 1984 and 1993; to examine changes in incidence; and to calculate the prevalence of diabetes at the end of this period. DESIGN: Three data sources were used to construct the Scottish Study Group for the Care of Young Diabetics register: active reporting of all new cases; reports from the Scottish Morbidity Register 1; and local registers. SUBJECTS: All children resident in Scotland diagnosed with primary insulin dependent diabetes mellitus when less than 15 years of age between 1984 and 1993. MAIN OUTCOME MEASURES: Annual incidence and prevalence rate for Scotland; time trend in incidence over the 10 years; differences in incidence between the three different age groups; and completeness of the register. RESULTS: The average annual incidence for Scotland was 23.9/100,000 children. The prevalence rate was 1.5/1000 in 1993. A total of 2326 cases was identified from the three sources. Capture-recapture analysis suggests a case ascertainment of 98.6%. The annual incidence rates increased at a rate of 2% each year (rate ratio = 1.02, 95% confidence interval (CI) 1.01 to 1.03). The incidence was higher in boys than girls (rate ratio = 1.08, 95% CI 1.00 to 1.18), and the incidence rates increased with age: 15.3/100,000/year for age 0-4 years, 24.4/ 100,000/year for age 5-9 years, and 31.9/ 100,000/year for age 10-14 years. CONCLUSIONS: The incidence of type 1 diabetes in Scotland is increasing and the prevalence is relatively high. These findings have important implications for health service resource allocation. The Scottish Study Group for the Care of Young Diabetics' register provides a base for monitoring and research. 相似文献
7.
Inpatient dependency in activities of daily living predicts informal caregiver strain: A cross‐sectional study
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8.
Nienke R Biermasz Alberto M Pereira Jan W A Smit Johannes A Romijn Ferdinand Roelfsema 《Growth hormone & IGF research》2005,15(3):200-206
OBJECTIVE: Depot formulations of somatostatin analogues are increasingly used in the treatment of active acromegaly. A priori knowledge of the efficacy of these drugs in controlling GH excess is clinically relevant, because only approximately 60% of the patients respond with adequate control of GH (GH levels < 5 mU/L) and/or IGF-1 levels upon this treatment. Therefore, we assessed the acute responses of serum GH levels to a new octreotide test (intravenous administration of 50 microg) in 98 consecutive patients with active acromegaly and we measured the predictive value of this test for the efficacy of chronic octreotide-long acting repeatable (octreotide-LAR) treatment in 18 patients. DESIGN: Serum GH concentrations were measured before and at 20, 30, 45, 60, 90, 120, 150 and 180 min following 50 microg i.v. octreotide. The minimal achieved GH was used for analysis. Octreotide-LAR was individually titrated aiming at a normal serum IGF-I for age and a serum GH < 5 mU/L. The mean of 3-6 monthly serum GH and IGF-I measurements after individual dose adjustment was used for evaluating the efficacy of chronic therapy. RESULTS: Octreotide decreased GH levels to values below 5 mU/L in only 49% of unselected consecutive patients and the response was inversely related to basal GH levels. In patients with baseline GH above 50 mU/L, 50 microg i.v. octreotide reduced GH to < 5 mU/L in only 15% of cases (n = 41), whereas in patients with baseline GH levels below 50 mU/L this goal was achieved in 77% of cases. The fractional decrease in GH levels upon octreotide injection was similar in microadenomas and macroadenomas. The minimally achieved serum GH concentration during the intravenous octreotide test was a good predictor for the GH concentrations during long-term octreotide-LAR treatment as assessed in 18 patients. The intravenous octreotide test, using a minimal GH level of < 5 mU/L, had a sensitivity, positive and negative predictive value of 100% for prediction of GH suppression to below 5 mU/L during long term octreotide-LAR treatment. For predicting the response of IGF-I during long-term treatment, the test performed with a sensitivity of 73% and a positive predictive value of 73%. CONCLUSION: Intravenous octreotide reduces GH to concentrations < 5 mU/L in approximately 50% of consecutive patients with active acromegaly, which predicts a good response to chronic octreotide-LAR treatment. 相似文献
9.
van der Meulen Merel Verstegen Marco J. T. Lobatto Daniel J. Kleijwegt Maarten C. Pereira Alberto M. Biermasz Nienke R. van Furth Wouter R. Zamanipoor Najafabadi Amir H. 《Pituitary》2022,25(2):308-320
Pituitary - Endoscopic transsphenoidal surgery causes nasal morbidity and negatively affects health-related quality of life (HRQoL). Knowledge on actionable symptoms that could improve... 相似文献
10.
Roelfsema F Biermasz NR Veldman RG Veldhuis JD Frölich M Stokvis-Brantsma WH Wit JM 《The Journal of clinical endocrinology and metabolism》2001,86(6):2459-2464
GH secretion is regulated by the interaction of GHRH and somatostatin and is released in 10-20 pulses in each 24-h cycle. The exact roles in pulse generation played by somatostatin, GHRH, and the recently isolated GH-releasing peptide, Ghrelin, are not fully elucidated. To investigate the GHRH-mediated GH secretion in human, we investigated pulsatile, entropic, and 24-h rhythmic GH secretion in two young adults (male, 24 yr; female, 23 yr) from a Moroccan family with a novel inactivating defect of the GHRH receptor gene. Data were compared with values in age- and gender-matched controls. Plasma GH concentration were measured by a sensitive immunofluorometric assay, with a detection limit of 0.01 mU/L. All plasma GH concentrations in the female patient were measurable; in the male patient 30 of 145 samples were at or below the detection limit. GH secretion was pulsatile, with 21 and 23 secretory episodes/24 h in the male and female patients, respectively. The fraction of basal to total GH secretion was raised in both patients by 0.18 and 0.15, respectively. The total 24-h GH production rate was greatly diminished; in the male patient it was 6.9 mU/L (normal values for his age, 26--63 mU/L), and in the female patient it was 4.2 mU/L (normal values for her age, 96--390 mU/L). The nyctohemeral plasma GH rhythm was preserved (P < 0.001), with normal acrophases (0430 and 0218 h in the male and female, respectively). Approximate entropy was greatly elevated in both subjects (0.82 in the male and 1.17 in the female; upper normal values for age and gender, 0.24 and 0.59, respectively). Intravenous injection of 50 microg GHRH failed to increase the plasma GH concentration in both patients, but 100 microg GH-releasing peptide-2 elicited a definite increase (male patient, 0.13 to 1.74 mU/L; female patient, 0.29 to 0.87 mU/L). Both patients had a partial empty sella on magnetic resonance imaging scanning. In summary, the present studies in two patients with a profound loss of function mutation of the GHRH receptor favor the view that in the human the timing of GH pulses is primarily supervised by intermittent somatostatin withdrawal, and the amplitude of GH pulses is driven by GHRH. In addition, we infer that effectual GHRH input controls the GH cell mass and the orderliness of the secretory process. 相似文献