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Article: Tunable structure of TiO

Hernández-Rodríguez, F A / Garza-Hernández, R / Alfaro-Cruz, M R / Torres-Martínez, Leticia M

2024 Volume 10, Issue 6, Page(s) e27359

Abstract: ... ...

Abstract	TiO
Language	English
Publishing date	2024-03-05
Publishing country	England
Document type	Journal Article
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2024.e27359
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Article ; Online: Tricavitary effusion in a 3-year-old intact female Labrador Retriever.

Braz, Larissa A do N / Goes, Letícia S / Santana, Aureo E / Cruz, Nathan da R N / Barros, Jessica C de / Junior, Daniel P

Journal of the American Veterinary Medical Association

2023 Volume 261, Issue 8, Page(s) 1–3

MeSH term(s)	Animals ; Dogs ; Female ; Body Fluids ; Dog Diseases/diagnostic imaging
Language	English
Publishing date	2023-03-22
Publishing country	United States
Document type	Journal Article
ZDB-ID	390811-2
ISSN	1943-569X ; 0003-1488
ISSN (online)	1943-569X
ISSN	0003-1488
DOI	10.2460/javma.23.01.0042
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Article ; Online: Determination of the discriminant doses to identify resistance to fipronil, flumethrin and coumaphos, in Rhipicephalus sanguineus s.l. (Acari: Ixodidae) from Mexico.

Martínez-Ibañez, Francisco / Cruz-Vázquez, Carlos / Lagunes-Quintanilla, Rodolfo / Vitela-Mendoza, Irene / Medina-Esparza, Leticia / Chávez-Rodríguez, Arturo M

Experimental & applied acarology

2023 Volume 91, Issue 2, Page(s) 331–338

Abstract: ... resistance against three ixodicides - fipronil, flumethrin and coumaphos - in R. sanguineus s.l. larvae ... were identified as R. sanguineus s.l. They were incubated for 25 days and their progeny was used ...

Abstract	Rhipicephalus sanguineus s.l. is an intra- and peridomiciliary tick of medical and veterinary importance, whose control is carried out through the application of various ixodicides, to which it can develop resistance. The objective of this work was to determine the discriminant doses (d.d.) to identify resistance against three ixodicides - fipronil, flumethrin and coumaphos - in R. sanguineus s.l. larvae originating from Mexico. Engorged ticks were collected from naturally infested dogs residing in rural communities in five Mexican states; the dogs had no history of recent treatment with ixodicides. All ticks were identified as R. sanguineus s.l. They were incubated for 25 days and their progeny was used in the larval package test (LPT) to be exposed to d.d. as determined in Rhipicephalus microplus, and those that were susceptible were analyzed using the LPT with six concentrations, for fipronil from 0.1 to 0.003125%, for flumethrin from 0.02 to 0.000625% and for coumaphos from 0.4 to 0.0125%. Mortality was analyzed with Probit methodology, to calculate the 50 and 99% lethal concentrations (LC50 and LC99). The d.d. was determined as a consensus value by multiplying the LC99 value × 2. Nine double susceptible samples (fipronil + flumethrin) and one triple susceptible sample (fipronil + flumethrin + coumaphos) were found; the d.d. determined were fipronil 0.05%, flumethrin 0.01% and coumaphos 0.43%. These doses can be used to rapidly and inexpensively identify resistant populations in samples collected in the field.
Language	English
Publishing date	2023-09-26
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	11320-7
ISSN	1572-9702 ; 0168-8162
ISSN (online)	1572-9702
ISSN	0168-8162
DOI	10.1007/s10493-023-00836-w
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Article ; Online: MgO and Mg(OH)₂ thin films prepared by the SILAR method and their CO₂ photocatalytic performance

Cruz, M. R. Alfaro / Luévano-Hipólito, E. / Garza-Hernández, R. / Torres-Martínez, Leticia M.

J Mater Sci. 2022 Oct., v. 57, no. 40, p. 18739-18753

2022 , Page(s) 18739–18753

Abstract: CO₂ photoconversion to solar fuels requires materials with a high affinity to the acidic CO₂, and MgO and Mg(OH)₂ films represent good candidates due to their basic sites are highly active for CO₂ capture in a wide interval of temperatures. However, the ... ...

Abstract	CO₂ photoconversion to solar fuels requires materials with a high affinity to the acidic CO₂, and MgO and Mg(OH)₂ films represent good candidates due to their basic sites are highly active for CO₂ capture in a wide interval of temperatures. However, the deposition of MgO and Mg(OH)₂ as thin film is difficult to obtain by traditional methods. As an alternative, in this work, the successive ionic layer adsorption and reaction (SILAR) method is proposed to obtain MgO/Mg(OH)₂ mixtures over glass substrates at significantly lower temperatures (200–400 °C). The films were tested as photocatalysts in the CO₂ photoconversion to solar fuels (HCOOH and CH₃OH) under UV–visible-NIR irradiation. The as-prepared films exhibited the hexagonal structure of the Mg(OH)₂ phase. As the temperature increased, XRD and XPS analysis confirmed the presence of orthorhombic MgO, while the morphology remains with similar grains with an estimated size of 1 µm. The annealing temperatures change the chemical species (Mg–O, Mg–OH, and Mg–CO₃) on the films affected their photocatalytic activity. The films exhibited high affinity for CO₂ due to the presence of defects (F and F⁺ centers) in both phases. The photocatalytic behavior was directly related to OH⁻ species present in each sample. According to the results, it seems that fewer hydroxides and defects on the films favored higher efficiencies for the CO₂ photoconversion. In addition, the films were exposed to accelerated weathering tests to evaluate their efficiency for more extended periods. The results indicated that the aged films still have activity for CO₂ photoconversion.
Keywords	adsorption ; carbon dioxide ; chemical species ; films (materials) ; glass ; irradiation ; photocatalysis ; photocatalysts ; temperature
Language	English
Dates of publication	2022-10
Size	p. 18739-18753
Publishing place	Springer US
Document type	Article ; Online
ZDB-ID	2015305-3
ISSN	1573-4803 ; 0022-2461
ISSN (online)	1573-4803
ISSN	0022-2461
DOI	10.1007/s10853-022-07837-x
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Article ; Online: Analyzing the Effects of Silica Nanospheres on the Sol-Gel Transition Profile of Thermosensitive Hydrogels.

Ribeiro, Lucas S / Sala, Renata L / de Jesus, Leticia A O / Cruz, Sandra A / Camargo, Emerson R

Langmuir : the ACS journal of surfaces and colloids

2021 Volume 37, Issue 24, Page(s) 7373–7379

Abstract: The insertion of nanoparticles into smart hydrogels can diversify their functionalities by a synergistic combination of the components properties within the hydrogels. While these hybrid systems are attractive to the biomaterials field, careful design ... ...

Abstract	The insertion of nanoparticles into smart hydrogels can diversify their functionalities by a synergistic combination of the components properties within the hydrogels. While these hybrid systems are attractive to the biomaterials field, careful design and control of their properties are required since the new interactions between the polymer and the nanoparticles can result in changes or the loss of hydrogels stimuli response. In order to understand the physicochemical aspects of the thermoresponsive systems, nanocomposites of poly(
MeSH term(s)	Hydrogels ; Nanocomposites ; Nanospheres ; Polymers ; Silicon Dioxide ; Temperature
Chemical Substances	Hydrogels ; Polymers ; Silicon Dioxide (7631-86-9)
Language	English
Publishing date	2021-06-08
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.1c00723
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Article ; Online: Hydrogel Containing Silibinin-Loaded Pomegranate Oil-Based Nanocapsules for Cutaneous Application: In Vitro Safety Investigation and Human Skin Biometry and Permeation Studies.

Marchiori, Marila C L / Rigon, Cristina / da S Jardim, Fernanda / Giuliani, Laura M / Copetti, Priscila M / Sagrillo, Michele R / Ourique, Aline F / Cruz, Letícia

AAPS PharmSciTech

2023 Volume 24, Issue 6, Page(s) 138

Abstract: In previous studies, we developed a hydrogel formulation containing silibinin-loaded pomegranate oil nanocapsules (HG-NCSB) that had improved in vivo anti-inflammatory action in comparison to non-encapsulated silibinin. To determine skin safety and ... ...

Abstract	In previous studies, we developed a hydrogel formulation containing silibinin-loaded pomegranate oil nanocapsules (HG-NCSB) that had improved in vivo anti-inflammatory action in comparison to non-encapsulated silibinin. To determine skin safety and whether the nanoencapsulation influences silibinin skin permeation, NCSB skin cytotoxicity, HG-NCSB permeation in human skin, and a biometric study with healthy volunteers were conducted. The formulation of nanocapsules was prepared by the preformed polymer method while the HG-NCSB was obtained by thickening the suspension of nanocarriers with gellan gum. The cytotoxicity and phototoxicity of nanocapsules were assessed in Keratinocytes (HaCaT) and fibroblast (HFF-1) using the MTT assay. The hydrogels were characterized regarding the rheological, occlusive, and bioadhesive properties, and silibinin permeation profile in human skin. The clinical safety of HG-NCSB was determined by cutaneous biometry in healthy human volunteers. NCSB yielded better cytotoxicity results than the blank nanocapsules (NCPO). NCSB did not cause photocytotoxicity, while NCPO and the non-encapsulated substances (SB and pomegranate oil) were phototoxic. The semisolids presented non-Newtonian pseudoplastic flow, adequate bioadhesiveness, and low occlusive potential. The skin permeation demonstrated that HG-NCSB retained a higher SB amount in the outermost layers than HG-SB. In addition, HG-SB reached the receptor medium and had a superior concentration of SB in the dermis layer. In the biometry assay, there was no significant cutaneous alteration after the administration of any of the HGs. Nanoencapsulation promoted greater SB retention in the skin, averted percutaneous absorption, and made the topical use of SB and pomegranate oil safer.
MeSH term(s)	Humans ; Nanocapsules ; Silybin ; Hydrogels ; Pomegranate ; Skin ; Biometry
Chemical Substances	Nanocapsules ; Silybin (4RKY41TBTF) ; Hydrogels
Language	English
Publishing date	2023-06-22
Publishing country	United States
Document type	Journal Article
ZDB-ID	2052070-0
ISSN	1530-9932 ; 1530-9932
ISSN (online)	1530-9932
ISSN	1530-9932
DOI	10.1208/s12249-023-02606-8
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Article ; Online: Transdermal release of methotrexate by cationic starch/poly(vinyl alcohol)-based films as an approach for rheumatoid arthritis treatment.

Nornberg, Andressa B / Martins, Carolina C / Cervi, Verônica F / Sari, Marcel H M / Cruz, Letícia / Luchese, Cristiane / Wilhelm, Ethel A / Fajardo, André R

International journal of pharmaceutics

2021 Volume 611, Page(s) 121285

Abstract: Methotrexate (MTX) is a common drug used for rheumatoid arthritis (RA) treatment; however, a series of adverse effects associated with its oral or subcutaneous administration is reported. Transdermal delivery of MTX is an alternative to abate these ... ...

Abstract	Methotrexate (MTX) is a common drug used for rheumatoid arthritis (RA) treatment; however, a series of adverse effects associated with its oral or subcutaneous administration is reported. Transdermal delivery of MTX is an alternative to abate these issues, and the use of drug delivery systems (DDS) based on polymeric films presents an impressive potential for this finality. Based on this, in this study, we report the preparation of films made by cationic starch (CSt), poly(vinyl alcohol) (PVA), and chondroitin sulfate (ChS) to incorporate and release MTX, as well as the in vivo evaluation in model of rheumatoid arthritis in mice. CSt/PVA and CSt/PVA/ChS-based films (with and without MTX) were prepared using a simple protocol under mild conditions. The films loaded with 5 w/w-% of MTX exhibited appreciable drug loading efficiency and distribution. The MTX permeation through the layers of porcine skin demonstrated that most of the drug permeated was detected in the medium, suggesting that the formulation can provide a systemic absorption of the MTX. In vivo studies performed in an arthritis-induced model in mice demonstrated that the MTX-loaded films were able to treat and attenuate the symptoms and the biochemical alterations related to RA (inflammatory process, oxidative stress, and nociceptive behaviors). Besides, the pharmacological activity of MTX transdermally delivery by the CSt/PVA and CSt/PVA/ChS films was comparable to the MTX orally administered. Based on these results, it can be inferred that both films are prominent materials for incorporation and transdermal delivery of MTX in a practical and non-invasive manner.
MeSH term(s)	Animals ; Arthritis, Rheumatoid/drug therapy ; Cations ; Methotrexate ; Mice ; Polyvinyl Alcohol ; Starch
Chemical Substances	Cations ; Polyvinyl Alcohol (9002-89-5) ; Starch (9005-25-8) ; Methotrexate (YL5FZ2Y5U1)
Language	English
Publishing date	2021-11-11
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	428962-6
ISSN	1873-3476 ; 0378-5173
ISSN (online)	1873-3476
ISSN	0378-5173
DOI	10.1016/j.ijpharm.2021.121285
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Article: Penile shape discriminates two cryptic species of

Campana, Leonardo / Cruz, Letícia Rosário / Paresque, Roberta / Fagundes, Valéria

ZooKeys

2022 Volume 1134, Page(s) 1–22

Abstract: Glans penis morphology has been used as a powerful tool in mammal taxonomy to differentiate cryptic species. Neotropical rodent ... ...

Abstract	Glans penis morphology has been used as a powerful tool in mammal taxonomy to differentiate cryptic species. Neotropical rodent species
Language	English
Publishing date	2022-12-05
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2445640-8
ISSN	1313-2970 ; 1313-2989
ISSN (online)	1313-2970
ISSN	1313-2989
DOI	10.3897/zookeys.1134.89587
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Article ; Online: Leptin receptor and prolactin in pubertal disorders and chronic kidney disease.

Villasís-Keever, Miguel A / Zurita-Cruz, Jessie N / Serret-Montoya, Juana / Zepeda-Martinez, Claudia Del Carmen / Alegria-Torres, Gabriela / Barradas-Vazquez, Aly S / Hernández-Hernández, Beatriz C / Alonso-Flores, Sara R / Manuel-Apolinar, Leticia / Damasio-Santana, Leticia

Pediatrics international : official journal of the Japan Pediatric Society

2022 Volume 64, Issue 1, Page(s) e15183

Abstract: Background: Knowledge of chronic kidney disease (CKD) with pubertal disorders (PD) in adolescent boys is limited as few studies have explored this disorder. This study aimed to identify the usefulness of assessing hormonal parameters in male adolescents ...

Abstract	Background: Knowledge of chronic kidney disease (CKD) with pubertal disorders (PD) in adolescent boys is limited as few studies have explored this disorder. This study aimed to identify the usefulness of assessing hormonal parameters in male adolescents with CKD and their correlation with PD in a 12-month follow-up period. Methods: A prospective cohort study was conducted among male adolescents with CKD (stages IV and V). Data regarding the age at puberty onset were collected from the patients' clinical records and through interview. The patients were followed up for 12 months during their pubertal development. At the beginning, routine hormonal profile tests were performed to examine the patients' thyroid profile, prolactin levels, luteinizing hormone, follicle-stimulating hormone, testosterone, leptin, and receptor leptin. The hormonal profiles of patients with and without PD were compared. Comparisons between the groups were performed using the Student t-test and Fisher's exact tests. Logistic regression analysis was also performed. Results: Data of 64 patients (26/64 with PD) were analyzed. The median age was 15 years and the median time for CKD evolution was 11 months. No differences between groups were noted in the general or biochemical characteristics of the patients. The hormonal parameters, prolactin levels were higher and the free leptin and free thyroxine levels were lower in patients with PD. Leptin receptor levels of >0.90 ng/mL (risk ratio [RR], 8.6; P = 0.004) and hyperprolactinemia (RR, 21.3; P = 0.049) were the risk factors for PD. Conclusions: Leptin receptor levels of >0.90 ng/mL and hyperprolactinemia are associated with the development of PD in male adolescents with CKD.
MeSH term(s)	Adolescent ; Humans ; Male ; Receptors, Leptin ; Prolactin ; Leptin ; Hyperprolactinemia/complications ; Prospective Studies ; Puberty ; Renal Insufficiency, Chronic/complications
Chemical Substances	Receptors, Leptin ; Prolactin (9002-62-4) ; Leptin
Language	English
Publishing date	2022-11-08
Publishing country	Australia
Document type	Journal Article
ZDB-ID	1470376-2
ISSN	1442-200X ; 1328-8067
ISSN (online)	1442-200X
ISSN	1328-8067
DOI	10.1111/ped.15183
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Article: Analyzing the Effects of Silica Nanospheres on the Sol–Gel Transition Profile of Thermosensitive Hydrogels

Ribeiro, Lucas S. / Sala, Renata L. / de Jesus, Leticia A. O. / Cruz, Sandra A. / Camargo, Emerson R.

Langmuir. 2021 June 08, v. 37, no. 24

2021

Abstract	The insertion of nanoparticles into smart hydrogels can diversify their functionalities by a synergistic combination of the components properties within the hydrogels. While these hybrid systems are attractive to the biomaterials field, careful design and control of their properties are required since the new interactions between the polymer and the nanoparticles can result in changes or the loss of hydrogels stimuli response. In order to understand the physicochemical aspects of the thermoresponsive systems, nanocomposites of poly(N-vinylcaprolactam) (PNVCL) and silica nanoparticles with different sizes and concentrations were synthesized. The UV–vis and DLS techniques showed that the PNVCL has a sharp phase transition at 34 °C, while the nanocomposites have a diffuse transition. The nanocomposites showed an initial coil–globule transition before the phase transition takes place. This was identified by the evolution of the hydrodynamic diameter of the nanocomposite globules before the cloud point temperature (Tcₚ), which remained constant for PNVCL. This new transition profile can be described by two stages in which microscopic volume transitions occur first, followed by the macroscopic transition that forms the hydrogel. These results show that the proposed nanocomposites can be designed to have tunable stimuli response to smaller temperature variations with the formation of intermediate globule states.
Keywords	biocompatible materials ; evolution ; hydrodynamics ; hydrogels ; nanocomposites ; nanospheres ; phase transition ; polymers ; silica ; temperature ; thermosensitivity
Language	English
Dates of publication	2021-0608
Size	p. 7373-7379.
Publishing place	American Chemical Society
Document type	Article
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.1c00723
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