Nevin Manimala

J Nephrol. 2024 Jul 4. doi: 10.1007/s40620-024-02012-8. Online ahead of print.

ABSTRACT

BACKGROUND: Cystinuria is a rare genetic disease characterized by impaired tubular transport of cystine. Clinical features of cystinuria mainly include nephrolithiasis and its complications, although cystinuric patients may present with other comorbidities. There are currently no data on bone features of patients with cystinuria. Our aim is to characterize bone mineral density (BMD) in cystinuria.

METHODS: Our study included adult cystinuric patients with estimated glomerular filtration rate (eGFR) ≥ 60 mL/min/1.73 m² followed at 3 specialized outpatient clinics in Italy (Rome, Naples and Verona). Markers of bone turnover were analyzed in a centralized laboratory. Clinical, biochemical and dual-energy X-ray absorptiometry (DEXA) data were collected from September 2021 to December 2022. Linear regression models were used to evaluate statistically significant deviations from zero of Z-scores.

RESULTS: Twenty-seven patients were included in the study. Mean (SD) age was 37 (15) years, 41% were women. Mean estimated glomerular filtration rate was 99 mL/min/1.73 m². Serum parameters associated with bone turnover (parathyroid hormone, FGF23, calcium and phosphate) were all in the normal range, with only 4 patients showing mild hypophosphatemia. Prevalence of low bone mineral density, defined as Z-score ≤ – 2 at any site, was 15%. Average Z-scores were negative across most sites.

CONCLUSIONS: Our study suggests that cystinuric patients have lower bone mineral density compared with individuals of the same sex and age, even when their kidney function is normal.

PMID:38963523 | DOI:10.1007/s40620-024-02012-8

Odontology. 2024 Jul 4. doi: 10.1007/s10266-024-00976-4. Online ahead of print.

ABSTRACT

To evaluate the physical properties of enamel submitted to hydrogen peroxide (HP) incorporated with titanium dioxide nanoparticles (NP) co-doped with nitrogen and fluorine and irradiated with violet LED light (LT). Enamel-dentin disks were randomly allocated (T₀) into groups, according to HP (HP6, HP15, or HP35) and NP (no NP, 5NP, or 10NP) concentrations, and irradiated or not with LT. A negative control (NC) group was set. After three bleaching sessions (T₁, T₂, and T₃), specimens were stored in saliva for 14 days (T₄). Enamel surface microhardness number (KHN), surface roughness (Ra), cross-sectional microhardness (ΔS), energy-dispersive spectroscopy (EDS), scanning electron (SEM), and polarized light (PLM) microscopies were performed. Surface KHN was significantly influenced by NP over time, independently of LT irradiation. At T₃ and T₄, gels with 5NP and 10NP exhibited no KHN differences compared to NC and baseline values, which were not observed under the absence of NP. NP incorporation did not statistically interfere with the ΔS and Ra. PLM images exhibited surface/subsurface darkening areas suggestive of demineralizing regions. SEM demonstrated some intraprismatic affection in the groups without NP. EDS reported a higher enamel calcium to phosphorus ratio following 10NP gels applications. Gels with NP maintained the enamel surface microhardness levels and seemed to control surface morphology, upholding the mineral content. None of the proposed experimental protocols have negatively influenced the enamel surface roughness and the cross-sectional microhardness.

PMID:38963521 | DOI:10.1007/s10266-024-00976-4

J Math Biol. 2024 Jul 4;89(2):25. doi: 10.1007/s00285-024-02122-8.

ABSTRACT

The Ebola virus disease (EVD) has been endemic since 1976, and the case fatality rate is extremely high. EVD is spread by infected animals, symptomatic individuals, dead bodies, and contaminated environment. In this paper, we formulate an EVD model with four transmission modes and a time delay describing the incubation period. Through dynamical analysis, we verify the importance of blocking the infection source of infected animals. We get the basic reproduction number without considering the infection source of infected animals. And, it is proven that the model has a globally attractive disease-free equilibrium when the basic reproduction number is less than unity; the disease eventually becomes endemic when the basic reproduction number is greater than unity. Taking the EVD epidemic in Sierra Leone in 2014-2016 as an example, we complete the data fitting by combining the effect of the media to obtain the unknown parameters, the basic reproduction number and its time-varying reproduction number. It is shown by parameter sensitivity analysis that the contact rate and the removal rate of infected group have the greatest influence on the prevalence of the disease. And, the disease-controlling thresholds of these two parameters are obtained. In addition, according to the existing vaccination strategy, only the inoculation ratio in high-risk areas is greater than 0.4, the effective reproduction number can be less than unity. And, the earlier the vaccination time, the greater the inoculation ratio, and the faster the disease can be controlled.

PMID:38963509 | DOI:10.1007/s00285-024-02122-8

Int Urogynecol J. 2024 Jul 4. doi: 10.1007/s00192-024-05860-x. Online ahead of print.

ABSTRACT

INTRODUCTION AND HYPOTHESIS: This study was aimed at exploring the immediate impacts of pelvic floor muscle exercises (PFMEs) on various maternal physiological parameters in pregnant women.

METHODS: The study included a total of 52 women, 26 pregnant (Pregnant group: 28.04±6.01 years; 26.83±3.81 kg/m²) and 26 nonpregnant (Control group: 29.42±5.73 years; 25.41±3.03 kg/m²) individuals. All women received PFME as follows: PFME was performed for 5 min (6-s holding contraction, 10 s of relaxation, 3 rapid PFM contractions). Evaluations were conducted before, immediately after, and 5 min post-exercise, with measurements including inferior vena cava (IVC) diameters and pulsatility index, blood pressure, oxygen saturation, and heart rates. Two-way analysis of variance was performed for group and time comparisons in repeated measurements.

RESULTS: In both groups, the IVC collapsibility index values were lower 5 min after exercise, although this decrease, although clinically significant, did not reach statistical significance (p = 0.057). Post-exercise systolic blood pressure significantly decreased in both groups, whereas diastolic blood pressure decreased significantly in the pregnant group (p = 0.001, p = 0.023).

CONCLUSIONS: The study found no statistically significant changes in the collapsibility index of the IVC after PFME but observed a clinically suggestive decrease. The clinical decrease in the collapsibility index can be interpreted as PFME in the supine position increasing venous return. Additionally, PFME was found not to alter maternal and fetal heart rates but contributed to the decrease in maternal systolic and diastolic blood pressure. Our study supports the view that the acute effects of PFME neither induce fetal stress nor pose maternal risks.

PMID:38963506 | DOI:10.1007/s00192-024-05860-x

Int Urogynecol J. 2024 Jul 4. doi: 10.1007/s00192-024-05856-7. Online ahead of print.

ABSTRACT

INTRODUCTION AND HYPOTHESIS: Pregnancy is associated with an increase in pelvic floor dysfunction. Yoga, an ancient Indian practice involving asanas (physical postures), pranayam (breathing patterns) and meditation, can help women to control their pelvic floor muscles. However, the literature to support yoga as a remedy for pelvic floor dysfunction is lacking. We hypothesized that yoga could be an important method in improving pelvic floor dysfunction in pregnancy.

METHODS: In a randomised control study, 200 pregnant women matched for age, weight, parity and physical activity were randomised at the 13- to 20-week period of gestation into two groups: group I (n = 100, undergoing yoga therapy) and group II (n = 100, given usual antenatal care). A trained instructor provided two physical sessions, each lasting for 60 min and further online sessions for 5 days a week for 3 months. The Pelvic Floor Distress Inventory (PFDI-20) questionnaire was used to assess the primary outcome at recruitment, 32 weeks (antenatal), 1 week and 6 weeks post-partum in both groups.

RESULTS: In the 200 women randomised and matched for age and parity, there were no complications seen throughout the pregnancy and none of the patients was lost to follow-up in either group. The proportion of women exhibiting a decline in PFDI-20 scores was greater in group 1 (24%) than in group 2 (8%). The mean difference of scores between recruitment and 6 weeks post-partum was statistically significant (p value = 0.0026).

CONCLUSIONS: Yoga in pregnancy significantly improves pelvic floor dysfunction in an easy manner with no proven adverse effects.

PMID:38963502 | DOI:10.1007/s00192-024-05856-7

Clin Pharmacokinet. 2024 Jul 4. doi: 10.1007/s40262-024-01396-x. Online ahead of print.

ABSTRACT

BACKGROUND AND OBJECTIVE: Trough abiraterone concentration (ABI C_min) of 8.4 ng/mL has been identified as an appropriate efficacy threshold in patients treated for metastatic castration-resistant prostate cancer (mCRPC). The aim of the phase II OPTIMABI study was to evaluate the efficacy of pharmacokinetics (PK)-guided dose escalation of abiraterone acetate (AA) in underexposed patients with mCRPC with early tumour progression.

METHODS: This multicentre, non-randomised study consisted of two sequential steps. In step 1, all patients started treatment with 1000 mg of AA once daily. Abiraterone C_min was measured 22-26 h after the last dose intake each month during the first 12 weeks of treatment. In step 2, underexposed patients (C_min < 8.4 ng/mL) with tumour progression within the first 6 months of treatment were enrolled and received AA 1000 mg twice daily. The primary endpoint was the rate of non-progression at 12 weeks after the dose doubling. During step 1, adherence to ABI treatment was assessed using the Girerd self-reported questionnaire. A post-hoc analysis of pharmacokinetic (PK) data was conducted using Bayesian estimation of C_min from samples collected outside the sampling guidelines (22-26 h).

RESULTS: In the intention-to-treat analysis (ITT), 81 patients were included in step 1. In all, 21 (26%) patients were underexposed in step 1, and 8 of them (38%) experienced tumour progression within the first 6 months. A total of 71 patients (88%) completed the Girerd self-reported questionnaire. Of the patients, 62% had a score of 0, and 38% had a score of 1 or 2 (minimal compliance failure), without a significant difference in mean ABI C_min in the two groups. Four patients were enrolled in step 2, and all reached the exposure target (C_min > 8.4 ng/mL) after doubling the dose, but none met the primary endpoint. In the post-hoc analysis of PK data, 32 patients (39%) were underexposed, and ABI C_min was independently associated with worse progression-free survival [hazard ratio (HR) 2.50, 95% confidence interval (CI) 1.07-5.81; p = 0.03], in contrast to the ITT analysis.

CONCLUSION: The ITT and per-protocol analyses showed no statistical association between ABI underexposure and an increased risk of early tumour progression in patients with mCRPC, while the Bayesian estimator showed an association. However, other strategies than dose escalation at the time of progression need to be evaluated. Treatment adherence appeared to be uniformly good in the present study. Finally, the use of a Bayesian approach to recover samples collected outside the predefined blood collection time window could benefit the conduct of clinical trials based on drug monitoring. OPTIMABI trial is registered as National Clinical Trial number NCT03458247, with the EudraCT number 2017-000560-15).

PMID:38963459 | DOI:10.1007/s40262-024-01396-x

Neurourol Urodyn. 2024 Jul 4. doi: 10.1002/nau.25535. Online ahead of print.

ABSTRACT

OBJECTIVES: The objective of this study is to explore the functional connectivity (FC) of the cerebellum during the storage phase of micturition, through detecting spontaneous blood-oxygen-level dependent signal between the cerebellum and different brain regions using a high-resolution 7 Tesla magnetic resonance imaging (MRI) scanner.

MATERIALS AND METHODS: We recruited healthy individuals with no reported history of neurological disease or lower urinary tract (LUT) symptoms. Participants were asked to drink 500 mL of water and then empty their bladders before entering the MRI scanner. They underwent a T1-weighted anatomical scan, followed by an initial (8 min) empty bladder resting state functional MRI (rs-fMRI) acquisition. Once subjects felt the desire to void, a second rs-fMRI scan was obtained, this time with a full bladder state. We established a priori cerebellar regions of interest from the literature to perform seed-to-voxel analysis using nonparametric statistics based on the Threshold Free Cluster Enhancement method and utilized a voxel threshold of p < 0.05.

RESULTS: Twenty individuals (10 male and 10 female) with a median age of 25 years (IQR [3.5]) participated in the study. We placed 31 different 4-mm spherical seeds throughout the cerebellum and assessed their FC with the remainder of the brain. Three of these (left cerebellar tonsil, right posterolateral lobe, right posterior lobe) showed significant differences in connectivity when comparing scans conducted with a full bladder to those with an empty bladder. Additionally, we observed sex differences in FC, with connectivity being higher in women during the empty bladder condition.

CONCLUSION: Our initial findings reveal, for the first time, that the connectivity of the cerebellar network is modulated by bladder filling and is associated with LUT function. Unraveling the cerebellum’s role in bladder function lays the foundation for a more comprehensive understanding of urinary pathologies affecting this area.

PMID:38962955 | DOI:10.1002/nau.25535

Diabetes Obes Metab. 2024 Jul 4. doi: 10.1111/dom.15762. Online ahead of print.

ABSTRACT

AIM: To investigate the associations of body mass index (BMI), waist circumference (WC) and the weight-adjusted waist index (WWI) with the impairment of activities of daily living (ADL) in older Chinese people.

METHODS: A total of 13 260 participants aged 65 years and older from the 2018 Chinese Longitudinal Healthy Longevity Survey were included in this cross-sectional study. BMI, WC and the WWI were calculated from measurements of height, weight and WC. Binary logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (95% CIs). Non-linear correlations were investigated using restricted cubic spline curves.

RESULTS: In multivariate logistic regression fully adjusted for confounding variables, our analyses revealed significant associations between WC and WWI and ADL impairment, with adjusted ORs (95% CI) of 1.01 (1.00, 1.01) and 1.08 (1.03, 1.12), respectively. Meanwhile, participants with a high WWI had a higher risk of ADL impairment compared with those with a low WWI, with an adjusted OR (95% CI) of 1.12 (1.02, 1.23). Subgroup analyses showed that only the association between WWI and ADL impairment did not differ in any of the different populations. In addition, we found that BMI, WC and WWI were non-linearly associated with ADL impairment.

CONCLUSIONS: There are significant associations between WC and WWI and ADL impairment in older Chinese people. The findings show the ability of the WWI to serve as a comprehensive and effective indicator of obesity in older Chinese people and emphasize the importance of assessing WWI in screening and preventing ADL impairment in older people.

PMID:38962934 | DOI:10.1111/dom.15762

J Periodontal Res. 2024 Jul 4. doi: 10.1111/jre.13321. Online ahead of print.

ABSTRACT

AIM: To evaluate whether the ribosome-crosslinked collagen membrane (RCCM) is non-inferior to the natural collagen membrane (NCM) used in regeneration surgery in terms of clinical attachment level (CAL) gain at 6 months.

METHODS: Eighty patients diagnosed as generalized periodontitis presenting with isolated infrabony defect (≥4 mm deep) were enrolled and randomized to receive regenerative surgery, either with NCM or RCCM, both combined with deproteinized bovine bone mineral (DBBM). CAL, pocket probing depth (PPD), and gingival recession (GR) were recorded at baseline, 3, and 6 months postoperatively. Periapical radiographs were taken at baseline, immediately, and 6 months after surgery. Early wound healing index (EHI) and patients’ responses were recorded at 2 weeks postoperatively.

RESULTS: At 6 months post-surgery, the mean CAL gain was 3.1 ± 1.5 mm in the NCM group and 2.9 ± 1.5 mm in the RCCM group, while the mean PPD was 4.3 ± 1.1 mm in the NCM group and 4.2 ± 1.0 mm in the RCCM group. Both groups demonstrated a statistically significant improvement from the baseline (p < .01). RCCM was non-inferior to NCM concerning the primary outcome (CAL gain at 6 months). The GR at 6 months postoperatively was 1.3 ± 1.2 and 1.2 ± 1.1 mm, which showed no difference compared with baseline. At 6 months follow-up, the radiographic linear bone fill (RLBF) was 6.5 ± 2.8 and 5.5 ± 2.6 mm (p > .05), while the bone fill percentage (BF%) was 102.3 ± 53.5% and 92.3 ± 40.1% (p > .05), in the NCM and RCCM groups, respectively. There was no significant difference in EHI and postoperative responses between two groups.

CONCLUSION: RCCM + DBBM resulted in no-inferior clinical and radiographic outcomes to NCM + DBBM for the treatment of isolated infrabony defect in 6 months.

PMID:38962931 | DOI:10.1111/jre.13321

Hong Kong Med J. 2024 Jun;30 Suppl 3(3):20-22.

NO ABSTRACT

PMID:38962918