Catalogue Search | MBRL
Search Results Heading
Explore the vast range of titles available.
MBRLSearchResults
-
DisciplineDiscipline
-
Is Peer ReviewedIs Peer Reviewed
-
Item TypeItem Type
-
SubjectSubject
-
YearFrom:-To:
-
More FiltersMore FiltersSourceLanguage
Done
Filters
Reset
12
result(s) for
"Di Segni, C."
Sort by:
Estrogens as Antioxidant Modulators in Human Fertility
2013
Among treatments proposed for idiopathic male infertility, antiestrogens, like tamoxifen, play a possible role. On the other hand, oxidative stress is a mechanism well recognized for deleterious effects on spermatozoa function. After reviewing the literature on the effects of estrogens in modulation of antioxidant systems, in both sexes, and in different in vivo and in vitro models, we suggest, also on the basis of personal data, that a tamoxifen treatment could be active via an increase in seminal antioxidants.
Journal Article
Thyroid Hormones, Oxidative Stress, and Inflammation
by
Di Segni, C.
,
Silvestrini, Andrea
,
Meucci, Elisabetta
in
Animals
,
Antioxidants
,
Colleges & universities
2016
Inflammation and oxidative stress (OS) are closely related processes, as well exemplified in obesity and cardiovascular diseases. OS is also related to hormonal derangement in a reciprocal way. Among the various hormonal influences that operate on the antioxidant balance, thyroid hormones play particularly important roles, since both hyperthyroidism and hypothyroidism have been shown to be associated with OS in animals and humans. In this context, the nonthyroidal illness syndrome (NTIS) that typically manifests as reduced conversion of thyroxine (T4) to triiodothyronine (T3) in different acute and chronic systemic conditions is still a debated topic. The pathophysiological mechanisms of this syndrome are reviewed, together with the roles of deiodinases, the enzymes responsible for the conversion of T4 to T3, in both physiological and pathological situations. The presence of OS indexes in NTIS supports the hypothesis that it represents a condition of hypothyroidism at the tissue level and not only an adaptive mechanism to diseases.
Journal Article
Multiple hormonal and metabolic deficiency syndrome in chronic heart failure: rationale, design, and demographic characteristics of the T.O.S.CA. Registry
by
Masarone, D
,
Ballotta, A
,
Monti, M G
in
Cardiovascular diseases
,
Clinical trials
,
Dehydroepiandrosterone
2018
Recent evidence supports the concept that progression of chronic heart failure (CHF) depends upon an imbalance of catabolic forces over the anabolic drive. In this regard, multiple hormonal deficiency syndrome (MHDS) significantly has impacts upon CHF progression, and is associated with a worse clinical status and increased mortality. The T.O.S.CA. (Trattamento Ormonale nello Scompenso CArdiaco; Hormone Therapy in Heart Failure) Registry (clinicaltrial.gov = NCT02335801) tests the hypothesis that anabolic deficiencies reduce survival in a large population of mild-to-moderate CHF patients. The T.O.S.CA. Registry is a prospective multicenter observational study coordinated by “Federico II” University of Naples, and involves 19 centers situated throughout Italy. Thyroid hormones, insulin-like growth factor-1, total testosterone, dehydroepiandrosterone , and insulin are measured at baseline and every year for a patient-average follow-up of 3 years. Subjects with CHF are divided into two groups: patients with one or no anabolic deficiency, and patients with two or more anabolic deficiencies at baseline. The primary endpoint is the composite of all-cause mortality and cardiovascular hospitalization. Secondary endpoints include the composite of all-cause mortality and hospitalization, the composite of cardiovascular mortality and cardiovascular hospitalization, and change of VO2 peak. Patient enrollment started in April 2013, and was completed in July 2017. Demographics and main clinical characteristics of enrolled patients are provided in this article. Detailed cross-sectional results will be available in late 2018. The T.O.S.CA. Registry represents the most robust prospective observational trial on MHDS in the field of CHF. The study findings will advance our knowledge with regard to the intimate mechanisms of CHF progression and hopefully pave the way for future randomized clinical trials of single or multiple hormonal replacement therapies in CHF.
Journal Article
The dynamic N(1)-methyladenosine methylome in eukaryotic messenger RNA
by
Nachtergaele, Sigrid
,
Kol, Nitzan
,
Hershkovitz, Vera
in
5' Untranslated Regions - genetics
,
Adenosine - analogs & derivatives
,
Adenosine - metabolism
2016
Gene expression can be regulated post-transcriptionally through dynamic and reversible RNA modifications. A recent noteworthy example is N(6)-methyladenosine (m(6)A), which affects messenger RNA (mRNA) localization, stability, translation and splicing. Here we report on a new mRNA modification, N(1)-methyladenosine (m(1)A), that occurs on thousands of different gene transcripts in eukaryotic cells, from yeast to mammals, at an estimated average transcript stoichiometry of 20% in humans. Employing newly developed sequencing approaches, we show that m(1)A is enriched around the start codon upstream of the first splice site: it preferentially decorates more structured regions around canonical and alternative translation initiation sites, is dynamic in response to physiological conditions, and correlates positively with protein production. These unique features are highly conserved in mouse and human cells, strongly indicating a functional role for m(1)A in promoting translation of methylated mRNA.
Journal Article
Did the effect of placebo increase in rcts of panic disorder across the years?
2021
IntroductionThe curious effect of an increase of the placebo effect across year of publication has been shown for depression, schizophrenia, obsessive-compulsive disorder, as well as for some medical conditions like hypertension and pain.ObjectivesWe aimed to observe how randomised clinical trials with a placebo control behave at this respect in panic disorder trials.MethodsWe searched the PubMed database using the strategy: (panic disorder OR panic attack disorder) AND placebo, which on 3 November 2020 produced 779 records. Inclusion criteria were the above stated, excluded were all studies focusing on the same patients as others and those not providing intelligible data. In our selection we used the PRISMA statement and reached agreement with Delphi rounds.ResultsWe identified through other sources further 3 studies. The finally eligible studies were 82, excluded were 700 studies, mainly consisting of reviews (176), challenge studies (173), not dealing with panic disorder (67), studies with unsuitable designs to detect placebo effect (53), studies using same populations as others (36), those with misfocused outcomes (57), those lumping diagnoses and not allowing to separate data for panic disorder (22), and those not using placebo at all (21). Mean response to placebo in included panic disorder studies was 36.01±19.812, ranging from 0 to 76.19%; the correlation with year of publication was positive and significant (Pearson’s r= 0.246; p=0.026).ConclusionsThe effect of placebo in randomised control trials has increased across the years, but this field of research appears to be idle in recent years.DisclosureNo significant relationships.
Journal Article
The dynamic N1-methyladenosine methylome in eukaryotic messenger RNA
by
Nachtergaele, Sigrid
,
Kol, Nitzan
,
Hershkovitz, Vera
in
631/337/1645/2570
,
631/337/176
,
631/92/500
2016
Gene expression can be regulated post-transcriptionally through dynamic and reversible RNA modifications. A recent noteworthy example is
N
6
-methyladenosine (m
6
A), which affects messenger RNA (mRNA) localization, stability, translation and splicing. Here we report on a new mRNA modification,
N
1
-methyladenosine (m
1
A), that occurs on thousands of different gene transcripts in eukaryotic cells, from yeast to mammals, at an estimated average transcript stoichiometry of 20% in humans. Employing newly developed sequencing approaches, we show that m
1
A is enriched around the start codon upstream of the first splice site: it preferentially decorates more structured regions around canonical and alternative translation initiation sites, is dynamic in response to physiological conditions, and correlates positively with protein production. These unique features are highly conserved in mouse and human cells, strongly indicating a functional role for m
1
A in promoting translation of methylated mRNA.
Here the m
1
A modification is discovered in messenger RNA and mapped at the transcriptome-wide level; the modification is conserved, dynamic, accumulates in structured regions around translation initiation sites upstream of the first splice site, and correlates with higher protein expression.
The m
1
A RNA modification
The
N
6
-methyladenosine (m
6
A) modification of RNA has been subject to intensive examination since it was recognized to be widespread throughout the transcriptome. In a new study by Chuan He and colleagues, the significance of a different messenger RNA modification,
N
1
-methyladenosine (m
1
A), is probed on the transcriptome-wide level. Although the modification is dynamic, they find it accumulates in structured regions surrounding both canonical and alternative translation initiation sites, and its presence correlates with higher protein expression.
Journal Article
Identification of genes required for eye development by high-throughput screening of mouse knockouts
by
Udensi, Uchechukwu
,
Seavitt, John R.
,
Brown, Steve D. M.
in
631/1647/2163
,
631/208/191/1908
,
692/420/2489/144
2018
Despite advances in next generation sequencing technologies, determining the genetic basis of ocular disease remains a major challenge due to the limited access and prohibitive cost of human forward genetics. Thus, less than 4,000 genes currently have available phenotype information for any organ system. Here we report the ophthalmic findings from the International Mouse Phenotyping Consortium, a large-scale functional genetic screen with the goal of generating and phenotyping a null mutant for every mouse gene. Of 4364 genes evaluated, 347 were identified to influence ocular phenotypes, 75% of which are entirely novel in ocular pathology. This discovery greatly increases the current number of genes known to contribute to ophthalmic disease, and it is likely that many of the genes will subsequently prove to be important in human ocular development and disease.
Bret Moore et al. from the International Mouse Phenotyping Consortium report the identification of 347 mouse genes that influence ocular phenotypes when knocked out. 75% of the identified genes have not previously been associated with any ocular pathology.
Journal Article
The dynamic N.sub.1-methyladenosine methylome in eukaryotic messenger RNA
by
Nachtergaele, Sigrid
,
Kol, Nitzan
,
Hershkovitz, Vera
in
Genetic transcription
,
Messenger RNA
,
Physiological aspects
2016
Gene expression can be regulated post-transcriptionally through dynamic and reversible RNA modifications. A recent noteworthy example is [N.sup.6]-methyladenosine ([m.sup.6]A), which affects messenger RNA (mRNA) localization, stability, translation and splicing. Here we report on a new mRNA modification, [N.sup.1]-methyladenosine ([m.sup.1]A), that occurs on thousands of different gene transcripts in eukaryotic cells, from yeast to mammals, at an estimated average transcript stoichiometry of 20% in humans. Employing newly developed sequencing approaches, we show that [m.sup.1]A is enriched around the start codon upstream of the first splice site: it preferentially decorates more structured regions around canonical and alternative translation initiation sites, is dynamic in response to physiological conditions, and correlates positively with protein production. These unique features are highly conserved in mouse and human cells, strongly indicating a functional role for [m.sup.1]A in promoting translation of methylated mRNA.
Journal Article
The dynamic N^sup 1^-methyladenosine methylome in eukaryotic messenger RNA
by
Nachtergaele, Sigrid
,
Kol, Nitzan
,
Hershkovitz, Vera
in
Eukaryotes
,
Gene expression
,
Metabolism
2016
Gene expression can be regulated post-transcriptionally through dynamic and reversible RNA modifications. A recent noteworthy example is N^sup 6^-methyladenosine (m^sup 6^A), which affects messenger RNA (mRNA) localization, stability, translation and splicing. Here we report on a new mRNA modification, N^sup 1^-methyladenosine (m^sup 1^A), that occurs on thousands of different gene transcripts in eukaryotic cells, from yeast to mammals, at an estimated average transcript stoichiometry of 20% in humans. Employing newly developed sequencing approaches, we show that m^sup 1^A is enriched around the start codon upstream of the first splice site: it preferentially decorates more structured regions around canonical and alternative translation initiation sites, is dynamic in response to physiological conditions, and correlates positively with protein production. These unique features are highly conserved in mouse and human cells, strongly indicating a functional role for m1A in promoting translation of methylated mRNA.
Journal Article
Author Correction: Identification of genes required for eye development by high-throughput screening of mouse knockouts
by
Udensi, Uchechukwu
,
Seavitt, John R.
,
Brown, Steve D. M.
in
631/1647/2163
,
631/208/191/1908
,
692/420/2489/144
2019
In the original published version of the article, Valerie Vancollie was mistakenly omitted from the list of members of the International Mouse Phenotyping Consortium. In addition, recognition of funding from Wellcome Trust grant WT098051 was mistakenly omitted from the Acknowledgements.The errors have been corrected in both the PDF and HTML versions of the paper.
Journal Article