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PubMed1977

Purification and properties of a T4 bacteriophage factor that modifies valyl-tRNA synthetase of Escherichia coli.

After T4 bacteriophage infects Escherichia coli, a peptide tau, produced under the control of a phage gene, binds to the host valyl transfer ribonucleic acid synthetase (EC 6.1.1.9) and thereby changes several of its physicochemical properties. The interaction of tau with the host enzyme was investigated in vitro after extensively purifying the factor from T4-infected E. coli using a rapid purification procedure. The tau preparation migrated as a single, protein-staining band with a molecular weight of 11,000 during sodium dodecyl sulfate-gel electrophoresis. The purified peptide completely converted partially purified valyl-tRNA synthetase from uninfected E. coli into the form present in cell-free extracts prepared from virus-infected bacteria. The enzyme modified in vitro also exhibited the enhanced affinity for tRNA characteristic of the viral form of valyl-tRNA synthetase. The addition of bulk tRNA from E. coli B, tRNAVal, or tRNA1Val to enzyme modified in vitro increased its sedimentation rate to that of enzyme prepared from phage-infected cells. Amino acid analysis of the purified tau peptide revealed a relatively high concentration of the amino acids lysine and alanine, and a lack of detectable proline, tyrosine, phenylalanine, and methionine.

Amino Acids↗
PubMed1979

Immunologic studies of native and modified human factor VIII/von Willebrand factor.

Factor VIII/von Willebrand factor (FVIII/vWF) is a glycoprotein with a molecular weight greater than one-million daltons. Two activities are associated with this large molecule: FVIII procoagulant activity and vWF activity. Incubation of FVIII/vWF with proteolytic enzymes causes rapid inactivation of the FVIII procoagulant activity but has little effect on the vWF activity or antigenicity. In an attempt to gain insight into the structural features required for these two activities, antisera were raised in rabbits to normal, thrombin-inactivated, and plasmin-inactivated FVIII/vWF. All of these proteolytically modified forms of FVIII/vWF cross-reacted with each of the rabbit antisera; each blocked the ability of a human inhibitor to inactivate native active FVIII/vWF. Each of the antisera was a potent inhibitor of vWF activity and inactivated vWF activity at the same titer. The antisera were much less potent inhibitors of FVIII activity than of vWF activity. Antibodies to thrombin-inactivated FVIII/vWF or normal FVIII/vWF had about the same ability to inactivate FVIII procoagulant activity. Surprisingly, those to plasmin-inactivated FVIII/vWF still retained about 50% of this inhibitory capacity. A comparison of the three types of antigens by polyacrylamide gel electrophoresis in sodium dodecyl sulfate-6 M urea demonstrated that the structure of thrombin-inactivated FVIII/vWF was indistinguishable from that of normal FVIII/vWF, while plasmin-inactivated FVII/vWF was completely cleaved to lower molecular weight fragments. Some of the reported variations in the ability of rabbit antibodies to inhibit procoagulant activity may be due to partial degradation of the starting antigen. The retention by FVIII/vWF protein of its immunologic properties even after extensive proteolytic degradation suggests that under nondenaturing conditions, the conformation of the native and degraded molecules are very similar.

Antibody Specificity↗
PubMed1978

[Reflex factors that modify the effect of p-chlorophenylalanine on ovulation and reproduction in rats (author's transl)].

The appearance of reflex ovulation in rats under the influence of the copulation, has been studied. Evaluation of insemination, fecundation, number of embryos, ovarian cycle and ovulation in several groups of rats treated with doses of p-CPA (300 mg/Kg, i.p.), have been made. The application of p-CPA 48 hours before the estrus phase, inhibits the ovulation. This increases significantly through copulation. Reproduction is totally inhibited by p-CPA in animals under copulation conditions during 24 hours of the estrus phase. The inhibition is desappears if placed under copulation conditions during a full cycle. Inseminated rats had a 33% decrease in number of embryos with respect to the control group. The application op-CPA 24 hours before the estrus phase does not produce any inhibition effect. The decrease observed in the number of embryos is non-significant. When p-CPA is applied, instead, 48 hours before the estrus phase, there is total inhibition of the reproductive conduct.

Animals↗
PubMed1976

Factors that modify the radio-response of cancer of the nasopharynx.

A study of 152 cases of carcinoma of the nasopharynx was carried out for evaluation of various features of the tumors. Survival is greatest in middle aged patients and poorest in patients under 20 years of age. Patients who presented with lymph node involvement had a better survival rate than those without, and those with undifferentiated tumors survived longer, although tumors in this group metastasized earlier. Those tumors which arose on the postero-superior wall of the nasopharynx were associated with a lower cure rate than those situated elsewhere. Spread to adjacent tissues diminished the cure rate, but the rate fell particularly low if there was spread to bone or to the central nervous system. If no neck lymph nodes were involved, patients with undifferentiated and well-differentiated lesions fared equally well, but if there was involvement of the neck lymph nodes, those with undifferentiated primary lesions obtained a better cure rate. The influence of the type of local spread, the presence of distant metastasis, and survival in relation to the histological and clinical grading of the tumor were also evaluated.

Adult↗
PubMed2022

Epigenome-wide meta-analysis of PTSD symptom severity in three military cohorts implicates DNA methylation changes in genes involved in immune system and oxidative stress.

Epigenetic factors modify the effects of environmental factors on biological outcomes. Identification of epigenetic changes that associate with PTSD is therefore a crucial step in deciphering mechanisms of risk and resilience. In this study, our goal is to identify epigenetic signatures associated with PTSD symptom severity (PTSS) and changes in PTSS over time, using whole blood DNA methylation (DNAm) data (MethylationEPIC BeadChip) of military personnel prior to and following combat deployment. A total of 429 subjects (858 samples across 2 time points) from three male military cohorts were included in the analyses. We conducted two different meta-analyses to answer two different scientific questions: one to identify a DNAm profile of PTSS using a random effects model including both time points for each subject, and the other to identify a DNAm profile of change in PTSS conditioned on pre-deployment DNAm. Four CpGs near four genes (F2R, CNPY2, BAIAP2L1, and TBXAS1) and 88 differentially methylated regions (DMRs) were associated with PTSS. Change in PTSS after deployment was associated with 15 DMRs, of those 2 DMRs near OTUD5 and ELF4 were also associated with PTSS. Notably, three PTSS-associated CpGs near F2R, BAIAP2L1 and TBXAS1 also showed nominal evidence of association with change in PTSS. This study, which identifies PTSD-associated changes in genes involved in oxidative stress and immune system, provides novel evidence that epigenetic differences are associated with PTSS.

Adaptor Proteins, Signal Transducing↗
PubMed1977

Gated proton conduction via the coupling factor of photophosphorylation modified by N,-N-orthophenyldimaleimide.

The membrane bound coupling factor of photophosphorylation is studied after pretreatment of broken chloroplasts with the bifunctional N,N-orthophenyldimaleimide under energization of the thylakoid membrane by mild flashing light. The proton conduction of the membrane is monitored both via the electrochromic absorption changes and via selective pH-indicating dyes. It is found that the coupling factor, after interaction with N,N-orthophenyldimaleimide during the preillumination period, shortcircuits one of the two protons pumped inside after excitation of chloroplasts with one short flash of light. In contrast to the low proton conductivity of the unperturbed thylakoid membrane (relaxation time for a proton gradient greater than 5s), this extra proton channel leads to a partial relaxation of a proton gradient within a few ms. Although limited to only one proton per electron, this extra proton conducting pathway is not otherwise specific. It operates with protons resulting from both Photosystem I and Photosystem II activity. In addition it operates with protons already present in the internal phase before firing of the exciting light flash. These effects are prevented by the presence of ATP (but not GTP) during the preillumination period. It is suggested that the modified coupling factor is gated open by the light induced electric field across the thylakoid membrane while self closing after passage of one proton per activated coupling factor.

Chemical Phenomena↗
PubMed1979

Phophate-induced renal calcification in the rat.

Studies were done to investigate nephrocalcinosis produced in weanling female Wistar rats fed pelleted, semisynthetic diets. The rats were fed diets varying in concentrations of Ca and P supplied as inorganic salts for periods of 4--6 weeks and results compared with control rats fed laboratory rodent chow for the same period of time. Measurement of renal Ca and P concentrations showed that nephrocalcinosis was produced by semisynthetic diets with inorganic phosphate concentrations as low as 0.5% on a weight basis; in contrast, rats fed regular laboratory chow (P = 0.72%) showed no evidence of nephrocalcinosis. The severity of the lesion was proportional to dietary phosphate concentrations from 0.5 to 1.0% but other dietary factors modified the severity of the lesion. With the lower dietary phosphate of 0.5%, increasing dietary Ca from 0.5 to 1.0% decreased the severity of the renal calcification. Decreasing protein concentrations from 25 to 15% casein increased the severity of the renal lesions. Other dietary factors also appear to modify the phosphate-induced nephrocalcinosis since no lesions occurred in rats on laboratory chow. It is suggested that the availability of dietary phosphate may be a factor. The phosphate in the semisynthetic diets was totally inorganic while the natural foods of laboratory chow contain, at least in part, organic phosphate.

Animals↗
PubMed1979

Changing incidence of thyroid cancer.

The incidence of thyroid cancer was examined temporally and geographically by age and sex from data provided by tumor registries in the United States and abroad. The temporal trends in Connecticut showed an increase in annual incidence after 1945, with an especially sudden increase in incidence in females. The increase occurred predominantly in older males and younger females. The increase in young females was confirmed by cohort analysis. The rates rose with age in both sexes, but recently females have developed a secondary peak in the fourth decade of life. The same phenomenon was observed in other U.S. data but not as clearly in data from ten foreign registries. These observations are consistent with the hypothesis that X-radiation therapy for benign conditions of the head and neck in childhood was a factor in the increased incidence of thyroid cancer in U.S. females, but some other etiologic or modifying factor should be sought to explain the increased incidence in U.S. males.

Adult↗
PubMed2024

The associations between functional dyspepsia and potential risk factors: A comprehensive Mendelian randomization study.

BACKGROUND: Previous cross-sectional studies have identified multiple potential risk factors for functional dyspepsia (FD). However, the causal associations between these factors and FD remain elusive. Here we aimed to fully examine the causal relationships between these factors and FD utilizing a two-sample MR framework. METHODS: A total of 53 potential FD-related modifiable factors, including those associated with hormones, metabolism, disease, medication, sociology, psychology, lifestyle and others were obtained through a comprehensive literature review. Independent genetic variants closely linked to these factors were screened as instrumental variables from genome-wide association studies (GWASs). A total of 8875 FD cases and 320387 controls were available for the analysis. The inverse variance weighted (IVW) method was employed as the primary analytical approach to assess the relationship between genetic variants of risk factors and the FD risk. Sensitivity analyses were performed to evaluate the consistency of the findings using the weighted median model, MR-Egger and MR-PRESSO methods. RESULTS: Genetically predicted depression (OR 1.515, 95% confidence interval (CI) 1.231 to 1.865, p = 0.000088), gastroesophageal reflux disease (OR 1.320, 95%CI 1.153 to 1.511, p = 0.000057) and years of education (OR 0.926, 95%CI 0.894 to 0.958, p = 0.00001) were associated with risk for FD in univariate MR analyses. Multiple medications, alcohol consumption, poultry intake, bipolar disorder, mood swings, type 1 diabetes, elevated systolic blood pressure and lower overall health rating showed to be suggestive risk factors for FD (all p<0.05 while &#x2265;0.00167). The positive causal relationship between depression, years of education and FD was still significant in multivariate MR analyses. CONCLUSIONS: Our comprehensive MR study demonstrated that depression and lower educational attainment were causal factors for FD at the genetic level.

Humans↗
PubMed2026

Analysis of the Relationship between Early Clinical Factors and Glasgow Outcome Scale in Patients With Traumatic Brain Injury.

OBJECTIVE: This study aimed to evaluate the association between early clinical factors and the Glasgow outcome scale (GOS) in patients with traumatic brain injury (TBI). METHODS: We conducted a retrospective analysis of 98 TBI patients who underwent emergency surgery between January 2021 and January 2024. Based on GOS scores at 6 months post-surgery, patients were classified into a favorable outcome group (GOS&#xa0;&#x2265;&#xa0;4, defined as moderate disability or good recovery,&#xa0;n = 58) and an unfavorable outcome group (GOS < 4, i.e., death, persistent vegetative state, or severe disability,&#xa0;n = 40). Baseline and early clinical parameters were compared between groups. Statistically significant variables from univariate analysis were entered into a multivariate logistic regression model to identify independent prognostic factors. RESULTS: Significant intergroup differences were observed in age, time from injury to surgery, bleeding site, midline shift, Glasgow coma scale (GCS) score at admission, blood glucose level, and D-dimer level (all p < 0.05). Multivariate analysis confirmed that age, time from injury to surgery, GCS score, blood glucose, and D-dimer level were independent predictors of GOS (all p < 0.05). CONCLUSION: Early clinical factors, including age, time to surgery, GCS score, blood glucose, and D-dimer level, independently influence GOS in TBI patients. Time from injury to surgery&#xa0;emerged as a potentially modifiable factor in this cohort, suggesting that minimizing delays may improve outcomes.

Humans↗
PubMed2026

Factors associated with periprosthetic joint infection following total knee arthroplasty: an updated systematic review and meta-analysis.

BACKGROUND: This study aimed to systematically evaluate factors associated with periprosthetic joint infection (PJI) following total knee arthroplasty (TKA), and thereby to provide evidence-based references for clinical prevention and perioperative risk stratification. METHODS: Computerized searches were conducted in the following databases from their inception until May 26, 2025: PubMed, Web of Science, Embase, the Cochrane Library, CINAHL, China National Knowledge Infrastructure, Wanfang Database, Chinese Scientific Journal Database, and Chinese Biomedical Literature Database. Two researchers independently screened the literature, extracted data, and assessed study quality. The methodological quality was assessed using the Newcastle-Ottawa Scale. Quantitative synthesis was performed when at least two studies reported comparable exposure definitions and sufficient comparator information; otherwise, narrative synthesis was used. Review Manager 5.4 software was used for the primary analysis. This study is registered on PROSPERO (CRD420251079339). RESULTS: A total of 25 observational studies were included in the qualitative synthesis, of which 24 contributed to the primary quantitative synthesis. Quantitatively pooled factors associated with PJI included male sex (OR&#xa0;=&#xa0;1.39, 95% CI 1.27-1.51), BMI &#x2265;30&#xa0;kg/m2 (OR&#xa0;=&#xa0;5.72, 95% CI 2.65-12.36), prolonged operative time, type 2 diabetes mellitus (OR&#xa0;=&#xa0;2.09, 95% CI 1.45-3.01), rheumatoid arthritis (OR&#xa0;=&#xa0;2.64, 95% CI 1.38-5.02), smoking (OR&#xa0;=&#xa0;1.65, 95% CI 1.34-2.04), blood transfusion (OR&#xa0;=&#xa0;2.27, 95% CI 1.59-3.25), American Society of Anesthesiologists score &#x2265;3 (OR&#xa0;=&#xa0;2.73, 95% CI 1.02-7.32), history of hormone therapy (OR&#xa0;=&#xa0;4.88, 95% CI 2.90-8.22), postoperative urinary tract infection (OR&#xa0;=&#xa0;3.59, 95% CI 1.15-11.21), intraoperative blood loss >200&#xa0;ml (OR&#xa0;=&#xa0;1.51, 95% CI 1.03-2.22), postoperative drainage tube placement duration &#x2265;24&#xa0;h (OR&#xa0;=&#xa0;2.23, 95% CI 1.50-3.32), preoperative anemia (OR&#xa0;=&#xa0;1.82, 95% CI 1.67-1.99), and combined pulmonary disease (OR&#xa0;=&#xa0;5.54, 95% CI 1.93-15.96). Age was narratively summarized because its classification differed substantially across studies. CONCLUSION: Multiple demographic, comorbidity-related, and perioperative factors were associated with PJI after TKA. However, because the included studies were observational and clinically heterogeneous, these findings should be interpreted as associations rather than causal effects. Optimization of modifiable factors may help reduce the burden of PJI, but further prospective studies using standardized PJI definitions and adjusted effect estimates are required.

Humans↗
PubMed2026

Genetic architecture of endometriosis: risk factors, comorbidities and clinical implications.

BACKGROUND: In 1999, Dr Susan Treloar and colleagues conducted a landmark twin study in Australia and reported their estimate of 51% for the heritability of endometriosis. This important result led several groups to begin mapping genetic factors contributing to increased endometriosis risk. Despite early challenges, advances in genome-wide association studies (GWAS) have identified multiple genetic risk factors and some target genes implicated in follow-up studies on genetic regulation of transcription. Access to large publicly available genetic datasets and analysis with endometriosis GWAS results is also providing new opportunities to answer important questions about comorbid conditions associated with endometriosis and their implications for clinical practice. OBJECTIVE AND RATIONALE: The objective of the review is to summarize the last 25 years of genetic studies in endometriosis, outline contributions to our understanding of the disease, and suggest future directions to accelerate biological insights from genetic studies to improve clinical outcomes. SEARCH METHODS: A comprehensive review of scientific literature on the genetics of endometriosis was conducted through searches in PubMed and Google Scholar up to June 2026. Search terms included "endometriosis AND (genetics OR GWAS OR genetic risk factors)", For studies addressing the functional characterization of genetic risk loci, additional searches employed the terms "endometriosis AND (genotype-phenotype associations OR colocalization OR eQTL OR mQTL OR multi omics methods)". To identify studies examining shared genetic risk between endometriosis and comorbid conditions, the search strategy included "endometriosis AND (genetic correlation OR colocalization OR Mendelian randomisation)". Publications reporting discoveries related to genetic risk factors for endometriosis and studies interpreting their biological and clinical significance were critically evaluated, and 144 publications were discussed in the review. OUTCOMES: Discovery of genetic risk factors started slowly and has accelerated in recent years with developments in technology and international collaborations to combine data and increase statistical power. GWAS have mapped 80 genetic risk factors that implicate gene regulation of hormonal targets, development of the reproductive tract, regulation of cell proliferation, and regulation of epithelial cell differentiation. In common with most other complex diseases, effects of individual common genetic risk factors are small. However, several examples demonstrate that small effect sizes are not a good predictor for the impact of drugs developed against genetically validated targets. Genetic risk factors implicate five genes regulating gonadotrophin release and oestrogen action, the major target pathway of current drugs for treatment of endometriosis demonstrating proof-of-principal for biologically meaningful results. Genetic correlation and Mendelian Randomization studies highlight important causal relationships between endometriosis and comorbid conditions including a possible role for testosterone during development and shared genetic risk factors for gynaecological, gastrointestinal, pain, psychiatric, and inflammatory conditions. Understanding causal relationships between endometriosis and related conditions will aid clinical management and more personalized treatments. WIDER IMPLICATIONS: Genetic studies provide novel insights into endometriosis pathogenesis and associations with related comorbid conditions. Genetic factors modifying gene regulation and disease risk likely act in specific cell types, and access to datasets from genetically informed cell-based models, single-cell and spatial omics data are needed to accelerate progress. Future studies should address critical questions of heterogeneity and disease subtypes, expand the search for genetic risk factors to non-European populations, evaluate the role of rare and structural variants, and better integrate data from functional, genomics, genetics, and clinical studies to reduce diagnostic delay, develop novel treatment strategies, and translate discoveries into personalized management strategies for affected individuals. REGISTRATION NUMBER: N/A.

comorbid conditions↗
PubMed1977

Initial rate kinetic analysis of the mechanism of initiation complex formation and the role of initiation factor IF-3.

Initial rate kinetics of the formation of ternary complexes of Escherichia coli 30S ribosomal subunits, poly(uridylic acid), and N-acetylphenylalanyl transfer ribonucleic acid in the presence and in the absence of IF-3 are consistent with the hypothesis that the ternary complex is formed through a random order of addition of polynucleotide and aminoacyl-tRNA to separate and independent binding sites on the 30S ribosomes. The transformation of an intermediate into a stable ternary complex which probably entails a rearrangement of the ribosome structure leading to a codon-anticodon interaction represents the rate-limiting step in the formation of the ternary complex. The rate constant of this transformation, as well as the association constants for the formation of the 30S-poly(U) and 30S-N-AcPhe-tRNA binary complexes, are enhanced by the presence of IF-3 which acts as a kinetic effector on reactions which are intrinsic properties of the 30S ribosome. The IF-3-induced modification of these kinetic parameters of the 30S ribosomal subunit can per se explain the effect of IF-3 on protein synthesis without invoking a specific action at the level of the mRNA-ribosome interaction. This seems to be confirmed by the finding that IF-3 can stimulate several-fold the formation of a ternary complex even if one by-passes the ribosome-template binding step by starting with a covalent 30S-polynucleotide binary complex. Furthermore, the above-mentioned changes induced by IF-3 appear to be compatible with the previously proposed idea that the binding of the factor modifies the conformation of the 30S subunit. The random order of addition of substrates determined for the 30S-N-AcPhe-tRNA-poly(U) model system was found to be valid also for the more physiological 30S initiation complex containing poly(A,U.G) and (fMet-tRNA formed at low Mg2+ concentration in the presence of GTP and all three initiation factors.

Escherichia coli↗
PubMed2026

The presence or absence of standard modifiable cardiovascular risk factors in patients with myocardial infarction impacts long-term but not 30-day mortality: a UK Biobank prospective cohort study.

AIMS: Prior studies reported higher early mortality after acute myocardial infarction (MI) in patients without standard modifiable cardiovascular risk factors (SMuRFs), warranting further validation. We aimed to evaluate whether SMuRF-absence is associated with increased 30-day cardiovascular mortality following MI. METHODS AND RESULTS: We conducted a population-based cohort study using UK Biobank data (n = 487 177). Incident MI cases occurring between 2006 and 2022 were identified through linkage to hospital and death registries. Standard modifiable cardiovascular risk factors (diabetes, hypertension, hypercholesterolaemia, current smoker) were defined at baseline and continuously assessed until MI onset. Thirty-day mortality following MI was estimated using Cox proportional hazards models, adjusted for sociodemographic, clinical, and cardiogenomic variables, were used to estimate 30-day mortality risks. Logistic regression model was used to estimate mortality risk at 10 years post-MI. Among 15 463 patients experiencing an MI (1034 without SMuRFs), SMuRF-absence was not significantly associated with 30-day mortality (HR: 0.82, 95% CI: 0.65-1.04, P = 0.103). Propensity score-matched analyses supported these findings (HR: 0.95, 95% CI: 0.69-1.29, P = 0.729). Further analyses stratified by distinct time intervals (2006-2022) revealed no significant modification of this association by advancements in acute MI management. Interaction analyses indicated no significant effect modification by sex, age, socioeconomic status, or period of MI occurrence. However, extended analysis to 10 years revealed that SMuRF absence was significantly associated with lower long-term mortality (OR: 0.61, 95% CI: 0.49-0.75, P < 0.01). CONCLUSION: In this population-based cohort, SMuRF status significantly impacted long-term but not short-term mortality following MI, indicating early survival is predominantly driven by acute-phase factors rather than baseline cardiovascular risk profiles.

Humans↗
PubMed2026

Integrative Analysis Uncover the Effects and Multi-Omics Features of Thigh Muscle Fat Infiltration.

The health impacts and underlying biological pathways of thigh muscle fat infiltration (TMFI) remain incompletely understood. In this study, we analyzed TMFI measured by magnetic resonance imaging in 55,120 UK Biobank participants and found that higher TMFI was significantly associated with all-cause mortality as well as with all major system-specific diseases examined (p values ranged from 2.50&#x2009;&#xd7;&#x2009;10-88 to 9.97&#x2009;&#xd7;&#x2009;10-04). TMFI also mediated the effects of lifestyle factors on health-related outcomes, with mediation proportions ranging from 6.7% to 71.7%. A genome-wide association study (GWAS) identified 79 lead single nucleotide polymorphisms (SNPs) linked to TMFI, and the polygenic risk score for TMFI was significantly associated with mortality and all incident diseases across examined organ systems in an independent subset of UK Biobank participants of European ancestry who were not included in the TMFI GWAS (n&#x2009;=&#x2009;362,286, all p&#x2009;<&#x2009;0.05). Gene-drug interactions identified multiple drugs that could potentially modulate TMFI. Analysis of single-cell transcriptomic data indicated that myogenic cells were strongly linked to TMFI (p&#x2009;=&#x2009;7.08&#x2009;&#xd7;&#x2009;10-08). Summary-data-based Mendelian randomization and Transcriptome-Wide Association Study analyses revealed numerous genes whose expression in specific tissues was associated with TMFI. Proteomic and metabolomic profiling uncovered a broad array of circulating biomarkers associated with TMFI, many of which mediated the effects of modifiable factors and genetic risk on TMFI. Overall, our results highlight the biological relevance of TMFI to human health and provide insights into the multi-omics mechanisms underlying TMFI, identifying potential targets for interventions.

Humans↗
PubMed1976

Adenine arabinoside therapy of herpes zoster in the immunosuppressed. NIAID collaborative antiviral study.

We evaluated adenine arabinoside treatment of herpes zoster in immunodeficient patients in a randomized, controlled crossover study. The two study groups had similar characteristics. In spite of rapid natural healing, those receiving adenine arabinoside over the first five days had accelerated clearance of virus from vesicles (P = 0.01), and cessation of new vesicle formation (P = 0.004), and a shorter time to total pustulation (P = 0.001). Factors modifying the response to therapy included age, underlying disease, and the duration of zoster prior to therapy. Clinical toxicity was minimal. Laboratory assessment of bone-marrow, liver and renal function showed insignificant alterations as a result of therapy. These studies show that adenine arabinoside is a drug with promise for therapy of systemic herpes zoster in immunocompromised patients. It is most efficacious when administered during the first six days of disease (P = 0.001) to those who have reticuloendothelial neoplasia (P = 0.001) and are less than 38 years of age (P = 0.001).

Adult↗