Adriana Martinez-Cuazitl

Thyroid cancer is the most common endocrine malignancy. Two‐trace two‐dimensional Fourier transform infrared spectroscopy (2T2D‐FTIR) shows great promise in cancer research by providing detailed molecular information that helps distinguish tumor types and stages. In this study, we used 2T2D‐FTIR combined with machine learning (ML) to diagnose thyroid cancer across different population groups. The study population was divided into three groups: G1 (20–40 ± 2 years, female), G2 (45–60 ± 2 years, male and female), and G3 (65–80 ± 2 years, female). This advanced technique enhances the comparison between healthy and malignant tissues by detecting subtle molecular changes in two‐dimensional space. Our findings support the use of 2T2D‐FTIR combined with ML for early thyroid cancer detection, and possibly for other cancers as well. The study had a limited sample size due to ethical and availability constraints; however, the ML approach improved accuracy and could potentially achieve better results with larger datasets.

Introduction: Rhinosinusitis is a significant health issue that parallels the increasing prevalence of allergic rhinitis. We aimed to investigate the biochemical, inflammatory, and immunological components involved in the topical glucocorticoid (GC) response in chronic rhinosinusitis with nasal polyps (CRSwNP) using Fourier transform infrared microspectroscopy (FTIRM). Methods: We analyzed nasal mucosa (NM) from healthy individuals ( n = 10) and patients diagnosed with CRSwNP ( n = 20) using FTIRM. For this purpose, cryosections of the NM biopsies were obtained, and the epithelium and connective tissues were analyzed separately, thereby identifying the main biomolecules and components associated with inflammatory and immune responses. Results: The most common reported signs and symptoms were nasal obstruction, rhinorrhea, and frontal headache, with allergic rhinitis as the main comorbidity. FTIRM spectra showed no statistically significant differences in structural or biochemical composition between CRSwNP and healthy groups in either the epithelium or connective tissue sections. Notably, absorbance bands related to phosphodiester bonds, phosphorylated molecules, and IL‐6, IL‐10, and IFN‐γ were elevated in the epithelium region of the CRSwNP group, indicating enhanced inflammatory and immune responses. In contrast, in the connective tissue region, most inflammatory components, except IL‐6 and IFN‐γ, exhibited lower absorbance in the CRSwNP group, highlighting regional differences in biomolecular response. Conclusion: TNF‐α and IgA were identified as the principal biomarkers most affected by GC treatment in the CRSwNP group, underscoring their potential as indicators of treatment response.

Background: Due to the COVID-19 pandemic, randomized clinical studies were conducted with Remdesivir in combination with Bariticinib or Dexamethasone, which have shown effectiveness for the treatment of COVID-19. Objective: We analyzed the effect of co-treatment with Remdesivir in a retrospective in Mexico. Methods: Thirty-four patients treated with Remdesivir in combination with Baricitinib or Dexamethasone were included. Age, sex, comorbidities, signs, and symptoms were recorded at hospital admission, intubation needs, intensive care unit (ICU) requirements, days of hospital stay and their evolution, as well as laboratory data upon admission and upon admission terminate Remdesivir treatment. Results: Most were male, with an age of 56.5 years (49 years-60.3 years), whose main comorbidity was obesity. The main symptoms on admission were dyspnea and cough. Thirty-two patients received the short Remdesivir regimen, 22 were co-treated with Baricitinb and 12 with Dexamethasone. Most did not require ICU care, 9 patients died, 19% of those co-treated with Baricitinib and 42% of those co-treated with Dexamethasone. A significant decrease in hemoglobin, protein, albumin and LDH levels was observed. Conclusion: In this study, we observed lower mortality in patients co-treated with Baricitinib vs those co-treated with Dexamethasone, and a hospital stay similar to that reported in randomized clinical studies.

Gold nanoparticles (AuNPs) have been used in a wide range of applications, conferring to bio-molecules diverse properties such as delivery, stabilization, and reduction of the adverse effects of drugs or plant extracts. Polyphenolic compounds from Bacopa procumbens (B. procumbens) (BP) can modulate proliferation, adhesion, migration, and cell differentiation, reducing the artificial scratch area in fibroblast cultures and promoting wound healing in an in vivo model. Here, chemically synthesized AuNPs conjugated with BP (AuNP-BP) were characterized using UV-Vis, ATR-FTIR, DLS, zeta-potential, and TEM analysis. The results showed an overlap of the FTIR spectra of the polyphenolic compounds from B. procumbens adhered to the surface of the AuNPs. UV-vis analysis indicated that the average size of the AuNP-BP was 28 nm, while DLS analysis showed a size of 44.58 nm and, by TEM, a size of 16.5 nm with an icosahedral morphology was observed. These measurements suggest an increase in the size of the nanoparticles after conjugation with BP, compared to the sizes of 9 nm, 44.51 nm, and 14.17 nm for the unconjugated AuNPs, respectively. Furthermore, the zeta potential of the AuNPs, which was originally −36.3 ± 12.3 mV shifted to −18.2 ± 7.02 mV after conjugation with BP, indicating improved stability of the nanoparticles. Enhancement of the wound healing effect was evaluated by morphometric, histochemical, and FTIR changes in a rat wound excision model. Results showed that the nanoconjugation process reduced the BP concentrations by 100-fold to have the same wound healing effect as BP alone. Besides, histological and FTIR spectroscopy analyses demonstrated that AuNP-BP treatment exhibited better macroscopical performance, showing a reduction in inflammatory cells and an increased synthesis and improved organization of collagen fibers.

There is a growing trend in using saliva for SARS-CoV-2 detection with reasonable accuracy. We have studied the responses of IgA, IgG, and IgM in human sal

Gold nanoparticles (AuNPs) have been used in a broad range of applications conferring to bio-molecules diverse proprieties such as deliver, stabilization and reduction of adverse effects of drugs or plant ex-tracts. Polyphenolic compounds from Bacopa procumbens (BP) are able to modulate proliferation, adhesion, migration and cell differentiation, reducing artificial scratch area in fibroblast cultures and promoting wound healing in in vivo model. Here, chemically synthetized AuNPs conjugated with BP (AuNP-BP) were characterized by Uv-Vis, ATR-FTIR, DLS and zeta-potential. Results showed over-lapping FTIR spectra of polyphenolic compounds from B. procumbens capping the AuNPs, stable size by the DLS and zeta potential, AuNP-BP was 44.58 nm, the zeta-potential of AuNPs was -36.3±12.3 mV after conjugation with the BP; - (AuNP-BP), the zeta-potential was reduced to -18-2±7.02 mV. Enhancement of wound healing effect were evaluated by morphometric, histochemical and FTIR changes in rat wound excision model. Results showed that the nanoconjugation process reduced 100 folds BP concentrations to have the same wound healing effect of BP alone. Besides histological and FTIR spec-troscopy analyses, demonstrated that AuNP-BP treatment displayed better macroscopical performance; the reduction on inflammatory cells, and the increased synthesis and better organization of collagen fibers.

Diabetes is a chronic degenerative disease that carries multiple complications. One of the most important complications is the diabetic cutaneous complications, such as skin lesions, ulcerations, and diabetic foot, which are present in 30%–70% of the patients. Currently, the treatments for wound healing include growth factors and cytokines, skin substitutes, hyperbaric oxygen therapy, and skin grafts. However, these treatments are ineffective due to the complex mechanisms involved in developing unhealed wounds. Considering the aforementioned complications, regenerative medicine has focused on this pathology using stem cells to improve these complications. However, it is essential to mention that there is a poor biomolecular understanding of diabetic skin and the effects of treating it with stem cells. For this reason, herein, we investigated the employment of pluripotent stem cells (PSC) in the wound healing process by carrying out morphometric, histological, and Fourier-transform infrared microspectroscopy (FTIRM) analysis. The morphometric analysis was done through a photographic follow-up, measuring the lesion areas. For the histological analysis, hematoxylin & eosin and picrosirius red stains were used to examine the thickness of the epidermis and the cellularity index in the dermis as well as the content and arrangement of collagen type I and III fibers. Finally, for the FTIRM analysis, skin cryosections were obtained and analyzed by employing a Cassegrain objective of 16× of an FTIR microscope coupled to an FTIR spectrometer. For this purpose, 20 mice were divided into two groups according to the treatment they received: the Isotonic Salt Solution (ISS) group and the PSCs group (n = 10). Both groups were induced to diabetes, and six days after diabetes induction, an excisional lesion was made in the dorsal area. Furthermore, using microscopy and FTIRM analysis, the skin healing process on days 7 and 15 post-skin lesion excision was examined. The results showed that the wound healing process over time, considering the lesion size, was similar in both groups; however, the PSCs group evidenced hair follicles in the wound. Moreover, the histological analysis evidenced that the PSCs group exhibited granulation tissue, new vessels, and better polarity of the keratinocytes. In addition, the amount of collagen increased with a good deposition and orientation, highlighting that type III collagen fibers were more abundant in the PSCs. Finally, the FTIR analysis evidenced that the PSCs group exhibited a faster wound healing process. In conclusion, the wounds treated with PSCs showed a more rapid wound healing process, less inflammatory cellular infiltration, and more ordered structures than the ISS group.