Biomedical subjects

Yu-Feng Huang

Publications and source records attributed to Yu-Feng Huang.

At least 19 recordsLinked to original sources

PubMed2003

[Molecular cloning of human sperm surface protein P34H gene and semi-quantitative analysis of its expression in testis and epididymidis].

OBJECTIVES: To identify, clone and sequence human sperm protein P34H gene and perform semi-quantitative analysis of its expression in testis and epididymidis. METHODS: Total RNA was prepared from human epididymidis tissue. cDNA fragment encoding human P34H was amplified by RT-PCR using specific primers, and then was cloned into pGEM-T vector. Inserted P34H gene was sequenced by ABI 377 DNA Sequencer. Meanwhile, semi-quantitative analysis of P34H expression in testis and caput, corpus, cauda epididymidis was done by RT-PCR based on beta-actin as an inner control. RESULTS: Human sperm protein P34H gene was successfully cloned and its cDNA sequence was submitted to GenBank(Accession No. AF515625). CONCLUSIONS: The cloning of P34H gene may be useful for the further basic and clinical studies on P34H.

Base Sequence↗

PubMed2003

[The distribution and detection of androgen receptor in extra-testis tissues].

Androgen receptor(AR) plays an important role in modulating the effects of androgen on target cells. It is well known that AR is mainly existed in testis. This paper reviewed the distribution of AR and its mRNA in prostate, epididymis, skin of penis, and some other tissues in non-genital system and tumors, such as the skin of scalp, hippocampus, fat, gastric cancer, cancer of larynx, and so on. Besides, this paper also reviewed the detection methods to AR, and further investigated the function of androgen.

Androgens↗

PubMed2003

[Andrology in the 21st century: keeping pace with the time].

This editorial briefly reviewed the history of andrology, its rapid development in recent years, the conception of male health, international andrology studies, the achievements of Chinese andrologists and the existing problems. It is highly necessary for Chinese andrology community to strengthen the international academic communication, join the International Society of Andrology and attend its activities actively.

Andrology↗

PubMed2003

[Detection and clinical significance of phospholipase A2 in semen of male infertile patients].

OBJECTIVES: To explore the clinical application of anti-human seminal plasma phospholipase A2 (PLA2) monoclonal antibody (McAb) for male infertility. METHODS: Enzyme-linked immunoabsorbent assay (ELISA), immunocytochemistry(ICC), as well as flow cytometry (FCM) analysis were established using two strains anti-human seminal plasma PLA2 McAb prepared by our laboratory to detect the PLA2 content in human seminal plasma and the anterior head region of spermatozoa, respectively. Then the PLA2 content in male infertile patients were compared with that in normal control with fertility. The seminal routine analysis was performed by computer-assisted semen analysis (CASA). RESULTS: The PLA2 content of infertile groups were (31.13 +/- 14.49) ng/ml in azoospermic patients, (17.71 +/- 12.45) ng/ml in oligospermic patients and (16.46 +/- 11.31) ng/ml in patients with normal sperm density, which were all higher than that of normal controls [(8.09 +/- 3.15) ng/ml, P < 0.01]; There was significantly negative correlation between PLA2 content in seminal plasma and sperm density(r = -0.602, P < 0.05), while there was insignificant correlation between PLA2 and sperm motility or percentage of motility. The PLA2 content in the anterior head region of spermatozoon of male infertile groups was significantly lower than that of normal controls by ICC and FCM(P < 0.01). CONCLUSIONS: PLA2 in human seminal plasma is closely related to male fertility, and the PLA2 deficiency in the head of spermatozoa may be one of the reasons causing male infertility. The methods detecting PLA2 content in seminal plasma and the head of spermatozoa can provide powerful evidences for exploring the mechanism of male infertility.

Adult↗

PubMed2003

[Cloning and eukaryotic expression of human lipocalin-type prostaglandin D synthase in Pichia Pastoris].

OBJECTIVES: To express human testis Lipocalin-type prostaglandin D synthase in Pichia Pastoris for further research on biological function and clinical applications. METHODS: Human testis L-PGDS gene coding region was amplified from plasmid pGEX-2T/htL-PGDS by PCR with a deletion of the signal peptide sequence. The DNA fragment was inserted into pPIC9 to construct yeast expression plasmid followed by transformation of the yeast GS115 strain with electroporation. The recombinant his-tag protein was induced to express by methanol. RESULTS: The sequence of the amplified DNA fragment was identical to that of human testis L-PGDS previously reported. The recombinant protein was found with a molecular mass of 27,000 on SDS-PAGE, which was identical to that of native L-PGDS. CONCLUSIONS: Secretory expression of human L-PGDS was obtained in Pichia Pastoris.

Cloning, Molecular↗

PubMed2003

[Significance of neutrophil elastase in diagnosis of male genital tract infection].

Neutrophil Elastase(NE) is a kind of neutral proteinase. Its value in the diagnosis of male genital tract infection has attracted increasing attention in recent years. NE has special diagnostic value in screening the typical genital tract infection caused by Neisseria gonorrhoeae, Chlamydia trachomatis, Ureaplasma urealyticum and Trichomonas, as well as other kinds of genital infection, such as leukocytospermia and periorchitis. NE has been considered as a specific marker of the male genital tract infection.

Chlamydia trachomatis↗

PubMed2003

[Detection of cholesterol ester transfer protein in semen of infertile patients].

OBJECTIVES: To detect the cholesterol ester transfer protein (CETP) levels in semen of infertile patients and evaluate the correlation between CETP in semial plasma and infertility. METHODS: One hundred and sixty-three infertile patients and fifteen fertile males were selected randomly. The routine examination of ejaculates was fulfilled by computer aided semen analysis (CASA). The CETP levels in all seminal plasma samples and fifty-five serum samples were detected by ELISA method. RESULTS: The CETP levels in infertile patients and fertile males were (2.21 +/- 1.23) microgram/L and (1.40 +/- 0.45) microgram/L, respectively. There were no significant differences between the two groups(P > 0.05). And there were no significant differences of CETP levels in seminal plasma among groups of azoospermia(n = 29), oligoasthenozoospermia (n = 58), oligospermia(n = 15), asthenozoospermia(n = 44) and normozoospermia(n = 17) in the infertile patients(P > 0.05). The CETP in seminal plasma and serum were detected in 55 infertile patients, and there was no correlation between CETP levels in seminal plasma and serum using Spearman analysis(r = 0.009, P > 0.05). The mean CETP level in seminal plasma was almost 1/1,000 of that in serum. CONCLUSIONS: The CETP level in seminal plasma is extremely low and has no relation with the changes of sperm density or motility. It may ensure the integrity of sperm membrane before the sperm enters into female genital tract.

Adult↗

PubMed2003

[A tentative research of testosterone supplement therapy on male senile dementia].

OBJECTIVES: To understand the hormone levels in male senile dementia patients and the effects of testosterone supplement theraphy (TST) on male senile dementia. METHODS: The general health condition, mental health condition, hormone levels, and some other aspects were evaluated in 9 patients with male senile dementia without significant contradiction for TST. 9 patients were treated with oral testosterone undecanoate 120 mg per day for six weeks, and relative changes were observed, detected and recorded. RESULTS: In 9 cases of male senile dementia, the average score was 5.33 in mini-mental state examination (MMSE), 14.56 in Hamilton depression scale (HAMD), 5.0 in geriatric depression scale (GDS), 32.56 in partial androgen deficiency of the aging male (PADAM) measuring form. The volume of testis was small (8.33 ml on average). After 1 week of having finished TST, the levels of serum testosterone (T) dropped significantly (dropped from average 2.88 ng/ml to 2.47 ng/ml, P < 0.05) in 9 patients with TST. General evaluation with clinician's global impression(CGI) for 9 patients showed 2 cases fail and 7 cases with progress (3 of them progress significantly). Average score dropped in HAMD form (10.67) and PADAM form (28.11). Physical strength and psychological status improved significantly, but vasomotor symptoms and sexual function failed response to the treatment. CONCLUSIONS: The levels of androgen is low, and the symptoms of androgen deficiency are readily seen in male senile dementia. TST can improve life quality of most patients to some extent.

Aged↗

PubMed2003

[Detection of sexual hormone in semen of patients with idiopathic azoospermia or oligospermia and its significance].

OBJECTIVES: To detect the sexual hormone level in semen of patients with idiopathic azoospermia and oligospermia, and further analyze the relationship between sexual hormone and idiopathic azoospermia and oligospermia. METHODS: 50 male patients with idiopathic azoospermia, 50 in idiopathic oligospermia and 50 male controls with normal sperm density were selected. The sperm density and sexual hormone in semen were detected respectively by routine semen analysis and chemical luminescence technique. RESULTS: The values of LH were (5.19 +/- 0.67) IU/L and (4.77 +/- 0.68) IU/L, and those of FSH were (1.90 +/- 0.79) IU/L and (2.27 +/- 0.25) IU/L in idiopathic azoospermia and oligospermia respectively, and the values of LH and FSH were (2.19 +/- 0.22) IU/L and (1.61 +/- 0.14) IU/L in normal control group respectively. There were significant differences in the values of LH and FSH between idiopathic azoospermia and normal control group(P < 0.01 or P < 0.05). The values of PRL were (6.25 +/- 0.51) ng/ml and (6.33 +/- 0.34) ng/ml, and those of T were (1.51 +/- 0.12) ng/ml and (1.68 +/- 0.71) ng/ml in idiopathic azoospermia and oligospermia respectively, and the values of PRL and T were (6.36 +/- 0.32) ng/ml and (1.83 +/- 0.09) ng/ml in normal control group respectively. There were no significant difference in the values of PRL between idiopathic azoospermia, oligospermia and normal control group, but there were significant differences of T between idiopathic azoospermia and normal control. Compared with 0.84 +/- 0.20 in normal control, the values of T/LH were 0.35 +/- 0.09 and 0.29 +/- 0.04 in idiopathic oligospermia and azoospermia respectively and there were significant differences(P < 0.05). CONCLUSIONS: The changes of LH, FSH and T values may be one of the reasons that cause the dysfunction of spermatogenesis and sperm maturation in patients with idiopathic azoospermia and oligospermia. The study of semen hormone may lead to new strategies in the treatment to azoospermia and oligospermia.

Adult↗

PubMed2003

[Advances in sperm membrane antigens].

A series of sperm membrane antigens, the important molecular markers associated with the program of spermatogenesis and maturation of sperm, which also are for attachment of the physiological mechanism of the sperm-egg interaction and fusion and the pathological changes in the infertility, were reviewed. Some traditional crucial sperm membrane proteins, such as FA-1, PH-20, fertilin, have been cloned and sequenced, and some novel gene which encode new proteins associated with the sperm membrane also have been screened out successively. All of these provided a basement for lucubration of these proteins and the research of the contraception vaccine.

Animals↗

PubMed2003

[Infection of Chlamydia trachomatis and apoptosis of spermatogenic cells].

OBJECTIVE: To evaluate the relationship between infection of Chlamydia Trachomatis(Ct) and apoptosis of spermatogenic cells. METHODS: Apoptotic spermatogenic cells were examined by Wright-Giemsa staining and the terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate(dUTP)-biotin nick-end labeling(TUNEL) technique. RESULTS: Apoptosis rate of Ct infective group was significantly higher than that of normal group(P < 0.01). CONCLUSIONS: Ct infection may cause the apoptosis of spermatogenic cells, which affords an objective evidence for illustrating the mechanism of Ct-infection-induced male infertility.

Adult↗

PubMed2003

[Inhibin B levels of serum and seminal plasma in fertile and infertile males].

OBJECTIVES: To investigate the possible differences in the inhibin B levels of seminal plasma and serum between fertile and infertile males and to obtain information on the relation between serum inhibin B or seminal plasma inhibin B and spermatogenesis. METHODS: Semen and blood samples were collected from fertile(n = 20), oligospermia(n = 20), asthenospermia(n = 22) and non-obstructive azoospermia(NOA) (n = 20) males at 8:00 am = 10:00 am. Semen parameters were analyzed. Levels of inhibin B in seminal plasma and serum, ACP, Fru, alpha-Glu in seminal plasma, serum levels of FSH, T, LH were determined. RESULTS: Both levels of serum inhibin B and levels of seminal plasma inhibin B correlated significantly negatively with serum FSH(r = -0.536, P < 0.001 vs r = -0.288, P = 0.01), and statistically positively with sperm concentration(r = 0.49, P < 0.001 vs r = 0.48, P < 0.001). There was positive correlation between levels of seminal plasma inhibin B and activity of alpha-Glu in seminal plasma (r = 0.377, P = 0.001). The difference in levels of seminal plasma inhibin B was found only between fertile males or asthenospermia and NOA (P < 0.01 and P < 0.05, respectively). However, significant differences in levels of serum inhibin B were found not only between males with normal sperm concentration (including fertile males and asthenospermia) and NOA (P < 0.01), fertile males and oligospermia (P < 0.05), but also between oligospermia and NOA (P < 0.05). There was no correlation between serum inhibin B and seminal plasma inhibin B. CONCLUSIONS: Both levels of serum inhibin B and seminal plasma inhibin B could reflect testis spermatogenesis status. Levels of seminal plasma inhibin B could also reflect the function of seminiferous duct, but the wide range of values limited its applicability.

Adult↗

PubMed2003

[Genetic variations and possible therapeutic ways of male infertility].

Chromosome aberrant and some gene mutations play an important role in male infertility. A knowledge of a variety of new genetic causes is crucial for the prevention and treatment of male infertility. This review focused on known genetic causes of male infertility, male fertility-related candidate genes from knockout mice, genetic analysis and treatment of infertility in men.

Animals↗

PubMed2003

[Advances in the studies of Chlamydia trachomatis infection in males].

Chlamydia trachomatis(Ct) infection in reproductive tract is one of the most common sexually transmitted diseases at present. However, relatively fewer studies are made on Ct infection in men. The paper reviews the epidemiology of Ct infection in males, Ct infection and male diseases, Ct infection and male infertility, and the detection of Ct infection in men. It aims at providing a theoretical basis and a practical guide for the prevention and control of Ct infection in men.

Chlamydia Infections↗

PubMed2003

[Advances in microinsemination with spermatid].

Men with non-obstructive azoospermia(NOA) can now be treated by using intra-oocyte round spermatid injection(ROSI) or elongated spermatid injection(ELSI). Spermatids can be retrieved from semen or from testis biopsy specimens. But the rates of fertilization and pregnancy with spermatids have been disappointing. Many problems limiting success rate and hindering a wide application of this technique still remain unresolved, including the incomplete maturation of spermatid nuclear, oocyte activation and identification of a live spermatid.

Azoospermia↗

PubMed2003

[Chinese traditional medicine yi kang ling to treat immunity infertility caused by anti-sperm antibody: the experimental research. I].

OBJECTIVE: To observe the effects of Chinese traditional medicine Yi Kang Ling (YKL) on immunity infertility caused by anti-sperm antibodies (AsAb). METHODS: Based on the animal model of immunity infertility, seventy-five pairs of New Zealand rabbits were divided into three groups: YKL treatment group (sub-divided into mini-, midi- and maxi-dosage groups), prednisone treatment group and non-treatment group. Five pairs of normal rabbits were used as control. The AsAb from the rabbit serum were detected on the 15th, 30th and 45th day of treatment respectively. The sperm density, activity, the mobility and AsAb of seminal plasma from the obedient rabbits were determined. RESULTS: Statistics showed that on the 45th day in mini- and maxi-YKL and prednisone treatment groups the positive serum AsAb reversing ratio reached 100%, and the seminal plasma AsAb reversing ratios were 85% in mini- and maxi-YKL group, 83% in midi-YKL and prednisone groups, while in non-treatment group the reversing ratios of the positive serum AsAb and seminal plasma AsAb were only 20% and 25% respectively. There were also remarkable differences (P < 0.05) in both serum AsAb and seminal plasma AsAb on the 45th day of treatment between YKL, prednisone treatment groups and the non-treatment group. CONCLUSIONS: YKL can effectively reverse the AsAb positive results, hence increasing sperm mobility and improving sperm quality.

Animals↗

PubMed2003

[Role of sulfogalactosylglycerolipid and sulfolipidimmobilizing protein 1 in sperm-egg plasma membrane interaction].

Sperm-egg plasma membrane interaction is one of the important steps of mammalian fertilization. Many sperm and egg surface proteins are reported to be involved in sperm-zona pellucida interaction. Sulfogalactosylglycerolipid(SGG) is the major sulfoglycolipid in the germ cells of mammalian and lower vertebrates, mainly in the sperm head. It is a differentiation marker in spermatogenesis restricted to the zygotene and early pachytene spermatocytes. Sulfolipidimmobilizing protein 1 (SLIP1) is the major sulfoglycolipid of mammalian germ cells and eggs, with the same localization as SGG in the sperm. SLIP1 binds specificity to SGG, both playing a vital role in sperm-egg interaction. This article is aimed at reviewing the localization of SGG and SLIP1 in the germ cell surface and their role and related mechanism in gamete formation.

Animals↗

PubMed2002

Autosomal aberrations associated with testicular dysgenesis or spermatogenic arrest in Chinese patients.

AIM: To analyze the relationship between autosomal aberrations and testicular dysgenesis or spermatogenic arrest in Chinese patients and to map the corresponding regions on each autosome in regard to the recorded aberrations accompanying these distubances. METHODS: One hundred and nineteen cases of aberrant karyotypes with testicular dysgenesis, azoospermia or oligozoospermia reported in five Chinese journals and one monograph were analyzed. For each autosome, the type and frequency of chromosomal aberrations were counted and the regions corresponding to the disturbances were mapped out. RESULTS: Chromosomes 13, 14, 9, 21 exhibited a high frequency of aberration and bands 14q11 and 13p11 were the two regions showing the highest linkage to testicular dysgenesis or infertility. The frequency of chromosomal aberrations was higher in bands 9p11 and 22q than in others. CONCLUSION: Autosomes 13, 14, 9 and 21 in the order of importance play a critical role in testicular development and spermatogenesis and other autosomes may also contribute; the following regions, 14q11, 13p11,9p11, and 22q, are of high significance.

Asian People↗