Vascular smooth muscle cells (VSMC) are the main cellular component of vessel wall. The changes of VSMC functions including phenotypic transformation and apoptosis play a critical role in the pathogenesis of intracranial aneurysm (IA). Autophagy can participate in the regulation of vascular function by regulating cell function. In the initial stage of IA, the activation of autophagy can accelerate the phenotypic transformation of VSMC and inhibit VSMC apoptosis. With the progress of IA, the relationship between autophagy and apoptosis changes from antagonism to synergy or promotion, and a large number of apoptotic VSMC lead to the rupture of IA. In this review, we describe the role of autophagy regulating the function of VSMC in the occurrence, development and rupture of IA, for further understanding the pathogenesis of IA and finding molecular targets to prevent the formation and rupture of IA.
Autophagy ; Humans ; Intracranial Aneurysm ; pathology ; Muscle, Smooth, Vascular ; cytology ; Myocytes, Smooth Muscle ; cytology

Corpus cavernous smooth muscle cells are the main functional component of the corpus cavernosum penis, whose phenotypic modulation is the key initial step in the proliferation and migration of smooth muscle cells. Therefore, an insight into the mechanism of the phenotypic modulation of smooth muscle cells and its influencing factors is important for the prevention and management of penis erectile dysfunction. Smooth muscle cells are generally divided into contracting (differentiated) and composing (undifferentiated, proliferated or dedifferentiated) types. It is found that TGF-beta, transcription factor E2F1, BTEB2 and insulin may affect the phenotypic modulation of smooth muscle cells. This paper presents an overview of the progress in the researches on the phenotypic modulation of corpus cavernous smooth muscle cells and its influencing factors.
Cells, Cultured ; Humans ; Male ; Muscle, Smooth ; cytology ; Myocytes, Smooth Muscle ; classification ; cytology ; ultrastructure ; Penis ; Phenotype

The interactions between endothelial cells (EC) and smooth muscle cells (SMC) contribute to vascular physiological functions and also cause the occurrence and development of different kinds of diseases. Currently, EC-SMC co-culture model is the best way to study the interactions between the two kinds of cells. This article summarizes existing EC-SMC co-culture models and their effects on the structure and functions of the two kinds of cells. Microscopically speaking, it provides a basis for in-depth studies on their interactions as well as a reference for the establishment of in vitro EC-SMC co-culture system that is closer to organic physiology or pathology state.
Animals ; Coculture Techniques ; methods ; Endothelial Cells ; cytology ; metabolism ; Humans ; Muscle, Smooth, Vascular ; cytology ; Myocytes, Smooth Muscle ; cytology ; metabolism

BACKGROUNDBioreactors are pivotal tools for generating mechanical stimulation in functional tissue engineering study. This study aimed to create a bioreactor that can simulate urinary bladder mechanical properties, and to investigate the effects of a mechanically stimulated culture on urothelial cells and bladder smooth muscle cells.

METHODSWe designed a bioreactor to simulate the mechanical properties of bladder. A pressure-record system was used to evaluate the mechanical properties of the bioreactor by measuring the pressure in culture chambers. To test the biocompatibility of the bioreactor, viabilities of urothelial cells and smooth muscle cells cultured in the bioreactor under static and mechanically changed conditions were measured after 7-day culture. To evaluate the effect of mechanical stimulations on the vital cells, urethral cells and smooth muscle cells were cultured in the simulated mechanical conditions. After that, the viability and the distribution pattern of the cells were observed and compared with cells cultured in non-mechanical stimulated condition.

RESULTSThe bioreactor system successfully generated waveforms similar to the intended programmed model while maintaining a cell-seeded elastic membrane between the chambers. There were no differences between viabilities of urothelial cells ((91.90 ± 1.22)% vs. (93.14 ± 1.78)%, P > 0.05) and bladder smooth muscle cells ((93.41 ± 1.49)% vs. (92.61 ± 1.34)%, P > 0.05). The viability of cells and tissue structure observation after cultured in simulated condition showed that mechanical stimulation was the only factor affected cells in the bioreactor and improved the arrangement of cells on silastic membrane.

CONCLUSIONSThis bioreactor can effectively simulate the physiological and mechanical properties of the bladder. Mechanical stimulation is the only factor that affected the viability of cells cultured in the bioreactor. The bioreactor can change the growth behavior of urothelial cells and bladder smooth muscle cells, resulting in the cells undergoing adaptive changes in mechanically-stimulated environment.

Bioreactors ; Cell Line ; Humans ; Myocytes, Smooth Muscle ; cytology ; Tissue Engineering ; methods ; Urinary Bladder ; cytology ; Urothelium ; cytology

AIMIn order to establish a coculture system of ECs and SMCs and by which further study can be done.

METHODSECs in primary culture were grown on a side of Transwell membrane, and SMCs were grown on an other side of it or the bottom of culture well, so that two kinds of coculture systems were established, and detail observation on the coculture systems was carried out by transmission and scanning electron microscope.

RESULTSECs in primary culture were positive of VI factor by immunocytochemistry staining. ECs and SMCs were grown well on both sides of Transwell membrane, relative to ECs monolayer of "cobblestone appearance", SMCs were multilayer of "hills and valleys appearance". ECs and SMCs on both sides of Transwell membrane could form the gap junctions by micropores.

CONCLUSIONThe coculture systems of ECs and SMCs were established successfully by modeling the structural relationship of vascular wall.

Animals ; Aorta ; cytology ; Cell Communication ; Coculture Techniques ; Endothelial Cells ; cytology ; Endothelium, Vascular ; cytology ; Male ; Muscle, Smooth, Vascular ; cytology ; Myocytes, Smooth Muscle ; cytology ; Rabbits

OBJECTIVETo investigate the method of culturing rabbit clitoral smooth muscle cells(SMC) in vitro and their biological characteristics.

METHODSRabbit clitoral SMCs were cultured in vitro by enzymatically dispersed method, and morphological observation, cell counting and immunohistochemical staining were employed to study their biological characteristics.

RESULTSRabbit clitoral SMCs were spindle-shaped and parallelled along their longitudinal axis, and the attachment and proliferation in vitro were rapid.

CONCLUSIONRabbit clitoral SMCs cultured in vitro can grow and maintain their steady characteristics when provided with appropriate culture condition. Clitoral SMCs cultured in vitro can serve as a cell material for researches of clitoris.

Animals ; Cell Adhesion ; Cell Division ; Cells, Cultured ; Clitoris ; cytology ; Female ; Immunohistochemistry ; Myocytes, Smooth Muscle ; cytology ; Rabbits

Bronchi ; cytology ; Cell Culture Techniques ; Cells, Cultured ; Humans ; Myocytes, Smooth Muscle ; cytology

OBJECTIVETo study the kinetogenic effects of serum containing Semen Arecae, Dandelion, Semen raphani and Atractylodes macrocephala on the colonic smooth muscle cells of rats.

METHODSSerum containing Chinese materia medicas was made according to standard methods. Smooth muscle cells were isolated from the muscle layers of Wistar rat's colon, referred to modified Bitar's method. The contractile response of colonic smooth muscle cells to serum containing Chinese materia medicas (10%, 50%, 100% concentration) and other medicines (blank and 1 x 10(-3) mol/L acetylcholine) were separately observed. The contractility was presented by the decrease of the cell length between the drug groups and the control.

RESULTSSerum containing each Chinese materia medica can make dose-dependent contraction at different concentrations (P < 0.05), but the strongest effect of each serum had no significant difference (P > 0.05).

CONCLUSIONSerum containing Semen Arecae, Dandelion, Semen raphani and Atractylodes macrocephala can make notable contraction on colonic smooth muscle cells in rats.

Animals ; Cells, Cultured ; Colon ; cytology ; Drugs, Chinese Herbal ; pharmacology ; Medicine, Chinese Traditional ; Muscle Contraction ; drug effects ; Muscle, Smooth ; cytology ; Myocytes, Smooth Muscle ; drug effects ; Rats

AIMTo investigate the impact of human urotensin II (hUII) on pulmonary arterial smooth muscle cell (PASMCs) cycle in vitro.

METHODSPASMCs dissected from Wistar rats were cultured in vitro, and incubated with series of concentrations of hUII (10(-7) mol/L, 10(-8) mol/L, 10(-9) mol/L) for 12 hours under normoxia or hypoxia condition, in order to analyze cell cycle progression and sub-G1 of PASMCs by using flow cytometric analysis stain of propidium iodide, which represented the proliferative and apoptotic changes in PASMCs.

RESULTSThe study showed a dose-dependent effect of hUII on PASMCs proliferation, which reflected the increase both in percentage of S phase of cell cycle and proliferative index (PI). The response of PASMCs to hUII was different under normoxic and hypoxic conditions. Compared with the control group, the treatment of 10(-7) mol/L, 10(-8) mol/L and 10(-9) mol/L hUII produced an increase of 175%, 136% and 118% under normoxia, respectively, and 135%, 118% and 103% under hypoxia, respectively. The concentration 10(-7) mol/L hUII played a significant role in PASMCs proliferation both under hypoxia and normoxia (P < 0.01). The results of cell cycle did not show sub-G1 of PASMCs at various concentrations of hUII.

CONCLUSIONhUII may stimulate DNA synthesis in S phase cell cycle of PASMCs and the proliferation of PASMCs under normoxia and hypoxia conditions, which promote cell growth in a dose-dependent manner.

Animals ; Cell Cycle ; drug effects ; Cells, Cultured ; Humans ; Male ; Muscle, Smooth, Vascular ; cytology ; Myocytes, Smooth Muscle ; cytology ; drug effects ; Pulmonary Artery ; cytology ; Rats ; Rats, Wistar ; Urotensins ; pharmacology

AIMTo investigate the effect of fractalkine on cell proliferation of cultured rat pulmonary artery smooth muscle cells (PASMCs) in vitro.

METHODSRat PASMCs were cultured in vitro, and treated with different concentrations (10(-10), 10(-9), 10(-8) mol/L) of fractalkine for 12 h, 24 h and 48 h. The cell proliferation was quantified by MTT assay. The cell cycle of PASMCs was measured by flow cytometric(FCM) analysis.

RESULTSMTT assay showed that fractalkine promoted significantly the proliferation of PASMCs, and the effect was concentration-dependent. FCM analysis indicated that fractalkine increased the percentage of S phase and proliferative index (PI). The percentage of S phase and PI of PASMCs were increased after treated with fractalkine for 12 hours, which reached a maximal level at 24 hours.

CONCLUSIONFractalkine promotes rat PASMCs proliferation in a concentration-dependent manner.

Animals ; Cell Proliferation ; drug effects ; Cells, Cultured ; Chemokine CX3CL1 ; pharmacology ; Male ; Muscle, Smooth, Vascular ; cytology ; Myocytes, Smooth Muscle ; cytology ; drug effects ; Pulmonary Artery ; cytology ; Rats ; Rats, Sprague-Dawley