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AI Health message intervention: The role of message customization and message source in breast cancer screening among women of color.

OBJECTIVES: To examine the effectiveness of breast cancer screening messages with varying levels of customization (generic, targeted, and tailored) and to compare AI-generated versus human-generated messages. METHODS: A between-subjects experimental design with a control condition was employed. Message content followed a standardized structure and varied by level of customization: generic, targeted (demographic-based), and tailored (perceived susceptibility- and barrier-based). Messages were developed by either the authors or GenAI (ChatGPT-4o). A total of 391 participants recruited via Prolific were randomly assigned to five groups (generic, targeted-human, targeted-AI, tailored-human, and tailored-AI). Self-efficacy, behavioral intentions, attitudes, and message believability were measured using different scales. RESULTS: Customized (tailoring and targeting) health messages performed comparably to generic messages in shaping positive health outcomes. GenAI-generated messages also produced outcomes comparable to those of human-generated messages under standardized conditions. Significant negative indirect effects through message believability for the human-tailored condition was found relative to the generic condition. CONCLUSIONS: GenAI may be a useful tool for developing and customizing scalable health messages. Its effectiveness depends not only on customization but also on maintaining message quality, including readability, clarity, coherence, naturalness, and credibility. PRACTICAL IMPLICATIONS: GenAI may support health practitioners in developing customized and scalable breast cancer messages. However, professional review remains necessary to ensure that the message is culturally appropriate, responsive to patient concerns, and suitable for use alongside patient-provider communication.

Humans↗

Whole genome sequence of a superbug-Escherichia coli strain KAB-AI-497 isolated from the vagina of a 20 year old pregnant woman with premature rupture of membrane (PROM) in a resource limited setting, Kabale Regional Referral Hospital, in Uganda.

OBJECTIVES: The objective of the study is to sequence the whole genome of multidrug resistant E. coli strain KAB-AI-497 that causes bacterial vaginosis and implicated in premature rupture of membrane in pregnant woman. DATA DESCRIPTION: The DNA of the E. coli strain KAB-AI-497 was extracted using the MagAttract HMW DNA Kit, and the extracted DNA was sequenced using an MGI DNBSEQ G99ARS platform. FastQC was used to perform quality control analysis and the reads were trimmed by Trimmomatic. De novo genome assembly was performed by SPAdes and it resulted to a draft assembled genome that has 5.1 Mb genome size, 153 contigs, and 50.5% GC content. Quality analysis of the assembled genome revealed it has 98.46% completeness and 0.97% contamination. The closest E. coli strain to this strain KAB-AI-497 in terms of similarity was Escherichia coli SMS-3-5 with an average nucleotide identity of 98.43% and genome coverage of 86.19%, which confirmed the species level identity of the strain. The assembled genome was annotated using the NCBI Prokaryotic Genome Annotation Pipeline which identified 4,726 protein coding genes in the strain genome. Furthermore, the annotation revealed the genome has resistant genes responsible for resistance against many antibiotic classes such as tetracycline, fluoroquinolone, and penicillin.

Escherichia coli↗

User Engagement and Feature Preferences in an AI-Powered mHealth Intervention for Diabetes Prevention: Secondary Analysis of a Randomized Controlled Trial.

BACKGROUND: Prediabetes is highly prevalent and increasing globally, yet lifestyle interventions remain underused. AI-driven mobile health (mHealth) tools can help scale diabetes prevention efforts, but the key factors driving their success are not well understood. OBJECTIVE: This post hoc secondary analysis of a randomized controlled trial (RCT) aimed to characterize the most valued features and the role of user engagement in outcomes of a fully automated mHealth intervention for diabetes prevention. METHODS: Data from 151 participants with prediabetes and overweight or obesity who were assigned to an AI-based diabetes prevention program (Sweetch) in a parent RCT (NCT05056376) were analyzed. Engagement (defined as the total number of days the app was used) was categorized into tertiles (low, medium, and high). Baseline characteristics were compared across engagement groups using ANOVA, Kruskal-Wallis, and chi-square tests, and regression models assessed the association between engagement and achievement of diabetes risk reduction outcomes (&#x2265;5% weight loss, &#x2265;4% weight loss with &#x2265;150 min/week of physical activity, or &#x2265;0.2 percentage point reduction in hemoglobin A1c [HbA1c] at 12 months). Perceived usefulness of intervention features was surveyed at 12 months. RESULTS: Median engagement was 98 (IQR 34-232) days. Older age (P<.001) and lower baseline BMI (P=.04) were significantly associated with higher engagement. Compared with low engagement, high engagement was associated with greater odds of achieving the composite diabetes risk reduction outcome (odds ratio [OR] 2.59, 95% CI 1.11-6.01; P=.03), &#x2265;5% weight loss (OR 3.31, 95% CI 1.16-9.42; P=.03), and &#x2265;0.2 percentage point reduction in HbA1c (OR 3.57, 95% CI 1.19-10.75; P=.02). Participants most frequently rated weight tracking, physical activity tracking, and the digital body weight scale as the features that were most helpful for achieving their health goals. CONCLUSIONS: Higher engagement with an AI-driven intervention requiring no human intervention was associated with improved diabetes risk reduction. Contrary to concerns about lower digital literacy, older adults engaged with the intervention more than younger adults. Features related to weight and physical activity tracking were most valued by patients in the program. TRIAL REGISTRATION: ClinicalTrials.gov NCT05056376; https://clinicaltrials.gov/study/NCT05056376.

Humans↗

A comprehensive review of AI innovations for tackling antimicrobial resistance.

Antimicrobial resistance (AMR) represents a major global public health concern, rendering available antimicrobials ineffective and leading to infections that are difficult to treat. Artificial intelligence (AI) has been increasingly applied across the AMR continuum, including resistance prediction, rapid diagnostics, new antimicrobial discovery, drug repurposing, antimicrobial surveillance, and clinical decision support. In this review, we aim to highlight recent developments in the use of artificial intelligence (AI) to address antimicrobial resistance (AMR). In addition, we review computational methods that help interpret genomic, phenomic, clinical, and epidemiological data to support the development of treatment strategies and novel antimicrobial agents. The key issues addressed include data quality, model interpretability, external validation, regulatory requirements, privacy, and fairness. While AI is not a complete solution to AMR, it can certainly strengthen the global AMR response by complementing key areas of AMR such as antimicrobial stewardship, infection prevention, laboratory diagnostics, and global surveillance.

Antimicrobial resistance (AMR)↗

Effects of T'ai Chi on balance.

OBJECTIVE: To determine if the practice of T'ai Chi significantly improves balance. METHODS: Twenty-two persons with mild balance disorders were studied. Five measures of balance were obtained, including 3 objective measures (moving platform posturography, Romberg testing, and reach testing) and 2 disability questionnaires (Dizziness Handicap Inventory and a modified Medical Outcomes Study general health survey). To be included, patients were required to be able to stand in the eyes-closed regular Romberg position for 30 seconds. The subjects underwent 8 weeks of T'ai Chi training and practice and then were retested. RESULTS: Highly significant improvements were found on both the posturography test and the Dizziness Handicap Inventory questionnaire scores (P<.001 and P=.004, respectively). Trends toward improvement were also noted in Romberg test results and the Medical Outcomes Study survey (P=.03 for both). Reach was not improved. CONCLUSION: These findings suggest that T'ai Chi training improves balance.

Adult↗

New MspI polymorphism at +83 bp of the human apolipoprotein AI gene: association with increased circulating high density lipoprotein cholesterol levels.

We recently showed that loss of a MspI restriction site in the 5'-end (intron 1) of the apolipoprotein (apo) AI gene is due to a C to T transition (+83 bp) and/or a G to A transition (+84 bp). Since this region may be relevant to the regulation of apo AI gene expression and therefore to plasma high density lipoprotein cholesterol (HDL-C), we explored the association between this MspI polymorphic site and circulating HDL-C levels in 243 healthy Caucasians. There were 143 aged 18-67 years (60 males and 83 females) and 100 aged 6-12 years (58 males and 42 females). We also compared this association with a known MspI polymorphic site, a G to A transition at -75 bp of the apo AI gene. The rare allele (-) frequency for the polymorphism at +83 bp was 4.1% and 22.1% for the polymorphism at -75 bp. Subjects heterozygous for the loss of the MspI restriction site at +83 bp (genotype: M2+-, n = 20) had higher HDL-C levels than M2+2 subjects (mean +/- SD: 1.73 +/- 0.31 vs. 1.41 +/- 0.39 mmol/l, P < 0.05 for adults; 1.71 +/- 0.33 vs. 1.34 +/- 0.29 mmol/l, P < 0.01 for children). Adults with the G to A substitution at -75 bp also had higher HDL-C levels (1.56 +/- 0.36 mmol/l for AA, 1.53 +/- 0.38 mmol/l for GA, and 1.36 +/- 0.38 mmol/l for GG, P < 0.05); this difference was not observed in the children. The MspI polymorphisms at both sites were in linkage disequilibrium. Their joint effect on the HDL-C levels was also significant and individuals with rare alleles (-) at both sites had the highest HDL-C levels. In an analysis of variance, the MspI polymorphism at +83 bp, and at -75 bp and gender independently accounted for 6.5%, 1.7%, and 5.9%, respectively, of the variance in circulating HDL-C levels when age was controlled as a covariate. We conclude that loss of the MspI site by the C to T (+83 bp) and/or the G to A (+84 bp) transitions is highly associated with increased HDL-C levels. The association appears to be more significant than that of the G to A transition at -75 bp.

Adolescent↗

Anatomy of layer IV in cat primary auditory cortex (AI).

The structure of neurons and axons in layer IV was studied as part of a larger inquiry into the organization of primary auditory cortex (AI) in the cat. Tissue from the convexity of the middle ectosylvian gyrus between the anterior and posterior ectosylvian sulci was studied in Golgi, Nissl, Bodian, plastic-embedded, and other preparations from adult animals. Layer IV is defined as a strip about 200-250 micron thick consisting predominantly of small non-pyramidal neurons intercalated between the pyramidal somata of layers III and V, and in which few commissurally projecting cells occur. Lying some 800-900 micron beneath the pia, layer IV has six types of neurons, as seen in Golgi-stained material from anatomically and physiologically defined AI. These include three varieties (small, medium-sized, and large) of tufted neurons with intracortically branching axons and vertically polarized, cylindrical dendritic fields. Besides the tufted cells, which are the most numerous neurons in layer IV, large multipolar, double bouquet, and spiny stellate cells are scattered through layer IV. Each has a characteristic neuronal architecture and intracortical axonal branches. Smaller tufted cell somata dominate the upper half of layer IV (IVa), larger tufted cells are more common deep in layer IV (IVb). The average somatic area in midnuclear , plastic-embedded sections is 158 micron2. Layer IV (and layer IIIb) receive thick, probably ascending fibers, forming narrow, vertical terminal fields. These axons may be of thalamic origin and overlap with alternating, 50-75-micron-wide columns of somata and neuropil in layer IV. Layer III pyramidal cell axons often project to layer IV and ramify vertically and horizontally. The average height-width ratio of the dendritic domains of layer IV cells is about 3.6:1. The vertically disposed dendrites of layer IV cells, the columnar arrangement of their local axonal branches, and the polarized form of intrinsic and extrinsic axons collectively reinforces the columnar pattern in layer IV. Many layer IV cells structurally resemble neurons in layer IV in the primary visual and somatic sensory cortex. However, most AI cells have a pronounced columnar arrangement of their somata and an elongated, narrow form. The axons of many layer IV cells preserve this vertical arrangement and often branch in layer III and, to a lesser degree, in layer V.(ABSTRACT TRUNCATED AT 400 WORDS)

Animals↗

The pyramidal neurons in layer III of cat primary auditory cortex (AI).

The neuronal architecture of pyramidal cells in layer III of the primary auditory cortex (AI) of adult cats was examined as a prelude to connectional and fine structural studies; in a further paper, the results of parallel studies of non-pyramidal layer III cells are presented. Layer III is about 400 micron thick, comprises about one-quarter of the thickness of AI, and lies some 400-800 micron deep to the pial surface. It is distinguished in Nissl, fiber, and Golgi preparations from layers II and IV, and also on connectional grounds, since its neurons are one of the principal inputs to the contralateral AI. Layer III may be divided into two roughly equal tiers on the basis of its neuronal and cytoarchitecture. Layer IIIa is populated by small cells with oval somata and many tiny pyramidal cells; the fiber architecture is dominated by radial bundles of medium-sized axons interspersed among columns of apical dendrites arising from deeper-lying pyramidal cells. In layer IIIb medium-sized and large pyramidal cells are more numerous, and the fiber architecture has a different, much denser texture, including extensive lateral components which invade layer IV, and large contingents of descending, probably corticofugal, axons. Five kinds of pyramidal neurons occur in Golgi preparations. Most numerous are the small, medium-sized, and large pyramidal cells; the two types of star pyramidal neurons are less common. The small pyramidal cell has a limited dendritic field and rather delicate dendrites; all but the apical one usually end in layer III. The medium-sized pyramidal cell is the most common neurons, and its rich basilar dendritic arbors are conspicuous, with their many dendritic appendages, in the layer III neuropil; their distal dendrites spread into layer IV. The largest pyramidal cells lie mainly in layer IIIb, and their lateral dendrites often mark the layer IIIb-IVa border. The apical dendrites of medium-sized and large pyramidal cells often extend to layer Ib, where they branch obliquely. The axons of these cells branch laterally after descending through layer III and toward the white matter. Often secondary or tertiary branches reascend to layer IV and more superficially; there is considerable stereotypy in this branching pattern. These numerous secondary branches contribute heavily to the layer IIIb-IVa lateral fiber plexus. The fourth variety of pyramidal cell has a round soma and a stellate dendritic field whose distal branches extend from layer V to layer I, but whose axon is chiefly in layer III. Finally, a star pyramidal cell with long lateral basilar arbors but rather smooth dendrites completes the picture.(ABSTRACT TRUNCATED AT 400 WORDS)

Afferent Pathways↗

Thalamic projections to fields A, AI, P, and VP in the cat auditory cortex.

Thalamocortical projections to four tonotopic fields (A, AI, P, and VP) of the cat auditory cortex were studied by using combined microelectrode mapping and retrograde axonal transport techniques. Horseradish peroxidase (HRP) or HRP combined with either tritiated bovine serum albumin or nuclear yellow was injected into identified best-frequency sites of one or two different fields in the same brain. Arrays of labeled neurons were related to thalamic nuclei defined on the basis of their cytoarchitecture and physiology. In some cases, patterns of labeling were directly compared with thalamic best-frequency maps obtained in the same brain. We compared only patterns of labeling resulting from injections into similar parts of the frequency representation in different fields to insure that observed differences in patterns of labeling did not simply reflect differences in the frequency representation at the injection sites. The thalamic projection to the four fields is divided among seven nuclei, three tonotopic nuclei (ventral nucleus, V; lateral part of the posterior group of thalamic nuclei, Po; and dorsal cap nucleus, d) and four nontonotopic nuclei (caudodorsal nucleus, cd; ventrolateral nucleus, vl; and small, Ms; and medium-large, Mg, cell regions of the medial division). Projections to each field differ, and each field receives inputs from tonotopic and nontonotopic nuclei. Field A receives its major inputs from Po and Mg, and a minor input from V. Field AI receives its major inputs from V, Po, and Mg, although Po and Mg have heavier projections to field A. Field P receives its major inputs from V, d, and vl; and minor inputs from cd, Ms, Mg, and Po. Field VP receives major inputs from V, vl, and cd; and minor inputs from d, Ms, and Mg. There are segregated territories in V and Po in which most neurons projects to one cortical field (major projection), and a smaller proportion projects to one or more other fields (minor projections). Field VP receives a major projection from the caudal pole of V. Field P receives a major projection from the caudal half of V, and from a thin band along the dorsal border of rostral V. Field AI receives a major projection from most of the rostral one-half of V, and smaller areas in Po and the caudal half of V exclusive of its caudal pole. Field A receives a major projection from most of Po.(ABSTRACT TRUNCATED AT 400 WORDS)

Animals↗

Intracortical connections and their physiological correlates in the primary auditory cortex (AI) of the cat.

We studied the functional and anatomical properties of the intrinsic connections in the primary auditory cortex (AI) of the cat by using physiological mapping and retrograde tracing methods. Our results revealed that a focal microinjection of tracer labeled as many as five intracortical patches in AI. The patches contained labeled pyramidal and non-pyramidal cell types, most of which were clustered in the middle layers. A densely distributed anterograde-like reaction product was present in the superficial layers above the labeled cells. The distribution of the patches was anisotropic, with most patches occurring dorsal, ventral, and anterior to the injection site. We examined the correlation between the characteristic frequency (CF) and binaural response properties of the injected and labeled regions. We found local labeling in regions possessing CFs equivalent to or slightly greater than that of the injected area. This appears to be a specific connection since we were able to predict the general location of many of the patches on the basis of the organization of the isofrequency domains. Patches were more numerous dorsoposterior to the injection site when the isofrequency contours ran obliquely (i.e., dorsoposterior to ventroanterior) across AI. The binaural response properties of the injected and labelled regions, however, were unrelated.

Animals↗

Two-locus and bivariate segregation analysis of HDL-C and apo AI.

Two-locus and bivariate segregation analyses of HDL-C and apo AI were carried out using the GAW8 Berkeley data set. For HDL-C, results are ambiguous. Both the mixed environmental model and the mixed Mendelian model fit the data equally well. For apo AI, however, univariate one-locus segregation analysis suggests a Mendelian major gene controlling its levels. Moreover, two-locus analysis suggests a second major gene is involved. Bivariate segregation analysis indicates these data cannot resolve the question as to whether a single Mendelian major gene with pleiotropic effects controls levels of both HDL-C and apo AI in humans.

Apolipoprotein A-I↗

Multivariate genetic analysis of apo AI concentration and HDL subfractions: evidence for major locus pleiotropy.

A major locus influencing apolipoprotein AI (apo AI) serum levels was detected using data from the Donner Laboratory Family Study. This locus accounts for 46% of the phenotypic variability in apo AI levels. Multivariate segregation analysis revealed that this major locus also has significant pleiotropic effects on the relative distribution of high density lipoproteins.

Apolipoprotein A-I↗

Enzyme-linked immunosorbent assay to measure apolipoproteins AI and B secreted by a human hepatic carcinoma cell line (Hep G2).

We describe an enzyme-linked immunosorbent assay (ELISA) to measure apolipoproteins AI and B secreted by Hep G2 cells and in cell homogenates. These assays utilize commercially available polyclonal antibodies, affinity-purified to improve their specificity, thereby achieving a dramatic increase in the sensitivity of the assay. These affinity-purified antibodies were also more sensitive than a series of monoclonal antibodies tested. We achieved a sensitivity of 0.4 ng in the apo AI assay, and a sensitivity of 5 ng in the apo B assay. By these methods, we measured secretion rates by Hep G2 cells of 358 +/- 41 ng/mg cell protein/hr for apo B and 137 +/- 8 ng/mg cell protein/hr for apo AI. These assays also allowed the measurement of intracellular apolipoproteins and thus can be used to facilitate investigations of human lipoprotein metabolism in cell culture systems.

Amino Acids↗

Isolation of suppressor sensitive mutants in the Ai gene of phage lambda.

Previous experiments have shown that mutations in the Ai gene can suppress the growth defect of lambda N- phages. Many temperature resistant derivatives of phage lambdatsN9 have been isolated and among these 5 have been found which are Ai- and have an amber suppressible behaviour. These mutants can help in defining the role of the Ai gene in phage lambda development.

Coliphages↗

Low serum apolipoprotein AI levels in amyloidosis related to familial Mediterranean fever.

Amyloidosis (A) related to familial Mediterranean fever (FMF) causes serious morbidity and mortality in children. Our study evaluates serum levels of apolipoprotein (Apo) AI, AII, B, and E and Apo AII/AI ratios as a non-invasive diagnostic tool for amyloidosis in children with FMF and FMF-A. Results were compared with those of patients with childhood nephrotic syndrome (NS) and healthy children (controls). Significantly lower serum levels of Apo AI (90.20+/-28.30 mg/dl) were documented in patients with FMF-A than in all other groups (FMF 126.89+/-51.07 mg/dl, NS 140.38+/-33.73 mg/dl, and controls 134.67+/-12.73 mg/dl) ( P<0.01). Diagnostic sensitivity, specificity, and predictive value for this test were 85%, 80%, and 85%, respectively. Apo AII/AI ratio results were essentially equal in all groups ( P>0.05). It is concluded that a decreased Apo AI serum level, but not Apo AII/AI ratio, is a useful, non-invasive test for the early diagnosis of FMF-A in children.

Adolescent↗

Genetic variation in the apolipoprotein AI-CIII-AIV gene cluster and coronary heart disease.

Six RFLPs in the apolipoprotein (apo) AI-CIII-AIV gene region detected with the restriction enzymes XmnI, MspI, PstI, SstI and PvuII were used to study the role of genetic variation at this locus in the development of coronary heart disease and in the regulation of serum levels of various lipid and lipoprotein parameters in the Austrian population. 106 male patients with coronary heart disease and 118 matched controls were investigated. None of the alleles defined by these RFLPs was associated with increased coronary risk. In the patients, but not in the control group individuals with the genotype P1P2 for the PstI polymorphism in the 3' flanking region of the apo AI gene had significantly lower serum levels of high density lipoprotein (HDL)-cholesterol and apo AI levels than those with the genotype P1P1. The S2 allele of the SstI polymorphism at the 3' end of the apo CIII gene was significantly associated with elevated serum levels of triglycerides in the patient, but not in the control group. Controls with the genotype V2V2 for the PvuII(A) polymorphism at the 5' end of the apo CIII gene had significantly higher serum levels of apo B than those with V1V1 or V1V2. This association did not exist among the patients. These findings suggest that variation associated with some of these RFLPs is contributing to the determination of lipid levels in patients and controls, but that the RFLPs themselves cannot be used as markers for increased coronary risk in the Austrian population.

Adult↗

Differential role of apolipoprotein AI-containing particles in cholesterol efflux from adipose cells.

Cholesterol efflux was studied in cultured Ob1771 adipose cells after preloading with LDL cholesterol. Exposure to particles containing apo AII (LpAI) and particles containing apo AI and apo AII (LpAI:AII) isolated from native human plasma, and from HDL2 or HDL3, showed that only LpAI were able to promote cholesterol efflux, despite the fact that both kinds of particles were able to bind to receptor sites within the same range of concentrations (apparent Kd values between 10 and 25 micrograms/ml). During this long-term exposure, LpAI:AII demonstrated a concentration-dependent inhibition (10-60 micrograms/ml) of LpAI-mediated cholesterol efflux from adipose cells under conditions where LpAI:AII did not deliver cholesterol to the cells and where no net change in the distribution of apo AI between LpAI and LpAI:AII was observed. The antagonizing and modulating role of LpAI:AII in preventing cholesterol efflux mediated by LpAI appears not to be related to the lipid composition and cholesterol content of the particles but, rather, appears dependent upon the presence of apo AI in LpAI particles and apo AII in LpAI:AII particles. The actual concentrations of these particles in the interstitial fluid bathing peripheral cells might be critical for the in vivo occurrence of cholesterol efflux.

Adipose Tissue↗

Genetic markers in the apo AI-CIII-AIV gene cluster for combined hyperlipidemia, hypertriglyceridemia, and predisposition to atherosclerosis.

The aim of the present study was to search for genetic determinants of combined hyperlipidemia and hypertriglyceridemia, and to evaluate whether such determinants might be associated with predisposition to atherosclerosis. Four DNA polymorphisms in the apo AI-CIII-AIV gene cluster (G to A mutation at position -75 basepairs in the apo AI promoter, XmnI, PstI and SstI) were studied in relation to combined hyperlipidemia, hypertriglyceridemia, lipoprotein levels, atherosclerosis and age in 221 Danish men. The frequency of the rare allele of the XmnI polymorphism, the X+ allele, was higher in individuals below 55 years of age with combined hyperlipidemia than in individuals with normal lipid levels (0.31 vs. 0.14; P = 0.05). The rare allele of the SstI polymorphism, the S+ allele, was more frequent in hypertriglyceridemic individuals compared with normotriglyceridemic individuals (0.16 vs. 0.09; P < 0.05) and on analysis of variance the combined S-S+ and S+S+ genotypes were also associated with the highest triglyceride levels. Furthermore, the frequency of the S+ allele decreased significantly as a function of age in nonatherosclerotic subjects (from 0.15 to 0.10 to 0.02 in 48-, 63- and 85-year-olds, respectively; 48- versus 85-year-olds, P = 0.03). These results suggest that genetic variation in the apo AI-CIII-AIV gene complex is associated with combined hyperlipidemia and hypertriglyceridemia and may have an impact on longevity and/or predisposition to atherosclerosis.

Aged↗