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1.
Sex Med Rev ; 2024 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-38456235

RESUMO

INTRODUCTION: Penile induration disease, commonly known as Peyronie's disease (PD), is a connective tissue disorder that affects the penis, leading to the development of fibrous plaques, penile curvature, and erectile dysfunction. PD is a common male reproductive system disease with a complex etiology involving multiple genes, signaling pathways, and different phenotypes. OBJECTIVES: The etiology and pathogenesis of PD remain poorly understood, hindering the development of effective treatment strategies. By understanding the underlying mechanisms of PD, we can pave the way for targeted therapies and improved patient outcomes. METHODS: We reviewed the epidemiology and pathophysiology of PD. We performed database searches on Google Scholar, PubMed, Medline, and Web of Science from inception to September 2023. The literature reviewed included priapism guidelines, review articles, current trial studies, and various literature related to PD. RESULTS: This article provides a comprehensive overview of the current research progress on the disease, focusing on its genetic factors, signaling pathways, cellular mechanisms, phenotypic manifestations, and therapeutic targets. It can help identify individuals at higher risk, aid in early detection and intervention, and provide insights into fibrosis and tissue remodeling. It can also reveal potential therapeutic targets, guide accurate diagnoses and treatment strategies, and address the impact of the disease on patients' quality of life. CONCLUSION: By integrating insights from genomics, molecular pathways, clinical phenotypes, and therapeutic potentials, our research aims to achieve a deeper and more comprehensive understanding of PD, propelling the field toward innovative strategies that enhance the lives of those affected by PD. The complex manifestations and pathogenesis of PD necessitate the use of multiple treatment methods for personalized care.

2.
Microsyst Nanoeng ; 9: 152, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38033990

RESUMO

It is important to monitor the intra-/extracellular concentration of hydrogen peroxide (H2O2) in biological processes. However, miniaturized devices that enable portable and accurate H2O2 measurement are still in their infancy because of the difficulty of developing facile sensing strategies and highly integrated sensing devices. In this work, portable H2O2 sensors based on Pt-Ni hydrogels with excellent peroxidase-like and electrocatalytic activities are demonstrated. Thus, simple and sensitive H2O2 sensing is achieved through both colorimetric and electrochemical strategies. The as-fabricated H2O2 sensing chips exhibit favorable performance, with low detection limits (0.030 µM & 0.15 µM), wide linearity ranges (0.10 µM-10.0 mM & 0.50 µM-5.0 mM), outstanding long-term stability (up to 60 days), and excellent selectivity. With the aid of an M5stack development board, portable visual and electrochemical H2O2 sensors are successfully constructed without complicated and expensive equipment or professional operators. When applied to the detection of H2O2 released from HeLa cells, the results obtained by the developed sensors are in good agreement with those from an ultraviolet‒visible spectrophotometer (UV‒vis) (1.97 µM vs. 2.08 µM) and electrochemical station (1.77 µM vs. 1.84 µM).

3.
Anal Chim Acta ; 1251: 341013, 2023 Apr 22.
Artigo em Inglês | MEDLINE | ID: mdl-36925295

RESUMO

Aerogels derived from the colloidal nanoparticles featured with hierarchical interconnected pore-rich networks guarantee their great potentials in various applications. Herein, the controllable assembly of three-dimensional aerogels based on Au nanoparticles (Au NPs) and reduced graphene oxide (rGO) nanosheets as building blocks via a bottom-up approach have been systematically clarified. The difference of building blocks and their assembly sequence were crucially to the final aerogel morphologies and electrochemical properties. Specifically, the highly porous graphene-gold dual aerogels (rGO-Au DAGs) with interconnected rGO nanosheets and Au nanowires showed high conductivity, large surface area and good biocompatibility. Thus, it was employed as an excellent matrix to immobilize enzyme for high-efficient bioelectrocatalysis. Taking bilirubin oxidase as an example, a more positive on-set potential (0.60 V) and a larger catalytic current density (0.77 mA cm-2@0.40 V) than those of other rGO-Au assemblies were achieved for direct bioelectrocatalytic O2 reduction. This study will provide an efficient strategy for unique dual-structural aerogels design and shed light to develop new functional materials for bioelectrocatalytic applications such as biosensors and biofuel cells.

4.
Dalton Trans ; 45(5): 2130-7, 2016 Feb 07.
Artigo em Inglês | MEDLINE | ID: mdl-26530277

RESUMO

The di-tert-butylphosphido-boratabenzene ligand (DTBB) reacts with [(C2H4)2RhCl]2 yielding the dimeric species [(C2H4)Rh(DTBB)]2 (1). This species was fully characterized by multinuclear NMR and X-ray crystallography. Complex 1 readily dissociates ethylene in solution and upon exposure to 1 atm of H2 is capable of carrying out the hydrogenation of ethylene. The characterization of two Rh-H species by multinuclear NMR spectroscopy is provided. The reactivity of 1 towards the catalytic hydrogenation of alkenes and alkynes at room temperature and 1 atm of H2 is reported and compared to the activity of Wilkinson's catalyst under the same reaction conditions.

5.
Dalton Trans ; 45(14): 6129-35, 2016 Apr 14.
Artigo em Inglês | MEDLINE | ID: mdl-26599518

RESUMO

The FLP species bis(2-(TMP)phenyl)chloroborane (TMP = 2,2,6,6-tetramethylpiperidine)(1) was prepared and crystallized as a monomeric Frustrated Lewis Pair (FLP) displaying no apparent B-N interaction. Species 1 readily reacts with H2 at room temperature to generate reversibly the zwitterionic H2 activation product 2. Interestingly, in the presence of a base, 2 releases HCl, generating the novel FLP species 3 which is also monomeric.

6.
Molecules ; 20(7): 11902-14, 2015 Jun 29.
Artigo em Inglês | MEDLINE | ID: mdl-26132911

RESUMO

The synthesis and structural characterization of a phenylene-bridged Frustrated Lewis Pair (FLP) having a 2,2,6,6­tetramethylpiperidine (TMP) as the Lewis base and a 9-borabicyclo[3.3.1]nonane (BBN) as the Lewis acid is reported. This FLP exhibits unique robustness towards the products of carbon dioxide hydrogenation. The compound shows reversible splitting of water, formic acid and methanol while no reaction is observed in the presence of excess formaldehyde. The molecule is incredibly robust, showing little sign of degradation after heating at 80 °C in benzene with 10 equiv. of formic acid for 24 h. The robustness of the system could be exploited in the design of metal-free catalysts for the hydrogenation of carbon dioxide.


Assuntos
Dióxido de Carbono/química , Hidrogênio/química , Água/química , Cristalografia por Raios X , Modelos Moleculares
7.
Inorg Chem ; 54(11): 5547-55, 2015 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-25993021

RESUMO

With the intent of generating metallocavitands isostructural to species [(CpZr)3(µ(3)-O)(µ(2)-OH)3(κO,O,µ(2)-O2C(R))3](+), the reaction of Cp*2ZrCl2 and Cp*ZrCl3 with phenylcarboxylic acids was carried out. Depending on the reaction conditions, five new complexes were obtained, which consisted of Cp*2ZrCl(κ(2)-OOCPh) (1), (Cp*ZrCl(κ(2)-OOCPh))2(µ-κ(2)-OOCPh)2 (2), [(Cp*Zr(κ(2)-OOCPh))2(µ-κ(2)-OOCPh)2(µ(2)-OH)2]·Et2O (3·Et2O), [[Cp*ZrCl2](µ-Cl)(µ-OH)(µ-O2CC6H5)[Cp*Zr]]2(µ-O2CC6H5)2 (4), and [Cp*ZrCl4][(Cp*Zr)3(κ2-OOC(C6H4Br)3(µ3-O)(µ2-Cl)2(µ2-OH)] [5](+)[Cp*ZrCl4](-). The structural characterization of the five complexes was carried out. Species 3·Et2O exhibits host-guest properties where the diethyl ether molecule is included in a cavity formed by two carboxylate moieties. The secondary interactions between the cavity and the diethyl ether molecule affect the structural parameters of the complex, as demonstrated be the comparison of the density functional theory models for 3 and 3·Et2O. Species 5 was shown to be isostructural to the [(CpZr)3(µ(3)-O)(µ(2)-OH)3(κO,O,µ(2)-O2C(R))3](+) metallocavitands.


Assuntos
Ácidos Carboxílicos/química , Cloretos/química , Complexos de Coordenação/química , Zircônio/química , Ácidos Carboxílicos/síntese química , Cloretos/síntese química , Complexos de Coordenação/síntese química , Cristalografia por Raios X , Modelos Moleculares
8.
Acta Crystallogr E Crystallogr Commun ; 71(Pt 2): o83, 2015 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-25878883

RESUMO

In the title compound, C13H16N2S2, the seven-membered ring adopts a boat conformation, with the two phenyl-ene C atoms representing the stern and the methyl-ene C atom as the prow. The thione S atoms and N-bound ethyl groups lie on the opposite side of the mol-ecule to the phenyl-ene ring so that the mol-ecule approximates mirror symmetry. In the crystal, supra-molecular layers in the bc plane are sustained by a pair of C-H⋯S inter-actions to the same S atom acceptor.

9.
Inorg Chem ; 53(6): 2883-91, 2014 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-24571257

RESUMO

A series of zirconium-carboxylate metallocavitands with the general formula [(CpZr)3(µ-κ2,O',O″CR)3(µ3-O)(µ2-OH)3]Cl (Cp = cyclopentadienyl; R = C5H4N (5), C6H7N (6), C18H14N (7), and C18H12N (8)) were synthesized in moderate to high yields (40-83%) by reacting the corresponding carboxylic acids 1-4 with Cp2ZrCl2 in a self-assembly procedure at room temperature. The metallocavitands were characterized using (1)H and (13)C NMR spectroscopy and by single-crystal X-ray diffraction. Complexes 7 and 8 exhibit efficient photoluminescence properties in solution. The photoluminescence peak of 7 was observed at 464 nm and that of 8 at 422 nm with respective quantum yields in solution of 87 and 65%.

11.
Inorg Chem ; 49(13): 5824-33, 2010 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-20515028

RESUMO

Syntheses, X-ray structural analyses, thermal behaviors, photochromism, and electrical properties of a series of methylviologen (MV(2+)) halobismuthate hybrids, namely, (MV)(3)[Bi(4)Cl(18)](H(2)O)(y) (1a, y approximately = 1.7), (MV)(4)[Bi(6)Cl(26)](H(2)O)(y) (2a, y approximately = 1.7), (MV)(4)[Bi(6)Cl(25.6)I(0.4)](H(2)O)(y) (3a, y approximately = 1.5), and (MV)(4)[Bi(6)Cl(24.6)I(1.4)](H(2)O)(y) (4a, y approximately = 1.3), are reported. Because of the thermal effect of a UV lamp or as a result of being heated up to 100 degrees C, all of the above compounds undergo a complete (1a, 2a, and 3a) or a partial (4a) dehydration together, in 2a and 3a, with an impressive structural reorganization involving a 90 degrees rotation of methylviologen dimers and, in 3a, a new Cl/I distribution, finally leading to (MV)(3)[Bi(4)Cl(18)] (1b), (MV)(4)[Bi(6)Cl(26)] (2b), (MV)(4)[Bi(6)Cl(25.6)I(0.4)] (3b), and (MV)(4)[Bi(6)Cl(24.6)I(1.4)](H(2)O)(x) (4a, x approximately = 0.65), respectively. In its turn, 4a (x approximately = 0.65) undergoes an abrupt structural change at 160 degrees C when water molecules are completely removed, leading to (MV)(4)[Bi(6)Cl(24.6)I(1.4)] (4b). Obviously, the two first dehydrated phases can be considered as the n = 2 (1b) and n = 3 (2b) members of the (MV)((2n+2)/2)[Bi(2n)Cl(8n+2)] family, and the ultimate member (n = infinity) with an infinite 1D double-chain inorganic framework, namely, (MV)[Bi(2)Cl(8)], has already been reported. According to the results of structural refinements, some positions of the Cl atoms in the [Bi(6)Cl(26)](8-) anionic cluster of 3a and 4a have been occupied by I atoms, finally leading to iodide-doped materials of the 2a type (percentage of doping: 3a, 1.5%; 4a, 5.4%). Upon UV irradiation, yellow crystals of 2a and 3a (which become 2b and 3b because of the thermal effect of the UV lamp) or yellow crystals of 2b, 3b, and 4a undergo a color change to black crystals (in the case of 2b), as observed in (MV)[Bi(2)Cl(8)], or light-brown crystals (in the cases of 3b and 4a). These photochromic properties are probably due to the photoinduced electron transfer from the anionic part to the methylviologen dications. In contrast, no color change is observed when yellow crystals of 1a or 1b and the iodide-doped (MV)[Bi(2)Cl(8-epsilon)I(epsilon)] material are irradiated. Because the relative positions of methylviologen to the host anionic frameworks are comparable in all structures (the N...Cl distances are about 3.4 A), these results indicate that such kinds of photochemical reactions depend on the dimension of the anionic networks, as well as the iodide doping. The single-crystal electrical conductivity measurements of 2b before and after irradiation were carried out between 150 and 393 K. The results prove that both of them are semiconductors with weak room temperature conductivity and that the band gap of the irradiated crystal (2b, 0.35 eV) is much smaller than that of the original hybrid 2a (1.0 eV).

12.
Zhonghua Nan Ke Xue ; 16(2): 150-3, 2010 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-20369700

RESUMO

OBJECTIVE: To investigate the restoration of erectile function by reconstructing cavernous nerves (CN) with small intestinal submucosa (SIS) grafts. METHODS: We prepared SIS grafts, established rat models and divided the models into a CN ablation, a sham-operation and an SIS graft group. The CNs at both sides were severed with 1 cm ablated in the first group, and 0.5 cm removed in the third, followed by reconstruction with the SIS grafts. Three months after surgery, the apomorphine test was performed to evaluate the erectile function, and then all the rats were sacrificed to detect the expression of nNOS in the penis. RESULTS: Penile erection was observed in 72.73% (8/11) of the rats for (1.07 +/- 0.89) times within 30 min in the SIS graft group, as compared with 0% (0/11) of the rats for (0.00 +/- 0.00) times in the CN ablation group (P < 0.01), and 90.91% (10/11) of the rats for (2.19 +/- 1.17) times in the sham-operation group (P < 0.01). The number of nNOS nerve fibers was significantly larger in the SIS graft than in the CN ablation group (70.36 +/- 10.09 versus 22.09 +/- 4.76, P < 0.01), but both were significantly smaller than that of the sham-operation group (90.81 +/- 5.69, P < 0.01). CONCLUSION: The SIS grafting technique contributes to the recanalization of the severed CN and restoration of erectile function in rats after surgical injury.


Assuntos
Disfunção Erétil/cirurgia , Mucosa Intestinal/transplante , Tecido Nervoso/cirurgia , Pênis/inervação , Animais , Intestino Delgado , Masculino , Regeneração Nervosa , Tecido Nervoso/lesões , Ereção Peniana , Ratos , Ratos Sprague-Dawley
14.
Chem Commun (Camb) ; (46): 6123-5, 2008 Dec 14.
Artigo em Inglês | MEDLINE | ID: mdl-19082093

RESUMO

High and unique gas and hydrocarbon adsorption in a highly stable guest-free microporous metal-organic framework constructed on rigid aliphatic ligands, H(2)bodc and ted, is reported in this work.

15.
Chem Commun (Camb) ; (44): 5743-5, 2008 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-19009067

RESUMO

The dehydration of a iodobismuthate hybrid built up from Bi(4)I(16) clusters and protonated L-cystine molecules involves an unprecedented reversible dynamic structural change in the solid state leading to 1D BiI(4) chains and 1D helical molecular chains, highlighting the templating effect of cations in the formation of iodobismuthate network.


Assuntos
Bismuto/química , Cistina/análogos & derivados , Cistina/química , Iodetos/química , Isomerismo , Conformação Molecular , Difração de Raios X
16.
Acta Crystallogr C ; 64(Pt 2): o41-3, 2008 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-18253002

RESUMO

The cocrystallization of adamantane-1,3-dicarboxylic acid (adc) and 4,4'-bipyridine (4,4'-bpy) yields a unique 1:1 cocrystal, C(12)H(16)O(4).C(10)H(8)N(2), in the C2/c space group, with half of each molecule in the asymmetric unit. The mid-point of the central C-C bond of the 4,4'-bpy molecule rests on a center of inversion, while the adc molecule straddles a twofold rotation axis that passes through two of the adamantyl C atoms. The constituents of this cocrystal are joined by hydrogen bonds, the stronger of which are O-H...N hydrogen bonds [O...N = 2.6801 (17) A] and the weaker of which are C-H...O hydrogen bonds [C...O = 3.367 (2) A]. Alternate adc and 4,4'-bpy molecules engage in these hydrogen bonds to form zigzag chains. In turn, these chains are linked through pi-pi interactions along the c axis to generate two-dimensional layers. These layers are neatly packed into a stable crystalline three-dimensional form via weak C-H...O hydrogen bonds [C...O = 3.2744 (19) A] and van der Waals attractions.


Assuntos
Adamantano/análogos & derivados , Ácidos Dicarboxílicos/química , Piridinas/química , Adamantano/química , Cristalização , Ligação de Hidrogênio , Estrutura Molecular
17.
Chem Asian J ; 3(3): 542-7, 2008 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-18161741

RESUMO

Three lanthanide coordination polymers constructed from infinite rod-shaped secondary building units (SBUs), [Nd(2)(H(2)O)(2)(cis-chdc)(2)(trans-chdc)]2H(2)O (1), Nd(2)(H(2)O)(4)(trans-chdc)(3) (2), and [Sm(2)(H(2)O)(2)(cis-chdc)(trans-chdc)(2)]4H(2)O (3) (chdcH(2)=1,4-cyclohexanedicarboxylic acid), were hydrothermally synthesized and structurally characterized. The structures of 1-3 are modulated by different ratios of the cis and trans configurations of chdc(2-) ligands, which was achieved by temperature control in the hydrothermal reactions. Crystal-structure analysis revealed that 1 is a four-connected pcu-type rod packing network built from cross-linking of rod-shaped neodymium-oxygen SBUs by cis- and trans-chdc(2-) ligands in a 2:1 ratio, 2 displays a complicated six-connected hex-type rod packing structure built by connection of rod-shaped neodymium-oxygen SBUs and trans-chdc(2-) ligands, and 3 features an unprecedented five-connected rod packing pattern constructed from rod-shaped samarium-oxygen SBUs and cis- and trans-chdc(2-) ligands in a 1:2 ratio.

19.
Inorg Chem ; 46(15): 6148-54, 2007 Jul 23.
Artigo em Inglês | MEDLINE | ID: mdl-17595074

RESUMO

The alpha1-(Br-(CH(2))(2)-NH(3))(2)PbI(4) hybrid perovskite undergoes a solid-state transformation, that is, the reaction between the organic cations and the perovskite layers to give the new hybrid perovskite (Br-(CH(2))(2)-NH(3))(2-x)(I-(CH(2))(2)-NH(3))(x)PbBr(x)I(4-x), based on mixed halide inorganic layers. This transformation has been followed by a conventional powder X-ray diffraction system equipped with a super speed detector, and both solid-state (13)C NMR and ESI/MS measurements have been adopted in the estimation of the rate of halide substitution. The first reaction step leads to the special composition of x approximately 1 (A phase), while the complete substitution is not achieved even at elevated temperature (x(max) approximately 1.85 (B phase)). This unprecedented solid-state reaction between organic and inorganic components of a hybrid perovskite can be considered as a completely new strategy to achieve interesting hybrid perovskites.

20.
Dalton Trans ; (9): 965-70, 2007 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-17308677

RESUMO

Pb(n)I(4n+2)((2n+2)-) (n = 3, 5) ribbons, which can be regarded as dimensional reductions of 2D perovskite layers, are stabilized by diprotonated cystamine cations in (NH(3)(CH(2))(2)SS(CH(2))(2)NH(3))(4)Pb(3)I(14),I(2) (1) and (NH(3)(CH(2))(2)SS(CH(2))(2)NH(3))(6)Pb(5)I(22).4H(2)O (2). Both 1 and 2 have interesting structural characteristics; it is unprecedented that the ribbons are linked via I(2) molecules incorporated in the lattice of 1, while tetrameric water clusters are trapped in the structure of 2. 2 undergoes a (reversible) water desorption process at 310 K leading to (NH(3)(CH(2))(2)SS(CH(2))(2)NH(3))(6)Pb(5)I(22).2H(2)O (3). The electrical behavior of 2 and 3 has been investigated in the ranges 293-310 K and 310-358 K respectively. Above 310 K, the electronic contribution remains constant while the ionic transference number tends towards unity showing almost pure ionic transport at 360 K (6 x 10(-7) S cm(-1) at 330 K) originating probably from the migration of protons through the hydrogen bonds connecting the water molecules to the cystamine counter cations.

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