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This study explores the complexities of interpreting single drug exposure in hair, emphasizing factors like drug distribution variability and suggests methods to validate single exposure findings in forensic cases.

This study presents additional data suggesting that the absence of nerve endings in certain segments of human hair follicles influences the asymmetrical distribution of electrical charges, as indicated by no precipitation of Potassium Ferricyanide crystals.

This study found that concentrations of THCCOOH in hair do not correlate well with self-reported cannabis use due to inaccuracies in the self-reported data, but it provides preliminary insights into usage patterns.

This study found that hair testosterone concentrations show some consistency over time, but factors like hair washing and individual growth rates influence these levels, suggesting the need for careful sampling and analysis adjustments.

This study suggests that damaged anagen hair follicles have the capability to repair themselves and resume growth by mobilizing extra-bulge epithelial cells, particularly after injuries like chemotherapy and radiotherapy.

This study found low concordance between distal and proximal hair cortisol concentrations during early pregnancy, particularly when measured with different assay methods.

In this study, researchers developed an LC-MS/MS method to accurately quantify cortisone and cortisol levels in human scalp hair, finding that concentrations decrease predictably along the hair shaft, which could assist in identifying abnormal glucocorticoid exposure.

The researchers reported that certain physical characteristics of hair shafts, such as length and color, may influence mtDNA read counts and degradation state when analyzed by massively parallel sequencing.

This review discusses the regulation of involucrin gene expression, focusing on transcription factors and signaling pathways, and reports no new experimental findings.

This study found that hair from the vertex posterior is a reliable sampling region for detecting zolpidem intake, showing consistent drug concentration and peak position compared to other scalp regions.

This study observed that ethyl glucuronide (EtG) concentrations in hair decreased significantly during an abstinent period, suggesting possible wash-out effects or other factors affecting EtG levels.

This study observed that testosterone concentrations in hair segments show some stability over time, but are influenced by factors like sebum integration, hair washing frequency, and individual hair growth rates.

This review discusses micro-segmental hair analysis for forensic toxicology, emphasizing its potential to provide detailed drug distribution profiles and its application in investigations, while noting the method's limitations and future perspectives.

This case study reports clinical improvement and complete ulcer resolution in a 29-year-old woman with ANA-negative SLE treated for segmental hyalinizing vasculitis and valvular heart disease.

Proximal hair cortisol is a reliable tool for diagnosing Cushing's Syndrome.

This study suggests that cortisol measured in human hair can effectively reflect increased production for up to six months, but its retrospective accuracy may be limited due to rapid decline in levels.

This article discusses the presentation of chemotherapy-induced anagen effluvium as either diffuse or patterned hair loss and reports no new clinical findings.

This study explored the localization of phenolsulphotransferase in human embryonic and fetal kidneys, finding distinct patterns of PST immunoreactivity in developing mesonephric and metanephric structures over time.

In this study, trichoscopic features aiding differential diagnosis of alopecia in Korean patients were found to be similar to those in Caucasians, but pigment pattern frequencies differed due to racial characteristics.

Minoxidil lowers blood pressure, increases heart rate, and improves blood flow in dogs.

This study found that hair cortisol concentration is a promising stress indicator in cattle but not in pigs, where external factors and lower cortisol response may interfere with its validity.

This paper considers fibrodysplasia ossificans progressiva as a segmental progeroid syndrome, which may help uncover mechanisms of normal aging and suggest targets for new treatments.

This study observed that eliminating positional error in hair segment analysis can improve understanding of changes in isotopic composition, aiding the identification of pathological conditions and dietary patterns.

This study found that metabolite levels in hair samples differ significantly by hair color and segment, leading to recommendations for best practices in hair metabolomic studies.

This study suggests that minoxidil may serve as a suitable reference drug for high permeability classification in the Biopharmaceutics Classification System due to its consistent permeability across different intestinal segments and pH levels.

This study suggests that myotonic dystrophies may qualify as segmental progeroid disorders due to molecular and clinical similarities with typical progeroid syndromes.

This study suggests that measuring cortisol levels in hair may serve as a useful biomarker for assessing mood in individuals with bipolar disorder over recent months.

In this research, LEF1 was identified as a crucial transcription factor for submucosal gland development in mouse and ferret tracheas, though it requires other factors to induce gland formation.

This review examines the main absorption sites and influencing factors for orally administered drugs, highlighting variables such as solubility and gastrointestinal conditions that affect drug absorption in the small intestine and the development of effective drug delivery systems.

This study demonstrated that a mechanical-assisted post-bioprinting strategy significantly increased cell numbers and enhanced regenerative capabilities in hollow hydrogel-based scaffolds for bone defect repair in vivo.